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);
788 silc_ske_free_key_material(ctx->keymat);
790 silc_packet_context_free(ctx->packet);
792 silc_ske_free(ctx->ske);
794 silc_free(ctx->dest_id);
796 silc_task_unregister_by_callback(server->timeout_queue,
797 silc_server_failure_callback);
798 silc_server_disconnect_remote(server, sock, "Server closed connection: "
799 "Key exchange failed");
803 /* Free old protocol as it is finished now */
804 silc_protocol_free(protocol);
806 silc_packet_context_free(ctx->packet);
808 sock->protocol = NULL;
810 /* Allocate the authentication protocol. This is allocated here
811 but we won't start it yet. We will be receiving party of this
812 protocol thus we will wait that connecting party will make
814 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
815 &sock->protocol, proto_ctx,
816 silc_server_connect_to_router_final);
818 /* Register timeout task. If the protocol is not executed inside
819 this timelimit the connection will be terminated. Currently
820 this is 15 seconds and is hard coded limit (XXX). */
821 proto_ctx->timeout_task =
822 silc_task_register(server->timeout_queue, sock->sock,
823 silc_server_timeout_remote,
824 (void *)server, 15, 0,
828 /* Run the protocol */
829 sock->protocol->execute(server->timeout_queue, 0,
830 sock->protocol, sock->sock, 0, 0);
833 /* Finalizes the connection to router. Registers a server task to the
834 queue so that we can accept new connections. */
836 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
838 SilcProtocol protocol = (SilcProtocol)context;
839 SilcServerConnAuthInternalContext *ctx =
840 (SilcServerConnAuthInternalContext *)protocol->context;
841 SilcServer server = (SilcServer)ctx->server;
842 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
843 SilcSocketConnection sock = ctx->sock;
844 SilcServerEntry id_entry;
846 SilcServerHBContext hb_context;
847 unsigned char *id_string;
849 SILC_LOG_DEBUG(("Start"));
851 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
852 /* Error occured during protocol */
854 silc_free(ctx->dest_id);
855 silc_server_disconnect_remote(server, sock, "Server closed connection: "
856 "Authentication failed");
860 /* Add a task to the queue. This task receives new connections to the
861 server. This task remains on the queue until the end of the program. */
862 if (!server->listenning) {
863 silc_task_register(server->io_queue, server->sock,
864 silc_server_accept_new_connection,
865 (void *)server, 0, 0,
867 SILC_TASK_PRI_NORMAL);
868 server->listenning = TRUE;
871 /* Send NEW_SERVER packet to the router. We will become registered
872 to the SILC network after sending this packet. */
873 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
874 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
875 strlen(server->server_name));
876 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
877 silc_buffer_format(packet,
878 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
879 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
880 SILC_STR_UI_SHORT(strlen(server->server_name)),
881 SILC_STR_UI_XNSTRING(server->server_name,
882 strlen(server->server_name)),
885 /* Send the packet */
886 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
887 packet->data, packet->len, TRUE);
888 silc_buffer_free(packet);
889 silc_free(id_string);
891 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
893 /* Add the connected router to local server list */
894 server->standalone = FALSE;
895 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
896 SILC_ROUTER, ctx->dest_id, NULL, sock);
899 silc_free(ctx->dest_id);
900 silc_server_disconnect_remote(server, sock, "Server closed connection: "
901 "Authentication failed");
905 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
906 silc_free(sock->user_data);
907 sock->user_data = (void *)id_entry;
908 sock->type = SILC_SOCKET_TYPE_ROUTER;
909 server->id_entry->router = id_entry;
910 server->router = id_entry;
911 server->router->data.registered = TRUE;
913 /* Perform keepalive. The `hb_context' will be freed automatically
914 when finally calling the silc_socket_free function. XXX hardcoded
916 hb_context = silc_calloc(1, sizeof(*hb_context));
917 hb_context->server = server;
918 silc_socket_set_heartbeat(sock, 600, hb_context,
919 silc_server_perform_heartbeat,
920 server->timeout_queue);
922 /* If we are router then announce our possible servers. */
923 if (server->server_type == SILC_ROUTER)
924 silc_server_announce_servers(server);
926 /* Announce our clients and channels to the router */
927 silc_server_announce_clients(server);
928 silc_server_announce_channels(server);
931 /* Free the temporary connection data context */
933 silc_free(sconn->remote_host);
937 /* Free the protocol object */
938 silc_protocol_free(protocol);
940 silc_packet_context_free(ctx->packet);
942 silc_ske_free(ctx->ske);
944 sock->protocol = NULL;
947 /* Accepts new connections to the server. Accepting new connections are
948 done in three parts to make it async. */
950 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
952 SilcServer server = (SilcServer)context;
953 SilcSocketConnection newsocket;
954 SilcServerKEInternalContext *proto_ctx;
957 SILC_LOG_DEBUG(("Accepting new connection"));
959 server->stat.conn_attempts++;
961 sock = silc_net_accept_connection(server->sock);
963 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
964 server->stat.conn_failures++;
968 /* Check max connections */
969 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
970 SILC_LOG_ERROR(("Refusing connection, server is full"));
971 server->stat.conn_failures++;
975 /* Set socket options */
976 silc_net_set_socket_nonblock(sock);
977 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
979 /* We don't create a ID yet, since we don't know what type of connection
980 this is yet. But, we do add the connection to the socket table. */
981 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
982 server->sockets[sock] = newsocket;
984 /* XXX This MUST be done async as this will block the entire server
985 process. Either we have to do our own resolver stuff or in the future
986 we can use threads. */
987 /* Perform name and address lookups for the remote host. */
988 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
989 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
991 SILC_LOG_ERROR(("IP/DNS lookup failed"));
992 server->stat.conn_failures++;
995 if (!newsocket->hostname)
996 newsocket->hostname = strdup(newsocket->ip);
997 newsocket->port = silc_net_get_remote_port(sock);
999 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1002 /* Allocate internal context for key exchange protocol. This is
1003 sent as context for the protocol. */
1004 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1005 proto_ctx->server = context;
1006 proto_ctx->sock = newsocket;
1007 proto_ctx->rng = server->rng;
1008 proto_ctx->responder = TRUE;
1010 /* Prepare the connection for key exchange protocol. We allocate the
1011 protocol but will not start it yet. The connector will be the
1012 initiator of the protocol thus we will wait for initiation from
1013 there before we start the protocol. */
1014 server->stat.auth_attempts++;
1015 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1016 &newsocket->protocol, proto_ctx,
1017 silc_server_accept_new_connection_second);
1019 /* Register a timeout task that will be executed if the connector
1020 will not start the key exchange protocol within 60 seconds. For
1021 now, this is a hard coded limit. After 60 secs the connection will
1022 be closed if the key exchange protocol has not been started. */
1023 proto_ctx->timeout_task =
1024 silc_task_register(server->timeout_queue, newsocket->sock,
1025 silc_server_timeout_remote,
1030 /* Register the connection for network input and output. This sets
1031 that scheduler will listen for incoming packets for this connection
1032 and sets that outgoing packets may be sent to this connection as well.
