5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 if (!server->config->server_keys ||
125 !server->config->server_keys->public_key ||
126 !server->config->server_keys->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
130 server->public_key = server->config->server_keys->public_key;
131 server->private_key = server->config->server_keys->private_key;
133 /* XXX After server is made as Silc Server Library this can be given
134 as argument, for now this is hard coded */
135 server->params = silc_calloc(1, sizeof(*server->params));
136 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
137 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
138 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
139 server->params->retry_keep_trying = FALSE;
140 server->params->protocol_timeout = 60;
141 server->params->require_reverse_mapping = FALSE;
143 /* Set log files where log message should be saved. */
144 server->config->server = server;
145 silc_server_config_setlogfiles(server->config);
147 /* Register all configured ciphers, PKCS and hash functions. */
148 if (!silc_server_config_register_ciphers(server->config))
149 silc_cipher_register_default();
150 if (!silc_server_config_register_pkcs(server->config))
151 silc_pkcs_register_default();
152 if (!silc_server_config_register_hashfuncs(server->config))
153 silc_hash_register_default();
154 if (!silc_server_config_register_hmacs(server->config))
155 silc_hmac_register_default();
157 /* Initialize random number generator for the server. */
158 server->rng = silc_rng_alloc();
159 silc_rng_init(server->rng);
160 silc_rng_global_init(server->rng);
162 /* Initialize hash functions for server to use */
163 silc_hash_alloc("md5", &server->md5hash);
164 silc_hash_alloc("sha1", &server->sha1hash);
166 /* Initialize none cipher */
167 silc_cipher_alloc("none", &server->none_cipher);
169 /* Create a listening server. Note that our server can listen on
170 multiple ports. All listeners are created here and now. */
171 /* XXX Still check this whether to use server_info or listen_port. */
173 while(server->config->listen_port) {
176 tmp = silc_net_create_server(server->config->listen_port->port,
177 server->config->listen_port->host);
181 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
182 sock[sock_count] = tmp;
183 server->config->listen_port = server->config->listen_port->next;
187 /* Initialize ID caches */
188 server->local_list->clients =
189 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
190 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
191 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
193 /* These are allocated for normal server as well as these hold some
194 global information that the server has fetched from its router. For
195 router these are used as they are supposed to be used on router. */
196 server->global_list->clients =
197 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
198 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
199 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
201 /* Allocate the entire socket list that is used in server. Eventually
202 all connections will have entry in this table (it is a table of
203 pointers to the actual object that is allocated individually
205 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
206 sizeof(*server->sockets));
208 for (i = 0; i < sock_count; i++) {
209 SilcSocketConnection newsocket = NULL;
211 /* Set socket to non-blocking mode */
212 silc_net_set_socket_nonblock(sock[i]);
213 server->sock = sock[i];
215 /* Create a Server ID for the server. */
216 silc_id_create_server_id(sock[i], server->rng, &id);
222 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
223 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
224 server->id_type = SILC_ID_SERVER;
225 server->server_name = server->config->server_info->server_name;
227 /* Add ourselves to the server list. We don't have a router yet
228 beacuse we haven't established a route yet. It will be done later.
229 For now, NULL is sent as router. This allocates new entry to
232 silc_idlist_add_server(server->local_list,
233 server->config->server_info->server_name,
234 server->server_type, server->id, NULL, NULL);
236 SILC_LOG_ERROR(("Could not add ourselves to cache"));
240 /* Add ourselves also to the socket table. The entry allocated above
241 is sent as argument for fast referencing in the future. */
242 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
245 server->sockets[sock[i]] = newsocket;
247 /* Perform name and address lookups to resolve the listenning address
249 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
251 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
253 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
254 newsocket->hostname ? newsocket->hostname :
255 newsocket->ip ? newsocket->ip : ""));
256 server->stat.conn_failures++;
259 if (!newsocket->hostname)
260 newsocket->hostname = strdup(newsocket->ip);
262 newsocket->port = silc_net_get_local_port(sock[i]);
264 /* Put the allocated socket pointer also to the entry allocated above
265 for fast back-referencing to the socket list. */
266 id_entry->connection = (void *)server->sockets[sock[i]];
267 server->id_entry = id_entry;
270 /* Register the task queues. In SILC we have by default three task queues.
271 One task queue for non-timeout tasks which perform different kind of
272 I/O on file descriptors, timeout task queue for timeout tasks, and,
273 generic non-timeout task queue whose tasks apply to all connections. */
274 silc_task_queue_alloc(&server->io_queue, TRUE);
275 if (!server->io_queue) {
278 silc_task_queue_alloc(&server->timeout_queue, TRUE);
279 if (!server->timeout_queue) {
282 silc_task_queue_alloc(&server->generic_queue, TRUE);
283 if (!server->generic_queue) {
287 /* Register protocols */
288 silc_server_protocols_register();
290 /* Initialize the scheduler */
291 silc_schedule_init(&server->io_queue, &server->timeout_queue,
292 &server->generic_queue,
293 SILC_SERVER_MAX_CONNECTIONS);
295 /* Add the first task to the queue. This is task that is executed by
296 timeout. It expires as soon as the caller calls silc_server_run. This
297 task performs authentication protocol and key exchange with our
299 silc_task_register(server->timeout_queue, sock[0],
300 silc_server_connect_to_router,
301 (void *)server, 0, 1,
303 SILC_TASK_PRI_NORMAL);
305 /* Add listener task to the queue. This task receives new connections to the
306 server. This task remains on the queue until the end of the program. */
307 silc_task_register(server->io_queue, sock[0],
308 silc_server_accept_new_connection,
309 (void *)server, 0, 0,
311 SILC_TASK_PRI_NORMAL);
312 server->listenning = TRUE;
314 /* If server connections has been configured then we must be router as
315 normal server cannot have server connections, only router connections. */
316 if (server->config->servers)
317 server->server_type = SILC_ROUTER;
319 /* Register the ID Cache purge task. This periodically purges the ID cache
320 and removes the expired cache entries. */
322 /* Clients local list */
323 purge = silc_calloc(1, sizeof(*purge));
324 purge->cache = server->local_list->clients;
325 purge->timeout_queue = server->timeout_queue;
326 silc_task_register(purge->timeout_queue, 0,
328 (void *)purge, 600, 0,
329 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
331 /* Clients global list */
332 purge = silc_calloc(1, sizeof(*purge));
333 purge->cache = server->global_list->clients;
334 purge->timeout_queue = server->timeout_queue;
335 silc_task_register(purge->timeout_queue, 0,
337 (void *)purge, 300, 0,
338 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
340 SILC_LOG_DEBUG(("Server initialized"));
342 /* We are done here, return succesfully */
345 silc_task_queue_free(server->timeout_queue);
347 silc_task_queue_free(server->io_queue);
349 for (i = 0; i < sock_count; i++)
350 silc_net_close_server(sock[i]);
355 /* Fork server to background and set gid+uid to non-root.
356 Silcd will not run as root, so trying to set either user or group to
357 root will cause silcd to exit. */
359 void silc_server_daemonise(SilcServer server)
361 /* Are we executing silcd as root or a regular user? */
368 if (!server->config->identity || !server->config->identity->user ||
369 !server->config->identity->group) {
370 fprintf(stderr, "Error:"
371 "\tSILC server must not be run as root. For the security of your\n"
372 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
373 "\tuser account. Modify the [Identity] configuration section to run\n"
374 "\tthe server as non-root user.\n");
378 /* Get the values given for user and group in configuration file */
379 user=server->config->identity->user;
380 group=server->config->identity->group;
382 /* Check whether the user/group information is text */
383 if (atoi(user)!=0 || atoi(group)!=0) {
384 SILC_LOG_DEBUG(("Invalid user and/or group information"));
385 SILC_LOG_DEBUG(("User and/or group given as number"));
386 fprintf(stderr, "Invalid user and/or group information\n");
387 fprintf(stderr, "Please assign them as names, not numbers\n");
391 /* Catch the nasty incident of string "0" returning 0 from atoi */
392 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
393 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
394 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
402 fprintf(stderr, "No such user %s found\n", user);
407 fprintf(stderr, "No such group %s found\n", group);
411 /* Check whether user and/or group is set to root. If yes, exit
412 immediately. Otherwise, setgid and setuid server to user.group */
413 if (gr->gr_gid==0 || pw->pw_uid==0) {
414 fprintf(stderr, "Error:"
415 "\tSILC server must not be run as root. For the security of your\n"
416 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
417 "\tuser account. Modify the [Identity] configuration section to run\n"
418 "\tthe server as non-root user.\n");
421 /* Fork server to background, making it a daemon */
423 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
424 SILC_LOG_DEBUG(("Forking SILC server to background"));
429 SILC_LOG_DEBUG(("Changing to group %s", group));
430 if(setgid(gr->gr_gid)==0) {
431 SILC_LOG_DEBUG(("Setgid to %s", group));
433 SILC_LOG_DEBUG(("Setgid to %s failed", group));
434 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
438 SILC_LOG_DEBUG(("Changing to user nobody"));
439 if(setuid(pw->pw_uid)==0) {
440 SILC_LOG_DEBUG(("Setuid to %s", user));
442 SILC_LOG_DEBUG(("Setuid to %s failed", user));
443 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
449 /* Fork server to background, making it a daemon */
451 SILC_LOG_DEBUG(("Server started as user"));
452 SILC_LOG_DEBUG(("Forking SILC server to background"));
459 /* Stops the SILC server. This function is used to shutdown the server.
460 This is usually called after the scheduler has returned. After stopping
461 the server one should call silc_server_free. */
463 void silc_server_stop(SilcServer server)
465 SILC_LOG_DEBUG(("Stopping server"));
467 /* Stop the scheduler, although it might be already stopped. This
468 doesn't hurt anyone. This removes all the tasks and task queues,
470 silc_schedule_stop();
471 silc_schedule_uninit();
473 silc_server_protocols_unregister();
475 SILC_LOG_DEBUG(("Server stopped"));
478 /* The heart of the server. This runs the scheduler thus runs the server.
