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;
715 SILC_LOG_DEBUG(("Start"));
717 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
718 /* Error occured during protocol */
719 silc_protocol_free(protocol);
720 silc_ske_free_key_material(ctx->keymat);
722 silc_packet_context_free(ctx->packet);
724 silc_ske_free(ctx->ske);
726 silc_free(ctx->dest_id);
728 silc_task_unregister_by_callback(server->timeout_queue,
729 silc_server_failure_callback);
730 silc_server_disconnect_remote(server, sock, "Server closed connection: "
731 "Key exchange failed");
735 /* We now have the key material as the result of the key exchange
736 protocol. Take the key material into use. Free the raw key material
737 as soon as we've set them into use. */
738 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
739 ctx->ske->prop->cipher,
740 ctx->ske->prop->pkcs,
741 ctx->ske->prop->hash,
742 ctx->ske->prop->hmac,
744 silc_protocol_free(protocol);
745 silc_ske_free_key_material(ctx->keymat);
747 silc_packet_context_free(ctx->packet);
749 silc_ske_free(ctx->ske);
751 silc_free(ctx->dest_id);
753 silc_task_unregister_by_callback(server->timeout_queue,
754 silc_server_failure_callback);
755 silc_server_disconnect_remote(server, sock, "Server closed connection: "
756 "Key exchange failed");
759 silc_ske_free_key_material(ctx->keymat);
761 /* Allocate internal context for the authentication protocol. This
762 is sent as context for the protocol. */
763 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
764 proto_ctx->server = (void *)server;
765 proto_ctx->context = (void *)sconn;
766 proto_ctx->sock = sock = server->sockets[fd];
767 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
768 proto_ctx->dest_id_type = ctx->dest_id_type;
769 proto_ctx->dest_id = ctx->dest_id;
771 /* Resolve the authentication method used in this connection */
772 proto_ctx->auth_meth = SILC_AUTH_PASSWORD;
773 if (server->config->routers) {
774 SilcServerConfigSectionServerConnection *conn = NULL;
776 /* Check if we find a match from user configured connections */
777 conn = silc_server_config_find_router_conn(server->config,
781 /* Match found. Use the configured authentication method */
782 proto_ctx->auth_meth = conn->auth_meth;
783 if (conn->auth_data) {
784 proto_ctx->auth_data = strdup(conn->auth_data);
785 proto_ctx->auth_data_len = strlen(conn->auth_data);
788 /* No match found. */
795 /* Free old protocol as it is finished now */
796 silc_protocol_free(protocol);
798 silc_packet_context_free(ctx->packet);
800 sock->protocol = NULL;
802 /* Allocate the authentication protocol. This is allocated here
803 but we won't start it yet. We will be receiving party of this
804 protocol thus we will wait that connecting party will make
806 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
807 &sock->protocol, proto_ctx,
808 silc_server_connect_to_router_final);
810 /* Register timeout task. If the protocol is not executed inside
811 this timelimit the connection will be terminated. Currently
812 this is 15 seconds and is hard coded limit (XXX). */
813 proto_ctx->timeout_task =
814 silc_task_register(server->timeout_queue, sock->sock,
815 silc_server_timeout_remote,
816 (void *)server, 15, 0,
820 /* Run the protocol */
821 sock->protocol->execute(server->timeout_queue, 0,
822 sock->protocol, sock->sock, 0, 0);
825 /* Finalizes the connection to router. Registers a server task to the
826 queue so that we can accept new connections. */
828 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
830 SilcProtocol protocol = (SilcProtocol)context;
831 SilcServerConnAuthInternalContext *ctx =
832 (SilcServerConnAuthInternalContext *)protocol->context;
833 SilcServer server = (SilcServer)ctx->server;
834 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
835 SilcSocketConnection sock = ctx->sock;
836 SilcServerEntry id_entry;
838 SilcServerHBContext hb_context;
839 unsigned char *id_string;
841 SILC_LOG_DEBUG(("Start"));
843 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
844 /* Error occured during protocol */
846 silc_free(ctx->dest_id);
847 silc_server_disconnect_remote(server, sock, "Server closed connection: "
848 "Authentication failed");
852 /* Add a task to the queue. This task receives new connections to the
853 server. This task remains on the queue until the end of the program. */
854 if (!server->listenning) {
855 silc_task_register(server->io_queue, server->sock,
856 silc_server_accept_new_connection,
857 (void *)server, 0, 0,
859 SILC_TASK_PRI_NORMAL);
860 server->listenning = TRUE;
863 /* Send NEW_SERVER packet to the router. We will become registered
864 to the SILC network after sending this packet. */
865 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
866 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
867 strlen(server->server_name));
868 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
869 silc_buffer_format(packet,
870 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
871 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
872 SILC_STR_UI_SHORT(strlen(server->server_name)),
873 SILC_STR_UI_XNSTRING(server->server_name,
874 strlen(server->server_name)),
877 /* Send the packet */
878 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
879 packet->data, packet->len, TRUE);
880 silc_buffer_free(packet);
881 silc_free(id_string);
883 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
885 /* Add the connected router to local server list */
886 server->standalone = FALSE;
887 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
888 SILC_ROUTER, ctx->dest_id, NULL, sock);
891 silc_free(ctx->dest_id);
892 silc_server_disconnect_remote(server, sock, "Server closed connection: "
893 "Authentication failed");
897 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
898 silc_free(sock->user_data);
899 sock->user_data = (void *)id_entry;
900 sock->type = SILC_SOCKET_TYPE_ROUTER;
901 server->id_entry->router = id_entry;
902 server->router = id_entry;
903 server->router->data.registered = TRUE;
905 /* Perform keepalive. The `hb_context' will be freed automatically
906 when finally calling the silc_socket_free function. XXX hardcoded
908 hb_context = silc_calloc(1, sizeof(*hb_context));
909 hb_context->server = server;
910 silc_socket_set_heartbeat(sock, 600, hb_context,
911 silc_server_perform_heartbeat,
912 server->timeout_queue);
914 /* If we are router then announce our possible servers. */
915 if (server->server_type == SILC_ROUTER)
916 silc_server_announce_servers(server);
918 /* Announce our clients and channels to the router */
919 silc_server_announce_clients(server);
920 silc_server_announce_channels(server);
923 /* Free the temporary connection data context */
925 silc_free(sconn->remote_host);
929 /* Free the protocol object */
930 silc_protocol_free(protocol);
932 silc_packet_context_free(ctx->packet);
934 silc_ske_free(ctx->ske);
936 sock->protocol = NULL;
939 /* Accepts new connections to the server. Accepting new connections are
940 done in three parts to make it async. */
942 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
944 SilcServer server = (SilcServer)context;
945 SilcSocketConnection newsocket;
946 SilcServerKEInternalContext *proto_ctx;
949 SILC_LOG_DEBUG(("Accepting new connection"));
951 server->stat.conn_attempts++;
953 sock = silc_net_accept_connection(server->sock);
955 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
956 server->stat.conn_failures++;
960 /* Check max connections */
961 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
962 if (server->config->redirect) {
963 /* XXX Redirecting connection to somewhere else now?? */
964 /*silc_server_send_notify("Server is full, trying to redirect..."); */
966 SILC_LOG_ERROR(("Refusing connection, server is full"));
967 server->stat.conn_failures++;
972 /* Set socket options */
973 silc_net_set_socket_nonblock(sock);
974 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
976 /* We don't create a ID yet, since we don't know what type of connection
977 this is yet. But, we do add the connection to the socket table. */
978 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
979 server->sockets[sock] = newsocket;
981 /* XXX This MUST be done async as this will block the entire server
982 process. Either we have to do our own resolver stuff or in the future
983 we can use threads. */
984 /* Perform name and address lookups for the remote host. */
985 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
986 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
988 SILC_LOG_ERROR(("IP/DNS lookup failed"));
989 server->stat.conn_failures++;
992 if (!newsocket->hostname)
993 newsocket->hostname = strdup(newsocket->ip);
994 newsocket->port = silc_net_get_remote_port(sock);
996 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
999 /* Allocate internal context for key exchange protocol. This is
1000 sent as context for the protocol. */
1001 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1002 proto_ctx->server = context;
1003 proto_ctx->sock = newsocket;
1004 proto_ctx->rng = server->rng;
1005 proto_ctx->responder = TRUE;
1007 /* Prepare the connection for key exchange protocol. We allocate the
1008 protocol but will not start it yet. The connector will be the
1009 initiator of the protocol thus we will wait for initiation from
1010 there before we start the protocol. */
1011 server->stat.auth_attempts++;
1012 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1013 &newsocket->protocol, proto_ctx,
1014 silc_server_accept_new_connection_second);
1016 /* Register a timeout task that will be executed if the connector
1017 will not start the key exchange protocol within 60 seconds. For
1018 now, this is a hard coded limit. After 60 secs the connection will
1019 be closed if the key exchange protocol has not been started. */
1020 proto_ctx->timeout_task =
1021 silc_task_register(server->timeout_queue, newsocket->sock,
1022 silc_server_timeout_remote,
1027 /* Register the connection for network input and output. This sets
1028 that scheduler will listen for incoming packets for this connection
1029 and sets that outgoing packets may be sent to this connection as well.