1033 However, this doesn't set the scheduler for outgoing traffic, it
1034 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1035 later when outgoing data is available. */
1036 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1039 /* Second part of accepting new connection. Key exchange protocol has been
1040 performed and now it is time to do little connection authentication
1041 protocol to figure out whether this connection is client or server
1042 and whether it has right to access this server (especially server
1043 connections needs to be authenticated). */
1045 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1047 SilcProtocol protocol = (SilcProtocol)context;
1048 SilcServerKEInternalContext *ctx =
1049 (SilcServerKEInternalContext *)protocol->context;
1050 SilcServer server = (SilcServer)ctx->server;
1051 SilcSocketConnection sock = NULL;
1052 SilcServerConnAuthInternalContext *proto_ctx;
1054 SILC_LOG_DEBUG(("Start"));
1056 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1057 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1058 /* Error occured during protocol */
1059 silc_protocol_free(protocol);
1060 silc_ske_free_key_material(ctx->keymat);
1062 silc_packet_context_free(ctx->packet);
1064 silc_ske_free(ctx->ske);
1066 silc_free(ctx->dest_id);
1068 silc_task_unregister_by_callback(server->timeout_queue,
1069 silc_server_failure_callback);
1070 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1071 "Key exchange failed");
1072 server->stat.auth_failures++;
1076 /* We now have the key material as the result of the key exchange
1077 protocol. Take the key material into use. Free the raw key material
1078 as soon as we've set them into use. */
1079 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1080 ctx->ske->prop->cipher,
1081 ctx->ske->prop->pkcs,
1082 ctx->ske->prop->hash,
1083 ctx->ske->prop->hmac,
1085 silc_protocol_free(protocol);
1086 silc_ske_free_key_material(ctx->keymat);
1088 silc_packet_context_free(ctx->packet);
1090 silc_ske_free(ctx->ske);
1092 silc_free(ctx->dest_id);
1094 silc_task_unregister_by_callback(server->timeout_queue,
1095 silc_server_failure_callback);
1096 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1097 "Key exchange failed");
1098 server->stat.auth_failures++;
1101 silc_ske_free_key_material(ctx->keymat);
1103 /* Allocate internal context for the authentication protocol. This
1104 is sent as context for the protocol. */
1105 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1106 proto_ctx->server = (void *)server;
1107 proto_ctx->sock = sock = server->sockets[fd];
1108 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1109 proto_ctx->responder = TRUE;
1110 proto_ctx->dest_id_type = ctx->dest_id_type;
1111 proto_ctx->dest_id = ctx->dest_id;
1113 /* Free old protocol as it is finished now */
1114 silc_protocol_free(protocol);
1116 silc_packet_context_free(ctx->packet);
1118 sock->protocol = NULL;
1120 /* Allocate the authentication protocol. This is allocated here
1121 but we won't start it yet. We will be receiving party of this
1122 protocol thus we will wait that connecting party will make
1123 their first move. */
1124 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1125 &sock->protocol, proto_ctx,
1126 silc_server_accept_new_connection_final);
1128 /* Register timeout task. If the protocol is not executed inside
1129 this timelimit the connection will be terminated. Currently
1130 this is 60 seconds and is hard coded limit (XXX). */
1131 proto_ctx->timeout_task =
1132 silc_task_register(server->timeout_queue, sock->sock,
1133 silc_server_timeout_remote,
1134 (void *)server, 60, 0,
1139 /* Final part of accepting new connection. The connection has now
1140 been authenticated and keys has been exchanged. We also know whether
1141 this is client or server connection. */
1143 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1145 SilcProtocol protocol = (SilcProtocol)context;
1146 SilcServerConnAuthInternalContext *ctx =
1147 (SilcServerConnAuthInternalContext *)protocol->context;
1148 SilcServer server = (SilcServer)ctx->server;
1149 SilcSocketConnection sock = ctx->sock;
1150 SilcServerHBContext hb_context;
1151 void *id_entry = NULL;
1153 SILC_LOG_DEBUG(("Start"));
1155 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1156 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1157 /* Error occured during protocol */
1158 silc_protocol_free(protocol);
1160 silc_packet_context_free(ctx->packet);
1162 silc_ske_free(ctx->ske);
1164 silc_free(ctx->dest_id);
1167 sock->protocol = NULL;
1168 silc_task_unregister_by_callback(server->timeout_queue,
1169 silc_server_failure_callback);
1170 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1171 "Authentication failed");
1172 server->stat.auth_failures++;
1176 sock->type = ctx->conn_type;
1177 switch(sock->type) {
1178 case SILC_SOCKET_TYPE_CLIENT:
1180 SilcClientEntry client;
1182 SILC_LOG_DEBUG(("Remote host is client"));
1183 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1186 /* Add the client to the client ID cache. The nickname and Client ID
1187 and other information is created after we have received NEW_CLIENT
1188 packet from client. */
1189 client = silc_idlist_add_client(server->local_list,
1190 NULL, 0, NULL, NULL, NULL, NULL, sock);
1192 SILC_LOG_ERROR(("Could not add new client to cache"));
1193 silc_free(sock->user_data);
1198 server->stat.my_clients++;
1199 server->stat.clients++;
1200 if (server->server_type == SILC_ROUTER)
1201 server->stat.cell_clients++;
1203 id_entry = (void *)client;
1206 case SILC_SOCKET_TYPE_SERVER:
1207 case SILC_SOCKET_TYPE_ROUTER:
1209 SilcServerEntry new_server;
1211 SILC_LOG_DEBUG(("Remote host is %s",
1212 sock->type == SILC_SOCKET_TYPE_SERVER ?
1213 "server" : "router"));
1214 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1215 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1216 "server" : "router"));
1218 /* Add the server into server cache. The server name and Server ID
1219 is updated after we have received NEW_SERVER packet from the
1220 server. We mark ourselves as router for this server if we really
1223 silc_idlist_add_server(server->local_list, NULL,
1224 sock->type == SILC_SOCKET_TYPE_SERVER ?
1225 SILC_SERVER : SILC_ROUTER, NULL,
1226 sock->type == SILC_SOCKET_TYPE_SERVER ?
1227 server->id_entry : NULL, sock);
1229 SILC_LOG_ERROR(("Could not add new server to cache"));
1230 silc_free(sock->user_data);
1235 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1236 server->stat.my_servers++;
1238 server->stat.my_routers++;
1239 server->stat.servers++;
1241 id_entry = (void *)new_server;
1243 /* There is connection to other server now, if it is router then
1244 we will have connection to outside world. If we are router but
1245 normal server connected to us then we will remain standalone,
1246 if we are standlone. */
1247 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1248 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1249 server->standalone = FALSE;
1250 if (!server->id_entry->router) {
1251 server->id_entry->router = id_entry;
1252 server->router = id_entry;
1261 /* Add the common data structure to the ID entry. */
1263 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1265 /* Add to sockets internal pointer for fast referencing */
1266 silc_free(sock->user_data);
1267 sock->user_data = id_entry;
1269 /* Connection has been fully established now. Everything is ok. */
1270 SILC_LOG_DEBUG(("New connection authenticated"));
1272 /* Perform keepalive. The `hb_context' will be freed automatically
1273 when finally calling the silc_socket_free function. XXX hardcoded
1275 hb_context = silc_calloc(1, sizeof(*hb_context));
1276 hb_context->server = server;
1277 silc_socket_set_heartbeat(sock, 600, hb_context,
1278 silc_server_perform_heartbeat,
1279 server->timeout_queue);
1281 silc_task_unregister_by_callback(server->timeout_queue,
1282 silc_server_failure_callback);
1283 silc_protocol_free(protocol);
1285 silc_packet_context_free(ctx->packet);
1287 silc_ske_free(ctx->ske);
1289 silc_free(ctx->dest_id);
1291 sock->protocol = NULL;
1294 /* This function is used to read packets from network and send packets to
1295 network. This is usually a generic task. */
1297 SILC_TASK_CALLBACK(silc_server_packet_process)
1299 SilcServer server = (SilcServer)context;
1300 SilcSocketConnection sock = server->sockets[fd];
1301 SilcIDListData idata;
1302 SilcCipher cipher = NULL;
1303 SilcHmac hmac = NULL;
1309 SILC_LOG_DEBUG(("Processing packet"));
1311 /* Packet sending */
1313 if (type == SILC_TASK_WRITE) {
1314 /* Do not send data to disconnected connection */
1315 if (SILC_IS_DISCONNECTED(sock))
1318 server->stat.packets_sent++;
1320 if (sock->outbuf->data - sock->outbuf->head)
1321 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1323 ret = silc_server_packet_send_real(server, sock, TRUE);
1325 /* If returned -2 could not write to connection now, will do
1333 /* The packet has been sent and now it is time to set the connection
1334 back to only for input. When there is again some outgoing data
1335 available for this connection it will be set for output as well.