479 When this returns the server has been stopped and the program will
482 void silc_server_run(SilcServer server)
484 SILC_LOG_DEBUG(("Running server"));
486 SILC_LOG_INFO(("SILC Server started"));
488 /* Start the scheduler, the heart of the SILC server. When this returns
489 the program will be terminated. */
493 /* Timeout callback that will be called to retry connecting to remote
494 router. This is used by both normal and router server. This will wait
495 before retrying the connecting. The timeout is generated by exponential
496 backoff algorithm. */
498 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
500 SilcServerConnection sconn = (SilcServerConnection)context;
501 SilcServer server = sconn->server;
503 SILC_LOG_INFO(("Retrying connecting to a router"));
505 /* Calculate next timeout */
506 if (sconn->retry_count >= 1) {
507 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
508 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
509 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
511 sconn->retry_timeout = server->params->retry_interval_min;
513 sconn->retry_count++;
514 sconn->retry_timeout = sconn->retry_timeout +
515 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
517 /* If we've reached max retry count, give up. */
518 if (sconn->retry_count > server->params->retry_count &&
519 server->params->retry_keep_trying == FALSE) {
520 SILC_LOG_ERROR(("Could not connect to router, giving up"));
524 /* Wait one before retrying */
525 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
526 context, sconn->retry_timeout,
527 server->params->retry_interval_min_usec,
528 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
531 /* Generic routine to use connect to a router. */
533 SILC_TASK_CALLBACK(silc_server_connect_router)
535 SilcServerConnection sconn = (SilcServerConnection)context;
536 SilcServer server = sconn->server;
537 SilcSocketConnection newsocket;
538 SilcProtocol protocol;
539 SilcServerKEInternalContext *proto_ctx;
542 SILC_LOG_INFO(("Connecting to the router %s on port %d",
543 sconn->remote_host, sconn->remote_port));
545 /* Connect to remote host */
546 sock = silc_net_create_connection(sconn->remote_port,
549 SILC_LOG_ERROR(("Could not connect to router"));
550 silc_task_register(server->timeout_queue, fd,
551 silc_server_connect_to_router_retry,
552 context, 0, 1, SILC_TASK_TIMEOUT,
553 SILC_TASK_PRI_NORMAL);
557 /* Set socket options */
558 silc_net_set_socket_nonblock(sock);
559 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
561 /* Create socket connection for the connection. Even though we
562 know that we are connecting to a router we will mark the socket
563 to be unknown connection until we have executed authentication
565 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
566 server->sockets[sock] = newsocket;
567 newsocket->hostname = strdup(sconn->remote_host);
568 newsocket->ip = strdup(sconn->remote_host);
569 newsocket->port = sconn->remote_port;
570 sconn->sock = newsocket;
572 /* Allocate internal protocol context. This is sent as context
574 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
575 proto_ctx->server = (void *)server;
576 proto_ctx->context = (void *)sconn;
577 proto_ctx->sock = newsocket;
578 proto_ctx->rng = server->rng;
579 proto_ctx->responder = FALSE;
581 /* Perform key exchange protocol. silc_server_connect_to_router_second
582 will be called after the protocol is finished. */
583 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
584 &protocol, proto_ctx,
585 silc_server_connect_to_router_second);
586 newsocket->protocol = protocol;
588 /* Register a timeout task that will be executed if the protocol
589 is not executed within set limit. */
590 proto_ctx->timeout_task =
591 silc_task_register(server->timeout_queue, sock,
592 silc_server_timeout_remote,
593 server, server->params->protocol_timeout,
594 server->params->protocol_timeout_usec,
598 /* Register the connection for network input and output. This sets
599 that scheduler will listen for incoming packets for this connection
600 and sets that outgoing packets may be sent to this connection as
601 well. However, this doesn't set the scheduler for outgoing traffic,
602 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
603 later when outgoing data is available. */
604 context = (void *)server;
605 SILC_REGISTER_CONNECTION_FOR_IO(sock);
607 /* Run the protocol */
608 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
611 /* This function connects to our primary router or if we are a router this
612 establishes all our primary routes. This is called at the start of the
613 server to do authentication and key exchange with our router - called
616 SILC_TASK_CALLBACK(silc_server_connect_to_router)
618 SilcServer server = (SilcServer)context;
619 SilcServerConnection sconn;
621 SILC_LOG_DEBUG(("Connecting to router(s)"));
623 /* If we are normal SILC server we need to connect to our cell's
625 if (server->server_type == SILC_SERVER) {
626 SILC_LOG_DEBUG(("We are normal server"));
628 /* Create connection to the router, if configured. */
629 if (server->config->routers) {
631 /* Allocate connection object for hold connection specific stuff. */
632 sconn = silc_calloc(1, sizeof(*sconn));
633 sconn->server = server;
634 sconn->remote_host = strdup(server->config->routers->host);
635 sconn->remote_port = server->config->routers->port;
637 silc_task_register(server->timeout_queue, fd,
638 silc_server_connect_router,
639 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
640 SILC_TASK_PRI_NORMAL);
645 /* If we are a SILC router we need to establish all of our primary
647 if (server->server_type == SILC_ROUTER) {
648 SilcServerConfigSectionServerConnection *ptr;
650 SILC_LOG_DEBUG(("We are router"));
652 /* Create the connections to all our routes */
653 ptr = server->config->routers;
656 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
657 ptr->initiator ? "Initiator" : "Responder",
658 ptr->host, ptr->port));
660 if (ptr->initiator) {
661 /* Allocate connection object for hold connection specific stuff. */
662 sconn = silc_calloc(1, sizeof(*sconn));
663 sconn->server = server;
664 sconn->remote_host = strdup(ptr->host);
665 sconn->remote_port = ptr->port;
667 silc_task_register(server->timeout_queue, fd,
668 silc_server_connect_router,
669 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
670 SILC_TASK_PRI_NORMAL);
680 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
682 /* There wasn't a configured router, we will continue but we don't
683 have a connection to outside world. We will be standalone server. */
684 server->standalone = TRUE;
687 /* Second part of connecting to router(s). Key exchange protocol has been
688 executed and now we will execute authentication protocol. */
690 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
692 SilcProtocol protocol = (SilcProtocol)context;
693 SilcServerKEInternalContext *ctx =
694 (SilcServerKEInternalContext *)protocol->context;
695 SilcServer server = (SilcServer)ctx->server;
696 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
697 SilcSocketConnection sock = ctx->sock;
698 SilcServerConnAuthInternalContext *proto_ctx;
699 SilcServerConfigSectionServerConnection *conn = NULL;
701 SILC_LOG_DEBUG(("Start"));
703 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
704 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
705 /* Error occured during protocol */
706 silc_protocol_free(protocol);
707 sock->protocol = NULL;
708 silc_ske_free_key_material(ctx->keymat);
710 silc_packet_context_free(ctx->packet);
712 silc_ske_free(ctx->ske);
714 silc_free(ctx->dest_id);
716 silc_task_unregister_by_callback(server->timeout_queue,
717 silc_server_failure_callback);
718 silc_server_disconnect_remote(server, sock, "Server closed connection: "
719 "Key exchange failed");
723 /* We now have the key material as the result of the key exchange
724 protocol. Take the key material into use. Free the raw key material
725 as soon as we've set them into use. */
726 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
727 ctx->ske->prop->cipher,
728 ctx->ske->prop->pkcs,
729 ctx->ske->prop->hash,
730 ctx->ske->prop->hmac,
731 ctx->ske->prop->group,
733 silc_protocol_free(protocol);
734 sock->protocol = NULL;
735 silc_ske_free_key_material(ctx->keymat);
737 silc_packet_context_free(ctx->packet);
739 silc_ske_free(ctx->ske);
741 silc_free(ctx->dest_id);
743 silc_task_unregister_by_callback(server->timeout_queue,
744 silc_server_failure_callback);
745 silc_server_disconnect_remote(server, sock, "Server closed connection: "
746 "Key exchange failed");
749 silc_ske_free_key_material(ctx->keymat);
751 /* Allocate internal context for the authentication protocol. This
752 is sent as context for the protocol. */
753 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
754 proto_ctx->server = (void *)server;
755 proto_ctx->context = (void *)sconn;
756 proto_ctx->sock = sock;
757 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
758 proto_ctx->dest_id_type = ctx->dest_id_type;
759 proto_ctx->dest_id = ctx->dest_id;
761 /* Resolve the authentication method used in this connection. Check if
762 we find a match from user configured connections */
763 conn = silc_server_config_find_router_conn(server->config,
767 /* Match found. Use the configured authentication method */
768 proto_ctx->auth_meth = conn->auth_meth;
769 if (conn->auth_data) {
770 proto_ctx->auth_data = strdup(conn->auth_data);
771 proto_ctx->auth_data_len = strlen(conn->auth_data);
774 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
775 sock->hostname, sock->ip, sock->port));
776 silc_protocol_free(protocol);
777 sock->protocol = NULL;
779 silc_packet_context_free(ctx->packet);
781 silc_ske_free(ctx->ske);
783 silc_free(ctx->dest_id);
785 silc_task_unregister_by_callback(server->timeout_queue,
786 silc_server_failure_callback);
787 silc_server_disconnect_remote(server, sock, "Server closed connection: "
788 "Key exchange failed");
792 /* Free old protocol as it is finished now */
793 silc_protocol_free(protocol);
795 silc_packet_context_free(ctx->packet);
797 sock->protocol = NULL;
799 /* Allocate the authentication protocol. This is allocated here
800 but we won't start it yet. We will be receiving party of this
801 protocol thus we will wait that connecting party will make
803 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
804 &sock->protocol, proto_ctx,
805 silc_server_connect_to_router_final);
807 /* Register timeout task. If the protocol is not executed inside
808 this timelimit the connection will be terminated. Currently
809 this is 15 seconds and is hard coded limit (XXX). */
810 proto_ctx->timeout_task =
811 silc_task_register(server->timeout_queue, sock->sock,
812 silc_server_timeout_remote,
813 (void *)server, 15, 0,
817 /* Run the protocol */
818 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
821 /* Finalizes the connection to router. Registers a server task to the
822 queue so that we can accept new connections. */
824 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
826 SilcProtocol protocol = (SilcProtocol)context;
827 SilcServerConnAuthInternalContext *ctx =
828 (SilcServerConnAuthInternalContext *)protocol->context;
829 SilcServer server = (SilcServer)ctx->server;
830 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
831 SilcSocketConnection sock = ctx->sock;
832 SilcServerEntry id_entry;
834 SilcServerHBContext hb_context;
835 unsigned char *id_string;
837 SilcIDListData idata;
839 SILC_LOG_DEBUG(("Start"));
841 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
842 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
843 /* Error occured during protocol */
845 silc_free(ctx->dest_id);
846 silc_server_disconnect_remote(server, sock, "Server closed connection: "
847 "Authentication failed");
851 /* Add a task to the queue. This task receives new connections to the
852 server. This task remains on the queue until the end of the program. */
853 if (!server->listenning) {
854 silc_task_register(server->io_queue, server->sock,
855 silc_server_accept_new_connection,
856 (void *)server, 0, 0,
858 SILC_TASK_PRI_NORMAL);
859 server->listenning = TRUE;
862 /* Send NEW_SERVER packet to the router. We will become registered
863 to the SILC network after sending this packet. */
864 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
865 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
866 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
867 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
868 silc_buffer_format(packet,
869 SILC_STR_UI_SHORT(id_len),
870 SILC_STR_UI_XNSTRING(id_string, id_len),
871 SILC_STR_UI_SHORT(strlen(server->server_name)),
872 SILC_STR_UI_XNSTRING(server->server_name,
873 strlen(server->server_name)),
876 /* Send the packet */
877 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
878 packet->data, packet->len, TRUE);
879 silc_buffer_free(packet);
880 silc_free(id_string);
882 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
884 /* Add the connected router to local server list */
885 server->standalone = FALSE;
886 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
887 SILC_ROUTER, ctx->dest_id, NULL, sock);
890 silc_free(ctx->dest_id);
891 silc_server_disconnect_remote(server, sock, "Server closed connection: "
892 "Authentication failed");
896 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
897 silc_free(sock->user_data);
898 sock->user_data = (void *)id_entry;
899 sock->type = SILC_SOCKET_TYPE_ROUTER;
900 server->id_entry->router = id_entry;
901 server->router = id_entry;
902 idata = (SilcIDListData)sock->user_data;
903 idata->registered = TRUE;
905 /* Perform keepalive. The `hb_context' will be freed automatically
906 when finally calling the silc_socket_free function. XXX hardcoded
908 hb_context = silc_calloc(1, sizeof(*hb_context));
909 hb_context->server = server;
910 silc_socket_set_heartbeat(sock, 600, hb_context,
911 silc_server_perform_heartbeat,
912 server->timeout_queue);
914 /* Register re-key timeout */
915 idata->rekey->timeout = 3600; /* XXX hardcoded */
916 idata->rekey->context = (void *)server;
917 silc_task_register(server->timeout_queue, sock->sock,
918 silc_server_rekey_callback,
919 (void *)sock, idata->rekey->timeout, 0,
920 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
922 /* If we are router then announce our possible servers. */
923 if (server->server_type == SILC_ROUTER)
924 silc_server_announce_servers(server);
926 /* Announce our clients and channels to the router */
927 silc_server_announce_clients(server);
928 silc_server_announce_channels(server);
931 /* Free the temporary connection data context */
933 silc_free(sconn->remote_host);
937 /* Free the protocol object */
938 silc_protocol_free(protocol);
940 silc_packet_context_free(ctx->packet);
942 silc_ske_free(ctx->ske);
944 sock->protocol = NULL;
947 /* Accepts new connections to the server. Accepting new connections are
948 done in three parts to make it async. */
950 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
952 SilcServer server = (SilcServer)context;
953 SilcSocketConnection newsocket;
954 SilcServerKEInternalContext *proto_ctx;
956 void *cconfig, *sconfig, *rconfig;
957 SilcServerConfigSectionDenyConnection *deny;
959 SILC_LOG_DEBUG(("Accepting new connection"));
961 server->stat.conn_attempts++;
963 sock = silc_net_accept_connection(server->sock);
965 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
966 server->stat.conn_failures++;
970 /* Check max connections */
971 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
972 SILC_LOG_ERROR(("Refusing connection, server is full"));
973 server->stat.conn_failures++;
977 /* Set socket options */
978 silc_net_set_socket_nonblock(sock);
979 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
981 /* We don't create a ID yet, since we don't know what type of connection
982 this is yet. But, we do add the connection to the socket table. */
983 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
984 server->sockets[sock] = newsocket;
986 /* XXX This MUST be done async as this will block the entire server
987 process. Either we have to do our own resolver stuff or in the future
988 we can use threads. */
989 /* Perform name and address lookups for the remote host. */
990 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
992 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
994 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
995 newsocket->hostname ? newsocket->hostname :
996 newsocket->ip ? newsocket->ip : ""));
997 server->stat.conn_failures++;
1000 if (!newsocket->hostname)
1001 newsocket->hostname = strdup(newsocket->ip);
1003 newsocket->port = silc_net_get_remote_port(sock);
1005 /* Register the connection for network input and output. This sets
1006 that scheduler will listen for incoming packets for this connection
1007 and sets that outgoing packets may be sent to this connection as well.