1030 However, this doesn't set the scheduler for outgoing traffic, it
1031 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1032 later when outgoing data is available. */
1033 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1036 /* Second part of accepting new connection. Key exchange protocol has been
1037 performed and now it is time to do little connection authentication
1038 protocol to figure out whether this connection is client or server
1039 and whether it has right to access this server (especially server
1040 connections needs to be authenticated). */
1042 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1044 SilcProtocol protocol = (SilcProtocol)context;
1045 SilcServerKEInternalContext *ctx =
1046 (SilcServerKEInternalContext *)protocol->context;
1047 SilcServer server = (SilcServer)ctx->server;
1048 SilcSocketConnection sock = NULL;
1049 SilcServerConnAuthInternalContext *proto_ctx;
1051 SILC_LOG_DEBUG(("Start"));
1053 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1054 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1055 /* Error occured during protocol */
1056 silc_protocol_free(protocol);
1057 silc_ske_free_key_material(ctx->keymat);
1059 silc_packet_context_free(ctx->packet);
1061 silc_ske_free(ctx->ske);
1063 silc_free(ctx->dest_id);
1065 silc_task_unregister_by_callback(server->timeout_queue,
1066 silc_server_failure_callback);
1067 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1068 "Key exchange failed");
1069 server->stat.auth_failures++;
1073 /* We now have the key material as the result of the key exchange
1074 protocol. Take the key material into use. Free the raw key material
1075 as soon as we've set them into use. */
1076 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1077 ctx->ske->prop->cipher,
1078 ctx->ske->prop->pkcs,
1079 ctx->ske->prop->hash,
1080 ctx->ske->prop->hmac,
1082 silc_protocol_free(protocol);
1083 silc_ske_free_key_material(ctx->keymat);
1085 silc_packet_context_free(ctx->packet);
1087 silc_ske_free(ctx->ske);
1089 silc_free(ctx->dest_id);
1091 silc_task_unregister_by_callback(server->timeout_queue,
1092 silc_server_failure_callback);
1093 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1094 "Key exchange failed");
1095 server->stat.auth_failures++;
1098 silc_ske_free_key_material(ctx->keymat);
1100 /* Allocate internal context for the authentication protocol. This
1101 is sent as context for the protocol. */
1102 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1103 proto_ctx->server = (void *)server;
1104 proto_ctx->sock = sock = server->sockets[fd];
1105 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1106 proto_ctx->responder = TRUE;
1107 proto_ctx->dest_id_type = ctx->dest_id_type;
1108 proto_ctx->dest_id = ctx->dest_id;
1110 /* Free old protocol as it is finished now */
1111 silc_protocol_free(protocol);
1113 silc_packet_context_free(ctx->packet);
1115 sock->protocol = NULL;
1117 /* Allocate the authentication protocol. This is allocated here
1118 but we won't start it yet. We will be receiving party of this
1119 protocol thus we will wait that connecting party will make
1120 their first move. */
1121 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1122 &sock->protocol, proto_ctx,
1123 silc_server_accept_new_connection_final);
1125 /* Register timeout task. If the protocol is not executed inside
1126 this timelimit the connection will be terminated. Currently
1127 this is 60 seconds and is hard coded limit (XXX). */
1128 proto_ctx->timeout_task =
1129 silc_task_register(server->timeout_queue, sock->sock,
1130 silc_server_timeout_remote,
1131 (void *)server, 60, 0,
1136 /* Final part of accepting new connection. The connection has now
1137 been authenticated and keys has been exchanged. We also know whether
1138 this is client or server connection. */
1140 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1142 SilcProtocol protocol = (SilcProtocol)context;
1143 SilcServerConnAuthInternalContext *ctx =
1144 (SilcServerConnAuthInternalContext *)protocol->context;
1145 SilcServer server = (SilcServer)ctx->server;
1146 SilcSocketConnection sock = ctx->sock;
1147 SilcServerHBContext hb_context;
1148 void *id_entry = NULL;
1150 SILC_LOG_DEBUG(("Start"));
1152 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1153 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1154 /* Error occured during protocol */
1155 silc_protocol_free(protocol);
1157 silc_packet_context_free(ctx->packet);
1159 silc_ske_free(ctx->ske);
1161 silc_free(ctx->dest_id);
1164 sock->protocol = NULL;
1165 silc_task_unregister_by_callback(server->timeout_queue,
1166 silc_server_failure_callback);
1167 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1168 "Authentication failed");
1169 server->stat.auth_failures++;
1173 sock->type = ctx->conn_type;
1174 switch(sock->type) {
1175 case SILC_SOCKET_TYPE_CLIENT:
1177 SilcClientEntry client;
1179 SILC_LOG_DEBUG(("Remote host is client"));
1180 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1183 /* Add the client to the client ID cache. The nickname and Client ID
1184 and other information is created after we have received NEW_CLIENT
1185 packet from client. */
1186 client = silc_idlist_add_client(server->local_list,
1187 NULL, 0, NULL, NULL, NULL, NULL, sock);
1189 SILC_LOG_ERROR(("Could not add new client to cache"));
1190 silc_free(sock->user_data);
1195 server->stat.my_clients++;
1196 server->stat.clients++;
1197 if (server->server_type == SILC_ROUTER)
1198 server->stat.cell_clients++;
1200 id_entry = (void *)client;
1203 case SILC_SOCKET_TYPE_SERVER:
1204 case SILC_SOCKET_TYPE_ROUTER:
1206 SilcServerEntry new_server;
1208 SILC_LOG_DEBUG(("Remote host is %s",
1209 sock->type == SILC_SOCKET_TYPE_SERVER ?
1210 "server" : "router"));
1211 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1212 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1213 "server" : "router"));
1215 /* Add the server into server cache. The server name and Server ID
1216 is updated after we have received NEW_SERVER packet from the
1217 server. We mark ourselves as router for this server if we really
1220 silc_idlist_add_server(server->local_list, NULL,
1221 sock->type == SILC_SOCKET_TYPE_SERVER ?
1222 SILC_SERVER : SILC_ROUTER, NULL,
1223 sock->type == SILC_SOCKET_TYPE_SERVER ?
1224 server->id_entry : NULL, sock);
1226 SILC_LOG_ERROR(("Could not add new server to cache"));
1227 silc_free(sock->user_data);
1232 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1233 server->stat.my_servers++;
1235 server->stat.my_routers++;
1236 server->stat.servers++;
1238 id_entry = (void *)new_server;
1240 /* There is connection to other server now, if it is router then
1241 we will have connection to outside world. If we are router but
1242 normal server connected to us then we will remain standalone,
1243 if we are standlone. */
1244 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1245 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1246 server->standalone = FALSE;
1247 if (!server->id_entry->router) {
1248 server->id_entry->router = id_entry;
1249 server->router = id_entry;
1258 /* Add the common data structure to the ID entry. */
1260 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1262 /* Add to sockets internal pointer for fast referencing */
1263 silc_free(sock->user_data);
1264 sock->user_data = id_entry;
1266 /* Connection has been fully established now. Everything is ok. */
1267 SILC_LOG_DEBUG(("New connection authenticated"));
1269 /* Perform keepalive. The `hb_context' will be freed automatically
1270 when finally calling the silc_socket_free function. XXX hardcoded
1272 hb_context = silc_calloc(1, sizeof(*hb_context));
1273 hb_context->server = server;
1274 silc_socket_set_heartbeat(sock, 600, hb_context,
1275 silc_server_perform_heartbeat,
1276 server->timeout_queue);
1278 silc_task_unregister_by_callback(server->timeout_queue,
1279 silc_server_failure_callback);
1280 silc_protocol_free(protocol);
1282 silc_packet_context_free(ctx->packet);
1284 silc_ske_free(ctx->ske);
1286 silc_free(ctx->dest_id);
1288 sock->protocol = NULL;
1291 /* This function is used to read packets from network and send packets to
1292 network. This is usually a generic task. */
1294 SILC_TASK_CALLBACK(silc_server_packet_process)
1296 SilcServer server = (SilcServer)context;
1297 SilcSocketConnection sock = server->sockets[fd];
1298 SilcIDListData idata;
1299 SilcCipher cipher = NULL;
1300 SilcHmac hmac = NULL;
1306 SILC_LOG_DEBUG(("Processing packet"));
1308 /* Packet sending */
1310 if (type == SILC_TASK_WRITE) {
1311 /* Do not send data to disconnected connection */
1312 if (SILC_IS_DISCONNECTED(sock))
1315 server->stat.packets_sent++;
1317 if (sock->outbuf->data - sock->outbuf->head)
1318 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1320 ret = silc_server_packet_send_real(server, sock, TRUE);
1322 /* If returned -2 could not write to connection now, will do
1330 /* The packet has been sent and now it is time to set the connection
1331 back to only for input. When there is again some outgoing data
1332 available for this connection it will be set for output as well.
