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);
43 /* Allocates a new SILC server object. This has to be done before the server
44 can be used. After allocation one must call silc_server_init to initialize
45 the server. The new allocated server object is returned to the new_server
48 int silc_server_alloc(SilcServer *new_server)
52 SILC_LOG_DEBUG(("Allocating new server object"));
54 server = silc_calloc(1, sizeof(*server));
55 server->server_type = SILC_SERVER;
56 server->standalone = TRUE;
57 server->local_list = silc_calloc(1, sizeof(*server->local_list));
58 server->global_list = silc_calloc(1, sizeof(*server->global_list));
59 server->pending_commands = silc_dlist_init();
61 server->sim = silc_dlist_init();
69 /* Free's the SILC server object. This is called at the very end before
72 void silc_server_free(SilcServer server)
79 if (server->local_list)
80 silc_free(server->local_list);
81 if (server->global_list)
82 silc_free(server->global_list);
84 silc_rng_free(server->rng);
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
91 silc_dlist_uninit(server->sim);
95 silc_free(server->params);
97 if (server->pending_commands)
98 silc_dlist_uninit(server->pending_commands);
104 /* Initializes the entire SILC server. This is called always before running
105 the server. This is called only once at the initialization of the program.
106 This binds the server to its listenning port. After this function returns
107 one should call silc_server_run to start the server. This returns TRUE
108 when everything is ok to run the server. Configuration file must be
109 read and parsed before calling this. */
111 int silc_server_init(SilcServer server)
113 int *sock = NULL, sock_count = 0, i;
115 SilcServerEntry id_entry;
116 SilcIDListPurge purge;
118 SILC_LOG_DEBUG(("Initializing server"));
120 assert(server->config);
122 /* XXX After server is made as Silc Server Library this can be given
123 as argument, for now this is hard coded */
124 server->params = silc_calloc(1, sizeof(*server->params));
125 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
126 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
127 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
128 server->params->retry_keep_trying = FALSE;
129 server->params->protocol_timeout = 60;
130 server->params->require_reverse_mapping = FALSE;
132 /* Set log files where log message should be saved. */
133 server->config->server = server;
134 silc_server_config_setlogfiles(server->config);
136 /* Register all configured ciphers, PKCS and hash functions. */
137 silc_server_config_register_ciphers(server->config);
138 silc_server_config_register_pkcs(server->config);
139 silc_server_config_register_hashfuncs(server->config);
140 silc_server_config_register_hmacs(server->config);
142 /* Initialize random number generator for the server. */
143 server->rng = silc_rng_alloc();
144 silc_rng_init(server->rng);
145 silc_rng_global_init(server->rng);
147 /* Initialize hash functions for server to use */
148 silc_hash_alloc("md5", &server->md5hash);
149 silc_hash_alloc("sha1", &server->sha1hash);
151 /* Initialize none cipher */
152 silc_cipher_alloc("none", &server->none_cipher);
154 /* XXXXX Generate RSA key pair */
156 unsigned char *public_key;
157 unsigned char *private_key;
158 unsigned int pk_len, prv_len;
161 if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
163 if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
164 SILC_LOG_ERROR(("Could not create RSA key pair"));
168 if (server->pkcs->pkcs->init(server->pkcs->context,
169 1024, server->rng) == FALSE) {
170 SILC_LOG_ERROR(("Could not generate RSA key pair"));
174 public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
176 private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
179 SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
180 SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
183 silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
185 server->private_key =
186 silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
189 silc_pkcs_save_public_key("pubkey.pub", server->public_key,
191 silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
194 memset(public_key, 0, pk_len);
195 memset(private_key, 0, prv_len);
196 silc_free(public_key);
197 silc_free(private_key);
199 silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
201 silc_pkcs_load_private_key("privkey.prv", &server->private_key,
206 /* Create a listening server. Note that our server can listen on
207 multiple ports. All listeners are created here and now. */
208 /* XXX Still check this whether to use server_info or listen_port. */
210 while(server->config->listen_port) {
213 tmp = silc_net_create_server(server->config->listen_port->port,
214 server->config->listen_port->host);
218 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
219 sock[sock_count] = tmp;
220 server->config->listen_port = server->config->listen_port->next;
224 /* Initialize ID caches */
225 server->local_list->clients =
226 silc_idcache_alloc(0, silc_idlist_client_destructor);
227 server->local_list->servers = silc_idcache_alloc(0, NULL);
228 server->local_list->channels = silc_idcache_alloc(0, NULL);
230 /* These are allocated for normal server as well as these hold some
231 global information that the server has fetched from its router. For
232 router these are used as they are supposed to be used on router. */
233 server->global_list->clients =
234 silc_idcache_alloc(0, silc_idlist_client_destructor);
235 server->global_list->servers = silc_idcache_alloc(0, NULL);
236 server->global_list->channels = silc_idcache_alloc(0, NULL);
238 /* Allocate the entire socket list that is used in server. Eventually
239 all connections will have entry in this table (it is a table of
240 pointers to the actual object that is allocated individually
242 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
243 sizeof(*server->sockets));
245 for (i = 0; i < sock_count; i++) {
246 SilcSocketConnection newsocket = NULL;
248 /* Set socket to non-blocking mode */
249 silc_net_set_socket_nonblock(sock[i]);
250 server->sock = sock[i];
252 /* Create a Server ID for the server. */
253 silc_id_create_server_id(sock[i], server->rng, &id);
259 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
260 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
261 server->id_type = SILC_ID_SERVER;
262 server->server_name = server->config->server_info->server_name;
264 /* Add ourselves to the server list. We don't have a router yet
265 beacuse we haven't established a route yet. It will be done later.
266 For now, NULL is sent as router. This allocates new entry to
269 silc_idlist_add_server(server->local_list,
270 server->config->server_info->server_name,
271 server->server_type, server->id, NULL, NULL);
273 SILC_LOG_ERROR(("Could not add ourselves to cache"));
277 /* Add ourselves also to the socket table. The entry allocated above
278 is sent as argument for fast referencing in the future. */
279 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
282 server->sockets[sock[i]] = newsocket;
284 /* Put the allocated socket pointer also to the entry allocated above
285 for fast back-referencing to the socket list. */
286 id_entry->connection = (void *)server->sockets[sock[i]];
287 server->id_entry = id_entry;
290 /* Register the task queues. In SILC we have by default three task queues.
291 One task queue for non-timeout tasks which perform different kind of
292 I/O on file descriptors, timeout task queue for timeout tasks, and,
293 generic non-timeout task queue whose tasks apply to all connections. */
294 silc_task_queue_alloc(&server->io_queue, TRUE);
295 if (!server->io_queue) {
298 silc_task_queue_alloc(&server->timeout_queue, TRUE);
299 if (!server->timeout_queue) {
302 silc_task_queue_alloc(&server->generic_queue, TRUE);
303 if (!server->generic_queue) {
307 /* Register protocols */
308 silc_server_protocols_register();
310 /* Initialize the scheduler */
311 silc_schedule_init(&server->io_queue, &server->timeout_queue,
312 &server->generic_queue,
313 SILC_SERVER_MAX_CONNECTIONS);
315 /* Add the first task to the queue. This is task that is executed by
316 timeout. It expires as soon as the caller calls silc_server_run. This
317 task performs authentication protocol and key exchange with our
319 silc_task_register(server->timeout_queue, sock[0],
320 silc_server_connect_to_router,
321 (void *)server, 0, 1,
323 SILC_TASK_PRI_NORMAL);
325 /* Add listener task to the queue. This task receives new connections to the
326 server. This task remains on the queue until the end of the program. */
327 silc_task_register(server->io_queue, sock[0],
328 silc_server_accept_new_connection,
329 (void *)server, 0, 0,
331 SILC_TASK_PRI_NORMAL);
332 server->listenning = TRUE;
334 /* If server connections has been configured then we must be router as
335 normal server cannot have server connections, only router connections. */
336 if (server->config->servers)
337 server->server_type = SILC_ROUTER;
339 /* Register the ID Cache purge task. This periodically purges the ID cache
340 and removes the expired cache entries. */
342 /* Clients local list */
343 purge = silc_calloc(1, sizeof(*purge));
344 purge->cache = server->local_list->clients;
345 purge->timeout_queue = server->timeout_queue;
346 silc_task_register(purge->timeout_queue, 0,
348 (void *)purge, 600, 0,
349 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
351 /* Clients global list */
352 purge = silc_calloc(1, sizeof(*purge));
353 purge->cache = server->global_list->clients;
354 purge->timeout_queue = server->timeout_queue;
355 silc_task_register(purge->timeout_queue, 0,
357 (void *)purge, 300, 0,
358 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
360 SILC_LOG_DEBUG(("Server initialized"));
362 /* We are done here, return succesfully */
365 silc_task_queue_free(server->timeout_queue);
367 silc_task_queue_free(server->io_queue);
369 for (i = 0; i < sock_count; i++)
370 silc_net_close_server(sock[i]);
375 /* Fork server to background and set gid+uid to non-root.
376 Silcd will not run as root, so trying to set either user or group to
377 root will cause silcd to exit. */
379 void silc_server_daemonise(SilcServer server)
381 /* Are we executing silcd as root or a regular user? */
388 if (!server->config->identity || !server->config->identity->user ||
389 !server->config->identity->group) {
390 fprintf(stderr, "Error:"
391 "\tSILC server must not be run as root. For the security of your\n"
392 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
393 "\tuser account. Modify the [Identity] configuration section to run\n"
394 "\tthe server as non-root user.\n");
398 /* Get the values given for user and group in configuration file */
399 user=server->config->identity->user;
400 group=server->config->identity->group;
402 /* Check whether the user/group information is text */
403 if (atoi(user)!=0 || atoi(group)!=0) {
404 SILC_LOG_DEBUG(("Invalid user and/or group information"));
405 SILC_LOG_DEBUG(("User and/or group given as number"));
406 fprintf(stderr, "Invalid user and/or group information\n");
407 fprintf(stderr, "Please assign them as names, not numbers\n");
411 /* Catch the nasty incident of string "0" returning 0 from atoi */
412 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
413 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
414 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
422 fprintf(stderr, "No such user %s found\n", user);
427 fprintf(stderr, "No such group %s found\n", group);
431 /* Check whether user and/or group is set to root. If yes, exit
432 immediately. Otherwise, setgid and setuid server to user.group */
433 if (gr->gr_gid==0 || pw->pw_uid==0) {
434 fprintf(stderr, "Error:"
435 "\tSILC server must not be run as root. For the security of your\n"
436 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
437 "\tuser account. Modify the [Identity] configuration section to run\n"
438 "\tthe server as non-root user.\n");
441 /* Fork server to background, making it a daemon */
443 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
444 SILC_LOG_DEBUG(("Forking SILC server to background"));
449 SILC_LOG_DEBUG(("Changing to group %s", group));
450 if(setgid(gr->gr_gid)==0) {
451 SILC_LOG_DEBUG(("Setgid to %s", group));
453 SILC_LOG_DEBUG(("Setgid to %s failed", group));
454 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
458 SILC_LOG_DEBUG(("Changing to user nobody"));
459 if(setuid(pw->pw_uid)==0) {
460 SILC_LOG_DEBUG(("Setuid to %s", user));
462 SILC_LOG_DEBUG(("Setuid to %s failed", user));
463 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
469 /* Fork server to background, making it a daemon */
471 SILC_LOG_DEBUG(("Server started as user"));
472 SILC_LOG_DEBUG(("Forking SILC server to background"));
479 /* Stops the SILC server. This function is used to shutdown the server.
