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 silc_free(server->local_list);
81 silc_free(server->global_list);
83 silc_rng_free(server->rng);
86 silc_pkcs_free(server->pkcs);
89 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
90 silc_dlist_del(server->sim, sim);
93 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, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
118 SilcServerConfigSectionListenPort *listen;
120 SILC_LOG_DEBUG(("Initializing server"));
122 assert(server->config);
124 /* Set public and private keys */
125 if (!server->config->server_keys ||
126 !server->config->server_keys->public_key ||
127 !server->config->server_keys->private_key) {
128 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
131 server->public_key = server->config->server_keys->public_key;
132 server->private_key = server->config->server_keys->private_key;
134 /* XXX After server is made as Silc Server Library this can be given
135 as argument, for now this is hard coded */
136 server->params = silc_calloc(1, sizeof(*server->params));
137 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
138 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
139 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
140 server->params->retry_keep_trying = FALSE;
141 server->params->protocol_timeout = 60;
142 server->params->require_reverse_mapping = FALSE;
144 /* Set log files where log message should be saved. */
145 server->config->server = server;
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 /* Allocate PKCS context for local public and private keys */
170 silc_pkcs_alloc(server->public_key->name, &server->pkcs);
171 silc_pkcs_public_key_set(server->pkcs, server->public_key);
172 silc_pkcs_private_key_set(server->pkcs, server->private_key);
174 /* Create a listening server. Note that our server can listen on multiple
175 ports. All listeners are created here and now. */
177 listen = server->config->listen_port;
181 tmp = silc_net_create_server(server->config->listen_port->port,
182 server->config->listen_port->listener_ip);
185 SILC_LOG_ERROR(("Could not create server listener: %s on %d",
186 server->config->listen_port->listener_ip,
187 server->config->listen_port->port));
191 sock = silc_realloc(sock, sizeof(*sock) * (sock_count + 1));
192 sock[sock_count] = tmp;
194 listen = listen->next;
197 /* Initialize ID caches */
198 server->local_list->clients =
199 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
200 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
201 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
203 /* These are allocated for normal server as well as these hold some
204 global information that the server has fetched from its router. For
205 router these are used as they are supposed to be used on router. */
206 server->global_list->clients =
207 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
208 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
209 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
211 /* Allocate the entire socket list that is used in server. Eventually
212 all connections will have entry in this table (it is a table of
213 pointers to the actual object that is allocated individually
215 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
216 sizeof(*server->sockets));
218 for (i = 0; i < sock_count; i++) {
219 SilcSocketConnection newsocket = NULL;
221 /* Set socket to non-blocking mode */
222 silc_net_set_socket_nonblock(sock[i]);
223 server->sock = sock[i];
225 /* Add ourselves also to the socket table. The entry allocated above
226 is sent as argument for fast referencing in the future. */
227 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, NULL, &newsocket);
228 server->sockets[sock[i]] = newsocket;
230 /* Perform name and address lookups to resolve the listenning address
232 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
234 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
236 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
237 newsocket->hostname ? newsocket->hostname :
238 newsocket->ip ? newsocket->ip : ""));
239 server->stat.conn_failures++;
242 if (!newsocket->hostname)
243 newsocket->hostname = strdup(newsocket->ip);
245 newsocket->port = silc_net_get_local_port(sock[i]);
247 /* Create a Server ID for the server. */
248 silc_id_create_server_id(newsocket->ip, newsocket->port, server->rng, &id);
253 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
254 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
255 server->id_type = SILC_ID_SERVER;
256 server->server_name = server->config->server_info->server_name;
258 /* Add ourselves to the server list. We don't have a router yet
259 beacuse we haven't established a route yet. It will be done later.
260 For now, NULL is sent as router. This allocates new entry to
263 silc_idlist_add_server(server->local_list,
264 server->config->server_info->server_name,
265 server->server_type, server->id, NULL, NULL);
267 SILC_LOG_ERROR(("Could not add ourselves to cache"));
270 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
272 /* Put the allocated socket pointer also to the entry allocated above
273 for fast back-referencing to the socket list. */
274 newsocket->user_data = (void *)id_entry;
275 id_entry->connection = (void *)newsocket;
276 server->id_entry = id_entry;
279 /* Register protocols */
280 silc_server_protocols_register();
282 /* Initialize the scheduler. */
283 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
284 if (!server->schedule)
287 /* Add the first task to the scheduler. This is task that is executed by
288 timeout. It expires as soon as the caller calls silc_server_run. This
289 task performs authentication protocol and key exchange with our
291 silc_schedule_task_add(server->schedule, sock[0],
292 silc_server_connect_to_router,
293 (void *)server, 0, 1,
295 SILC_TASK_PRI_NORMAL);
297 /* Add listener task to the scheduler. This task receives new connections
298 to the server. This task remains on the queue until the end of the
300 silc_schedule_task_add(server->schedule, sock[0],
301 silc_server_accept_new_connection,
302 (void *)server, 0, 0,
304 SILC_TASK_PRI_NORMAL);
305 server->listenning = TRUE;
307 /* Send log file configuration */
308 silc_server_config_setlogfiles(server->config, server->schedule);
310 /* If server connections has been configured then we must be router as
311 normal server cannot have server connections, only router connections. */
312 if (server->config->servers) {
313 SilcServerConfigSectionServerConnection *ptr = server->config->servers;
315 server->server_type = SILC_ROUTER;
317 if (ptr->backup_router) {
318 server->server_type = SILC_BACKUP_ROUTER;
319 server->backup_router = TRUE;
320 server->id_entry->server_type = SILC_BACKUP_ROUTER;
327 /* Register the ID Cache purge task. This periodically purges the ID cache
328 and removes the expired cache entries. */
330 /* Clients local list */
331 purge = silc_calloc(1, sizeof(*purge));
332 purge->cache = server->local_list->clients;
333 purge->schedule = server->schedule;
334 purge->timeout = 600;
335 silc_schedule_task_add(purge->schedule, 0,
337 (void *)purge, purge->timeout, 0,
338 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
340 /* Clients global list */
341 purge = silc_calloc(1, sizeof(*purge));
342 purge->cache = server->global_list->clients;
343 purge->schedule = server->schedule;
344 purge->timeout = 300;
345 silc_schedule_task_add(purge->schedule, 0,
347 (void *)purge, purge->timeout, 0,
348 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
350 SILC_LOG_DEBUG(("Server initialized"));
352 /* We are done here, return succesfully */
356 for (i = 0; i < sock_count; i++)
357 silc_net_close_server(sock[i]);
362 /* Fork server to background */
364 void silc_server_daemonise(SilcServer server)
368 SILC_LOG_DEBUG(("Forking SILC server to background"));
373 SILC_LOG_DEBUG(("fork() failed, cannot proceed"));
378 SILC_LOG_DEBUG(("Server started as user"));
380 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
386 /* Drop root privligies. If this cannot be done, die. */
388 void silc_server_drop(SilcServer server)
390 /* Are we executing silcd as root or a regular user? */
396 if (!server->config->identity || !server->config->identity->user ||
397 !server->config->identity->group) {
398 fprintf(stderr, "Error:"
399 "\tSILC server must not be run as root. For the security of your\n"
400 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
401 "\tuser account. Modify the [Identity] configuration section to run\n"
402 "\tthe server as non-root user.\n");
406 /* Get the values given for user and group in configuration file */
407 user=server->config->identity->user;
408 group=server->config->identity->group;
410 /* Check whether the user/group information is text */
411 if (atoi(user)!=0 || atoi(group)!=0) {
412 SILC_LOG_DEBUG(("Invalid user and/or group information"));
413 SILC_LOG_DEBUG(("User and/or group given as number"));
414 fprintf(stderr, "Invalid user and/or group information\n");
415 fprintf(stderr, "Please assign them as names, not numbers\n");
419 /* Catch the nasty incident of string "0" returning 0 from atoi */
420 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
421 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
422 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
426 if (!(pw=getpwnam(user))) {
427 fprintf(stderr, "No such user %s found\n", user);
431 if (!(gr=getgrnam(group))) {
432 fprintf(stderr, "No such group %s found\n", group);
436 /* Check whether user and/or group is set to root. If yes, exit
437 immediately. Otherwise, setgid and setuid server to user.group */
438 if (gr->gr_gid==0 || pw->pw_uid==0) {
439 fprintf(stderr, "Error:"
440 "\tSILC server must not be run as root. For the security of your\n"
441 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
442 "\tuser account. Modify the [Identity] configuration section to run\n"
443 "\tthe server as non-root user.\n");
446 SILC_LOG_DEBUG(("Changing to group %s", group));
447 if (setgid(gr->gr_gid)==0) {
448 SILC_LOG_DEBUG(("Setgid to %s", group));
450 SILC_LOG_DEBUG(("Setgid to %s failed", group));
451 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
455 #if defined HAVE_SETGROUPS && defined HAVE_INITGROUPS
456 if (setgroups(0, NULL)!=0) {
457 SILC_LOG_DEBUG(("Setgroups to NULL failed"));
458 fprintf(stderr, "Tried to setgroups NULL but failed. Exiting\n");
461 if (initgroups(user, gr->gr_gid)!=0) {
462 SILC_LOG_DEBUG(("Initgroups to user %s (gid=%d) failed", user, gr->gr_gid));
463 fprintf(stderr, "Tried to initgroups %s (gid=%d) but no such user. Exiting\n",
468 SILC_LOG_DEBUG(("Changing to user %s", user));
469 if (setuid(pw->pw_uid)==0) {
470 SILC_LOG_DEBUG(("Setuid to %s", user));
472 SILC_LOG_DEBUG(("Setuid to %s failed", user));
473 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
481 /* The heart of the server. This runs the scheduler thus runs the server.
482 When this returns the server has been stopped and the program will
485 void silc_server_run(SilcServer server)
487 SILC_LOG_DEBUG(("Running server"));
489 SILC_LOG_INFO(("SILC Server started"));
491 /* Start the scheduler, the heart of the SILC server. When this returns
492 the program will be terminated. */
493 silc_schedule(server->schedule);
496 /* Stops the SILC server. This function is used to shutdown the server.