1333 This call clears the output setting and sets it only for input. */
1334 SILC_SET_CONNECTION_FOR_INPUT(fd);
1335 SILC_UNSET_OUTBUF_PENDING(sock);
1337 silc_buffer_clear(sock->outbuf);
1341 /* Packet receiving */
1343 /* Read some data from connection */
1344 ret = silc_packet_receive(sock);
1350 SILC_LOG_DEBUG(("Read EOF"));
1352 /* If connection is disconnecting already we will finally
1353 close the connection */
1354 if (SILC_IS_DISCONNECTING(sock)) {
1355 if (sock->user_data)
1356 silc_server_free_sock_user_data(server, sock);
1357 silc_server_close_connection(server, sock);
1361 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1362 SILC_SET_DISCONNECTING(sock);
1364 /* If the closed connection was our primary router connection the
1365 start re-connecting phase. */
1366 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1367 sock == server->router->connection)
1368 silc_task_register(server->timeout_queue, 0,
1369 silc_server_connect_to_router,
1372 SILC_TASK_PRI_NORMAL);
1374 if (sock->user_data)
1375 silc_server_free_sock_user_data(server, sock);
1376 silc_server_close_connection(server, sock);
1380 /* If connection is disconnecting or disconnected we will ignore
1382 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1383 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1387 server->stat.packets_received++;
1389 /* Get keys and stuff from ID entry */
1390 idata = (SilcIDListData)sock->user_data;
1392 idata->last_receive = time(NULL);
1393 cipher = idata->receive_key;
1397 /* Process the packet. This will call the parser that will then
1398 decrypt and parse the packet. */
1399 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1403 /* Callback function that the silc_packet_decrypt will call to make the
1404 decision whether the packet is normal or special packet. We will
1405 return TRUE if it is normal and FALSE if it is special */
1407 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1409 SilcPacketContext *packet,
1412 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1413 SilcServer server = (SilcServer)parse_ctx->context;
1415 /* Packet is normal packet, if:
1417 1) packet is private message packet and does not have private key set
1418 2) is other packet than channel message packet
1419 3) is channel message packet and remote is router and we are router
1421 all other packets are special packets
1423 if ((packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1424 !(buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY)) ||
1425 packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1426 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1427 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1428 server->server_type == SILC_ROUTER))
1434 /* Parses whole packet, received earlier. */
1436 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1438 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1439 SilcServer server = (SilcServer)parse_ctx->context;
1440 SilcSocketConnection sock = parse_ctx->sock;
1441 SilcPacketContext *packet = parse_ctx->packet;
1444 SILC_LOG_DEBUG(("Start"));
1446 /* Decrypt the received packet */
1447 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1448 packet->buffer, packet,
1449 silc_server_packet_decrypt_check, parse_ctx);
1454 /* Parse the packet. Packet type is returned. */
1455 ret = silc_packet_parse(packet);
1457 /* Parse the packet header in special way as this is "special"
1459 ret = silc_packet_parse_special(packet);
1462 if (ret == SILC_PACKET_NONE)
1465 /* Check that the the current client ID is same as in the client's packet. */
1466 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1467 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1468 if (client && client->id) {
1469 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1470 packet->src_id_type);
1471 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1479 if (server->server_type == SILC_ROUTER) {
1480 /* Route the packet if it is not destined to us. Other ID types but
1481 server are handled separately after processing them. */
1482 if (packet->dst_id_type == SILC_ID_SERVER &&
1483 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1484 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1486 /* Route the packet to fastest route for the destination ID */
1487 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1488 packet->dst_id_type);
1491 silc_server_packet_route(server,
1492 silc_server_route_get(server, id,
1493 packet->dst_id_type),
1499 /* Broadcast packet if it is marked as broadcast packet and it is
1500 originated from router and we are router. */
1501 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1502 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1503 silc_server_packet_broadcast(server, server->router->connection, packet);
1507 /* Parse the incoming packet type */
1508 silc_server_packet_parse_type(server, sock, packet);
1511 silc_buffer_clear(sock->inbuf);
1512 silc_packet_context_free(packet);
1513 silc_free(parse_ctx);
1516 /* Parser callback called by silc_packet_receive_process. This merely
1517 registers timeout that will handle the actual parsing when appropriate. */
1519 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1521 SilcServer server = (SilcServer)parser_context->context;
1522 SilcSocketConnection sock = parser_context->sock;
1524 switch (sock->type) {
1525 case SILC_SOCKET_TYPE_CLIENT:
1526 case SILC_SOCKET_TYPE_UNKNOWN:
1527 /* Parse the packet with timeout */
1528 silc_task_register(server->timeout_queue, sock->sock,
1529 silc_server_packet_parse_real,
1530 (void *)parser_context, 0, 100000,
1532 SILC_TASK_PRI_NORMAL);
1534 case SILC_SOCKET_TYPE_SERVER:
1535 case SILC_SOCKET_TYPE_ROUTER:
1536 /* Packets from servers are parsed as soon as possible */
1537 silc_task_register(server->timeout_queue, sock->sock,
1538 silc_server_packet_parse_real,
1539 (void *)parser_context, 0, 1,
1541 SILC_TASK_PRI_NORMAL);
1548 /* Parses the packet type and calls what ever routines the packet type
1549 requires. This is done for all incoming packets. */
1551 void silc_server_packet_parse_type(SilcServer server,
1552 SilcSocketConnection sock,
1553 SilcPacketContext *packet)
1555 SilcPacketType type = packet->type;
1557 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1559 /* Parse the packet type */
1561 case SILC_PACKET_DISCONNECT:
1562 SILC_LOG_DEBUG(("Disconnect packet"));
1563 if (packet->flags & SILC_PACKET_FLAG_LIST)
1567 case SILC_PACKET_SUCCESS:
1569 * Success received for something. For now we can have only
1570 * one protocol for connection executing at once hence this
1571 * success message is for whatever protocol is executing currently.
1573 SILC_LOG_DEBUG(("Success packet"));
1574 if (packet->flags & SILC_PACKET_FLAG_LIST)
1576 if (sock->protocol) {
1577 sock->protocol->execute(server->timeout_queue, 0,
1578 sock->protocol, sock->sock, 0, 0);
1582 case SILC_PACKET_FAILURE:
1584 * Failure received for something. For now we can have only
1585 * one protocol for connection executing at once hence this
1586 * failure message is for whatever protocol is executing currently.
1588 SILC_LOG_DEBUG(("Failure packet"));
1589 if (packet->flags & SILC_PACKET_FLAG_LIST)
1591 if (sock->protocol) {
1592 SilcServerFailureContext f;
1593 f = silc_calloc(1, sizeof(*f));
1597 /* We will wait 5 seconds to process this failure packet */
1598 silc_task_register(server->timeout_queue, sock->sock,
1599 silc_server_failure_callback, (void *)f, 5, 0,
1600 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1604 case SILC_PACKET_REJECT:
1605 SILC_LOG_DEBUG(("Reject packet"));
1606 if (packet->flags & SILC_PACKET_FLAG_LIST)
1611 case SILC_PACKET_NOTIFY:
1613 * Received notify packet. Server can receive notify packets from
1614 * router. Server then relays the notify messages to clients if needed.