1336 This call clears the output setting and sets it only for input. */
1337 SILC_SET_CONNECTION_FOR_INPUT(fd);
1338 SILC_UNSET_OUTBUF_PENDING(sock);
1340 silc_buffer_clear(sock->outbuf);
1344 /* Packet receiving */
1346 /* Read some data from connection */
1347 ret = silc_packet_receive(sock);
1353 SILC_LOG_DEBUG(("Read EOF"));
1355 /* If connection is disconnecting already we will finally
1356 close the connection */
1357 if (SILC_IS_DISCONNECTING(sock)) {
1358 if (sock->user_data)
1359 silc_server_free_sock_user_data(server, sock);
1360 silc_server_close_connection(server, sock);
1364 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1365 SILC_SET_DISCONNECTING(sock);
1367 /* If the closed connection was our primary router connection the
1368 start re-connecting phase. */
1369 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1370 sock == server->router->connection)
1371 silc_task_register(server->timeout_queue, 0,
1372 silc_server_connect_to_router,
1375 SILC_TASK_PRI_NORMAL);
1377 if (sock->user_data)
1378 silc_server_free_sock_user_data(server, sock);
1379 silc_server_close_connection(server, sock);
1383 /* If connection is disconnecting or disconnected we will ignore
1385 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1386 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1390 server->stat.packets_received++;
1392 /* Get keys and stuff from ID entry */
1393 idata = (SilcIDListData)sock->user_data;
1395 idata->last_receive = time(NULL);
1396 cipher = idata->receive_key;
1400 /* Process the packet. This will call the parser that will then
1401 decrypt and parse the packet. */
1402 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1406 /* Callback function that the silc_packet_decrypt will call to make the
1407 decision whether the packet is normal or special packet. We will
1408 return TRUE if it is normal and FALSE if it is special */
1410 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1412 SilcPacketContext *packet,
1415 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1416 SilcServer server = (SilcServer)parse_ctx->context;
1418 /* Packet is normal packet, if:
1420 1) packet is private message packet and does not have private key set
1421 2) is other packet than channel message packet
1422 3) is channel message packet and remote is router and we are router
1424 all other packets are special packets
1427 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1428 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1431 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1432 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1433 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1434 server->server_type == SILC_ROUTER))
1440 /* Parses whole packet, received earlier. */
1442 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1444 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1445 SilcServer server = (SilcServer)parse_ctx->context;
1446 SilcSocketConnection sock = parse_ctx->sock;
1447 SilcPacketContext *packet = parse_ctx->packet;
1450 SILC_LOG_DEBUG(("Start"));
1452 /* Decrypt the received packet */
1453 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1454 packet->buffer, packet,
1455 silc_server_packet_decrypt_check, parse_ctx);
1460 /* Parse the packet. Packet type is returned. */
1461 ret = silc_packet_parse(packet);
1463 /* Parse the packet header in special way as this is "special"
1465 ret = silc_packet_parse_special(packet);
1468 if (ret == SILC_PACKET_NONE)
1471 /* Check that the the current client ID is same as in the client's packet. */
1472 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1473 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1474 if (client && client->id) {
1475 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1476 packet->src_id_type);
1477 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1485 if (server->server_type == SILC_ROUTER) {
1486 /* Route the packet if it is not destined to us. Other ID types but
1487 server are handled separately after processing them. */
1488 if (packet->dst_id_type == SILC_ID_SERVER &&
1489 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1490 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1492 /* Route the packet to fastest route for the destination ID */
1493 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1494 packet->dst_id_type);
1497 silc_server_packet_route(server,
1498 silc_server_route_get(server, id,
1499 packet->dst_id_type),
1505 /* Broadcast packet if it is marked as broadcast packet and it is
1506 originated from router and we are router. */
1507 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1508 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1509 silc_server_packet_broadcast(server, server->router->connection, packet);
1513 /* Parse the incoming packet type */
1514 silc_server_packet_parse_type(server, sock, packet);
1517 silc_buffer_clear(sock->inbuf);
1518 silc_packet_context_free(packet);
1519 silc_free(parse_ctx);
1522 /* Parser callback called by silc_packet_receive_process. This merely
1523 registers timeout that will handle the actual parsing when appropriate. */
1525 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1527 SilcServer server = (SilcServer)parser_context->context;
1528 SilcSocketConnection sock = parser_context->sock;
1530 switch (sock->type) {
1531 case SILC_SOCKET_TYPE_CLIENT:
1532 case SILC_SOCKET_TYPE_UNKNOWN:
1533 /* Parse the packet with timeout */
1534 silc_task_register(server->timeout_queue, sock->sock,
1535 silc_server_packet_parse_real,
1536 (void *)parser_context, 0, 100000,
1538 SILC_TASK_PRI_NORMAL);
1540 case SILC_SOCKET_TYPE_SERVER:
1541 case SILC_SOCKET_TYPE_ROUTER:
1542 /* Packets from servers are parsed as soon as possible */
1543 silc_task_register(server->timeout_queue, sock->sock,
1544 silc_server_packet_parse_real,
1545 (void *)parser_context, 0, 1,
1547 SILC_TASK_PRI_NORMAL);
1554 /* Parses the packet type and calls what ever routines the packet type
1555 requires. This is done for all incoming packets. */
1557 void silc_server_packet_parse_type(SilcServer server,
1558 SilcSocketConnection sock,
1559 SilcPacketContext *packet)
1561 SilcPacketType type = packet->type;
1563 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1565 /* Parse the packet type */
1567 case SILC_PACKET_DISCONNECT:
1568 SILC_LOG_DEBUG(("Disconnect packet"));
1569 if (packet->flags & SILC_PACKET_FLAG_LIST)
1573 case SILC_PACKET_SUCCESS:
1575 * Success received for something. For now we can have only
1576 * one protocol for connection executing at once hence this
1577 * success message is for whatever protocol is executing currently.
1579 SILC_LOG_DEBUG(("Success packet"));
1580 if (packet->flags & SILC_PACKET_FLAG_LIST)
1582 if (sock->protocol) {
1583 sock->protocol->execute(server->timeout_queue, 0,
1584 sock->protocol, sock->sock, 0, 0);
1588 case SILC_PACKET_FAILURE:
1590 * Failure received for something. For now we can have only
1591 * one protocol for connection executing at once hence this
1592 * failure message is for whatever protocol is executing currently.
1594 SILC_LOG_DEBUG(("Failure packet"));
1595 if (packet->flags & SILC_PACKET_FLAG_LIST)
1597 if (sock->protocol) {
1598 SilcServerFailureContext f;
1599 f = silc_calloc(1, sizeof(*f));
1603 /* We will wait 5 seconds to process this failure packet */
1604 silc_task_register(server->timeout_queue, sock->sock,
1605 silc_server_failure_callback, (void *)f, 5, 0,
1606 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1610 case SILC_PACKET_REJECT:
1611 SILC_LOG_DEBUG(("Reject packet"));
1612 if (packet->flags & SILC_PACKET_FLAG_LIST)
1617 case SILC_PACKET_NOTIFY:
1619 * Received notify packet. Server can receive notify packets from
1620 * router. Server then relays the notify messages to clients if needed.
1622 SILC_LOG_DEBUG(("Notify packet"));
1623 if (packet->flags & SILC_PACKET_FLAG_LIST)
1624 silc_server_notify_list(server, sock, packet);
1626 silc_server_notify(server, sock, packet);
1632 case SILC_PACKET_CHANNEL_MESSAGE:
1634 * Received channel message. Channel messages are special packets
1635 * (although probably most common ones) thus they are handled
1638 SILC_LOG_DEBUG(("Channel Message packet"));
1639 if (packet->flags & SILC_PACKET_FLAG_LIST)
1641 silc_server_channel_message(server, sock, packet);
1644 case SILC_PACKET_CHANNEL_KEY:
1646 * Received key for channel. As channels are created by the router
1647 * the keys are as well. We will distribute the key to all of our
1648 * locally connected clients on the particular channel. Router
1649 * never receives this channel and thus is ignored.
1651 SILC_LOG_DEBUG(("Channel Key packet"));
1652 if (packet->flags & SILC_PACKET_FLAG_LIST)
1654 silc_server_channel_key(server, sock, packet);
1660 case SILC_PACKET_COMMAND:
1662 * Recived command. Processes the command request and allocates the
1663 * command context and calls the command.