497 This is usually called after the scheduler has returned. After stopping
498 the server one should call silc_server_free. */
500 void silc_server_stop(SilcServer server)
502 SILC_LOG_DEBUG(("Stopping server"));
504 if (server->schedule) {
505 silc_schedule_stop(server->schedule);
506 silc_schedule_uninit(server->schedule);
507 server->schedule = NULL;
510 silc_server_protocols_unregister();
512 SILC_LOG_DEBUG(("Server stopped"));
515 /* Function that is called when the network connection to a router has
516 been established. This will continue with the key exchange protocol
517 with the remote router. */
519 void silc_server_start_key_exchange(SilcServer server,
520 SilcServerConnection sconn,
523 SilcSocketConnection newsocket;
524 SilcProtocol protocol;
525 SilcServerKEInternalContext *proto_ctx;
528 /* Set socket options */
529 silc_net_set_socket_nonblock(sock);
530 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
532 /* Create socket connection for the connection. Even though we
533 know that we are connecting to a router we will mark the socket
534 to be unknown connection until we have executed authentication
536 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
537 server->sockets[sock] = newsocket;
538 newsocket->hostname = strdup(sconn->remote_host);
539 newsocket->ip = strdup(sconn->remote_host);
540 newsocket->port = sconn->remote_port;
541 sconn->sock = newsocket;
543 /* Allocate internal protocol context. This is sent as context
545 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
546 proto_ctx->server = (void *)server;
547 proto_ctx->context = (void *)sconn;
548 proto_ctx->sock = newsocket;
549 proto_ctx->rng = server->rng;
550 proto_ctx->responder = FALSE;
552 /* Perform key exchange protocol. silc_server_connect_to_router_second
553 will be called after the protocol is finished. */
554 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
555 &protocol, proto_ctx,
556 silc_server_connect_to_router_second);
557 newsocket->protocol = protocol;
559 /* Register a timeout task that will be executed if the protocol
560 is not executed within set limit. */
561 proto_ctx->timeout_task =
562 silc_schedule_task_add(server->schedule, sock,
563 silc_server_timeout_remote,
564 server, server->params->protocol_timeout,
565 server->params->protocol_timeout_usec,
569 /* Register the connection for network input and output. This sets
570 that scheduler will listen for incoming packets for this connection
571 and sets that outgoing packets may be sent to this connection as
572 well. However, this doesn't set the scheduler for outgoing traffic,
573 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
574 later when outgoing data is available. */
575 context = (void *)server;
576 SILC_REGISTER_CONNECTION_FOR_IO(sock);
578 /* Run the protocol */
579 silc_protocol_execute(protocol, server->schedule, 0, 0);
582 /* Timeout callback that will be called to retry connecting to remote
583 router. This is used by both normal and router server. This will wait
584 before retrying the connecting. The timeout is generated by exponential
585 backoff algorithm. */
587 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
589 SilcServerConnection sconn = (SilcServerConnection)context;
590 SilcServer server = sconn->server;
592 SILC_LOG_INFO(("Retrying connecting to a router"));
594 /* Calculate next timeout */
595 if (sconn->retry_count >= 1) {
596 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
597 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
598 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
600 sconn->retry_timeout = server->params->retry_interval_min;
602 sconn->retry_count++;
603 sconn->retry_timeout = sconn->retry_timeout +
604 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
606 /* If we've reached max retry count, give up. */
607 if (sconn->retry_count > server->params->retry_count &&
608 server->params->retry_keep_trying == FALSE) {
609 SILC_LOG_ERROR(("Could not connect to router, giving up"));
610 silc_free(sconn->remote_host);
615 /* Wait one before retrying */
616 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
617 context, sconn->retry_timeout,
618 server->params->retry_interval_min_usec,
619 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
622 /* Generic routine to use connect to a router. */
624 SILC_TASK_CALLBACK(silc_server_connect_router)
626 SilcServerConnection sconn = (SilcServerConnection)context;
627 SilcServer server = sconn->server;
630 SILC_LOG_INFO(("Connecting to the %s %s on port %d",
631 (sconn->backup ? "backup router" : "router"),
632 sconn->remote_host, sconn->remote_port));
634 server->router_connect = time(0);
636 /* Connect to remote host */
637 sock = silc_net_create_connection(server->config->listen_port->local_ip,
641 SILC_LOG_ERROR(("Could not connect to router"));
642 silc_schedule_task_add(server->schedule, fd,
643 silc_server_connect_to_router_retry,
644 context, 0, 1, SILC_TASK_TIMEOUT,
645 SILC_TASK_PRI_NORMAL);
649 /* Continue with key exchange protocol */
650 silc_server_start_key_exchange(server, sconn, sock);
653 /* This function connects to our primary router or if we are a router this
654 establishes all our primary routes. This is called at the start of the
655 server to do authentication and key exchange with our router - called
658 SILC_TASK_CALLBACK(silc_server_connect_to_router)
660 SilcServer server = (SilcServer)context;
661 SilcServerConnection sconn;
662 SilcServerConfigSectionServerConnection *ptr;
664 SILC_LOG_DEBUG(("Connecting to router(s)"));
666 if (server->server_type == SILC_SERVER) {
667 SILC_LOG_DEBUG(("We are normal server"));
668 } else if (server->server_type == SILC_ROUTER) {
669 SILC_LOG_DEBUG(("We are router"));
671 SILC_LOG_DEBUG(("We are backup router/normal server"));
674 /* Create the connections to all our routes */
675 ptr = server->config->routers;
678 SILC_LOG_DEBUG(("%s connection [%s] %s:%d",
679 ptr->backup_router ? "Backup router" : "Router",
680 ptr->initiator ? "Initiator" : "Responder",
681 ptr->host, ptr->port));
683 if (ptr->initiator) {
684 /* Allocate connection object for hold connection specific stuff. */
685 sconn = silc_calloc(1, sizeof(*sconn));
686 sconn->server = server;
687 sconn->remote_host = strdup(ptr->host);
688 sconn->remote_port = ptr->port;
689 sconn->backup = ptr->backup_router;
691 sconn->backup_replace_ip = strdup(ptr->backup_replace_ip);
692 sconn->backup_replace_port = ptr->backup_replace_port;
695 if (!server->router_conn && !sconn->backup)
696 server->router_conn = sconn;
698 silc_schedule_task_add(server->schedule, fd,
699 silc_server_connect_router,
700 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
701 SILC_TASK_PRI_NORMAL);
710 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
712 /* There wasn't a configured router, we will continue but we don't
713 have a connection to outside world. We will be standalone server. */
714 server->standalone = TRUE;
717 /* Second part of connecting to router(s). Key exchange protocol has been
718 executed and now we will execute authentication protocol. */
720 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
722 SilcProtocol protocol = (SilcProtocol)context;
723 SilcServerKEInternalContext *ctx =
724 (SilcServerKEInternalContext *)protocol->context;
725 SilcServer server = (SilcServer)ctx->server;
726 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
727 SilcSocketConnection sock = ctx->sock;
728 SilcServerConnAuthInternalContext *proto_ctx;
729 SilcServerConfigSectionServerConnection *conn = NULL;
731 SILC_LOG_DEBUG(("Start"));
733 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
734 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
735 /* Error occured during protocol */
736 silc_protocol_free(protocol);
737 sock->protocol = NULL;
738 silc_ske_free_key_material(ctx->keymat);
740 silc_packet_context_free(ctx->packet);
742 silc_ske_free(ctx->ske);
743 silc_free(ctx->dest_id);
745 silc_schedule_task_del_by_callback(server->schedule,
746 silc_server_failure_callback);
747 silc_server_disconnect_remote(server, sock, "Server closed connection: "
748 "Key exchange failed");
752 /* We now have the key material as the result of the key exchange
753 protocol. Take the key material into use. Free the raw key material
754 as soon as we've set them into use. */
755 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
756 ctx->sock, ctx->keymat,
757 ctx->ske->prop->cipher,
758 ctx->ske->prop->pkcs,
759 ctx->ske->prop->hash,
760 ctx->ske->prop->hmac,
761 ctx->ske->prop->group,
763 silc_protocol_free(protocol);
764 sock->protocol = NULL;
765 silc_ske_free_key_material(ctx->keymat);
767 silc_packet_context_free(ctx->packet);
769 silc_ske_free(ctx->ske);
770 silc_free(ctx->dest_id);
772 silc_schedule_task_del_by_callback(server->schedule,
773 silc_server_failure_callback);
774 silc_server_disconnect_remote(server, sock, "Server closed connection: "
775 "Key exchange failed");
778 silc_ske_free_key_material(ctx->keymat);
780 /* Allocate internal context for the authentication protocol. This
781 is sent as context for the protocol. */
782 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
783 proto_ctx->server = (void *)server;
784 proto_ctx->context = (void *)sconn;
785 proto_ctx->sock = sock;
786 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
787 proto_ctx->dest_id_type = ctx->dest_id_type;
788 proto_ctx->dest_id = ctx->dest_id;
790 /* Resolve the authentication method used in this connection. Check if
791 we find a match from user configured connections */
792 conn = silc_server_config_find_router_conn(server->config,
796 /* Match found. Use the configured authentication method */
797 proto_ctx->auth_meth = conn->auth_meth;
798 if (conn->auth_data) {
799 proto_ctx->auth_data = strdup(conn->auth_data);
800 proto_ctx->auth_data_len = strlen(conn->auth_data);
803 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
804 sock->hostname, sock->ip, sock->port));
805 silc_protocol_free(protocol);
806 sock->protocol = NULL;
808 silc_packet_context_free(ctx->packet);
810 silc_ske_free(ctx->ske);
811 silc_free(ctx->dest_id);
813 silc_schedule_task_del_by_callback(server->schedule,
814 silc_server_failure_callback);
815 silc_server_disconnect_remote(server, sock, "Server closed connection: "
816 "Key exchange failed");
820 /* Free old protocol as it is finished now */
821 silc_protocol_free(protocol);
823 silc_packet_context_free(ctx->packet);
825 sock->protocol = NULL;
827 /* Allocate the authentication protocol. This is allocated here
828 but we won't start it yet. We will be receiving party of this
829 protocol thus we will wait that connecting party will make
831 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
832 &sock->protocol, proto_ctx,
833 silc_server_connect_to_router_final);
835 /* Register timeout task. If the protocol is not executed inside
836 this timelimit the connection will be terminated. Currently
837 this is 15 seconds and is hard coded limit (XXX). */
838 proto_ctx->timeout_task =
839 silc_schedule_task_add(server->schedule, sock->sock,
840 silc_server_timeout_remote,
841 (void *)server, 15, 0,
845 /* Run the protocol */
846 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
849 /* Finalizes the connection to router. Registers a server task to the
850 queue so that we can accept new connections. */
852 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
854 SilcProtocol protocol = (SilcProtocol)context;
855 SilcServerConnAuthInternalContext *ctx =
856 (SilcServerConnAuthInternalContext *)protocol->context;
857 SilcServer server = (SilcServer)ctx->server;
858 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
859 SilcSocketConnection sock = ctx->sock;
860 SilcServerEntry id_entry;
862 SilcServerHBContext hb_context;
863 unsigned char *id_string;
865 SilcIDListData idata;
867 SILC_LOG_DEBUG(("Start"));
869 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
870 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
871 /* Error occured during protocol */
872 silc_free(ctx->dest_id);
873 silc_server_disconnect_remote(server, sock, "Server closed connection: "
874 "Authentication failed");
878 /* Add a task to the queue. This task receives new connections to the
879 server. This task remains on the queue until the end of the program. */
880 if (!server->listenning && !sconn->backup) {
881 silc_schedule_task_add(server->schedule, server->sock,
882 silc_server_accept_new_connection,
883 (void *)server, 0, 0,
885 SILC_TASK_PRI_NORMAL);
886 server->listenning = TRUE;
889 /* Send NEW_SERVER packet to the router. We will become registered
890 to the SILC network after sending this packet. */
891 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
892 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
893 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
894 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
895 silc_buffer_format(packet,
896 SILC_STR_UI_SHORT(id_len),
897 SILC_STR_UI_XNSTRING(id_string, id_len),
898 SILC_STR_UI_SHORT(strlen(server->server_name)),
899 SILC_STR_UI_XNSTRING(server->server_name,
900 strlen(server->server_name)),
903 /* Send the packet */
904 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
905 packet->data, packet->len, TRUE);
906 silc_buffer_free(packet);
907 silc_free(id_string);
909 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
911 /* Check that we do not have this ID already */
912 id_entry = silc_idlist_find_server_by_id(server->local_list,
913 ctx->dest_id, TRUE, NULL);
915 silc_idcache_del_by_context(server->local_list->servers, id_entry);
917 id_entry = silc_idlist_find_server_by_id(server->global_list,
918 ctx->dest_id, TRUE, NULL);
920 silc_idcache_del_by_context(server->global_list->servers, id_entry);
923 SILC_LOG_DEBUG(("New server id(%s)",
924 silc_id_render(ctx->dest_id, SILC_ID_SERVER)));
926 /* Add the connected router to global server list */
927 id_entry = silc_idlist_add_server(server->global_list,
928 strdup(sock->hostname),
929 SILC_ROUTER, ctx->dest_id, NULL, sock);
931 silc_free(ctx->dest_id);
932 silc_server_disconnect_remote(server, sock, "Server closed connection: "
933 "Authentication failed");
937 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
938 silc_free(sock->user_data);
939 sock->user_data = (void *)id_entry;
940 sock->type = SILC_SOCKET_TYPE_ROUTER;
941 idata = (SilcIDListData)sock->user_data;
942 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
944 /* Perform keepalive. The `hb_context' will be freed automatically
945 when finally calling the silc_socket_free function. XXX hardcoded
947 hb_context = silc_calloc(1, sizeof(*hb_context));
948 hb_context->server = server;
949 silc_socket_set_heartbeat(sock, 600, hb_context,
950 silc_server_perform_heartbeat,
953 /* Register re-key timeout */
954 idata->rekey->timeout = 3600; /* XXX hardcoded */
955 idata->rekey->context = (void *)server;
956 silc_schedule_task_add(server->schedule, sock->sock,
957 silc_server_rekey_callback,
958 (void *)sock, idata->rekey->timeout, 0,
959 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
961 if (!sconn->backup) {
962 /* Mark this router our primary router if we're still standalone */
963 if (server->standalone) {
964 server->id_entry->router = id_entry;
965 server->router = id_entry;
966 server->standalone = FALSE;
968 /* If we are router then announce our possible servers. */
969 if (server->server_type == SILC_ROUTER)
970 silc_server_announce_servers(server, FALSE, 0,
971 server->router->connection);
973 /* Announce our clients and channels to the router */
974 silc_server_announce_clients(server, 0, server->router->connection);
975 silc_server_announce_channels(server, 0, server->router->connection);
978 /* Add this server to be our backup router */
979 silc_server_backup_add(server, id_entry, sconn->backup_replace_ip,
980 sconn->backup_replace_port, FALSE);
983 sock->protocol = NULL;
985 /* Call the completion callback to indicate that we've connected to
988 (*sconn->callback)(server, id_entry, sconn->callback_context);
991 /* Free the temporary connection data context */
993 silc_free(sconn->remote_host);
994 silc_free(sconn->backup_replace_ip);
997 if (sconn == server->router_conn)
998 server->router_conn = NULL;
1000 /* Free the protocol object */
1001 if (sock->protocol == protocol)
1002 sock->protocol = NULL;
1003 silc_protocol_free(protocol);
1005 silc_packet_context_free(ctx->packet);
1007 silc_ske_free(ctx->ske);
1008 silc_free(ctx->auth_data);
1012 /* Host lookup callbcak that is called after the incoming connection's
1013 IP and FQDN lookup is performed. This will actually check the acceptance
1014 of the incoming connection and will register the key exchange protocol
1015 for this connection. */
1018 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
1021 SilcServer server = (SilcServer)context;
1022 SilcServerKEInternalContext *proto_ctx;
1023 void *cconfig, *sconfig, *rconfig;
1024 SilcServerConfigSectionDenyConnection *deny;
1027 SILC_LOG_DEBUG(("Start"));
1029 /* Check whether we could resolve both IP and FQDN. */
1030 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
1031 server->params->require_reverse_mapping)) {
1032 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
1033 sock->hostname ? sock->hostname :
1034 sock->ip ? sock->ip : ""));
1035 server->stat.conn_failures++;
1036 silc_server_disconnect_remote(server, sock,
1037 "Server closed connection: Unknown host");
1041 /* Register the connection for network input and output. This sets
1042 that scheduler will listen for incoming packets for this connection
1043 and sets that outgoing packets may be sent to this connection as well.