1008 However, this doesn't set the scheduler for outgoing traffic, it
1009 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1010 later when outgoing data is available. */
1011 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1013 port = server->sockets[fd]->port; /* Listenning port */
1015 /* Check whether this connection is denied to connect to us. */
1016 deny = silc_server_config_denied_conn(server->config, newsocket->ip, port);
1018 deny = silc_server_config_denied_conn(server->config, newsocket->hostname,
1021 /* The connection is denied */
1022 silc_server_disconnect_remote(server, newsocket, deny->comment ?
1024 "Server closed connection: "
1025 "Connection refused");
1026 server->stat.conn_failures++;
1030 /* Check whether we have configred this sort of connection at all. We
1031 have to check all configurations since we don't know what type of
1032 connection this is. */
1033 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1034 newsocket->ip, port)))
1035 cconfig = silc_server_config_find_client_conn(server->config,
1036 newsocket->hostname,
1038 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1041 sconfig = silc_server_config_find_server_conn(server->config,
1042 newsocket->hostname,
1044 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1045 newsocket->ip, port)))
1046 rconfig = silc_server_config_find_router_conn(server->config,
1047 newsocket->hostname,
1049 if (!cconfig && !sconfig && !rconfig) {
1050 silc_server_disconnect_remote(server, newsocket,
1051 "Server closed connection: "
1052 "Connection refused");
1053 server->stat.conn_failures++;
1057 /* The connection is allowed */
1059 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1062 /* Allocate internal context for key exchange protocol. This is
1063 sent as context for the protocol. */
1064 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1065 proto_ctx->server = context;
1066 proto_ctx->sock = newsocket;
1067 proto_ctx->rng = server->rng;
1068 proto_ctx->responder = TRUE;
1069 proto_ctx->cconfig = cconfig;
1070 proto_ctx->sconfig = sconfig;
1071 proto_ctx->rconfig = rconfig;
1073 /* Prepare the connection for key exchange protocol. We allocate the
1074 protocol but will not start it yet. The connector will be the
1075 initiator of the protocol thus we will wait for initiation from
1076 there before we start the protocol. */
1077 server->stat.auth_attempts++;
1078 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1079 &newsocket->protocol, proto_ctx,
1080 silc_server_accept_new_connection_second);
1082 /* Register a timeout task that will be executed if the connector
1083 will not start the key exchange protocol within 60 seconds. For
1084 now, this is a hard coded limit. After 60 secs the connection will
1085 be closed if the key exchange protocol has not been started. */
1086 proto_ctx->timeout_task =
1087 silc_task_register(server->timeout_queue, newsocket->sock,
1088 silc_server_timeout_remote,
1094 /* Second part of accepting new connection. Key exchange protocol has been
1095 performed and now it is time to do little connection authentication
1096 protocol to figure out whether this connection is client or server
1097 and whether it has right to access this server (especially server
1098 connections needs to be authenticated). */
1100 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1102 SilcProtocol protocol = (SilcProtocol)context;
1103 SilcServerKEInternalContext *ctx =
1104 (SilcServerKEInternalContext *)protocol->context;
1105 SilcServer server = (SilcServer)ctx->server;
1106 SilcSocketConnection sock = ctx->sock;
1107 SilcServerConnAuthInternalContext *proto_ctx;
1109 SILC_LOG_DEBUG(("Start"));
1111 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1112 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1113 /* Error occured during protocol */
1114 silc_protocol_free(protocol);
1115 sock->protocol = NULL;
1116 silc_ske_free_key_material(ctx->keymat);
1118 silc_packet_context_free(ctx->packet);
1120 silc_ske_free(ctx->ske);
1122 silc_free(ctx->dest_id);
1124 silc_task_unregister_by_callback(server->timeout_queue,
1125 silc_server_failure_callback);
1126 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1127 "Key exchange failed");
1128 server->stat.auth_failures++;
1132 /* We now have the key material as the result of the key exchange
1133 protocol. Take the key material into use. Free the raw key material
1134 as soon as we've set them into use. */
1135 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1136 ctx->ske->prop->cipher,
1137 ctx->ske->prop->pkcs,
1138 ctx->ske->prop->hash,
1139 ctx->ske->prop->hmac,
1140 ctx->ske->prop->group,
1142 silc_protocol_free(protocol);
1143 sock->protocol = NULL;
1144 silc_ske_free_key_material(ctx->keymat);
1146 silc_packet_context_free(ctx->packet);
1148 silc_ske_free(ctx->ske);
1150 silc_free(ctx->dest_id);
1152 silc_task_unregister_by_callback(server->timeout_queue,
1153 silc_server_failure_callback);
1154 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1155 "Key exchange failed");
1156 server->stat.auth_failures++;
1159 silc_ske_free_key_material(ctx->keymat);
1161 /* Allocate internal context for the authentication protocol. This
1162 is sent as context for the protocol. */
1163 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1164 proto_ctx->server = (void *)server;
1165 proto_ctx->sock = sock;
1166 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1167 proto_ctx->responder = TRUE;
1168 proto_ctx->dest_id_type = ctx->dest_id_type;
1169 proto_ctx->dest_id = ctx->dest_id;
1170 proto_ctx->cconfig = ctx->cconfig;
1171 proto_ctx->sconfig = ctx->sconfig;
1172 proto_ctx->rconfig = ctx->rconfig;
1174 /* Free old protocol as it is finished now */
1175 silc_protocol_free(protocol);
1177 silc_packet_context_free(ctx->packet);
1179 sock->protocol = NULL;
1181 /* Allocate the authentication protocol. This is allocated here
1182 but we won't start it yet. We will be receiving party of this
1183 protocol thus we will wait that connecting party will make
1184 their first move. */
1185 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1186 &sock->protocol, proto_ctx,
1187 silc_server_accept_new_connection_final);
1189 /* Register timeout task. If the protocol is not executed inside
1190 this timelimit the connection will be terminated. Currently
1191 this is 60 seconds and is hard coded limit (XXX). */
1192 proto_ctx->timeout_task =
1193 silc_task_register(server->timeout_queue, sock->sock,
1194 silc_server_timeout_remote,
1195 (void *)server, 60, 0,
1200 /* Final part of accepting new connection. The connection has now
1201 been authenticated and keys has been exchanged. We also know whether
1202 this is client or server connection. */
1204 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1206 SilcProtocol protocol = (SilcProtocol)context;
1207 SilcServerConnAuthInternalContext *ctx =
1208 (SilcServerConnAuthInternalContext *)protocol->context;
1209 SilcServer server = (SilcServer)ctx->server;
1210 SilcSocketConnection sock = ctx->sock;
1211 SilcServerHBContext hb_context;
1212 void *id_entry = NULL;
1214 SILC_LOG_DEBUG(("Start"));
1216 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1217 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1218 /* Error occured during protocol */
1219 silc_protocol_free(protocol);
1220 sock->protocol = NULL;
1222 silc_packet_context_free(ctx->packet);
1224 silc_ske_free(ctx->ske);
1226 silc_free(ctx->dest_id);
1229 sock->protocol = NULL;
1230 silc_task_unregister_by_callback(server->timeout_queue,
1231 silc_server_failure_callback);
1232 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1233 "Authentication failed");
1234 server->stat.auth_failures++;
1238 sock->type = ctx->conn_type;
1239 switch(sock->type) {
1240 case SILC_SOCKET_TYPE_CLIENT:
1242 SilcClientEntry client;
1244 SILC_LOG_DEBUG(("Remote host is client"));
1245 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1248 /* Add the client to the client ID cache. The nickname and Client ID
1249 and other information is created after we have received NEW_CLIENT
1250 packet from client. */
1251 client = silc_idlist_add_client(server->local_list,
1252 NULL, NULL, NULL, NULL, NULL, sock);
1254 SILC_LOG_ERROR(("Could not add new client to cache"));
1255 silc_free(sock->user_data);
1260 server->stat.my_clients++;
1261 server->stat.clients++;
1262 if (server->server_type == SILC_ROUTER)
1263 server->stat.cell_clients++;
1265 id_entry = (void *)client;
1268 case SILC_SOCKET_TYPE_SERVER:
1269 case SILC_SOCKET_TYPE_ROUTER:
1271 SilcServerEntry new_server;
1272 SilcServerConfigSectionServerConnection *conn =
1273 sock->type == SILC_SOCKET_TYPE_SERVER ? ctx->sconfig : ctx->rconfig;
1275 SILC_LOG_DEBUG(("Remote host is %s",
1276 sock->type == SILC_SOCKET_TYPE_SERVER ?
1277 "server" : "router"));
1278 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1279 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1280 "server" : "router"));
1282 /* Add the server into server cache. The server name and Server ID
1283 is updated after we have received NEW_SERVER packet from the
1284 server. We mark ourselves as router for this server if we really
1287 silc_idlist_add_server(server->local_list, NULL,
1288 sock->type == SILC_SOCKET_TYPE_SERVER ?
1289 SILC_SERVER : SILC_ROUTER, NULL,
1290 sock->type == SILC_SOCKET_TYPE_SERVER ?
1291 server->id_entry : NULL, sock);
1293 SILC_LOG_ERROR(("Could not add new server to cache"));
1294 silc_free(sock->user_data);
1299 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1300 server->stat.my_servers++;
1302 server->stat.my_routers++;
1303 server->stat.servers++;
1305 id_entry = (void *)new_server;
1307 /* Check whether this connection is to be our primary router connection
1308 if we dont' already have the primary route. */
1309 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1310 if (silc_server_config_is_primary_route(server->config) &&
1314 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1315 server->standalone = FALSE;
1316 if (!server->id_entry->router) {
1317 server->id_entry->router = id_entry;
1318 server->router = id_entry;
1328 /* Add the common data structure to the ID entry. */
1330 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1332 /* Add to sockets internal pointer for fast referencing */
1333 silc_free(sock->user_data);
1334 sock->user_data = id_entry;
1336 /* Connection has been fully established now. Everything is ok. */
1337 SILC_LOG_DEBUG(("New connection authenticated"));
1339 /* Perform keepalive. The `hb_context' will be freed automatically
1340 when finally calling the silc_socket_free function. XXX hardcoded
1342 hb_context = silc_calloc(1, sizeof(*hb_context));
1343 hb_context->server = server;
1344 silc_socket_set_heartbeat(sock, 600, hb_context,
1345 silc_server_perform_heartbeat,
1346 server->timeout_queue);
1348 silc_task_unregister_by_callback(server->timeout_queue,
1349 silc_server_failure_callback);
1350 silc_protocol_free(protocol);
1352 silc_packet_context_free(ctx->packet);
1354 silc_ske_free(ctx->ske);
1356 silc_free(ctx->dest_id);
1358 sock->protocol = NULL;
1361 /* This function is used to read packets from network and send packets to
1362 network. This is usually a generic task. */
1364 SILC_TASK_CALLBACK(silc_server_packet_process)
1366 SilcServer server = (SilcServer)context;
1367 SilcSocketConnection sock = server->sockets[fd];
1368 SilcIDListData idata;
1369 SilcCipher cipher = NULL;
1370 SilcHmac hmac = NULL;
1376 SILC_LOG_DEBUG(("Processing packet"));
1378 /* Packet sending */
1380 if (type == SILC_TASK_WRITE) {
1381 /* Do not send data to disconnected connection */
1382 if (SILC_IS_DISCONNECTED(sock))
1385 server->stat.packets_sent++;
1387 if (sock->outbuf->data - sock->outbuf->head)
1388 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1390 /* Send the packet */
1391 ret = silc_packet_send(sock, TRUE);
1393 /* If returned -2 could not write to connection now, will do
1401 /* The packet has been sent and now it is time to set the connection
1402 back to only for input. When there is again some outgoing data
1403 available for this connection it will be set for output as well.