480 This is usually called after the scheduler has returned. After stopping
481 the server one should call silc_server_free. */
483 void silc_server_stop(SilcServer server)
485 SILC_LOG_DEBUG(("Stopping server"));
487 /* Stop the scheduler, although it might be already stopped. This
488 doesn't hurt anyone. This removes all the tasks and task queues,
490 silc_schedule_stop();
491 silc_schedule_uninit();
493 silc_server_protocols_unregister();
495 SILC_LOG_DEBUG(("Server stopped"));
498 /* The heart of the server. This runs the scheduler thus runs the server.
499 When this returns the server has been stopped and the program will
502 void silc_server_run(SilcServer server)
504 SILC_LOG_DEBUG(("Running server"));
506 /* Start the scheduler, the heart of the SILC server. When this returns
507 the program will be terminated. */
511 /* Timeout callback that will be called to retry connecting to remote
512 router. This is used by both normal and router server. This will wait
513 before retrying the connecting. The timeout is generated by exponential
514 backoff algorithm. */
516 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
518 SilcServerConnection sconn = (SilcServerConnection)context;
519 SilcServer server = sconn->server;
521 SILC_LOG_INFO(("Retrying connecting to a router"));
523 /* Calculate next timeout */
524 if (sconn->retry_count >= 1) {
525 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
526 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
527 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
529 sconn->retry_timeout = server->params->retry_interval_min;
531 sconn->retry_count++;
532 sconn->retry_timeout = sconn->retry_timeout +
533 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
535 /* If we've reached max retry count, give up. */
536 if (sconn->retry_count > server->params->retry_count &&
537 server->params->retry_keep_trying == FALSE) {
538 SILC_LOG_ERROR(("Could not connect to router, giving up"));
542 /* Wait one before retrying */
543 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
544 context, sconn->retry_timeout,
545 server->params->retry_interval_min_usec,
546 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
549 /* Generic routine to use connect to a router. */
551 SILC_TASK_CALLBACK(silc_server_connect_router)
553 SilcServerConnection sconn = (SilcServerConnection)context;
554 SilcServer server = sconn->server;
555 SilcSocketConnection newsocket;
556 SilcProtocol protocol;
557 SilcServerKEInternalContext *proto_ctx;
560 /* Connect to remote host */
561 sock = silc_net_create_connection(sconn->remote_port,
564 SILC_LOG_ERROR(("Could not connect to router"));
565 silc_task_register(server->timeout_queue, fd,
566 silc_server_connect_to_router_retry,
567 context, 0, 1, SILC_TASK_TIMEOUT,
568 SILC_TASK_PRI_NORMAL);
572 /* Set socket options */
573 silc_net_set_socket_nonblock(sock);
574 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
576 /* Create socket connection for the connection. Even though we
577 know that we are connecting to a router we will mark the socket
578 to be unknown connection until we have executed authentication
580 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
581 server->sockets[sock] = newsocket;
582 newsocket->hostname = strdup(sconn->remote_host);
583 newsocket->ip = strdup(sconn->remote_host);
584 newsocket->port = sconn->remote_port;
585 sconn->sock = newsocket;
587 /* Allocate internal protocol context. This is sent as context
589 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
590 proto_ctx->server = (void *)server;
591 proto_ctx->context = (void *)sconn;
592 proto_ctx->sock = newsocket;
593 proto_ctx->rng = server->rng;
594 proto_ctx->responder = FALSE;
596 /* Perform key exchange protocol. silc_server_connect_to_router_second
597 will be called after the protocol is finished. */
598 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
599 &protocol, proto_ctx,
600 silc_server_connect_to_router_second);
601 newsocket->protocol = protocol;
603 /* Register a timeout task that will be executed if the protocol
604 is not executed within set limit. */
605 proto_ctx->timeout_task =
606 silc_task_register(server->timeout_queue, sock,
607 silc_server_timeout_remote,
608 server, server->params->protocol_timeout,
609 server->params->protocol_timeout_usec,
613 /* Register the connection for network input and output. This sets
614 that scheduler will listen for incoming packets for this connection
615 and sets that outgoing packets may be sent to this connection as
616 well. However, this doesn't set the scheduler for outgoing traffic,
617 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
618 later when outgoing data is available. */
619 context = (void *)server;
620 SILC_REGISTER_CONNECTION_FOR_IO(sock);
622 /* Run the protocol */
623 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
626 /* This function connects to our primary router or if we are a router this
627 establishes all our primary routes. This is called at the start of the
628 server to do authentication and key exchange with our router - called
631 SILC_TASK_CALLBACK(silc_server_connect_to_router)
633 SilcServer server = (SilcServer)context;
634 SilcServerConnection sconn;
636 SILC_LOG_DEBUG(("Connecting to router(s)"));
638 /* If we are normal SILC server we need to connect to our cell's
640 if (server->server_type == SILC_SERVER) {
641 SILC_LOG_DEBUG(("We are normal server"));
643 /* Create connection to the router, if configured. */
644 if (server->config->routers) {
646 /* Allocate connection object for hold connection specific stuff. */
647 sconn = silc_calloc(1, sizeof(*sconn));
648 sconn->server = server;
649 sconn->remote_host = strdup(server->config->routers->host);
650 sconn->remote_port = server->config->routers->port;
652 silc_task_register(server->timeout_queue, fd,
653 silc_server_connect_router,
654 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
655 SILC_TASK_PRI_NORMAL);
660 /* If we are a SILC router we need to establish all of our primary
662 if (server->server_type == SILC_ROUTER) {
663 SilcServerConfigSectionServerConnection *ptr;
665 SILC_LOG_DEBUG(("We are router"));
667 /* Create the connections to all our routes */
668 ptr = server->config->routers;
671 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
672 ptr->initiator ? "Initiator" : "Responder",
673 ptr->host, ptr->port));
675 if (ptr->initiator) {
676 /* Allocate connection object for hold connection specific stuff. */
677 sconn = silc_calloc(1, sizeof(*sconn));
678 sconn->server = server;
679 sconn->remote_host = strdup(ptr->host);
680 sconn->remote_port = ptr->port;
682 silc_task_register(server->timeout_queue, fd,
683 silc_server_connect_router,
684 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
685 SILC_TASK_PRI_NORMAL);
695 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
697 /* There wasn't a configured router, we will continue but we don't
698 have a connection to outside world. We will be standalone server. */
699 server->standalone = TRUE;
702 /* Second part of connecting to router(s). Key exchange protocol has been
703 executed and now we will execute authentication protocol. */
705 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
707 SilcProtocol protocol = (SilcProtocol)context;
708 SilcServerKEInternalContext *ctx =
709 (SilcServerKEInternalContext *)protocol->context;
710 SilcServer server = (SilcServer)ctx->server;
711 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
712 SilcSocketConnection sock = NULL;
713 SilcServerConnAuthInternalContext *proto_ctx;
714 SilcServerConfigSectionServerConnection *conn = NULL;
716 SILC_LOG_DEBUG(("Start"));
718 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
719 /* Error occured during protocol */
720 silc_protocol_free(protocol);
721 silc_ske_free_key_material(ctx->keymat);
723 silc_packet_context_free(ctx->packet);
725 silc_ske_free(ctx->ske);
727 silc_free(ctx->dest_id);
729 silc_task_unregister_by_callback(server->timeout_queue,
730 silc_server_failure_callback);
731 silc_server_disconnect_remote(server, sock, "Server closed connection: "
732 "Key exchange failed");
736 /* We now have the key material as the result of the key exchange
737 protocol. Take the key material into use. Free the raw key material
738 as soon as we've set them into use. */
739 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
740 ctx->ske->prop->cipher,
741 ctx->ske->prop->pkcs,
742 ctx->ske->prop->hash,
743 ctx->ske->prop->hmac,
745 silc_protocol_free(protocol);
746 silc_ske_free_key_material(ctx->keymat);
748 silc_packet_context_free(ctx->packet);
750 silc_ske_free(ctx->ske);
752 silc_free(ctx->dest_id);
754 silc_task_unregister_by_callback(server->timeout_queue,
755 silc_server_failure_callback);
756 silc_server_disconnect_remote(server, sock, "Server closed connection: "
757 "Key exchange failed");
760 silc_ske_free_key_material(ctx->keymat);
762 /* Allocate internal context for the authentication protocol. This
763 is sent as context for the protocol. */
764 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
765 proto_ctx->server = (void *)server;
766 proto_ctx->context = (void *)sconn;
767 proto_ctx->sock = sock = server->sockets[fd];
768 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
769 proto_ctx->dest_id_type = ctx->dest_id_type;
770 proto_ctx->dest_id = ctx->dest_id;
772 /* Resolve the authentication method used in this connection. Check if
773 we find a match from user configured connections */
774 conn = silc_server_config_find_router_conn(server->config,
778 /* Match found. Use the configured authentication method */
779 proto_ctx->auth_meth = conn->auth_meth;
780 if (conn->auth_data) {
781 proto_ctx->auth_data = strdup(conn->auth_data);
782 proto_ctx->auth_data_len = strlen(conn->auth_data);
785 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
786 sock->hostname, sock->ip, sock->port));
787 silc_protocol_free(protocol);
789 silc_packet_context_free(ctx->packet);
791 silc_ske_free(ctx->ske);
793 silc_free(ctx->dest_id);
795 silc_task_unregister_by_callback(server->timeout_queue,
796 silc_server_failure_callback);
797 silc_server_disconnect_remote(server, sock, "Server closed connection: "
798 "Key exchange failed");
802 /* Free old protocol as it is finished now */
803 silc_protocol_free(protocol);
805 silc_packet_context_free(ctx->packet);
807 sock->protocol = NULL;
809 /* Allocate the authentication protocol. This is allocated here
810 but we won't start it yet. We will be receiving party of this
811 protocol thus we will wait that connecting party will make
813 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
814 &sock->protocol, proto_ctx,
815 silc_server_connect_to_router_final);
817 /* Register timeout task. If the protocol is not executed inside
818 this timelimit the connection will be terminated. Currently
819 this is 15 seconds and is hard coded limit (XXX). */
820 proto_ctx->timeout_task =
821 silc_task_register(server->timeout_queue, sock->sock,
822 silc_server_timeout_remote,
823 (void *)server, 15, 0,
827 /* Run the protocol */
828 sock->protocol->execute(server->timeout_queue, 0,
829 sock->protocol, sock->sock, 0, 0);
832 /* Finalizes the connection to router. Registers a server task to the
833 queue so that we can accept new connections. */
835 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
837 SilcProtocol protocol = (SilcProtocol)context;
838 SilcServerConnAuthInternalContext *ctx =
839 (SilcServerConnAuthInternalContext *)protocol->context;
840 SilcServer server = (SilcServer)ctx->server;
841 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
842 SilcSocketConnection sock = ctx->sock;
843 SilcServerEntry id_entry;
845 SilcServerHBContext hb_context;
846 unsigned char *id_string;
