5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
21 * This is the actual SILC server than handles everything relating to
22 * servicing the SILC connections. This is also a SILC router as a router
23 * is also normal server.
27 #include "serverincludes.h"
28 #include "server_internal.h"
30 /* Static prototypes */
31 SILC_TASK_CALLBACK(silc_server_connect_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
34 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
37 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
38 SILC_TASK_CALLBACK(silc_server_packet_process);
39 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
40 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 SILC_TASK_CALLBACK(silc_server_failure_callback);
43 /* Allocates a new SILC server object. This has to be done before the server
44 can be used. After allocation one must call silc_server_init to initialize
45 the server. The new allocated server object is returned to the new_server
48 int silc_server_alloc(SilcServer *new_server)
52 SILC_LOG_DEBUG(("Allocating new server object"));
54 server = silc_calloc(1, sizeof(*server));
55 server->server_type = SILC_SERVER;
56 server->standalone = TRUE;
57 server->local_list = silc_calloc(1, sizeof(*server->local_list));
58 server->global_list = silc_calloc(1, sizeof(*server->global_list));
59 server->pending_commands = silc_dlist_init();
61 server->sim = silc_dlist_init();
69 /* Free's the SILC server object. This is called at the very end before
72 void silc_server_free(SilcServer server)
79 if (server->local_list)
80 silc_free(server->local_list);
81 if (server->global_list)
82 silc_free(server->global_list);
84 silc_rng_free(server->rng);
87 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
88 silc_dlist_del(server->sim, sim);
91 silc_dlist_uninit(server->sim);
95 silc_free(server->params);
97 if (server->pending_commands)
98 silc_dlist_uninit(server->pending_commands);
104 /* Initializes the entire SILC server. This is called always before running
105 the server. This is called only once at the initialization of the program.
106 This binds the server to its listenning port. After this function returns
107 one should call silc_server_run to start the server. This returns TRUE
108 when everything is ok to run the server. Configuration file must be
109 read and parsed before calling this. */
111 int silc_server_init(SilcServer server)
113 int *sock = NULL, sock_count = 0, i;
115 SilcServerEntry id_entry;
116 SilcIDListPurge purge;
118 SILC_LOG_DEBUG(("Initializing server"));
120 assert(server->config);
122 /* XXX After server is made as Silc Server Library this can be given
123 as argument, for now this is hard coded */
124 server->params = silc_calloc(1, sizeof(*server->params));
125 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
126 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
127 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
128 server->params->retry_keep_trying = FALSE;
129 server->params->protocol_timeout = 60;
130 server->params->require_reverse_mapping = FALSE;
132 /* Set log files where log message should be saved. */
133 server->config->server = server;
134 silc_server_config_setlogfiles(server->config);
136 /* Register all configured ciphers, PKCS and hash functions. */
137 silc_server_config_register_ciphers(server->config);
138 silc_server_config_register_pkcs(server->config);
139 silc_server_config_register_hashfuncs(server->config);
140 silc_server_config_register_hmacs(server->config);
142 /* Initialize random number generator for the server. */
143 server->rng = silc_rng_alloc();
144 silc_rng_init(server->rng);
145 silc_rng_global_init(server->rng);
147 /* Initialize hash functions for server to use */
148 silc_hash_alloc("md5", &server->md5hash);
149 silc_hash_alloc("sha1", &server->sha1hash);
151 /* Initialize none cipher */
152 silc_cipher_alloc("none", &server->none_cipher);
154 /* XXXXX Generate RSA key pair */
156 unsigned char *public_key;
157 unsigned char *private_key;
158 unsigned int pk_len, prv_len;