1616 SILC_LOG_DEBUG(("Notify packet"));
1617 if (packet->flags & SILC_PACKET_FLAG_LIST)
1618 silc_server_notify_list(server, sock, packet);
1620 silc_server_notify(server, sock, packet);
1626 case SILC_PACKET_CHANNEL_MESSAGE:
1628 * Received channel message. Channel messages are special packets
1629 * (although probably most common ones) thus they are handled
1632 SILC_LOG_DEBUG(("Channel Message packet"));
1633 if (packet->flags & SILC_PACKET_FLAG_LIST)
1635 silc_server_channel_message(server, sock, packet);
1638 case SILC_PACKET_CHANNEL_KEY:
1640 * Received key for channel. As channels are created by the router
1641 * the keys are as well. We will distribute the key to all of our
1642 * locally connected clients on the particular channel. Router
1643 * never receives this channel and thus is ignored.
1645 SILC_LOG_DEBUG(("Channel Key packet"));
1646 if (packet->flags & SILC_PACKET_FLAG_LIST)
1648 silc_server_channel_key(server, sock, packet);
1654 case SILC_PACKET_COMMAND:
1656 * Recived command. Processes the command request and allocates the
1657 * command context and calls the command.
1659 SILC_LOG_DEBUG(("Command packet"));
1660 if (packet->flags & SILC_PACKET_FLAG_LIST)
1662 silc_server_command_process(server, sock, packet);
1665 case SILC_PACKET_COMMAND_REPLY:
1667 * Received command reply packet. Received command reply to command. It
1668 * may be reply to command sent by us or reply to command sent by client
1669 * that we've routed further.
1671 SILC_LOG_DEBUG(("Command Reply packet"));
1672 if (packet->flags & SILC_PACKET_FLAG_LIST)
1674 silc_server_command_reply(server, sock, packet);
1678 * Private Message packets
1680 case SILC_PACKET_PRIVATE_MESSAGE:
1682 * Received private message packet. The packet is coming from either
1685 SILC_LOG_DEBUG(("Private Message packet"));
1686 if (packet->flags & SILC_PACKET_FLAG_LIST)
1688 silc_server_private_message(server, sock, packet);
1691 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1693 * Private message key packet.
1695 if (packet->flags & SILC_PACKET_FLAG_LIST)
1697 silc_server_private_message_key(server, sock, packet);
1701 * Key Exchange protocol packets
1703 case SILC_PACKET_KEY_EXCHANGE:
1704 SILC_LOG_DEBUG(("KE packet"));
1705 if (packet->flags & SILC_PACKET_FLAG_LIST)
1708 if (sock->protocol && sock->protocol->protocol->type
1709 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1711 SilcServerKEInternalContext *proto_ctx =
1712 (SilcServerKEInternalContext *)sock->protocol->context;
1714 proto_ctx->packet = silc_packet_context_dup(packet);
1716 /* Let the protocol handle the packet */
1717 sock->protocol->execute(server->timeout_queue, 0,
1718 sock->protocol, sock->sock, 0, 100000);
1720 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1721 "protocol active, packet dropped."));
1723 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1727 case SILC_PACKET_KEY_EXCHANGE_1:
1728 SILC_LOG_DEBUG(("KE 1 packet"));
1729 if (packet->flags & SILC_PACKET_FLAG_LIST)
1732 if (sock->protocol && sock->protocol->protocol->type
1733 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1735 SilcServerKEInternalContext *proto_ctx =
1736 (SilcServerKEInternalContext *)sock->protocol->context;
1738 if (proto_ctx->packet)
1739 silc_packet_context_free(proto_ctx->packet);
1741 proto_ctx->packet = silc_packet_context_dup(packet);
1742 proto_ctx->dest_id_type = packet->src_id_type;
1743 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1744 packet->src_id_type);
1745 if (!proto_ctx->dest_id)
1748 /* Let the protocol handle the packet */
1749 sock->protocol->execute(server->timeout_queue, 0,
1750 sock->protocol, sock->sock,
1753 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1754 "protocol active, packet dropped."));
1758 case SILC_PACKET_KEY_EXCHANGE_2:
1759 SILC_LOG_DEBUG(("KE 2 packet"));
1760 if (packet->flags & SILC_PACKET_FLAG_LIST)
1763 if (sock->protocol && sock->protocol->protocol->type
1764 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1766 SilcServerKEInternalContext *proto_ctx =
1767 (SilcServerKEInternalContext *)sock->protocol->context;
1769 if (proto_ctx->packet)
1770 silc_packet_context_free(proto_ctx->packet);
1772 proto_ctx->packet = silc_packet_context_dup(packet);
1773 proto_ctx->dest_id_type = packet->src_id_type;
1774 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1775 packet->src_id_type);
1776 if (!proto_ctx->dest_id)
1779 /* Let the protocol handle the packet */
1780 sock->protocol->execute(server->timeout_queue, 0,
1781 sock->protocol, sock->sock,
1784 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1785 "protocol active, packet dropped."));
1789 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1791 * Connection authentication request packet. When we receive this packet
1792 * we will send to the other end information about our mandatory
1793 * authentication method for the connection. This packet maybe received
1796 SILC_LOG_DEBUG(("Connection authentication request packet"));
1797 if (packet->flags & SILC_PACKET_FLAG_LIST)
1802 * Connection Authentication protocol packets
1804 case SILC_PACKET_CONNECTION_AUTH:
1805 /* Start of the authentication protocol. We receive here the
1806 authentication data and will verify it. */
1807 SILC_LOG_DEBUG(("Connection auth packet"));
1808 if (packet->flags & SILC_PACKET_FLAG_LIST)
1811 if (sock->protocol && sock->protocol->protocol->type
1812 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1814 SilcServerConnAuthInternalContext *proto_ctx =
1815 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1817 proto_ctx->packet = silc_packet_context_dup(packet);
1819 /* Let the protocol handle the packet */
1820 sock->protocol->execute(server->timeout_queue, 0,
1821 sock->protocol, sock->sock, 0, 0);
1823 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1824 "protocol active, packet dropped."));
1828 case SILC_PACKET_NEW_ID:
1830 * Received New ID packet. This includes some new ID that has been
1831 * created. It may be for client, server or channel. This is the way
1832 * to distribute information about new registered entities in the
1835 SILC_LOG_DEBUG(("New ID packet"));
1836 if (packet->flags & SILC_PACKET_FLAG_LIST)
1837 silc_server_new_id_list(server, sock, packet);
1839 silc_server_new_id(server, sock, packet);
1842 case SILC_PACKET_NEW_CLIENT:
1844 * Received new client packet. This includes client information that
1845 * we will use to create initial client ID. After creating new
1846 * ID we will send it to the client.
1848 SILC_LOG_DEBUG(("New Client packet"));
1849 if (packet->flags & SILC_PACKET_FLAG_LIST)
1851 silc_server_new_client(server, sock, packet);
1854 case SILC_PACKET_NEW_SERVER:
1856 * Received new server packet. This includes Server ID and some other
1857 * information that we may save. This is received after server has
1860 SILC_LOG_DEBUG(("New Server packet"));
1861 if (packet->flags & SILC_PACKET_FLAG_LIST)
1863 silc_server_new_server(server, sock, packet);
1866 case SILC_PACKET_NEW_CHANNEL:
1868 * Received new channel packet. Information about new channel in the
1869 * network are distributed using this packet.
1871 SILC_LOG_DEBUG(("New Channel packet"));
1872 if (packet->flags & SILC_PACKET_FLAG_LIST)
1873 silc_server_new_channel_list(server, sock, packet);
1875 silc_server_new_channel(server, sock, packet);
1878 case SILC_PACKET_HEARTBEAT:
1880 * Received heartbeat.
1882 SILC_LOG_DEBUG(("Heartbeat packet"));
1883 if (packet->flags & SILC_PACKET_FLAG_LIST)
1887 case SILC_PACKET_KEY_AGREEMENT:
1889 * Received heartbeat.