1404 This call clears the output setting and sets it only for input. */
1405 SILC_SET_CONNECTION_FOR_INPUT(fd);
1406 SILC_UNSET_OUTBUF_PENDING(sock);
1408 silc_buffer_clear(sock->outbuf);
1412 /* Packet receiving */
1414 /* Read some data from connection */
1415 ret = silc_packet_receive(sock);
1421 SILC_LOG_DEBUG(("Read EOF"));
1423 /* If connection is disconnecting already we will finally
1424 close the connection */
1425 if (SILC_IS_DISCONNECTING(sock)) {
1426 if (sock->user_data)
1427 silc_server_free_sock_user_data(server, sock);
1428 silc_server_close_connection(server, sock);
1432 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1433 SILC_SET_DISCONNECTING(sock);
1435 /* If the closed connection was our primary router connection the
1436 start re-connecting phase. */
1437 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1438 sock == server->router->connection)
1439 silc_task_register(server->timeout_queue, 0,
1440 silc_server_connect_to_router,
1443 SILC_TASK_PRI_NORMAL);
1445 if (sock->user_data)
1446 silc_server_free_sock_user_data(server, sock);
1447 silc_server_close_connection(server, sock);
1451 /* If connection is disconnecting or disconnected we will ignore
1453 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1454 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1458 server->stat.packets_received++;
1460 /* Get keys and stuff from ID entry */
1461 idata = (SilcIDListData)sock->user_data;
1463 idata->last_receive = time(NULL);
1464 cipher = idata->receive_key;
1465 hmac = idata->hmac_receive;
1468 /* Process the packet. This will call the parser that will then
1469 decrypt and parse the packet. */
1470 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1474 /* Callback function that the silc_packet_decrypt will call to make the
1475 decision whether the packet is normal or special packet. We will
1476 return TRUE if it is normal and FALSE if it is special */
1478 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1480 SilcPacketContext *packet,
1483 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1484 SilcServer server = (SilcServer)parse_ctx->context;
1486 /* Packet is normal packet, if:
1488 1) packet is private message packet and does not have private key set
1489 2) is other packet than channel message packet
1490 3) is channel message packet and remote is router and we are router
1492 all other packets are special packets
1495 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1496 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1499 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1500 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1501 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1502 server->server_type == SILC_ROUTER))
1508 /* Parses whole packet, received earlier. */
1510 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1512 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1513 SilcServer server = (SilcServer)parse_ctx->context;
1514 SilcSocketConnection sock = parse_ctx->sock;
1515 SilcPacketContext *packet = parse_ctx->packet;
1516 SilcIDListData idata = (SilcIDListData)sock->user_data;
1519 SILC_LOG_DEBUG(("Start"));
1521 /* Decrypt the received packet */
1522 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1523 idata ? idata->hmac_receive : NULL,
1524 packet->buffer, packet,
1525 silc_server_packet_decrypt_check, parse_ctx);
1530 /* Parse the packet. Packet type is returned. */
1531 ret = silc_packet_parse(packet);
1533 /* Parse the packet header in special way as this is "special"
1535 ret = silc_packet_parse_special(packet);
1538 if (ret == SILC_PACKET_NONE)
1541 /* Check that the the current client ID is same as in the client's packet. */
1542 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1543 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1544 if (client && client->id) {
1545 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1546 packet->src_id_type);
1547 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1555 if (server->server_type == SILC_ROUTER) {
1556 /* Route the packet if it is not destined to us. Other ID types but
1557 server are handled separately after processing them. */
1558 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1559 packet->dst_id_type == SILC_ID_SERVER &&
1560 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1561 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1563 /* Route the packet to fastest route for the destination ID */
1564 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1565 packet->dst_id_type);
1568 silc_server_packet_route(server,
1569 silc_server_route_get(server, id,
1570 packet->dst_id_type),
1577 /* Parse the incoming packet type */
1578 silc_server_packet_parse_type(server, sock, packet);
1580 if (server->server_type == SILC_ROUTER) {
1581 /* Broadcast packet if it is marked as broadcast packet and it is
1582 originated from router and we are router. */
1583 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1584 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1585 !server->standalone) {
1586 silc_server_packet_broadcast(server, server->router->connection, packet);
1591 /* silc_buffer_clear(sock->inbuf); */
1592 silc_packet_context_free(packet);
1593 silc_free(parse_ctx);
1596 /* Parser callback called by silc_packet_receive_process. This merely
1597 registers timeout that will handle the actual parsing when appropriate. */
1599 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1601 SilcServer server = (SilcServer)parser_context->context;
1602 SilcSocketConnection sock = parser_context->sock;
1604 switch (sock->type) {
1605 case SILC_SOCKET_TYPE_UNKNOWN:
1606 case SILC_SOCKET_TYPE_CLIENT:
1607 /* Parse the packet with timeout */
1608 silc_task_register(server->timeout_queue, sock->sock,
1609 silc_server_packet_parse_real,
1610 (void *)parser_context, 0, 100000,
1612 SILC_TASK_PRI_NORMAL);
1614 case SILC_SOCKET_TYPE_SERVER:
1615 case SILC_SOCKET_TYPE_ROUTER:
1616 /* Packets from servers are parsed as soon as possible */
1617 silc_task_register(server->timeout_queue, sock->sock,
1618 silc_server_packet_parse_real,
1619 (void *)parser_context, 0, 1,
1621 SILC_TASK_PRI_NORMAL);
1628 /* Parses the packet type and calls what ever routines the packet type
1629 requires. This is done for all incoming packets. */
1631 void silc_server_packet_parse_type(SilcServer server,
1632 SilcSocketConnection sock,
1633 SilcPacketContext *packet)
1635 SilcPacketType type = packet->type;
1637 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1639 /* Parse the packet type */
1641 case SILC_PACKET_DISCONNECT:
1642 SILC_LOG_DEBUG(("Disconnect packet"));
1643 if (packet->flags & SILC_PACKET_FLAG_LIST)
1647 case SILC_PACKET_SUCCESS:
1649 * Success received for something. For now we can have only
1650 * one protocol for connection executing at once hence this
1651 * success message is for whatever protocol is executing currently.
1653 SILC_LOG_DEBUG(("Success packet"));
1654 if (packet->flags & SILC_PACKET_FLAG_LIST)
1657 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1660 case SILC_PACKET_FAILURE:
1662 * Failure received for something. For now we can have only
1663 * one protocol for connection executing at once hence this
1664 * failure message is for whatever protocol is executing currently.
1666 SILC_LOG_DEBUG(("Failure packet"));
1667 if (packet->flags & SILC_PACKET_FLAG_LIST)
1669 if (sock->protocol) {
1670 SilcServerFailureContext f;
1671 f = silc_calloc(1, sizeof(*f));
1675 /* We will wait 5 seconds to process this failure packet */
1676 silc_task_register(server->timeout_queue, sock->sock,
1677 silc_server_failure_callback, (void *)f, 5, 0,
1678 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1682 case SILC_PACKET_REJECT:
1683 SILC_LOG_DEBUG(("Reject packet"));
1684 if (packet->flags & SILC_PACKET_FLAG_LIST)
1689 case SILC_PACKET_NOTIFY:
1691 * Received notify packet. Server can receive notify packets from
1692 * router. Server then relays the notify messages to clients if needed.
1694 SILC_LOG_DEBUG(("Notify packet"));
1695 if (packet->flags & SILC_PACKET_FLAG_LIST)
1696 silc_server_notify_list(server, sock, packet);
1698 silc_server_notify(server, sock, packet);
1704 case SILC_PACKET_CHANNEL_MESSAGE:
1706 * Received channel message. Channel messages are special packets
1707 * (although probably most common ones) thus they are handled
1710 SILC_LOG_DEBUG(("Channel Message packet"));
1711 if (packet->flags & SILC_PACKET_FLAG_LIST)
1713 silc_server_channel_message(server, sock, packet);
1716 case SILC_PACKET_CHANNEL_KEY:
1718 * Received key for channel. As channels are created by the router
1719 * the keys are as well. We will distribute the key to all of our
1720 * locally connected clients on the particular channel. Router
1721 * never receives this channel and thus is ignored.
1723 SILC_LOG_DEBUG(("Channel Key packet"));
1724 if (packet->flags & SILC_PACKET_FLAG_LIST)
1726 silc_server_channel_key(server, sock, packet);
1732 case SILC_PACKET_COMMAND:
1734 * Recived command. Processes the command request and allocates the
1735 * command context and calls the command.
1737 SILC_LOG_DEBUG(("Command packet"));
1738 if (packet->flags & SILC_PACKET_FLAG_LIST)
1740 silc_server_command_process(server, sock, packet);
1743 case SILC_PACKET_COMMAND_REPLY:
1745 * Received command reply packet. Received command reply to command. It
1746 * may be reply to command sent by us or reply to command sent by client
1747 * that we've routed further.
1749 SILC_LOG_DEBUG(("Command Reply packet"));
1750 if (packet->flags & SILC_PACKET_FLAG_LIST)
1752 silc_server_command_reply(server, sock, packet);
1756 * Private Message packets
1758 case SILC_PACKET_PRIVATE_MESSAGE:
1760 * Received private message packet. The packet is coming from either
1763 SILC_LOG_DEBUG(("Private Message packet"));
1764 if (packet->flags & SILC_PACKET_FLAG_LIST)
1766 silc_server_private_message(server, sock, packet);
1769 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1771 * Private message key packet.