161 if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
163 if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
164 SILC_LOG_ERROR(("Could not create RSA key pair"));
168 if (server->pkcs->pkcs->init(server->pkcs->context,
169 1024, server->rng) == FALSE) {
170 SILC_LOG_ERROR(("Could not generate RSA key pair"));
174 public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
176 private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
179 SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
180 SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
183 silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
185 server->private_key =
186 silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
189 silc_pkcs_save_public_key("pubkey.pub", server->public_key,
191 silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
194 memset(public_key, 0, pk_len);
195 memset(private_key, 0, prv_len);
196 silc_free(public_key);
197 silc_free(private_key);
199 silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
201 silc_pkcs_load_private_key("privkey.prv", &server->private_key,
206 /* Create a listening server. Note that our server can listen on
207 multiple ports. All listeners are created here and now. */
208 /* XXX Still check this whether to use server_info or listen_port. */
210 while(server->config->listen_port) {
213 tmp = silc_net_create_server(server->config->listen_port->port,
214 server->config->listen_port->host);
218 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
219 sock[sock_count] = tmp;
220 server->config->listen_port = server->config->listen_port->next;
224 /* Initialize ID caches */
225 server->local_list->clients =
226 silc_idcache_alloc(0, silc_idlist_client_destructor);
227 server->local_list->servers = silc_idcache_alloc(0, NULL);
228 server->local_list->channels = silc_idcache_alloc(0, NULL);
230 /* These are allocated for normal server as well as these hold some
231 global information that the server has fetched from its router. For
232 router these are used as they are supposed to be used on router. */
233 server->global_list->clients =
234 silc_idcache_alloc(0, silc_idlist_client_destructor);
235 server->global_list->servers = silc_idcache_alloc(0, NULL);
236 server->global_list->channels = silc_idcache_alloc(0, NULL);
238 /* Allocate the entire socket list that is used in server. Eventually
239 all connections will have entry in this table (it is a table of
240 pointers to the actual object that is allocated individually
242 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
243 sizeof(*server->sockets));
245 for (i = 0; i < sock_count; i++) {
246 SilcSocketConnection newsocket = NULL;
248 /* Set socket to non-blocking mode */
249 silc_net_set_socket_nonblock(sock[i]);
250 server->sock = sock[i];
252 /* Create a Server ID for the server. */
253 silc_id_create_server_id(sock[i], server->rng, &id);
259 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
260 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
261 server->id_type = SILC_ID_SERVER;
262 server->server_name = server->config->server_info->server_name;
264 /* Add ourselves to the server list. We don't have a router yet
265 beacuse we haven't established a route yet. It will be done later.
266 For now, NULL is sent as router. This allocates new entry to
269 silc_idlist_add_server(server->local_list,
270 server->config->server_info->server_name,
271 server->server_type, server->id, NULL, NULL);
273 SILC_LOG_ERROR(("Could not add ourselves to cache"));
277 /* Add ourselves also to the socket table. The entry allocated above
278 is sent as argument for fast referencing in the future. */
279 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
282 server->sockets[sock[i]] = newsocket;
284 /* Put the allocated socket pointer also to the entry allocated above
285 for fast back-referencing to the socket list. */
286 id_entry->connection = (void *)server->sockets[sock[i]];
287 server->id_entry = id_entry;
290 /* Register the task queues. In SILC we have by default three task queues.