1891 SILC_LOG_DEBUG(("Key agreement packet"));
1892 if (packet->flags & SILC_PACKET_FLAG_LIST)
1894 silc_server_key_agreement(server, sock, packet);
1898 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1904 /* Creates connection to a remote router. */
1906 void silc_server_create_connection(SilcServer server,
1907 char *remote_host, unsigned int port)
1909 SilcServerConnection sconn;
1911 /* Allocate connection object for hold connection specific stuff. */
1912 sconn = silc_calloc(1, sizeof(*sconn));
1913 sconn->server = server;
1914 sconn->remote_host = strdup(remote_host);
1915 sconn->remote_port = port;
1917 silc_task_register(server->timeout_queue, 0,
1918 silc_server_connect_router,
1919 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1920 SILC_TASK_PRI_NORMAL);
1923 /* Closes connection to socket connection */
1925 void silc_server_close_connection(SilcServer server,
1926 SilcSocketConnection sock)
1928 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1930 /* We won't listen for this connection anymore */
1931 silc_schedule_unset_listen_fd(sock->sock);
1933 /* Unregister all tasks */
1934 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1935 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1937 /* Close the actual connection */
1938 silc_net_close_connection(sock->sock);
1939 server->sockets[sock->sock] = NULL;
1940 silc_socket_free(sock);
1943 /* Sends disconnect message to remote connection and disconnects the
1946 void silc_server_disconnect_remote(SilcServer server,
1947 SilcSocketConnection sock,
1948 const char *fmt, ...)
1951 unsigned char buf[4096];
1956 memset(buf, 0, sizeof(buf));
1958 vsprintf(buf, fmt, ap);
1961 SILC_LOG_DEBUG(("Disconnecting remote host"));
1963 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
1965 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1966 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1967 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1970 /* Notify remote end that the conversation is over. The notify message
1971 is tried to be sent immediately. */
1972 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1973 buf, strlen(buf), TRUE);
1975 /* Mark the connection to be disconnected */
1976 SILC_SET_DISCONNECTED(sock);
1977 silc_server_close_connection(server, sock);
1982 SilcClientEntry client;
1983 } *FreeClientInternal;
1985 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
1987 FreeClientInternal i = (FreeClientInternal)context;
1989 silc_idlist_del_data(i->client);
1990 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
1994 /* Frees client data and notifies about client's signoff. */
1996 void silc_server_free_client_data(SilcServer server,
1997 SilcSocketConnection sock,
1998 SilcClientEntry client,
2002 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2004 /* If there is pending outgoing data for the client then purge it
2005 to the network before removing the client entry. */
2006 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2007 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2008 server->stat.packets_sent++;
2010 if (sock->outbuf->data - sock->outbuf->head)
2011 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2013 silc_server_packet_send_real(server, sock, TRUE);
2015 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2016 SILC_UNSET_OUTBUF_PENDING(sock);
2017 silc_buffer_clear(sock->outbuf);
2020 /* Send SIGNOFF notify to routers. */
2021 if (notify && !server->standalone && server->router)
2022 silc_server_send_notify_signoff(server, server->router->connection,
2023 server->server_type == SILC_SERVER ?
2024 FALSE : TRUE, client->id,
2025 SILC_ID_CLIENT_LEN, signoff);
2027 /* Remove client from all channels */
2029 silc_server_remove_from_channels(server, NULL, client,
2030 TRUE, signoff, TRUE);
2032 silc_server_remove_from_channels(server, NULL, client,
2033 FALSE, NULL, FALSE);
2035 /* We will not delete the client entry right away. We will take it
2036 into history (for WHOWAS command) for 5 minutes */
2039 silc_task_register(server->timeout_queue, 0,
2040 silc_server_free_client_data_timeout,
2042 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2043 client->data.registered = FALSE;
2045 /* Free the client entry and everything in it */
2046 server->stat.my_clients--;
2047 server->stat.clients--;
2048 if (server->server_type == SILC_ROUTER)
2049 server->stat.cell_clients--;
2052 /* Frees user_data pointer from socket connection object. This also sends
2053 appropriate notify packets to the network to inform about leaving
2056 void silc_server_free_sock_user_data(SilcServer server,
2057 SilcSocketConnection sock)
2059 SILC_LOG_DEBUG(("Start"));
2061 switch(sock->type) {
2062 case SILC_SOCKET_TYPE_CLIENT:
2064 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2065 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2068 case SILC_SOCKET_TYPE_SERVER:
2069 case SILC_SOCKET_TYPE_ROUTER:
2071 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2073 /* Send REMOVE_ID packet to routers. */
2074 if (!server->standalone && server->router)
2075 silc_server_send_notify_server_signoff(server,
2076 server->router->connection,
2077 server->server_type ==
2079 FALSE : TRUE, user_data->id,
2080 SILC_ID_SERVER_LEN);
2082 /* Then also free all client entries that this server owns as
2083 they will become invalid now as well. */
2084 silc_server_remove_clients_by_server(server, user_data);
2086 /* If this was our primary router connection then we're lost to
2087 the outside world. */
2088 if (server->router == user_data) {
2089 server->id_entry->router = NULL;
2090 server->router = NULL;
2091 server->standalone = TRUE;
2094 /* Free the server entry */
2095 silc_idlist_del_data(user_data);
2096 silc_idlist_del_server(server->local_list, user_data);
2097 server->stat.my_servers--;
2098 server->stat.servers--;
2099 if (server->server_type == SILC_ROUTER)
2100 server->stat.cell_servers--;
2105 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2107 silc_idlist_del_data(user_data);
2108 silc_free(user_data);
2113 sock->user_data = NULL;
2116 /* This function is used to remove all client entries by the server `entry'.
2117 This is called when the connection is lost to the server. In this case
2118 we must invalidate all the client entries owned by the server `entry'. */
2120 int silc_server_remove_clients_by_server(SilcServer server,
2121 SilcServerEntry entry)
2123 SilcIDCacheList list = NULL;
2124 SilcIDCacheEntry id_cache = NULL;
2125 SilcClientEntry client = NULL;
2127 SILC_LOG_DEBUG(("Start"));
2129 if (silc_idcache_find_by_id(server->local_list->clients,
2130 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2132 if (silc_idcache_list_first(list, &id_cache)) {
2134 client = (SilcClientEntry)id_cache->context;
2136 if (client->router != entry) {
2137 if (!silc_idcache_list_next(list, &id_cache))
2143 /* Remove the client entry */
2144 silc_server_remove_from_channels(server, NULL, client, TRUE,
2146 silc_idlist_del_client(server->local_list, client);
2148 if (!silc_idcache_list_next(list, &id_cache))
2152 silc_idcache_list_free(list);
2155 if (silc_idcache_find_by_id(server->global_list->clients,
2156 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2158 if (silc_idcache_list_first(list, &id_cache)) {
2160 client = (SilcClientEntry)id_cache->context;
2162 if (client->router != entry) {
2163 if (!silc_idcache_list_next(list, &id_cache))
2169 /* Remove the client entry */
2170 silc_server_remove_from_channels(server, NULL, client, TRUE,
2172 silc_idlist_del_client(server->global_list, client);
2174 if (!silc_idcache_list_next(list, &id_cache))
2178 silc_idcache_list_free(list);
2184 /* Checks whether given channel has global users. If it does this returns
2185 TRUE and FALSE if there is only locally connected clients on the channel. */
2187 int silc_server_channel_has_global(SilcChannelEntry channel)
2189 SilcChannelClientEntry chl;
2191 silc_list_start(channel->user_list);
2192 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2193 if (chl->client->router)
2200 /* Checks whether given channel has locally connected users. If it does this
2201 returns TRUE and FALSE if there is not one locally connected client. */
2203 int silc_server_channel_has_local(SilcChannelEntry channel)
2205 SilcChannelClientEntry chl;
2207 silc_list_start(channel->user_list);
2208 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2209 if (!chl->client->router)
2216 /* Removes client from all channels it has joined. This is used when client
2217 connection is disconnected. If the client on a channel is last, the
2218 channel is removed as well. This sends the SIGNOFF notify types. */
2220 void silc_server_remove_from_channels(SilcServer server,
2221 SilcSocketConnection sock,
2222 SilcClientEntry client,
2224 char *signoff_message,
2227 SilcChannelEntry channel;
2228 SilcChannelClientEntry chl;
2231 SILC_LOG_DEBUG(("Start"));
2233 if (!client || !client->id)
2236 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2238 /* Remove the client from all channels. The client is removed from
2239 the channels' user list. */
2240 silc_list_start(client->channels);
2241 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2242 channel = chl->channel;
2244 /* Remove channel from client's channel list */
2245 silc_list_del(client->channels, chl);
2247 /* Remove channel if there is no users anymore */
2248 if (server->server_type == SILC_ROUTER &&
2249 silc_list_count(channel->user_list) < 2) {
2250 if (!silc_idlist_del_channel(server->local_list, channel))
2251 silc_idlist_del_channel(server->global_list, channel);
2252 server->stat.my_channels--;
2256 /* Remove client from channel's client list */
2257 silc_list_del(channel->user_list, chl);
2259 server->stat.my_chanclients--;
2261 /* If there is no global users on the channel anymore mark the channel
2262 as local channel. */
2263 if (server->server_type == SILC_SERVER &&
2264 !silc_server_channel_has_global(channel))
2265 channel->global_users = FALSE;
2267 /* If there is not at least one local user on the channel then we don't
2268 need the channel entry anymore, we can remove it safely. */
2269 if (server->server_type == SILC_SERVER &&
2270 !silc_server_channel_has_local(channel)) {
2271 /* Notify about leaving client if this channel has global users. */
2272 if (notify && channel->global_users)
2273 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2274 SILC_NOTIFY_TYPE_SIGNOFF,
2275 signoff_message ? 2 : 1,
2276 clidp->data, clidp->len,
2277 signoff_message, signoff_message ?