848 SILC_LOG_DEBUG(("Start"));
850 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
851 /* Error occured during protocol */
853 silc_free(ctx->dest_id);
854 silc_server_disconnect_remote(server, sock, "Server closed connection: "
855 "Authentication failed");
859 /* Add a task to the queue. This task receives new connections to the
860 server. This task remains on the queue until the end of the program. */
861 if (!server->listenning) {
862 silc_task_register(server->io_queue, server->sock,
863 silc_server_accept_new_connection,
864 (void *)server, 0, 0,
866 SILC_TASK_PRI_NORMAL);
867 server->listenning = TRUE;
870 /* Send NEW_SERVER packet to the router. We will become registered
871 to the SILC network after sending this packet. */
872 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
873 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
874 strlen(server->server_name));
875 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
876 silc_buffer_format(packet,
877 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
878 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
879 SILC_STR_UI_SHORT(strlen(server->server_name)),
880 SILC_STR_UI_XNSTRING(server->server_name,
881 strlen(server->server_name)),
884 /* Send the packet */
885 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
886 packet->data, packet->len, TRUE);
887 silc_buffer_free(packet);
888 silc_free(id_string);
890 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
892 /* Add the connected router to local server list */
893 server->standalone = FALSE;
894 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
895 SILC_ROUTER, ctx->dest_id, NULL, sock);
898 silc_free(ctx->dest_id);
899 silc_server_disconnect_remote(server, sock, "Server closed connection: "
900 "Authentication failed");
904 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
905 silc_free(sock->user_data);
906 sock->user_data = (void *)id_entry;
907 sock->type = SILC_SOCKET_TYPE_ROUTER;
908 server->id_entry->router = id_entry;
909 server->router = id_entry;
910 server->router->data.registered = TRUE;
912 /* Perform keepalive. The `hb_context' will be freed automatically
913 when finally calling the silc_socket_free function. XXX hardcoded
915 hb_context = silc_calloc(1, sizeof(*hb_context));
916 hb_context->server = server;
917 silc_socket_set_heartbeat(sock, 600, hb_context,
918 silc_server_perform_heartbeat,
919 server->timeout_queue);
921 /* If we are router then announce our possible servers. */
922 if (server->server_type == SILC_ROUTER)
923 silc_server_announce_servers(server);
925 /* Announce our clients and channels to the router */
926 silc_server_announce_clients(server);
927 silc_server_announce_channels(server);
930 /* Free the temporary connection data context */
932 silc_free(sconn->remote_host);
936 /* Free the protocol object */
937 silc_protocol_free(protocol);
939 silc_packet_context_free(ctx->packet);
941 silc_ske_free(ctx->ske);
943 sock->protocol = NULL;
946 /* Accepts new connections to the server. Accepting new connections are
947 done in three parts to make it async. */
949 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
951 SilcServer server = (SilcServer)context;
952 SilcSocketConnection newsocket;
953 SilcServerKEInternalContext *proto_ctx;
956 SILC_LOG_DEBUG(("Accepting new connection"));
958 server->stat.conn_attempts++;
960 sock = silc_net_accept_connection(server->sock);
962 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
963 server->stat.conn_failures++;
967 /* Check max connections */
968 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
969 SILC_LOG_ERROR(("Refusing connection, server is full"));
970 server->stat.conn_failures++;
974 /* Set socket options */
975 silc_net_set_socket_nonblock(sock);
976 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
978 /* We don't create a ID yet, since we don't know what type of connection
979 this is yet. But, we do add the connection to the socket table. */
980 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
981 server->sockets[sock] = newsocket;
983 /* XXX This MUST be done async as this will block the entire server
984 process. Either we have to do our own resolver stuff or in the future
985 we can use threads. */
986 /* Perform name and address lookups for the remote host. */
987 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
988 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
990 SILC_LOG_ERROR(("IP/DNS lookup failed"));
991 server->stat.conn_failures++;
994 if (!newsocket->hostname)
995 newsocket->hostname = strdup(newsocket->ip);
996 newsocket->port = silc_net_get_remote_port(sock);
998 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1001 /* Allocate internal context for key exchange protocol. This is
1002 sent as context for the protocol. */
1003 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1004 proto_ctx->server = context;
1005 proto_ctx->sock = newsocket;
1006 proto_ctx->rng = server->rng;
1007 proto_ctx->responder = TRUE;
1009 /* Prepare the connection for key exchange protocol. We allocate the
1010 protocol but will not start it yet. The connector will be the
1011 initiator of the protocol thus we will wait for initiation from
1012 there before we start the protocol. */
1013 server->stat.auth_attempts++;
1014 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1015 &newsocket->protocol, proto_ctx,
1016 silc_server_accept_new_connection_second);
1018 /* Register a timeout task that will be executed if the connector
1019 will not start the key exchange protocol within 60 seconds. For
1020 now, this is a hard coded limit. After 60 secs the connection will
1021 be closed if the key exchange protocol has not been started. */
1022 proto_ctx->timeout_task =
1023 silc_task_register(server->timeout_queue, newsocket->sock,
1024 silc_server_timeout_remote,
1029 /* Register the connection for network input and output. This sets
1030 that scheduler will listen for incoming packets for this connection
1031 and sets that outgoing packets may be sent to this connection as well.
1032 However, this doesn't set the scheduler for outgoing traffic, it
1033 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1034 later when outgoing data is available. */
1035 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1038 /* Second part of accepting new connection. Key exchange protocol has been
1039 performed and now it is time to do little connection authentication
1040 protocol to figure out whether this connection is client or server
1041 and whether it has right to access this server (especially server
1042 connections needs to be authenticated). */
1044 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1046 SilcProtocol protocol = (SilcProtocol)context;
1047 SilcServerKEInternalContext *ctx =
1048 (SilcServerKEInternalContext *)protocol->context;
1049 SilcServer server = (SilcServer)ctx->server;
1050 SilcSocketConnection sock = NULL;
1051 SilcServerConnAuthInternalContext *proto_ctx;
1053 SILC_LOG_DEBUG(("Start"));
1055 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1056 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1057 /* Error occured during protocol */
1058 silc_protocol_free(protocol);
1059 silc_ske_free_key_material(ctx->keymat);
1061 silc_packet_context_free(ctx->packet);
1063 silc_ske_free(ctx->ske);
1065 silc_free(ctx->dest_id);
1067 silc_task_unregister_by_callback(server->timeout_queue,
1068 silc_server_failure_callback);
1069 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1070 "Key exchange failed");
1071 server->stat.auth_failures++;
1075 /* We now have the key material as the result of the key exchange
1076 protocol. Take the key material into use. Free the raw key material
1077 as soon as we've set them into use. */
1078 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1079 ctx->ske->prop->cipher,
1080 ctx->ske->prop->pkcs,
1081 ctx->ske->prop->hash,
1082 ctx->ske->prop->hmac,
1084 silc_protocol_free(protocol);
1085 silc_ske_free_key_material(ctx->keymat);
1087 silc_packet_context_free(ctx->packet);
1089 silc_ske_free(ctx->ske);
1091 silc_free(ctx->dest_id);
1093 silc_task_unregister_by_callback(server->timeout_queue,
1094 silc_server_failure_callback);
1095 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1096 "Key exchange failed");
1097 server->stat.auth_failures++;
1100 silc_ske_free_key_material(ctx->keymat);
1102 /* Allocate internal context for the authentication protocol. This
1103 is sent as context for the protocol. */
1104 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1105 proto_ctx->server = (void *)server;
1106 proto_ctx->sock = sock = server->sockets[fd];
1107 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1108 proto_ctx->responder = TRUE;
1109 proto_ctx->dest_id_type = ctx->dest_id_type;
1110 proto_ctx->dest_id = ctx->dest_id;
1112 /* Free old protocol as it is finished now */
1113 silc_protocol_free(protocol);
1115 silc_packet_context_free(ctx->packet);
1117 sock->protocol = NULL;
1119 /* Allocate the authentication protocol. This is allocated here
1120 but we won't start it yet. We will be receiving party of this
1121 protocol thus we will wait that connecting party will make
1122 their first move. */
1123 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1124 &sock->protocol, proto_ctx,
1125 silc_server_accept_new_connection_final);
1127 /* Register timeout task. If the protocol is not executed inside
1128 this timelimit the connection will be terminated. Currently
1129 this is 60 seconds and is hard coded limit (XXX). */
1130 proto_ctx->timeout_task =
1131 silc_task_register(server->timeout_queue, sock->sock,
1132 silc_server_timeout_remote,
1133 (void *)server, 60, 0,
1138 /* Final part of accepting new connection. The connection has now
1139 been authenticated and keys has been exchanged. We also know whether
1140 this is client or server connection. */
1142 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1144 SilcProtocol protocol = (SilcProtocol)context;
1145 SilcServerConnAuthInternalContext *ctx =
1146 (SilcServerConnAuthInternalContext *)protocol->context;
1147 SilcServer server = (SilcServer)ctx->server;
1148 SilcSocketConnection sock = ctx->sock;
1149 SilcServerHBContext hb_context;
1150 void *id_entry = NULL;
1152 SILC_LOG_DEBUG(("Start"));
1154 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1155 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1156 /* Error occured during protocol */
1157 silc_protocol_free(protocol);
1159 silc_packet_context_free(ctx->packet);
1161 silc_ske_free(ctx->ske);
1163 silc_free(ctx->dest_id);
1166 sock->protocol = NULL;
1167 silc_task_unregister_by_callback(server->timeout_queue,
1168 silc_server_failure_callback);
1169 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1170 "Authentication failed");
1171 server->stat.auth_failures++;
1175 sock->type = ctx->conn_type;
1176 switch(sock->type) {
1177 case SILC_SOCKET_TYPE_CLIENT:
1179 SilcClientEntry client;
1181 SILC_LOG_DEBUG(("Remote host is client"));
1182 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1185 /* Add the client to the client ID cache. The nickname and Client ID
1186 and other information is created after we have received NEW_CLIENT
1187 packet from client. */
1188 client = silc_idlist_add_client(server->local_list,
1189 NULL, 0, NULL, NULL, NULL, NULL, sock);
1191 SILC_LOG_ERROR(("Could not add new client to cache"));
1192 silc_free(sock->user_data);
1197 server->stat.my_clients++;
1198 server->stat.clients++;
1199 if (server->server_type == SILC_ROUTER)
1200 server->stat.cell_clients++;
1202 id_entry = (void *)client;
1205 case SILC_SOCKET_TYPE_SERVER:
1206 case SILC_SOCKET_TYPE_ROUTER:
1208 SilcServerEntry new_server;
1210 SILC_LOG_DEBUG(("Remote host is %s",
1211 sock->type == SILC_SOCKET_TYPE_SERVER ?