291 One task queue for non-timeout tasks which perform different kind of
292 I/O on file descriptors, timeout task queue for timeout tasks, and,
293 generic non-timeout task queue whose tasks apply to all connections. */
294 silc_task_queue_alloc(&server->io_queue, TRUE);
295 if (!server->io_queue) {
298 silc_task_queue_alloc(&server->timeout_queue, TRUE);
299 if (!server->timeout_queue) {
302 silc_task_queue_alloc(&server->generic_queue, TRUE);
303 if (!server->generic_queue) {
307 /* Register protocols */
308 silc_server_protocols_register();
310 /* Initialize the scheduler */
311 silc_schedule_init(&server->io_queue, &server->timeout_queue,
312 &server->generic_queue,
313 SILC_SERVER_MAX_CONNECTIONS);
315 /* Add the first task to the queue. This is task that is executed by
316 timeout. It expires as soon as the caller calls silc_server_run. This
317 task performs authentication protocol and key exchange with our
319 silc_task_register(server->timeout_queue, sock[0],
320 silc_server_connect_to_router,
321 (void *)server, 0, 1,
323 SILC_TASK_PRI_NORMAL);
325 /* Add listener task to the queue. This task receives new connections to the
326 server. This task remains on the queue until the end of the program. */
327 silc_task_register(server->io_queue, sock[0],
328 silc_server_accept_new_connection,
329 (void *)server, 0, 0,
331 SILC_TASK_PRI_NORMAL);
332 server->listenning = TRUE;
334 /* If server connections has been configured then we must be router as
335 normal server cannot have server connections, only router connections. */
336 if (server->config->servers)
337 server->server_type = SILC_ROUTER;
339 /* Register the ID Cache purge task. This periodically purges the ID cache
340 and removes the expired cache entries. */
342 /* Clients local list */
343 purge = silc_calloc(1, sizeof(*purge));
344 purge->cache = server->local_list->clients;
345 purge->timeout_queue = server->timeout_queue;
346 silc_task_register(purge->timeout_queue, 0,
348 (void *)purge, 600, 0,
349 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
351 /* Clients global list */
352 purge = silc_calloc(1, sizeof(*purge));
353 purge->cache = server->global_list->clients;
354 purge->timeout_queue = server->timeout_queue;
355 silc_task_register(purge->timeout_queue, 0,
357 (void *)purge, 300, 0,
358 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
360 SILC_LOG_DEBUG(("Server initialized"));
362 /* We are done here, return succesfully */
365 silc_task_queue_free(server->timeout_queue);
367 silc_task_queue_free(server->io_queue);
369 for (i = 0; i < sock_count; i++)
370 silc_net_close_server(sock[i]);
375 /* Fork server to background and set gid+uid to non-root.
376 Silcd will not run as root, so trying to set either user or group to
377 root will cause silcd to exit. */
379 void silc_server_daemonise(SilcServer server)
381 /* Are we executing silcd as root or a regular user? */
388 if (!server->config->identity || !server->config->identity->user ||
389 !server->config->identity->group) {
390 fprintf(stderr, "Error:"
391 "\tSILC server must not be run as root. For the security of your\n"
392 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
393 "\tuser account. Modify the [Identity] configuration section to run\n"
394 "\tthe server as non-root user.\n");
398 /* Get the values given for user and group in configuration file */
399 user=server->config->identity->user;
400 group=server->config->identity->group;
402 /* Check whether the user/group information is text */
403 if (atoi(user)!=0 || atoi(group)!=0) {
404 SILC_LOG_DEBUG(("Invalid user and/or group information"));
405 SILC_LOG_DEBUG(("User and/or group given as number"));
406 fprintf(stderr, "Invalid user and/or group information\n");
407 fprintf(stderr, "Please assign them as names, not numbers\n");
411 /* Catch the nasty incident of string "0" returning 0 from atoi */
412 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
413 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
414 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
422 fprintf(stderr, "No such user %s found\n", user);
427 fprintf(stderr, "No such group %s found\n", group);
431 /* Check whether user and/or group is set to root. If yes, exit
432 immediately. Otherwise, setgid and setuid server to user.group */
433 if (gr->gr_gid==0 || pw->pw_uid==0) {
434 fprintf(stderr, "Error:"
435 "\tSILC server must not be run as root. For the security of your\n"
436 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
437 "\tuser account. Modify the [Identity] configuration section to run\n"
438 "\tthe server as non-root user.\n");
441 /* Fork server to background, making it a daemon */
443 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
444 SILC_LOG_DEBUG(("Forking SILC server to background"));
449 SILC_LOG_DEBUG(("Changing to group %s", group));
450 if(setgid(gr->gr_gid)==0) {
451 SILC_LOG_DEBUG(("Setgid to %s", group));
453 SILC_LOG_DEBUG(("Setgid to %s failed", group));
454 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
458 SILC_LOG_DEBUG(("Changing to user nobody"));
459 if(setuid(pw->pw_uid)==0) {
460 SILC_LOG_DEBUG(("Setuid to %s", user));
462 SILC_LOG_DEBUG(("Setuid to %s failed", user));
463 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
469 /* Fork server to background, making it a daemon */
471 SILC_LOG_DEBUG(("Server started as user"));
472 SILC_LOG_DEBUG(("Forking SILC server to background"));
479 /* Stops the SILC server. This function is used to shutdown the server.