2278 strlen(signoff_message) : 0);
2280 if (!silc_idlist_del_channel(server->local_list, channel))
2281 silc_idlist_del_channel(server->global_list, channel);
2282 server->stat.my_channels--;
2286 /* Send notify to channel about client leaving SILC and thus
2287 the entire channel. */
2289 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2290 SILC_NOTIFY_TYPE_SIGNOFF,
2291 signoff_message ? 2 : 1,
2292 clidp->data, clidp->len,
2293 signoff_message, signoff_message ?
2294 strlen(signoff_message) : 0);
2297 /* Re-generate channel key */
2298 silc_server_create_channel_key(server, channel, 0);
2300 /* Send the channel key to the channel. The key of course is not sent
2301 to the client who was removed f rom the channel. */
2302 silc_server_send_channel_key(server, client->connection, channel,
2303 server->server_type == SILC_ROUTER ?
2304 FALSE : !server->standalone);
2308 silc_buffer_free(clidp);
2311 /* Removes client from one channel. This is used for example when client
2312 calls LEAVE command to remove itself from the channel. Returns TRUE
2313 if channel still exists and FALSE if the channel is removed when
2314 last client leaves the channel. If `notify' is FALSE notify messages
2317 int silc_server_remove_from_one_channel(SilcServer server,
2318 SilcSocketConnection sock,
2319 SilcChannelEntry channel,
2320 SilcClientEntry client,
2323 SilcChannelEntry ch;
2324 SilcChannelClientEntry chl;
2327 SILC_LOG_DEBUG(("Start"));
2329 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2331 /* Remove the client from the channel. The client is removed from
2332 the channel's user list. */
2333 silc_list_start(client->channels);
2334 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2335 if (chl->channel != channel)
2340 /* Remove channel from client's channel list */
2341 silc_list_del(client->channels, chl);
2343 /* Remove channel if there is no users anymore */
2344 if (server->server_type == SILC_ROUTER &&
2345 silc_list_count(channel->user_list) < 2) {
2346 if (!silc_idlist_del_channel(server->local_list, channel))
2347 silc_idlist_del_channel(server->global_list, channel);
2348 silc_buffer_free(clidp);
2349 server->stat.my_channels--;
2353 /* Remove client from channel's client list */
2354 silc_list_del(channel->user_list, chl);
2356 server->stat.my_chanclients--;
2358 /* If there is no global users on the channel anymore mark the channel
2359 as local channel. */
2360 if (server->server_type == SILC_SERVER &&
2361 !silc_server_channel_has_global(channel))
2362 channel->global_users = FALSE;
2364 /* If there is not at least one local user on the channel then we don't
2365 need the channel entry anymore, we can remove it safely. */
2366 if (server->server_type == SILC_SERVER &&
2367 !silc_server_channel_has_local(channel)) {
2368 /* Notify about leaving client if this channel has global users. */
2369 if (notify && channel->global_users)
2370 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2371 SILC_NOTIFY_TYPE_LEAVE, 1,
2372 clidp->data, clidp->len);
2374 if (!silc_idlist_del_channel(server->local_list, channel))
2375 silc_idlist_del_channel(server->global_list, channel);
2376 silc_buffer_free(clidp);
2377 server->stat.my_channels--;
2381 /* Send notify to channel about client leaving the channel */
2383 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2384 SILC_NOTIFY_TYPE_LEAVE, 1,
2385 clidp->data, clidp->len);
2389 silc_buffer_free(clidp);
2393 /* Returns TRUE if the given client is on the channel. FALSE if not.
2394 This works because we assure that the user list on the channel is
2395 always in up to date thus we can only check the channel list from
2396 `client' which is faster than checking the user list from `channel'. */
2398 int silc_server_client_on_channel(SilcClientEntry client,
2399 SilcChannelEntry channel)
2401 SilcChannelClientEntry chl;
2403 if (!client || !channel)
2406 silc_list_start(client->channels);
2407 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2408 if (chl->channel == channel)
2414 /* Timeout callback. This is called if connection is idle or for some
2415 other reason is not responding within some period of time. This
2416 disconnects the remote end. */
2418 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2420 SilcServer server = (SilcServer)context;
2421 SilcSocketConnection sock = server->sockets[fd];
2426 if (sock->user_data)
2427 silc_server_free_sock_user_data(server, sock);
2429 silc_server_disconnect_remote(server, sock,
2430 "Server closed connection: "
2431 "Connection timeout");
2434 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2435 function may be used only by router. In real SILC network all channels
2436 are created by routers thus this function is never used by normal
2439 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2440 SilcServerID *router_id,
2446 SilcChannelID *channel_id;
2447 SilcChannelEntry entry;
2451 SILC_LOG_DEBUG(("Creating new channel"));
2454 cipher = "aes-256-cbc";
2456 hmac = "hmac-sha1-96";
2458 /* Allocate cipher */
2459 if (!silc_cipher_alloc(cipher, &key))
2463 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2464 silc_cipher_free(key);
2468 channel_name = strdup(channel_name);
2470 /* Create the channel */
2471 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2472 entry = silc_idlist_add_channel(server->local_list, channel_name,
2473 SILC_CHANNEL_MODE_NONE, channel_id,
2474 NULL, key, newhmac);
2476 silc_free(channel_name);
2480 entry->cipher = strdup(cipher);
2481 entry->hmac_name = strdup(hmac);
2483 /* Now create the actual key material */
2484 silc_server_create_channel_key(server, entry,
2485 silc_cipher_get_key_len(key) / 8);
2487 /* Notify other routers about the new channel. We send the packet
2488 to our primary route. */
2489 if (broadcast && server->standalone == FALSE)
2490 silc_server_send_new_channel(server, server->router->connection, TRUE,
2491 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2494 server->stat.my_channels++;
2499 /* Same as above but creates the channel with Channel ID `channel_id. */
2502 silc_server_create_new_channel_with_id(SilcServer server,
2506 SilcChannelID *channel_id,
2509 SilcChannelEntry entry;
2513 SILC_LOG_DEBUG(("Creating new channel"));
2516 cipher = "aes-256-cbc";
2518 hmac = "hmac-sha1-96";
2520 /* Allocate cipher */
2521 if (!silc_cipher_alloc(cipher, &key))
2525 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2526 silc_cipher_free(key);
2530 channel_name = strdup(channel_name);
2532 /* Create the channel */
2533 entry = silc_idlist_add_channel(server->local_list, channel_name,
2534 SILC_CHANNEL_MODE_NONE, channel_id,
2535 NULL, key, newhmac);
2537 silc_free(channel_name);
2541 /* Now create the actual key material */
2542 silc_server_create_channel_key(server, entry,
2543 silc_cipher_get_key_len(key) / 8);
2545 /* Notify other routers about the new channel. We send the packet
2546 to our primary route. */
2547 if (broadcast && server->standalone == FALSE)
2548 silc_server_send_new_channel(server, server->router->connection, TRUE,
2549 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2552 server->stat.my_channels++;
2557 /* Generates new channel key. This is used to create the initial channel key
2558 but also to re-generate new key for channel. If `key_len' is provided
2559 it is the bytes of the key length. */
2561 void silc_server_create_channel_key(SilcServer server,
2562 SilcChannelEntry channel,
2563 unsigned int key_len)
2566 unsigned char channel_key[32], hash[32];
2569 SILC_LOG_DEBUG(("Generating channel key"));
2571 if (!channel->channel_key)
2572 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2577 else if (channel->key_len)
2578 len = channel->key_len / 8;
2580 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2582 /* Create channel key */
2583 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2586 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2588 /* Remove old key if exists */
2590 memset(channel->key, 0, channel->key_len / 8);
2591 silc_free(channel->key);
2595 channel->key_len = len * 8;
2596 channel->key = silc_calloc(len, sizeof(*channel->key));
2597 memcpy(channel->key, channel_key, len);
2598 memset(channel_key, 0, sizeof(channel_key));
2600 /* Generate HMAC key from the channel key data and set it */
2602 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2603 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2604 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2605 memset(hash, 0, sizeof(hash));
2608 /* Saves the channel key found in the encoded `key_payload' buffer. This
2609 function is used when we receive Channel Key Payload and also when we're
2610 processing JOIN command reply. Returns entry to the channel. */
2612 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2613 SilcBuffer key_payload,
2614 SilcChannelEntry channel)
2616 SilcChannelKeyPayload payload = NULL;
2617 SilcChannelID *id = NULL;
2618 unsigned char *tmp, hash[32];
2619 unsigned int tmp_len;
2622 /* Decode channel key payload */
2623 payload = silc_channel_key_payload_parse(key_payload);
2625 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2630 /* Get the channel entry */
2633 /* Get channel ID */
2634 tmp = silc_channel_key_get_id(payload, &tmp_len);
