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
1426 if ((packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1427 !(buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY)) ||
1428 packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1429 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1430 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1431 server->server_type == SILC_ROUTER))
1437 /* Parses whole packet, received earlier. */
1439 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1441 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1442 SilcServer server = (SilcServer)parse_ctx->context;
1443 SilcSocketConnection sock = parse_ctx->sock;
1444 SilcPacketContext *packet = parse_ctx->packet;
1447 SILC_LOG_DEBUG(("Start"));
1449 /* Decrypt the received packet */
1450 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1451 packet->buffer, packet,
1452 silc_server_packet_decrypt_check, parse_ctx);
1457 /* Parse the packet. Packet type is returned. */
1458 ret = silc_packet_parse(packet);
1460 /* Parse the packet header in special way as this is "special"
1462 ret = silc_packet_parse_special(packet);
1465 if (ret == SILC_PACKET_NONE)
1468 /* Check that the the current client ID is same as in the client's packet. */
1469 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1470 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1471 if (client && client->id) {
1472 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1473 packet->src_id_type);
1474 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1482 if (server->server_type == SILC_ROUTER) {
1483 /* Route the packet if it is not destined to us. Other ID types but
1484 server are handled separately after processing them. */
1485 if (packet->dst_id_type == SILC_ID_SERVER &&
1486 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1487 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1489 /* Route the packet to fastest route for the destination ID */
1490 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1491 packet->dst_id_type);
1494 silc_server_packet_route(server,
1495 silc_server_route_get(server, id,
1496 packet->dst_id_type),
1502 /* Broadcast packet if it is marked as broadcast packet and it is
1503 originated from router and we are router. */
1504 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1505 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1506 silc_server_packet_broadcast(server, server->router->connection, packet);
1510 /* Parse the incoming packet type */
1511 silc_server_packet_parse_type(server, sock, packet);
1514 silc_buffer_clear(sock->inbuf);
1515 silc_packet_context_free(packet);
1516 silc_free(parse_ctx);
1519 /* Parser callback called by silc_packet_receive_process. This merely
1520 registers timeout that will handle the actual parsing when appropriate. */
1522 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1524 SilcServer server = (SilcServer)parser_context->context;
1525 SilcSocketConnection sock = parser_context->sock;
1527 switch (sock->type) {
1528 case SILC_SOCKET_TYPE_CLIENT:
1529 case SILC_SOCKET_TYPE_UNKNOWN:
1530 /* Parse the packet with timeout */
1531 silc_task_register(server->timeout_queue, sock->sock,
1532 silc_server_packet_parse_real,
1533 (void *)parser_context, 0, 100000,
1535 SILC_TASK_PRI_NORMAL);
1537 case SILC_SOCKET_TYPE_SERVER:
1538 case SILC_SOCKET_TYPE_ROUTER:
1539 /* Packets from servers are parsed as soon as possible */
1540 silc_task_register(server->timeout_queue, sock->sock,
1541 silc_server_packet_parse_real,
1542 (void *)parser_context, 0, 1,
1544 SILC_TASK_PRI_NORMAL);
1551 /* Parses the packet type and calls what ever routines the packet type
1552 requires. This is done for all incoming packets. */
1554 void silc_server_packet_parse_type(SilcServer server,
1555 SilcSocketConnection sock,
1556 SilcPacketContext *packet)
1558 SilcPacketType type = packet->type;
1560 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1562 /* Parse the packet type */
1564 case SILC_PACKET_DISCONNECT:
1565 SILC_LOG_DEBUG(("Disconnect packet"));
1566 if (packet->flags & SILC_PACKET_FLAG_LIST)
1570 case SILC_PACKET_SUCCESS:
1572 * Success received for something. For now we can have only
1573 * one protocol for connection executing at once hence this
1574 * success message is for whatever protocol is executing currently.
1576 SILC_LOG_DEBUG(("Success packet"));
1577 if (packet->flags & SILC_PACKET_FLAG_LIST)
1579 if (sock->protocol) {
1580 sock->protocol->execute(server->timeout_queue, 0,
1581 sock->protocol, sock->sock, 0, 0);
1585 case SILC_PACKET_FAILURE:
1587 * Failure received for something. For now we can have only
1588 * one protocol for connection executing at once hence this
1589 * failure message is for whatever protocol is executing currently.
1591 SILC_LOG_DEBUG(("Failure packet"));
1592 if (packet->flags & SILC_PACKET_FLAG_LIST)
1594 if (sock->protocol) {
1595 SilcServerFailureContext f;
1596 f = silc_calloc(1, sizeof(*f));
1600 /* We will wait 5 seconds to process this failure packet */
1601 silc_task_register(server->timeout_queue, sock->sock,
1602 silc_server_failure_callback, (void *)f, 5, 0,
1603 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1607 case SILC_PACKET_REJECT:
1608 SILC_LOG_DEBUG(("Reject packet"));
1609 if (packet->flags & SILC_PACKET_FLAG_LIST)
1614 case SILC_PACKET_NOTIFY:
1616 * Received notify packet. Server can receive notify packets from
1617 * router. Server then relays the notify messages to clients if needed.
1619 SILC_LOG_DEBUG(("Notify packet"));
1620 if (packet->flags & SILC_PACKET_FLAG_LIST)
1621 silc_server_notify_list(server, sock, packet);
1623 silc_server_notify(server, sock, packet);
1629 case SILC_PACKET_CHANNEL_MESSAGE:
1631 * Received channel message. Channel messages are special packets
1632 * (although probably most common ones) thus they are handled
1635 SILC_LOG_DEBUG(("Channel Message packet"));
1636 if (packet->flags & SILC_PACKET_FLAG_LIST)
1638 silc_server_channel_message(server, sock, packet);
1641 case SILC_PACKET_CHANNEL_KEY:
1643 * Received key for channel. As channels are created by the router
1644 * the keys are as well. We will distribute the key to all of our
1645 * locally connected clients on the particular channel. Router
1646 * never receives this channel and thus is ignored.