1212 "server" : "router"));
1213 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1214 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1215 "server" : "router"));
1217 /* Add the server into server cache. The server name and Server ID
1218 is updated after we have received NEW_SERVER packet from the
1219 server. We mark ourselves as router for this server if we really
1222 silc_idlist_add_server(server->local_list, NULL,
1223 sock->type == SILC_SOCKET_TYPE_SERVER ?
1224 SILC_SERVER : SILC_ROUTER, NULL,
1225 sock->type == SILC_SOCKET_TYPE_SERVER ?
1226 server->id_entry : NULL, sock);
1228 SILC_LOG_ERROR(("Could not add new server to cache"));
1229 silc_free(sock->user_data);
1234 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1235 server->stat.my_servers++;
1237 server->stat.my_routers++;
1238 server->stat.servers++;
1240 id_entry = (void *)new_server;
1242 /* There is connection to other server now, if it is router then
1243 we will have connection to outside world. If we are router but
1244 normal server connected to us then we will remain standalone,
1245 if we are standlone. */
1246 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1247 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1248 server->standalone = FALSE;
1249 if (!server->id_entry->router) {
1250 server->id_entry->router = id_entry;
1251 server->router = id_entry;
1260 /* Add the common data structure to the ID entry. */
1262 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1264 /* Add to sockets internal pointer for fast referencing */
1265 silc_free(sock->user_data);
1266 sock->user_data = id_entry;
1268 /* Connection has been fully established now. Everything is ok. */
1269 SILC_LOG_DEBUG(("New connection authenticated"));
1271 /* Perform keepalive. The `hb_context' will be freed automatically
1272 when finally calling the silc_socket_free function. XXX hardcoded
1274 hb_context = silc_calloc(1, sizeof(*hb_context));
1275 hb_context->server = server;
1276 silc_socket_set_heartbeat(sock, 600, hb_context,
1277 silc_server_perform_heartbeat,
1278 server->timeout_queue);
1280 silc_task_unregister_by_callback(server->timeout_queue,
1281 silc_server_failure_callback);
1282 silc_protocol_free(protocol);
1284 silc_packet_context_free(ctx->packet);
1286 silc_ske_free(ctx->ske);
1288 silc_free(ctx->dest_id);
1290 sock->protocol = NULL;
1293 /* This function is used to read packets from network and send packets to
1294 network. This is usually a generic task. */
1296 SILC_TASK_CALLBACK(silc_server_packet_process)
1298 SilcServer server = (SilcServer)context;
1299 SilcSocketConnection sock = server->sockets[fd];
1300 SilcIDListData idata;
1301 SilcCipher cipher = NULL;
1302 SilcHmac hmac = NULL;
1308 SILC_LOG_DEBUG(("Processing packet"));
1310 /* Packet sending */
1312 if (type == SILC_TASK_WRITE) {
1313 /* Do not send data to disconnected connection */
1314 if (SILC_IS_DISCONNECTED(sock))
1317 server->stat.packets_sent++;
1319 if (sock->outbuf->data - sock->outbuf->head)
1320 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1322 ret = silc_server_packet_send_real(server, sock, TRUE);
1324 /* If returned -2 could not write to connection now, will do
1332 /* The packet has been sent and now it is time to set the connection
1333 back to only for input. When there is again some outgoing data
1334 available for this connection it will be set for output as well.
1335 This call clears the output setting and sets it only for input. */
1336 SILC_SET_CONNECTION_FOR_INPUT(fd);
1337 SILC_UNSET_OUTBUF_PENDING(sock);
1339 silc_buffer_clear(sock->outbuf);
1343 /* Packet receiving */
1345 /* Read some data from connection */
1346 ret = silc_packet_receive(sock);
1352 SILC_LOG_DEBUG(("Read EOF"));
1354 /* If connection is disconnecting already we will finally
1355 close the connection */
1356 if (SILC_IS_DISCONNECTING(sock)) {
1357 if (sock->user_data)
1358 silc_server_free_sock_user_data(server, sock);
1359 silc_server_close_connection(server, sock);
1363 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1364 SILC_SET_DISCONNECTING(sock);
1366 /* If the closed connection was our primary router connection the
1367 start re-connecting phase. */
1368 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1369 sock == server->router->connection)
1370 silc_task_register(server->timeout_queue, 0,
1371 silc_server_connect_to_router,
1374 SILC_TASK_PRI_NORMAL);
1376 if (sock->user_data)
1377 silc_server_free_sock_user_data(server, sock);
1378 silc_server_close_connection(server, sock);
1382 /* If connection is disconnecting or disconnected we will ignore
1384 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1385 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1389 server->stat.packets_received++;
1391 /* Get keys and stuff from ID entry */
1392 idata = (SilcIDListData)sock->user_data;
1394 idata->last_receive = time(NULL);
1395 cipher = idata->receive_key;
1399 /* Process the packet. This will call the parser that will then
1400 decrypt and parse the packet. */
1401 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1405 /* Callback function that the silc_packet_decrypt will call to make the
1406 decision whether the packet is normal or special packet. We will
1407 return TRUE if it is normal and FALSE if it is special */
1409 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1411 SilcPacketContext *packet,
1414 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1415 SilcServer server = (SilcServer)parse_ctx->context;
1417 /* Packet is normal packet, if:
1419 1) packet is private message packet and does not have private key set
1420 2) is other packet than channel message packet
1421 3) is channel message packet and remote is router and we are router
1423 all other packets are special packets
1426 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1427 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1430 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1431 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1432 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1433 server->server_type == SILC_ROUTER))
1439 /* Parses whole packet, received earlier. */
1441 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1443 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1444 SilcServer server = (SilcServer)parse_ctx->context;
1445 SilcSocketConnection sock = parse_ctx->sock;
1446 SilcPacketContext *packet = parse_ctx->packet;
1449 SILC_LOG_DEBUG(("Start"));
1451 /* Decrypt the received packet */
1452 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1453 packet->buffer, packet,
1454 silc_server_packet_decrypt_check, parse_ctx);
1459 /* Parse the packet. Packet type is returned. */
1460 ret = silc_packet_parse(packet);
1462 /* Parse the packet header in special way as this is "special"
1464 ret = silc_packet_parse_special(packet);
1467 if (ret == SILC_PACKET_NONE)
1470 /* Check that the the current client ID is same as in the client's packet. */
1471 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1472 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1473 if (client && client->id) {
1474 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1475 packet->src_id_type);
1476 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1484 if (server->server_type == SILC_ROUTER) {
1485 /* Route the packet if it is not destined to us. Other ID types but
1486 server are handled separately after processing them. */
1487 if (packet->dst_id_type == SILC_ID_SERVER &&
1488 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1489 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1491 /* Route the packet to fastest route for the destination ID */
1492 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1493 packet->dst_id_type);
1496 silc_server_packet_route(server,
1497 silc_server_route_get(server, id,
1498 packet->dst_id_type),
1504 /* Broadcast packet if it is marked as broadcast packet and it is
1505 originated from router and we are router. */
1506 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1507 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1508 silc_server_packet_broadcast(server, server->router->connection, packet);
1512 /* Parse the incoming packet type */
1513 silc_server_packet_parse_type(server, sock, packet);
1516 silc_buffer_clear(sock->inbuf);
1517 silc_packet_context_free(packet);
1518 silc_free(parse_ctx);
1521 /* Parser callback called by silc_packet_receive_process. This merely
1522 registers timeout that will handle the actual parsing when appropriate. */
1524 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1526 SilcServer server = (SilcServer)parser_context->context;
1527 SilcSocketConnection sock = parser_context->sock;
1529 switch (sock->type) {
1530 case SILC_SOCKET_TYPE_CLIENT:
1531 case SILC_SOCKET_TYPE_UNKNOWN:
1532 /* Parse the packet with timeout */
1533 silc_task_register(server->timeout_queue, sock->sock,
1534 silc_server_packet_parse_real,
1535 (void *)parser_context, 0, 100000,
1537 SILC_TASK_PRI_NORMAL);
1539 case SILC_SOCKET_TYPE_SERVER:
1540 case SILC_SOCKET_TYPE_ROUTER:
1541 /* Packets from servers are parsed as soon as possible */
1542 silc_task_register(server->timeout_queue, sock->sock,
1543 silc_server_packet_parse_real,
1544 (void *)parser_context, 0, 1,
1546 SILC_TASK_PRI_NORMAL);
1553 /* Parses the packet type and calls what ever routines the packet type
1554 requires. This is done for all incoming packets. */
1556 void silc_server_packet_parse_type(SilcServer server,
1557 SilcSocketConnection sock,
1558 SilcPacketContext *packet)
1560 SilcPacketType type = packet->type;
1562 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1564 /* Parse the packet type */
1566 case SILC_PACKET_DISCONNECT:
1567 SILC_LOG_DEBUG(("Disconnect packet"));
1568 if (packet->flags & SILC_PACKET_FLAG_LIST)
1572 case SILC_PACKET_SUCCESS:
1574 * Success received for something. For now we can have only
1575 * one protocol for connection executing at once hence this
1576 * success message is for whatever protocol is executing currently.
1578 SILC_LOG_DEBUG(("Success packet"));
1579 if (packet->flags & SILC_PACKET_FLAG_LIST)
1581 if (sock->protocol) {
1582 sock->protocol->execute(server->timeout_queue, 0,
1583 sock->protocol, sock->sock, 0, 0);
1587 case SILC_PACKET_FAILURE:
1589 * Failure received for something. For now we can have only
1590 * one protocol for connection executing at once hence this
1591 * failure message is for whatever protocol is executing currently.