2635 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2641 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2643 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2645 SILC_LOG_ERROR(("Received key for non-existent channel"));
2651 tmp = silc_channel_key_get_key(payload, &tmp_len);
2657 cipher = silc_channel_key_get_cipher(payload, NULL);
2663 /* Remove old key if exists */
2665 memset(channel->key, 0, channel->key_len / 8);
2666 silc_free(channel->key);
2667 silc_cipher_free(channel->channel_key);
2670 /* Create new cipher */
2671 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2676 if (channel->cipher)
2677 silc_free(channel->cipher);
2678 channel->cipher = strdup(cipher);
2681 channel->key_len = tmp_len * 8;
2682 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2683 memcpy(channel->key, tmp, tmp_len);
2684 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2686 /* Generate HMAC key from the channel key data and set it */
2688 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2689 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2690 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2692 memset(hash, 0, sizeof(hash));
2693 memset(tmp, 0, tmp_len);
2699 silc_channel_key_payload_free(payload);
2704 /* Heartbeat callback. This function is set as argument for the
2705 silc_socket_set_heartbeat function. The library will call this function
2706 at the set time interval. */
2708 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2711 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2713 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2716 /* Send the heartbeat */
2717 silc_server_send_heartbeat(hb->server, sock);
2720 /* Returns assembled of all servers in the given ID list. The packet's
2721 form is dictated by the New ID payload. */
2723 static void silc_server_announce_get_servers(SilcServer server,
2725 SilcBuffer *servers)
2727 SilcIDCacheList list;
2728 SilcIDCacheEntry id_cache;
2729 SilcServerEntry entry;
2732 /* Go through all clients in the list */
2733 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2734 SILC_ID_SERVER, &list)) {
2735 if (silc_idcache_list_first(list, &id_cache)) {
2737 entry = (SilcServerEntry)id_cache->context;
2739 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2741 *servers = silc_buffer_realloc(*servers,
2743 (*servers)->truelen + idp->len :
2745 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2746 silc_buffer_put(*servers, idp->data, idp->len);
2747 silc_buffer_pull(*servers, idp->len);
2748 silc_buffer_free(idp);
2750 if (!silc_idcache_list_next(list, &id_cache))
2755 silc_idcache_list_free(list);
2759 /* This function is used by router to announce existing servers to our
2760 primary router when we've connected to it. */
2762 void silc_server_announce_servers(SilcServer server)
2764 SilcBuffer servers = NULL;
2766 SILC_LOG_DEBUG(("Announcing servers"));
2768 /* Get servers in local list */
2769 silc_server_announce_get_servers(server, server->local_list, &servers);
2771 /* Get servers in global list */
2772 silc_server_announce_get_servers(server, server->global_list, &servers);
2775 silc_buffer_push(servers, servers->data - servers->head);
2776 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2778 /* Send the packet */
2779 silc_server_packet_send(server, server->router->connection,
2780 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2781 servers->data, servers->len, TRUE);
2783 silc_buffer_free(servers);
2787 /* Returns assembled packet of all clients in the given ID list. The
2788 packet's form is dictated by the New ID Payload. */
2790 static void silc_server_announce_get_clients(SilcServer server,
2792 SilcBuffer *clients)
2794 SilcIDCacheList list;
2795 SilcIDCacheEntry id_cache;
2796 SilcClientEntry client;
2799 /* Go through all clients in the list */
2800 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2801 SILC_ID_CLIENT, &list)) {
2802 if (silc_idcache_list_first(list, &id_cache)) {
2804 client = (SilcClientEntry)id_cache->context;
2806 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2808 *clients = silc_buffer_realloc(*clients,
2810 (*clients)->truelen + idp->len :
2812 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
2813 silc_buffer_put(*clients, idp->data, idp->len);
2814 silc_buffer_pull(*clients, idp->len);
2815 silc_buffer_free(idp);
2817 if (!silc_idcache_list_next(list, &id_cache))
2822 silc_idcache_list_free(list);
2826 /* This function is used to announce our existing clients to our router
2827 when we've connected to it. */
2829 void silc_server_announce_clients(SilcServer server)
2831 SilcBuffer clients = NULL;
2833 SILC_LOG_DEBUG(("Announcing clients"));
2835 /* Get clients in local list */
2836 silc_server_announce_get_clients(server, server->local_list,
2839 /* As router we announce our global list as well */
2840 if (server->server_type == SILC_ROUTER)
2841 silc_server_announce_get_clients(server, server->global_list,
2845 silc_buffer_push(clients, clients->data - clients->head);
2846 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
2848 /* Send the packet */
2849 silc_server_packet_send(server, server->router->connection,
2850 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
2851 clients->data, clients->len, TRUE);
2853 silc_buffer_free(clients);
2858 silc_server_announce_encode_join(unsigned int argc, ...)
2863 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
2866 /* Returns assembled packets for all channels and users on those channels
2867 from the given ID List. The packets are in the form dictated by the
2868 New Channel and New Channel User payloads. */
2870 static void silc_server_announce_get_channels(SilcServer server,
2872 SilcBuffer *channels,
2873 SilcBuffer *channel_users)
2875 SilcIDCacheList list;
2876 SilcIDCacheEntry id_cache;
2877 SilcChannelEntry channel;
2878 SilcChannelClientEntry chl;
2881 unsigned short name_len;
2884 /* Go through all channels in the list */
2885 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
2886 SILC_ID_CHANNEL, &list)) {
2887 if (silc_idcache_list_first(list, &id_cache)) {
2889 channel = (SilcChannelEntry)id_cache->context;
2891 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
2892 name_len = strlen(channel->channel_name);
2894 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
2896 silc_buffer_realloc(*channels,
2897 (*channels ? (*channels)->truelen + len : len));
2898 silc_buffer_pull_tail(*channels,
2899 ((*channels)->end - (*channels)->data));
2900 silc_buffer_format(*channels,
2901 SILC_STR_UI_SHORT(name_len),
2902 SILC_STR_UI_XNSTRING(channel->channel_name,
2904 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2905 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
2908 silc_buffer_pull(*channels, len);
2910 /* Now find all users on the channel */
2911 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
2912 silc_list_start(channel->user_list);
2913 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2917 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
2919 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
2920 chidp->data, chidp->len);
2923 silc_buffer_realloc(*channel_users,
2925 (*channel_users)->truelen + len : len));
2926 silc_buffer_pull_tail(*channel_users,
2927 ((*channel_users)->end -
2928 (*channel_users)->data));
2930 silc_buffer_put(*channel_users, tmp->data, tmp->len);
2931 silc_buffer_pull(*channel_users, len);
2932 silc_buffer_free(clidp);
2933 silc_buffer_free(tmp);
2935 silc_buffer_free(chidp);
2939 if (!silc_idcache_list_next(list, &id_cache))
2944 silc_idcache_list_free(list);
2948 /* This function is used to announce our existing channels to our router
2949 when we've connected to it. This also announces the users on the
2950 channels to the router. */
2952 void silc_server_announce_channels(SilcServer server)
2954 SilcBuffer channels = NULL, channel_users = NULL;
2956 SILC_LOG_DEBUG(("Announcing channels and channel users"));
2958 /* Get channels and channel users in local list */
2959 silc_server_announce_get_channels(server, server->local_list,
2960 &channels, &channel_users);
2962 /* Get channels and channel users in global list */
2963 silc_server_announce_get_channels(server, server->global_list,
2964 &channels, &channel_users);
2967 silc_buffer_push(channels, channels->data - channels->head);
2968 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
2970 /* Send the packet */
2971 silc_server_packet_send(server, server->router->connection,
2972 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
2973 channels->data, channels->len,
2976 silc_buffer_free(channels);
2979 if (channel_users) {
2980 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
2981 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
2982 channel_users->len);
2984 /* Send the packet */
2985 silc_server_packet_send(server, server->router->connection,
2986 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
2987 channel_users->data, channel_users->len,
2990 silc_buffer_free(channel_users);
2994 /* Failure timeout callback. If this is called then we will immediately
2995 process the received failure. We always process the failure with timeout
2996 since we do not want to blindly trust to received failure packets.