1648 SILC_LOG_DEBUG(("Channel Key packet"));
1649 if (packet->flags & SILC_PACKET_FLAG_LIST)
1651 silc_server_channel_key(server, sock, packet);
1657 case SILC_PACKET_COMMAND:
1659 * Recived command. Processes the command request and allocates the
1660 * command context and calls the command.
1662 SILC_LOG_DEBUG(("Command packet"));
1663 if (packet->flags & SILC_PACKET_FLAG_LIST)
1665 silc_server_command_process(server, sock, packet);
1668 case SILC_PACKET_COMMAND_REPLY:
1670 * Received command reply packet. Received command reply to command. It
1671 * may be reply to command sent by us or reply to command sent by client
1672 * that we've routed further.
1674 SILC_LOG_DEBUG(("Command Reply packet"));
1675 if (packet->flags & SILC_PACKET_FLAG_LIST)
1677 silc_server_command_reply(server, sock, packet);
1681 * Private Message packets
1683 case SILC_PACKET_PRIVATE_MESSAGE:
1685 * Received private message packet. The packet is coming from either
1688 SILC_LOG_DEBUG(("Private Message packet"));
1689 if (packet->flags & SILC_PACKET_FLAG_LIST)
1691 silc_server_private_message(server, sock, packet);
1694 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1696 * Private message key packet.
1698 if (packet->flags & SILC_PACKET_FLAG_LIST)
1700 silc_server_private_message_key(server, sock, packet);
1704 * Key Exchange protocol packets
1706 case SILC_PACKET_KEY_EXCHANGE:
1707 SILC_LOG_DEBUG(("KE packet"));
1708 if (packet->flags & SILC_PACKET_FLAG_LIST)
1711 if (sock->protocol && sock->protocol->protocol->type
1712 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1714 SilcServerKEInternalContext *proto_ctx =
1715 (SilcServerKEInternalContext *)sock->protocol->context;
1717 proto_ctx->packet = silc_packet_context_dup(packet);
1719 /* Let the protocol handle the packet */
1720 sock->protocol->execute(server->timeout_queue, 0,
1721 sock->protocol, sock->sock, 0, 100000);
1723 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1724 "protocol active, packet dropped."));
1726 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1730 case SILC_PACKET_KEY_EXCHANGE_1:
1731 SILC_LOG_DEBUG(("KE 1 packet"));
1732 if (packet->flags & SILC_PACKET_FLAG_LIST)
1735 if (sock->protocol && sock->protocol->protocol->type
1736 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1738 SilcServerKEInternalContext *proto_ctx =
1739 (SilcServerKEInternalContext *)sock->protocol->context;
1741 if (proto_ctx->packet)
1742 silc_packet_context_free(proto_ctx->packet);
1744 proto_ctx->packet = silc_packet_context_dup(packet);
1745 proto_ctx->dest_id_type = packet->src_id_type;
1746 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1747 packet->src_id_type);
1748 if (!proto_ctx->dest_id)
1751 /* Let the protocol handle the packet */
1752 sock->protocol->execute(server->timeout_queue, 0,
1753 sock->protocol, sock->sock,
1756 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1757 "protocol active, packet dropped."));
1761 case SILC_PACKET_KEY_EXCHANGE_2:
1762 SILC_LOG_DEBUG(("KE 2 packet"));
1763 if (packet->flags & SILC_PACKET_FLAG_LIST)
1766 if (sock->protocol && sock->protocol->protocol->type
1767 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1769 SilcServerKEInternalContext *proto_ctx =
1770 (SilcServerKEInternalContext *)sock->protocol->context;
1772 if (proto_ctx->packet)
1773 silc_packet_context_free(proto_ctx->packet);
1775 proto_ctx->packet = silc_packet_context_dup(packet);
1776 proto_ctx->dest_id_type = packet->src_id_type;
1777 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1778 packet->src_id_type);
1779 if (!proto_ctx->dest_id)
1782 /* Let the protocol handle the packet */
1783 sock->protocol->execute(server->timeout_queue, 0,
1784 sock->protocol, sock->sock,
1787 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1788 "protocol active, packet dropped."));
1792 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1794 * Connection authentication request packet. When we receive this packet
1795 * we will send to the other end information about our mandatory
1796 * authentication method for the connection. This packet maybe received
1799 SILC_LOG_DEBUG(("Connection authentication request packet"));
1800 if (packet->flags & SILC_PACKET_FLAG_LIST)
1802 silc_server_connection_auth_request(server, sock, packet);
1806 * Connection Authentication protocol packets
1808 case SILC_PACKET_CONNECTION_AUTH:
1809 /* Start of the authentication protocol. We receive here the
1810 authentication data and will verify it. */
1811 SILC_LOG_DEBUG(("Connection auth packet"));
1812 if (packet->flags & SILC_PACKET_FLAG_LIST)
1815 if (sock->protocol && sock->protocol->protocol->type
1816 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1818 SilcServerConnAuthInternalContext *proto_ctx =
1819 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1821 proto_ctx->packet = silc_packet_context_dup(packet);
1823 /* Let the protocol handle the packet */
1824 sock->protocol->execute(server->timeout_queue, 0,
1825 sock->protocol, sock->sock, 0, 0);
1827 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1828 "protocol active, packet dropped."));
1832 case SILC_PACKET_NEW_ID:
1834 * Received New ID packet. This includes some new ID that has been
1835 * created. It may be for client, server or channel. This is the way
1836 * to distribute information about new registered entities in the
1839 SILC_LOG_DEBUG(("New ID packet"));
1840 if (packet->flags & SILC_PACKET_FLAG_LIST)
1841 silc_server_new_id_list(server, sock, packet);
1843 silc_server_new_id(server, sock, packet);
1846 case SILC_PACKET_NEW_CLIENT:
1848 * Received new client packet. This includes client information that
1849 * we will use to create initial client ID. After creating new
1850 * ID we will send it to the client.