480 This is usually called after the scheduler has returned. After stopping
481 the server one should call silc_server_free. */
483 void silc_server_stop(SilcServer server)
485 SILC_LOG_DEBUG(("Stopping server"));
487 /* Stop the scheduler, although it might be already stopped. This
488 doesn't hurt anyone. This removes all the tasks and task queues,
490 silc_schedule_stop();
491 silc_schedule_uninit();
493 silc_server_protocols_unregister();
495 SILC_LOG_DEBUG(("Server stopped"));
498 /* The heart of the server. This runs the scheduler thus runs the server.
499 When this returns the server has been stopped and the program will
502 void silc_server_run(SilcServer server)
504 SILC_LOG_DEBUG(("Running server"));
506 /* Start the scheduler, the heart of the SILC server. When this returns
507 the program will be terminated. */
511 /* Timeout callback that will be called to retry connecting to remote
512 router. This is used by both normal and router server. This will wait
513 before retrying the connecting. The timeout is generated by exponential
514 backoff algorithm. */
516 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
518 SilcServerConnection sconn = (SilcServerConnection)context;
519 SilcServer server = sconn->server;
521 SILC_LOG_INFO(("Retrying connecting to a router"));
523 /* Calculate next timeout */
524 if (sconn->retry_count >= 1) {
525 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
526 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
527 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
529 sconn->retry_timeout = server->params->retry_interval_min;
531 sconn->retry_count++;
532 sconn->retry_timeout = sconn->retry_timeout +
533 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
535 /* If we've reached max retry count, give up. */
536 if (sconn->retry_count > server->params->retry_count &&
537 server->params->retry_keep_trying == FALSE) {
538 SILC_LOG_ERROR(("Could not connect to router, giving up"));
542 /* Wait one before retrying */
543 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
544 context, sconn->retry_timeout,
545 server->params->retry_interval_min_usec,
546 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
549 /* Generic routine to use connect to a router. */
551 SILC_TASK_CALLBACK(silc_server_connect_router)
553 SilcServerConnection sconn = (SilcServerConnection)context;
554 SilcServer server = sconn->server;
555 SilcSocketConnection newsocket;
556 SilcProtocol protocol;
557 SilcServerKEInternalContext *proto_ctx;
560 /* Connect to remote host */
561 sock = silc_net_create_connection(sconn->remote_port,
564 SILC_LOG_ERROR(("Could not connect to router"));
565 silc_task_register(server->timeout_queue, fd,
566 silc_server_connect_to_router_retry,
567 context, 0, 1, SILC_TASK_TIMEOUT,
568 SILC_TASK_PRI_NORMAL);
572 /* Set socket options */
573 silc_net_set_socket_nonblock(sock);
574 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
576 /* Create socket connection for the connection. Even though we
577 know that we are connecting to a router we will mark the socket
578 to be unknown connection until we have executed authentication
580 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
581 server->sockets[sock] = newsocket;
582 newsocket->hostname = strdup(sconn->remote_host);
583 newsocket->ip = strdup(sconn->remote_host);
584 newsocket->port = sconn->remote_port;
585 sconn->sock = newsocket;
587 /* Allocate internal protocol context. This is sent as context
589 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
590 proto_ctx->server = (void *)server;
591 proto_ctx->context = (void *)sconn;
592 proto_ctx->sock = newsocket;
593 proto_ctx->rng = server->rng;
594 proto_ctx->responder = FALSE;
596 /* Perform key exchange protocol. silc_server_connect_to_router_second
597 will be called after the protocol is finished. */
598 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
599 &protocol, proto_ctx,
600 silc_server_connect_to_router_second);
601 newsocket->protocol = protocol;
603 /* Register a timeout task that will be executed if the protocol
604 is not executed within set limit. */
605 proto_ctx->timeout_task =
606 silc_task_register(server->timeout_queue, sock,
607 silc_server_timeout_remote,
608 server, server->params->protocol_timeout,
609 server->params->protocol_timeout_usec,
613 /* Register the connection for network input and output. This sets
