5 Author: Pekka Riikonen <priikone@silcnet.org>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 if (!server->config->server_keys ||
125 !server->config->server_keys->public_key ||
126 !server->config->server_keys->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
130 server->public_key = server->config->server_keys->public_key;
131 server->private_key = server->config->server_keys->private_key;
133 /* XXX After server is made as Silc Server Library this can be given
134 as argument, for now this is hard coded */
135 server->params = silc_calloc(1, sizeof(*server->params));
136 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
137 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
138 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
139 server->params->retry_keep_trying = FALSE;
140 server->params->protocol_timeout = 60;
141 server->params->require_reverse_mapping = FALSE;
143 /* Set log files where log message should be saved. */
144 server->config->server = server;
145 silc_server_config_setlogfiles(server->config);
147 /* Register all configured ciphers, PKCS and hash functions. */
148 if (!silc_server_config_register_ciphers(server->config))
149 silc_cipher_register_default();
150 if (!silc_server_config_register_pkcs(server->config))
151 silc_pkcs_register_default();
152 if (!silc_server_config_register_hashfuncs(server->config))
153 silc_hash_register_default();
154 if (!silc_server_config_register_hmacs(server->config))
155 silc_hmac_register_default();
157 /* Initialize random number generator for the server. */
158 server->rng = silc_rng_alloc();
159 silc_rng_init(server->rng);
160 silc_rng_global_init(server->rng);
162 /* Initialize hash functions for server to use */
163 silc_hash_alloc("md5", &server->md5hash);
164 silc_hash_alloc("sha1", &server->sha1hash);
166 /* Initialize none cipher */
167 silc_cipher_alloc("none", &server->none_cipher);
169 /* Create a listening server. Note that our server can listen on
170 multiple ports. All listeners are created here and now. */
171 /* XXX Still check this whether to use server_info or listen_port. */
173 while(server->config->listen_port) {
176 tmp = silc_net_create_server(server->config->listen_port->port,
177 server->config->listen_port->host);
181 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
182 sock[sock_count] = tmp;
183 server->config->listen_port = server->config->listen_port->next;
187 /* Initialize ID caches */
188 server->local_list->clients =
189 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
190 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
191 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
193 /* These are allocated for normal server as well as these hold some
194 global information that the server has fetched from its router. For
195 router these are used as they are supposed to be used on router. */
196 server->global_list->clients =
197 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
198 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
199 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
201 /* Allocate the entire socket list that is used in server. Eventually
202 all connections will have entry in this table (it is a table of
203 pointers to the actual object that is allocated individually
205 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
206 sizeof(*server->sockets));
208 for (i = 0; i < sock_count; i++) {
209 SilcSocketConnection newsocket = NULL;
211 /* Set socket to non-blocking mode */
212 silc_net_set_socket_nonblock(sock[i]);
213 server->sock = sock[i];
215 /* Create a Server ID for the server. */
216 silc_id_create_server_id(sock[i], server->rng, &id);
222 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
223 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
224 server->id_type = SILC_ID_SERVER;
225 server->server_name = server->config->server_info->server_name;
227 /* Add ourselves to the server list. We don't have a router yet
228 beacuse we haven't established a route yet. It will be done later.
229 For now, NULL is sent as router. This allocates new entry to
232 silc_idlist_add_server(server->local_list,
233 server->config->server_info->server_name,
234 server->server_type, server->id, NULL, NULL);
236 SILC_LOG_ERROR(("Could not add ourselves to cache"));
240 /* Add ourselves also to the socket table. The entry allocated above
241 is sent as argument for fast referencing in the future. */
242 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
245 server->sockets[sock[i]] = newsocket;
247 /* Perform name and address lookups to resolve the listenning address
249 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
251 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
253 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
254 newsocket->hostname ? newsocket->hostname :
255 newsocket->ip ? newsocket->ip : ""));
256 server->stat.conn_failures++;
259 if (!newsocket->hostname)
260 newsocket->hostname = strdup(newsocket->ip);
262 newsocket->port = silc_net_get_local_port(sock[i]);
264 /* Put the allocated socket pointer also to the entry allocated above
265 for fast back-referencing to the socket list. */
266 id_entry->connection = (void *)server->sockets[sock[i]];
267 server->id_entry = id_entry;
270 /* Register protocols */
271 silc_server_protocols_register();
273 /* Initialize the scheduler. */
274 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
275 if (!server->schedule)
278 /* Add the first task to the scheduler. This is task that is executed by
279 timeout. It expires as soon as the caller calls silc_server_run. This
280 task performs authentication protocol and key exchange with our
282 silc_schedule_task_add(server->schedule, sock[0],
283 silc_server_connect_to_router,
284 (void *)server, 0, 1,
286 SILC_TASK_PRI_NORMAL);
288 /* Add listener task to the scheduler. This task receives new connections
289 to the server. This task remains on the queue until the end of the
291 silc_schedule_task_add(server->schedule, sock[0],
292 silc_server_accept_new_connection,
293 (void *)server, 0, 0,
295 SILC_TASK_PRI_NORMAL);
296 server->listenning = TRUE;
298 /* If server connections has been configured then we must be router as
299 normal server cannot have server connections, only router connections. */
300 if (server->config->servers)
301 server->server_type = SILC_ROUTER;
303 /* Register the ID Cache purge task. This periodically purges the ID cache
304 and removes the expired cache entries. */
306 /* Clients local list */
307 purge = silc_calloc(1, sizeof(*purge));
308 purge->cache = server->local_list->clients;
309 purge->schedule = server->schedule;
310 silc_schedule_task_add(purge->schedule, 0,
312 (void *)purge, 600, 0,
313 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
315 /* Clients global list */
316 purge = silc_calloc(1, sizeof(*purge));
317 purge->cache = server->global_list->clients;
318 purge->schedule = server->schedule;
319 silc_schedule_task_add(purge->schedule, 0,
321 (void *)purge, 300, 0,
322 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
324 SILC_LOG_DEBUG(("Server initialized"));
326 /* We are done here, return succesfully */
330 for (i = 0; i < sock_count; i++)
331 silc_net_close_server(sock[i]);
336 /* Fork server to background and set gid+uid to non-root.
337 Silcd will not run as root, so trying to set either user or group to
338 root will cause silcd to exit. */
340 void silc_server_daemonise(SilcServer server)
342 /* Are we executing silcd as root or a regular user? */
349 if (!server->config->identity || !server->config->identity->user ||
350 !server->config->identity->group) {
351 fprintf(stderr, "Error:"
352 "\tSILC server must not be run as root. For the security of your\n"
353 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
354 "\tuser account. Modify the [Identity] configuration section to run\n"
355 "\tthe server as non-root user.\n");
359 /* Get the values given for user and group in configuration file */
360 user=server->config->identity->user;
361 group=server->config->identity->group;
363 /* Check whether the user/group information is text */
364 if (atoi(user)!=0 || atoi(group)!=0) {
365 SILC_LOG_DEBUG(("Invalid user and/or group information"));
366 SILC_LOG_DEBUG(("User and/or group given as number"));
367 fprintf(stderr, "Invalid user and/or group information\n");
368 fprintf(stderr, "Please assign them as names, not numbers\n");
372 /* Catch the nasty incident of string "0" returning 0 from atoi */
373 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
374 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
375 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
383 fprintf(stderr, "No such user %s found\n", user);
388 fprintf(stderr, "No such group %s found\n", group);
392 /* Check whether user and/or group is set to root. If yes, exit
393 immediately. Otherwise, setgid and setuid server to user.group */
394 if (gr->gr_gid==0 || pw->pw_uid==0) {
395 fprintf(stderr, "Error:"
396 "\tSILC server must not be run as root. For the security of your\n"
397 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
398 "\tuser account. Modify the [Identity] configuration section to run\n"
399 "\tthe server as non-root user.\n");
402 /* Fork server to background, making it a daemon */
404 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
405 SILC_LOG_DEBUG(("Forking SILC server to background"));
410 SILC_LOG_DEBUG(("Changing to group %s", group));
411 if(setgid(gr->gr_gid)==0) {
412 SILC_LOG_DEBUG(("Setgid to %s", group));
414 SILC_LOG_DEBUG(("Setgid to %s failed", group));
415 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
419 SILC_LOG_DEBUG(("Changing to user nobody"));
420 if(setuid(pw->pw_uid)==0) {
421 SILC_LOG_DEBUG(("Setuid to %s", user));
423 SILC_LOG_DEBUG(("Setuid to %s failed", user));
424 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
430 /* Fork server to background, making it a daemon */
432 SILC_LOG_DEBUG(("Server started as user"));
433 SILC_LOG_DEBUG(("Forking SILC server to background"));
440 /* Stops the SILC server. This function is used to shutdown the server.
441 This is usually called after the scheduler has returned. After stopping
442 the server one should call silc_server_free. */
444 void silc_server_stop(SilcServer server)
446 SILC_LOG_DEBUG(("Stopping server"));
448 silc_schedule_stop(server->schedule);
449 silc_schedule_uninit(server->schedule);
451 silc_server_protocols_unregister();
453 SILC_LOG_DEBUG(("Server stopped"));
456 /* The heart of the server. This runs the scheduler thus runs the server.