1852 SILC_LOG_DEBUG(("New Client packet"));
1853 if (packet->flags & SILC_PACKET_FLAG_LIST)
1855 silc_server_new_client(server, sock, packet);
1858 case SILC_PACKET_NEW_SERVER:
1860 * Received new server packet. This includes Server ID and some other
1861 * information that we may save. This is received after server has
1864 SILC_LOG_DEBUG(("New Server packet"));
1865 if (packet->flags & SILC_PACKET_FLAG_LIST)
1867 silc_server_new_server(server, sock, packet);
1870 case SILC_PACKET_NEW_CHANNEL:
1872 * Received new channel packet. Information about new channel in the
1873 * network are distributed using this packet.
1875 SILC_LOG_DEBUG(("New Channel packet"));
1876 if (packet->flags & SILC_PACKET_FLAG_LIST)
1877 silc_server_new_channel_list(server, sock, packet);
1879 silc_server_new_channel(server, sock, packet);
1882 case SILC_PACKET_HEARTBEAT:
1884 * Received heartbeat.
1886 SILC_LOG_DEBUG(("Heartbeat packet"));
1887 if (packet->flags & SILC_PACKET_FLAG_LIST)
1891 case SILC_PACKET_KEY_AGREEMENT:
1893 * Received heartbeat.
1895 SILC_LOG_DEBUG(("Key agreement packet"));
1896 if (packet->flags & SILC_PACKET_FLAG_LIST)
1898 silc_server_key_agreement(server, sock, packet);
1902 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1908 /* Creates connection to a remote router. */
1910 void silc_server_create_connection(SilcServer server,
1911 char *remote_host, unsigned int port)
1913 SilcServerConnection sconn;
1915 /* Allocate connection object for hold connection specific stuff. */
1916 sconn = silc_calloc(1, sizeof(*sconn));
1917 sconn->server = server;
1918 sconn->remote_host = strdup(remote_host);
1919 sconn->remote_port = port;
1921 silc_task_register(server->timeout_queue, 0,
1922 silc_server_connect_router,
1923 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1924 SILC_TASK_PRI_NORMAL);
1927 /* Closes connection to socket connection */
1929 void silc_server_close_connection(SilcServer server,
1930 SilcSocketConnection sock)
1932 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1934 /* We won't listen for this connection anymore */
1935 silc_schedule_unset_listen_fd(sock->sock);
1937 /* Unregister all tasks */
1938 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1939 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1941 /* Close the actual connection */
1942 silc_net_close_connection(sock->sock);
1943 server->sockets[sock->sock] = NULL;
1944 silc_socket_free(sock);
1947 /* Sends disconnect message to remote connection and disconnects the
1950 void silc_server_disconnect_remote(SilcServer server,
1951 SilcSocketConnection sock,
1952 const char *fmt, ...)
1955 unsigned char buf[4096];
1960 memset(buf, 0, sizeof(buf));
1962 vsprintf(buf, fmt, ap);
1965 SILC_LOG_DEBUG(("Disconnecting remote host"));
1967 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
1969 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1970 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1971 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1974 /* Notify remote end that the conversation is over. The notify message
1975 is tried to be sent immediately. */
1976 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1977 buf, strlen(buf), TRUE);
1979 /* Mark the connection to be disconnected */
1980 SILC_SET_DISCONNECTED(sock);
1981 silc_server_close_connection(server, sock);
1986 SilcClientEntry client;
1987 } *FreeClientInternal;
1989 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
1991 FreeClientInternal i = (FreeClientInternal)context;
1993 silc_idlist_del_data(i->client);
1994 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
1998 /* Frees client data and notifies about client's signoff. */
2000 void silc_server_free_client_data(SilcServer server,
2001 SilcSocketConnection sock,
2002 SilcClientEntry client,
2006 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2008 /* If there is pending outgoing data for the client then purge it
2009 to the network before removing the client entry. */
2010 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2011 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2012 server->stat.packets_sent++;
2014 if (sock->outbuf->data - sock->outbuf->head)
2015 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2017 silc_server_packet_send_real(server, sock, TRUE);
2019 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2020 SILC_UNSET_OUTBUF_PENDING(sock);
2021 silc_buffer_clear(sock->outbuf);
2024 /* Send SIGNOFF notify to routers. */
2025 if (notify && !server->standalone && server->router)
2026 silc_server_send_notify_signoff(server, server->router->connection,
2027 server->server_type == SILC_SERVER ?
2028 FALSE : TRUE, client->id,
2029 SILC_ID_CLIENT_LEN, signoff);
2031 /* Remove client from all channels */
2033 silc_server_remove_from_channels(server, NULL, client,
2034 TRUE, signoff, TRUE);
2036 silc_server_remove_from_channels(server, NULL, client,
2037 FALSE, NULL, FALSE);
2039 /* We will not delete the client entry right away. We will take it
2040 into history (for WHOWAS command) for 5 minutes */
2043 silc_task_register(server->timeout_queue, 0,
2044 silc_server_free_client_data_timeout,
2046 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2047 client->data.registered = FALSE;
2049 /* Free the client entry and everything in it */
2050 server->stat.my_clients--;
2051 server->stat.clients--;
2052 if (server->server_type == SILC_ROUTER)
2053 server->stat.cell_clients--;
2056 /* Frees user_data pointer from socket connection object. This also sends
2057 appropriate notify packets to the network to inform about leaving
2060 void silc_server_free_sock_user_data(SilcServer server,
2061 SilcSocketConnection sock)
2063 SILC_LOG_DEBUG(("Start"));
2065 switch(sock->type) {
2066 case SILC_SOCKET_TYPE_CLIENT:
2068 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2069 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2072 case SILC_SOCKET_TYPE_SERVER:
2073 case SILC_SOCKET_TYPE_ROUTER:
2075 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2077 /* Send REMOVE_ID packet to routers. */
2078 if (!server->standalone && server->router)
2079 silc_server_send_notify_server_signoff(server,
2080 server->router->connection,
2081 server->server_type ==
2083 FALSE : TRUE, user_data->id,
2084 SILC_ID_SERVER_LEN);
2086 /* Then also free all client entries that this server owns as
2087 they will become invalid now as well. */
2088 silc_server_remove_clients_by_server(server, user_data);
2090 /* If this was our primary router connection then we're lost to
2091 the outside world. */
2092 if (server->router == user_data) {
2093 server->id_entry->router = NULL;
2094 server->router = NULL;
2095 server->standalone = TRUE;
2098 /* Free the server entry */
2099 silc_idlist_del_data(user_data);
2100 silc_idlist_del_server(server->local_list, user_data);
2101 server->stat.my_servers--;
2102 server->stat.servers--;
2103 if (server->server_type == SILC_ROUTER)
2104 server->stat.cell_servers--;
2109 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2111 silc_idlist_del_data(user_data);
2112 silc_free(user_data);
2117 sock->user_data = NULL;
2120 /* This function is used to remove all client entries by the server `entry'.