1044 However, this doesn't set the scheduler for outgoing traffic, it
1045 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1046 later when outgoing data is available. */
1047 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
1049 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
1052 port = server->sockets[server->sock]->port; /* Listenning port */
1054 /* Check whether this connection is denied to connect to us. */
1055 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
1057 deny = silc_server_config_denied_conn(server->config, sock->hostname,
1060 /* The connection is denied */
1061 SILC_LOG_INFO(("Connection %s (%s) is denied",
1062 sock->hostname, sock->ip));
1063 silc_server_disconnect_remote(server, sock, deny->comment ?
1065 "Server closed connection: "
1066 "Connection refused");
1067 server->stat.conn_failures++;
1071 /* Check whether we have configred this sort of connection at all. We
1072 have to check all configurations since we don't know what type of
1073 connection this is. */
1074 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1076 cconfig = silc_server_config_find_client_conn(server->config,
1079 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1082 sconfig = silc_server_config_find_server_conn(server->config,
1085 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1087 rconfig = silc_server_config_find_router_conn(server->config,
1090 if (!cconfig && !sconfig && !rconfig) {
1091 SILC_LOG_INFO(("Connection %s (%s) is not allowed",
1092 sock->hostname, sock->ip));
1093 silc_server_disconnect_remote(server, sock,
1094 "Server closed connection: "
1095 "Connection refused");
1096 server->stat.conn_failures++;
1100 /* The connection is allowed */
1102 /* Allocate internal context for key exchange protocol. This is
1103 sent as context for the protocol. */
1104 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1105 proto_ctx->server = context;
1106 proto_ctx->sock = sock;
1107 proto_ctx->rng = server->rng;
1108 proto_ctx->responder = TRUE;
1109 proto_ctx->cconfig = cconfig;
1110 proto_ctx->sconfig = sconfig;
1111 proto_ctx->rconfig = rconfig;
1113 /* Prepare the connection for key exchange protocol. We allocate the
1114 protocol but will not start it yet. The connector will be the
1115 initiator of the protocol thus we will wait for initiation from
1116 there before we start the protocol. */
1117 server->stat.auth_attempts++;
1118 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1119 &sock->protocol, proto_ctx,
1120 silc_server_accept_new_connection_second);
1122 /* Register a timeout task that will be executed if the connector
1123 will not start the key exchange protocol within 60 seconds. For
1124 now, this is a hard coded limit. After 60 secs the connection will
1125 be closed if the key exchange protocol has not been started. */
1126 proto_ctx->timeout_task =
1127 silc_schedule_task_add(server->schedule, sock->sock,
1128 silc_server_timeout_remote,
1134 /* Accepts new connections to the server. Accepting new connections are
1135 done in three parts to make it async. */
1137 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1139 SilcServer server = (SilcServer)context;
1140 SilcSocketConnection newsocket;
1143 SILC_LOG_DEBUG(("Accepting new connection"));
1145 server->stat.conn_attempts++;
1147 sock = silc_net_accept_connection(server->sock);
1149 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1150 server->stat.conn_failures++;
1154 /* Check max connections */
1155 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1156 SILC_LOG_ERROR(("Refusing connection, server is full"));
1157 server->stat.conn_failures++;
1161 /* Set socket options */
1162 silc_net_set_socket_nonblock(sock);
1163 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1165 /* We don't create a ID yet, since we don't know what type of connection
1166 this is yet. But, we do add the connection to the socket table. */
1167 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1168 server->sockets[sock] = newsocket;
1170 /* Perform asynchronous host lookup. This will lookup the IP and the
1171 FQDN of the remote connection. After the lookup is done the connection
1172 is accepted further. */
1173 silc_socket_host_lookup(newsocket, TRUE,
1174 silc_server_accept_new_connection_lookup, context,
1178 /* Second part of accepting new connection. Key exchange protocol has been
1179 performed and now it is time to do little connection authentication
1180 protocol to figure out whether this connection is client or server
1181 and whether it has right to access this server (especially server
1182 connections needs to be authenticated). */
1184 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1186 SilcProtocol protocol = (SilcProtocol)context;
1187 SilcServerKEInternalContext *ctx =
1188 (SilcServerKEInternalContext *)protocol->context;
1189 SilcServer server = (SilcServer)ctx->server;
1190 SilcSocketConnection sock = ctx->sock;
1191 SilcServerConnAuthInternalContext *proto_ctx;
1193 SILC_LOG_DEBUG(("Start"));
1195 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1196 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1197 /* Error occured during protocol */
1198 silc_protocol_free(protocol);
1199 sock->protocol = NULL;
1200 silc_ske_free_key_material(ctx->keymat);
1202 silc_packet_context_free(ctx->packet);
1204 silc_ske_free(ctx->ske);
1205 silc_free(ctx->dest_id);
1207 silc_schedule_task_del_by_callback(server->schedule,
1208 silc_server_failure_callback);
1209 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1210 "Key exchange failed");
1211 server->stat.auth_failures++;
1215 /* We now have the key material as the result of the key exchange
1216 protocol. Take the key material into use. Free the raw key material
1217 as soon as we've set them into use. */
1218 if (!silc_server_protocol_ke_set_keys(server, ctx->ske,
1219 ctx->sock, ctx->keymat,
1220 ctx->ske->prop->cipher,
1221 ctx->ske->prop->pkcs,
1222 ctx->ske->prop->hash,
1223 ctx->ske->prop->hmac,
1224 ctx->ske->prop->group,
1226 silc_protocol_free(protocol);
1227 sock->protocol = NULL;
1228 silc_ske_free_key_material(ctx->keymat);
1230 silc_packet_context_free(ctx->packet);
1232 silc_ske_free(ctx->ske);
1233 silc_free(ctx->dest_id);
1235 silc_schedule_task_del_by_callback(server->schedule,
1236 silc_server_failure_callback);
1237 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1238 "Key exchange failed");
1239 server->stat.auth_failures++;
1242 silc_ske_free_key_material(ctx->keymat);
1244 /* Allocate internal context for the authentication protocol. This
1245 is sent as context for the protocol. */
1246 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1247 proto_ctx->server = (void *)server;
1248 proto_ctx->sock = sock;
1249 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1250 proto_ctx->responder = TRUE;
1251 proto_ctx->dest_id_type = ctx->dest_id_type;
1252 proto_ctx->dest_id = ctx->dest_id;
1253 proto_ctx->cconfig = ctx->cconfig;
1254 proto_ctx->sconfig = ctx->sconfig;
1255 proto_ctx->rconfig = ctx->rconfig;
1257 /* Free old protocol as it is finished now */
1258 silc_protocol_free(protocol);
1260 silc_packet_context_free(ctx->packet);
1262 sock->protocol = NULL;
1264 /* Allocate the authentication protocol. This is allocated here
1265 but we won't start it yet. We will be receiving party of this
1266 protocol thus we will wait that connecting party will make
1267 their first move. */
1268 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1269 &sock->protocol, proto_ctx,
1270 silc_server_accept_new_connection_final);
1272 /* Register timeout task. If the protocol is not executed inside
1273 this timelimit the connection will be terminated. Currently
1274 this is 60 seconds and is hard coded limit (XXX). */
1275 proto_ctx->timeout_task =
1276 silc_schedule_task_add(server->schedule, sock->sock,
1277 silc_server_timeout_remote,
1278 (void *)server, 60, 0,
1283 /* Final part of accepting new connection. The connection has now
1284 been authenticated and keys has been exchanged. We also know whether
1285 this is client or server connection. */
1287 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1289 SilcProtocol protocol = (SilcProtocol)context;
1290 SilcServerConnAuthInternalContext *ctx =
1291 (SilcServerConnAuthInternalContext *)protocol->context;
1292 SilcServer server = (SilcServer)ctx->server;
1293 SilcSocketConnection sock = ctx->sock;
1294 SilcServerHBContext hb_context;
1295 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1296 void *id_entry = NULL;
1298 SILC_LOG_DEBUG(("Start"));
1300 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1301 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1302 /* Error occured during protocol */
1303 silc_protocol_free(protocol);
1304 sock->protocol = NULL;
1306 silc_packet_context_free(ctx->packet);
1308 silc_ske_free(ctx->ske);
1309 silc_free(ctx->dest_id);
1311 silc_schedule_task_del_by_callback(server->schedule,
1312 silc_server_failure_callback);
1313 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1314 "Authentication failed");
1315 server->stat.auth_failures++;
1319 entry->data.last_receive = time(NULL);
1321 switch (ctx->conn_type) {
1322 case SILC_SOCKET_TYPE_CLIENT:
1324 SilcClientEntry client;
1326 SILC_LOG_DEBUG(("Remote host is client"));
1327 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1330 /* Add the client to the client ID cache. The nickname and Client ID
1331 and other information is created after we have received NEW_CLIENT
1332 packet from client. */
1333 client = silc_idlist_add_client(server->local_list,
1334 NULL, NULL, NULL, NULL, NULL, sock, 0);
1336 SILC_LOG_ERROR(("Could not add new client to cache"));
1337 silc_free(sock->user_data);
1338 silc_server_disconnect_remote(server, sock,
1339 "Server closed connection: "
1340 "Authentication failed");
1341 server->stat.auth_failures++;
1346 server->stat.my_clients++;
1347 server->stat.clients++;
1348 if (server->server_type == SILC_ROUTER)
1349 server->stat.cell_clients++;
1351 id_entry = (void *)client;
1354 case SILC_SOCKET_TYPE_SERVER:
1355 case SILC_SOCKET_TYPE_ROUTER:
1357 SilcServerEntry new_server;
1358 SilcServerConfigSectionServerConnection *conn =
1359 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1360 ctx->sconfig : ctx->rconfig;
1362 SILC_LOG_DEBUG(("Remote host is %s",
1363 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1364 "server" : (conn->backup_router ?
1365 "backup router" : "router")));
1366 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1367 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1368 "server" : (conn->backup_router ?
1369 "backup router" : "router")));
1371 /* Add the server into server cache. The server name and Server ID
1372 is updated after we have received NEW_SERVER packet from the
1373 server. We mark ourselves as router for this server if we really
1376 silc_idlist_add_server((ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1377 server->local_list : (conn->backup_router ?
1378 server->local_list :
1379 server->global_list)),
1381 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1382 SILC_SERVER : SILC_ROUTER),
1384 (ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1385 server->id_entry : (conn->backup_router ?
1386 server->id_entry : NULL)),
1389 SILC_LOG_ERROR(("Could not add new server to cache"));
1390 silc_free(sock->user_data);
1391 silc_server_disconnect_remote(server, sock,
1392 "Server closed connection: "
1393 "Authentication failed");
1394 server->stat.auth_failures++;
1399 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1400 server->stat.my_servers++;
1402 server->stat.my_routers++;
1403 server->stat.servers++;
1405 id_entry = (void *)new_server;
1407 /* If the incoming connection is router and marked as backup router
1408 then add it to be one of our backups */
1409 if (ctx->conn_type == SILC_SOCKET_TYPE_ROUTER && conn->backup_router) {
1410 silc_server_backup_add(server, new_server, conn->backup_replace_ip,
1411 conn->backup_replace_port, conn->backup_local);
1413 /* Change it back to SERVER type since that's what it really is. */
1414 if (conn->backup_local)
1415 ctx->conn_type = SILC_SOCKET_TYPE_SERVER;
1417 new_server->server_type = SILC_BACKUP_ROUTER;
1420 /* Check whether this connection is to be our primary router connection
1421 if we do not already have the primary route. */
1422 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1423 if (silc_server_config_is_primary_route(server->config) &&
1427 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1428 server->standalone = FALSE;
1429 if (!server->id_entry->router) {
1430 server->id_entry->router = id_entry;
1431 server->router = id_entry;
1441 sock->type = ctx->conn_type;
1443 /* Add the common data structure to the ID entry. */
1445 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1447 /* Add to sockets internal pointer for fast referencing */
1448 silc_free(sock->user_data);
1449 sock->user_data = id_entry;
1451 /* Connection has been fully established now. Everything is ok. */
1452 SILC_LOG_DEBUG(("New connection authenticated"));
1454 /* Perform keepalive. The `hb_context' will be freed automatically
1455 when finally calling the silc_socket_free function. XXX hardcoded
1457 hb_context = silc_calloc(1, sizeof(*hb_context));
1458 hb_context->server = server;
1459 silc_socket_set_heartbeat(sock, 600, hb_context,
1460 silc_server_perform_heartbeat,
1464 silc_schedule_task_del_by_callback(server->schedule,
1465 silc_server_failure_callback);
1466 silc_protocol_free(protocol);
1468 silc_packet_context_free(ctx->packet);
1470 silc_ske_free(ctx->ske);
1471 silc_free(ctx->dest_id);
1473 sock->protocol = NULL;
1476 /* This function is used to read packets from network and send packets to
1477 network. This is usually a generic task. */
1479 SILC_TASK_CALLBACK(silc_server_packet_process)
1481 SilcServer server = (SilcServer)context;
1482 SilcSocketConnection sock = server->sockets[fd];
1483 SilcIDListData idata;
1484 SilcCipher cipher = NULL;
1485 SilcHmac hmac = NULL;
1486 uint32 sequence = 0;
1492 SILC_LOG_DEBUG(("Processing packet"));
1494 /* Packet sending */
1496 if (type == SILC_TASK_WRITE) {
1497 /* Do not send data to disconnected connection */
1498 if (SILC_IS_DISCONNECTED(sock))
1501 server->stat.packets_sent++;
1503 if (sock->outbuf->data - sock->outbuf->head)
1504 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1506 /* Send the packet */
1507 ret = silc_packet_send(sock, TRUE);
1509 /* If returned -2 could not write to connection now, will do
1515 SILC_LOG_ERROR(("Error sending packet to connection "
1516 "%s:%d [%s]", sock->hostname, sock->port,
1517 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1518 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1519 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1524 /* The packet has been sent and now it is time to set the connection
1525 back to only for input. When there is again some outgoing data
1526 available for this connection it will be set for output as well.