457 When this returns the server has been stopped and the program will
460 void silc_server_run(SilcServer server)
462 SILC_LOG_DEBUG(("Running server"));
464 SILC_LOG_INFO(("SILC Server started"));
466 /* Start the scheduler, the heart of the SILC server. When this returns
467 the program will be terminated. */
468 silc_schedule(server->schedule);
471 /* Timeout callback that will be called to retry connecting to remote
472 router. This is used by both normal and router server. This will wait
473 before retrying the connecting. The timeout is generated by exponential
474 backoff algorithm. */
476 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
478 SilcServerConnection sconn = (SilcServerConnection)context;
479 SilcServer server = sconn->server;
481 SILC_LOG_INFO(("Retrying connecting to a router"));
483 /* Calculate next timeout */
484 if (sconn->retry_count >= 1) {
485 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
486 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
487 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
489 sconn->retry_timeout = server->params->retry_interval_min;
491 sconn->retry_count++;
492 sconn->retry_timeout = sconn->retry_timeout +
493 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
495 /* If we've reached max retry count, give up. */
496 if (sconn->retry_count > server->params->retry_count &&
497 server->params->retry_keep_trying == FALSE) {
498 SILC_LOG_ERROR(("Could not connect to router, giving up"));
502 /* Wait one before retrying */
503 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
504 context, sconn->retry_timeout,
505 server->params->retry_interval_min_usec,
506 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
509 /* Generic routine to use connect to a router. */
511 SILC_TASK_CALLBACK(silc_server_connect_router)
513 SilcServerConnection sconn = (SilcServerConnection)context;
514 SilcServer server = sconn->server;
515 SilcSocketConnection newsocket;
516 SilcProtocol protocol;
517 SilcServerKEInternalContext *proto_ctx;
520 SILC_LOG_INFO(("Connecting to the router %s on port %d",
521 sconn->remote_host, sconn->remote_port));
523 /* Connect to remote host */
524 sock = silc_net_create_connection(sconn->remote_port,
527 SILC_LOG_ERROR(("Could not connect to router"));
528 silc_schedule_task_add(server->schedule, fd,
529 silc_server_connect_to_router_retry,
530 context, 0, 1, SILC_TASK_TIMEOUT,
531 SILC_TASK_PRI_NORMAL);
535 /* Set socket options */
536 silc_net_set_socket_nonblock(sock);
537 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
539 /* Create socket connection for the connection. Even though we
540 know that we are connecting to a router we will mark the socket
541 to be unknown connection until we have executed authentication
543 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
544 server->sockets[sock] = newsocket;
545 newsocket->hostname = strdup(sconn->remote_host);
546 newsocket->ip = strdup(sconn->remote_host);
547 newsocket->port = sconn->remote_port;
548 sconn->sock = newsocket;
550 /* Allocate internal protocol context. This is sent as context
552 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
553 proto_ctx->server = (void *)server;
554 proto_ctx->context = (void *)sconn;
555 proto_ctx->sock = newsocket;
556 proto_ctx->rng = server->rng;
557 proto_ctx->responder = FALSE;
559 /* Perform key exchange protocol. silc_server_connect_to_router_second
560 will be called after the protocol is finished. */
561 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
562 &protocol, proto_ctx,
563 silc_server_connect_to_router_second);
564 newsocket->protocol = protocol;
566 /* Register a timeout task that will be executed if the protocol
567 is not executed within set limit. */
568 proto_ctx->timeout_task =
569 silc_schedule_task_add(server->schedule, sock,
570 silc_server_timeout_remote,
571 server, server->params->protocol_timeout,
572 server->params->protocol_timeout_usec,
576 /* Register the connection for network input and output. This sets
577 that scheduler will listen for incoming packets for this connection
578 and sets that outgoing packets may be sent to this connection as
579 well. However, this doesn't set the scheduler for outgoing traffic,
580 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
581 later when outgoing data is available. */
582 context = (void *)server;
583 SILC_REGISTER_CONNECTION_FOR_IO(sock);
585 /* Run the protocol */
586 silc_protocol_execute(protocol, server->schedule, 0, 0);
589 /* This function connects to our primary router or if we are a router this
590 establishes all our primary routes. This is called at the start of the
591 server to do authentication and key exchange with our router - called
594 SILC_TASK_CALLBACK(silc_server_connect_to_router)
596 SilcServer server = (SilcServer)context;
597 SilcServerConnection sconn;
599 SILC_LOG_DEBUG(("Connecting to router(s)"));
601 /* If we are normal SILC server we need to connect to our cell's
603 if (server->server_type == SILC_SERVER) {
604 SILC_LOG_DEBUG(("We are normal server"));
606 /* Create connection to the router, if configured. */
607 if (server->config->routers) {
609 /* Allocate connection object for hold connection specific stuff. */
610 sconn = silc_calloc(1, sizeof(*sconn));
611 sconn->server = server;
612 sconn->remote_host = strdup(server->config->routers->host);
613 sconn->remote_port = server->config->routers->port;
615 silc_schedule_task_add(server->schedule, fd,
616 silc_server_connect_router,
617 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
618 SILC_TASK_PRI_NORMAL);
623 /* If we are a SILC router we need to establish all of our primary
625 if (server->server_type == SILC_ROUTER) {
626 SilcServerConfigSectionServerConnection *ptr;
628 SILC_LOG_DEBUG(("We are router"));
630 /* Create the connections to all our routes */
631 ptr = server->config->routers;
634 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
635 ptr->initiator ? "Initiator" : "Responder",
636 ptr->host, ptr->port));
638 if (ptr->initiator) {
639 /* Allocate connection object for hold connection specific stuff. */
640 sconn = silc_calloc(1, sizeof(*sconn));
641 sconn->server = server;
642 sconn->remote_host = strdup(ptr->host);
643 sconn->remote_port = ptr->port;
645 silc_schedule_task_add(server->schedule, fd,
646 silc_server_connect_router,
647 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
648 SILC_TASK_PRI_NORMAL);
658 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
660 /* There wasn't a configured router, we will continue but we don't
661 have a connection to outside world. We will be standalone server. */
662 server->standalone = TRUE;
665 /* Second part of connecting to router(s). Key exchange protocol has been
666 executed and now we will execute authentication protocol. */
668 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
670 SilcProtocol protocol = (SilcProtocol)context;
671 SilcServerKEInternalContext *ctx =
672 (SilcServerKEInternalContext *)protocol->context;
673 SilcServer server = (SilcServer)ctx->server;
674 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
675 SilcSocketConnection sock = ctx->sock;
676 SilcServerConnAuthInternalContext *proto_ctx;
677 SilcServerConfigSectionServerConnection *conn = NULL;
679 SILC_LOG_DEBUG(("Start"));
681 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
682 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
683 /* Error occured during protocol */
684 silc_protocol_free(protocol);
685 sock->protocol = NULL;
686 silc_ske_free_key_material(ctx->keymat);
688 silc_packet_context_free(ctx->packet);
690 silc_ske_free(ctx->ske);
692 silc_free(ctx->dest_id);
694 silc_schedule_task_del_by_callback(server->schedule,
695 silc_server_failure_callback);
696 silc_server_disconnect_remote(server, sock, "Server closed connection: "
697 "Key exchange failed");
701 /* We now have the key material as the result of the key exchange
702 protocol. Take the key material into use. Free the raw key material
703 as soon as we've set them into use. */
704 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
705 ctx->ske->prop->cipher,
706 ctx->ske->prop->pkcs,
707 ctx->ske->prop->hash,
708 ctx->ske->prop->hmac,
709 ctx->ske->prop->group,
711 silc_protocol_free(protocol);
712 sock->protocol = NULL;
713 silc_ske_free_key_material(ctx->keymat);
715 silc_packet_context_free(ctx->packet);
717 silc_ske_free(ctx->ske);
719 silc_free(ctx->dest_id);
721 silc_schedule_task_del_by_callback(server->schedule,
722 silc_server_failure_callback);
723 silc_server_disconnect_remote(server, sock, "Server closed connection: "
724 "Key exchange failed");
727 silc_ske_free_key_material(ctx->keymat);
729 /* Allocate internal context for the authentication protocol. This
730 is sent as context for the protocol. */
731 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
732 proto_ctx->server = (void *)server;
733 proto_ctx->context = (void *)sconn;
734 proto_ctx->sock = sock;
735 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
736 proto_ctx->dest_id_type = ctx->dest_id_type;
737 proto_ctx->dest_id = ctx->dest_id;
739 /* Resolve the authentication method used in this connection. Check if
740 we find a match from user configured connections */
741 conn = silc_server_config_find_router_conn(server->config,
745 /* Match found. Use the configured authentication method */
746 proto_ctx->auth_meth = conn->auth_meth;
747 if (conn->auth_data) {
748 proto_ctx->auth_data = strdup(conn->auth_data);
749 proto_ctx->auth_data_len = strlen(conn->auth_data);
752 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
753 sock->hostname, sock->ip, sock->port));
754 silc_protocol_free(protocol);
755 sock->protocol = NULL;
757 silc_packet_context_free(ctx->packet);
759 silc_ske_free(ctx->ske);
761 silc_free(ctx->dest_id);
763 silc_schedule_task_del_by_callback(server->schedule,
764 silc_server_failure_callback);
765 silc_server_disconnect_remote(server, sock, "Server closed connection: "
766 "Key exchange failed");
770 /* Free old protocol as it is finished now */
771 silc_protocol_free(protocol);
773 silc_packet_context_free(ctx->packet);
775 sock->protocol = NULL;
777 /* Allocate the authentication protocol. This is allocated here
778 but we won't start it yet. We will be receiving party of this
779 protocol thus we will wait that connecting party will make
781 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
782 &sock->protocol, proto_ctx,
783 silc_server_connect_to_router_final);
785 /* Register timeout task. If the protocol is not executed inside
786 this timelimit the connection will be terminated. Currently
787 this is 15 seconds and is hard coded limit (XXX). */
788 proto_ctx->timeout_task =
789 silc_schedule_task_add(server->schedule, sock->sock,
790 silc_server_timeout_remote,
791 (void *)server, 15, 0,
795 /* Run the protocol */
796 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
799 /* Finalizes the connection to router. Registers a server task to the
800 queue so that we can accept new connections. */
802 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
804 SilcProtocol protocol = (SilcProtocol)context;
805 SilcServerConnAuthInternalContext *ctx =
806 (SilcServerConnAuthInternalContext *)protocol->context;
807 SilcServer server = (SilcServer)ctx->server;
808 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
809 SilcSocketConnection sock = ctx->sock;
810 SilcServerEntry id_entry;
812 SilcServerHBContext hb_context;
813 unsigned char *id_string;
815 SilcIDListData idata;
817 SILC_LOG_DEBUG(("Start"));
819 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
820 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
821 /* Error occured during protocol */
823 silc_free(ctx->dest_id);
824 silc_server_disconnect_remote(server, sock, "Server closed connection: "
825 "Authentication failed");
829 /* Add a task to the queue. This task receives new connections to the
830 server. This task remains on the queue until the end of the program. */
831 if (!server->listenning) {
832 silc_schedule_task_add(server->schedule, server->sock,
833 silc_server_accept_new_connection,
834 (void *)server, 0, 0,
836 SILC_TASK_PRI_NORMAL);
837 server->listenning = TRUE;
840 /* Send NEW_SERVER packet to the router. We will become registered
841 to the SILC network after sending this packet. */
842 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
843 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
844 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
845 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
846 silc_buffer_format(packet,
847 SILC_STR_UI_SHORT(id_len),
848 SILC_STR_UI_XNSTRING(id_string, id_len),
849 SILC_STR_UI_SHORT(strlen(server->server_name)),
850 SILC_STR_UI_XNSTRING(server->server_name,
851 strlen(server->server_name)),
854 /* Send the packet */
855 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
856 packet->data, packet->len, TRUE);
857 silc_buffer_free(packet);
858 silc_free(id_string);
860 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
862 /* Add the connected router to local server list */
863 server->standalone = FALSE;
864 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
865 SILC_ROUTER, ctx->dest_id, NULL, sock);
868 silc_free(ctx->dest_id);
869 silc_server_disconnect_remote(server, sock, "Server closed connection: "
870 "Authentication failed");
874 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
875 silc_free(sock->user_data);
876 sock->user_data = (void *)id_entry;
877 sock->type = SILC_SOCKET_TYPE_ROUTER;
878 server->id_entry->router = id_entry;
879 server->router = id_entry;
880 idata = (SilcIDListData)sock->user_data;
881 idata->registered = TRUE;
883 /* Perform keepalive. The `hb_context' will be freed automatically
884 when finally calling the silc_socket_free function. XXX hardcoded
886 hb_context = silc_calloc(1, sizeof(*hb_context));
887 hb_context->server = server;
888 silc_socket_set_heartbeat(sock, 600, hb_context,
889 silc_server_perform_heartbeat,
892 /* Register re-key timeout */
893 idata->rekey->timeout = 3600; /* XXX hardcoded */
894 idata->rekey->context = (void *)server;
895 silc_schedule_task_add(server->schedule, sock->sock,
896 silc_server_rekey_callback,
897 (void *)sock, idata->rekey->timeout, 0,
898 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
900 /* If we are router then announce our possible servers. */
901 if (server->server_type == SILC_ROUTER)
902 silc_server_announce_servers(server);
904 /* Announce our clients and channels to the router */
905 silc_server_announce_clients(server);
906 silc_server_announce_channels(server);
909 /* Free the temporary connection data context */
911 silc_free(sconn->remote_host);
915 /* Free the protocol object */
916 silc_protocol_free(protocol);
918 silc_packet_context_free(ctx->packet);
920 silc_ske_free(ctx->ske);
922 sock->protocol = NULL;
925 /* Host lookup callbcak that is called after the incoming connection's
926 IP and FQDN lookup is performed. This will actually check the acceptance
927 of the incoming connection and will register the key exchange protocol
928 for this connection. */
931 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
934 SilcServer server = (SilcServer)context;
935 SilcServerKEInternalContext *proto_ctx;
936 void *cconfig, *sconfig, *rconfig;
937 SilcServerConfigSectionDenyConnection *deny;
940 SILC_LOG_DEBUG(("Start"));
942 /* Check whether we could resolve both IP and FQDN. */
943 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
944 server->params->require_reverse_mapping)) {
945 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
946 sock->hostname ? sock->hostname :
947 sock->ip ? sock->ip : ""));
948 server->stat.conn_failures++;
949 silc_server_disconnect_remote(server, sock,
950 "Server closed connection: Unknown host");
954 /* Register the connection for network input and output. This sets
955 that scheduler will listen for incoming packets for this connection
956 and sets that outgoing packets may be sent to this connection as well.
957 However, this doesn't set the scheduler for outgoing traffic, it
958 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
959 later when outgoing data is available. */
960 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
962 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
965 port = server->sockets[server->sock]->port; /* Listenning port */
967 /* Check whether this connection is denied to connect to us. */
968 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
970 deny = silc_server_config_denied_conn(server->config, sock->hostname,
973 /* The connection is denied */
974 SILC_LOG_INFO(("Connection %s (%s) is denied",
975 sock->hostname, sock->ip));
976 silc_server_disconnect_remote(server, sock, deny->comment ?