2121 This is called when the connection is lost to the server. In this case
2122 we must invalidate all the client entries owned by the server `entry'. */
2124 int silc_server_remove_clients_by_server(SilcServer server,
2125 SilcServerEntry entry)
2127 SilcIDCacheList list = NULL;
2128 SilcIDCacheEntry id_cache = NULL;
2129 SilcClientEntry client = NULL;
2131 SILC_LOG_DEBUG(("Start"));
2133 if (silc_idcache_find_by_id(server->local_list->clients,
2134 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2136 if (silc_idcache_list_first(list, &id_cache)) {
2138 client = (SilcClientEntry)id_cache->context;
2140 if (client->router != entry) {
2141 if (!silc_idcache_list_next(list, &id_cache))
2147 /* Remove the client entry */
2148 silc_server_remove_from_channels(server, NULL, client, TRUE,
2150 silc_idlist_del_client(server->local_list, client);
2152 if (!silc_idcache_list_next(list, &id_cache))
2156 silc_idcache_list_free(list);
2159 if (silc_idcache_find_by_id(server->global_list->clients,
2160 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2162 if (silc_idcache_list_first(list, &id_cache)) {
2164 client = (SilcClientEntry)id_cache->context;
2166 if (client->router != entry) {
2167 if (!silc_idcache_list_next(list, &id_cache))
2173 /* Remove the client entry */
2174 silc_server_remove_from_channels(server, NULL, client, TRUE,
2176 silc_idlist_del_client(server->global_list, client);
2178 if (!silc_idcache_list_next(list, &id_cache))
2182 silc_idcache_list_free(list);
2188 /* Checks whether given channel has global users. If it does this returns
2189 TRUE and FALSE if there is only locally connected clients on the channel. */
2191 int silc_server_channel_has_global(SilcChannelEntry channel)
2193 SilcChannelClientEntry chl;
2195 silc_list_start(channel->user_list);
2196 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2197 if (chl->client->router)
2204 /* Checks whether given channel has locally connected users. If it does this
2205 returns TRUE and FALSE if there is not one locally connected client. */
2207 int silc_server_channel_has_local(SilcChannelEntry channel)
2209 SilcChannelClientEntry chl;
2211 silc_list_start(channel->user_list);
2212 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2213 if (!chl->client->router)
2220 /* Removes client from all channels it has joined. This is used when client
2221 connection is disconnected. If the client on a channel is last, the
2222 channel is removed as well. This sends the SIGNOFF notify types. */
2224 void silc_server_remove_from_channels(SilcServer server,
2225 SilcSocketConnection sock,
2226 SilcClientEntry client,
2228 char *signoff_message,
2231 SilcChannelEntry channel;
2232 SilcChannelClientEntry chl;
2235 SILC_LOG_DEBUG(("Start"));
2237 if (!client || !client->id)
2240 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2242 /* Remove the client from all channels. The client is removed from
2243 the channels' user list. */
2244 silc_list_start(client->channels);
2245 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2246 channel = chl->channel;
2248 /* Remove channel from client's channel list */
2249 silc_list_del(client->channels, chl);
2251 /* Remove channel if there is no users anymore */
2252 if (server->server_type == SILC_ROUTER &&
2253 silc_list_count(channel->user_list) < 2) {
2254 if (!silc_idlist_del_channel(server->local_list, channel))
2255 silc_idlist_del_channel(server->global_list, channel);
2256 server->stat.my_channels--;
2260 /* Remove client from channel's client list */
2261 silc_list_del(channel->user_list, chl);
2263 server->stat.my_chanclients--;
2265 /* If there is no global users on the channel anymore mark the channel
2266 as local channel. */
2267 if (server->server_type == SILC_SERVER &&
2268 !silc_server_channel_has_global(channel))
2269 channel->global_users = FALSE;
2271 /* If there is not at least one local user on the channel then we don't
2272 need the channel entry anymore, we can remove it safely. */
2273 if (server->server_type == SILC_SERVER &&
2274 !silc_server_channel_has_local(channel)) {
2275 /* Notify about leaving client if this channel has global users. */
2276 if (notify && channel->global_users)
2277 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2278 SILC_NOTIFY_TYPE_SIGNOFF,
2279 signoff_message ? 2 : 1,
2280 clidp->data, clidp->len,
2281 signoff_message, signoff_message ?
2282 strlen(signoff_message) : 0);
2284 if (!silc_idlist_del_channel(server->local_list, channel))
2285 silc_idlist_del_channel(server->global_list, channel);
2286 server->stat.my_channels--;
2290 /* Send notify to channel about client leaving SILC and thus
2291 the entire channel. */
2293 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2294 SILC_NOTIFY_TYPE_SIGNOFF,
2295 signoff_message ? 2 : 1,
2296 clidp->data, clidp->len,
2297 signoff_message, signoff_message ?