1527 This call clears the output setting and sets it only for input. */
1528 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1529 SILC_UNSET_OUTBUF_PENDING(sock);
1531 silc_buffer_clear(sock->outbuf);
1535 /* Packet receiving */
1537 /* Read some data from connection */
1538 ret = silc_packet_receive(sock);
1542 SILC_LOG_ERROR(("Error receiving packet from connection "
1543 "%s:%d [%s] %s", sock->hostname, sock->port,
1544 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1545 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1546 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1547 "Router"), strerror(errno)));
1553 SILC_LOG_DEBUG(("Read EOF"));
1555 /* If connection is disconnecting already we will finally
1556 close the connection */
1557 if (SILC_IS_DISCONNECTING(sock)) {
1558 if (sock->user_data)
1559 silc_server_free_sock_user_data(server, sock, NULL);
1560 silc_server_close_connection(server, sock);
1564 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1565 SILC_SET_DISCONNECTING(sock);
1567 if (sock->user_data)
1568 silc_server_free_sock_user_data(server, sock, NULL);
1569 else if (server->router_conn && server->router_conn->sock == sock &&
1570 !server->router && server->standalone)
1571 silc_schedule_task_add(server->schedule, 0,
1572 silc_server_connect_to_router,
1575 SILC_TASK_PRI_NORMAL);
1577 silc_server_close_connection(server, sock);
1581 /* If connection is disconnecting or disconnected we will ignore
1583 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1584 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1588 server->stat.packets_received++;
1590 /* Get keys and stuff from ID entry */
1591 idata = (SilcIDListData)sock->user_data;
1593 cipher = idata->receive_key;
1594 hmac = idata->hmac_receive;
1595 sequence = idata->psn_receive;
1598 /* Process the packet. This will call the parser that will then
1599 decrypt and parse the packet. */
1600 ret = silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1601 TRUE : FALSE, cipher, hmac, sequence,
1602 silc_server_packet_parse, server);
1604 /* If this socket connection is not authenticated yet and the packet
1605 processing failed we will drop the connection since it can be
1606 a malicious flooder. */
1607 if (sock->type == SILC_SOCKET_TYPE_UNKNOWN && ret == FALSE &&
1608 (!sock->protocol || sock->protocol->protocol->type ==
1609 SILC_PROTOCOL_SERVER_KEY_EXCHANGE)) {
1610 SILC_LOG_DEBUG(("Bad data sent from unknown connection %d", sock->sock));
1611 SILC_SET_DISCONNECTING(sock);
1613 if (sock->user_data)
1614 silc_server_free_sock_user_data(server, sock, NULL);
1615 silc_server_close_connection(server, sock);
1619 /* Parses whole packet, received earlier. */
1621 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1623 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1624 SilcServer server = (SilcServer)parse_ctx->context;
1625 SilcSocketConnection sock = parse_ctx->sock;
1626 SilcPacketContext *packet = parse_ctx->packet;
1627 SilcIDListData idata = (SilcIDListData)sock->user_data;
1630 SILC_LOG_DEBUG(("Start"));
1632 /* Parse the packet */
1633 if (parse_ctx->normal)
1634 ret = silc_packet_parse(packet, idata ? idata->receive_key : NULL);
1636 ret = silc_packet_parse_special(packet, idata ? idata->receive_key : NULL);
1638 /* If entry is disabled ignore what we got. */
1639 if (ret != SILC_PACKET_RESUME_ROUTER &&
1640 idata && idata->status & SILC_IDLIST_STATUS_DISABLED) {
1641 SILC_LOG_DEBUG(("Connection is disabled"));
1645 if (ret == SILC_PACKET_NONE)
1648 /* Check that the the current client ID is same as in the client's packet. */
1649 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1650 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1651 if (client && client->id) {
1652 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1653 packet->src_id_type);
1654 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1662 if (server->server_type == SILC_ROUTER) {
1663 /* Route the packet if it is not destined to us. Other ID types but
1664 server are handled separately after processing them. */
1665 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1666 packet->dst_id_type == SILC_ID_SERVER &&
1667 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1668 memcmp(packet->dst_id, server->id_string, server->id_string_len)) {
1670 /* Route the packet to fastest route for the destination ID */
1671 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1672 packet->dst_id_type);
1675 silc_server_packet_route(server,
1676 silc_server_route_get(server, id,
1677 packet->dst_id_type),
1684 /* Parse the incoming packet type */
1685 silc_server_packet_parse_type(server, sock, packet);
1687 if (server->server_type == SILC_ROUTER) {
1688 /* Broadcast packet if it is marked as broadcast packet and it is
1689 originated from router and we are router. */
1690 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1691 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1692 !server->standalone) {
1693 /* Broadcast to our primary route */
1694 silc_server_packet_broadcast(server, server->router->connection, packet);
1696 /* If we have backup routers then we need to feed all broadcast
1697 data to those servers. */
1698 silc_server_backup_broadcast(server, sock, packet);
1703 silc_packet_context_free(packet);
1704 silc_free(parse_ctx);
1707 /* Parser callback called by silc_packet_receive_process. This merely
1708 registers timeout that will handle the actual parsing when appropriate. */
1710 bool silc_server_packet_parse(SilcPacketParserContext *parser_context,
1713 SilcServer server = (SilcServer)context;
1714 SilcSocketConnection sock = parser_context->sock;
1715 SilcIDListData idata = (SilcIDListData)sock->user_data;
1718 idata->psn_receive = parser_context->packet->sequence + 1;
1720 /* If protocol for this connection is key exchange or rekey then we'll
1721 process all packets synchronously, since there might be packets in
1722 queue that we are not able to decrypt without first processing the
1723 packets before them. */
1724 if ((parser_context->packet->type == SILC_PACKET_REKEY ||
1725 parser_context->packet->type == SILC_PACKET_REKEY_DONE) ||
1726 (sock->protocol && sock->protocol->protocol &&
1727 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1728 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY))) {
1729 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1732 /* Reprocess data since we'll return FALSE here. This is because
1733 the idata->receive_key might have become valid in the last packet
1734 and we want to call this processor with valid cipher. */
1736 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1737 TRUE : FALSE, idata->receive_key,
1738 idata->hmac_receive, idata->psn_receive,
1739 silc_server_packet_parse, server);
1741 silc_packet_receive_process(sock, server->server_type == SILC_ROUTER ?
1742 TRUE : FALSE, NULL, NULL, 0,
1743 silc_server_packet_parse, server);
1747 switch (sock->type) {
1748 case SILC_SOCKET_TYPE_UNKNOWN:
1749 case SILC_SOCKET_TYPE_CLIENT:
1750 /* Parse the packet with timeout */
1751 silc_schedule_task_add(server->schedule, sock->sock,
1752 silc_server_packet_parse_real,
1753 (void *)parser_context, 0, 100000,
1755 SILC_TASK_PRI_NORMAL);
1757 case SILC_SOCKET_TYPE_SERVER:
1758 case SILC_SOCKET_TYPE_ROUTER:
1759 /* Packets from servers are parsed immediately */
1760 silc_server_packet_parse_real(server->schedule, 0, sock->sock,
1770 /* Parses the packet type and calls what ever routines the packet type
1771 requires. This is done for all incoming packets. */
1773 void silc_server_packet_parse_type(SilcServer server,
1774 SilcSocketConnection sock,
1775 SilcPacketContext *packet)
1777 SilcPacketType type = packet->type;
1778 SilcIDListData idata = (SilcIDListData)sock->user_data;
1780 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1782 /* Parse the packet type */
1784 case SILC_PACKET_DISCONNECT:
1785 SILC_LOG_DEBUG(("Disconnect packet"));
1786 if (packet->flags & SILC_PACKET_FLAG_LIST)
1790 case SILC_PACKET_SUCCESS:
1792 * Success received for something. For now we can have only
1793 * one protocol for connection executing at once hence this
1794 * success message is for whatever protocol is executing currently.
1796 SILC_LOG_DEBUG(("Success packet"));
1797 if (packet->flags & SILC_PACKET_FLAG_LIST)
1800 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1803 case SILC_PACKET_FAILURE:
1805 * Failure received for something. For now we can have only
1806 * one protocol for connection executing at once hence this
1807 * failure message is for whatever protocol is executing currently.
1809 SILC_LOG_DEBUG(("Failure packet"));
1810 if (packet->flags & SILC_PACKET_FLAG_LIST)
1812 if (sock->protocol) {
1813 SilcServerFailureContext f;
1814 f = silc_calloc(1, sizeof(*f));
1818 /* We will wait 5 seconds to process this failure packet */
1819 silc_schedule_task_add(server->schedule, sock->sock,
1820 silc_server_failure_callback, (void *)f, 5, 0,
1821 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1825 case SILC_PACKET_REJECT:
1826 SILC_LOG_DEBUG(("Reject packet"));
1827 if (packet->flags & SILC_PACKET_FLAG_LIST)
1832 case SILC_PACKET_NOTIFY:
1834 * Received notify packet. Server can receive notify packets from
1835 * router. Server then relays the notify messages to clients if needed.
1837 SILC_LOG_DEBUG(("Notify packet"));
1838 if (packet->flags & SILC_PACKET_FLAG_LIST)
1839 silc_server_notify_list(server, sock, packet);
1841 silc_server_notify(server, sock, packet);
1847 case SILC_PACKET_CHANNEL_MESSAGE:
1849 * Received channel message. Channel messages are special packets
1850 * (although probably most common ones) thus they are handled
1853 SILC_LOG_DEBUG(("Channel Message packet"));
1854 if (packet->flags & SILC_PACKET_FLAG_LIST)
1856 idata->last_receive = time(NULL);
1857 silc_server_channel_message(server, sock, packet);
1860 case SILC_PACKET_CHANNEL_KEY:
1862 * Received key for channel. As channels are created by the router
1863 * the keys are as well. We will distribute the key to all of our
1864 * locally connected clients on the particular channel. Router
1865 * never receives this channel and thus is ignored.
1867 SILC_LOG_DEBUG(("Channel Key packet"));
1868 if (packet->flags & SILC_PACKET_FLAG_LIST)
1870 silc_server_channel_key(server, sock, packet);
1876 case SILC_PACKET_COMMAND:
1878 * Recived command. Processes the command request and allocates the
1879 * command context and calls the command.
1881 SILC_LOG_DEBUG(("Command packet"));
1882 if (packet->flags & SILC_PACKET_FLAG_LIST)
1884 silc_server_command_process(server, sock, packet);
1887 case SILC_PACKET_COMMAND_REPLY:
1889 * Received command reply packet. Received command reply to command. It
1890 * may be reply to command sent by us or reply to command sent by client
1891 * that we've routed further.
1893 SILC_LOG_DEBUG(("Command Reply packet"));
1894 if (packet->flags & SILC_PACKET_FLAG_LIST)
1896 silc_server_command_reply(server, sock, packet);
1900 * Private Message packets
1902 case SILC_PACKET_PRIVATE_MESSAGE:
1904 * Received private message packet. The packet is coming from either
1907 SILC_LOG_DEBUG(("Private Message packet"));
1908 if (packet->flags & SILC_PACKET_FLAG_LIST)
1910 idata->last_receive = time(NULL);
1911 silc_server_private_message(server, sock, packet);
1914 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1916 * Private message key packet.