1665 SILC_LOG_DEBUG(("Command packet"));
1666 if (packet->flags & SILC_PACKET_FLAG_LIST)
1668 silc_server_command_process(server, sock, packet);
1671 case SILC_PACKET_COMMAND_REPLY:
1673 * Received command reply packet. Received command reply to command. It
1674 * may be reply to command sent by us or reply to command sent by client
1675 * that we've routed further.
1677 SILC_LOG_DEBUG(("Command Reply packet"));
1678 if (packet->flags & SILC_PACKET_FLAG_LIST)
1680 silc_server_command_reply(server, sock, packet);
1684 * Private Message packets
1686 case SILC_PACKET_PRIVATE_MESSAGE:
1688 * Received private message packet. The packet is coming from either
1691 SILC_LOG_DEBUG(("Private Message packet"));
1692 if (packet->flags & SILC_PACKET_FLAG_LIST)
1694 silc_server_private_message(server, sock, packet);
1697 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1699 * Private message key packet.
1701 if (packet->flags & SILC_PACKET_FLAG_LIST)
1703 silc_server_private_message_key(server, sock, packet);
1707 * Key Exchange protocol packets
1709 case SILC_PACKET_KEY_EXCHANGE:
1710 SILC_LOG_DEBUG(("KE packet"));
1711 if (packet->flags & SILC_PACKET_FLAG_LIST)
1714 if (sock->protocol && sock->protocol->protocol->type
1715 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1717 SilcServerKEInternalContext *proto_ctx =
1718 (SilcServerKEInternalContext *)sock->protocol->context;
1720 proto_ctx->packet = silc_packet_context_dup(packet);
1722 /* Let the protocol handle the packet */
1723 sock->protocol->execute(server->timeout_queue, 0,
1724 sock->protocol, sock->sock, 0, 100000);
1726 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1727 "protocol active, packet dropped."));
1729 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1733 case SILC_PACKET_KEY_EXCHANGE_1:
1734 SILC_LOG_DEBUG(("KE 1 packet"));
1735 if (packet->flags & SILC_PACKET_FLAG_LIST)
1738 if (sock->protocol && sock->protocol->protocol->type
1739 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1741 SilcServerKEInternalContext *proto_ctx =
1742 (SilcServerKEInternalContext *)sock->protocol->context;
1744 if (proto_ctx->packet)
1745 silc_packet_context_free(proto_ctx->packet);
1747 proto_ctx->packet = silc_packet_context_dup(packet);
1748 proto_ctx->dest_id_type = packet->src_id_type;
1749 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1750 packet->src_id_type);
1751 if (!proto_ctx->dest_id)
1754 /* Let the protocol handle the packet */
1755 sock->protocol->execute(server->timeout_queue, 0,
1756 sock->protocol, sock->sock,
1759 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1760 "protocol active, packet dropped."));
1764 case SILC_PACKET_KEY_EXCHANGE_2:
1765 SILC_LOG_DEBUG(("KE 2 packet"));
1766 if (packet->flags & SILC_PACKET_FLAG_LIST)
1769 if (sock->protocol && sock->protocol->protocol->type
1770 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1772 SilcServerKEInternalContext *proto_ctx =
1773 (SilcServerKEInternalContext *)sock->protocol->context;
1775 if (proto_ctx->packet)
1776 silc_packet_context_free(proto_ctx->packet);
1778 proto_ctx->packet = silc_packet_context_dup(packet);
1779 proto_ctx->dest_id_type = packet->src_id_type;
1780 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1781 packet->src_id_type);
1782 if (!proto_ctx->dest_id)
1785 /* Let the protocol handle the packet */
1786 sock->protocol->execute(server->timeout_queue, 0,
1787 sock->protocol, sock->sock,
1790 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1791 "protocol active, packet dropped."));
1795 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1797 * Connection authentication request packet. When we receive this packet
1798 * we will send to the other end information about our mandatory
1799 * authentication method for the connection. This packet maybe received
1802 SILC_LOG_DEBUG(("Connection authentication request packet"));
1803 if (packet->flags & SILC_PACKET_FLAG_LIST)
1805 silc_server_connection_auth_request(server, sock, packet);
1809 * Connection Authentication protocol packets
1811 case SILC_PACKET_CONNECTION_AUTH:
1812 /* Start of the authentication protocol. We receive here the
1813 authentication data and will verify it. */
1814 SILC_LOG_DEBUG(("Connection auth packet"));
1815 if (packet->flags & SILC_PACKET_FLAG_LIST)
1818 if (sock->protocol && sock->protocol->protocol->type
1819 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1821 SilcServerConnAuthInternalContext *proto_ctx =
1822 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1824 proto_ctx->packet = silc_packet_context_dup(packet);
1826 /* Let the protocol handle the packet */
1827 sock->protocol->execute(server->timeout_queue, 0,
1828 sock->protocol, sock->sock, 0, 0);
1830 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1831 "protocol active, packet dropped."));
1835 case SILC_PACKET_NEW_ID:
1837 * Received New ID packet. This includes some new ID that has been
1838 * created. It may be for client, server or channel. This is the way
1839 * to distribute information about new registered entities in the
1842 SILC_LOG_DEBUG(("New ID packet"));
1843 if (packet->flags & SILC_PACKET_FLAG_LIST)
1844 silc_server_new_id_list(server, sock, packet);
1846 silc_server_new_id(server, sock, packet);
1849 case SILC_PACKET_NEW_CLIENT:
1851 * Received new client packet. This includes client information that
1852 * we will use to create initial client ID. After creating new
1853 * ID we will send it to the client.
1855 SILC_LOG_DEBUG(("New Client packet"));
1856 if (packet->flags & SILC_PACKET_FLAG_LIST)
1858 silc_server_new_client(server, sock, packet);
1861 case SILC_PACKET_NEW_SERVER:
1863 * Received new server packet. This includes Server ID and some other
1864 * information that we may save. This is received after server has
1867 SILC_LOG_DEBUG(("New Server packet"));
1868 if (packet->flags & SILC_PACKET_FLAG_LIST)
1870 silc_server_new_server(server, sock, packet);
1873 case SILC_PACKET_NEW_CHANNEL:
1875 * Received new channel packet. Information about new channel in the
1876 * network are distributed using this packet.
1878 SILC_LOG_DEBUG(("New Channel packet"));
1879 if (packet->flags & SILC_PACKET_FLAG_LIST)
1880 silc_server_new_channel_list(server, sock, packet);
1882 silc_server_new_channel(server, sock, packet);
1885 case SILC_PACKET_HEARTBEAT:
1887 * Received heartbeat.
1889 SILC_LOG_DEBUG(("Heartbeat packet"));
1890 if (packet->flags & SILC_PACKET_FLAG_LIST)
1894 case SILC_PACKET_KEY_AGREEMENT:
1896 * Received heartbeat.
1898 SILC_LOG_DEBUG(("Key agreement packet"));
1899 if (packet->flags & SILC_PACKET_FLAG_LIST)
1901 silc_server_key_agreement(server, sock, packet);
1905 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1911 /* Creates connection to a remote router. */
1913 void silc_server_create_connection(SilcServer server,
1914 char *remote_host, unsigned int port)
1916 SilcServerConnection sconn;
1918 /* Allocate connection object for hold connection specific stuff. */
1919 sconn = silc_calloc(1, sizeof(*sconn));
1920 sconn->server = server;
1921 sconn->remote_host = strdup(remote_host);
1922 sconn->remote_port = port;
1924 silc_task_register(server->timeout_queue, 0,
1925 silc_server_connect_router,
1926 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1927 SILC_TASK_PRI_NORMAL);
1930 /* Closes connection to socket connection */
1932 void silc_server_close_connection(SilcServer server,
1933 SilcSocketConnection sock)
1935 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1937 /* We won't listen for this connection anymore */
1938 silc_schedule_unset_listen_fd(sock->sock);
1940 /* Unregister all tasks */
1941 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1942 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1944 /* Close the actual connection */
1945 silc_net_close_connection(sock->sock);
1946 server->sockets[sock->sock] = NULL;
1947 silc_socket_free(sock);
1950 /* Sends disconnect message to remote connection and disconnects the
1953 void silc_server_disconnect_remote(SilcServer server,
1954 SilcSocketConnection sock,
1955 const char *fmt, ...)