1773 if (packet->flags & SILC_PACKET_FLAG_LIST)
1775 silc_server_private_message_key(server, sock, packet);
1779 * Key Exchange protocol packets
1781 case SILC_PACKET_KEY_EXCHANGE:
1782 SILC_LOG_DEBUG(("KE packet"));
1783 if (packet->flags & SILC_PACKET_FLAG_LIST)
1786 if (sock->protocol && sock->protocol->protocol &&
1787 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1789 SilcServerKEInternalContext *proto_ctx =
1790 (SilcServerKEInternalContext *)sock->protocol->context;
1792 proto_ctx->packet = silc_packet_context_dup(packet);
1794 /* Let the protocol handle the packet */
1795 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 100000);
1797 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1798 "protocol active, packet dropped."));
1800 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1804 case SILC_PACKET_KEY_EXCHANGE_1:
1805 SILC_LOG_DEBUG(("KE 1 packet"));
1806 if (packet->flags & SILC_PACKET_FLAG_LIST)
1809 if (sock->protocol && sock->protocol->protocol &&
1810 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1811 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1813 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1814 SilcServerRekeyInternalContext *proto_ctx =
1815 (SilcServerRekeyInternalContext *)sock->protocol->context;
1817 if (proto_ctx->packet)
1818 silc_packet_context_free(proto_ctx->packet);
1820 proto_ctx->packet = silc_packet_context_dup(packet);
1822 /* Let the protocol handle the packet */
1823 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1825 SilcServerKEInternalContext *proto_ctx =
1826 (SilcServerKEInternalContext *)sock->protocol->context;
1828 if (proto_ctx->packet)
1829 silc_packet_context_free(proto_ctx->packet);
1831 proto_ctx->packet = silc_packet_context_dup(packet);
1832 proto_ctx->dest_id_type = packet->src_id_type;
1833 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1834 packet->src_id_type);
1835 if (!proto_ctx->dest_id)
1838 /* Let the protocol handle the packet */
1839 silc_protocol_execute(sock->protocol, server->timeout_queue,
1843 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1844 "protocol active, packet dropped."));
1848 case SILC_PACKET_KEY_EXCHANGE_2:
1849 SILC_LOG_DEBUG(("KE 2 packet"));
1850 if (packet->flags & SILC_PACKET_FLAG_LIST)
1853 if (sock->protocol && sock->protocol->protocol &&
1854 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1855 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1857 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1858 SilcServerRekeyInternalContext *proto_ctx =
1859 (SilcServerRekeyInternalContext *)sock->protocol->context;
1861 if (proto_ctx->packet)
1862 silc_packet_context_free(proto_ctx->packet);
1864 proto_ctx->packet = silc_packet_context_dup(packet);
1866 /* Let the protocol handle the packet */
1867 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1869 SilcServerKEInternalContext *proto_ctx =
1870 (SilcServerKEInternalContext *)sock->protocol->context;
1872 if (proto_ctx->packet)
1873 silc_packet_context_free(proto_ctx->packet);
1875 proto_ctx->packet = silc_packet_context_dup(packet);
1876 proto_ctx->dest_id_type = packet->src_id_type;
1877 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1878 packet->src_id_type);
1879 if (!proto_ctx->dest_id)
1882 /* Let the protocol handle the packet */
1883 silc_protocol_execute(sock->protocol, server->timeout_queue,
1887 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1888 "protocol active, packet dropped."));
1892 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1894 * Connection authentication request packet. When we receive this packet
1895 * we will send to the other end information about our mandatory
1896 * authentication method for the connection. This packet maybe received
1899 SILC_LOG_DEBUG(("Connection authentication request packet"));
1900 if (packet->flags & SILC_PACKET_FLAG_LIST)
1902 silc_server_connection_auth_request(server, sock, packet);
1906 * Connection Authentication protocol packets
1908 case SILC_PACKET_CONNECTION_AUTH:
1909 /* Start of the authentication protocol. We receive here the
1910 authentication data and will verify it. */
1911 SILC_LOG_DEBUG(("Connection auth packet"));
1912 if (packet->flags & SILC_PACKET_FLAG_LIST)
1915 if (sock->protocol && sock->protocol->protocol->type
1916 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1918 SilcServerConnAuthInternalContext *proto_ctx =
1919 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1921 proto_ctx->packet = silc_packet_context_dup(packet);
1923 /* Let the protocol handle the packet */
1924 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
1926 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1927 "protocol active, packet dropped."));
1931 case SILC_PACKET_NEW_ID:
1933 * Received New ID packet. This includes some new ID that has been
1934 * created. It may be for client, server or channel. This is the way
1935 * to distribute information about new registered entities in the
1938 SILC_LOG_DEBUG(("New ID packet"));
1939 if (packet->flags & SILC_PACKET_FLAG_LIST)
1940 silc_server_new_id_list(server, sock, packet);
1942 silc_server_new_id(server, sock, packet);
1945 case SILC_PACKET_NEW_CLIENT:
1947 * Received new client packet. This includes client information that
1948 * we will use to create initial client ID. After creating new
1949 * ID we will send it to the client.
1951 SILC_LOG_DEBUG(("New Client packet"));
1952 if (packet->flags & SILC_PACKET_FLAG_LIST)
1954 silc_server_new_client(server, sock, packet);
1957 case SILC_PACKET_NEW_SERVER:
1959 * Received new server packet. This includes Server ID and some other
1960 * information that we may save. This is received after server has
1963 SILC_LOG_DEBUG(("New Server packet"));
1964 if (packet->flags & SILC_PACKET_FLAG_LIST)
1966 silc_server_new_server(server, sock, packet);
1969 case SILC_PACKET_NEW_CHANNEL:
1971 * Received new channel packet. Information about new channel in the
1972 * network are distributed using this packet.
1974 SILC_LOG_DEBUG(("New Channel packet"));
1975 if (packet->flags & SILC_PACKET_FLAG_LIST)
1976 silc_server_new_channel_list(server, sock, packet);
1978 silc_server_new_channel(server, sock, packet);
1981 case SILC_PACKET_HEARTBEAT:
1983 * Received heartbeat.
1985 SILC_LOG_DEBUG(("Heartbeat packet"));
1986 if (packet->flags & SILC_PACKET_FLAG_LIST)
1990 case SILC_PACKET_KEY_AGREEMENT:
1992 * Received heartbeat.
1994 SILC_LOG_DEBUG(("Key agreement packet"));
1995 if (packet->flags & SILC_PACKET_FLAG_LIST)
1997 silc_server_key_agreement(server, sock, packet);
2000 case SILC_PACKET_REKEY:
2002 * Received re-key packet. The sender wants to regenerate the session
2005 SILC_LOG_DEBUG(("Re-key packet"));
2006 if (packet->flags & SILC_PACKET_FLAG_LIST)
2008 silc_server_rekey(server, sock, packet);
2011 case SILC_PACKET_REKEY_DONE:
2013 * The re-key is done.
2015 SILC_LOG_DEBUG(("Re-key done packet"));
2016 if (packet->flags & SILC_PACKET_FLAG_LIST)
2019 if (sock->protocol && sock->protocol->protocol &&
2020 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2022 SilcServerRekeyInternalContext *proto_ctx =
2023 (SilcServerRekeyInternalContext *)sock->protocol->context;
2025 if (proto_ctx->packet)
2026 silc_packet_context_free(proto_ctx->packet);
2028 proto_ctx->packet = silc_packet_context_dup(packet);
2030 /* Let the protocol handle the packet */
2031 silc_protocol_execute(sock->protocol, server->timeout_queue, 0, 0);
2033 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2034 "protocol active, packet dropped."));
2039 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2045 /* Creates connection to a remote router. */
2047 void silc_server_create_connection(SilcServer server,
2048 char *remote_host, uint32 port)
2050 SilcServerConnection sconn;
2052 /* Allocate connection object for hold connection specific stuff. */
2053 sconn = silc_calloc(1, sizeof(*sconn));
2054 sconn->server = server;
2055 sconn->remote_host = strdup(remote_host);
2056 sconn->remote_port = port;
2058 silc_task_register(server->timeout_queue, 0,
2059 silc_server_connect_router,
2060 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2061 SILC_TASK_PRI_NORMAL);
2064 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2066 silc_socket_free((SilcSocketConnection)context);
2069 /* Closes connection to socket connection */
2071 void silc_server_close_connection(SilcServer server,
2072 SilcSocketConnection sock)
2074 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2076 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2077 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2078 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2079 "Router"), sock->sock));
2081 /* We won't listen for this connection anymore */
2082 silc_schedule_unset_listen_fd(sock->sock);
2084 /* Unregister all tasks */
2085 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2086 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2088 /* Close the actual connection */
2089 silc_net_close_connection(sock->sock);
2090 server->sockets[sock->sock] = NULL;
2092 silc_task_register(server->timeout_queue, 0,
2093 silc_server_close_connection_final,
2094 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2095 SILC_TASK_PRI_NORMAL);
2098 /* Sends disconnect message to remote connection and disconnects the
2101 void silc_server_disconnect_remote(SilcServer server,
2102 SilcSocketConnection sock,
2103 const char *fmt, ...)
2106 unsigned char buf[4096];
2111 memset(buf, 0, sizeof(buf));
2113 vsprintf(buf, fmt, ap);
2116 SILC_LOG_DEBUG(("Disconnecting remote host"));
2118 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2120 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2121 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2122 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2125 /* Notify remote end that the conversation is over. The notify message
2126 is tried to be sent immediately. */
2127 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2128 buf, strlen(buf), TRUE);
2130 /* Mark the connection to be disconnected */
2131 SILC_SET_DISCONNECTED(sock);
2132 silc_server_close_connection(server, sock);
2137 SilcClientEntry client;
2138 } *FreeClientInternal;
2140 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2142 FreeClientInternal i = (FreeClientInternal)context;
2144 silc_idlist_del_data(i->client);
2145 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2149 /* Frees client data and notifies about client's signoff. */
2151 void silc_server_free_client_data(SilcServer server,
2152 SilcSocketConnection sock,
2153 SilcClientEntry client,
2157 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2159 /* If there is pending outgoing data for the client then purge it
2160 to the network before removing the client entry. */
2161 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2162 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2163 server->stat.packets_sent++;
2165 if (sock->outbuf->data - sock->outbuf->head)
2166 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2168 silc_packet_send(sock, TRUE);
2170 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2171 SILC_UNSET_OUTBUF_PENDING(sock);
2172 silc_buffer_clear(sock->outbuf);
2175 /* Send SIGNOFF notify to routers. */
2176 if (notify && !server->standalone && server->router)
2177 silc_server_send_notify_signoff(server, server->router->connection,
2178 server->server_type == SILC_SERVER ?
2179 FALSE : TRUE, client->id, signoff);
2181 /* Remove client from all channels */
2183 silc_server_remove_from_channels(server, NULL, client,
2184 TRUE, signoff, TRUE);
2186 silc_server_remove_from_channels(server, NULL, client,
2187 FALSE, NULL, FALSE);
2189 /* We will not delete the client entry right away. We will take it
2190 into history (for WHOWAS command) for 5 minutes */
2193 silc_task_register(server->timeout_queue, 0,
2194 silc_server_free_client_data_timeout,
2196 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2197 client->data.registered = FALSE;
2199 /* Free the client entry and everything in it */
2200 server->stat.my_clients--;
2201 server->stat.clients--;
2202 if (server->server_type == SILC_ROUTER)
2203 server->stat.cell_clients--;
2206 /* Frees user_data pointer from socket connection object. This also sends
2207 appropriate notify packets to the network to inform about leaving
2210 void silc_server_free_sock_user_data(SilcServer server,
2211 SilcSocketConnection sock)
2213 SILC_LOG_DEBUG(("Start"));
2215 switch(sock->type) {
2216 case SILC_SOCKET_TYPE_CLIENT:
2218 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2219 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2222 case SILC_SOCKET_TYPE_SERVER:
2223 case SILC_SOCKET_TYPE_ROUTER:
2225 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2227 /* Free all client entries that this server owns as they will
2228 become invalid now as well. */
2230 silc_server_remove_clients_by_server(server, user_data, TRUE);
2232 /* If this was our primary router connection then we're lost to
2233 the outside world. */
2234 if (server->router == user_data) {
2235 server->id_entry->router = NULL;
2236 server->router = NULL;
2237 server->standalone = TRUE;
2240 /* Free the server entry */
2241 silc_idlist_del_data(user_data);
2242 silc_idlist_del_server(server->local_list, user_data);
2243 server->stat.my_servers--;
2244 server->stat.servers--;
2245 if (server->server_type == SILC_ROUTER)
2246 server->stat.cell_servers--;
2251 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2253 silc_idlist_del_data(user_data);
2254 silc_free(user_data);
2259 sock->user_data = NULL;
2262 /* This function is used to remove all client entries by the server `entry'.
2263 This is called when the connection is lost to the server. In this case
2264 we must invalidate all the client entries owned by the server `entry'.