978 "Server closed connection: "
979 "Connection refused");
980 server->stat.conn_failures++;
984 /* Check whether we have configred this sort of connection at all. We
985 have to check all configurations since we don't know what type of
986 connection this is. */
987 if (!(cconfig = silc_server_config_find_client_conn(server->config,
989 cconfig = silc_server_config_find_client_conn(server->config,
992 if (!(sconfig = silc_server_config_find_server_conn(server->config,
995 sconfig = silc_server_config_find_server_conn(server->config,
998 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1000 rconfig = silc_server_config_find_router_conn(server->config,
1003 if (!cconfig && !sconfig && !rconfig) {
1004 silc_server_disconnect_remote(server, sock,
1005 "Server closed connection: "
1006 "Connection refused");
1007 server->stat.conn_failures++;
1011 /* The connection is allowed */
1013 /* Allocate internal context for key exchange protocol. This is
1014 sent as context for the protocol. */
1015 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1016 proto_ctx->server = context;
1017 proto_ctx->sock = sock;
1018 proto_ctx->rng = server->rng;
1019 proto_ctx->responder = TRUE;
1020 proto_ctx->cconfig = cconfig;
1021 proto_ctx->sconfig = sconfig;
1022 proto_ctx->rconfig = rconfig;
1024 /* Prepare the connection for key exchange protocol. We allocate the
1025 protocol but will not start it yet. The connector will be the
1026 initiator of the protocol thus we will wait for initiation from
1027 there before we start the protocol. */
1028 server->stat.auth_attempts++;
1029 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1030 &sock->protocol, proto_ctx,
1031 silc_server_accept_new_connection_second);
1033 /* Register a timeout task that will be executed if the connector
1034 will not start the key exchange protocol within 60 seconds. For
1035 now, this is a hard coded limit. After 60 secs the connection will
1036 be closed if the key exchange protocol has not been started. */
1037 proto_ctx->timeout_task =
1038 silc_schedule_task_add(server->schedule, sock->sock,
1039 silc_server_timeout_remote,
1045 /* Accepts new connections to the server. Accepting new connections are
1046 done in three parts to make it async. */
1048 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1050 SilcServer server = (SilcServer)context;
1051 SilcSocketConnection newsocket;
1054 SILC_LOG_DEBUG(("Accepting new connection"));
1056 server->stat.conn_attempts++;
1058 sock = silc_net_accept_connection(server->sock);
1060 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1061 server->stat.conn_failures++;
1065 /* Check max connections */
1066 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1067 SILC_LOG_ERROR(("Refusing connection, server is full"));
1068 server->stat.conn_failures++;
1072 /* Set socket options */
1073 silc_net_set_socket_nonblock(sock);
1074 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1076 /* We don't create a ID yet, since we don't know what type of connection
1077 this is yet. But, we do add the connection to the socket table. */
1078 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1079 server->sockets[sock] = newsocket;
1081 /* Perform asynchronous host lookup. This will lookup the IP and the
1082 FQDN of the remote connection. After the lookup is done the connection
1083 is accepted further. */
1084 silc_socket_host_lookup(newsocket, TRUE,
1085 silc_server_accept_new_connection_lookup, context,
1089 /* Second part of accepting new connection. Key exchange protocol has been
1090 performed and now it is time to do little connection authentication
1091 protocol to figure out whether this connection is client or server
1092 and whether it has right to access this server (especially server
1093 connections needs to be authenticated). */
1095 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1097 SilcProtocol protocol = (SilcProtocol)context;
1098 SilcServerKEInternalContext *ctx =
1099 (SilcServerKEInternalContext *)protocol->context;
1100 SilcServer server = (SilcServer)ctx->server;
1101 SilcSocketConnection sock = ctx->sock;
1102 SilcServerConnAuthInternalContext *proto_ctx;
1104 SILC_LOG_DEBUG(("Start"));
1106 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1107 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1108 /* Error occured during protocol */
1109 silc_protocol_free(protocol);
1110 sock->protocol = NULL;
1111 silc_ske_free_key_material(ctx->keymat);
1113 silc_packet_context_free(ctx->packet);
1115 silc_ske_free(ctx->ske);
1117 silc_free(ctx->dest_id);
1119 silc_schedule_task_del_by_callback(server->schedule,
1120 silc_server_failure_callback);
1121 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1122 "Key exchange failed");
1123 server->stat.auth_failures++;
1127 /* We now have the key material as the result of the key exchange
1128 protocol. Take the key material into use. Free the raw key material
1129 as soon as we've set them into use. */
1130 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1131 ctx->ske->prop->cipher,
1132 ctx->ske->prop->pkcs,
1133 ctx->ske->prop->hash,
1134 ctx->ske->prop->hmac,
1135 ctx->ske->prop->group,
1137 silc_protocol_free(protocol);
1138 sock->protocol = NULL;
1139 silc_ske_free_key_material(ctx->keymat);
1141 silc_packet_context_free(ctx->packet);
1143 silc_ske_free(ctx->ske);
1145 silc_free(ctx->dest_id);
1147 silc_schedule_task_del_by_callback(server->schedule,
1148 silc_server_failure_callback);
1149 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1150 "Key exchange failed");
1151 server->stat.auth_failures++;
1154 silc_ske_free_key_material(ctx->keymat);
1156 /* Allocate internal context for the authentication protocol. This
1157 is sent as context for the protocol. */
1158 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1159 proto_ctx->server = (void *)server;
1160 proto_ctx->sock = sock;
1161 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1162 proto_ctx->responder = TRUE;
1163 proto_ctx->dest_id_type = ctx->dest_id_type;
1164 proto_ctx->dest_id = ctx->dest_id;
1165 proto_ctx->cconfig = ctx->cconfig;
1166 proto_ctx->sconfig = ctx->sconfig;
1167 proto_ctx->rconfig = ctx->rconfig;
1169 /* Free old protocol as it is finished now */
1170 silc_protocol_free(protocol);
1172 silc_packet_context_free(ctx->packet);
1174 sock->protocol = NULL;
1176 /* Allocate the authentication protocol. This is allocated here
1177 but we won't start it yet. We will be receiving party of this
1178 protocol thus we will wait that connecting party will make
1179 their first move. */
1180 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1181 &sock->protocol, proto_ctx,
1182 silc_server_accept_new_connection_final);
1184 /* Register timeout task. If the protocol is not executed inside
1185 this timelimit the connection will be terminated. Currently
1186 this is 60 seconds and is hard coded limit (XXX). */
1187 proto_ctx->timeout_task =
1188 silc_schedule_task_add(server->schedule, sock->sock,
1189 silc_server_timeout_remote,
1190 (void *)server, 60, 0,
1195 /* Final part of accepting new connection. The connection has now
1196 been authenticated and keys has been exchanged. We also know whether
1197 this is client or server connection. */
1199 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1201 SilcProtocol protocol = (SilcProtocol)context;
1202 SilcServerConnAuthInternalContext *ctx =
1203 (SilcServerConnAuthInternalContext *)protocol->context;
1204 SilcServer server = (SilcServer)ctx->server;
1205 SilcSocketConnection sock = ctx->sock;
1206 SilcServerHBContext hb_context;
1207 void *id_entry = NULL;
1209 SILC_LOG_DEBUG(("Start"));
1211 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1212 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1213 /* Error occured during protocol */
1214 silc_protocol_free(protocol);
1215 sock->protocol = NULL;
1217 silc_packet_context_free(ctx->packet);
1219 silc_ske_free(ctx->ske);
1221 silc_free(ctx->dest_id);
1224 sock->protocol = NULL;
1225 silc_schedule_task_del_by_callback(server->schedule,
1226 silc_server_failure_callback);
1227 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1228 "Authentication failed");
1229 server->stat.auth_failures++;
1233 switch(ctx->conn_type) {
1234 case SILC_SOCKET_TYPE_CLIENT:
1236 SilcClientEntry client;
1238 SILC_LOG_DEBUG(("Remote host is client"));
1239 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1242 /* Add the client to the client ID cache. The nickname and Client ID
1243 and other information is created after we have received NEW_CLIENT
1244 packet from client. */
1245 client = silc_idlist_add_client(server->local_list,
1246 NULL, NULL, NULL, NULL, NULL, sock);
1248 SILC_LOG_ERROR(("Could not add new client to cache"));
1249 silc_free(sock->user_data);
1250 silc_server_disconnect_remote(server, sock,
1251 "Server closed connection: "
1252 "Authentication failed");
1253 server->stat.auth_failures++;
1258 server->stat.my_clients++;
1259 server->stat.clients++;
1260 if (server->server_type == SILC_ROUTER)
1261 server->stat.cell_clients++;
1263 id_entry = (void *)client;
1266 case SILC_SOCKET_TYPE_SERVER:
1267 case SILC_SOCKET_TYPE_ROUTER:
1269 SilcServerEntry new_server;
1270 SilcServerConfigSectionServerConnection *conn =
1271 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1272 ctx->sconfig : ctx->rconfig;
1274 SILC_LOG_DEBUG(("Remote host is %s",
1275 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1276 "server" : "router"));
1277 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1278 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1279 "server" : "router"));
1281 /* Add the server into server cache. The server name and Server ID
1282 is updated after we have received NEW_SERVER packet from the
1283 server. We mark ourselves as router for this server if we really
1286 silc_idlist_add_server(server->local_list, NULL,
1287 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1288 SILC_SERVER : SILC_ROUTER, NULL,
1289 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1290 server->id_entry : NULL, sock);
1292 SILC_LOG_ERROR(("Could not add new server to cache"));
1293 silc_free(sock->user_data);
1294 silc_server_disconnect_remote(server, sock,
1295 "Server closed connection: "
1296 "Authentication failed");
1297 server->stat.auth_failures++;
1302 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1303 server->stat.my_servers++;
1305 server->stat.my_routers++;
1306 server->stat.servers++;
1308 id_entry = (void *)new_server;
1310 /* Check whether this connection is to be our primary router connection
1311 if we dont' already have the primary route. */
1312 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1313 if (silc_server_config_is_primary_route(server->config) &&
1317 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1318 server->standalone = FALSE;
1319 if (!server->id_entry->router) {
1320 server->id_entry->router = id_entry;
1321 server->router = id_entry;
1331 sock->type = ctx->conn_type;
1333 /* Add the common data structure to the ID entry. */
1335 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1337 /* Add to sockets internal pointer for fast referencing */
1338 silc_free(sock->user_data);
1339 sock->user_data = id_entry;
1341 /* Connection has been fully established now. Everything is ok. */
1342 SILC_LOG_DEBUG(("New connection authenticated"));
1344 /* Perform keepalive. The `hb_context' will be freed automatically
1345 when finally calling the silc_socket_free function. XXX hardcoded
1347 hb_context = silc_calloc(1, sizeof(*hb_context));
1348 hb_context->server = server;
1349 silc_socket_set_heartbeat(sock, 600, hb_context,
1350 silc_server_perform_heartbeat,
1354 silc_schedule_task_del_by_callback(server->schedule,
1355 silc_server_failure_callback);
1356 silc_protocol_free(protocol);
1358 silc_packet_context_free(ctx->packet);
1360 silc_ske_free(ctx->ske);
1362 silc_free(ctx->dest_id);
1364 sock->protocol = NULL;
1367 /* This function is used to read packets from network and send packets to
1368 network. This is usually a generic task. */
1370 SILC_TASK_CALLBACK(silc_server_packet_process)
1372 SilcServer server = (SilcServer)context;
1373 SilcSocketConnection sock = server->sockets[fd];
1374 SilcIDListData idata;
1375 SilcCipher cipher = NULL;
1376 SilcHmac hmac = NULL;
1382 SILC_LOG_DEBUG(("Processing packet"));
1384 /* Packet sending */
1386 if (type == SILC_TASK_WRITE) {
1387 /* Do not send data to disconnected connection */
1388 if (SILC_IS_DISCONNECTED(sock))
1391 server->stat.packets_sent++;
1393 if (sock->outbuf->data - sock->outbuf->head)
1394 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1396 /* Send the packet */
1397 ret = silc_packet_send(sock, TRUE);
1399 /* If returned -2 could not write to connection now, will do
1405 SILC_LOG_ERROR(("Error sending packet to connection "
1406 "%s:%d [%s]", sock->hostname, sock->port,
1407 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1408 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1409 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1414 /* The packet has been sent and now it is time to set the connection
1415 back to only for input. When there is again some outgoing data
1416 available for this connection it will be set for output as well.