2997 This won't be called (the timeout is cancelled) if the failure was
2998 bogus (it is bogus if remote does not close the connection after sending
3001 SILC_TASK_CALLBACK(silc_server_failure_callback)
3003 SilcServerFailureContext f = (SilcServerFailureContext)context;
3005 if (f->sock->protocol) {
3006 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3007 f->sock->protocol->execute(f->server->timeout_queue, 0,
3008 f->sock->protocol, f->sock->sock, 0, 0);
3014 /* Assembles user list and users mode list from the `channel'. */
3016 void silc_server_get_users_on_channel(SilcServer server,
3017 SilcChannelEntry channel,
3018 SilcBuffer *user_list,
3019 SilcBuffer *mode_list,
3020 unsigned int *user_count)
3022 SilcChannelClientEntry chl;
3023 SilcBuffer client_id_list;
3024 SilcBuffer client_mode_list;
3026 unsigned int list_count = 0;
3028 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3029 silc_list_count(channel->user_list));
3030 client_mode_list = silc_buffer_alloc(4 *
3031 silc_list_count(channel->user_list));
3032 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3033 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3034 silc_list_start(channel->user_list);
3035 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3037 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3038 silc_buffer_put(client_id_list, idp->data, idp->len);
3039 silc_buffer_pull(client_id_list, idp->len);
3040 silc_buffer_free(idp);
3042 /* Client's mode on channel */
3043 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3044 silc_buffer_pull(client_mode_list, 4);
3048 silc_buffer_push(client_id_list,
3049 client_id_list->data - client_id_list->head);
3050 silc_buffer_push(client_mode_list,
3051 client_mode_list->data - client_mode_list->head);
3053 *user_list = client_id_list;
3054 *mode_list = client_mode_list;
3055 *user_count = list_count;
3058 /* Saves users and their modes to the `channel'. */
3060 void silc_server_save_users_on_channel(SilcServer server,
3061 SilcSocketConnection sock,
3062 SilcChannelEntry channel,
3063 SilcClientID *noadd,
3064 SilcBuffer user_list,
3065 SilcBuffer mode_list,
3066 unsigned int user_count)
3070 /* Cache the received Client ID's and modes. This cache expires
3071 whenever server sends notify message to channel. It means two things;
3072 some user has joined or leaved the channel. XXX TODO! */
3073 for (i = 0; i < user_count; i++) {
3074 unsigned short idp_len;
3076 SilcClientID *client_id;
3077 SilcClientEntry client;
3080 SILC_GET16_MSB(idp_len, user_list->data + 2);
3082 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3083 silc_buffer_pull(user_list, idp_len);
3088 SILC_GET32_MSB(mode, mode_list->data);
3089 silc_buffer_pull(mode_list, 4);
3091 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3092 silc_free(client_id);
3096 /* Check if we have this client cached already. */
3097 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3100 client = silc_idlist_find_client_by_id(server->global_list,
3103 /* If router did not find such Client ID in its lists then this must
3104 be bogus client or some router in the net is buggy. */
3105 if (server->server_type == SILC_ROUTER) {
3106 silc_free(client_id);
3110 /* We don't have that client anywhere, add it. The client is added
3111 to global list since server didn't have it in the lists so it must be
3113 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3115 silc_id_dup(client_id, SILC_ID_CLIENT),
3116 sock->user_data, NULL);
3118 silc_free(client_id);
3122 client->data.registered = TRUE;
3125 silc_free(client_id);
3127 if (!silc_server_client_on_channel(client, channel)) {
3128 /* Client was not on the channel, add it. */
3129 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3130 chl->client = client;
3132 chl->channel = channel;
3133 silc_list_add(channel->user_list, chl);
3134 silc_list_add(client->channels, chl);
3139 /* Lookups route to the client indicated by `id' client ID. The connection
3140 object and internal data object is returned. Returns NULL if route
3141 could not be found to the client. If the `client_id' is specified then
3142 it is used and the `id_data' is ignored. */
3144 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3145 unsigned char *id_data,
3146 unsigned int id_len,
3147 SilcClientID *client_id,
3148 SilcIDListData *idata)
3151 SilcClientEntry client;
3153 SILC_LOG_DEBUG(("Start"));
3155 /* Decode destination Client ID */
3157 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3159 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3163 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3166 /* If the destination belongs to our server we don't have to route
3167 the packet anywhere but to send it to the local destination. */
3168 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3172 if (client && client->data.registered == FALSE)
3175 /* If we are router and the client has router then the client is in
3176 our cell but not directly connected to us. */
3177 if (server->server_type == SILC_ROUTER && client->router) {
3178 /* We are of course in this case the client's router thus the real
3179 "router" of the client is the server who owns the client. Thus
3180 we will send the packet to that server. */
3181 *idata = (SilcIDListData)client->router;
3182 return client->router->connection;
3185 /* Seems that client really is directly connected to us */
3186 *idata = (SilcIDListData)client;
3187 return client->connection;
3190 /* Destination belongs to someone not in this server. If we are normal
3191 server our action is to send the packet to our router. */
3192 if (server->server_type == SILC_SERVER && !server->standalone) {
3194 *idata = (SilcIDListData)server->router;
3195 return server->router->connection;
3198 /* We are router and we will perform route lookup for the destination
3199 and send the packet to fastest route. */
3200 if (server->server_type == SILC_ROUTER && !server->standalone) {
3201 /* Check first that the ID is valid */
3202 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3204 SilcSocketConnection dst_sock;
3206 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3209 *idata = (SilcIDListData)dst_sock->user_data;
3218 /* Encodes and returns channel list of channels the `client' has joined.
3219 Secret channels are not put to the list. */
3221 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3222 SilcClientEntry client)
3224 SilcBuffer buffer = NULL;
3225 SilcChannelEntry channel;
3226 SilcChannelClientEntry chl;
3228 unsigned short name_len;
3231 silc_list_start(client->channels);
3232 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3233 channel = chl->channel;
3235 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3238 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3239 name_len = strlen(channel->channel_name);
3241 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3242 buffer = silc_buffer_realloc(buffer,
3243 (buffer ? (buffer)->truelen + len : len));
3244 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3245 silc_buffer_format(buffer,
3246 SILC_STR_UI_SHORT(name_len),
3247 SILC_STR_UI_XNSTRING(channel->channel_name,
3249 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3250 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3251 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3253 silc_buffer_pull(buffer, len);
3258 silc_buffer_push(buffer, buffer->data - buffer->head);
3263 /* Finds client entry by Client ID and if it is not found then resolves
3264 it using WHOIS command. */
3266 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3267 SilcClientID *client_id)
3269 SilcClientEntry client;
3271 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3273 client = silc_idlist_find_client_by_id(server->global_list,
3275 if (!client && server->server_type == SILC_ROUTER)
3279 if (!client && server->standalone)
3282 if (!client || !client->nickname || !client->username) {
3283 SilcBuffer buffer, idp;
3285 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3286 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3287 ++server->cmd_ident, 1,
3288 3, idp->data, idp->len);
3289 silc_server_packet_send(server, client ? client->router->connection :
3290 server->router->connection,
3291 SILC_PACKET_COMMAND, 0,
3292 buffer->data, buffer->len, FALSE);
3293 silc_buffer_free(idp);
3294 silc_buffer_free(buffer);