2265 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2266 distributed to our local clients. */
2268 int silc_server_remove_clients_by_server(SilcServer server,
2269 SilcServerEntry entry,
2272 SilcIDCacheList list = NULL;
2273 SilcIDCacheEntry id_cache = NULL;
2274 SilcClientEntry client = NULL;
2276 SilcClientEntry *clients = NULL;
2277 uint32 clients_c = 0;
2278 unsigned char **argv = NULL;
2279 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2282 SILC_LOG_DEBUG(("Start"));
2284 if (server_signoff) {
2285 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2286 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2287 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2288 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2289 argv[argc] = idp->data;
2290 argv_lens[argc] = idp->len;
2291 argv_types[argc] = argc + 1;
2293 silc_buffer_free(idp);
2296 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2298 if (silc_idcache_list_first(list, &id_cache)) {
2300 client = (SilcClientEntry)id_cache->context;
2301 if (client->data.registered == FALSE) {
2302 if (!silc_idcache_list_next(list, &id_cache))
2308 if (client->router != entry) {
2309 if (server_signoff && client->connection) {
2310 clients = silc_realloc(clients,
2311 sizeof(*clients) * (clients_c + 1));
2312 clients[clients_c] = client;
2316 if (!silc_idcache_list_next(list, &id_cache))
2322 if (server_signoff) {
2323 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2324 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2325 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2327 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2329 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2330 memcpy(argv[argc], idp->data, idp->len);
2331 argv_lens[argc] = idp->len;
2332 argv_types[argc] = argc + 1;
2334 silc_buffer_free(idp);
2337 /* Remove the client entry */
2338 silc_server_remove_from_channels(server, NULL, client, FALSE,
2340 silc_idlist_del_client(server->local_list, client);
2342 if (!silc_idcache_list_next(list, &id_cache))
2346 silc_idcache_list_free(list);
2349 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2351 if (silc_idcache_list_first(list, &id_cache)) {
2353 client = (SilcClientEntry)id_cache->context;
2354 if (client->data.registered == FALSE) {
2355 if (!silc_idcache_list_next(list, &id_cache))
2361 if (client->router != entry) {
2362 if (server_signoff && client->connection) {
2363 clients = silc_realloc(clients,
2364 sizeof(*clients) * (clients_c + 1));
2365 clients[clients_c] = client;
2369 if (!silc_idcache_list_next(list, &id_cache))
2375 if (server_signoff) {
2376 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2377 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2378 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2380 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2382 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2383 memcpy(argv[argc], idp->data, idp->len);
2384 argv_lens[argc] = idp->len;
2385 argv_types[argc] = argc + 1;
2387 silc_buffer_free(idp);
2390 /* Remove the client entry */
2391 silc_server_remove_from_channels(server, NULL, client, FALSE,
2393 silc_idlist_del_client(server->global_list, client);
2395 if (!silc_idcache_list_next(list, &id_cache))
2399 silc_idcache_list_free(list);
2402 /* Send the SERVER_SIGNOFF notify */
2403 if (server_signoff) {
2406 /* Send SERVER_SIGNOFF notify to our primary router */
2407 if (!server->standalone && server->router) {
2408 args = silc_argument_payload_encode(1, argv, argv_lens,
2410 silc_server_send_notify_args(server,
2411 server->router->connection,
2412 server->server_type == SILC_SERVER ?
2414 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2416 silc_buffer_free(args);
2419 args = silc_argument_payload_encode(argc, argv, argv_lens,
2421 /* Send to local clients */
2422 for (i = 0; i < clients_c; i++) {
2423 silc_server_send_notify_args(server, clients[i]->connection,
2424 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2429 silc_buffer_free(args);
2431 silc_free(argv_lens);
2432 silc_free(argv_types);
2438 /* Checks whether given channel has global users. If it does this returns
2439 TRUE and FALSE if there is only locally connected clients on the channel. */
2441 int silc_server_channel_has_global(SilcChannelEntry channel)
2443 SilcChannelClientEntry chl;
2444 SilcHashTableList htl;
2446 silc_hash_table_list(channel->user_list, &htl);
2447 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2448 if (chl->client->router)
2455 /* Checks whether given channel has locally connected users. If it does this
2456 returns TRUE and FALSE if there is not one locally connected client. */
2458 int silc_server_channel_has_local(SilcChannelEntry channel)
2460 SilcChannelClientEntry chl;
2461 SilcHashTableList htl;
2463 silc_hash_table_list(channel->user_list, &htl);
2464 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2465 if (!chl->client->router)
2472 /* Removes client from all channels it has joined. This is used when client
2473 connection is disconnected. If the client on a channel is last, the
2474 channel is removed as well. This sends the SIGNOFF notify types. */
2476 void silc_server_remove_from_channels(SilcServer server,
2477 SilcSocketConnection sock,
2478 SilcClientEntry client,
2480 char *signoff_message,
2483 SilcChannelEntry channel;
2484 SilcChannelClientEntry chl;
2485 SilcHashTableList htl;
2488 SILC_LOG_DEBUG(("Start"));
2490 if (!client || !client->id)
2493 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2495 /* Remove the client from all channels. The client is removed from
2496 the channels' user list. */
2497 silc_hash_table_list(client->channels, &htl);
2498 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2499 channel = chl->channel;
2501 /* Remove channel from client's channel list */
2502 silc_hash_table_del(client->channels, channel);
2504 /* Remove channel if there is no users anymore */
2505 if (server->server_type == SILC_ROUTER &&
2506 silc_hash_table_count(channel->user_list) < 2) {
2508 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2509 if (!silc_idlist_del_channel(server->local_list, channel))
2510 silc_idlist_del_channel(server->global_list, channel);
2511 server->stat.my_channels--;
2515 /* Remove client from channel's client list */
2516 silc_hash_table_del(channel->user_list, chl->client);
2518 server->stat.my_chanclients--;
2520 /* If there is no global users on the channel anymore mark the channel
2521 as local channel. */
2522 if (server->server_type == SILC_SERVER &&
2523 !silc_server_channel_has_global(channel))
2524 channel->global_users = FALSE;
2526 /* If there is not at least one local user on the channel then we don't
2527 need the channel entry anymore, we can remove it safely. */
2528 if (server->server_type == SILC_SERVER &&
2529 !silc_server_channel_has_local(channel)) {
2530 /* Notify about leaving client if this channel has global users. */
2531 if (notify && channel->global_users)
2532 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2533 SILC_NOTIFY_TYPE_SIGNOFF,
2534 signoff_message ? 2 : 1,
2535 clidp->data, clidp->len,
2536 signoff_message, signoff_message ?
2537 strlen(signoff_message) : 0);
2540 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2542 if (channel->founder_key) {
2543 /* The founder auth data exists, do not remove the channel entry */
2544 SilcChannelClientEntry chl2;
2545 SilcHashTableList htl2;
2549 silc_hash_table_list(channel->user_list, &htl2);
2550 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2551 silc_hash_table_del(chl2->client->channels, channel);
2552 silc_hash_table_del(channel->user_list, chl2->client);
2558 /* Remove the channel entry */
2559 if (!silc_idlist_del_channel(server->local_list, channel))
2560 silc_idlist_del_channel(server->global_list, channel);
2561 server->stat.my_channels--;
2565 /* Send notify to channel about client leaving SILC and thus
2566 the entire channel. */
2568 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2569 SILC_NOTIFY_TYPE_SIGNOFF,
2570 signoff_message ? 2 : 1,
2571 clidp->data, clidp->len,
2572 signoff_message, signoff_message ?
2573 strlen(signoff_message) : 0);
2575 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2576 /* Re-generate channel key */
2577 silc_server_create_channel_key(server, channel, 0);
2579 /* Send the channel key to the channel. The key of course is not sent
2580 to the client who was removed from the channel. */
2581 silc_server_send_channel_key(server, client->connection, channel,
2582 server->server_type == SILC_ROUTER ?
2583 FALSE : !server->standalone);
2587 silc_buffer_free(clidp);
2590 /* Removes client from one channel. This is used for example when client
2591 calls LEAVE command to remove itself from the channel. Returns TRUE
2592 if channel still exists and FALSE if the channel is removed when
2593 last client leaves the channel. If `notify' is FALSE notify messages
2596 int silc_server_remove_from_one_channel(SilcServer server,
2597 SilcSocketConnection sock,
2598 SilcChannelEntry channel,
2599 SilcClientEntry client,
2602 SilcChannelClientEntry chl;
2605 SILC_LOG_DEBUG(("Start"));
2607 /* Get the entry to the channel, if this client is not on the channel
2609 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2612 /* Remove the client from the channel. The client is removed from
2613 the channel's user list. */
2615 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2617 /* Remove channel from client's channel list */
2618 silc_hash_table_del(client->channels, chl->channel);
2620 /* Remove channel if there is no users anymore */
2621 if (server->server_type == SILC_ROUTER &&
2622 silc_hash_table_count(channel->user_list) < 2) {
2624 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2625 if (!silc_idlist_del_channel(server->local_list, channel))
2626 silc_idlist_del_channel(server->global_list, channel);
2627 silc_buffer_free(clidp);
2628 server->stat.my_channels--;
2632 /* Remove client from channel's client list */
2633 silc_hash_table_del(channel->user_list, chl->client);
2635 server->stat.my_chanclients--;
2637 /* If there is no global users on the channel anymore mark the channel
2638 as local channel. */
2639 if (server->server_type == SILC_SERVER &&
2640 !silc_server_channel_has_global(channel))
2641 channel->global_users = FALSE;
2643 /* If there is not at least one local user on the channel then we don't
2644 need the channel entry anymore, we can remove it safely. */
2645 if (server->server_type == SILC_SERVER &&
2646 !silc_server_channel_has_local(channel)) {
2647 /* Notify about leaving client if this channel has global users. */
2648 if (notify && channel->global_users)
2649 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2650 SILC_NOTIFY_TYPE_LEAVE, 1,
2651 clidp->data, clidp->len);
2653 silc_buffer_free(clidp);
2656 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2658 if (channel->founder_key) {
2659 /* The founder auth data exists, do not remove the channel entry */
2660 SilcChannelClientEntry chl2;
2661 SilcHashTableList htl2;
2665 silc_hash_table_list(channel->user_list, &htl2);
2666 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2667 silc_hash_table_del(chl2->client->channels, channel);
2668 silc_hash_table_del(channel->user_list, chl2->client);
2674 /* Remove the channel entry */
2675 if (!silc_idlist_del_channel(server->local_list, channel))
2676 silc_idlist_del_channel(server->global_list, channel);
2677 server->stat.my_channels--;
2681 /* Send notify to channel about client leaving the channel */
2683 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2684 SILC_NOTIFY_TYPE_LEAVE, 1,
2685 clidp->data, clidp->len);
2687 silc_buffer_free(clidp);
2691 /* Returns TRUE if the given client is on the channel. FALSE if not.