1918 if (packet->flags & SILC_PACKET_FLAG_LIST)
1920 silc_server_private_message_key(server, sock, packet);
1924 * Key Exchange protocol packets
1926 case SILC_PACKET_KEY_EXCHANGE:
1927 SILC_LOG_DEBUG(("KE packet"));
1928 if (packet->flags & SILC_PACKET_FLAG_LIST)
1931 if (sock->protocol && sock->protocol->protocol &&
1932 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1934 SilcServerKEInternalContext *proto_ctx =
1935 (SilcServerKEInternalContext *)sock->protocol->context;
1937 proto_ctx->packet = silc_packet_context_dup(packet);
1939 /* Let the protocol handle the packet */
1940 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1942 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1943 "protocol active, packet dropped."));
1947 case SILC_PACKET_KEY_EXCHANGE_1:
1948 SILC_LOG_DEBUG(("KE 1 packet"));
1949 if (packet->flags & SILC_PACKET_FLAG_LIST)
1952 if (sock->protocol && sock->protocol->protocol &&
1953 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1954 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1956 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1957 SilcServerRekeyInternalContext *proto_ctx =
1958 (SilcServerRekeyInternalContext *)sock->protocol->context;
1960 if (proto_ctx->packet)
1961 silc_packet_context_free(proto_ctx->packet);
1963 proto_ctx->packet = silc_packet_context_dup(packet);
1965 /* Let the protocol handle the packet */
1966 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1968 SilcServerKEInternalContext *proto_ctx =
1969 (SilcServerKEInternalContext *)sock->protocol->context;
1971 if (proto_ctx->packet)
1972 silc_packet_context_free(proto_ctx->packet);
1974 proto_ctx->packet = silc_packet_context_dup(packet);
1975 proto_ctx->dest_id_type = packet->src_id_type;
1976 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1977 packet->src_id_type);
1978 if (!proto_ctx->dest_id)
1981 /* Let the protocol handle the packet */
1982 silc_protocol_execute(sock->protocol, server->schedule,
1986 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1987 "protocol active, packet dropped."));
1991 case SILC_PACKET_KEY_EXCHANGE_2:
1992 SILC_LOG_DEBUG(("KE 2 packet"));
1993 if (packet->flags & SILC_PACKET_FLAG_LIST)
1996 if (sock->protocol && sock->protocol->protocol &&
1997 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1998 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
2000 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2001 SilcServerRekeyInternalContext *proto_ctx =
2002 (SilcServerRekeyInternalContext *)sock->protocol->context;
2004 if (proto_ctx->packet)
2005 silc_packet_context_free(proto_ctx->packet);
2007 proto_ctx->packet = silc_packet_context_dup(packet);
2009 /* Let the protocol handle the packet */
2010 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2012 SilcServerKEInternalContext *proto_ctx =
2013 (SilcServerKEInternalContext *)sock->protocol->context;
2015 if (proto_ctx->packet)
2016 silc_packet_context_free(proto_ctx->packet);
2018 proto_ctx->packet = silc_packet_context_dup(packet);
2019 proto_ctx->dest_id_type = packet->src_id_type;
2020 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
2021 packet->src_id_type);
2022 if (!proto_ctx->dest_id)
2025 /* Let the protocol handle the packet */
2026 silc_protocol_execute(sock->protocol, server->schedule,
2030 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
2031 "protocol active, packet dropped."));
2035 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
2037 * Connection authentication request packet. When we receive this packet
2038 * we will send to the other end information about our mandatory
2039 * authentication method for the connection. This packet maybe received
2042 SILC_LOG_DEBUG(("Connection authentication request packet"));
2043 if (packet->flags & SILC_PACKET_FLAG_LIST)
2045 silc_server_connection_auth_request(server, sock, packet);
2049 * Connection Authentication protocol packets
2051 case SILC_PACKET_CONNECTION_AUTH:
2052 /* Start of the authentication protocol. We receive here the
2053 authentication data and will verify it. */
2054 SILC_LOG_DEBUG(("Connection auth packet"));
2055 if (packet->flags & SILC_PACKET_FLAG_LIST)
2058 if (sock->protocol && sock->protocol->protocol->type
2059 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
2061 SilcServerConnAuthInternalContext *proto_ctx =
2062 (SilcServerConnAuthInternalContext *)sock->protocol->context;
2064 proto_ctx->packet = silc_packet_context_dup(packet);
2066 /* Let the protocol handle the packet */
2067 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2069 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
2070 "protocol active, packet dropped."));
2074 case SILC_PACKET_NEW_ID:
2076 * Received New ID packet. This includes some new ID that has been
2077 * created. It may be for client, server or channel. This is the way
2078 * to distribute information about new registered entities in the
2081 SILC_LOG_DEBUG(("New ID packet"));
2082 if (packet->flags & SILC_PACKET_FLAG_LIST)
2083 silc_server_new_id_list(server, sock, packet);
2085 silc_server_new_id(server, sock, packet);
2088 case SILC_PACKET_NEW_CLIENT:
2090 * Received new client packet. This includes client information that
2091 * we will use to create initial client ID. After creating new
2092 * ID we will send it to the client.
2094 SILC_LOG_DEBUG(("New Client packet"));
2095 if (packet->flags & SILC_PACKET_FLAG_LIST)
2097 silc_server_new_client(server, sock, packet);
2100 case SILC_PACKET_NEW_SERVER:
2102 * Received new server packet. This includes Server ID and some other
2103 * information that we may save. This is received after server has
2106 SILC_LOG_DEBUG(("New Server packet"));
2107 if (packet->flags & SILC_PACKET_FLAG_LIST)
2109 silc_server_new_server(server, sock, packet);
2112 case SILC_PACKET_NEW_CHANNEL:
2114 * Received new channel packet. Information about new channel in the
2115 * network are distributed using this packet.
2117 SILC_LOG_DEBUG(("New Channel packet"));
2118 if (packet->flags & SILC_PACKET_FLAG_LIST)
2119 silc_server_new_channel_list(server, sock, packet);
2121 silc_server_new_channel(server, sock, packet);
2124 case SILC_PACKET_HEARTBEAT:
2126 * Received heartbeat.
2128 SILC_LOG_DEBUG(("Heartbeat packet"));
2129 if (packet->flags & SILC_PACKET_FLAG_LIST)
2133 case SILC_PACKET_KEY_AGREEMENT:
2135 * Received heartbeat.
2137 SILC_LOG_DEBUG(("Key agreement packet"));
2138 if (packet->flags & SILC_PACKET_FLAG_LIST)
2140 silc_server_key_agreement(server, sock, packet);
2143 case SILC_PACKET_REKEY:
2145 * Received re-key packet. The sender wants to regenerate the session
2148 SILC_LOG_DEBUG(("Re-key packet"));
2149 if (packet->flags & SILC_PACKET_FLAG_LIST)
2151 silc_server_rekey(server, sock, packet);
2154 case SILC_PACKET_REKEY_DONE:
2156 * The re-key is done.
2158 SILC_LOG_DEBUG(("Re-key done packet"));
2159 if (packet->flags & SILC_PACKET_FLAG_LIST)
2162 if (sock->protocol && sock->protocol->protocol &&
2163 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2165 SilcServerRekeyInternalContext *proto_ctx =
2166 (SilcServerRekeyInternalContext *)sock->protocol->context;
2168 if (proto_ctx->packet)
2169 silc_packet_context_free(proto_ctx->packet);
2171 proto_ctx->packet = silc_packet_context_dup(packet);
2173 /* Let the protocol handle the packet */
2174 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2176 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2177 "protocol active, packet dropped."));
2181 case SILC_PACKET_FTP:
2183 SILC_LOG_DEBUG(("FTP packet"));
2184 if (packet->flags & SILC_PACKET_FLAG_LIST)
2186 silc_server_ftp(server, sock, packet);
2189 case SILC_PACKET_RESUME_ROUTER:
2190 /* Resume router packet received. This packet is received for backup
2191 router resuming protocol. */
2192 SILC_LOG_DEBUG(("Resume router packet"));
2193 if (packet->flags & SILC_PACKET_FLAG_LIST)
2195 silc_server_backup_resume_router(server, sock, packet);
2199 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2205 /* Creates connection to a remote router. */
2207 void silc_server_create_connection(SilcServer server,
2208 char *remote_host, uint32 port)
2210 SilcServerConnection sconn;
2212 /* Allocate connection object for hold connection specific stuff. */
2213 sconn = silc_calloc(1, sizeof(*sconn));
2214 sconn->server = server;
2215 sconn->remote_host = strdup(remote_host);
2216 sconn->remote_port = port;
2218 silc_schedule_task_add(server->schedule, 0,
2219 silc_server_connect_router,
2220 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2221 SILC_TASK_PRI_NORMAL);
2224 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2226 silc_socket_free((SilcSocketConnection)context);
2229 /* Closes connection to socket connection */
2231 void silc_server_close_connection(SilcServer server,
2232 SilcSocketConnection sock)
2234 if (!server->sockets[sock->sock])
2237 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2239 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2240 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2241 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2244 /* We won't listen for this connection anymore */
2245 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2247 /* Unregister all tasks */
2248 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2250 /* Close the actual connection */
2251 silc_net_close_connection(sock->sock);
2252 server->sockets[sock->sock] = NULL;
2254 /* If sock->user_data is NULL then we'll check for active protocols
2255 here since the silc_server_free_sock_user_data has not been called
2256 for this connection. */
2257 if (!sock->user_data) {
2258 /* If any protocol is active cancel its execution. It will call
2259 the final callback which will finalize the disconnection. */
2260 if (sock->protocol) {
2261 silc_protocol_cancel(sock->protocol, server->schedule);
2262 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2263 silc_protocol_execute_final(sock->protocol, server->schedule);
2264 sock->protocol = NULL;
2269 silc_schedule_task_add(server->schedule, 0,
2270 silc_server_close_connection_final,
2271 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2272 SILC_TASK_PRI_NORMAL);
2275 /* Sends disconnect message to remote connection and disconnects the
2278 void silc_server_disconnect_remote(SilcServer server,
2279 SilcSocketConnection sock,
2280 const char *fmt, ...)
2283 unsigned char buf[4096];
2288 memset(buf, 0, sizeof(buf));
2290 vsprintf(buf, fmt, ap);
2293 SILC_LOG_DEBUG(("Disconnecting remote host"));
2295 /* Notify remote end that the conversation is over. The notify message
2296 is tried to be sent immediately. */
2297 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2298 buf, strlen(buf), TRUE);
2300 /* Mark the connection to be disconnected */
2301 SILC_SET_DISCONNECTED(sock);
2302 silc_server_close_connection(server, sock);
2307 SilcClientEntry client;
2308 } *FreeClientInternal;
2310 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2312 FreeClientInternal i = (FreeClientInternal)context;
2314 silc_idlist_del_data(i->client);
2315 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2319 /* Frees client data and notifies about client's signoff. */
2321 void silc_server_free_client_data(SilcServer server,
2322 SilcSocketConnection sock,
2323 SilcClientEntry client,
2325 const char *signoff)
2327 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2329 /* If there is pending outgoing data for the client then purge it
2330 to the network before removing the client entry. */
2331 silc_server_packet_queue_purge(server, sock);
2336 /* Send SIGNOFF notify to routers. */
2337 if (notify && !server->standalone && server->router)
2338 silc_server_send_notify_signoff(server, server->router->connection,
2339 server->server_type == SILC_SERVER ?
2340 FALSE : TRUE, client->id, signoff);
2342 /* Remove client from all channels */
2344 silc_server_remove_from_channels(server, NULL, client,
2345 TRUE, (char *)signoff, TRUE);
2347 silc_server_remove_from_channels(server, NULL, client,
2348 FALSE, NULL, FALSE);
2350 /* We will not delete the client entry right away. We will take it
2351 into history (for WHOWAS command) for 5 minutes */
2354 silc_schedule_task_add(server->schedule, 0,
2355 silc_server_free_client_data_timeout,
2357 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2358 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2359 client->router = NULL;
2360 client->connection = NULL;
2362 /* Free the client entry and everything in it */
2363 server->stat.my_clients--;
2364 server->stat.clients--;
2365 if (server->server_type == SILC_ROUTER)
2366 server->stat.cell_clients--;
2369 /* Frees user_data pointer from socket connection object. This also sends
2370 appropriate notify packets to the network to inform about leaving
2373 void silc_server_free_sock_user_data(SilcServer server,
2374 SilcSocketConnection sock,
2375 const char *signoff_message)
2377 SILC_LOG_DEBUG(("Start"));
2379 switch (sock->type) {
2380 case SILC_SOCKET_TYPE_CLIENT:
2382 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2383 silc_server_free_client_data(server, sock, user_data, TRUE,
2387 case SILC_SOCKET_TYPE_SERVER:
2388 case SILC_SOCKET_TYPE_ROUTER:
2390 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2391 SilcServerEntry backup_router = NULL;
2394 backup_router = silc_server_backup_get(server, user_data->id);
2396 /* If this was our primary router connection then we're lost to
2397 the outside world. */
2398 if (server->router == user_data) {
2399 /* Check whether we have a backup router connection */
2400 if (!backup_router || backup_router == user_data) {
2401 silc_schedule_task_add(server->schedule, 0,
2402 silc_server_connect_to_router,
2405 SILC_TASK_PRI_NORMAL);
2407 server->id_entry->router = NULL;
2408 server->router = NULL;
2409 server->standalone = TRUE;
2410 backup_router = NULL;
2412 SILC_LOG_INFO(("New primary router is backup router %s",
2413 backup_router->server_name));
2414 SILC_LOG_DEBUG(("New primary router is backup router %s",
2415 backup_router->server_name));
2416 server->id_entry->router = backup_router;
2417 server->router = backup_router;
2418 server->router_connect = time(0);
2419 server->backup_primary = TRUE;
2420 if (server->server_type == SILC_BACKUP_ROUTER) {
2421 server->server_type = SILC_ROUTER;
2423 /* We'll need to constantly try to reconnect to the primary
2424 router so that we'll see when it comes back online. */
2425 silc_server_backup_reconnect(server, sock->ip, sock->port,
2426 silc_server_backup_connected,
2430 /* Mark this connection as replaced */
2431 silc_server_backup_replaced_add(server, user_data->id,
2434 } else if (backup_router) {
2435 SILC_LOG_INFO(("Enabling the use of backup router %s",
2436 backup_router->server_name));
2437 SILC_LOG_DEBUG(("Enabling the use of backup router %s",
2438 backup_router->server_name));
2440 /* Mark this connection as replaced */
2441 silc_server_backup_replaced_add(server, user_data->id,
2445 if (!backup_router) {
2446 /* Free all client entries that this server owns as they will
2447 become invalid now as well. */
2449 silc_server_remove_clients_by_server(server, user_data, TRUE);
2450 if (server->server_type == SILC_SERVER)
2451 silc_server_remove_channels_by_server(server, user_data);
2453 /* Update the client entries of this server to the new backup
2454 router. This also removes the clients that *really* was owned
2455 by the primary router and went down with the router. */
2456 silc_server_update_clients_by_server(server, user_data, backup_router,
2458 silc_server_update_servers_by_server(server, user_data, backup_router);
2459 if (server->server_type == SILC_SERVER)
2460 silc_server_update_channels_by_server(server, user_data,
2464 /* Free the server entry */
2465 silc_server_backup_del(server, user_data);
2466 silc_server_backup_replaced_del(server, user_data);
2467 silc_idlist_del_data(user_data);
2468 if (!silc_idlist_del_server(server->local_list, user_data))
2469 silc_idlist_del_server(server->global_list, user_data);
2470 server->stat.my_servers--;
2471 server->stat.servers--;
2472 if (server->server_type == SILC_ROUTER)
2473 server->stat.cell_servers--;
2475 if (backup_router) {
2476 /* Announce all of our stuff that was created about 5 minutes ago.