2298 strlen(signoff_message) : 0);
2301 /* Re-generate channel key */
2302 silc_server_create_channel_key(server, channel, 0);
2304 /* Send the channel key to the channel. The key of course is not sent
2305 to the client who was removed f rom the channel. */
2306 silc_server_send_channel_key(server, client->connection, channel,
2307 server->server_type == SILC_ROUTER ?
2308 FALSE : !server->standalone);
2312 silc_buffer_free(clidp);
2315 /* Removes client from one channel. This is used for example when client
2316 calls LEAVE command to remove itself from the channel. Returns TRUE
2317 if channel still exists and FALSE if the channel is removed when
2318 last client leaves the channel. If `notify' is FALSE notify messages
2321 int silc_server_remove_from_one_channel(SilcServer server,
2322 SilcSocketConnection sock,
2323 SilcChannelEntry channel,
2324 SilcClientEntry client,
2327 SilcChannelEntry ch;
2328 SilcChannelClientEntry chl;
2331 SILC_LOG_DEBUG(("Start"));
2333 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2335 /* Remove the client from the channel. The client is removed from
2336 the channel's user list. */
2337 silc_list_start(client->channels);
2338 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2339 if (chl->channel != channel)
2344 /* Remove channel from client's channel list */
2345 silc_list_del(client->channels, chl);
2347 /* Remove channel if there is no users anymore */
2348 if (server->server_type == SILC_ROUTER &&
2349 silc_list_count(channel->user_list) < 2) {
2350 if (!silc_idlist_del_channel(server->local_list, channel))
2351 silc_idlist_del_channel(server->global_list, channel);
2352 silc_buffer_free(clidp);
2353 server->stat.my_channels--;
2357 /* Remove client from channel's client list */
2358 silc_list_del(channel->user_list, chl);
2360 server->stat.my_chanclients--;
2362 /* If there is no global users on the channel anymore mark the channel
2363 as local channel. */
2364 if (server->server_type == SILC_SERVER &&
2365 !silc_server_channel_has_global(channel))
2366 channel->global_users = FALSE;
2368 /* If there is not at least one local user on the channel then we don't
2369 need the channel entry anymore, we can remove it safely. */
2370 if (server->server_type == SILC_SERVER &&
2371 !silc_server_channel_has_local(channel)) {
2372 /* Notify about leaving client if this channel has global users. */
2373 if (notify && channel->global_users)
2374 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2375 SILC_NOTIFY_TYPE_LEAVE, 1,
2376 clidp->data, clidp->len);
2378 if (!silc_idlist_del_channel(server->local_list, channel))
2379 silc_idlist_del_channel(server->global_list, channel);
2380 silc_buffer_free(clidp);
2381 server->stat.my_channels--;
2385 /* Send notify to channel about client leaving the channel */
2387 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2388 SILC_NOTIFY_TYPE_LEAVE, 1,
2389 clidp->data, clidp->len);
2393 silc_buffer_free(clidp);
2397 /* Returns TRUE if the given client is on the channel. FALSE if not.
2398 This works because we assure that the user list on the channel is
2399 always in up to date thus we can only check the channel list from
2400 `client' which is faster than checking the user list from `channel'. */
2402 int silc_server_client_on_channel(SilcClientEntry client,
2403 SilcChannelEntry channel)
2405 SilcChannelClientEntry chl;
2407 if (!client || !channel)
2410 silc_list_start(client->channels);
2411 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2412 if (chl->channel == channel)
2418 /* Timeout callback. This is called if connection is idle or for some
2419 other reason is not responding within some period of time. This
2420 disconnects the remote end. */
2422 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2424 SilcServer server = (SilcServer)context;
2425 SilcSocketConnection sock = server->sockets[fd];
2430 if (sock->user_data)
2431 silc_server_free_sock_user_data(server, sock);
2433 silc_server_disconnect_remote(server, sock,
2434 "Server closed connection: "
2435 "Connection timeout");
2438 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2439 function may be used only by router. In real SILC network all channels
2440 are created by routers thus this function is never used by normal
2443 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2444 SilcServerID *router_id,
2450 SilcChannelID *channel_id;
2451 SilcChannelEntry entry;
2455 SILC_LOG_DEBUG(("Creating new channel"));
2458 cipher = "aes-256-cbc";
2460 hmac = "hmac-sha1-96";
2462 /* Allocate cipher */
2463 if (!silc_cipher_alloc(cipher, &key))
2467 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2468 silc_cipher_free(key);
2472 channel_name = strdup(channel_name);
2474 /* Create the channel */
2475 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2476 entry = silc_idlist_add_channel(server->local_list, channel_name,
2477 SILC_CHANNEL_MODE_NONE, channel_id,
2478 NULL, key, newhmac);
2480 silc_free(channel_name);
2484 entry->cipher = strdup(cipher);
2485 entry->hmac_name = strdup(hmac);
2487 /* Now create the actual key material */
2488 silc_server_create_channel_key(server, entry,
2489 silc_cipher_get_key_len(key) / 8);
2491 /* Notify other routers about the new channel. We send the packet
2492 to our primary route. */
2493 if (broadcast && server->standalone == FALSE)
2494 silc_server_send_new_channel(server, server->router->connection, TRUE,
2495 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2498 server->stat.my_channels++;
2503 /* Same as above but creates the channel with Channel ID `channel_id. */
2506 silc_server_create_new_channel_with_id(SilcServer server,
2510 SilcChannelID *channel_id,
2513 SilcChannelEntry entry;
2517 SILC_LOG_DEBUG(("Creating new channel"));
2520 cipher = "aes-256-cbc";
2522 hmac = "hmac-sha1-96";
2524 /* Allocate cipher */
2525 if (!silc_cipher_alloc(cipher, &key))
2529 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2530 silc_cipher_free(key);
2534 channel_name = strdup(channel_name);
2536 /* Create the channel */
2537 entry = silc_idlist_add_channel(server->local_list, channel_name,
2538 SILC_CHANNEL_MODE_NONE, channel_id,
2539 NULL, key, newhmac);
2541 silc_free(channel_name);
2545 /* Now create the actual key material */
2546 silc_server_create_channel_key(server, entry,
2547 silc_cipher_get_key_len(key) / 8);
2549 /* Notify other routers about the new channel. We send the packet
2550 to our primary route. */
2551 if (broadcast && server->standalone == FALSE)
2552 silc_server_send_new_channel(server, server->router->connection, TRUE,
2553 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2556 server->stat.my_channels++;
2561 /* Generates new channel key. This is used to create the initial channel key
2562 but also to re-generate new key for channel. If `key_len' is provided
2563 it is the bytes of the key length. */
2565 void silc_server_create_channel_key(SilcServer server,
2566 SilcChannelEntry channel,
2567 unsigned int key_len)
2570 unsigned char channel_key[32], hash[32];
2573 SILC_LOG_DEBUG(("Generating channel key"));