2692 This works because we assure that the user list on the channel is
2693 always in up to date thus we can only check the channel list from
2694 `client' which is faster than checking the user list from `channel'. */
2696 int silc_server_client_on_channel(SilcClientEntry client,
2697 SilcChannelEntry channel)
2699 if (!client || !channel)
2702 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2708 /* Timeout callback. This is called if connection is idle or for some
2709 other reason is not responding within some period of time. This
2710 disconnects the remote end. */
2712 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2714 SilcServer server = (SilcServer)context;
2715 SilcSocketConnection sock = server->sockets[fd];
2717 SILC_LOG_DEBUG(("Start"));
2722 /* If we have protocol active we must assure that we call the protocol's
2723 final callback so that all the memory is freed. */
2724 if (sock->protocol) {
2725 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2726 silc_protocol_execute_final(sock->protocol, server->timeout_queue);
2730 if (sock->user_data)
2731 silc_server_free_sock_user_data(server, sock);
2733 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2734 "Connection timeout");
2737 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2738 function may be used only by router. In real SILC network all channels
2739 are created by routers thus this function is never used by normal
2742 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2743 SilcServerID *router_id,
2749 SilcChannelID *channel_id;
2750 SilcChannelEntry entry;
2754 SILC_LOG_DEBUG(("Creating new channel"));
2757 cipher = "aes-256-cbc";
2759 hmac = "hmac-sha1-96";
2761 /* Allocate cipher */
2762 if (!silc_cipher_alloc(cipher, &key))
2766 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2767 silc_cipher_free(key);
2771 channel_name = strdup(channel_name);
2773 /* Create the channel */
2774 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2775 entry = silc_idlist_add_channel(server->local_list, channel_name,
2776 SILC_CHANNEL_MODE_NONE, channel_id,
2777 NULL, key, newhmac);
2779 silc_free(channel_name);
2780 silc_cipher_free(key);
2781 silc_hmac_free(newhmac);
2785 entry->cipher = strdup(cipher);
2786 entry->hmac_name = strdup(hmac);
2788 /* Now create the actual key material */
2789 silc_server_create_channel_key(server, entry,
2790 silc_cipher_get_key_len(key) / 8);
2792 /* Notify other routers about the new channel. We send the packet
2793 to our primary route. */
2794 if (broadcast && server->standalone == FALSE)
2795 silc_server_send_new_channel(server, server->router->connection, TRUE,
2796 channel_name, entry->id,
2797 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2800 server->stat.my_channels++;
2805 /* Same as above but creates the channel with Channel ID `channel_id. */
2808 silc_server_create_new_channel_with_id(SilcServer server,
2812 SilcChannelID *channel_id,
2815 SilcChannelEntry entry;
2819 SILC_LOG_DEBUG(("Creating new channel"));
2822 cipher = "aes-256-cbc";
2824 hmac = "hmac-sha1-96";
2826 /* Allocate cipher */
2827 if (!silc_cipher_alloc(cipher, &key))
2831 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2832 silc_cipher_free(key);
2836 channel_name = strdup(channel_name);
2838 /* Create the channel */
2839 entry = silc_idlist_add_channel(server->local_list, channel_name,
2840 SILC_CHANNEL_MODE_NONE, channel_id,
2841 NULL, key, newhmac);
2843 silc_free(channel_name);
2847 /* Now create the actual key material */
2848 silc_server_create_channel_key(server, entry,
2849 silc_cipher_get_key_len(key) / 8);
2851 /* Notify other routers about the new channel. We send the packet
2852 to our primary route. */
2853 if (broadcast && server->standalone == FALSE)
2854 silc_server_send_new_channel(server, server->router->connection, TRUE,
2855 channel_name, entry->id,
2856 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2859 server->stat.my_channels++;
2864 /* Channel's key re-key timeout callback. */
2866 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2868 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2869 SilcServer server = (SilcServer)rekey->context;
2871 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2872 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2874 silc_task_register(server->timeout_queue, 0,
2875 silc_server_channel_key_rekey,
2876 (void *)rekey, 3600, 0,
2878 SILC_TASK_PRI_NORMAL);
2881 /* Generates new channel key. This is used to create the initial channel key
2882 but also to re-generate new key for channel. If `key_len' is provided
2883 it is the bytes of the key length. */
2885 void silc_server_create_channel_key(SilcServer server,
2886 SilcChannelEntry channel,
2890 unsigned char channel_key[32], hash[32];
2893 SILC_LOG_DEBUG(("Generating channel key"));
2895 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2896 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2900 if (!channel->channel_key)
2901 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2906 else if (channel->key_len)
2907 len = channel->key_len / 8;
2909 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2911 /* Create channel key */
2912 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2915 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2917 /* Remove old key if exists */
2919 memset(channel->key, 0, channel->key_len / 8);
2920 silc_free(channel->key);
2924 channel->key_len = len * 8;
2925 channel->key = silc_calloc(len, sizeof(*channel->key));
2926 memcpy(channel->key, channel_key, len);
2927 memset(channel_key, 0, sizeof(channel_key));
2929 /* Generate HMAC key from the channel key data and set it */
2931 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2932 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2933 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2934 memset(hash, 0, sizeof(hash));
2936 if (server->server_type == SILC_ROUTER) {
2937 if (!channel->rekey)
2938 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2939 channel->rekey->context = (void *)server;
2940 channel->rekey->channel = channel;
2941 channel->rekey->key_len = key_len;
2943 silc_task_unregister_by_callback(server->timeout_queue,
2944 silc_server_channel_key_rekey);
2945 silc_task_register(server->timeout_queue, 0,
2946 silc_server_channel_key_rekey,
2947 (void *)channel->rekey, 3600, 0,
2949 SILC_TASK_PRI_NORMAL);
2953 /* Saves the channel key found in the encoded `key_payload' buffer. This
2954 function is used when we receive Channel Key Payload and also when we're
2955 processing JOIN command reply. Returns entry to the channel. */
2957 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2958 SilcBuffer key_payload,
2959 SilcChannelEntry channel)
2961 SilcChannelKeyPayload payload = NULL;
2962 SilcChannelID *id = NULL;
2963 unsigned char *tmp, hash[32];
2967 SILC_LOG_DEBUG(("Start"));
2969 /* Decode channel key payload */
2970 payload = silc_channel_key_payload_parse(key_payload);
2972 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2977 /* Get the channel entry */
2980 /* Get channel ID */
2981 tmp = silc_channel_key_get_id(payload, &tmp_len);
2982 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2988 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2990 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2992 SILC_LOG_ERROR(("Received key for non-existent channel"));
2998 tmp = silc_channel_key_get_key(payload, &tmp_len);
3004 cipher = silc_channel_key_get_cipher(payload, NULL);
3010 /* Remove old key if exists */
3012 memset(channel->key, 0, channel->key_len / 8);
3013 silc_free(channel->key);
3014 silc_cipher_free(channel->channel_key);
3017 /* Create new cipher */
3018 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3023 if (channel->cipher)
3024 silc_free(channel->cipher);
3025 channel->cipher = strdup(cipher);
3028 channel->key_len = tmp_len * 8;
3029 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3030 memcpy(channel->key, tmp, tmp_len);
3031 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3033 /* Generate HMAC key from the channel key data and set it */
3035 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
3036 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3037 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3039 memset(hash, 0, sizeof(hash));
3040 memset(tmp, 0, tmp_len);
3042 if (server->server_type == SILC_ROUTER) {
3043 if (!channel->rekey)
3044 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3045 channel->rekey->context = (void *)server;
3046 channel->rekey->channel = channel;
3048 silc_task_unregister_by_callback(server->timeout_queue,
3049 silc_server_channel_key_rekey);
3050 silc_task_register(server->timeout_queue, 0,
3051 silc_server_channel_key_rekey,
3052 (void *)channel->rekey, 3600, 0,
3054 SILC_TASK_PRI_NORMAL);
3061 silc_channel_key_payload_free(payload);
3066 /* Heartbeat callback. This function is set as argument for the
3067 silc_socket_set_heartbeat function. The library will call this function
3068 at the set time interval. */
3070 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3073 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3075 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3078 /* Send the heartbeat */
3079 silc_server_send_heartbeat(hb->server, sock);
3082 /* Returns assembled of all servers in the given ID list. The packet's
3083 form is dictated by the New ID payload. */
3085 static void silc_server_announce_get_servers(SilcServer server,
3087 SilcBuffer *servers)
3089 SilcIDCacheList list;
3090 SilcIDCacheEntry id_cache;
3091 SilcServerEntry entry;
3094 /* Go through all clients in the list */
3095 if (silc_idcache_get_all(id_list->servers, &list)) {
3096 if (silc_idcache_list_first(list, &id_cache)) {
3098 entry = (SilcServerEntry)id_cache->context;
3100 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3102 *servers = silc_buffer_realloc(*servers,
3104 (*servers)->truelen + idp->len :
3106 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3107 silc_buffer_put(*servers, idp->data, idp->len);
3108 silc_buffer_pull(*servers, idp->len);
3109 silc_buffer_free(idp);
3111 if (!silc_idcache_list_next(list, &id_cache))
3116 silc_idcache_list_free(list);
3120 /* This function is used by router to announce existing servers to our
3121 primary router when we've connected to it. */
3123 void silc_server_announce_servers(SilcServer server)
3125 SilcBuffer servers = NULL;
3127 SILC_LOG_DEBUG(("Announcing servers"));
3129 /* Get servers in local list */
3130 silc_server_announce_get_servers(server, server->local_list, &servers);
3132 /* Get servers in global list */
3133 silc_server_announce_get_servers(server, server->global_list, &servers);
3136 silc_buffer_push(servers, servers->data - servers->head);
3137 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3139 /* Send the packet */
3140 silc_server_packet_send(server, server->router->connection,
3141 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3142 servers->data, servers->len, TRUE);
3144 silc_buffer_free(servers);
3148 /* Returns assembled packet of all clients in the given ID list. The
3149 packet's form is dictated by the New ID Payload. */
3151 static void silc_server_announce_get_clients(SilcServer server,
3153 SilcBuffer *clients)
3155 SilcIDCacheList list;
3156 SilcIDCacheEntry id_cache;
3157 SilcClientEntry client;
3160 /* Go through all clients in the list */
3161 if (silc_idcache_get_all(id_list->clients, &list)) {
3162 if (silc_idcache_list_first(list, &id_cache)) {
3164 client = (SilcClientEntry)id_cache->context;
3166 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3168 *clients = silc_buffer_realloc(*clients,
3170 (*clients)->truelen + idp->len :
3172 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3173 silc_buffer_put(*clients, idp->data, idp->len);
3174 silc_buffer_pull(*clients, idp->len);
3175 silc_buffer_free(idp);
3177 if (!silc_idcache_list_next(list, &id_cache))
3182 silc_idcache_list_free(list);
3186 /* This function is used to announce our existing clients to our router
3187 when we've connected to it. */
3189 void silc_server_announce_clients(SilcServer server)
3191 SilcBuffer clients = NULL;
3193 SILC_LOG_DEBUG(("Announcing clients"));
3195 /* Get clients in local list */
3196 silc_server_announce_get_clients(server, server->local_list,
3199 /* As router we announce our global list as well */
3200 if (server->server_type == SILC_ROUTER)
3201 silc_server_announce_get_clients(server, server->global_list,
3205 silc_buffer_push(clients, clients->data - clients->head);
3206 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3208 /* Send the packet */
3209 silc_server_packet_send(server, server->router->connection,
3210 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3211 clients->data, clients->len, TRUE);
3213 silc_buffer_free(clients);
3218 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3223 return silc_notify_payload_encode(notify, argc, ap);
3226 /* Returns assembled packets for channel users of the `channel'. */
3228 void silc_server_announce_get_channel_users(SilcServer server,
3229 SilcChannelEntry channel,
3230 SilcBuffer *channel_users,
3231 SilcBuffer *channel_users_modes)
3233 SilcChannelClientEntry chl;
3234 SilcHashTableList htl;
3235 SilcBuffer chidp, clidp;
3238 unsigned char mode[4];
3240 SILC_LOG_DEBUG(("Start"));
3242 /* Now find all users on the channel */
3243 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3244 silc_hash_table_list(channel->user_list, &htl);
3245 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3246 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3249 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3250 clidp->data, clidp->len,
3251 chidp->data, chidp->len);
3254 silc_buffer_realloc(*channel_users,
3256 (*channel_users)->truelen + len : len));
3257 silc_buffer_pull_tail(*channel_users,
3258 ((*channel_users)->end -
3259 (*channel_users)->data));
3261 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3262 silc_buffer_pull(*channel_users, len);
3263 silc_buffer_free(tmp);
3265 /* CUMODE notify for mode change on the channel */
3266 SILC_PUT32_MSB(chl->mode, mode);
3267 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3268 3, clidp->data, clidp->len,
3270 clidp->data, clidp->len);
3272 *channel_users_modes =
3273 silc_buffer_realloc(*channel_users_modes,
3274 (*channel_users_modes ?