2477 The backup router knows all the other stuff already. */
2478 if (server->server_type == SILC_ROUTER)
2479 silc_server_announce_servers(server, FALSE, time(0) - 300,
2480 backup_router->connection);
2482 /* Announce our clients and channels to the router */
2483 silc_server_announce_clients(server, time(0) - 300,
2484 backup_router->connection);
2485 silc_server_announce_channels(server, time(0) - 300,
2486 backup_router->connection);
2492 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2494 silc_idlist_del_data(user_data);
2495 silc_free(user_data);
2500 /* If any protocol is active cancel its execution */
2501 if (sock->protocol) {
2502 silc_protocol_cancel(sock->protocol, server->schedule);
2503 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2504 silc_protocol_execute_final(sock->protocol, server->schedule);
2505 sock->protocol = NULL;
2508 sock->user_data = NULL;
2511 /* Removes client from all channels it has joined. This is used when client
2512 connection is disconnected. If the client on a channel is last, the
2513 channel is removed as well. This sends the SIGNOFF notify types. */
2515 void silc_server_remove_from_channels(SilcServer server,
2516 SilcSocketConnection sock,
2517 SilcClientEntry client,
2519 char *signoff_message,
2522 SilcChannelEntry channel;
2523 SilcChannelClientEntry chl;
2524 SilcHashTableList htl;
2527 SILC_LOG_DEBUG(("Start"));
2529 if (!client || !client->id)
2532 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2534 /* Remove the client from all channels. The client is removed from
2535 the channels' user list. */
2536 silc_hash_table_list(client->channels, &htl);
2537 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2538 channel = chl->channel;
2540 /* Remove channel from client's channel list */
2541 silc_hash_table_del(client->channels, channel);
2543 /* Remove channel if there is no users anymore */
2544 if (server->server_type == SILC_ROUTER &&
2545 silc_hash_table_count(channel->user_list) < 2) {
2547 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2548 if (silc_idlist_del_channel(server->local_list, channel))
2549 server->stat.my_channels--;
2551 silc_idlist_del_channel(server->global_list, channel);
2555 /* Remove client from channel's client list */
2556 silc_hash_table_del(channel->user_list, chl->client);
2558 /* If there is no global users on the channel anymore mark the channel
2559 as local channel. Do not check if the removed client is local client. */
2560 if (server->server_type != SILC_ROUTER && channel->global_users &&
2561 chl->client->router && !silc_server_channel_has_global(channel))
2562 channel->global_users = FALSE;
2565 server->stat.my_chanclients--;
2567 /* If there is not at least one local user on the channel then we don't
2568 need the channel entry anymore, we can remove it safely. */
2569 if (server->server_type != SILC_ROUTER &&
2570 !silc_server_channel_has_local(channel)) {
2571 /* Notify about leaving client if this channel has global users. */
2572 if (notify && channel->global_users)
2573 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2574 SILC_NOTIFY_TYPE_SIGNOFF,
2575 signoff_message ? 2 : 1,
2576 clidp->data, clidp->len,
2577 signoff_message, signoff_message ?
2578 strlen(signoff_message) : 0);
2581 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2583 if (channel->founder_key) {
2584 /* The founder auth data exists, do not remove the channel entry */
2585 SilcChannelClientEntry chl2;
2586 SilcHashTableList htl2;
2588 channel->disabled = TRUE;
2590 silc_hash_table_list(channel->user_list, &htl2);
2591 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2592 silc_hash_table_del(chl2->client->channels, channel);
2593 silc_hash_table_del(channel->user_list, chl2->client);
2599 /* Remove the channel entry */
2600 if (silc_idlist_del_channel(server->local_list, channel))
2601 server->stat.my_channels--;
2603 silc_idlist_del_channel(server->global_list, channel);
2607 /* Send notify to channel about client leaving SILC and thus
2608 the entire channel. */
2610 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2611 SILC_NOTIFY_TYPE_SIGNOFF,
2612 signoff_message ? 2 : 1,
2613 clidp->data, clidp->len,
2614 signoff_message, signoff_message ?
2615 strlen(signoff_message) : 0);
2617 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2618 /* Re-generate channel key */
2619 if (!silc_server_create_channel_key(server, channel, 0))
2622 /* Send the channel key to the channel. The key of course is not sent
2623 to the client who was removed from the channel. */
2624 silc_server_send_channel_key(server, client->connection, channel,
2625 server->server_type == SILC_ROUTER ?
2626 FALSE : !server->standalone);
2630 silc_buffer_free(clidp);
2633 /* Removes client from one channel. This is used for example when client
2634 calls LEAVE command to remove itself from the channel. Returns TRUE
2635 if channel still exists and FALSE if the channel is removed when
2636 last client leaves the channel. If `notify' is FALSE notify messages
2639 int silc_server_remove_from_one_channel(SilcServer server,
2640 SilcSocketConnection sock,
2641 SilcChannelEntry channel,
2642 SilcClientEntry client,
2645 SilcChannelClientEntry chl;
2648 SILC_LOG_DEBUG(("Start"));
2650 /* Get the entry to the channel, if this client is not on the channel
2652 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2655 /* Remove the client from the channel. The client is removed from
2656 the channel's user list. */
2658 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2660 /* Remove channel from client's channel list */
2661 silc_hash_table_del(client->channels, chl->channel);
2663 /* Remove channel if there is no users anymore */
2664 if (server->server_type == SILC_ROUTER &&
2665 silc_hash_table_count(channel->user_list) < 2) {
2667 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2668 if (silc_idlist_del_channel(server->local_list, channel))
2669 server->stat.my_channels--;
2671 silc_idlist_del_channel(server->global_list, channel);
2672 silc_buffer_free(clidp);
2676 /* Remove client from channel's client list */
2677 silc_hash_table_del(channel->user_list, chl->client);
2679 /* If there is no global users on the channel anymore mark the channel
2680 as local channel. Do not check if the client is local client. */
2681 if (server->server_type != SILC_ROUTER && channel->global_users &&
2682 chl->client->router && !silc_server_channel_has_global(channel))
2683 channel->global_users = FALSE;
2686 server->stat.my_chanclients--;
2688 /* If there is not at least one local user on the channel then we don't
2689 need the channel entry anymore, we can remove it safely. */
2690 if (server->server_type != SILC_ROUTER &&
2691 !silc_server_channel_has_local(channel)) {
2692 /* Notify about leaving client if this channel has global users. */
2693 if (notify && channel->global_users)
2694 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2695 SILC_NOTIFY_TYPE_LEAVE, 1,
2696 clidp->data, clidp->len);
2698 silc_buffer_free(clidp);
2701 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2703 if (channel->founder_key) {
2704 /* The founder auth data exists, do not remove the channel entry */
2705 SilcChannelClientEntry chl2;
2706 SilcHashTableList htl2;
2708 channel->disabled = TRUE;
2710 silc_hash_table_list(channel->user_list, &htl2);
2711 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2712 silc_hash_table_del(chl2->client->channels, channel);
2713 silc_hash_table_del(channel->user_list, chl2->client);
2719 /* Remove the channel entry */
2720 if (silc_idlist_del_channel(server->local_list, channel))
2721 server->stat.my_channels--;
2723 silc_idlist_del_channel(server->global_list, channel);
2727 /* Send notify to channel about client leaving the channel */
2729 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2730 SILC_NOTIFY_TYPE_LEAVE, 1,
2731 clidp->data, clidp->len);
2733 silc_buffer_free(clidp);
2737 /* Timeout callback. This is called if connection is idle or for some
2738 other reason is not responding within some period of time. This
2739 disconnects the remote end. */
2741 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2743 SilcServer server = (SilcServer)context;
2744 SilcSocketConnection sock = server->sockets[fd];
2746 SILC_LOG_DEBUG(("Start"));
2751 /* If we have protocol active we must assure that we call the protocol's
2752 final callback so that all the memory is freed. */
2753 if (sock->protocol) {
2754 silc_protocol_cancel(sock->protocol, server->schedule);
2755 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2756 silc_protocol_execute_final(sock->protocol, server->schedule);
2757 sock->protocol = NULL;
2761 if (sock->user_data)
2762 silc_server_free_sock_user_data(server, sock, NULL);
2764 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2765 "Connection timeout");
2768 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2769 function may be used only by router. In real SILC network all channels
2770 are created by routers thus this function is never used by normal
2773 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2774 SilcServerID *router_id,
2780 SilcChannelID *channel_id;
2781 SilcChannelEntry entry;
2785 SILC_LOG_DEBUG(("Creating new channel"));
2788 cipher = SILC_DEFAULT_CIPHER;
2790 hmac = SILC_DEFAULT_HMAC;
2792 /* Allocate cipher */
2793 if (!silc_cipher_alloc(cipher, &key))
2797 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2798 silc_cipher_free(key);
2802 channel_name = strdup(channel_name);
2804 /* Create the channel */
2805 if (!silc_id_create_channel_id(server, router_id, server->rng,
2807 silc_free(channel_name);
2808 silc_cipher_free(key);
2809 silc_hmac_free(newhmac);
2812 entry = silc_idlist_add_channel(server->local_list, channel_name,
2813 SILC_CHANNEL_MODE_NONE, channel_id,
2814 NULL, key, newhmac, 0);
2816 silc_free(channel_name);
2817 silc_cipher_free(key);
2818 silc_hmac_free(newhmac);
2822 entry->cipher = strdup(cipher);
2823 entry->hmac_name = strdup(hmac);
2825 /* Now create the actual key material */
2826 if (!silc_server_create_channel_key(server, entry,
2827 silc_cipher_get_key_len(key) / 8)) {
2828 silc_free(channel_name);
2829 silc_cipher_free(key);
2830 silc_hmac_free(newhmac);
2831 silc_free(entry->cipher);
2832 silc_free(entry->hmac_name);
2836 /* Notify other routers about the new channel. We send the packet
2837 to our primary route. */
2838 if (broadcast && server->standalone == FALSE)
2839 silc_server_send_new_channel(server, server->router->connection, TRUE,
2840 channel_name, entry->id,
2841 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2844 server->stat.my_channels++;
2849 /* Same as above but creates the channel with Channel ID `channel_id. */
2852 silc_server_create_new_channel_with_id(SilcServer server,
2856 SilcChannelID *channel_id,
2859 SilcChannelEntry entry;
2863 SILC_LOG_DEBUG(("Creating new channel"));
2866 cipher = SILC_DEFAULT_CIPHER;
2868 hmac = SILC_DEFAULT_HMAC;
2870 /* Allocate cipher */
2871 if (!silc_cipher_alloc(cipher, &key))
2875 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2876 silc_cipher_free(key);
2880 channel_name = strdup(channel_name);
2882 /* Create the channel */
2883 entry = silc_idlist_add_channel(server->local_list, channel_name,
2884 SILC_CHANNEL_MODE_NONE, channel_id,
2885 NULL, key, newhmac, 0);
2887 silc_free(channel_name);
2891 /* Now create the actual key material */
2892 if (!silc_server_create_channel_key(server, entry,
2893 silc_cipher_get_key_len(key) / 8)) {
2894 silc_free(channel_name);
2898 /* Notify other routers about the new channel. We send the packet
2899 to our primary route. */
2900 if (broadcast && server->standalone == FALSE)
2901 silc_server_send_new_channel(server, server->router->connection, TRUE,
2902 channel_name, entry->id,
2903 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2906 server->stat.my_channels++;
2911 /* Channel's key re-key timeout callback. */
2913 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2915 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2916 SilcServer server = (SilcServer)rekey->context;
2920 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
2923 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2926 /* Generates new channel key. This is used to create the initial channel key
2927 but also to re-generate new key for channel. If `key_len' is provided
2928 it is the bytes of the key length. */
2930 bool silc_server_create_channel_key(SilcServer server,
2931 SilcChannelEntry channel,
2935 unsigned char channel_key[32], hash[32];
2938 SILC_LOG_DEBUG(("Generating channel key"));
2940 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2941 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2945 if (!channel->channel_key)
2946 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key)) {
2947 channel->channel_key = NULL;
2953 else if (channel->key_len)
2954 len = channel->key_len / 8;
2956 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2958 /* Create channel key */
2959 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2962 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2964 /* Remove old key if exists */
2966 memset(channel->key, 0, channel->key_len / 8);
2967 silc_free(channel->key);
2971 channel->key_len = len * 8;
2972 channel->key = silc_calloc(len, sizeof(*channel->key));
2973 memcpy(channel->key, channel_key, len);
2974 memset(channel_key, 0, sizeof(channel_key));
2976 /* Generate HMAC key from the channel key data and set it */
2978 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
2979 silc_hash_make(silc_hmac_get_hash(channel->hmac), channel->key, len, hash);
2980 silc_hmac_set_key(channel->hmac, hash,
2981 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
2982 memset(hash, 0, sizeof(hash));
2984 if (server->server_type == SILC_ROUTER) {