1593 SILC_LOG_DEBUG(("Failure packet"));
1594 if (packet->flags & SILC_PACKET_FLAG_LIST)
1596 if (sock->protocol) {
1597 SilcServerFailureContext f;
1598 f = silc_calloc(1, sizeof(*f));
1602 /* We will wait 5 seconds to process this failure packet */
1603 silc_task_register(server->timeout_queue, sock->sock,
1604 silc_server_failure_callback, (void *)f, 5, 0,
1605 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1609 case SILC_PACKET_REJECT:
1610 SILC_LOG_DEBUG(("Reject packet"));
1611 if (packet->flags & SILC_PACKET_FLAG_LIST)
1616 case SILC_PACKET_NOTIFY:
1618 * Received notify packet. Server can receive notify packets from
1619 * router. Server then relays the notify messages to clients if needed.
1621 SILC_LOG_DEBUG(("Notify packet"));
1622 if (packet->flags & SILC_PACKET_FLAG_LIST)
1623 silc_server_notify_list(server, sock, packet);
1625 silc_server_notify(server, sock, packet);
1631 case SILC_PACKET_CHANNEL_MESSAGE:
1633 * Received channel message. Channel messages are special packets
1634 * (although probably most common ones) thus they are handled
1637 SILC_LOG_DEBUG(("Channel Message packet"));
1638 if (packet->flags & SILC_PACKET_FLAG_LIST)
1640 silc_server_channel_message(server, sock, packet);
1643 case SILC_PACKET_CHANNEL_KEY:
1645 * Received key for channel. As channels are created by the router
1646 * the keys are as well. We will distribute the key to all of our
1647 * locally connected clients on the particular channel. Router
1648 * never receives this channel and thus is ignored.
1650 SILC_LOG_DEBUG(("Channel Key packet"));
1651 if (packet->flags & SILC_PACKET_FLAG_LIST)
1653 silc_server_channel_key(server, sock, packet);
1659 case SILC_PACKET_COMMAND:
1661 * Recived command. Processes the command request and allocates the
1662 * command context and calls the command.
1664 SILC_LOG_DEBUG(("Command packet"));
1665 if (packet->flags & SILC_PACKET_FLAG_LIST)
1667 silc_server_command_process(server, sock, packet);
1670 case SILC_PACKET_COMMAND_REPLY:
1672 * Received command reply packet. Received command reply to command. It
1673 * may be reply to command sent by us or reply to command sent by client
1674 * that we've routed further.
1676 SILC_LOG_DEBUG(("Command Reply packet"));
1677 if (packet->flags & SILC_PACKET_FLAG_LIST)
1679 silc_server_command_reply(server, sock, packet);
1683 * Private Message packets
1685 case SILC_PACKET_PRIVATE_MESSAGE:
1687 * Received private message packet. The packet is coming from either
1690 SILC_LOG_DEBUG(("Private Message packet"));
1691 if (packet->flags & SILC_PACKET_FLAG_LIST)
1693 silc_server_private_message(server, sock, packet);
1696 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1698 * Private message key packet.
1700 if (packet->flags & SILC_PACKET_FLAG_LIST)
1702 silc_server_private_message_key(server, sock, packet);
1706 * Key Exchange protocol packets
1708 case SILC_PACKET_KEY_EXCHANGE:
1709 SILC_LOG_DEBUG(("KE packet"));
1710 if (packet->flags & SILC_PACKET_FLAG_LIST)
1713 if (sock->protocol && sock->protocol->protocol->type
1714 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1716 SilcServerKEInternalContext *proto_ctx =
1717 (SilcServerKEInternalContext *)sock->protocol->context;
1719 proto_ctx->packet = silc_packet_context_dup(packet);
1721 /* Let the protocol handle the packet */
1722 sock->protocol->execute(server->timeout_queue, 0,
1723 sock->protocol, sock->sock, 0, 100000);
1725 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1726 "protocol active, packet dropped."));
1728 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1732 case SILC_PACKET_KEY_EXCHANGE_1:
1733 SILC_LOG_DEBUG(("KE 1 packet"));
1734 if (packet->flags & SILC_PACKET_FLAG_LIST)
1737 if (sock->protocol && sock->protocol->protocol->type
1738 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1740 SilcServerKEInternalContext *proto_ctx =
1741 (SilcServerKEInternalContext *)sock->protocol->context;
1743 if (proto_ctx->packet)
1744 silc_packet_context_free(proto_ctx->packet);
1746 proto_ctx->packet = silc_packet_context_dup(packet);
1747 proto_ctx->dest_id_type = packet->src_id_type;
1748 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1749 packet->src_id_type);
1750 if (!proto_ctx->dest_id)
1753 /* Let the protocol handle the packet */
1754 sock->protocol->execute(server->timeout_queue, 0,
1755 sock->protocol, sock->sock,
1758 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1759 "protocol active, packet dropped."));
1763 case SILC_PACKET_KEY_EXCHANGE_2:
1764 SILC_LOG_DEBUG(("KE 2 packet"));
1765 if (packet->flags & SILC_PACKET_FLAG_LIST)
1768 if (sock->protocol && sock->protocol->protocol->type
1769 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1771 SilcServerKEInternalContext *proto_ctx =
1772 (SilcServerKEInternalContext *)sock->protocol->context;
1774 if (proto_ctx->packet)
1775 silc_packet_context_free(proto_ctx->packet);
1777 proto_ctx->packet = silc_packet_context_dup(packet);
1778 proto_ctx->dest_id_type = packet->src_id_type;
1779 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1780 packet->src_id_type);
1781 if (!proto_ctx->dest_id)
1784 /* Let the protocol handle the packet */
1785 sock->protocol->execute(server->timeout_queue, 0,
1786 sock->protocol, sock->sock,
1789 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1790 "protocol active, packet dropped."));
1794 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1796 * Connection authentication request packet. When we receive this packet
1797 * we will send to the other end information about our mandatory
1798 * authentication method for the connection. This packet maybe received
1801 SILC_LOG_DEBUG(("Connection authentication request packet"));
1802 if (packet->flags & SILC_PACKET_FLAG_LIST)
1804 silc_server_connection_auth_request(server, sock, packet);
1808 * Connection Authentication protocol packets
1810 case SILC_PACKET_CONNECTION_AUTH:
1811 /* Start of the authentication protocol. We receive here the
1812 authentication data and will verify it. */
1813 SILC_LOG_DEBUG(("Connection auth packet"));
1814 if (packet->flags & SILC_PACKET_FLAG_LIST)
1817 if (sock->protocol && sock->protocol->protocol->type
1818 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1820 SilcServerConnAuthInternalContext *proto_ctx =
1821 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1823 proto_ctx->packet = silc_packet_context_dup(packet);
1825 /* Let the protocol handle the packet */
1826 sock->protocol->execute(server->timeout_queue, 0,
1827 sock->protocol, sock->sock, 0, 0);
1829 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1830 "protocol active, packet dropped."));
1834 case SILC_PACKET_NEW_ID:
1836 * Received New ID packet. This includes some new ID that has been
1837 * created. It may be for client, server or channel. This is the way
1838 * to distribute information about new registered entities in the
1841 SILC_LOG_DEBUG(("New ID packet"));
1842 if (packet->flags & SILC_PACKET_FLAG_LIST)
1843 silc_server_new_id_list(server, sock, packet);
1845 silc_server_new_id(server, sock, packet);
1848 case SILC_PACKET_NEW_CLIENT:
1850 * Received new client packet. This includes client information that
1851 * we will use to create initial client ID. After creating new
1852 * ID we will send it to the client.
1854 SILC_LOG_DEBUG(("New Client packet"));
1855 if (packet->flags & SILC_PACKET_FLAG_LIST)
1857 silc_server_new_client(server, sock, packet);
1860 case SILC_PACKET_NEW_SERVER:
1862 * Received new server packet. This includes Server ID and some other
1863 * information that we may save. This is received after server has
1866 SILC_LOG_DEBUG(("New Server packet"));
1867 if (packet->flags & SILC_PACKET_FLAG_LIST)
1869 silc_server_new_server(server, sock, packet);
1872 case SILC_PACKET_NEW_CHANNEL:
1874 * Received new channel packet. Information about new channel in the
1875 * network are distributed using this packet.
1877 SILC_LOG_DEBUG(("New Channel packet"));
1878 if (packet->flags & SILC_PACKET_FLAG_LIST)
1879 silc_server_new_channel_list(server, sock, packet);
1881 silc_server_new_channel(server, sock, packet);
1884 case SILC_PACKET_HEARTBEAT:
1886 * Received heartbeat.
1888 SILC_LOG_DEBUG(("Heartbeat packet"));
1889 if (packet->flags & SILC_PACKET_FLAG_LIST)
1893 case SILC_PACKET_KEY_AGREEMENT:
1895 * Received heartbeat.
1897 SILC_LOG_DEBUG(("Key agreement packet"));
1898 if (packet->flags & SILC_PACKET_FLAG_LIST)
1900 silc_server_key_agreement(server, sock, packet);
1904 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1910 /* Creates connection to a remote router. */
1912 void silc_server_create_connection(SilcServer server,
1913 char *remote_host, unsigned int port)
1915 SilcServerConnection sconn;
1917 /* Allocate connection object for hold connection specific stuff. */
1918 sconn = silc_calloc(1, sizeof(*sconn));
1919 sconn->server = server;
1920 sconn->remote_host = strdup(remote_host);
1921 sconn->remote_port = port;
1923 silc_task_register(server->timeout_queue, 0,
1924 silc_server_connect_router,
1925 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1926 SILC_TASK_PRI_NORMAL);
1929 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1931 silc_socket_free((SilcSocketConnection)context);
1934 /* Closes connection to socket connection */
1936 void silc_server_close_connection(SilcServer server,
1937 SilcSocketConnection sock)
1939 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1941 /* We won't listen for this connection anymore */
1942 silc_schedule_unset_listen_fd(sock->sock);
1944 /* Unregister all tasks */
1945 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1946 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1948 /* Close the actual connection */
1949 silc_net_close_connection(sock->sock);
1950 server->sockets[sock->sock] = NULL;
1952 silc_task_register(server->timeout_queue, 0,
1953 silc_server_close_connection_final,
1954 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
1955 SILC_TASK_PRI_NORMAL);
1958 /* Sends disconnect message to remote connection and disconnects the
1961 void silc_server_disconnect_remote(SilcServer server,
1962 SilcSocketConnection sock,
1963 const char *fmt, ...)