2575 if (!channel->channel_key)
2576 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2581 else if (channel->key_len)
2582 len = channel->key_len / 8;
2584 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2586 /* Create channel key */
2587 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2590 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2592 /* Remove old key if exists */
2594 memset(channel->key, 0, channel->key_len / 8);
2595 silc_free(channel->key);
2599 channel->key_len = len * 8;
2600 channel->key = silc_calloc(len, sizeof(*channel->key));
2601 memcpy(channel->key, channel_key, len);
2602 memset(channel_key, 0, sizeof(channel_key));
2604 /* Generate HMAC key from the channel key data and set it */
2606 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2607 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2608 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2609 memset(hash, 0, sizeof(hash));
2612 /* Saves the channel key found in the encoded `key_payload' buffer. This
2613 function is used when we receive Channel Key Payload and also when we're
2614 processing JOIN command reply. Returns entry to the channel. */
2616 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2617 SilcBuffer key_payload,
2618 SilcChannelEntry channel)
2620 SilcChannelKeyPayload payload = NULL;
2621 SilcChannelID *id = NULL;
2622 unsigned char *tmp, hash[32];
2623 unsigned int tmp_len;
2626 /* Decode channel key payload */
2627 payload = silc_channel_key_payload_parse(key_payload);
2629 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2634 /* Get the channel entry */
2637 /* Get channel ID */
2638 tmp = silc_channel_key_get_id(payload, &tmp_len);
2639 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2645 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2647 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2649 SILC_LOG_ERROR(("Received key for non-existent channel"));
2655 tmp = silc_channel_key_get_key(payload, &tmp_len);
2661 cipher = silc_channel_key_get_cipher(payload, NULL);
2667 /* Remove old key if exists */
2669 memset(channel->key, 0, channel->key_len / 8);
2670 silc_free(channel->key);
2671 silc_cipher_free(channel->channel_key);
2674 /* Create new cipher */
2675 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2680 if (channel->cipher)
2681 silc_free(channel->cipher);
2682 channel->cipher = strdup(cipher);
2685 channel->key_len = tmp_len * 8;
2686 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2687 memcpy(channel->key, tmp, tmp_len);
2688 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2690 /* Generate HMAC key from the channel key data and set it */
2692 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2693 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2694 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2696 memset(hash, 0, sizeof(hash));
2697 memset(tmp, 0, tmp_len);
2703 silc_channel_key_payload_free(payload);
2708 /* Heartbeat callback. This function is set as argument for the
2709 silc_socket_set_heartbeat function. The library will call this function
2710 at the set time interval. */
2712 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2715 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2717 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2720 /* Send the heartbeat */
2721 silc_server_send_heartbeat(hb->server, sock);
2724 /* Returns assembled of all servers in the given ID list. The packet's
2725 form is dictated by the New ID payload. */
2727 static void silc_server_announce_get_servers(SilcServer server,
2729 SilcBuffer *servers)
2731 SilcIDCacheList list;
2732 SilcIDCacheEntry id_cache;
2733 SilcServerEntry entry;
2736 /* Go through all clients in the list */
2737 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2738 SILC_ID_SERVER, &list)) {
2739 if (silc_idcache_list_first(list, &id_cache)) {
2741 entry = (SilcServerEntry)id_cache->context;
2743 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2745 *servers = silc_buffer_realloc(*servers,
2747 (*servers)->truelen + idp->len :
2749 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2750 silc_buffer_put(*servers, idp->data, idp->len);
2751 silc_buffer_pull(*servers, idp->len);
2752 silc_buffer_free(idp);
2754 if (!silc_idcache_list_next(list, &id_cache))
2759 silc_idcache_list_free(list);
2763 /* This function is used by router to announce existing servers to our
2764 primary router when we've connected to it. */
2766 void silc_server_announce_servers(SilcServer server)
2768 SilcBuffer servers = NULL;
2770 SILC_LOG_DEBUG(("Announcing servers"));
2772 /* Get servers in local list */
2773 silc_server_announce_get_servers(server, server->local_list, &servers);
2775 /* Get servers in global list */
2776 silc_server_announce_get_servers(server, server->global_list, &servers);
2779 silc_buffer_push(servers, servers->data - servers->head);
2780 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2782 /* Send the packet */
2783 silc_server_packet_send(server, server->router->connection,
2784 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2785 servers->data, servers->len, TRUE);
2787 silc_buffer_free(servers);
2791 /* Returns assembled packet of all clients in the given ID list. The
2792 packet's form is dictated by the New ID Payload. */
2794 static void silc_server_announce_get_clients(SilcServer server,
2796 SilcBuffer *clients)
2798 SilcIDCacheList list;
2799 SilcIDCacheEntry id_cache;
2800 SilcClientEntry client;
2803 /* Go through all clients in the list */
2804 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2805 SILC_ID_CLIENT, &list)) {
2806 if (silc_idcache_list_first(list, &id_cache)) {
2808 client = (SilcClientEntry)id_cache->context;
2810 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2812 *clients = silc_buffer_realloc(*clients,
2814 (*clients)->truelen + idp->len :
2816 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2817 silc_buffer_put(*clients, idp->data, idp->len);
2818 silc_buffer_pull(*clients, idp->len);
2819 silc_buffer_free(idp);
2821 if (!silc_idcache_list_next(list, &id_cache))
2826 silc_idcache_list_free(list);
2830 /* This function is used to announce our existing clients to our router
2831 when we've connected to it. */
2833 void silc_server_announce_clients(SilcServer server)
2835 SilcBuffer clients = NULL;
2837 SILC_LOG_DEBUG(("Announcing clients"));
2839 /* Get clients in local list */
2840 silc_server_announce_get_clients(server, server->local_list,
2843 /* As router we announce our global list as well */
2844 if (server->server_type == SILC_ROUTER)
2845 silc_server_announce_get_clients(server, server->global_list,
2849 silc_buffer_push(clients, clients->data - clients->head);
2850 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2852 /* Send the packet */
2853 silc_server_packet_send(server, server->router->connection,
2854 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2855 clients->data, clients->len, TRUE);
2857 silc_buffer_free(clients);
2862 silc_server_announce_encode_join(unsigned int argc, ...)