1417 This call clears the output setting and sets it only for input. */
1418 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1419 SILC_UNSET_OUTBUF_PENDING(sock);
1421 silc_buffer_clear(sock->outbuf);
1425 /* Packet receiving */
1427 /* Read some data from connection */
1428 ret = silc_packet_receive(sock);
1432 SILC_LOG_ERROR(("Error receiving packet from connection "
1433 "%s:%d [%s]", sock->hostname, sock->port,
1434 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1435 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1436 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1443 SILC_LOG_DEBUG(("Read EOF"));
1445 /* If connection is disconnecting already we will finally
1446 close the connection */
1447 if (SILC_IS_DISCONNECTING(sock)) {
1448 if (sock->user_data)
1449 silc_server_free_sock_user_data(server, sock);
1450 silc_server_close_connection(server, sock);
1454 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1455 SILC_SET_DISCONNECTING(sock);
1457 /* If the closed connection was our primary router connection the
1458 start re-connecting phase. */
1459 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1460 sock == server->router->connection)
1461 silc_schedule_task_add(server->schedule, 0,
1462 silc_server_connect_to_router,
1465 SILC_TASK_PRI_NORMAL);
1467 if (sock->user_data)
1468 silc_server_free_sock_user_data(server, sock);
1469 silc_server_close_connection(server, sock);
1473 /* If connection is disconnecting or disconnected we will ignore
1475 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1476 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1480 server->stat.packets_received++;
1482 /* Get keys and stuff from ID entry */
1483 idata = (SilcIDListData)sock->user_data;
1485 idata->last_receive = time(NULL);
1486 cipher = idata->receive_key;
1487 hmac = idata->hmac_receive;
1490 /* Process the packet. This will call the parser that will then
1491 decrypt and parse the packet. */
1492 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1496 /* Callback function that the silc_packet_decrypt will call to make the
1497 decision whether the packet is normal or special packet. We will
1498 return TRUE if it is normal and FALSE if it is special */
1500 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1502 SilcPacketContext *packet,
1505 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1506 SilcServer server = (SilcServer)parse_ctx->context;
1508 /* Packet is normal packet, if:
1510 1) packet is private message packet and does not have private key set
1511 2) is other packet than channel message packet
1512 3) is channel message packet and remote is router and we are router
1514 all other packets are special packets
1517 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1518 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1521 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1522 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1523 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1524 server->server_type == SILC_ROUTER))
1530 /* Parses whole packet, received earlier. */
1532 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1534 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1535 SilcServer server = (SilcServer)parse_ctx->context;
1536 SilcSocketConnection sock = parse_ctx->sock;
1537 SilcPacketContext *packet = parse_ctx->packet;
1538 SilcIDListData idata = (SilcIDListData)sock->user_data;
1541 SILC_LOG_DEBUG(("Start"));
1543 /* Decrypt the received packet */
1544 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1545 idata ? idata->hmac_receive : NULL,
1546 packet->buffer, packet,
1547 silc_server_packet_decrypt_check, parse_ctx);
1549 SILC_LOG_WARNING(("Packet decryption failed for connection "
1550 "%s:%d [%s]", sock->hostname, sock->port,
1551 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1552 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1553 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1559 /* Parse the packet. Packet type is returned. */
1560 ret = silc_packet_parse(packet);
1562 /* Parse the packet header in special way as this is "special"
1564 ret = silc_packet_parse_special(packet);
1567 if (ret == SILC_PACKET_NONE)
1570 /* Check that the the current client ID is same as in the client's packet. */
1571 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1572 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1573 if (client && client->id) {
1574 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1575 packet->src_id_type);
1576 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1584 if (server->server_type == SILC_ROUTER) {
1585 /* Route the packet if it is not destined to us. Other ID types but
1586 server are handled separately after processing them. */
1587 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1588 packet->dst_id_type == SILC_ID_SERVER &&
1589 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1590 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1592 /* Route the packet to fastest route for the destination ID */
1593 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1594 packet->dst_id_type);
1597 silc_server_packet_route(server,
1598 silc_server_route_get(server, id,
1599 packet->dst_id_type),
1606 /* Parse the incoming packet type */
1607 silc_server_packet_parse_type(server, sock, packet);
1609 if (server->server_type == SILC_ROUTER) {
1610 /* Broadcast packet if it is marked as broadcast packet and it is
1611 originated from router and we are router. */
1612 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1613 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1614 !server->standalone) {
1615 silc_server_packet_broadcast(server, server->router->connection, packet);
1620 /* silc_buffer_clear(sock->inbuf); */
1621 silc_packet_context_free(packet);
1622 silc_free(parse_ctx);
1625 /* Parser callback called by silc_packet_receive_process. This merely
1626 registers timeout that will handle the actual parsing when appropriate. */
1628 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1630 SilcServer server = (SilcServer)parser_context->context;
1631 SilcSocketConnection sock = parser_context->sock;
1633 switch (sock->type) {
1634 case SILC_SOCKET_TYPE_UNKNOWN:
1635 case SILC_SOCKET_TYPE_CLIENT:
1636 /* Parse the packet with timeout */
1637 silc_schedule_task_add(server->schedule, sock->sock,
1638 silc_server_packet_parse_real,
1639 (void *)parser_context, 0, 100000,
1641 SILC_TASK_PRI_NORMAL);
1643 case SILC_SOCKET_TYPE_SERVER:
1644 case SILC_SOCKET_TYPE_ROUTER:
1645 /* Packets from servers are parsed as soon as possible */
1646 silc_schedule_task_add(server->schedule, sock->sock,
1647 silc_server_packet_parse_real,
1648 (void *)parser_context, 0, 1,
1650 SILC_TASK_PRI_NORMAL);
1657 /* Parses the packet type and calls what ever routines the packet type
1658 requires. This is done for all incoming packets. */
1660 void silc_server_packet_parse_type(SilcServer server,
1661 SilcSocketConnection sock,
1662 SilcPacketContext *packet)
1664 SilcPacketType type = packet->type;
1666 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1668 /* Parse the packet type */
1670 case SILC_PACKET_DISCONNECT:
1671 SILC_LOG_DEBUG(("Disconnect packet"));
1672 if (packet->flags & SILC_PACKET_FLAG_LIST)
1676 case SILC_PACKET_SUCCESS:
1678 * Success received for something. For now we can have only
1679 * one protocol for connection executing at once hence this
1680 * success message is for whatever protocol is executing currently.
1682 SILC_LOG_DEBUG(("Success packet"));
1683 if (packet->flags & SILC_PACKET_FLAG_LIST)
1686 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1689 case SILC_PACKET_FAILURE:
1691 * Failure received for something. For now we can have only
1692 * one protocol for connection executing at once hence this
1693 * failure message is for whatever protocol is executing currently.
1695 SILC_LOG_DEBUG(("Failure packet"));
1696 if (packet->flags & SILC_PACKET_FLAG_LIST)
1698 if (sock->protocol) {
1699 SilcServerFailureContext f;
1700 f = silc_calloc(1, sizeof(*f));
1704 /* We will wait 5 seconds to process this failure packet */
1705 silc_schedule_task_add(server->schedule, sock->sock,
1706 silc_server_failure_callback, (void *)f, 5, 0,
1707 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1711 case SILC_PACKET_REJECT:
1712 SILC_LOG_DEBUG(("Reject packet"));
1713 if (packet->flags & SILC_PACKET_FLAG_LIST)
1718 case SILC_PACKET_NOTIFY:
1720 * Received notify packet. Server can receive notify packets from
1721 * router. Server then relays the notify messages to clients if needed.
1723 SILC_LOG_DEBUG(("Notify packet"));
1724 if (packet->flags & SILC_PACKET_FLAG_LIST)
1725 silc_server_notify_list(server, sock, packet);
1727 silc_server_notify(server, sock, packet);
1733 case SILC_PACKET_CHANNEL_MESSAGE:
1735 * Received channel message. Channel messages are special packets
1736 * (although probably most common ones) thus they are handled
1739 SILC_LOG_DEBUG(("Channel Message packet"));
1740 if (packet->flags & SILC_PACKET_FLAG_LIST)
1742 silc_server_channel_message(server, sock, packet);
1745 case SILC_PACKET_CHANNEL_KEY:
1747 * Received key for channel. As channels are created by the router
1748 * the keys are as well. We will distribute the key to all of our
1749 * locally connected clients on the particular channel. Router
1750 * never receives this channel and thus is ignored.
1752 SILC_LOG_DEBUG(("Channel Key packet"));
1753 if (packet->flags & SILC_PACKET_FLAG_LIST)
1755 silc_server_channel_key(server, sock, packet);
1761 case SILC_PACKET_COMMAND:
1763 * Recived command. Processes the command request and allocates the
1764 * command context and calls the command.
1766 SILC_LOG_DEBUG(("Command packet"));
1767 if (packet->flags & SILC_PACKET_FLAG_LIST)
1769 silc_server_command_process(server, sock, packet);
1772 case SILC_PACKET_COMMAND_REPLY:
1774 * Received command reply packet. Received command reply to command. It
1775 * may be reply to command sent by us or reply to command sent by client
1776 * that we've routed further.
1778 SILC_LOG_DEBUG(("Command Reply packet"));
1779 if (packet->flags & SILC_PACKET_FLAG_LIST)
1781 silc_server_command_reply(server, sock, packet);
1785 * Private Message packets
1787 case SILC_PACKET_PRIVATE_MESSAGE:
1789 * Received private message packet. The packet is coming from either
1792 SILC_LOG_DEBUG(("Private Message packet"));
1793 if (packet->flags & SILC_PACKET_FLAG_LIST)
1795 silc_server_private_message(server, sock, packet);
1798 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1800 * Private message key packet.
1802 if (packet->flags & SILC_PACKET_FLAG_LIST)
1804 silc_server_private_message_key(server, sock, packet);
1808 * Key Exchange protocol packets
1810 case SILC_PACKET_KEY_EXCHANGE:
1811 SILC_LOG_DEBUG(("KE packet"));
1812 if (packet->flags & SILC_PACKET_FLAG_LIST)
1815 if (sock->protocol && sock->protocol->protocol &&
1816 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1818 SilcServerKEInternalContext *proto_ctx =
1819 (SilcServerKEInternalContext *)sock->protocol->context;
1821 proto_ctx->packet = silc_packet_context_dup(packet);
1823 /* Let the protocol handle the packet */
1824 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1826 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1827 "protocol active, packet dropped."));
1831 case SILC_PACKET_KEY_EXCHANGE_1:
1832 SILC_LOG_DEBUG(("KE 1 packet"));
1833 if (packet->flags & SILC_PACKET_FLAG_LIST)
1836 if (sock->protocol && sock->protocol->protocol &&
1837 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1838 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1840 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1841 SilcServerRekeyInternalContext *proto_ctx =
1842 (SilcServerRekeyInternalContext *)sock->protocol->context;
1844 if (proto_ctx->packet)
1845 silc_packet_context_free(proto_ctx->packet);
1847 proto_ctx->packet = silc_packet_context_dup(packet);
1849 /* Let the protocol handle the packet */
1850 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1852 SilcServerKEInternalContext *proto_ctx =
1853 (SilcServerKEInternalContext *)sock->protocol->context;
1855 if (proto_ctx->packet)
1856 silc_packet_context_free(proto_ctx->packet);
1858 proto_ctx->packet = silc_packet_context_dup(packet);
1859 proto_ctx->dest_id_type = packet->src_id_type;
1860 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1861 packet->src_id_type);
1862 if (!proto_ctx->dest_id)
1865 /* Let the protocol handle the packet */
1866 silc_protocol_execute(sock->protocol, server->schedule,
1870 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1871 "protocol active, packet dropped."));
1875 case SILC_PACKET_KEY_EXCHANGE_2:
1876 SILC_LOG_DEBUG(("KE 2 packet"));
1877 if (packet->flags & SILC_PACKET_FLAG_LIST)
1880 if (sock->protocol && sock->protocol->protocol &&
1881 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1882 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1884 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1885 SilcServerRekeyInternalContext *proto_ctx =
1886 (SilcServerRekeyInternalContext *)sock->protocol->context;
1888 if (proto_ctx->packet)
1889 silc_packet_context_free(proto_ctx->packet);
1891 proto_ctx->packet = silc_packet_context_dup(packet);
1893 /* Let the protocol handle the packet */
1894 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1896 SilcServerKEInternalContext *proto_ctx =
1897 (SilcServerKEInternalContext *)sock->protocol->context;
1899 if (proto_ctx->packet)
1900 silc_packet_context_free(proto_ctx->packet);
1902 proto_ctx->packet = silc_packet_context_dup(packet);
1903 proto_ctx->dest_id_type = packet->src_id_type;
1904 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1905 packet->src_id_type);
1906 if (!proto_ctx->dest_id)
1909 /* Let the protocol handle the packet */
1910 silc_protocol_execute(sock->protocol, server->schedule,
1914 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1915 "protocol active, packet dropped."));
1919 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1921 * Connection authentication request packet. When we receive this packet
1922 * we will send to the other end information about our mandatory
1923 * authentication method for the connection. This packet maybe received
1926 SILC_LOG_DEBUG(("Connection authentication request packet"));
1927 if (packet->flags & SILC_PACKET_FLAG_LIST)
1929 silc_server_connection_auth_request(server, sock, packet);
1933 * Connection Authentication protocol packets
1935 case SILC_PACKET_CONNECTION_AUTH:
1936 /* Start of the authentication protocol. We receive here the
1937 authentication data and will verify it. */
1938 SILC_LOG_DEBUG(("Connection auth packet"));
1939 if (packet->flags & SILC_PACKET_FLAG_LIST)
1942 if (sock->protocol && sock->protocol->protocol->type
1943 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1945 SilcServerConnAuthInternalContext *proto_ctx =
1946 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1948 proto_ctx->packet = silc_packet_context_dup(packet);
1950 /* Let the protocol handle the packet */
1951 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1953 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1954 "protocol active, packet dropped."));
1958 case SILC_PACKET_NEW_ID:
1960 * Received New ID packet. This includes some new ID that has been
1961 * created. It may be for client, server or channel. This is the way
1962 * to distribute information about new registered entities in the
1965 SILC_LOG_DEBUG(("New ID packet"));
1966 if (packet->flags & SILC_PACKET_FLAG_LIST)
1967 silc_server_new_id_list(server, sock, packet);
1969 silc_server_new_id(server, sock, packet);
1972 case SILC_PACKET_NEW_CLIENT:
1974 * Received new client packet. This includes client information that
1975 * we will use to create initial client ID. After creating new
1976 * ID we will send it to the client.