1966 unsigned char buf[4096];
1971 memset(buf, 0, sizeof(buf));
1973 vsprintf(buf, fmt, ap);
1976 SILC_LOG_DEBUG(("Disconnecting remote host"));
1978 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
1980 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1981 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1982 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1985 /* Notify remote end that the conversation is over. The notify message
1986 is tried to be sent immediately. */
1987 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1988 buf, strlen(buf), TRUE);
1990 /* Mark the connection to be disconnected */
1991 SILC_SET_DISCONNECTED(sock);
1992 silc_server_close_connection(server, sock);
1997 SilcClientEntry client;
1998 } *FreeClientInternal;
2000 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2002 FreeClientInternal i = (FreeClientInternal)context;
2004 silc_idlist_del_data(i->client);
2005 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2009 /* Frees client data and notifies about client's signoff. */
2011 void silc_server_free_client_data(SilcServer server,
2012 SilcSocketConnection sock,
2013 SilcClientEntry client,
2017 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2019 /* If there is pending outgoing data for the client then purge it
2020 to the network before removing the client entry. */
2021 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2022 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2023 server->stat.packets_sent++;
2025 if (sock->outbuf->data - sock->outbuf->head)
2026 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2028 silc_server_packet_send_real(server, sock, TRUE);
2030 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2031 SILC_UNSET_OUTBUF_PENDING(sock);
2032 silc_buffer_clear(sock->outbuf);
2035 /* Send SIGNOFF notify to routers. */
2036 if (notify && !server->standalone && server->router)
2037 silc_server_send_notify_signoff(server, server->router->connection,
2038 server->server_type == SILC_SERVER ?
2039 FALSE : TRUE, client->id,
2040 SILC_ID_CLIENT_LEN, signoff);
2042 /* Remove client from all channels */
2044 silc_server_remove_from_channels(server, NULL, client,
2045 TRUE, signoff, TRUE);
2047 silc_server_remove_from_channels(server, NULL, client,
2048 FALSE, NULL, FALSE);
2050 /* We will not delete the client entry right away. We will take it
2051 into history (for WHOWAS command) for 5 minutes */
2054 silc_task_register(server->timeout_queue, 0,
2055 silc_server_free_client_data_timeout,
2057 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2058 client->data.registered = FALSE;
2060 /* Free the client entry and everything in it */
2061 server->stat.my_clients--;
2062 server->stat.clients--;
2063 if (server->server_type == SILC_ROUTER)
2064 server->stat.cell_clients--;
2067 /* Frees user_data pointer from socket connection object. This also sends
2068 appropriate notify packets to the network to inform about leaving
2071 void silc_server_free_sock_user_data(SilcServer server,
2072 SilcSocketConnection sock)
2074 SILC_LOG_DEBUG(("Start"));
2076 switch(sock->type) {
2077 case SILC_SOCKET_TYPE_CLIENT:
2079 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2080 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2083 case SILC_SOCKET_TYPE_SERVER:
2084 case SILC_SOCKET_TYPE_ROUTER:
2086 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2088 /* Send REMOVE_ID packet to routers. */
2089 if (!server->standalone && server->router)
2090 silc_server_send_notify_server_signoff(server,
2091 server->router->connection,
2092 server->server_type ==
2094 FALSE : TRUE, user_data->id,
2095 SILC_ID_SERVER_LEN);
2097 /* Then also free all client entries that this server owns as
2098 they will become invalid now as well. */
2099 silc_server_remove_clients_by_server(server, user_data);
2101 /* If this was our primary router connection then we're lost to
2102 the outside world. */
2103 if (server->router == user_data) {
2104 server->id_entry->router = NULL;
2105 server->router = NULL;
2106 server->standalone = TRUE;
2109 /* Free the server entry */
2110 silc_idlist_del_data(user_data);
2111 silc_idlist_del_server(server->local_list, user_data);
2112 server->stat.my_servers--;
2113 server->stat.servers--;
2114 if (server->server_type == SILC_ROUTER)
2115 server->stat.cell_servers--;
2120 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2122 silc_idlist_del_data(user_data);
2123 silc_free(user_data);
2128 sock->user_data = NULL;
2131 /* This function is used to remove all client entries by the server `entry'.
2132 This is called when the connection is lost to the server. In this case
2133 we must invalidate all the client entries owned by the server `entry'. */
2135 int silc_server_remove_clients_by_server(SilcServer server,
2136 SilcServerEntry entry)
2138 SilcIDCacheList list = NULL;
2139 SilcIDCacheEntry id_cache = NULL;
2140 SilcClientEntry client = NULL;
2142 SILC_LOG_DEBUG(("Start"));
2144 if (silc_idcache_find_by_id(server->local_list->clients,
2145 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2147 if (silc_idcache_list_first(list, &id_cache)) {
2149 client = (SilcClientEntry)id_cache->context;
2151 if (client->router != entry) {
2152 if (!silc_idcache_list_next(list, &id_cache))
2158 /* Remove the client entry */
2159 silc_server_remove_from_channels(server, NULL, client, TRUE,
2161 silc_idlist_del_client(server->local_list, client);
2163 if (!silc_idcache_list_next(list, &id_cache))
2167 silc_idcache_list_free(list);
2170 if (silc_idcache_find_by_id(server->global_list->clients,
2171 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2173 if (silc_idcache_list_first(list, &id_cache)) {
2175 client = (SilcClientEntry)id_cache->context;
2177 if (client->router != entry) {
2178 if (!silc_idcache_list_next(list, &id_cache))
2184 /* Remove the client entry */
2185 silc_server_remove_from_channels(server, NULL, client, TRUE,
2187 silc_idlist_del_client(server->global_list, client);
2189 if (!silc_idcache_list_next(list, &id_cache))
2193 silc_idcache_list_free(list);
2199 /* Checks whether given channel has global users. If it does this returns
2200 TRUE and FALSE if there is only locally connected clients on the channel. */
2202 int silc_server_channel_has_global(SilcChannelEntry channel)
2204 SilcChannelClientEntry chl;
2206 silc_list_start(channel->user_list);
2207 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2208 if (chl->client->router)
2215 /* Checks whether given channel has locally connected users. If it does this
2216 returns TRUE and FALSE if there is not one locally connected client. */
2218 int silc_server_channel_has_local(SilcChannelEntry channel)
2220 SilcChannelClientEntry chl;
2222 silc_list_start(channel->user_list);
2223 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2224 if (!chl->client->router)
2231 /* Removes client from all channels it has joined. This is used when client
2232 connection is disconnected. If the client on a channel is last, the
2233 channel is removed as well. This sends the SIGNOFF notify types. */
2235 void silc_server_remove_from_channels(SilcServer server,
2236 SilcSocketConnection sock,
2237 SilcClientEntry client,
2239 char *signoff_message,
2242 SilcChannelEntry channel;
2243 SilcChannelClientEntry chl;
2246 SILC_LOG_DEBUG(("Start"));
2248 if (!client || !client->id)
2251 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2253 /* Remove the client from all channels. The client is removed from
2254 the channels' user list. */
2255 silc_list_start(client->channels);
2256 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2257 channel = chl->channel;
2259 /* Remove channel from client's channel list */
2260 silc_list_del(client->channels, chl);
2262 /* Remove channel if there is no users anymore */
2263 if (server->server_type == SILC_ROUTER &&
2264 silc_list_count(channel->user_list) < 2) {
2265 if (!silc_idlist_del_channel(server->local_list, channel))
2266 silc_idlist_del_channel(server->global_list, channel);
2267 server->stat.my_channels--;
2271 /* Remove client from channel's client list */
2272 silc_list_del(channel->user_list, chl);
2274 server->stat.my_chanclients--;
2276 /* If there is no global users on the channel anymore mark the channel
2277 as local channel. */
2278 if (server->server_type == SILC_SERVER &&
2279 !silc_server_channel_has_global(channel))
2280 channel->global_users = FALSE;
2282 /* If there is not at least one local user on the channel then we don't
2283 need the channel entry anymore, we can remove it safely. */
2284 if (server->server_type == SILC_SERVER &&
2285 !silc_server_channel_has_local(channel)) {
2286 /* Notify about leaving client if this channel has global users. */
2287 if (notify && channel->global_users)
2288 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2289 SILC_NOTIFY_TYPE_SIGNOFF,
2290 signoff_message ? 2 : 1,
2291 clidp->data, clidp->len,
2292 signoff_message, signoff_message ?
2293 strlen(signoff_message) : 0);
2295 if (!silc_idlist_del_channel(server->local_list, channel))
2296 silc_idlist_del_channel(server->global_list, channel);
2297 server->stat.my_channels--;
2301 /* Send notify to channel about client leaving SILC and thus
2302 the entire channel. */
2304 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2305 SILC_NOTIFY_TYPE_SIGNOFF,
2306 signoff_message ? 2 : 1,
2307 clidp->data, clidp->len,
2308 signoff_message, signoff_message ?
2309 strlen(signoff_message) : 0);
2311 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2312 /* Re-generate channel key */
2313 silc_server_create_channel_key(server, channel, 0);
2315 /* Send the channel key to the channel. The key of course is not sent
2316 to the client who was removed f rom the channel. */
2317 silc_server_send_channel_key(server, client->connection, channel,
2318 server->server_type == SILC_ROUTER ?
2319 FALSE : !server->standalone);
2323 silc_buffer_free(clidp);
2326 /* Removes client from one channel. This is used for example when client
2327 calls LEAVE command to remove itself from the channel. Returns TRUE
2328 if channel still exists and FALSE if the channel is removed when
2329 last client leaves the channel. If `notify' is FALSE notify messages
2332 int silc_server_remove_from_one_channel(SilcServer server,
2333 SilcSocketConnection sock,
2334 SilcChannelEntry channel,
2335 SilcClientEntry client,
2338 SilcChannelEntry ch;
2339 SilcChannelClientEntry chl;
2342 SILC_LOG_DEBUG(("Start"));
2344 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2346 /* Remove the client from the channel. The client is removed from
2347 the channel's user list. */
2348 silc_list_start(client->channels);
2349 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2350 if (chl->channel != channel)
2355 /* Remove channel from client's channel list */
2356 silc_list_del(client->channels, chl);
2358 /* Remove channel if there is no users anymore */
2359 if (server->server_type == SILC_ROUTER &&
2360 silc_list_count(channel->user_list) < 2) {
2361 if (!silc_idlist_del_channel(server->local_list, channel))
2362 silc_idlist_del_channel(server->global_list, channel);
2363 silc_buffer_free(clidp);
2364 server->stat.my_channels--;
2368 /* Remove client from channel's client list */
2369 silc_list_del(channel->user_list, chl);
2371 server->stat.my_chanclients--;
2373 /* If there is no global users on the channel anymore mark the channel
2374 as local channel. */
2375 if (server->server_type == SILC_SERVER &&
2376 !silc_server_channel_has_global(channel))
2377 channel->global_users = FALSE;
2379 /* If there is not at least one local user on the channel then we don't
2380 need the channel entry anymore, we can remove it safely. */
2381 if (server->server_type == SILC_SERVER &&
2382 !silc_server_channel_has_local(channel)) {
2383 /* Notify about leaving client if this channel has global users. */
2384 if (notify && channel->global_users)
2385 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2386 SILC_NOTIFY_TYPE_LEAVE, 1,
2387 clidp->data, clidp->len);
2389 if (!silc_idlist_del_channel(server->local_list, channel))
2390 silc_idlist_del_channel(server->global_list, channel);
2391 silc_buffer_free(clidp);
2392 server->stat.my_channels--;
2396 /* Send notify to channel about client leaving the channel */
2398 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2399 SILC_NOTIFY_TYPE_LEAVE, 1,
2400 clidp->data, clidp->len);
2404 silc_buffer_free(clidp);
2408 /* Returns TRUE if the given client is on the channel. FALSE if not.