2985 if (!channel->rekey)
2986 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2987 channel->rekey->context = (void *)server;
2988 channel->rekey->channel = channel;
2989 channel->rekey->key_len = key_len;
2990 if (channel->rekey->task)
2991 silc_schedule_task_del(server->schedule, channel->rekey->task);
2993 channel->rekey->task =
2994 silc_schedule_task_add(server->schedule, 0,
2995 silc_server_channel_key_rekey,
2996 (void *)channel->rekey, 3600, 0,
2998 SILC_TASK_PRI_NORMAL);
3004 /* Saves the channel key found in the encoded `key_payload' buffer. This
3005 function is used when we receive Channel Key Payload and also when we're
3006 processing JOIN command reply. Returns entry to the channel. */
3008 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3009 SilcBuffer key_payload,
3010 SilcChannelEntry channel)
3012 SilcChannelKeyPayload payload = NULL;
3013 SilcChannelID *id = NULL;
3014 unsigned char *tmp, hash[32];
3018 SILC_LOG_DEBUG(("Start"));
3020 /* Decode channel key payload */
3021 payload = silc_channel_key_payload_parse(key_payload->data,
3024 SILC_LOG_ERROR(("Bad channel key payload received, dropped"));
3029 /* Get the channel entry */
3032 /* Get channel ID */
3033 tmp = silc_channel_key_get_id(payload, &tmp_len);
3034 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3040 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3042 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3044 SILC_LOG_ERROR(("Received key for non-existent channel"));
3050 tmp = silc_channel_key_get_key(payload, &tmp_len);
3056 cipher = silc_channel_key_get_cipher(payload, NULL);
3062 /* Remove old key if exists */
3064 memset(channel->key, 0, channel->key_len / 8);
3065 silc_free(channel->key);
3066 silc_cipher_free(channel->channel_key);
3069 /* Create new cipher */
3070 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3071 channel->channel_key = NULL;
3076 if (channel->cipher)
3077 silc_free(channel->cipher);
3078 channel->cipher = strdup(cipher);
3081 channel->key_len = tmp_len * 8;
3082 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3083 memcpy(channel->key, tmp, tmp_len);
3084 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3086 /* Generate HMAC key from the channel key data and set it */
3088 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3089 silc_hash_make(silc_hmac_get_hash(channel->hmac), tmp, tmp_len, hash);
3090 silc_hmac_set_key(channel->hmac, hash,
3091 silc_hash_len(silc_hmac_get_hash(channel->hmac)));
3093 memset(hash, 0, sizeof(hash));
3094 memset(tmp, 0, tmp_len);
3096 if (server->server_type == SILC_ROUTER) {
3097 if (!channel->rekey)
3098 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3099 channel->rekey->context = (void *)server;
3100 channel->rekey->channel = channel;
3101 if (channel->rekey->task)
3102 silc_schedule_task_del(server->schedule, channel->rekey->task);
3104 channel->rekey->task =
3105 silc_schedule_task_add(server->schedule, 0,
3106 silc_server_channel_key_rekey,
3107 (void *)channel->rekey, 3600, 0,
3109 SILC_TASK_PRI_NORMAL);
3115 silc_channel_key_payload_free(payload);
3120 /* Heartbeat callback. This function is set as argument for the
3121 silc_socket_set_heartbeat function. The library will call this function
3122 at the set time interval. */
3124 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3127 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3129 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3132 /* Send the heartbeat */
3133 silc_server_send_heartbeat(hb->server, sock);
3136 /* Returns assembled of all servers in the given ID list. The packet's
3137 form is dictated by the New ID payload. */
3139 static void silc_server_announce_get_servers(SilcServer server,
3140 SilcServerEntry remote,
3142 SilcBuffer *servers,
3143 unsigned long creation_time)
3145 SilcIDCacheList list;
3146 SilcIDCacheEntry id_cache;
3147 SilcServerEntry entry;
3150 /* Go through all clients in the list */
3151 if (silc_idcache_get_all(id_list->servers, &list)) {
3152 if (silc_idcache_list_first(list, &id_cache)) {
3154 entry = (SilcServerEntry)id_cache->context;
3156 /* Do not announce the one we've sending our announcements and
3157 do not announce ourself. Also check the creation time if it's
3159 if ((entry == remote) || (entry == server->id_entry) ||
3160 (creation_time && entry->data.created < creation_time)) {
3161 if (!silc_idcache_list_next(list, &id_cache))
3166 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3168 *servers = silc_buffer_realloc(*servers,
3170 (*servers)->truelen + idp->len :
3172 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3173 silc_buffer_put(*servers, idp->data, idp->len);
3174 silc_buffer_pull(*servers, idp->len);
3175 silc_buffer_free(idp);
3177 if (!silc_idcache_list_next(list, &id_cache))
3182 silc_idcache_list_free(list);
3187 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3193 p = silc_notify_payload_encode(notify, argc, ap);
3199 /* This function is used by router to announce existing servers to our
3200 primary router when we've connected to it. If `creation_time' is non-zero
3201 then only the servers that has been created after the `creation_time'
3202 will be announced. */
3204 void silc_server_announce_servers(SilcServer server, bool global,
3205 unsigned long creation_time,
3206 SilcSocketConnection remote)
3208 SilcBuffer servers = NULL;
3210 SILC_LOG_DEBUG(("Announcing servers"));
3212 /* Get servers in local list */
3213 silc_server_announce_get_servers(server, remote->user_data,
3214 server->local_list, &servers,
3218 /* Get servers in global list */
3219 silc_server_announce_get_servers(server, remote->user_data,
3220 server->global_list, &servers,
3224 silc_buffer_push(servers, servers->data - servers->head);
3225 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3227 /* Send the packet */
3228 silc_server_packet_send(server, remote,
3229 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3230 servers->data, servers->len, TRUE);
3232 silc_buffer_free(servers);
3236 /* Returns assembled packet of all clients in the given ID list. The
3237 packet's form is dictated by the New ID Payload. */
3239 static void silc_server_announce_get_clients(SilcServer server,
3241 SilcBuffer *clients,
3243 unsigned long creation_time)
3245 SilcIDCacheList list;
3246 SilcIDCacheEntry id_cache;
3247 SilcClientEntry client;
3250 unsigned char mode[4];
3252 /* Go through all clients in the list */
3253 if (silc_idcache_get_all(id_list->clients, &list)) {
3254 if (silc_idcache_list_first(list, &id_cache)) {
3256 client = (SilcClientEntry)id_cache->context;
3258 if (creation_time && client->data.created < creation_time) {
3259 if (!silc_idcache_list_next(list, &id_cache))
3264 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3266 *clients = silc_buffer_realloc(*clients,
3268 (*clients)->truelen + idp->len :
3270 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3271 silc_buffer_put(*clients, idp->data, idp->len);
3272 silc_buffer_pull(*clients, idp->len);
3274 SILC_PUT32_MSB(client->mode, mode);
3275 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_UMODE_CHANGE,
3276 2, idp->data, idp->len,
3278 *umodes = silc_buffer_realloc(*umodes,
3280 (*umodes)->truelen + tmp->len :
3282 silc_buffer_pull_tail(*umodes, ((*umodes)->end - (*umodes)->data));
3283 silc_buffer_put(*umodes, tmp->data, tmp->len);
3284 silc_buffer_pull(*umodes, tmp->len);
3285 silc_buffer_free(tmp);
3287 silc_buffer_free(idp);
3289 if (!silc_idcache_list_next(list, &id_cache))
3294 silc_idcache_list_free(list);
3298 /* This function is used to announce our existing clients to our router
3299 when we've connected to it. If `creation_time' is non-zero then only
3300 the clients that has been created after the `creation_time' will be
3303 void silc_server_announce_clients(SilcServer server,
3304 unsigned long creation_time,
3305 SilcSocketConnection remote)
3307 SilcBuffer clients = NULL;
3308 SilcBuffer umodes = NULL;
3310 SILC_LOG_DEBUG(("Announcing clients"));
3312 /* Get clients in local list */
3313 silc_server_announce_get_clients(server, server->local_list,
3314 &clients, &umodes, creation_time);
3316 /* As router we announce our global list as well */
3317 if (server->server_type == SILC_ROUTER)
3318 silc_server_announce_get_clients(server, server->global_list,
3319 &clients, &umodes, creation_time);
3322 silc_buffer_push(clients, clients->data - clients->head);
3323 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3325 /* Send the packet */
3326 silc_server_packet_send(server, remote,
3327 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3328 clients->data, clients->len, TRUE);
3330 silc_buffer_free(clients);
3334 silc_buffer_push(umodes, umodes->data - umodes->head);
3335 SILC_LOG_HEXDUMP(("umodes"), umodes->data, umodes->len);
3337 /* Send the packet */
3338 silc_server_packet_send(server, remote,
3339 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3340 umodes->data, umodes->len, TRUE);
3342 silc_buffer_free(umodes);
3346 /* Returns channel's topic for announcing it */
3348 void silc_server_announce_get_channel_topic(SilcServer server,
3349 SilcChannelEntry channel,
3354 if (channel->topic) {
3355 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3356 *topic = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_TOPIC_SET, 2,
3357 chidp->data, chidp->len,
3359 strlen(channel->topic));
3360 silc_buffer_free(chidp);
3364 /* Returns assembled packets for channel users of the `channel'. */
3366 void silc_server_announce_get_channel_users(SilcServer server,
3367 SilcChannelEntry channel,
3368 SilcBuffer *channel_users,
3369 SilcBuffer *channel_users_modes)
3371 SilcChannelClientEntry chl;
3372 SilcHashTableList htl;
3373 SilcBuffer chidp, clidp;
3376 unsigned char mode[4];
3378 SILC_LOG_DEBUG(("Start"));
3380 /* Now find all users on the channel */
3381 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3382 silc_hash_table_list(channel->user_list, &htl);
3383 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3384 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3387 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3388 clidp->data, clidp->len,
3389 chidp->data, chidp->len);
3392 silc_buffer_realloc(*channel_users,
3394 (*channel_users)->truelen + len : len));
3395 silc_buffer_pull_tail(*channel_users,
3396 ((*channel_users)->end -
3397 (*channel_users)->data));
3399 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3400 silc_buffer_pull(*channel_users, len);
3401 silc_buffer_free(tmp);
3403 /* CUMODE notify for mode change on the channel */
3404 SILC_PUT32_MSB(chl->mode, mode);
3405 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3406 3, clidp->data, clidp->len,
3408 clidp->data, clidp->len);
3410 *channel_users_modes =
3411 silc_buffer_realloc(*channel_users_modes,
3412 (*channel_users_modes ?
3413 (*channel_users_modes)->truelen + len : len));
3414 silc_buffer_pull_tail(*channel_users_modes,
3415 ((*channel_users_modes)->end -
3416 (*channel_users_modes)->data));
3418 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3419 silc_buffer_pull(*channel_users_modes, len);
3420 silc_buffer_free(tmp);
3422 silc_buffer_free(clidp);
3424 silc_buffer_free(chidp);
3427 /* Returns assembled packets for all channels and users on those channels
3428 from the given ID List. The packets are in the form dictated by the
3429 New Channel and New Channel User payloads. */
3431 void silc_server_announce_get_channels(SilcServer server,
3433 SilcBuffer *channels,
3434 SilcBuffer *channel_users,
3435 SilcBuffer **channel_users_modes,
3436 uint32 *channel_users_modes_c,
3437 SilcBuffer **channel_topics,
3438 SilcChannelID ***channel_ids,
3439 unsigned long creation_time)
3441 SilcIDCacheList list;
3442 SilcIDCacheEntry id_cache;
3443 SilcChannelEntry channel;
3448 int i = *channel_users_modes_c;
3451 SILC_LOG_DEBUG(("Start"));
3453 /* Go through all channels in the list */
3454 if (silc_idcache_get_all(id_list->channels, &list)) {
3455 if (silc_idcache_list_first(list, &id_cache)) {
3457 channel = (SilcChannelEntry)id_cache->context;
3459 if (creation_time && channel->created < creation_time)
3464 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3465 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3466 name_len = strlen(channel->channel_name);
3469 len = 4 + name_len + id_len + 4;
3471 silc_buffer_realloc(*channels,
3472 (*channels ? (*channels)->truelen +
3474 silc_buffer_pull_tail(*channels,
3475 ((*channels)->end - (*channels)->data));
3476 silc_buffer_format(*channels,
3477 SILC_STR_UI_SHORT(name_len),
3478 SILC_STR_UI_XNSTRING(channel->channel_name,
3480 SILC_STR_UI_SHORT(id_len),
3481 SILC_STR_UI_XNSTRING(cid, id_len),
3482 SILC_STR_UI_INT(channel->mode),
3484 silc_buffer_pull(*channels, len);
3487 /* Channel user modes */
3488 *channel_users_modes = silc_realloc(*channel_users_modes,
3489 sizeof(**channel_users_modes) *
3491 (*channel_users_modes)[i] = NULL;
3492 *channel_ids = silc_realloc(*channel_ids,
3493 sizeof(**channel_ids) * (i + 1));
3494 (*channel_ids)[i] = NULL;
3495 silc_server_announce_get_channel_users(server, channel,
3497 &(*channel_users_modes)[i]);
3498 (*channel_ids)[i] = channel->id;
3500 /* Channel's topic */
3501 *channel_topics = silc_realloc(*channel_topics,
3502 sizeof(**channel_topics) * (i + 1));
3503 (*channel_topics)[i] = NULL;
3504 silc_server_announce_get_channel_topic(server, channel,
3505 &(*channel_topics)[i]);
3508 if (!silc_idcache_list_next(list, &id_cache))
3512 *channel_users_modes_c += i;
3515 silc_idcache_list_free(list);
3519 /* This function is used to announce our existing channels to our router
3520 when we've connected to it. This also announces the users on the
3521 channels to the router. If the `creation_time' is non-zero only the
3522 channels that was created after the `creation_time' are announced.