1978 SILC_LOG_DEBUG(("New Client packet"));
1979 if (packet->flags & SILC_PACKET_FLAG_LIST)
1981 silc_server_new_client(server, sock, packet);
1984 case SILC_PACKET_NEW_SERVER:
1986 * Received new server packet. This includes Server ID and some other
1987 * information that we may save. This is received after server has
1990 SILC_LOG_DEBUG(("New Server packet"));
1991 if (packet->flags & SILC_PACKET_FLAG_LIST)
1993 silc_server_new_server(server, sock, packet);
1996 case SILC_PACKET_NEW_CHANNEL:
1998 * Received new channel packet. Information about new channel in the
1999 * network are distributed using this packet.
2001 SILC_LOG_DEBUG(("New Channel packet"));
2002 if (packet->flags & SILC_PACKET_FLAG_LIST)
2003 silc_server_new_channel_list(server, sock, packet);
2005 silc_server_new_channel(server, sock, packet);
2008 case SILC_PACKET_HEARTBEAT:
2010 * Received heartbeat.
2012 SILC_LOG_DEBUG(("Heartbeat packet"));
2013 if (packet->flags & SILC_PACKET_FLAG_LIST)
2017 case SILC_PACKET_KEY_AGREEMENT:
2019 * Received heartbeat.
2021 SILC_LOG_DEBUG(("Key agreement packet"));
2022 if (packet->flags & SILC_PACKET_FLAG_LIST)
2024 silc_server_key_agreement(server, sock, packet);
2027 case SILC_PACKET_REKEY:
2029 * Received re-key packet. The sender wants to regenerate the session
2032 SILC_LOG_DEBUG(("Re-key packet"));
2033 if (packet->flags & SILC_PACKET_FLAG_LIST)
2035 silc_server_rekey(server, sock, packet);
2038 case SILC_PACKET_REKEY_DONE:
2040 * The re-key is done.
2042 SILC_LOG_DEBUG(("Re-key done packet"));
2043 if (packet->flags & SILC_PACKET_FLAG_LIST)
2046 if (sock->protocol && sock->protocol->protocol &&
2047 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2049 SilcServerRekeyInternalContext *proto_ctx =
2050 (SilcServerRekeyInternalContext *)sock->protocol->context;
2052 if (proto_ctx->packet)
2053 silc_packet_context_free(proto_ctx->packet);
2055 proto_ctx->packet = silc_packet_context_dup(packet);
2057 /* Let the protocol handle the packet */
2058 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2060 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2061 "protocol active, packet dropped."));
2066 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2072 /* Creates connection to a remote router. */
2074 void silc_server_create_connection(SilcServer server,
2075 char *remote_host, uint32 port)
2077 SilcServerConnection sconn;
2079 /* Allocate connection object for hold connection specific stuff. */
2080 sconn = silc_calloc(1, sizeof(*sconn));
2081 sconn->server = server;
2082 sconn->remote_host = strdup(remote_host);
2083 sconn->remote_port = port;
2085 silc_schedule_task_add(server->schedule, 0,
2086 silc_server_connect_router,
2087 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2088 SILC_TASK_PRI_NORMAL);
2091 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2093 silc_socket_free((SilcSocketConnection)context);
2096 /* Closes connection to socket connection */
2098 void silc_server_close_connection(SilcServer server,
2099 SilcSocketConnection sock)
2101 /* If sock->user_data is NULL then we'll check for active protocols
2102 here since the silc_server_free_sock_user_data has not been called
2103 for this connection. */
2104 if (!sock->user_data) {
2105 /* If any protocol is active cancel its execution */
2106 if (sock->protocol) {
2107 silc_protocol_cancel(sock->protocol, server->schedule);
2108 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2109 silc_protocol_execute_final(sock->protocol, server->schedule);
2110 sock->protocol = NULL;
2114 /* We won't listen for this connection anymore */
2115 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2117 /* Unregister all tasks */
2118 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2119 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2121 /* Close the actual connection */
2122 silc_net_close_connection(sock->sock);
2123 server->sockets[sock->sock] = NULL;
2125 silc_schedule_task_add(server->schedule, 0,
2126 silc_server_close_connection_final,
2127 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2128 SILC_TASK_PRI_NORMAL);
2131 /* Sends disconnect message to remote connection and disconnects the
2134 void silc_server_disconnect_remote(SilcServer server,
2135 SilcSocketConnection sock,
2136 const char *fmt, ...)
2139 unsigned char buf[4096];
2144 memset(buf, 0, sizeof(buf));
2146 vsprintf(buf, fmt, ap);
2149 SILC_LOG_DEBUG(("Disconnecting remote host"));
2151 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2153 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2154 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2155 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2158 /* Notify remote end that the conversation is over. The notify message
2159 is tried to be sent immediately. */
2160 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2161 buf, strlen(buf), TRUE);
2163 /* Mark the connection to be disconnected */
2164 SILC_SET_DISCONNECTED(sock);
2165 silc_server_close_connection(server, sock);
2170 SilcClientEntry client;
2171 } *FreeClientInternal;
2173 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2175 FreeClientInternal i = (FreeClientInternal)context;
2177 silc_idlist_del_data(i->client);
2178 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2182 /* Frees client data and notifies about client's signoff. */
2184 void silc_server_free_client_data(SilcServer server,
2185 SilcSocketConnection sock,
2186 SilcClientEntry client,
2190 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2192 /* If there is pending outgoing data for the client then purge it
2193 to the network before removing the client entry. */
2194 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2195 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2196 server->stat.packets_sent++;
2198 if (sock->outbuf->data - sock->outbuf->head)
2199 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2201 silc_packet_send(sock, TRUE);
2203 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2204 SILC_UNSET_OUTBUF_PENDING(sock);
2205 silc_buffer_clear(sock->outbuf);
2208 /* Send SIGNOFF notify to routers. */
2209 if (notify && !server->standalone && server->router)
2210 silc_server_send_notify_signoff(server, server->router->connection,
2211 server->server_type == SILC_SERVER ?
2212 FALSE : TRUE, client->id, signoff);
2214 /* Remove client from all channels */
2216 silc_server_remove_from_channels(server, NULL, client,
2217 TRUE, signoff, TRUE);
2219 silc_server_remove_from_channels(server, NULL, client,
2220 FALSE, NULL, FALSE);
2222 /* We will not delete the client entry right away. We will take it
2223 into history (for WHOWAS command) for 5 minutes */
2226 silc_schedule_task_add(server->schedule, 0,
2227 silc_server_free_client_data_timeout,
2229 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2230 client->data.registered = FALSE;
2232 /* Free the client entry and everything in it */
2233 server->stat.my_clients--;
2234 server->stat.clients--;
2235 if (server->server_type == SILC_ROUTER)
2236 server->stat.cell_clients--;
2239 /* Frees user_data pointer from socket connection object. This also sends
2240 appropriate notify packets to the network to inform about leaving
2243 void silc_server_free_sock_user_data(SilcServer server,
2244 SilcSocketConnection sock)
2246 SILC_LOG_DEBUG(("Start"));
2248 switch(sock->type) {
2249 case SILC_SOCKET_TYPE_CLIENT:
2251 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2252 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2255 case SILC_SOCKET_TYPE_SERVER:
2256 case SILC_SOCKET_TYPE_ROUTER:
2258 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2260 /* Free all client entries that this server owns as they will
2261 become invalid now as well. */
2263 silc_server_remove_clients_by_server(server, user_data, TRUE);
2265 /* If this was our primary router connection then we're lost to
2266 the outside world. */
2267 if (server->router == user_data) {
2268 server->id_entry->router = NULL;
2269 server->router = NULL;
2270 server->standalone = TRUE;
2273 /* Free the server entry */
2274 silc_idlist_del_data(user_data);
2275 silc_idlist_del_server(server->local_list, user_data);
2276 server->stat.my_servers--;
2277 server->stat.servers--;
2278 if (server->server_type == SILC_ROUTER)
2279 server->stat.cell_servers--;
2284 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2286 silc_idlist_del_data(user_data);
2287 silc_free(user_data);
2292 /* If any protocol is active cancel its execution */
2293 if (sock->protocol) {
2294 silc_protocol_cancel(sock->protocol, server->schedule);
2295 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2296 silc_protocol_execute_final(sock->protocol, server->schedule);
2297 sock->protocol = NULL;
2300 sock->user_data = NULL;
2303 /* Removes the client from channels and possibly removes the channels
2304 as well. After removing those channels that exist, their channel
2305 keys are regnerated. This is called only by the function
2306 silc_server_remove_clients_by_server. */
2308 static void silc_server_remove_clients_channels(SilcServer server,
2309 SilcSocketConnection sock,
2310 SilcClientEntry client,
2311 SilcHashTable channels)
2313 SilcChannelEntry channel;
2314 SilcChannelClientEntry chl;
2315 SilcHashTableList htl;
2318 SILC_LOG_DEBUG(("Start"));
2320 if (!client || !client->id)
2323 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2325 /* Remove the client from all channels. The client is removed from
2326 the channels' user list. */
2327 silc_hash_table_list(client->channels, &htl);
2328 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2329 channel = chl->channel;
2331 /* Remove channel from client's channel list */
2332 silc_hash_table_del(client->channels, channel);
2334 /* Remove channel if there is no users anymore */
2335 if (server->server_type == SILC_ROUTER &&
2336 silc_hash_table_count(channel->user_list) < 2) {
2338 if (silc_hash_table_find(channels, channel, NULL, NULL))
2339 silc_hash_table_del(channels, channel);
2342 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2344 if (!silc_idlist_del_channel(server->local_list, channel))
2345 silc_idlist_del_channel(server->global_list, channel);
2346 server->stat.my_channels--;
2350 /* Remove client from channel's client list */
2351 silc_hash_table_del(channel->user_list, chl->client);
2353 server->stat.my_chanclients--;
2355 /* If there is no global users on the channel anymore mark the channel
2356 as local channel. Do not check if the removed client is local client. */
2357 if (server->server_type == SILC_SERVER && channel->global_users &&
2358 chl->client->router && !silc_server_channel_has_global(channel))
2359 channel->global_users = FALSE;
2361 /* If there is not at least one local user on the channel then we don't
2362 need the channel entry anymore, we can remove it safely. */
2363 if (server->server_type == SILC_SERVER &&
2364 !silc_server_channel_has_local(channel)) {
2366 if (silc_hash_table_find(channels, channel, NULL, NULL))
2367 silc_hash_table_del(channels, channel);
2370 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2372 if (channel->founder_key) {
2373 /* The founder auth data exists, do not remove the channel entry */
2374 SilcChannelClientEntry chl2;
2375 SilcHashTableList htl2;
2379 silc_hash_table_list(channel->user_list, &htl2);
2380 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2381 silc_hash_table_del(chl2->client->channels, channel);
2382 silc_hash_table_del(channel->user_list, chl2->client);
2388 /* Remove the channel entry */
2389 if (!silc_idlist_del_channel(server->local_list, channel))
2390 silc_idlist_del_channel(server->global_list, channel);
2391 server->stat.my_channels--;
2395 /* Add the channel to the the channels list to regenerate the
2397 if (!silc_hash_table_find(channels, channel, NULL, NULL))
2398 silc_hash_table_add(channels, channel, channel);
2401 silc_buffer_free(clidp);
2404 /* This function is used to remove all client entries by the server `entry'.
2405 This is called when the connection is lost to the server. In this case
2406 we must invalidate all the client entries owned by the server `entry'.