3275 (*channel_users_modes)->truelen + len : len));
3276 silc_buffer_pull_tail(*channel_users_modes,
3277 ((*channel_users_modes)->end -
3278 (*channel_users_modes)->data));
3280 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3281 silc_buffer_pull(*channel_users_modes, len);
3282 silc_buffer_free(tmp);
3284 silc_buffer_free(clidp);
3286 silc_buffer_free(chidp);
3289 /* Returns assembled packets for all channels and users on those channels
3290 from the given ID List. The packets are in the form dictated by the
3291 New Channel and New Channel User payloads. */
3293 void silc_server_announce_get_channels(SilcServer server,
3295 SilcBuffer *channels,
3296 SilcBuffer *channel_users,
3297 SilcBuffer *channel_users_modes)
3299 SilcIDCacheList list;
3300 SilcIDCacheEntry id_cache;
3301 SilcChannelEntry channel;
3307 SILC_LOG_DEBUG(("Start"));
3309 /* Go through all channels in the list */
3310 if (silc_idcache_get_all(id_list->channels, &list)) {
3311 if (silc_idcache_list_first(list, &id_cache)) {
3313 channel = (SilcChannelEntry)id_cache->context;
3315 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3316 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3317 name_len = strlen(channel->channel_name);
3319 len = 4 + name_len + id_len + 4;
3321 silc_buffer_realloc(*channels,
3322 (*channels ? (*channels)->truelen + len : len));
3323 silc_buffer_pull_tail(*channels,
3324 ((*channels)->end - (*channels)->data));
3325 silc_buffer_format(*channels,
3326 SILC_STR_UI_SHORT(name_len),
3327 SILC_STR_UI_XNSTRING(channel->channel_name,
3329 SILC_STR_UI_SHORT(id_len),
3330 SILC_STR_UI_XNSTRING(cid, id_len),
3331 SILC_STR_UI_INT(channel->mode),
3333 silc_buffer_pull(*channels, len);
3335 silc_server_announce_get_channel_users(server, channel,
3337 channel_users_modes);
3341 if (!silc_idcache_list_next(list, &id_cache))
3346 silc_idcache_list_free(list);
3350 /* This function is used to announce our existing channels to our router
3351 when we've connected to it. This also announces the users on the
3352 channels to the router. */
3354 void silc_server_announce_channels(SilcServer server)
3356 SilcBuffer channels = NULL, channel_users = NULL, channel_users_modes = NULL;
3358 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3360 /* Get channels and channel users in local list */
3361 silc_server_announce_get_channels(server, server->local_list,
3362 &channels, &channel_users,
3363 &channel_users_modes);
3365 /* Get channels and channel users in global list */
3366 silc_server_announce_get_channels(server, server->global_list,
3367 &channels, &channel_users,
3368 &channel_users_modes);
3371 silc_buffer_push(channels, channels->data - channels->head);
3372 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3374 /* Send the packet */
3375 silc_server_packet_send(server, server->router->connection,
3376 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3377 channels->data, channels->len,
3380 silc_buffer_free(channels);
3383 if (channel_users) {
3384 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3385 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3386 channel_users->len);
3388 /* Send the packet */
3389 silc_server_packet_send(server, server->router->connection,
3390 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3391 channel_users->data, channel_users->len,
3394 silc_buffer_free(channel_users);
3397 if (channel_users_modes) {
3398 silc_buffer_push(channel_users_modes,
3399 channel_users_modes->data - channel_users_modes->head);
3400 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes->data,
3401 channel_users_modes->len);
3403 /* Send the packet */
3404 silc_server_packet_send(server, server->router->connection,
3405 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3406 channel_users_modes->data,
3407 channel_users_modes->len,
3410 silc_buffer_free(channel_users_modes);
3414 /* Failure timeout callback. If this is called then we will immediately
3415 process the received failure. We always process the failure with timeout
3416 since we do not want to blindly trust to received failure packets.
3417 This won't be called (the timeout is cancelled) if the failure was
3418 bogus (it is bogus if remote does not close the connection after sending
3421 SILC_TASK_CALLBACK(silc_server_failure_callback)
3423 SilcServerFailureContext f = (SilcServerFailureContext)context;
3425 if (f->sock->protocol) {
3426 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3427 silc_protocol_execute(f->sock->protocol, f->server->timeout_queue, 0, 0);
3433 /* Assembles user list and users mode list from the `channel'. */
3435 void silc_server_get_users_on_channel(SilcServer server,
3436 SilcChannelEntry channel,
3437 SilcBuffer *user_list,
3438 SilcBuffer *mode_list,
3441 SilcChannelClientEntry chl;
3442 SilcHashTableList htl;
3443 SilcBuffer client_id_list;
3444 SilcBuffer client_mode_list;
3446 uint32 list_count = 0;
3448 /* XXX rewrite - this does not support IPv6 based Client ID's. */
3451 silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3452 silc_hash_table_count(channel->user_list));
3454 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3455 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3456 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3457 silc_hash_table_list(channel->user_list, &htl);
3458 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3460 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3461 silc_buffer_put(client_id_list, idp->data, idp->len);
3462 silc_buffer_pull(client_id_list, idp->len);
3463 silc_buffer_free(idp);
3465 /* Client's mode on channel */
3466 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3467 silc_buffer_pull(client_mode_list, 4);
3471 silc_buffer_push(client_id_list,
3472 client_id_list->data - client_id_list->head);
3473 silc_buffer_push(client_mode_list,
3474 client_mode_list->data - client_mode_list->head);
3476 *user_list = client_id_list;
3477 *mode_list = client_mode_list;
3478 *user_count = list_count;
3481 /* Saves users and their modes to the `channel'. */
3483 void silc_server_save_users_on_channel(SilcServer server,
3484 SilcSocketConnection sock,
3485 SilcChannelEntry channel,
3486 SilcClientID *noadd,
3487 SilcBuffer user_list,
3488 SilcBuffer mode_list,
3493 /* Cache the received Client ID's and modes. This cache expires
3494 whenever server sends notify message to channel. It means two things;
3495 some user has joined or leaved the channel. XXX TODO! */
3496 for (i = 0; i < user_count; i++) {
3499 SilcClientID *client_id;
3500 SilcClientEntry client;
3503 SILC_GET16_MSB(idp_len, user_list->data + 2);
3505 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3506 silc_buffer_pull(user_list, idp_len);
3511 SILC_GET32_MSB(mode, mode_list->data);
3512 silc_buffer_pull(mode_list, 4);
3514 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3515 silc_free(client_id);
3519 /* Check if we have this client cached already. */
3520 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3523 client = silc_idlist_find_client_by_id(server->global_list,
3526 /* If router did not find such Client ID in its lists then this must
3527 be bogus client or some router in the net is buggy. */
3528 if (server->server_type == SILC_ROUTER) {
3529 silc_free(client_id);
3533 /* We don't have that client anywhere, add it. The client is added
3534 to global list since server didn't have it in the lists so it must be
3536 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3537 silc_id_dup(client_id, SILC_ID_CLIENT),
3538 sock->user_data, NULL);
3540 silc_free(client_id);
3544 client->data.registered = TRUE;
3547 silc_free(client_id);
3549 if (!silc_server_client_on_channel(client, channel)) {
3550 /* Client was not on the channel, add it. */
3551 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3552 chl->client = client;
3554 chl->channel = channel;
3555 silc_hash_table_add(channel->user_list, chl->client, chl);
3556 silc_hash_table_add(client->channels, chl->channel, chl);
3561 /* Lookups route to the client indicated by the `id_data'. The connection
3562 object and internal data object is returned. Returns NULL if route
3563 could not be found to the client. If the `client_id' is specified then
3564 it is used and the `id_data' is ignored. */
3566 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3567 unsigned char *id_data,
3569 SilcClientID *client_id,
3570 SilcIDListData *idata)
3573 SilcClientEntry client;
3575 SILC_LOG_DEBUG(("Start"));
3577 /* Decode destination Client ID */
3579 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3581 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3585 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3588 /* If the destination belongs to our server we don't have to route
3589 the packet anywhere but to send it to the local destination. */
3590 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3594 if (client && client->data.registered == FALSE)
3597 /* If we are router and the client has router then the client is in
3598 our cell but not directly connected to us. */
3599 if (server->server_type == SILC_ROUTER && client->router) {
3600 /* We are of course in this case the client's router thus the real
3601 "router" of the client is the server who owns the client. Thus
3602 we will send the packet to that server. */
3604 *idata = (SilcIDListData)client->router;
3605 return client->router->connection;
3608 /* Seems that client really is directly connected to us */
3610 *idata = (SilcIDListData)client;
3611 return client->connection;
3614 /* Destination belongs to someone not in this server. If we are normal
3615 server our action is to send the packet to our router. */
3616 if (server->server_type == SILC_SERVER && !server->standalone) {
3619 *idata = (SilcIDListData)server->router;
3620 return server->router->connection;
3623 /* We are router and we will perform route lookup for the destination
3624 and send the packet to fastest route. */
3625 if (server->server_type == SILC_ROUTER && !server->standalone) {
3626 /* Check first that the ID is valid */
3627 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3629 SilcSocketConnection dst_sock;
3631 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3635 *idata = (SilcIDListData)dst_sock->user_data;
3644 /* Encodes and returns channel list of channels the `client' has joined.
3645 Secret channels are not put to the list. */
3647 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3648 SilcClientEntry client)
3650 SilcBuffer buffer = NULL;
3651 SilcChannelEntry channel;
3652 SilcChannelClientEntry chl;
3653 SilcHashTableList htl;
3659 silc_hash_table_list(client->channels, &htl);
3660 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3661 channel = chl->channel;
3663 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3666 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3667 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3668 name_len = strlen(channel->channel_name);
3670 len = 4 + name_len + id_len + 4;
3671 buffer = silc_buffer_realloc(buffer,
3672 (buffer ? (buffer)->truelen + len : len));
3673 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3674 silc_buffer_format(buffer,
3675 SILC_STR_UI_SHORT(name_len),
3676 SILC_STR_UI_XNSTRING(channel->channel_name,
3678 SILC_STR_UI_SHORT(id_len),
3679 SILC_STR_UI_XNSTRING(cid, id_len),
3680 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3682 silc_buffer_pull(buffer, len);
3687 silc_buffer_push(buffer, buffer->data - buffer->head);
3692 /* Finds client entry by Client ID and if it is not found then resolves
3693 it using WHOIS command. */
3695 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3696 SilcClientID *client_id)
3698 SilcClientEntry client;
3700 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3702 client = silc_idlist_find_client_by_id(server->global_list,
3704 if (!client && server->server_type == SILC_ROUTER)
3708 if (!client && server->standalone)
3711 if (!client || !client->nickname || !client->username) {
3712 SilcBuffer buffer, idp;
3714 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3715 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3716 ++server->cmd_ident, 1,
3717 3, idp->data, idp->len);
3718 silc_server_packet_send(server, client ? client->router->connection :
3719 server->router->connection,
3720 SILC_PACKET_COMMAND, 0,
3721 buffer->data, buffer->len, FALSE);
3722 silc_buffer_free(idp);
3723 silc_buffer_free(buffer);
3729 /* A timeout callback for the re-key. We will be the initiator of the
3732 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3734 SilcSocketConnection sock = (SilcSocketConnection)context;
3735 SilcIDListData idata = (SilcIDListData)sock->user_data;
3736 SilcServer server = (SilcServer)idata->rekey->context;
3737 SilcProtocol protocol;
3738 SilcServerRekeyInternalContext *proto_ctx;
3740 SILC_LOG_DEBUG(("Start"));
3742 /* Allocate internal protocol context. This is sent as context
3744 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3745 proto_ctx->server = (void *)server;
3746 proto_ctx->sock = sock;
3747 proto_ctx->responder = FALSE;
3748 proto_ctx->pfs = idata->rekey->pfs;
3750 /* Perform rekey protocol. Will call the final callback after the
3751 protocol is over. */
3752 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3753 &protocol, proto_ctx, silc_server_rekey_final);
3754 sock->protocol = protocol;
3756 /* Run the protocol */
3757 silc_protocol_execute(protocol, server->timeout_queue, 0, 0);
3759 /* Re-register re-key timeout */
3760 silc_task_register(server->timeout_queue, sock->sock,
3761 silc_server_rekey_callback,
3762 context, idata->rekey->timeout, 0,
3763 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3766 /* The final callback for the REKEY protocol. This will actually take the
3767 new key material into use. */
3769 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3771 SilcProtocol protocol = (SilcProtocol)context;
3772 SilcServerRekeyInternalContext *ctx =
3773 (SilcServerRekeyInternalContext *)protocol->context;
3774 SilcServer server = (SilcServer)ctx->server;
3775 SilcSocketConnection sock = ctx->sock;
3777 SILC_LOG_DEBUG(("Start"));
3779 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3780 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3781 /* Error occured during protocol */
3782 silc_protocol_cancel(protocol, server->timeout_queue);
3783 silc_protocol_free(protocol);
3784 sock->protocol = NULL;
3786 silc_packet_context_free(ctx->packet);
3788 silc_ske_free(ctx->ske);
3794 silc_protocol_free(protocol);
3795 sock->protocol = NULL;
3797 silc_packet_context_free(ctx->packet);
3799 silc_ske_free(ctx->ske);