1958 unsigned char buf[4096];
1963 memset(buf, 0, sizeof(buf));
1965 vsprintf(buf, fmt, ap);
1968 SILC_LOG_DEBUG(("Disconnecting remote host"));
1970 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
1972 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1973 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1974 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1977 /* Notify remote end that the conversation is over. The notify message
1978 is tried to be sent immediately. */
1979 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1980 buf, strlen(buf), TRUE);
1982 /* Mark the connection to be disconnected */
1983 SILC_SET_DISCONNECTED(sock);
1984 silc_server_close_connection(server, sock);
1989 SilcClientEntry client;
1990 } *FreeClientInternal;
1992 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
1994 FreeClientInternal i = (FreeClientInternal)context;
1996 silc_idlist_del_data(i->client);
1997 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2001 /* Frees client data and notifies about client's signoff. */
2003 void silc_server_free_client_data(SilcServer server,
2004 SilcSocketConnection sock,
2005 SilcClientEntry client,
2009 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2011 /* If there is pending outgoing data for the client then purge it
2012 to the network before removing the client entry. */
2013 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2014 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2015 server->stat.packets_sent++;
2017 if (sock->outbuf->data - sock->outbuf->head)
2018 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2020 silc_server_packet_send_real(server, sock, TRUE);
2022 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2023 SILC_UNSET_OUTBUF_PENDING(sock);
2024 silc_buffer_clear(sock->outbuf);
2027 /* Send SIGNOFF notify to routers. */
2028 if (notify && !server->standalone && server->router)
2029 silc_server_send_notify_signoff(server, server->router->connection,
2030 server->server_type == SILC_SERVER ?
2031 FALSE : TRUE, client->id,
2032 SILC_ID_CLIENT_LEN, signoff);
2034 /* Remove client from all channels */
2036 silc_server_remove_from_channels(server, NULL, client,
2037 TRUE, signoff, TRUE);
2039 silc_server_remove_from_channels(server, NULL, client,
2040 FALSE, NULL, FALSE);
2042 /* We will not delete the client entry right away. We will take it
2043 into history (for WHOWAS command) for 5 minutes */
2046 silc_task_register(server->timeout_queue, 0,
2047 silc_server_free_client_data_timeout,
2049 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2050 client->data.registered = FALSE;
2052 /* Free the client entry and everything in it */
2053 server->stat.my_clients--;
2054 server->stat.clients--;
2055 if (server->server_type == SILC_ROUTER)
2056 server->stat.cell_clients--;
2059 /* Frees user_data pointer from socket connection object. This also sends
2060 appropriate notify packets to the network to inform about leaving
2063 void silc_server_free_sock_user_data(SilcServer server,
2064 SilcSocketConnection sock)
2066 SILC_LOG_DEBUG(("Start"));
2068 switch(sock->type) {
2069 case SILC_SOCKET_TYPE_CLIENT:
2071 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2072 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2075 case SILC_SOCKET_TYPE_SERVER:
2076 case SILC_SOCKET_TYPE_ROUTER:
2078 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2080 /* Send REMOVE_ID packet to routers. */
2081 if (!server->standalone && server->router)
2082 silc_server_send_notify_server_signoff(server,
2083 server->router->connection,
2084 server->server_type ==
2086 FALSE : TRUE, user_data->id,
2087 SILC_ID_SERVER_LEN);
2089 /* Then also free all client entries that this server owns as
2090 they will become invalid now as well. */
2091 silc_server_remove_clients_by_server(server, user_data);
2093 /* If this was our primary router connection then we're lost to
2094 the outside world. */
2095 if (server->router == user_data) {
2096 server->id_entry->router = NULL;
2097 server->router = NULL;
2098 server->standalone = TRUE;
2101 /* Free the server entry */
2102 silc_idlist_del_data(user_data);
2103 silc_idlist_del_server(server->local_list, user_data);
2104 server->stat.my_servers--;
2105 server->stat.servers--;
2106 if (server->server_type == SILC_ROUTER)
2107 server->stat.cell_servers--;
2112 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2114 silc_idlist_del_data(user_data);
2115 silc_free(user_data);
2120 sock->user_data = NULL;
2123 /* This function is used to remove all client entries by the server `entry'.
2124 This is called when the connection is lost to the server. In this case
2125 we must invalidate all the client entries owned by the server `entry'. */
2127 int silc_server_remove_clients_by_server(SilcServer server,
2128 SilcServerEntry entry)
2130 SilcIDCacheList list = NULL;
2131 SilcIDCacheEntry id_cache = NULL;
2132 SilcClientEntry client = NULL;
2134 SILC_LOG_DEBUG(("Start"));
2136 if (silc_idcache_find_by_id(server->local_list->clients,
2137 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2139 if (silc_idcache_list_first(list, &id_cache)) {
2141 client = (SilcClientEntry)id_cache->context;
2143 if (client->router != entry) {
2144 if (!silc_idcache_list_next(list, &id_cache))
2150 /* Remove the client entry */
2151 silc_server_remove_from_channels(server, NULL, client, TRUE,
2153 silc_idlist_del_client(server->local_list, client);
2155 if (!silc_idcache_list_next(list, &id_cache))
2159 silc_idcache_list_free(list);
2162 if (silc_idcache_find_by_id(server->global_list->clients,
2163 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2165 if (silc_idcache_list_first(list, &id_cache)) {
2167 client = (SilcClientEntry)id_cache->context;
2169 if (client->router != entry) {
2170 if (!silc_idcache_list_next(list, &id_cache))
2176 /* Remove the client entry */
2177 silc_server_remove_from_channels(server, NULL, client, TRUE,
2179 silc_idlist_del_client(server->global_list, client);
2181 if (!silc_idcache_list_next(list, &id_cache))
2185 silc_idcache_list_free(list);
2191 /* Checks whether given channel has global users. If it does this returns
2192 TRUE and FALSE if there is only locally connected clients on the channel. */
2194 int silc_server_channel_has_global(SilcChannelEntry channel)
2196 SilcChannelClientEntry chl;
2198 silc_list_start(channel->user_list);
2199 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2200 if (chl->client->router)
2207 /* Checks whether given channel has locally connected users. If it does this
2208 returns TRUE and FALSE if there is not one locally connected client. */
2210 int silc_server_channel_has_local(SilcChannelEntry channel)
2212 SilcChannelClientEntry chl;
2214 silc_list_start(channel->user_list);
2215 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2216 if (!chl->client->router)
2223 /* Removes client from all channels it has joined. This is used when client
2224 connection is disconnected. If the client on a channel is last, the
2225 channel is removed as well. This sends the SIGNOFF notify types. */
2227 void silc_server_remove_from_channels(SilcServer server,
2228 SilcSocketConnection sock,
2229 SilcClientEntry client,
2231 char *signoff_message,
2234 SilcChannelEntry channel;
2235 SilcChannelClientEntry chl;
2238 SILC_LOG_DEBUG(("Start"));
2240 if (!client || !client->id)
2243 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2245 /* Remove the client from all channels. The client is removed from
2246 the channels' user list. */
2247 silc_list_start(client->channels);
2248 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2249 channel = chl->channel;
2251 /* Remove channel from client's channel list */
2252 silc_list_del(client->channels, chl);
2254 /* Remove channel if there is no users anymore */
2255 if (server->server_type == SILC_ROUTER &&
2256 silc_list_count(channel->user_list) < 2) {
2257 if (!silc_idlist_del_channel(server->local_list, channel))
2258 silc_idlist_del_channel(server->global_list, channel);
2259 server->stat.my_channels--;
2263 /* Remove client from channel's client list */
2264 silc_list_del(channel->user_list, chl);
2266 server->stat.my_chanclients--;
2268 /* If there is no global users on the channel anymore mark the channel
2269 as local channel. */
2270 if (server->server_type == SILC_SERVER &&
2271 !silc_server_channel_has_global(channel))
2272 channel->global_users = FALSE;
2274 /* If there is not at least one local user on the channel then we don't
2275 need the channel entry anymore, we can remove it safely. */
2276 if (server->server_type == SILC_SERVER &&
2277 !silc_server_channel_has_local(channel)) {
2278 /* Notify about leaving client if this channel has global users. */
2279 if (notify && channel->global_users)
2280 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2281 SILC_NOTIFY_TYPE_SIGNOFF,
2282 signoff_message ? 2 : 1,
2283 clidp->data, clidp->len,
2284 signoff_message, signoff_message ?