2407 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2408 distributed to our local clients. */
2410 int silc_server_remove_clients_by_server(SilcServer server,
2411 SilcServerEntry entry,
2414 SilcIDCacheList list = NULL;
2415 SilcIDCacheEntry id_cache = NULL;
2416 SilcClientEntry client = NULL;
2418 SilcClientEntry *clients = NULL;
2419 uint32 clients_c = 0;
2420 unsigned char **argv = NULL;
2421 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2422 SilcHashTableList htl;
2423 SilcChannelEntry channel;
2424 SilcHashTable channels;
2427 SILC_LOG_DEBUG(("Start"));
2429 /* Allocate the hash table that holds the channels that require
2430 channel key re-generation after we've removed this server's clients
2431 from the channels. */
2432 channels = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
2435 if (server_signoff) {
2436 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2437 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2438 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2439 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2440 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2441 memcpy(argv[argc], idp->data, idp->len);
2442 argv_lens[argc] = idp->len;
2443 argv_types[argc] = argc + 1;
2445 silc_buffer_free(idp);
2448 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2450 if (silc_idcache_list_first(list, &id_cache)) {
2452 client = (SilcClientEntry)id_cache->context;
2453 if (client->data.registered == FALSE) {
2454 if (!silc_idcache_list_next(list, &id_cache))
2460 if (client->router != entry) {
2461 if (server_signoff && client->connection) {
2462 clients = silc_realloc(clients,
2463 sizeof(*clients) * (clients_c + 1));
2464 clients[clients_c] = client;
2468 if (!silc_idcache_list_next(list, &id_cache))
2474 if (server_signoff) {
2475 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2476 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2477 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2479 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2481 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2482 memcpy(argv[argc], idp->data, idp->len);
2483 argv_lens[argc] = idp->len;
2484 argv_types[argc] = argc + 1;
2486 silc_buffer_free(idp);
2489 /* Remove the client entry */
2490 silc_server_remove_clients_channels(server, NULL, client, channels);
2491 silc_idlist_del_client(server->local_list, client);
2493 if (!silc_idcache_list_next(list, &id_cache))
2497 silc_idcache_list_free(list);
2500 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2502 if (silc_idcache_list_first(list, &id_cache)) {
2504 client = (SilcClientEntry)id_cache->context;
2505 if (client->data.registered == FALSE) {
2506 if (!silc_idcache_list_next(list, &id_cache))
2512 if (client->router != entry) {
2513 if (server_signoff && client->connection) {
2514 clients = silc_realloc(clients,
2515 sizeof(*clients) * (clients_c + 1));
2516 clients[clients_c] = client;
2520 if (!silc_idcache_list_next(list, &id_cache))
2526 if (server_signoff) {
2527 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2528 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2529 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2531 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2533 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2534 memcpy(argv[argc], idp->data, idp->len);
2535 argv_lens[argc] = idp->len;
2536 argv_types[argc] = argc + 1;
2538 silc_buffer_free(idp);
2541 /* Remove the client entry */
2542 silc_server_remove_clients_channels(server, NULL, client, channels);
2543 silc_idlist_del_client(server->global_list, client);
2545 if (!silc_idcache_list_next(list, &id_cache))
2549 silc_idcache_list_free(list);
2552 /* Send the SERVER_SIGNOFF notify */
2553 if (server_signoff) {
2556 /* Send SERVER_SIGNOFF notify to our primary router */
2557 if (!server->standalone && server->router &&
2558 server->router != entry) {
2559 args = silc_argument_payload_encode(1, argv, argv_lens,
2561 silc_server_send_notify_args(server,
2562 server->router->connection,
2563 server->server_type == SILC_SERVER ?
2565 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2567 silc_buffer_free(args);
2570 args = silc_argument_payload_encode(argc, argv, argv_lens,
2572 /* Send to local clients */
2573 for (i = 0; i < clients_c; i++) {
2574 silc_server_send_notify_args(server, clients[i]->connection,
2575 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2580 silc_buffer_free(args);
2581 for (i = 0; i < argc; i++)
2584 silc_free(argv_lens);
2585 silc_free(argv_types);
2588 /* We must now re-generate the channel key for all channels that had
2589 this server's client(s) on the channel. As they left the channel we
2590 must re-generate the channel key. */
2591 silc_hash_table_list(channels, &htl);
2592 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
2593 silc_server_create_channel_key(server, channel, 0);
2594 silc_server_send_channel_key(server, NULL, channel,
2595 server->server_type == SILC_ROUTER ?
2596 FALSE : !server->standalone);
2598 silc_hash_table_free(channels);
2603 /* Checks whether given channel has global users. If it does this returns
2604 TRUE and FALSE if there is only locally connected clients on the channel. */
2606 int silc_server_channel_has_global(SilcChannelEntry channel)
2608 SilcChannelClientEntry chl;
2609 SilcHashTableList htl;
2611 silc_hash_table_list(channel->user_list, &htl);
2612 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2613 if (chl->client->router)
2620 /* Checks whether given channel has locally connected users. If it does this
2621 returns TRUE and FALSE if there is not one locally connected client. */
2623 int silc_server_channel_has_local(SilcChannelEntry channel)
2625 SilcChannelClientEntry chl;
2626 SilcHashTableList htl;
2628 silc_hash_table_list(channel->user_list, &htl);
2629 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2630 if (!chl->client->router)
2637 /* Removes client from all channels it has joined. This is used when client
2638 connection is disconnected. If the client on a channel is last, the
2639 channel is removed as well. This sends the SIGNOFF notify types. */
2641 void silc_server_remove_from_channels(SilcServer server,
2642 SilcSocketConnection sock,
2643 SilcClientEntry client,
2645 char *signoff_message,
2648 SilcChannelEntry channel;
2649 SilcChannelClientEntry chl;
2650 SilcHashTableList htl;
2653 SILC_LOG_DEBUG(("Start"));
2655 if (!client || !client->id)
2658 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2660 /* Remove the client from all channels. The client is removed from
2661 the channels' user list. */
2662 silc_hash_table_list(client->channels, &htl);
2663 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2664 channel = chl->channel;
2666 /* Remove channel from client's channel list */
2667 silc_hash_table_del(client->channels, channel);
2669 /* Remove channel if there is no users anymore */
2670 if (server->server_type == SILC_ROUTER &&
2671 silc_hash_table_count(channel->user_list) < 2) {
2673 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2674 if (!silc_idlist_del_channel(server->local_list, channel))
2675 silc_idlist_del_channel(server->global_list, channel);
2676 server->stat.my_channels--;
2680 /* Remove client from channel's client list */
2681 silc_hash_table_del(channel->user_list, chl->client);
2683 server->stat.my_chanclients--;
2685 /* If there is no global users on the channel anymore mark the channel
2686 as local channel. Do not check if the removed client is local client. */
2687 if (server->server_type == SILC_SERVER && channel->global_users &&
2688 chl->client->router && !silc_server_channel_has_global(channel))
2689 channel->global_users = FALSE;
2691 /* If there is not at least one local user on the channel then we don't
2692 need the channel entry anymore, we can remove it safely. */
2693 if (server->server_type == SILC_SERVER &&
2694 !silc_server_channel_has_local(channel)) {
2695 /* Notify about leaving client if this channel has global users. */
2696 if (notify && channel->global_users)
2697 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2698 SILC_NOTIFY_TYPE_SIGNOFF,
2699 signoff_message ? 2 : 1,
2700 clidp->data, clidp->len,
2701 signoff_message, signoff_message ?
2702 strlen(signoff_message) : 0);
2705 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2707 if (channel->founder_key) {
2708 /* The founder auth data exists, do not remove the channel entry */
2709 SilcChannelClientEntry chl2;
2710 SilcHashTableList htl2;
2714 silc_hash_table_list(channel->user_list, &htl2);
2715 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2716 silc_hash_table_del(chl2->client->channels, channel);
2717 silc_hash_table_del(channel->user_list, chl2->client);
2723 /* Remove the channel entry */
2724 if (!silc_idlist_del_channel(server->local_list, channel))
2725 silc_idlist_del_channel(server->global_list, channel);
2726 server->stat.my_channels--;
2730 /* Send notify to channel about client leaving SILC and thus
2731 the entire channel. */
2733 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2734 SILC_NOTIFY_TYPE_SIGNOFF,
2735 signoff_message ? 2 : 1,
2736 clidp->data, clidp->len,
2737 signoff_message, signoff_message ?
2738 strlen(signoff_message) : 0);
2740 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2741 /* Re-generate channel key */
2742 silc_server_create_channel_key(server, channel, 0);
2744 /* Send the channel key to the channel. The key of course is not sent
2745 to the client who was removed from the channel. */
2746 silc_server_send_channel_key(server, client->connection, channel,
2747 server->server_type == SILC_ROUTER ?
2748 FALSE : !server->standalone);
2752 silc_buffer_free(clidp);
2755 /* Removes client from one channel. This is used for example when client
2756 calls LEAVE command to remove itself from the channel. Returns TRUE
2757 if channel still exists and FALSE if the channel is removed when
2758 last client leaves the channel. If `notify' is FALSE notify messages
2761 int silc_server_remove_from_one_channel(SilcServer server,
2762 SilcSocketConnection sock,
2763 SilcChannelEntry channel,
2764 SilcClientEntry client,
2767 SilcChannelClientEntry chl;
2770 SILC_LOG_DEBUG(("Start"));
2772 /* Get the entry to the channel, if this client is not on the channel
2774 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2777 /* Remove the client from the channel. The client is removed from
2778 the channel's user list. */
2780 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2782 /* Remove channel from client's channel list */
2783 silc_hash_table_del(client->channels, chl->channel);
2785 /* Remove channel if there is no users anymore */
2786 if (server->server_type == SILC_ROUTER &&
2787 silc_hash_table_count(channel->user_list) < 2) {
2789 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2790 if (!silc_idlist_del_channel(server->local_list, channel))
2791 silc_idlist_del_channel(server->global_list, channel);
2792 silc_buffer_free(clidp);
2793 server->stat.my_channels--;
2797 /* Remove client from channel's client list */
2798 silc_hash_table_del(channel->user_list, chl->client);
2800 server->stat.my_chanclients--;
2802 /* If there is no global users on the channel anymore mark the channel
2803 as local channel. Do not check if the client is local client. */
2804 if (server->server_type == SILC_SERVER && channel->global_users &&
2805 chl->client->router && !silc_server_channel_has_global(channel))
2806 channel->global_users = FALSE;
2808 /* If there is not at least one local user on the channel then we don't
2809 need the channel entry anymore, we can remove it safely. */
2810 if (server->server_type == SILC_SERVER &&
2811 !silc_server_channel_has_local(channel)) {
2812 /* Notify about leaving client if this channel has global users. */
2813 if (notify && channel->global_users)
2814 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2815 SILC_NOTIFY_TYPE_LEAVE, 1,
2816 clidp->data, clidp->len);
2818 silc_buffer_free(clidp);
2821 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2823 if (channel->founder_key) {
2824 /* The founder auth data exists, do not remove the channel entry */
2825 SilcChannelClientEntry chl2;
2826 SilcHashTableList htl2;
2830 silc_hash_table_list(channel->user_list, &htl2);
2831 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2832 silc_hash_table_del(chl2->client->channels, channel);
2833 silc_hash_table_del(channel->user_list, chl2->client);
2839 /* Remove the channel entry */
2840 if (!silc_idlist_del_channel(server->local_list, channel))
2841 silc_idlist_del_channel(server->global_list, channel);
2842 server->stat.my_channels--;
2846 /* Send notify to channel about client leaving the channel */
2848 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2849 SILC_NOTIFY_TYPE_LEAVE, 1,
2850 clidp->data, clidp->len);
2852 silc_buffer_free(clidp);
2856 /* Returns TRUE if the given client is on the channel. FALSE if not.