2409 This works because we assure that the user list on the channel is
2410 always in up to date thus we can only check the channel list from
2411 `client' which is faster than checking the user list from `channel'. */
2413 int silc_server_client_on_channel(SilcClientEntry client,
2414 SilcChannelEntry channel)
2416 SilcChannelClientEntry chl;
2418 if (!client || !channel)
2421 silc_list_start(client->channels);
2422 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2423 if (chl->channel == channel)
2429 /* Timeout callback. This is called if connection is idle or for some
2430 other reason is not responding within some period of time. This
2431 disconnects the remote end. */
2433 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2435 SilcServer server = (SilcServer)context;
2436 SilcSocketConnection sock = server->sockets[fd];
2441 if (sock->user_data)
2442 silc_server_free_sock_user_data(server, sock);
2444 silc_server_disconnect_remote(server, sock,
2445 "Server closed connection: "
2446 "Connection timeout");
2449 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2450 function may be used only by router. In real SILC network all channels
2451 are created by routers thus this function is never used by normal
2454 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2455 SilcServerID *router_id,
2461 SilcChannelID *channel_id;
2462 SilcChannelEntry entry;
2466 SILC_LOG_DEBUG(("Creating new channel"));
2469 cipher = "aes-256-cbc";
2471 hmac = "hmac-sha1-96";
2473 /* Allocate cipher */
2474 if (!silc_cipher_alloc(cipher, &key))
2478 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2479 silc_cipher_free(key);
2483 channel_name = strdup(channel_name);
2485 /* Create the channel */
2486 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2487 entry = silc_idlist_add_channel(server->local_list, channel_name,
2488 SILC_CHANNEL_MODE_NONE, channel_id,
2489 NULL, key, newhmac);
2491 silc_free(channel_name);
2495 entry->cipher = strdup(cipher);
2496 entry->hmac_name = strdup(hmac);
2498 /* Now create the actual key material */
2499 silc_server_create_channel_key(server, entry,
2500 silc_cipher_get_key_len(key) / 8);
2502 /* Notify other routers about the new channel. We send the packet
2503 to our primary route. */
2504 if (broadcast && server->standalone == FALSE)
2505 silc_server_send_new_channel(server, server->router->connection, TRUE,
2506 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2509 server->stat.my_channels++;
2514 /* Same as above but creates the channel with Channel ID `channel_id. */
2517 silc_server_create_new_channel_with_id(SilcServer server,
2521 SilcChannelID *channel_id,
2524 SilcChannelEntry entry;
2528 SILC_LOG_DEBUG(("Creating new channel"));
2531 cipher = "aes-256-cbc";
2533 hmac = "hmac-sha1-96";
2535 /* Allocate cipher */
2536 if (!silc_cipher_alloc(cipher, &key))
2540 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2541 silc_cipher_free(key);
2545 channel_name = strdup(channel_name);
2547 /* Create the channel */
2548 entry = silc_idlist_add_channel(server->local_list, channel_name,
2549 SILC_CHANNEL_MODE_NONE, channel_id,
2550 NULL, key, newhmac);
2552 silc_free(channel_name);
2556 /* Now create the actual key material */
2557 silc_server_create_channel_key(server, entry,
2558 silc_cipher_get_key_len(key) / 8);
2560 /* Notify other routers about the new channel. We send the packet
2561 to our primary route. */
2562 if (broadcast && server->standalone == FALSE)
2563 silc_server_send_new_channel(server, server->router->connection, TRUE,
2564 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2567 server->stat.my_channels++;
2572 /* Generates new channel key. This is used to create the initial channel key
2573 but also to re-generate new key for channel. If `key_len' is provided
2574 it is the bytes of the key length. */
2576 void silc_server_create_channel_key(SilcServer server,
2577 SilcChannelEntry channel,
2578 unsigned int key_len)
2581 unsigned char channel_key[32], hash[32];
2584 SILC_LOG_DEBUG(("Generating channel key"));
2586 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2587 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2591 if (!channel->channel_key)
2592 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2597 else if (channel->key_len)
2598 len = channel->key_len / 8;
2600 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2602 /* Create channel key */
2603 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2606 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2608 /* Remove old key if exists */
2610 memset(channel->key, 0, channel->key_len / 8);
2611 silc_free(channel->key);
2615 channel->key_len = len * 8;
2616 channel->key = silc_calloc(len, sizeof(*channel->key));
2617 memcpy(channel->key, channel_key, len);
2618 memset(channel_key, 0, sizeof(channel_key));
2620 /* Generate HMAC key from the channel key data and set it */
2622 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2623 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2624 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2625 memset(hash, 0, sizeof(hash));
2628 /* Saves the channel key found in the encoded `key_payload' buffer. This
2629 function is used when we receive Channel Key Payload and also when we're
2630 processing JOIN command reply. Returns entry to the channel. */
2632 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2633 SilcBuffer key_payload,
2634 SilcChannelEntry channel)
2636 SilcChannelKeyPayload payload = NULL;
2637 SilcChannelID *id = NULL;
2638 unsigned char *tmp, hash[32];
2639 unsigned int tmp_len;
2642 SILC_LOG_DEBUG(("Start"));
2644 /* Decode channel key payload */
2645 payload = silc_channel_key_payload_parse(key_payload);
2647 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2652 /* Get the channel entry */
2655 /* Get channel ID */
2656 tmp = silc_channel_key_get_id(payload, &tmp_len);
2657 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2663 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2665 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2667 SILC_LOG_ERROR(("Received key for non-existent channel"));
2673 tmp = silc_channel_key_get_key(payload, &tmp_len);
2679 cipher = silc_channel_key_get_cipher(payload, NULL);
2685 /* Remove old key if exists */
2687 memset(channel->key, 0, channel->key_len / 8);
2688 silc_free(channel->key);
2689 silc_cipher_free(channel->channel_key);
2692 /* Create new cipher */
2693 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2698 if (channel->cipher)
2699 silc_free(channel->cipher);
2700 channel->cipher = strdup(cipher);
2703 channel->key_len = tmp_len * 8;
2704 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2705 memcpy(channel->key, tmp, tmp_len);
2706 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2708 /* Generate HMAC key from the channel key data and set it */
2710 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2711 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2712 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2714 memset(hash, 0, sizeof(hash));
2715 memset(tmp, 0, tmp_len);
2721 silc_channel_key_payload_free(payload);
2726 /* Heartbeat callback. This function is set as argument for the
2727 silc_socket_set_heartbeat function. The library will call this function
2728 at the set time interval. */
2730 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2733 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2735 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2738 /* Send the heartbeat */
2739 silc_server_send_heartbeat(hb->server, sock);
2742 /* Returns assembled of all servers in the given ID list. The packet's
2743 form is dictated by the New ID payload. */
2745 static void silc_server_announce_get_servers(SilcServer server,
2747 SilcBuffer *servers)
2749 SilcIDCacheList list;
2750 SilcIDCacheEntry id_cache;
2751 SilcServerEntry entry;
2754 /* Go through all clients in the list */
2755 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2756 SILC_ID_SERVER, &list)) {
2757 if (silc_idcache_list_first(list, &id_cache)) {
2759 entry = (SilcServerEntry)id_cache->context;
2761 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2763 *servers = silc_buffer_realloc(*servers,
2765 (*servers)->truelen + idp->len :
2767 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2768 silc_buffer_put(*servers, idp->data, idp->len);
2769 silc_buffer_pull(*servers, idp->len);
2770 silc_buffer_free(idp);
2772 if (!silc_idcache_list_next(list, &id_cache))
2777 silc_idcache_list_free(list);
2781 /* This function is used by router to announce existing servers to our
2782 primary router when we've connected to it. */
2784 void silc_server_announce_servers(SilcServer server)
2786 SilcBuffer servers = NULL;
2788 SILC_LOG_DEBUG(("Announcing servers"));
2790 /* Get servers in local list */
2791 silc_server_announce_get_servers(server, server->local_list, &servers);
2793 /* Get servers in global list */
2794 silc_server_announce_get_servers(server, server->global_list, &servers);
2797 silc_buffer_push(servers, servers->data - servers->head);
2798 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2800 /* Send the packet */
2801 silc_server_packet_send(server, server->router->connection,
2802 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2803 servers->data, servers->len, TRUE);
2805 silc_buffer_free(servers);
2809 /* Returns assembled packet of all clients in the given ID list. The
2810 packet's form is dictated by the New ID Payload. */
2812 static void silc_server_announce_get_clients(SilcServer server,
2814 SilcBuffer *clients)
2816 SilcIDCacheList list;
2817 SilcIDCacheEntry id_cache;
2818 SilcClientEntry client;
2821 /* Go through all clients in the list */
2822 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2823 SILC_ID_CLIENT, &list)) {
2824 if (silc_idcache_list_first(list, &id_cache)) {
2826 client = (SilcClientEntry)id_cache->context;
2828 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2830 *clients = silc_buffer_realloc(*clients,
2832 (*clients)->truelen + idp->len :
2834 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2835 silc_buffer_put(*clients, idp->data, idp->len);
2836 silc_buffer_pull(*clients, idp->len);
2837 silc_buffer_free(idp);
2839 if (!silc_idcache_list_next(list, &id_cache))
2844 silc_idcache_list_free(list);
2848 /* This function is used to announce our existing clients to our router
2849 when we've connected to it. */
2851 void silc_server_announce_clients(SilcServer server)
2853 SilcBuffer clients = NULL;
2855 SILC_LOG_DEBUG(("Announcing clients"));
2857 /* Get clients in local list */
2858 silc_server_announce_get_clients(server, server->local_list,
2861 /* As router we announce our global list as well */
2862 if (server->server_type == SILC_ROUTER)
2863 silc_server_announce_get_clients(server, server->global_list,
2867 silc_buffer_push(clients, clients->data - clients->head);
2868 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2870 /* Send the packet */
2871 silc_server_packet_send(server, server->router->connection,
2872 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2873 clients->data, clients->len, TRUE);
2875 silc_buffer_free(clients);
2880 silc_server_announce_encode_join(unsigned int argc, ...)