2285 strlen(signoff_message) : 0);
2287 if (!silc_idlist_del_channel(server->local_list, channel))
2288 silc_idlist_del_channel(server->global_list, channel);
2289 server->stat.my_channels--;
2293 /* Send notify to channel about client leaving SILC and thus
2294 the entire channel. */
2296 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2297 SILC_NOTIFY_TYPE_SIGNOFF,
2298 signoff_message ? 2 : 1,
2299 clidp->data, clidp->len,
2300 signoff_message, signoff_message ?
2301 strlen(signoff_message) : 0);
2303 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2304 /* Re-generate channel key */
2305 silc_server_create_channel_key(server, channel, 0);
2307 /* Send the channel key to the channel. The key of course is not sent
2308 to the client who was removed f rom the channel. */
2309 silc_server_send_channel_key(server, client->connection, channel,
2310 server->server_type == SILC_ROUTER ?
2311 FALSE : !server->standalone);
2315 silc_buffer_free(clidp);
2318 /* Removes client from one channel. This is used for example when client
2319 calls LEAVE command to remove itself from the channel. Returns TRUE
2320 if channel still exists and FALSE if the channel is removed when
2321 last client leaves the channel. If `notify' is FALSE notify messages
2324 int silc_server_remove_from_one_channel(SilcServer server,
2325 SilcSocketConnection sock,
2326 SilcChannelEntry channel,
2327 SilcClientEntry client,
2330 SilcChannelEntry ch;
2331 SilcChannelClientEntry chl;
2334 SILC_LOG_DEBUG(("Start"));
2336 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2338 /* Remove the client from the channel. The client is removed from
2339 the channel's user list. */
2340 silc_list_start(client->channels);
2341 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2342 if (chl->channel != channel)
2347 /* Remove channel from client's channel list */
2348 silc_list_del(client->channels, chl);
2350 /* Remove channel if there is no users anymore */
2351 if (server->server_type == SILC_ROUTER &&
2352 silc_list_count(channel->user_list) < 2) {
2353 if (!silc_idlist_del_channel(server->local_list, channel))
2354 silc_idlist_del_channel(server->global_list, channel);
2355 silc_buffer_free(clidp);
2356 server->stat.my_channels--;
2360 /* Remove client from channel's client list */
2361 silc_list_del(channel->user_list, chl);
2363 server->stat.my_chanclients--;
2365 /* If there is no global users on the channel anymore mark the channel
2366 as local channel. */
2367 if (server->server_type == SILC_SERVER &&
2368 !silc_server_channel_has_global(channel))
2369 channel->global_users = FALSE;
2371 /* If there is not at least one local user on the channel then we don't
2372 need the channel entry anymore, we can remove it safely. */
2373 if (server->server_type == SILC_SERVER &&
2374 !silc_server_channel_has_local(channel)) {
2375 /* Notify about leaving client if this channel has global users. */
2376 if (notify && channel->global_users)
2377 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2378 SILC_NOTIFY_TYPE_LEAVE, 1,
2379 clidp->data, clidp->len);
2381 if (!silc_idlist_del_channel(server->local_list, channel))
2382 silc_idlist_del_channel(server->global_list, channel);
2383 silc_buffer_free(clidp);
2384 server->stat.my_channels--;
2388 /* Send notify to channel about client leaving the channel */
2390 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2391 SILC_NOTIFY_TYPE_LEAVE, 1,
2392 clidp->data, clidp->len);
2396 silc_buffer_free(clidp);
2400 /* Returns TRUE if the given client is on the channel. FALSE if not.
2401 This works because we assure that the user list on the channel is
2402 always in up to date thus we can only check the channel list from
2403 `client' which is faster than checking the user list from `channel'. */
2405 int silc_server_client_on_channel(SilcClientEntry client,
2406 SilcChannelEntry channel)
2408 SilcChannelClientEntry chl;
2410 if (!client || !channel)
2413 silc_list_start(client->channels);
2414 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2415 if (chl->channel == channel)
2421 /* Timeout callback. This is called if connection is idle or for some
2422 other reason is not responding within some period of time. This
2423 disconnects the remote end. */
2425 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2427 SilcServer server = (SilcServer)context;
2428 SilcSocketConnection sock = server->sockets[fd];
2433 if (sock->user_data)
2434 silc_server_free_sock_user_data(server, sock);
2436 silc_server_disconnect_remote(server, sock,
2437 "Server closed connection: "
2438 "Connection timeout");
2441 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2442 function may be used only by router. In real SILC network all channels
2443 are created by routers thus this function is never used by normal
2446 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2447 SilcServerID *router_id,
2453 SilcChannelID *channel_id;
2454 SilcChannelEntry entry;
2458 SILC_LOG_DEBUG(("Creating new channel"));
2461 cipher = "aes-256-cbc";
2463 hmac = "hmac-sha1-96";
2465 /* Allocate cipher */
2466 if (!silc_cipher_alloc(cipher, &key))
2470 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2471 silc_cipher_free(key);
2475 channel_name = strdup(channel_name);
2477 /* Create the channel */
2478 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2479 entry = silc_idlist_add_channel(server->local_list, channel_name,
2480 SILC_CHANNEL_MODE_NONE, channel_id,
2481 NULL, key, newhmac);
2483 silc_free(channel_name);
2487 entry->cipher = strdup(cipher);
2488 entry->hmac_name = strdup(hmac);
2490 /* Now create the actual key material */
2491 silc_server_create_channel_key(server, entry,
2492 silc_cipher_get_key_len(key) / 8);
2494 /* Notify other routers about the new channel. We send the packet
2495 to our primary route. */
2496 if (broadcast && server->standalone == FALSE)
2497 silc_server_send_new_channel(server, server->router->connection, TRUE,
2498 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2501 server->stat.my_channels++;
2506 /* Same as above but creates the channel with Channel ID `channel_id. */
2509 silc_server_create_new_channel_with_id(SilcServer server,
2513 SilcChannelID *channel_id,
2516 SilcChannelEntry entry;
2520 SILC_LOG_DEBUG(("Creating new channel"));
2523 cipher = "aes-256-cbc";
2525 hmac = "hmac-sha1-96";
2527 /* Allocate cipher */
2528 if (!silc_cipher_alloc(cipher, &key))
2532 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2533 silc_cipher_free(key);
2537 channel_name = strdup(channel_name);
2539 /* Create the channel */
2540 entry = silc_idlist_add_channel(server->local_list, channel_name,
2541 SILC_CHANNEL_MODE_NONE, channel_id,
2542 NULL, key, newhmac);
2544 silc_free(channel_name);
2548 /* Now create the actual key material */
2549 silc_server_create_channel_key(server, entry,
2550 silc_cipher_get_key_len(key) / 8);
2552 /* Notify other routers about the new channel. We send the packet
2553 to our primary route. */
2554 if (broadcast && server->standalone == FALSE)
2555 silc_server_send_new_channel(server, server->router->connection, TRUE,
2556 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2559 server->stat.my_channels++;
2564 /* Generates new channel key. This is used to create the initial channel key
2565 but also to re-generate new key for channel. If `key_len' is provided
2566 it is the bytes of the key length. */
2568 void silc_server_create_channel_key(SilcServer server,
2569 SilcChannelEntry channel,
2570 unsigned int key_len)
2573 unsigned char channel_key[32], hash[32];
2576 SILC_LOG_DEBUG(("Generating channel key"));
2578 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2579 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2583 if (!channel->channel_key)
2584 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2589 else if (channel->key_len)
2590 len = channel->key_len / 8;
2592 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2594 /* Create channel key */
2595 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2598 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2600 /* Remove old key if exists */
2602 memset(channel->key, 0, channel->key_len / 8);
2603 silc_free(channel->key);
2607 channel->key_len = len * 8;
2608 channel->key = silc_calloc(len, sizeof(*channel->key));
2609 memcpy(channel->key, channel_key, len);
2610 memset(channel_key, 0, sizeof(channel_key));
2612 /* Generate HMAC key from the channel key data and set it */
2614 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2615 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2616 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2617 memset(hash, 0, sizeof(hash));
2620 /* Saves the channel key found in the encoded `key_payload' buffer. This
2621 function is used when we receive Channel Key Payload and also when we're
2622 processing JOIN command reply. Returns entry to the channel. */
2624 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2625 SilcBuffer key_payload,
2626 SilcChannelEntry channel)
2628 SilcChannelKeyPayload payload = NULL;
2629 SilcChannelID *id = NULL;
2630 unsigned char *tmp, hash[32];
2631 unsigned int tmp_len;
2634 /* Decode channel key payload */
2635 payload = silc_channel_key_payload_parse(key_payload);
2637 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2642 /* Get the channel entry */