2857 This works because we assure that the user list on the channel is
2858 always in up to date thus we can only check the channel list from
2859 `client' which is faster than checking the user list from `channel'. */
2861 int silc_server_client_on_channel(SilcClientEntry client,
2862 SilcChannelEntry channel)
2864 if (!client || !channel)
2867 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2873 /* Timeout callback. This is called if connection is idle or for some
2874 other reason is not responding within some period of time. This
2875 disconnects the remote end. */
2877 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2879 SilcServer server = (SilcServer)context;
2880 SilcSocketConnection sock = server->sockets[fd];
2882 SILC_LOG_DEBUG(("Start"));
2887 /* If we have protocol active we must assure that we call the protocol's
2888 final callback so that all the memory is freed. */
2889 if (sock->protocol) {
2890 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2891 silc_protocol_execute_final(sock->protocol, server->schedule);
2895 if (sock->user_data)
2896 silc_server_free_sock_user_data(server, sock);
2898 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2899 "Connection timeout");
2902 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2903 function may be used only by router. In real SILC network all channels
2904 are created by routers thus this function is never used by normal
2907 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2908 SilcServerID *router_id,
2914 SilcChannelID *channel_id;
2915 SilcChannelEntry entry;
2919 SILC_LOG_DEBUG(("Creating new channel"));
2922 cipher = "aes-256-cbc";
2924 hmac = "hmac-sha1-96";
2926 /* Allocate cipher */
2927 if (!silc_cipher_alloc(cipher, &key))
2931 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2932 silc_cipher_free(key);
2936 channel_name = strdup(channel_name);
2938 /* Create the channel */
2939 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2940 entry = silc_idlist_add_channel(server->local_list, channel_name,
2941 SILC_CHANNEL_MODE_NONE, channel_id,
2942 NULL, key, newhmac);
2944 silc_free(channel_name);
2945 silc_cipher_free(key);
2946 silc_hmac_free(newhmac);
2950 entry->cipher = strdup(cipher);
2951 entry->hmac_name = strdup(hmac);
2953 /* Now create the actual key material */
2954 silc_server_create_channel_key(server, entry,
2955 silc_cipher_get_key_len(key) / 8);
2957 /* Notify other routers about the new channel. We send the packet
2958 to our primary route. */
2959 if (broadcast && server->standalone == FALSE)
2960 silc_server_send_new_channel(server, server->router->connection, TRUE,
2961 channel_name, entry->id,
2962 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2965 server->stat.my_channels++;
2970 /* Same as above but creates the channel with Channel ID `channel_id. */
2973 silc_server_create_new_channel_with_id(SilcServer server,
2977 SilcChannelID *channel_id,
2980 SilcChannelEntry entry;
2984 SILC_LOG_DEBUG(("Creating new channel"));
2987 cipher = "aes-256-cbc";
2989 hmac = "hmac-sha1-96";
2991 /* Allocate cipher */
2992 if (!silc_cipher_alloc(cipher, &key))
2996 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2997 silc_cipher_free(key);
3001 channel_name = strdup(channel_name);
3003 /* Create the channel */
3004 entry = silc_idlist_add_channel(server->local_list, channel_name,
3005 SILC_CHANNEL_MODE_NONE, channel_id,
3006 NULL, key, newhmac);
3008 silc_free(channel_name);
3012 /* Now create the actual key material */
3013 silc_server_create_channel_key(server, entry,
3014 silc_cipher_get_key_len(key) / 8);
3016 /* Notify other routers about the new channel. We send the packet
3017 to our primary route. */
3018 if (broadcast && server->standalone == FALSE)
3019 silc_server_send_new_channel(server, server->router->connection, TRUE,
3020 channel_name, entry->id,
3021 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3024 server->stat.my_channels++;
3029 /* Channel's key re-key timeout callback. */
3031 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3033 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3034 SilcServer server = (SilcServer)rekey->context;
3036 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
3037 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3039 silc_schedule_task_add(server->schedule, 0,
3040 silc_server_channel_key_rekey,
3041 (void *)rekey, 3600, 0,
3043 SILC_TASK_PRI_NORMAL);
3046 /* Generates new channel key. This is used to create the initial channel key
3047 but also to re-generate new key for channel. If `key_len' is provided
3048 it is the bytes of the key length. */
3050 void silc_server_create_channel_key(SilcServer server,
3051 SilcChannelEntry channel,
3055 unsigned char channel_key[32], hash[32];
3058 SILC_LOG_DEBUG(("Generating channel key"));
3060 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3061 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3065 if (!channel->channel_key)
3066 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
3071 else if (channel->key_len)
3072 len = channel->key_len / 8;
3074 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3076 /* Create channel key */
3077 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3080 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3082 /* Remove old key if exists */
3084 memset(channel->key, 0, channel->key_len / 8);
3085 silc_free(channel->key);
3089 channel->key_len = len * 8;
3090 channel->key = silc_calloc(len, sizeof(*channel->key));
3091 memcpy(channel->key, channel_key, len);
3092 memset(channel_key, 0, sizeof(channel_key));
3094 /* Generate HMAC key from the channel key data and set it */
3096 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3097 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
3098 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3099 memset(hash, 0, sizeof(hash));
3101 if (server->server_type == SILC_ROUTER) {
3102 if (!channel->rekey)
3103 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3104 channel->rekey->context = (void *)server;
3105 channel->rekey->channel = channel;
3106 channel->rekey->key_len = key_len;
3108 silc_schedule_task_del_by_callback(server->schedule,
3109 silc_server_channel_key_rekey);
3110 silc_schedule_task_add(server->schedule, 0,
3111 silc_server_channel_key_rekey,
3112 (void *)channel->rekey, 3600, 0,
3114 SILC_TASK_PRI_NORMAL);
3118 /* Saves the channel key found in the encoded `key_payload' buffer. This
3119 function is used when we receive Channel Key Payload and also when we're
3120 processing JOIN command reply. Returns entry to the channel. */
3122 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3123 SilcBuffer key_payload,
3124 SilcChannelEntry channel)
3126 SilcChannelKeyPayload payload = NULL;
3127 SilcChannelID *id = NULL;
3128 unsigned char *tmp, hash[32];
3132 SILC_LOG_DEBUG(("Start"));
3134 /* Decode channel key payload */
3135 payload = silc_channel_key_payload_parse(key_payload);
3137 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
3142 /* Get the channel entry */
3145 /* Get channel ID */
3146 tmp = silc_channel_key_get_id(payload, &tmp_len);
3147 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3153 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3155 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3157 SILC_LOG_ERROR(("Received key for non-existent channel"));
3163 tmp = silc_channel_key_get_key(payload, &tmp_len);
3169 cipher = silc_channel_key_get_cipher(payload, NULL);
3175 /* Remove old key if exists */
3177 memset(channel->key, 0, channel->key_len / 8);
3178 silc_free(channel->key);
3179 silc_cipher_free(channel->channel_key);
3182 /* Create new cipher */
3183 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3188 if (channel->cipher)
3189 silc_free(channel->cipher);
3190 channel->cipher = strdup(cipher);
3193 channel->key_len = tmp_len * 8;
3194 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3195 memcpy(channel->key, tmp, tmp_len);
3196 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3198 /* Generate HMAC key from the channel key data and set it */
3200 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3201 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3202 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3204 memset(hash, 0, sizeof(hash));
3205 memset(tmp, 0, tmp_len);
3207 if (server->server_type == SILC_ROUTER) {
3208 if (!channel->rekey)
3209 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3210 channel->rekey->context = (void *)server;
3211 channel->rekey->channel = channel;
3213 silc_schedule_task_del_by_callback(server->schedule,
3214 silc_server_channel_key_rekey);
3215 silc_schedule_task_add(server->schedule, 0,
3216 silc_server_channel_key_rekey,
3217 (void *)channel->rekey, 3600, 0,
3219 SILC_TASK_PRI_NORMAL);
3226 silc_channel_key_payload_free(payload);
3231 /* Heartbeat callback. This function is set as argument for the
3232 silc_socket_set_heartbeat function. The library will call this function
3233 at the set time interval. */
3235 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3238 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3240 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3243 /* Send the heartbeat */
3244 silc_server_send_heartbeat(hb->server, sock);
3247 /* Returns assembled of all servers in the given ID list. The packet's
3248 form is dictated by the New ID payload. */
3250 static void silc_server_announce_get_servers(SilcServer server,
3252 SilcBuffer *servers)
3254 SilcIDCacheList list;
3255 SilcIDCacheEntry id_cache;
3256 SilcServerEntry entry;
3259 /* Go through all clients in the list */
3260 if (silc_idcache_get_all(id_list->servers, &list)) {
3261 if (silc_idcache_list_first(list, &id_cache)) {
3263 entry = (SilcServerEntry)id_cache->context;
3265 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3267 *servers = silc_buffer_realloc(*servers,
3269 (*servers)->truelen + idp->len :
3271 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3272 silc_buffer_put(*servers, idp->data, idp->len);
3273 silc_buffer_pull(*servers, idp->len);
3274 silc_buffer_free(idp);
3276 if (!silc_idcache_list_next(list, &id_cache))
3281 silc_idcache_list_free(list);
3285 /* This function is used by router to announce existing servers to our
3286 primary router when we've connected to it. */
3288 void silc_server_announce_servers(SilcServer server)
3290 SilcBuffer servers = NULL;
3292 SILC_LOG_DEBUG(("Announcing servers"));
3294 /* Get servers in local list */
3295 silc_server_announce_get_servers(server, server->local_list, &servers);
3297 /* Get servers in global list */
3298 silc_server_announce_get_servers(server, server->global_list, &servers);
3301 silc_buffer_push(servers, servers->data - servers->head);
3302 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3304 /* Send the packet */
3305 silc_server_packet_send(server, server->router->connection,
3306 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3307 servers->data, servers->len, TRUE);
3309 silc_buffer_free(servers);
3313 /* Returns assembled packet of all clients in the given ID list. The
3314 packet's form is dictated by the New ID Payload. */
3316 static void silc_server_announce_get_clients(SilcServer server,
3318 SilcBuffer *clients)
3320 SilcIDCacheList list;
3321 SilcIDCacheEntry id_cache;
3322 SilcClientEntry client;
3325 /* Go through all clients in the list */
3326 if (silc_idcache_get_all(id_list->clients, &list)) {
3327 if (silc_idcache_list_first(list, &id_cache)) {
3329 client = (SilcClientEntry)id_cache->context;
3331 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3333 *clients = silc_buffer_realloc(*clients,
3335 (*clients)->truelen + idp->len :
3337 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3338 silc_buffer_put(*clients, idp->data, idp->len);
3339 silc_buffer_pull(*clients, idp->len);
3340 silc_buffer_free(idp);
3342 if (!silc_idcache_list_next(list, &id_cache))
3347 silc_idcache_list_free(list);
3351 /* This function is used to announce our existing clients to our router
3352 when we've connected to it. */
3354 void silc_server_announce_clients(SilcServer server)
3356 SilcBuffer clients = NULL;
3358 SILC_LOG_DEBUG(("Announcing clients"));
3360 /* Get clients in local list */
3361 silc_server_announce_get_clients(server, server->local_list,
3364 /* As router we announce our global list as well */
3365 if (server->server_type == SILC_ROUTER)
3366 silc_server_announce_get_clients(server, server->global_list,
3370 silc_buffer_push(clients, clients->data - clients->head);
3371 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3373 /* Send the packet */
3374 silc_server_packet_send(server, server->router->connection,
3375 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3376 clients->data, clients->len, TRUE);
3378 silc_buffer_free(clients);
3383 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3389 p = silc_notify_payload_encode(notify, argc, ap);
3395 /* Returns assembled packets for channel users of the `channel'. */
3397 void silc_server_announce_get_channel_users(SilcServer server,
3398 SilcChannelEntry channel,
3399 SilcBuffer *channel_users,
3400 SilcBuffer *channel_users_modes)
3402 SilcChannelClientEntry chl;
3403 SilcHashTableList htl;
3404 SilcBuffer chidp, clidp;
3407 unsigned char mode[4];
3409 SILC_LOG_DEBUG(("Start"));
3411 /* Now find all users on the channel */
3412 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3413 silc_hash_table_list(channel->user_list, &htl);
3414 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3415 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3418 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3419 clidp->data, clidp->len,
3420 chidp->data, chidp->len);
3423 silc_buffer_realloc(*channel_users,
3425 (*channel_users)->truelen + len : len));
3426 silc_buffer_pull_tail(*channel_users,
3427 ((*channel_users)->end -
3428 (*channel_users)->data));
3430 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3431 silc_buffer_pull(*channel_users, len);
3432 silc_buffer_free(tmp);
3434 /* CUMODE notify for mode change on the channel */
3435 SILC_PUT32_MSB(chl->mode, mode);
3436 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3437 3, clidp->data, clidp->len,
3439 clidp->data, clidp->len);
3441 *channel_users_modes =
3442 silc_buffer_realloc(*channel_users_modes,
3443 (*channel_users_modes ?