2885 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
2888 /* Returns assembled packets for channel users of the `channel'. */
2890 void silc_server_announce_get_channel_users(SilcServer server,
2891 SilcChannelEntry channel,
2892 SilcBuffer *channel_users)
2894 SilcChannelClientEntry chl;
2895 SilcBuffer chidp, clidp;
2899 SILC_LOG_DEBUG(("Start"));
2901 /* Now find all users on the channel */
2902 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
2903 silc_list_start(channel->user_list);
2904 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2905 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
2906 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
2907 chidp->data, chidp->len);
2910 silc_buffer_realloc(*channel_users,
2912 (*channel_users)->truelen + len : len));
2913 silc_buffer_pull_tail(*channel_users,
2914 ((*channel_users)->end -
2915 (*channel_users)->data));
2917 silc_buffer_put(*channel_users, tmp->data, tmp->len);
2918 silc_buffer_pull(*channel_users, len);
2919 silc_buffer_free(clidp);
2920 silc_buffer_free(tmp);
2922 silc_buffer_free(chidp);
2925 /* Returns assembled packets for all channels and users on those channels
2926 from the given ID List. The packets are in the form dictated by the
2927 New Channel and New Channel User payloads. */
2929 void silc_server_announce_get_channels(SilcServer server,
2931 SilcBuffer *channels,
2932 SilcBuffer *channel_users)
2934 SilcIDCacheList list;
2935 SilcIDCacheEntry id_cache;
2936 SilcChannelEntry channel;
2938 unsigned short name_len;
2941 SILC_LOG_DEBUG(("Start"));
2943 /* Go through all channels in the list */
2944 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2945 SILC_ID_CHANNEL, &list)) {
2946 if (silc_idcache_list_first(list, &id_cache)) {
2948 channel = (SilcChannelEntry)id_cache->context;
2950 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2951 name_len = strlen(channel->channel_name);
2953 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
2955 silc_buffer_realloc(*channels,
2956 (*channels ? (*channels)->truelen + len : len));
2957 silc_buffer_pull_tail(*channels,
2958 ((*channels)->end - (*channels)->data));
2959 silc_buffer_format(*channels,
2960 SILC_STR_UI_SHORT(name_len),
2961 SILC_STR_UI_XNSTRING(channel->channel_name,
2963 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2964 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2965 SILC_STR_UI_INT(channel->mode),
2967 silc_buffer_pull(*channels, len);
2969 silc_server_announce_get_channel_users(server, channel,
2974 if (!silc_idcache_list_next(list, &id_cache))
2979 silc_idcache_list_free(list);
2983 /* This function is used to announce our existing channels to our router
2984 when we've connected to it. This also announces the users on the
2985 channels to the router. */
2987 void silc_server_announce_channels(SilcServer server)
2989 SilcBuffer channels = NULL, channel_users = NULL;
2991 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2993 /* Get channels and channel users in local list */
2994 silc_server_announce_get_channels(server, server->local_list,
2995 &channels, &channel_users);
2997 /* Get channels and channel users in global list */
2998 silc_server_announce_get_channels(server, server->global_list,
2999 &channels, &channel_users);
3002 silc_buffer_push(channels, channels->data - channels->head);
3003 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3005 /* Send the packet */
3006 silc_server_packet_send(server, server->router->connection,
3007 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3008 channels->data, channels->len,
3011 silc_buffer_free(channels);
3014 if (channel_users) {
3015 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3016 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3017 channel_users->len);
3019 /* Send the packet */
3020 silc_server_packet_send(server, server->router->connection,
3021 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3022 channel_users->data, channel_users->len,
3025 silc_buffer_free(channel_users);
3029 /* Failure timeout callback. If this is called then we will immediately
3030 process the received failure. We always process the failure with timeout
3031 since we do not want to blindly trust to received failure packets.
3032 This won't be called (the timeout is cancelled) if the failure was
3033 bogus (it is bogus if remote does not close the connection after sending
3036 SILC_TASK_CALLBACK(silc_server_failure_callback)
3038 SilcServerFailureContext f = (SilcServerFailureContext)context;
3040 if (f->sock->protocol) {
3041 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3042 f->sock->protocol->execute(f->server->timeout_queue, 0,
3043 f->sock->protocol, f->sock->sock, 0, 0);
3049 /* Assembles user list and users mode list from the `channel'. */
3051 void silc_server_get_users_on_channel(SilcServer server,
3052 SilcChannelEntry channel,
3053 SilcBuffer *user_list,
3054 SilcBuffer *mode_list,
3055 unsigned int *user_count)
3057 SilcChannelClientEntry chl;
3058 SilcBuffer client_id_list;
3059 SilcBuffer client_mode_list;
3061 unsigned int list_count = 0;
3063 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3064 silc_list_count(channel->user_list));
3065 client_mode_list = silc_buffer_alloc(4 *
3066 silc_list_count(channel->user_list));
3067 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3068 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3069 silc_list_start(channel->user_list);
3070 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3072 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3073 silc_buffer_put(client_id_list, idp->data, idp->len);
3074 silc_buffer_pull(client_id_list, idp->len);
3075 silc_buffer_free(idp);
3077 /* Client's mode on channel */
3078 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3079 silc_buffer_pull(client_mode_list, 4);
3083 silc_buffer_push(client_id_list,
3084 client_id_list->data - client_id_list->head);
3085 silc_buffer_push(client_mode_list,
3086 client_mode_list->data - client_mode_list->head);
3088 *user_list = client_id_list;
3089 *mode_list = client_mode_list;
3090 *user_count = list_count;
3093 /* Saves users and their modes to the `channel'. */
3095 void silc_server_save_users_on_channel(SilcServer server,
3096 SilcSocketConnection sock,
3097 SilcChannelEntry channel,
3098 SilcClientID *noadd,
3099 SilcBuffer user_list,
3100 SilcBuffer mode_list,
3101 unsigned int user_count)
3105 /* Cache the received Client ID's and modes. This cache expires
3106 whenever server sends notify message to channel. It means two things;
3107 some user has joined or leaved the channel. XXX TODO! */
3108 for (i = 0; i < user_count; i++) {
3109 unsigned short idp_len;
3111 SilcClientID *client_id;
3112 SilcClientEntry client;
3115 SILC_GET16_MSB(idp_len, user_list->data + 2);
3117 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3118 silc_buffer_pull(user_list, idp_len);
3123 SILC_GET32_MSB(mode, mode_list->data);
3124 silc_buffer_pull(mode_list, 4);
3126 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3127 silc_free(client_id);
3131 /* Check if we have this client cached already. */
3132 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3135 client = silc_idlist_find_client_by_id(server->global_list,
3138 /* If router did not find such Client ID in its lists then this must
3139 be bogus client or some router in the net is buggy. */
3140 if (server->server_type == SILC_ROUTER) {
3141 silc_free(client_id);
3145 /* We don't have that client anywhere, add it. The client is added
3146 to global list since server didn't have it in the lists so it must be
3148 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3150 silc_id_dup(client_id, SILC_ID_CLIENT),
3151 sock->user_data, NULL);
3153 silc_free(client_id);
3157 client->data.registered = TRUE;
3160 silc_free(client_id);
3162 if (!silc_server_client_on_channel(client, channel)) {
3163 /* Client was not on the channel, add it. */
3164 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3165 chl->client = client;
3167 chl->channel = channel;
3168 silc_list_add(channel->user_list, chl);
3169 silc_list_add(client->channels, chl);
3174 /* Lookups route to the client indicated by `id' client ID. The connection
3175 object and internal data object is returned. Returns NULL if route
3176 could not be found to the client. If the `client_id' is specified then
3177 it is used and the `id_data' is ignored. */
3179 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3180 unsigned char *id_data,
3181 unsigned int id_len,
3182 SilcClientID *client_id,
3183 SilcIDListData *idata)
3186 SilcClientEntry client;
3188 SILC_LOG_DEBUG(("Start"));
3190 /* Decode destination Client ID */
3192 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3194 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3198 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3201 /* If the destination belongs to our server we don't have to route
3202 the packet anywhere but to send it to the local destination. */
3203 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3207 if (client && client->data.registered == FALSE)
3210 /* If we are router and the client has router then the client is in
3211 our cell but not directly connected to us. */
3212 if (server->server_type == SILC_ROUTER && client->router) {
3213 /* We are of course in this case the client's router thus the real
3214 "router" of the client is the server who owns the client. Thus
3215 we will send the packet to that server. */
3216 *idata = (SilcIDListData)client->router;
3217 return client->router->connection;
3220 /* Seems that client really is directly connected to us */
3221 *idata = (SilcIDListData)client;
3222 return client->connection;
3225 /* Destination belongs to someone not in this server. If we are normal
3226 server our action is to send the packet to our router. */
3227 if (server->server_type == SILC_SERVER && !server->standalone) {
3229 *idata = (SilcIDListData)server->router;
3230 return server->router->connection;
3233 /* We are router and we will perform route lookup for the destination
3234 and send the packet to fastest route. */
3235 if (server->server_type == SILC_ROUTER && !server->standalone) {
3236 /* Check first that the ID is valid */
3237 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3239 SilcSocketConnection dst_sock;
3241 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3244 *idata = (SilcIDListData)dst_sock->user_data;
3253 /* Encodes and returns channel list of channels the `client' has joined.
3254 Secret channels are not put to the list. */
3256 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3257 SilcClientEntry client)
3259 SilcBuffer buffer = NULL;
3260 SilcChannelEntry channel;
3261 SilcChannelClientEntry chl;
3263 unsigned short name_len;
3266 silc_list_start(client->channels);
3267 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3268 channel = chl->channel;
3270 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3273 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3274 name_len = strlen(channel->channel_name);
3276 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3277 buffer = silc_buffer_realloc(buffer,
3278 (buffer ? (buffer)->truelen + len : len));
3279 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3280 silc_buffer_format(buffer,
3281 SILC_STR_UI_SHORT(name_len),
3282 SILC_STR_UI_XNSTRING(channel->channel_name,
3284 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3285 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3286 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3288 silc_buffer_pull(buffer, len);
3293 silc_buffer_push(buffer, buffer->data - buffer->head);
3298 /* Finds client entry by Client ID and if it is not found then resolves
3299 it using WHOIS command. */
3301 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3302 SilcClientID *client_id)
3304 SilcClientEntry client;
3306 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3308 client = silc_idlist_find_client_by_id(server->global_list,
3310 if (!client && server->server_type == SILC_ROUTER)
3314 if (!client && server->standalone)
3317 if (!client || !client->nickname || !client->username) {
3318 SilcBuffer buffer, idp;
3320 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3321 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3322 ++server->cmd_ident, 1,
3323 3, idp->data, idp->len);
3324 silc_server_packet_send(server, client ? client->router->connection :
3325 server->router->connection,
3326 SILC_PACKET_COMMAND, 0,
3327 buffer->data, buffer->len, FALSE);
3328 silc_buffer_free(idp);
3329 silc_buffer_free(buffer);