2645 /* Get channel ID */
2646 tmp = silc_channel_key_get_id(payload, &tmp_len);
2647 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2653 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2655 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2657 SILC_LOG_ERROR(("Received key for non-existent channel"));
2663 tmp = silc_channel_key_get_key(payload, &tmp_len);
2669 cipher = silc_channel_key_get_cipher(payload, NULL);
2675 /* Remove old key if exists */
2677 memset(channel->key, 0, channel->key_len / 8);
2678 silc_free(channel->key);
2679 silc_cipher_free(channel->channel_key);
2682 /* Create new cipher */
2683 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2688 if (channel->cipher)
2689 silc_free(channel->cipher);
2690 channel->cipher = strdup(cipher);
2693 channel->key_len = tmp_len * 8;
2694 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2695 memcpy(channel->key, tmp, tmp_len);
2696 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2698 /* Generate HMAC key from the channel key data and set it */
2700 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2701 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2702 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2704 memset(hash, 0, sizeof(hash));
2705 memset(tmp, 0, tmp_len);
2711 silc_channel_key_payload_free(payload);
2716 /* Heartbeat callback. This function is set as argument for the
2717 silc_socket_set_heartbeat function. The library will call this function
2718 at the set time interval. */
2720 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2723 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2725 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2728 /* Send the heartbeat */
2729 silc_server_send_heartbeat(hb->server, sock);
2732 /* Returns assembled of all servers in the given ID list. The packet's
2733 form is dictated by the New ID payload. */
2735 static void silc_server_announce_get_servers(SilcServer server,
2737 SilcBuffer *servers)
2739 SilcIDCacheList list;
2740 SilcIDCacheEntry id_cache;
2741 SilcServerEntry entry;
2744 /* Go through all clients in the list */
2745 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2746 SILC_ID_SERVER, &list)) {
2747 if (silc_idcache_list_first(list, &id_cache)) {
2749 entry = (SilcServerEntry)id_cache->context;
2751 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2753 *servers = silc_buffer_realloc(*servers,
2755 (*servers)->truelen + idp->len :
2757 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2758 silc_buffer_put(*servers, idp->data, idp->len);
2759 silc_buffer_pull(*servers, idp->len);
2760 silc_buffer_free(idp);
2762 if (!silc_idcache_list_next(list, &id_cache))
2767 silc_idcache_list_free(list);
2771 /* This function is used by router to announce existing servers to our
2772 primary router when we've connected to it. */
2774 void silc_server_announce_servers(SilcServer server)
2776 SilcBuffer servers = NULL;
2778 SILC_LOG_DEBUG(("Announcing servers"));
2780 /* Get servers in local list */
2781 silc_server_announce_get_servers(server, server->local_list, &servers);
2783 /* Get servers in global list */
2784 silc_server_announce_get_servers(server, server->global_list, &servers);
2787 silc_buffer_push(servers, servers->data - servers->head);
2788 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2790 /* Send the packet */
2791 silc_server_packet_send(server, server->router->connection,
2792 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2793 servers->data, servers->len, TRUE);
2795 silc_buffer_free(servers);
2799 /* Returns assembled packet of all clients in the given ID list. The
2800 packet's form is dictated by the New ID Payload. */
2802 static void silc_server_announce_get_clients(SilcServer server,
2804 SilcBuffer *clients)
2806 SilcIDCacheList list;
2807 SilcIDCacheEntry id_cache;
2808 SilcClientEntry client;
2811 /* Go through all clients in the list */
2812 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2813 SILC_ID_CLIENT, &list)) {
2814 if (silc_idcache_list_first(list, &id_cache)) {
2816 client = (SilcClientEntry)id_cache->context;
2818 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2820 *clients = silc_buffer_realloc(*clients,
2822 (*clients)->truelen + idp->len :
2824 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2825 silc_buffer_put(*clients, idp->data, idp->len);
2826 silc_buffer_pull(*clients, idp->len);
2827 silc_buffer_free(idp);
2829 if (!silc_idcache_list_next(list, &id_cache))
2834 silc_idcache_list_free(list);
2838 /* This function is used to announce our existing clients to our router
2839 when we've connected to it. */
2841 void silc_server_announce_clients(SilcServer server)
2843 SilcBuffer clients = NULL;
2845 SILC_LOG_DEBUG(("Announcing clients"));
2847 /* Get clients in local list */
2848 silc_server_announce_get_clients(server, server->local_list,
2851 /* As router we announce our global list as well */
2852 if (server->server_type == SILC_ROUTER)
2853 silc_server_announce_get_clients(server, server->global_list,
2857 silc_buffer_push(clients, clients->data - clients->head);
2858 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2860 /* Send the packet */
2861 silc_server_packet_send(server, server->router->connection,
2862 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2863 clients->data, clients->len, TRUE);
2865 silc_buffer_free(clients);
2870 silc_server_announce_encode_join(unsigned int argc, ...)
2875 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
2878 /* Returns assembled packets for all channels and users on those channels
2879 from the given ID List. The packets are in the form dictated by the
2880 New Channel and New Channel User payloads. */
2882 static void silc_server_announce_get_channels(SilcServer server,
2884 SilcBuffer *channels,
2885 SilcBuffer *channel_users)
2887 SilcIDCacheList list;
2888 SilcIDCacheEntry id_cache;
2889 SilcChannelEntry channel;
2890 SilcChannelClientEntry chl;
2893 unsigned short name_len;
2896 /* Go through all channels in the list */
2897 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2898 SILC_ID_CHANNEL, &list)) {
2899 if (silc_idcache_list_first(list, &id_cache)) {
2901 channel = (SilcChannelEntry)id_cache->context;
2903 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2904 name_len = strlen(channel->channel_name);
2906 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
2908 silc_buffer_realloc(*channels,
2909 (*channels ? (*channels)->truelen + len : len));
2910 silc_buffer_pull_tail(*channels,
2911 ((*channels)->end - (*channels)->data));
2912 silc_buffer_format(*channels,
2913 SILC_STR_UI_SHORT(name_len),
2914 SILC_STR_UI_XNSTRING(channel->channel_name,
2916 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2917 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2920 silc_buffer_pull(*channels, len);
2922 /* Now find all users on the channel */
2923 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
2924 silc_list_start(channel->user_list);
2925 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2929 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
2931 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
2932 chidp->data, chidp->len);
2935 silc_buffer_realloc(*channel_users,
2937 (*channel_users)->truelen + len : len));
2938 silc_buffer_pull_tail(*channel_users,
2939 ((*channel_users)->end -
2940 (*channel_users)->data));
2942 silc_buffer_put(*channel_users, tmp->data, tmp->len);
2943 silc_buffer_pull(*channel_users, len);
2944 silc_buffer_free(clidp);
2945 silc_buffer_free(tmp);
2947 silc_buffer_free(chidp);
2951 if (!silc_idcache_list_next(list, &id_cache))
2956 silc_idcache_list_free(list);
2960 /* This function is used to announce our existing channels to our router
2961 when we've connected to it. This also announces the users on the
2962 channels to the router. */
2964 void silc_server_announce_channels(SilcServer server)
2966 SilcBuffer channels = NULL, channel_users = NULL;
2968 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2970 /* Get channels and channel users in local list */
2971 silc_server_announce_get_channels(server, server->local_list,
2972 &channels, &channel_users);
2974 /* Get channels and channel users in global list */
2975 silc_server_announce_get_channels(server, server->global_list,
2976 &channels, &channel_users);
2979 silc_buffer_push(channels, channels->data - channels->head);
2980 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
2982 /* Send the packet */
2983 silc_server_packet_send(server, server->router->connection,
2984 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
2985 channels->data, channels->len,
2988 silc_buffer_free(channels);
2991 if (channel_users) {
2992 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
2993 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
2994 channel_users->len);
2996 /* Send the packet */
2997 silc_server_packet_send(server, server->router->connection,
2998 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
2999 channel_users->data, channel_users->len,
3002 silc_buffer_free(channel_users);
3006 /* Failure timeout callback. If this is called then we will immediately
3007 process the received failure. We always process the failure with timeout
3008 since we do not want to blindly trust to received failure packets.