3444 (*channel_users_modes)->truelen + len : len));
3445 silc_buffer_pull_tail(*channel_users_modes,
3446 ((*channel_users_modes)->end -
3447 (*channel_users_modes)->data));
3449 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3450 silc_buffer_pull(*channel_users_modes, len);
3451 silc_buffer_free(tmp);
3453 silc_buffer_free(clidp);
3455 silc_buffer_free(chidp);
3458 /* Returns assembled packets for all channels and users on those channels
3459 from the given ID List. The packets are in the form dictated by the
3460 New Channel and New Channel User payloads. */
3462 void silc_server_announce_get_channels(SilcServer server,
3464 SilcBuffer *channels,
3465 SilcBuffer *channel_users,
3466 SilcBuffer **channel_users_modes,
3467 uint32 *channel_users_modes_c,
3468 SilcChannelID ***channel_ids)
3470 SilcIDCacheList list;
3471 SilcIDCacheEntry id_cache;
3472 SilcChannelEntry channel;
3477 int i = *channel_users_modes_c;
3479 SILC_LOG_DEBUG(("Start"));
3481 /* Go through all channels in the list */
3482 if (silc_idcache_get_all(id_list->channels, &list)) {
3483 if (silc_idcache_list_first(list, &id_cache)) {
3485 channel = (SilcChannelEntry)id_cache->context;
3487 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3488 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3489 name_len = strlen(channel->channel_name);
3491 len = 4 + name_len + id_len + 4;
3493 silc_buffer_realloc(*channels,
3494 (*channels ? (*channels)->truelen + len : len));
3495 silc_buffer_pull_tail(*channels,
3496 ((*channels)->end - (*channels)->data));
3497 silc_buffer_format(*channels,
3498 SILC_STR_UI_SHORT(name_len),
3499 SILC_STR_UI_XNSTRING(channel->channel_name,
3501 SILC_STR_UI_SHORT(id_len),
3502 SILC_STR_UI_XNSTRING(cid, id_len),
3503 SILC_STR_UI_INT(channel->mode),
3505 silc_buffer_pull(*channels, len);
3507 *channel_users_modes = silc_realloc(*channel_users_modes,
3508 sizeof(**channel_users_modes) *
3510 (*channel_users_modes)[i] = NULL;
3511 *channel_ids = silc_realloc(*channel_ids,
3512 sizeof(**channel_ids) * (i + 1));
3513 (*channel_ids)[i] = NULL;
3514 silc_server_announce_get_channel_users(server, channel,
3516 channel_users_modes[i]);
3517 (*channel_ids)[i] = channel->id;
3520 if (!silc_idcache_list_next(list, &id_cache))
3524 *channel_users_modes_c += i;
3527 silc_idcache_list_free(list);
3531 /* This function is used to announce our existing channels to our router
3532 when we've connected to it. This also announces the users on the
3533 channels to the router. */
3535 void silc_server_announce_channels(SilcServer server)
3537 SilcBuffer channels = NULL, channel_users = NULL;
3538 SilcBuffer *channel_users_modes = NULL;
3539 uint32 channel_users_modes_c = 0;
3540 SilcChannelID **channel_ids = NULL;
3542 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3544 /* Get channels and channel users in local list */
3545 silc_server_announce_get_channels(server, server->local_list,
3546 &channels, &channel_users,
3547 &channel_users_modes,
3548 &channel_users_modes_c,
3551 /* Get channels and channel users in global list */
3552 silc_server_announce_get_channels(server, server->global_list,
3553 &channels, &channel_users,
3554 &channel_users_modes,
3555 &channel_users_modes_c,
3559 silc_buffer_push(channels, channels->data - channels->head);
3560 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3562 /* Send the packet */
3563 silc_server_packet_send(server, server->router->connection,
3564 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3565 channels->data, channels->len,
3568 silc_buffer_free(channels);
3571 if (channel_users) {
3572 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3573 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3574 channel_users->len);
3576 /* Send the packet */
3577 silc_server_packet_send(server, server->router->connection,
3578 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3579 channel_users->data, channel_users->len,
3582 silc_buffer_free(channel_users);
3585 if (channel_users_modes) {
3588 for (i = 0; i < channel_users_modes_c; i++) {
3589 silc_buffer_push(channel_users_modes[i],
3590 channel_users_modes[i]->data -
3591 channel_users_modes[i]->head);
3592 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3593 channel_users_modes[i]->len);
3594 silc_server_packet_send_dest(server, server->router->connection,
3595 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3596 channel_ids[i], SILC_ID_CHANNEL,
3597 channel_users_modes[i]->data,
3598 channel_users_modes[i]->len,
3600 silc_buffer_free(channel_users_modes[i]);
3602 silc_free(channel_users_modes);
3603 silc_free(channel_ids);
3607 /* Failure timeout callback. If this is called then we will immediately
3608 process the received failure. We always process the failure with timeout
3609 since we do not want to blindly trust to received failure packets.
3610 This won't be called (the timeout is cancelled) if the failure was
3611 bogus (it is bogus if remote does not close the connection after sending
3614 SILC_TASK_CALLBACK(silc_server_failure_callback)
3616 SilcServerFailureContext f = (SilcServerFailureContext)context;
3618 if (f->sock->protocol) {
3619 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3620 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3626 /* Assembles user list and users mode list from the `channel'. */
3628 void silc_server_get_users_on_channel(SilcServer server,
3629 SilcChannelEntry channel,
3630 SilcBuffer *user_list,
3631 SilcBuffer *mode_list,
3634 SilcChannelClientEntry chl;
3635 SilcHashTableList htl;
3636 SilcBuffer client_id_list;
3637 SilcBuffer client_mode_list;
3639 uint32 list_count = 0, len = 0;
3641 silc_hash_table_list(channel->user_list, &htl);
3642 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3643 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3645 client_id_list = silc_buffer_alloc(len);
3647 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3648 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3649 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3651 silc_hash_table_list(channel->user_list, &htl);
3652 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3654 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3655 silc_buffer_put(client_id_list, idp->data, idp->len);
3656 silc_buffer_pull(client_id_list, idp->len);
3657 silc_buffer_free(idp);
3659 /* Client's mode on channel */
3660 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3661 silc_buffer_pull(client_mode_list, 4);
3665 silc_buffer_push(client_id_list,
3666 client_id_list->data - client_id_list->head);
3667 silc_buffer_push(client_mode_list,
3668 client_mode_list->data - client_mode_list->head);
3670 *user_list = client_id_list;
3671 *mode_list = client_mode_list;
3672 *user_count = list_count;
3675 /* Saves users and their modes to the `channel'. */
3677 void silc_server_save_users_on_channel(SilcServer server,
3678 SilcSocketConnection sock,
3679 SilcChannelEntry channel,
3680 SilcClientID *noadd,
3681 SilcBuffer user_list,
3682 SilcBuffer mode_list,
3687 /* Cache the received Client ID's and modes. This cache expires
3688 whenever server sends notify message to channel. It means two things;
3689 some user has joined or leaved the channel. XXX TODO! */
3690 for (i = 0; i < user_count; i++) {
3693 SilcClientID *client_id;
3694 SilcClientEntry client;
3697 SILC_GET16_MSB(idp_len, user_list->data + 2);
3699 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3700 silc_buffer_pull(user_list, idp_len);
3705 SILC_GET32_MSB(mode, mode_list->data);
3706 silc_buffer_pull(mode_list, 4);
3708 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3709 silc_free(client_id);
3713 /* Check if we have this client cached already. */
3714 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3717 client = silc_idlist_find_client_by_id(server->global_list,
3720 /* If router did not find such Client ID in its lists then this must
3721 be bogus client or some router in the net is buggy. */
3722 if (server->server_type == SILC_ROUTER) {
3723 silc_free(client_id);
3727 /* We don't have that client anywhere, add it. The client is added
3728 to global list since server didn't have it in the lists so it must be
3730 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3731 silc_id_dup(client_id, SILC_ID_CLIENT),
3732 sock->user_data, NULL);
3734 silc_free(client_id);
3738 client->data.registered = TRUE;
3741 silc_free(client_id);
3743 if (!silc_server_client_on_channel(client, channel)) {
3744 /* Client was not on the channel, add it. */
3745 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3746 chl->client = client;
3748 chl->channel = channel;
3749 silc_hash_table_add(channel->user_list, chl->client, chl);
3750 silc_hash_table_add(client->channels, chl->channel, chl);
3755 /* Lookups route to the client indicated by the `id_data'. The connection
3756 object and internal data object is returned. Returns NULL if route
3757 could not be found to the client. If the `client_id' is specified then
3758 it is used and the `id_data' is ignored. */
3760 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3761 unsigned char *id_data,
3763 SilcClientID *client_id,
3764 SilcIDListData *idata)
3767 SilcClientEntry client;
3769 SILC_LOG_DEBUG(("Start"));
3771 /* Decode destination Client ID */
3773 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3775 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3779 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3782 /* If the destination belongs to our server we don't have to route
3783 the packet anywhere but to send it to the local destination. */
3784 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3788 if (client->data.registered == FALSE)
3791 /* If we are router and the client has router then the client is in
3792 our cell but not directly connected to us. */
3793 if (server->server_type == SILC_ROUTER && client->router) {
3794 /* We are of course in this case the client's router thus the route
3795 to the client is the server who owns the client. So, we will send
3796 the packet to that server. */
3798 *idata = (SilcIDListData)client->router;
3799 return client->router->connection;
3802 /* Seems that client really is directly connected to us */
3804 *idata = (SilcIDListData)client;
3805 return client->connection;
3808 /* Destination belongs to someone not in this server. If we are normal
3809 server our action is to send the packet to our router. */
3810 if (server->server_type == SILC_SERVER && !server->standalone) {
3813 *idata = (SilcIDListData)server->router;
3814 return server->router->connection;
3817 /* We are router and we will perform route lookup for the destination
3818 and send the packet to fastest route. */
3819 if (server->server_type == SILC_ROUTER && !server->standalone) {
3820 /* Check first that the ID is valid */
3821 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3823 SilcSocketConnection dst_sock;
3825 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3829 *idata = (SilcIDListData)dst_sock->user_data;
3838 /* Encodes and returns channel list of channels the `client' has joined.
3839 Secret channels are not put to the list. */
3841 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3842 SilcClientEntry client)
3844 SilcBuffer buffer = NULL;
3845 SilcChannelEntry channel;
3846 SilcChannelClientEntry chl;
3847 SilcHashTableList htl;
3853 silc_hash_table_list(client->channels, &htl);
3854 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3855 channel = chl->channel;
3857 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3860 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3861 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3862 name_len = strlen(channel->channel_name);
3864 len = 4 + name_len + id_len + 4;
3865 buffer = silc_buffer_realloc(buffer,
3866 (buffer ? (buffer)->truelen + len : len));
3867 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3868 silc_buffer_format(buffer,
3869 SILC_STR_UI_SHORT(name_len),
3870 SILC_STR_UI_XNSTRING(channel->channel_name,
3872 SILC_STR_UI_SHORT(id_len),
3873 SILC_STR_UI_XNSTRING(cid, id_len),
3874 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3876 silc_buffer_pull(buffer, len);
3881 silc_buffer_push(buffer, buffer->data - buffer->head);
3886 /* Finds client entry by Client ID and if it is not found then resolves
3887 it using WHOIS command. */
3889 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3890 SilcClientID *client_id)
3892 SilcClientEntry client;
3894 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3896 client = silc_idlist_find_client_by_id(server->global_list,
3898 if (!client && server->server_type == SILC_ROUTER)
3902 if (!client && server->standalone)
3905 if (!client || !client->nickname || !client->username) {
3906 SilcBuffer buffer, idp;
3908 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3909 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3910 ++server->cmd_ident, 1,
3911 3, idp->data, idp->len);
3912 silc_server_packet_send(server, client ? client->router->connection :
3913 server->router->connection,
3914 SILC_PACKET_COMMAND, 0,
3915 buffer->data, buffer->len, FALSE);
3916 silc_buffer_free(idp);
3917 silc_buffer_free(buffer);
3924 /* A timeout callback for the re-key. We will be the initiator of the
3927 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3929 SilcSocketConnection sock = (SilcSocketConnection)context;
3930 SilcIDListData idata = (SilcIDListData)sock->user_data;
3931 SilcServer server = (SilcServer)idata->rekey->context;
3932 SilcProtocol protocol;
3933 SilcServerRekeyInternalContext *proto_ctx;
3935 SILC_LOG_DEBUG(("Start"));
3937 /* Allocate internal protocol context. This is sent as context
3939 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3940 proto_ctx->server = (void *)server;
3941 proto_ctx->sock = sock;
3942 proto_ctx->responder = FALSE;
3943 proto_ctx->pfs = idata->rekey->pfs;
3945 /* Perform rekey protocol. Will call the final callback after the
3946 protocol is over. */
3947 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3948 &protocol, proto_ctx, silc_server_rekey_final);
3949 sock->protocol = protocol;
3951 /* Run the protocol */
3952 silc_protocol_execute(protocol, server->schedule, 0, 0);
3954 /* Re-register re-key timeout */
3955 silc_schedule_task_add(server->schedule, sock->sock,
3956 silc_server_rekey_callback,
3957 context, idata->rekey->timeout, 0,
3958 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3961 /* The final callback for the REKEY protocol. This will actually take the
3962 new key material into use. */
3964 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3966 SilcProtocol protocol = (SilcProtocol)context;
3967 SilcServerRekeyInternalContext *ctx =
3968 (SilcServerRekeyInternalContext *)protocol->context;
3969 SilcServer server = (SilcServer)ctx->server;
3970 SilcSocketConnection sock = ctx->sock;
3972 SILC_LOG_DEBUG(("Start"));
3974 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3975 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3976 /* Error occured during protocol */
3977 silc_protocol_cancel(protocol, server->schedule);
3978 silc_protocol_free(protocol);
3979 sock->protocol = NULL;
3981 silc_packet_context_free(ctx->packet);
3983 silc_ske_free(ctx->ske);
3989 silc_protocol_free(protocol);
3990 sock->protocol = NULL;
3992 silc_packet_context_free(ctx->packet);
3994 silc_ske_free(ctx->ske);