614 that scheduler will listen for incoming packets for this connection
615 and sets that outgoing packets may be sent to this connection as
616 well. However, this doesn't set the scheduler for outgoing traffic,
617 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
618 later when outgoing data is available. */
619 context = (void *)server;
620 SILC_REGISTER_CONNECTION_FOR_IO(sock);
622 /* Run the protocol */
623 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
626 /* This function connects to our primary router or if we are a router this
627 establishes all our primary routes. This is called at the start of the
628 server to do authentication and key exchange with our router - called
631 SILC_TASK_CALLBACK(silc_server_connect_to_router)
633 SilcServer server = (SilcServer)context;
634 SilcServerConnection sconn;
636 SILC_LOG_DEBUG(("Connecting to router(s)"));
638 /* If we are normal SILC server we need to connect to our cell's
640 if (server->server_type == SILC_SERVER) {
641 SILC_LOG_DEBUG(("We are normal server"));
643 /* Create connection to the router, if configured. */
644 if (server->config->routers) {
646 /* Allocate connection object for hold connection specific stuff. */
647 sconn = silc_calloc(1, sizeof(*sconn));
648 sconn->server = server;
649 sconn->remote_host = strdup(server->config->routers->host);
650 sconn->remote_port = server->config->routers->port;
652 silc_task_register(server->timeout_queue, fd,
653 silc_server_connect_router,
654 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
655 SILC_TASK_PRI_NORMAL);
660 /* If we are a SILC router we need to establish all of our primary
662 if (server->server_type == SILC_ROUTER) {
663 SilcServerConfigSectionServerConnection *ptr;
665 SILC_LOG_DEBUG(("We are router"));
667 /* Create the connections to all our routes */
668 ptr = server->config->routers;
671 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
672 ptr->initiator ? "Initiator" : "Responder",
673 ptr->host, ptr->port));
675 if (ptr->initiator) {
676 /* Allocate connection object for hold connection specific stuff. */
677 sconn = silc_calloc(1, sizeof(*sconn));
678 sconn->server = server;
679 sconn->remote_host = strdup(ptr->host);
680 sconn->remote_port = ptr->port;
682 silc_task_register(server->timeout_queue, fd,
683 silc_server_connect_router,
684 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
685 SILC_TASK_PRI_NORMAL);
695 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
697 /* There wasn't a configured router, we will continue but we don't
698 have a connection to outside world. We will be standalone server. */
699 server->standalone = TRUE;
702 /* Second part of connecting to router(s). Key exchange protocol has been
703 executed and now we will execute authentication protocol. */
705 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
707 SilcProtocol protocol = (SilcProtocol)context;
708 SilcServerKEInternalContext *ctx =
709 (SilcServerKEInternalContext *)protocol->context;
710 SilcServer server = (SilcServer)ctx->server;
711 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
712 SilcSocketConnection sock = NULL;
713 SilcServerConnAuthInternalContext *proto_ctx;
714 SilcServerConfigSectionServerConnection *conn = NULL;
716 SILC_LOG_DEBUG(("Start"));
718 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
719 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
720 /* Error occured during protocol */
721 silc_protocol_free(protocol);
722 silc_ske_free_key_material(ctx->keymat);
724 silc_packet_context_free(ctx->packet);
726 silc_ske_free(ctx->ske);
728 silc_free(ctx->dest_id);
730 silc_task_unregister_by_callback(server->timeout_queue,
731 silc_server_failure_callback);
732 silc_server_disconnect_remote(server, sock, "Server closed connection: "
733 "Key exchange failed");
737 /* We now have the key material as the result of the key exchange
738 protocol. Take the key material into use. Free the raw key material
739 as soon as we've set them into use. */
740 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
741 ctx->ske->prop->cipher,
742 ctx->ske->prop->pkcs,
743 ctx->ske->prop->hash,
744 ctx->ske->prop->hmac,
746 silc_protocol_free(protocol);
747 silc_ske_free_key_material(ctx->keymat);
749 silc_packet_context_free(ctx->packet);
751 silc_ske_free(ctx->ske);
753 silc_free(ctx->dest_id);
755 silc_task_unregister_by_callback(server->timeout_queue,