3009 This won't be called (the timeout is cancelled) if the failure was
3010 bogus (it is bogus if remote does not close the connection after sending
3013 SILC_TASK_CALLBACK(silc_server_failure_callback)
3015 SilcServerFailureContext f = (SilcServerFailureContext)context;
3017 if (f->sock->protocol) {
3018 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3019 f->sock->protocol->execute(f->server->timeout_queue, 0,
3020 f->sock->protocol, f->sock->sock, 0, 0);
3026 /* Assembles user list and users mode list from the `channel'. */
3028 void silc_server_get_users_on_channel(SilcServer server,
3029 SilcChannelEntry channel,
3030 SilcBuffer *user_list,
3031 SilcBuffer *mode_list,
3032 unsigned int *user_count)
3034 SilcChannelClientEntry chl;
3035 SilcBuffer client_id_list;
3036 SilcBuffer client_mode_list;
3038 unsigned int list_count = 0;
3040 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3041 silc_list_count(channel->user_list));
3042 client_mode_list = silc_buffer_alloc(4 *
3043 silc_list_count(channel->user_list));
3044 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3045 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3046 silc_list_start(channel->user_list);
3047 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3049 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3050 silc_buffer_put(client_id_list, idp->data, idp->len);
3051 silc_buffer_pull(client_id_list, idp->len);
3052 silc_buffer_free(idp);
3054 /* Client's mode on channel */
3055 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3056 silc_buffer_pull(client_mode_list, 4);
3060 silc_buffer_push(client_id_list,
3061 client_id_list->data - client_id_list->head);
3062 silc_buffer_push(client_mode_list,
3063 client_mode_list->data - client_mode_list->head);
3065 *user_list = client_id_list;
3066 *mode_list = client_mode_list;
3067 *user_count = list_count;
3070 /* Saves users and their modes to the `channel'. */
3072 void silc_server_save_users_on_channel(SilcServer server,
3073 SilcSocketConnection sock,
3074 SilcChannelEntry channel,
3075 SilcClientID *noadd,
3076 SilcBuffer user_list,
3077 SilcBuffer mode_list,
3078 unsigned int user_count)
3082 /* Cache the received Client ID's and modes. This cache expires
3083 whenever server sends notify message to channel. It means two things;
3084 some user has joined or leaved the channel. XXX TODO! */
3085 for (i = 0; i < user_count; i++) {
3086 unsigned short idp_len;
3088 SilcClientID *client_id;
3089 SilcClientEntry client;
3092 SILC_GET16_MSB(idp_len, user_list->data + 2);
3094 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3095 silc_buffer_pull(user_list, idp_len);
3100 SILC_GET32_MSB(mode, mode_list->data);
3101 silc_buffer_pull(mode_list, 4);
3103 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3104 silc_free(client_id);
3108 /* Check if we have this client cached already. */
3109 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3112 client = silc_idlist_find_client_by_id(server->global_list,
3115 /* If router did not find such Client ID in its lists then this must
3116 be bogus client or some router in the net is buggy. */
3117 if (server->server_type == SILC_ROUTER) {
3118 silc_free(client_id);
3122 /* We don't have that client anywhere, add it. The client is added
3123 to global list since server didn't have it in the lists so it must be
3125 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3127 silc_id_dup(client_id, SILC_ID_CLIENT),
3128 sock->user_data, NULL);
3130 silc_free(client_id);
3134 client->data.registered = TRUE;
3137 silc_free(client_id);
3139 if (!silc_server_client_on_channel(client, channel)) {
3140 /* Client was not on the channel, add it. */
3141 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3142 chl->client = client;
3144 chl->channel = channel;
3145 silc_list_add(channel->user_list, chl);
3146 silc_list_add(client->channels, chl);
3151 /* Lookups route to the client indicated by `id' client ID. The connection
3152 object and internal data object is returned. Returns NULL if route
3153 could not be found to the client. If the `client_id' is specified then
3154 it is used and the `id_data' is ignored. */
3156 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3157 unsigned char *id_data,
3158 unsigned int id_len,
3159 SilcClientID *client_id,
3160 SilcIDListData *idata)
3163 SilcClientEntry client;
3165 SILC_LOG_DEBUG(("Start"));
3167 /* Decode destination Client ID */
3169 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3171 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3175 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3178 /* If the destination belongs to our server we don't have to route
3179 the packet anywhere but to send it to the local destination. */
3180 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3184 if (client && client->data.registered == FALSE)
3187 /* If we are router and the client has router then the client is in
3188 our cell but not directly connected to us. */
3189 if (server->server_type == SILC_ROUTER && client->router) {
3190 /* We are of course in this case the client's router thus the real
3191 "router" of the client is the server who owns the client. Thus
3192 we will send the packet to that server. */
3193 *idata = (SilcIDListData)client->router;
3194 return client->router->connection;
3197 /* Seems that client really is directly connected to us */
3198 *idata = (SilcIDListData)client;
3199 return client->connection;
3202 /* Destination belongs to someone not in this server. If we are normal
3203 server our action is to send the packet to our router. */
3204 if (server->server_type == SILC_SERVER && !server->standalone) {
3206 *idata = (SilcIDListData)server->router;
3207 return server->router->connection;
3210 /* We are router and we will perform route lookup for the destination
3211 and send the packet to fastest route. */
3212 if (server->server_type == SILC_ROUTER && !server->standalone) {
3213 /* Check first that the ID is valid */
3214 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3216 SilcSocketConnection dst_sock;
3218 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3221 *idata = (SilcIDListData)dst_sock->user_data;
3230 /* Encodes and returns channel list of channels the `client' has joined.
3231 Secret channels are not put to the list. */
3233 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3234 SilcClientEntry client)
3236 SilcBuffer buffer = NULL;
3237 SilcChannelEntry channel;
3238 SilcChannelClientEntry chl;
3240 unsigned short name_len;
3243 silc_list_start(client->channels);
3244 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3245 channel = chl->channel;
3247 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3250 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3251 name_len = strlen(channel->channel_name);
3253 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3254 buffer = silc_buffer_realloc(buffer,
3255 (buffer ? (buffer)->truelen + len : len));
3256 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3257 silc_buffer_format(buffer,
3258 SILC_STR_UI_SHORT(name_len),
3259 SILC_STR_UI_XNSTRING(channel->channel_name,
3261 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3262 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3263 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3265 silc_buffer_pull(buffer, len);
3270 silc_buffer_push(buffer, buffer->data - buffer->head);
3275 /* Finds client entry by Client ID and if it is not found then resolves
3276 it using WHOIS command. */
3278 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3279 SilcClientID *client_id)
3281 SilcClientEntry client;
3283 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3285 client = silc_idlist_find_client_by_id(server->global_list,
3287 if (!client && server->server_type == SILC_ROUTER)
3291 if (!client && server->standalone)
3294 if (!client || !client->nickname || !client->username) {
3295 SilcBuffer buffer, idp;
3297 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3298 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3299 ++server->cmd_ident, 1,
3300 3, idp->data, idp->len);
3301 silc_server_packet_send(server, client ? client->router->connection :
3302 server->router->connection,
3303 SILC_PACKET_COMMAND, 0,
3304 buffer->data, buffer->len, FALSE);
3305 silc_buffer_free(idp);
3306 silc_buffer_free(buffer);