2867 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
2870 /* Returns assembled packets for all channels and users on those channels
2871 from the given ID List. The packets are in the form dictated by the
2872 New Channel and New Channel User payloads. */
2874 static void silc_server_announce_get_channels(SilcServer server,
2876 SilcBuffer *channels,
2877 SilcBuffer *channel_users)
2879 SilcIDCacheList list;
2880 SilcIDCacheEntry id_cache;
2881 SilcChannelEntry channel;
2882 SilcChannelClientEntry chl;
2885 unsigned short name_len;
2888 /* Go through all channels in the list */
2889 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2890 SILC_ID_CHANNEL, &list)) {
2891 if (silc_idcache_list_first(list, &id_cache)) {
2893 channel = (SilcChannelEntry)id_cache->context;
2895 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2896 name_len = strlen(channel->channel_name);
2898 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
2900 silc_buffer_realloc(*channels,
2901 (*channels ? (*channels)->truelen + len : len));
2902 silc_buffer_pull_tail(*channels,
2903 ((*channels)->end - (*channels)->data));
2904 silc_buffer_format(*channels,
2905 SILC_STR_UI_SHORT(name_len),
2906 SILC_STR_UI_XNSTRING(channel->channel_name,
2908 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2909 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2912 silc_buffer_pull(*channels, len);
2914 /* Now find all users on the channel */
2915 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
2916 silc_list_start(channel->user_list);
2917 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2921 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
2923 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
2924 chidp->data, chidp->len);
2927 silc_buffer_realloc(*channel_users,
2929 (*channel_users)->truelen + len : len));
2930 silc_buffer_pull_tail(*channel_users,
2931 ((*channel_users)->end -
2932 (*channel_users)->data));
2934 silc_buffer_put(*channel_users, tmp->data, tmp->len);
2935 silc_buffer_pull(*channel_users, len);
2936 silc_buffer_free(clidp);
2937 silc_buffer_free(tmp);
2939 silc_buffer_free(chidp);
2943 if (!silc_idcache_list_next(list, &id_cache))
2948 silc_idcache_list_free(list);
2952 /* This function is used to announce our existing channels to our router
2953 when we've connected to it. This also announces the users on the
2954 channels to the router. */
2956 void silc_server_announce_channels(SilcServer server)
2958 SilcBuffer channels = NULL, channel_users = NULL;
2960 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2962 /* Get channels and channel users in local list */
2963 silc_server_announce_get_channels(server, server->local_list,
2964 &channels, &channel_users);
2966 /* Get channels and channel users in global list */
2967 silc_server_announce_get_channels(server, server->global_list,
2968 &channels, &channel_users);
2971 silc_buffer_push(channels, channels->data - channels->head);
2972 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
2974 /* Send the packet */
2975 silc_server_packet_send(server, server->router->connection,
2976 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
2977 channels->data, channels->len,
2980 silc_buffer_free(channels);
2983 if (channel_users) {
2984 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
2985 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
2986 channel_users->len);
2988 /* Send the packet */
2989 silc_server_packet_send(server, server->router->connection,
2990 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
2991 channel_users->data, channel_users->len,
2994 silc_buffer_free(channel_users);
2998 /* Failure timeout callback. If this is called then we will immediately
2999 process the received failure. We always process the failure with timeout
3000 since we do not want to blindly trust to received failure packets.