756 silc_server_failure_callback);
757 silc_server_disconnect_remote(server, sock, "Server closed connection: "
758 "Key exchange failed");
761 silc_ske_free_key_material(ctx->keymat);
763 /* Allocate internal context for the authentication protocol. This
764 is sent as context for the protocol. */
765 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
766 proto_ctx->server = (void *)server;
767 proto_ctx->context = (void *)sconn;
768 proto_ctx->sock = sock = server->sockets[fd];
769 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
770 proto_ctx->dest_id_type = ctx->dest_id_type;
771 proto_ctx->dest_id = ctx->dest_id;
773 /* Resolve the authentication method used in this connection. Check if
774 we find a match from user configured connections */
775 conn = silc_server_config_find_router_conn(server->config,
779 /* Match found. Use the configured authentication method */
780 proto_ctx->auth_meth = conn->auth_meth;
781 if (conn->auth_data) {
782 proto_ctx->auth_data = strdup(conn->auth_data);
783 proto_ctx->auth_data_len = strlen(conn->auth_data);
786 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
787 sock->hostname, sock->ip, sock->port));
788 silc_protocol_free(protocol);
790 silc_packet_context_free(ctx->packet);
792 silc_ske_free(ctx->ske);
794 silc_free(ctx->dest_id);
796 silc_task_unregister_by_callback(server->timeout_queue,
797 silc_server_failure_callback);
798 silc_server_disconnect_remote(server, sock, "Server closed connection: "
799 "Key exchange failed");
803 /* Free old protocol as it is finished now */
804 silc_protocol_free(protocol);
806 silc_packet_context_free(ctx->packet);
808 sock->protocol = NULL;
810 /* Allocate the authentication protocol. This is allocated here
811 but we won't start it yet. We will be receiving party of this
812 protocol thus we will wait that connecting party will make
814 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
815 &sock->protocol, proto_ctx,
816 silc_server_connect_to_router_final);
818 /* Register timeout task. If the protocol is not executed inside
819 this timelimit the connection will be terminated. Currently
820 this is 15 seconds and is hard coded limit (XXX). */
821 proto_ctx->timeout_task =
822 silc_task_register(server->timeout_queue, sock->sock,
823 silc_server_timeout_remote,
824 (void *)server, 15, 0,
828 /* Run the protocol */
829 sock->protocol->execute(server->timeout_queue, 0,
830 sock->protocol, sock->sock, 0, 0);
833 /* Finalizes the connection to router. Registers a server task to the
834 queue so that we can accept new connections. */
836 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
838 SilcProtocol protocol = (SilcProtocol)context;
839 SilcServerConnAuthInternalContext *ctx =
840 (SilcServerConnAuthInternalContext *)protocol->context;
841 SilcServer server = (SilcServer)ctx->server;
842 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
843 SilcSocketConnection sock = ctx->sock;
844 SilcServerEntry id_entry;
846 SilcServerHBContext hb_context;
847 unsigned char *id_string;
849 SILC_LOG_DEBUG(("Start"));
851 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
852 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
853 /* Error occured during protocol */
855 silc_free(ctx->dest_id);
856 silc_server_disconnect_remote(server, sock, "Server closed connection: "
857 "Authentication failed");
861 /* Add a task to the queue. This task receives new connections to the
862 server. This task remains on the queue until the end of the program. */
863 if (!server->listenning) {
864 silc_task_register(server->io_queue, server->sock,
865 silc_server_accept_new_connection,
866 (void *)server, 0, 0,
868 SILC_TASK_PRI_NORMAL);
869 server->listenning = TRUE;
872 /* Send NEW_SERVER packet to the router. We will become registered
873 to the SILC network after sending this packet. */
874 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
875 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
876 strlen(server->server_name));
877 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
878 silc_buffer_format(packet,
879 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
880 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
881 SILC_STR_UI_SHORT(strlen(server->server_name)),
882 SILC_STR_UI_XNSTRING(server->server_name,
883 strlen(server->server_name)),
886 /* Send the packet */
887 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