3523 Note that the channel users are still announced even if the `creation_time'
3526 void silc_server_announce_channels(SilcServer server,
3527 unsigned long creation_time,
3528 SilcSocketConnection remote)
3530 SilcBuffer channels = NULL, channel_users = NULL;
3531 SilcBuffer *channel_users_modes = NULL;
3532 SilcBuffer *channel_topics = NULL;
3533 uint32 channel_users_modes_c = 0;
3534 SilcChannelID **channel_ids = NULL;
3536 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3538 /* Get channels and channel users in local list */
3539 silc_server_announce_get_channels(server, server->local_list,
3540 &channels, &channel_users,
3541 &channel_users_modes,
3542 &channel_users_modes_c,
3544 &channel_ids, creation_time);
3546 /* Get channels and channel users in global list */
3547 if (server->server_type != SILC_SERVER)
3548 silc_server_announce_get_channels(server, server->global_list,
3549 &channels, &channel_users,
3550 &channel_users_modes,
3551 &channel_users_modes_c,
3553 &channel_ids, creation_time);
3556 silc_buffer_push(channels, channels->data - channels->head);
3557 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3559 /* Send the packet */
3560 silc_server_packet_send(server, remote,
3561 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3562 channels->data, channels->len,
3565 silc_buffer_free(channels);
3568 if (channel_users) {
3569 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3570 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3571 channel_users->len);
3573 /* Send the packet */
3574 silc_server_packet_send(server, remote,
3575 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3576 channel_users->data, channel_users->len,
3579 silc_buffer_free(channel_users);
3582 if (channel_users_modes) {
3585 for (i = 0; i < channel_users_modes_c; i++) {
3586 silc_buffer_push(channel_users_modes[i],
3587 channel_users_modes[i]->data -
3588 channel_users_modes[i]->head);
3589 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3590 channel_users_modes[i]->len);
3591 silc_server_packet_send_dest(server, remote,
3592 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3593 channel_ids[i], SILC_ID_CHANNEL,
3594 channel_users_modes[i]->data,
3595 channel_users_modes[i]->len,
3597 silc_buffer_free(channel_users_modes[i]);
3599 silc_free(channel_users_modes);
3602 if (channel_topics) {
3605 for (i = 0; i < channel_users_modes_c; i++) {
3606 if (!channel_topics[i])
3609 silc_buffer_push(channel_topics[i],
3610 channel_topics[i]->data -
3611 channel_topics[i]->head);
3612 SILC_LOG_HEXDUMP(("channel topic"), channel_topics[i]->data,
3613 channel_topics[i]->len);
3614 silc_server_packet_send_dest(server, remote,
3615 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3616 channel_ids[i], SILC_ID_CHANNEL,
3617 channel_topics[i]->data,
3618 channel_topics[i]->len,
3620 silc_buffer_free(channel_topics[i]);
3622 silc_free(channel_topics);
3625 silc_free(channel_ids);
3628 /* Failure timeout callback. If this is called then we will immediately
3629 process the received failure. We always process the failure with timeout
3630 since we do not want to blindly trust to received failure packets.
3631 This won't be called (the timeout is cancelled) if the failure was
3632 bogus (it is bogus if remote does not close the connection after sending
3635 SILC_TASK_CALLBACK(silc_server_failure_callback)
3637 SilcServerFailureContext f = (SilcServerFailureContext)context;
3639 if (f->sock->protocol) {
3640 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3641 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3647 /* Assembles user list and users mode list from the `channel'. */
3649 void silc_server_get_users_on_channel(SilcServer server,
3650 SilcChannelEntry channel,
3651 SilcBuffer *user_list,
3652 SilcBuffer *mode_list,
3655 SilcChannelClientEntry chl;
3656 SilcHashTableList htl;
3657 SilcBuffer client_id_list;
3658 SilcBuffer client_mode_list;
3660 uint32 list_count = 0, len = 0;
3662 silc_hash_table_list(channel->user_list, &htl);
3663 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3664 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3666 client_id_list = silc_buffer_alloc(len);
3668 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3669 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3670 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3672 silc_hash_table_list(channel->user_list, &htl);
3673 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3675 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3676 silc_buffer_put(client_id_list, idp->data, idp->len);
3677 silc_buffer_pull(client_id_list, idp->len);
3678 silc_buffer_free(idp);
3680 /* Client's mode on channel */
3681 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3682 silc_buffer_pull(client_mode_list, 4);
3686 silc_buffer_push(client_id_list,
3687 client_id_list->data - client_id_list->head);
3688 silc_buffer_push(client_mode_list,
3689 client_mode_list->data - client_mode_list->head);
3691 *user_list = client_id_list;
3692 *mode_list = client_mode_list;
3693 *user_count = list_count;
3696 /* Saves users and their modes to the `channel'. */
3698 void silc_server_save_users_on_channel(SilcServer server,
3699 SilcSocketConnection sock,
3700 SilcChannelEntry channel,
3701 SilcClientID *noadd,
3702 SilcBuffer user_list,
3703 SilcBuffer mode_list,
3709 SilcClientID *client_id;
3710 SilcClientEntry client;
3711 SilcIDCacheEntry cache;
3714 for (i = 0; i < user_count; i++) {
3716 SILC_GET16_MSB(idp_len, user_list->data + 2);
3718 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3719 silc_buffer_pull(user_list, idp_len);
3724 SILC_GET32_MSB(mode, mode_list->data);
3725 silc_buffer_pull(mode_list, 4);
3727 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3728 silc_free(client_id);
3734 /* Check if we have this client cached already. */
3735 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3736 server->server_type, &cache);
3738 client = silc_idlist_find_client_by_id(server->global_list,
3739 client_id, server->server_type,
3744 /* If router did not find such Client ID in its lists then this must
3745 be bogus client or some router in the net is buggy. */
3746 if (server->server_type == SILC_ROUTER) {
3747 silc_free(client_id);
3751 /* We don't have that client anywhere, add it. The client is added
3752 to global list since server didn't have it in the lists so it must be
3754 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3755 silc_id_dup(client_id, SILC_ID_CLIENT),
3756 sock->user_data, NULL, 0);
3758 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3759 silc_free(client_id);
3763 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3765 /* Found, if it is from global list we'll assure that we won't
3766 expire it now that the entry is on channel. */
3771 silc_free(client_id);
3773 if (!silc_server_client_on_channel(client, channel)) {
3774 /* Client was not on the channel, add it. */
3775 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3776 chl->client = client;
3778 chl->channel = channel;
3779 silc_hash_table_add(channel->user_list, chl->client, chl);
3780 silc_hash_table_add(client->channels, chl->channel, chl);
3785 /* Lookups route to the client indicated by the `id_data'. The connection
3786 object and internal data object is returned. Returns NULL if route
3787 could not be found to the client. If the `client_id' is specified then
3788 it is used and the `id_data' is ignored. */
3790 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3791 unsigned char *id_data,
3793 SilcClientID *client_id,
3794 SilcIDListData *idata)
3797 SilcClientEntry client;
3799 SILC_LOG_DEBUG(("Start"));
3801 /* Decode destination Client ID */
3803 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3805 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3809 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3812 /* If the destination belongs to our server we don't have to route
3813 the packet anywhere but to send it to the local destination. */
3814 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3818 /* If we are router and the client has router then the client is in
3819 our cell but not directly connected to us. */
3820 if (server->server_type == SILC_ROUTER && client->router) {
3821 /* We are of course in this case the client's router thus the route
3822 to the client is the server who owns the client. So, we will send
3823 the packet to that server. */
3825 *idata = (SilcIDListData)client->router;
3826 return client->router->connection;
3829 /* Seems that client really is directly connected to us */
3831 *idata = (SilcIDListData)client;
3832 return client->connection;
3835 /* Destination belongs to someone not in this server. If we are normal
3836 server our action is to send the packet to our router. */
3837 if (server->server_type != SILC_ROUTER && !server->standalone) {
3840 *idata = (SilcIDListData)server->router;
3841 return server->router->connection;
3844 /* We are router and we will perform route lookup for the destination
3845 and send the packet to fastest route. */
3846 if (server->server_type == SILC_ROUTER && !server->standalone) {
3847 /* Check first that the ID is valid */
3848 client = silc_idlist_find_client_by_id(server->global_list, id,
3851 SilcSocketConnection dst_sock;
3853 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3857 *idata = (SilcIDListData)dst_sock->user_data;
3866 /* Encodes and returns channel list of channels the `client' has joined.
3867 Secret channels are not put to the list. */
3869 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3870 SilcClientEntry client)
3872 SilcBuffer buffer = NULL;
3873 SilcChannelEntry channel;
3874 SilcChannelClientEntry chl;
3875 SilcHashTableList htl;
3881 silc_hash_table_list(client->channels, &htl);
3882 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3883 channel = chl->channel;
3885 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3886 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3889 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3890 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3891 name_len = strlen(channel->channel_name);
3893 len = 4 + name_len + id_len + 4;
3894 buffer = silc_buffer_realloc(buffer,
3895 (buffer ? (buffer)->truelen + len : len));
3896 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3897 silc_buffer_format(buffer,
3898 SILC_STR_UI_SHORT(name_len),
3899 SILC_STR_UI_XNSTRING(channel->channel_name,
3901 SILC_STR_UI_SHORT(id_len),
3902 SILC_STR_UI_XNSTRING(cid, id_len),
3903 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3905 silc_buffer_pull(buffer, len);
3910 silc_buffer_push(buffer, buffer->data - buffer->head);
3915 /* Finds client entry by Client ID and if it is not found then resolves
3916 it using WHOIS command. */
3918 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3919 SilcClientID *client_id)
3921 SilcClientEntry client;
3923 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3926 client = silc_idlist_find_client_by_id(server->global_list,
3927 client_id, TRUE, NULL);
3928 if (!client && server->server_type == SILC_ROUTER)
3932 if (!client && server->standalone)
3935 if (!client || !client->nickname || !client->username) {
3936 SilcBuffer buffer, idp;
3938 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3939 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3940 client->resolve_cmd_ident = ++server->cmd_ident;
3942 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3943 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3944 server->cmd_ident, 1,
3945 3, idp->data, idp->len);
3946 silc_server_packet_send(server, client ? client->router->connection :
3947 server->router->connection,
3948 SILC_PACKET_COMMAND, 0,
3949 buffer->data, buffer->len, FALSE);
3950 silc_buffer_free(idp);
3951 silc_buffer_free(buffer);
3958 /* A timeout callback for the re-key. We will be the initiator of the
3961 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3963 SilcSocketConnection sock = (SilcSocketConnection)context;
3964 SilcIDListData idata = (SilcIDListData)sock->user_data;
3965 SilcServer server = (SilcServer)idata->rekey->context;
3966 SilcProtocol protocol;
3967 SilcServerRekeyInternalContext *proto_ctx;
3969 SILC_LOG_DEBUG(("Start"));
3971 /* Allocate internal protocol context. This is sent as context
3973 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3974 proto_ctx->server = (void *)server;
3975 proto_ctx->sock = sock;
3976 proto_ctx->responder = FALSE;
3977 proto_ctx->pfs = idata->rekey->pfs;
3979 /* Perform rekey protocol. Will call the final callback after the
3980 protocol is over. */
3981 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3982 &protocol, proto_ctx, silc_server_rekey_final);
3983 sock->protocol = protocol;
3985 /* Run the protocol */
3986 silc_protocol_execute(protocol, server->schedule, 0, 0);
3988 /* Re-register re-key timeout */
3989 silc_schedule_task_add(server->schedule, sock->sock,
3990 silc_server_rekey_callback,
3991 context, idata->rekey->timeout, 0,
3992 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3995 /* The final callback for the REKEY protocol. This will actually take the
3996 new key material into use. */
3998 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4000 SilcProtocol protocol = (SilcProtocol)context;
4001 SilcServerRekeyInternalContext *ctx =
4002 (SilcServerRekeyInternalContext *)protocol->context;
4003 SilcServer server = (SilcServer)ctx->server;
4004 SilcSocketConnection sock = ctx->sock;
4006 SILC_LOG_DEBUG(("Start"));
4008 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4009 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4010 /* Error occured during protocol */
4011 SILC_LOG_ERROR(("Error occurred during rekey protocol"));
4012 silc_protocol_cancel(protocol, server->schedule);
4013 silc_protocol_free(protocol);
4014 sock->protocol = NULL;
4016 silc_packet_context_free(ctx->packet);
4018 silc_ske_free(ctx->ske);
4023 /* Purge the outgoing data queue to assure that all rekey packets really
4024 go to the network before we quit the protocol. */
4025 silc_server_packet_queue_purge(server, sock);
4028 silc_protocol_free(protocol);
4029 sock->protocol = NULL;
4031 silc_packet_context_free(ctx->packet);
4033 silc_ske_free(ctx->ske);