3001 This won't be called (the timeout is cancelled) if the failure was
3002 bogus (it is bogus if remote does not close the connection after sending
3005 SILC_TASK_CALLBACK(silc_server_failure_callback)
3007 SilcServerFailureContext f = (SilcServerFailureContext)context;
3009 if (f->sock->protocol) {
3010 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3011 f->sock->protocol->execute(f->server->timeout_queue, 0,
3012 f->sock->protocol, f->sock->sock, 0, 0);
3018 /* Assembles user list and users mode list from the `channel'. */
3020 void silc_server_get_users_on_channel(SilcServer server,
3021 SilcChannelEntry channel,
3022 SilcBuffer *user_list,
3023 SilcBuffer *mode_list,
3024 unsigned int *user_count)
3026 SilcChannelClientEntry chl;
3027 SilcBuffer client_id_list;
3028 SilcBuffer client_mode_list;
3030 unsigned int list_count = 0;
3032 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3033 silc_list_count(channel->user_list));
3034 client_mode_list = silc_buffer_alloc(4 *
3035 silc_list_count(channel->user_list));
3036 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3037 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3038 silc_list_start(channel->user_list);
3039 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3041 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3042 silc_buffer_put(client_id_list, idp->data, idp->len);
3043 silc_buffer_pull(client_id_list, idp->len);
3044 silc_buffer_free(idp);
3046 /* Client's mode on channel */
3047 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3048 silc_buffer_pull(client_mode_list, 4);
3052 silc_buffer_push(client_id_list,
3053 client_id_list->data - client_id_list->head);
3054 silc_buffer_push(client_mode_list,
3055 client_mode_list->data - client_mode_list->head);
3057 *user_list = client_id_list;
3058 *mode_list = client_mode_list;
3059 *user_count = list_count;
3062 /* Saves users and their modes to the `channel'. */
3064 void silc_server_save_users_on_channel(SilcServer server,
3065 SilcSocketConnection sock,
3066 SilcChannelEntry channel,
3067 SilcClientID *noadd,
3068 SilcBuffer user_list,
3069 SilcBuffer mode_list,
3070 unsigned int user_count)
3074 /* Cache the received Client ID's and modes. This cache expires
3075 whenever server sends notify message to channel. It means two things;
3076 some user has joined or leaved the channel. XXX TODO! */
3077 for (i = 0; i < user_count; i++) {
3078 unsigned short idp_len;
3080 SilcClientID *client_id;
3081 SilcClientEntry client;
3084 SILC_GET16_MSB(idp_len, user_list->data + 2);
3086 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3087 silc_buffer_pull(user_list, idp_len);
3092 SILC_GET32_MSB(mode, mode_list->data);
3093 silc_buffer_pull(mode_list, 4);
3095 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3096 silc_free(client_id);
3100 /* Check if we have this client cached already. */
3101 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3104 client = silc_idlist_find_client_by_id(server->global_list,
3107 /* If router did not find such Client ID in its lists then this must
3108 be bogus client or some router in the net is buggy. */
3109 if (server->server_type == SILC_ROUTER) {
3110 silc_free(client_id);
3114 /* We don't have that client anywhere, add it. The client is added
3115 to global list since server didn't have it in the lists so it must be
3117 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3119 silc_id_dup(client_id, SILC_ID_CLIENT),
3120 sock->user_data, NULL);
3122 silc_free(client_id);
3126 client->data.registered = TRUE;
3129 silc_free(client_id);
3131 if (!silc_server_client_on_channel(client, channel)) {
3132 /* Client was not on the channel, add it. */
3133 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3134 chl->client = client;
3136 chl->channel = channel;
3137 silc_list_add(channel->user_list, chl);
3138 silc_list_add(client->channels, chl);
3143 /* Lookups route to the client indicated by `id' client ID. The connection
3144 object and internal data object is returned. Returns NULL if route
3145 could not be found to the client. If the `client_id' is specified then
3146 it is used and the `id_data' is ignored. */
3148 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3149 unsigned char *id_data,
3150 unsigned int id_len,
3151 SilcClientID *client_id,
3152 SilcIDListData *idata)
3155 SilcClientEntry client;
3157 SILC_LOG_DEBUG(("Start"));
3159 /* Decode destination Client ID */
3161 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3163 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3167 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3170 /* If the destination belongs to our server we don't have to route
3171 the packet anywhere but to send it to the local destination. */
3172 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3176 if (client && client->data.registered == FALSE)
3179 /* If we are router and the client has router then the client is in
3180 our cell but not directly connected to us. */
3181 if (server->server_type == SILC_ROUTER && client->router) {
3182 /* We are of course in this case the client's router thus the real
3183 "router" of the client is the server who owns the client. Thus
3184 we will send the packet to that server. */
3185 *idata = (SilcIDListData)client->router;
3186 return client->router->connection;
3189 /* Seems that client really is directly connected to us */
3190 *idata = (SilcIDListData)client;
3191 return client->connection;
3194 /* Destination belongs to someone not in this server. If we are normal
3195 server our action is to send the packet to our router. */
3196 if (server->server_type == SILC_SERVER && !server->standalone) {
3198 *idata = (SilcIDListData)server->router;
3199 return server->router->connection;
3202 /* We are router and we will perform route lookup for the destination
3203 and send the packet to fastest route. */
3204 if (server->server_type == SILC_ROUTER && !server->standalone) {
3205 /* Check first that the ID is valid */
3206 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3208 SilcSocketConnection dst_sock;
3210 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3213 *idata = (SilcIDListData)dst_sock->user_data;
3222 /* Encodes and returns channel list of channels the `client' has joined.
3223 Secret channels are not put to the list. */
3225 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3226 SilcClientEntry client)
3228 SilcBuffer buffer = NULL;
3229 SilcChannelEntry channel;
3230 SilcChannelClientEntry chl;
3232 unsigned short name_len;
3235 silc_list_start(client->channels);
3236 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3237 channel = chl->channel;
3239 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3242 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3243 name_len = strlen(channel->channel_name);
3245 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3246 buffer = silc_buffer_realloc(buffer,
3247 (buffer ? (buffer)->truelen + len : len));
3248 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3249 silc_buffer_format(buffer,
3250 SILC_STR_UI_SHORT(name_len),
3251 SILC_STR_UI_XNSTRING(channel->channel_name,
3253 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3254 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3255 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3257 silc_buffer_pull(buffer, len);
3262 silc_buffer_push(buffer, buffer->data - buffer->head);
3267 /* Finds client entry by Client ID and if it is not found then resolves
3268 it using WHOIS command. */
3270 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3271 SilcClientID *client_id)
3273 SilcClientEntry client;
3275 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3277 client = silc_idlist_find_client_by_id(server->global_list,
3279 if (!client && server->server_type == SILC_ROUTER)
3283 if (!client && server->standalone)
3286 if (!client || !client->nickname || !client->username) {
3287 SilcBuffer buffer, idp;
3289 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3290 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3291 ++server->cmd_ident, 1,
3292 3, idp->data, idp->len);
3293 silc_server_packet_send(server, client ? client->router->connection :
3294 server->router->connection,
3295 SILC_PACKET_COMMAND, 0,
3296 buffer->data, buffer->len, FALSE);
3297 silc_buffer_free(idp);
3298 silc_buffer_free(buffer);