888 packet->data, packet->len, TRUE);
889 silc_buffer_free(packet);
890 silc_free(id_string);
892 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
894 /* Add the connected router to local server list */
895 server->standalone = FALSE;
896 id_entry = silc_idlist_add_server(server->local_list, sock->hostname,
897 SILC_ROUTER, ctx->dest_id, NULL, sock);
900 silc_free(ctx->dest_id);
901 silc_server_disconnect_remote(server, sock, "Server closed connection: "
902 "Authentication failed");
906 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
907 silc_free(sock->user_data);
908 sock->user_data = (void *)id_entry;
909 sock->type = SILC_SOCKET_TYPE_ROUTER;
910 server->id_entry->router = id_entry;
911 server->router = id_entry;
912 server->router->data.registered = TRUE;
914 /* Perform keepalive. The `hb_context' will be freed automatically
915 when finally calling the silc_socket_free function. XXX hardcoded
917 hb_context = silc_calloc(1, sizeof(*hb_context));
918 hb_context->server = server;
919 silc_socket_set_heartbeat(sock, 600, hb_context,
920 silc_server_perform_heartbeat,
921 server->timeout_queue);
923 /* If we are router then announce our possible servers. */
924 if (server->server_type == SILC_ROUTER)
925 silc_server_announce_servers(server);
927 /* Announce our clients and channels to the router */
928 silc_server_announce_clients(server);
929 silc_server_announce_channels(server);
932 /* Free the temporary connection data context */
934 silc_free(sconn->remote_host);
938 /* Free the protocol object */
939 silc_protocol_free(protocol);
941 silc_packet_context_free(ctx->packet);
943 silc_ske_free(ctx->ske);
945 sock->protocol = NULL;
948 /* Accepts new connections to the server. Accepting new connections are
949 done in three parts to make it async. */
951 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
953 SilcServer server = (SilcServer)context;
954 SilcSocketConnection newsocket;
955 SilcServerKEInternalContext *proto_ctx;
958 SILC_LOG_DEBUG(("Accepting new connection"));
960 server->stat.conn_attempts++;
962 sock = silc_net_accept_connection(server->sock);
964 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
965 server->stat.conn_failures++;
969 /* Check max connections */
970 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
971 SILC_LOG_ERROR(("Refusing connection, server is full"));
972 server->stat.conn_failures++;
976 /* Set socket options */
977 silc_net_set_socket_nonblock(sock);
978 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
980 /* We don't create a ID yet, since we don't know what type of connection
981 this is yet. But, we do add the connection to the socket table. */
982 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
983 server->sockets[sock] = newsocket;
985 /* XXX This MUST be done async as this will block the entire server
986 process. Either we have to do our own resolver stuff or in the future
987 we can use threads. */
988 /* Perform name and address lookups for the remote host. */
989 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
990 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
992 SILC_LOG_ERROR(("IP/DNS lookup failed"));
993 server->stat.conn_failures++;
996 if (!newsocket->hostname)
997 newsocket->hostname = strdup(newsocket->ip);
998 newsocket->port = silc_net_get_remote_port(sock);
1000 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
1003 /* Allocate internal context for key exchange protocol. This is
1004 sent as context for the protocol. */
1005 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1006 proto_ctx->server = context;
1007 proto_ctx->sock = newsocket;
1008 proto_ctx->rng = server->rng;
1009 proto_ctx->responder = TRUE;
1011 /* Prepare the connection for key exchange protocol. We allocate the
1012 protocol but will not start it yet. The connector will be the
1013 initiator of the protocol thus we will wait for initiation from
1014 there before we start the protocol. */
1015 server->stat.auth_attempts++;
1016 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1017 &newsocket->protocol, proto_ctx,
1018 silc_server_accept_new_connection_second);
1020 /* Register a timeout task that will be executed if the connector
1021 will not start the key exchange protocol within 60 seconds. For
1022 now, this is a hard coded limit. After 60 secs the connection will
1023 be closed if the key exchange protocol has not been started. */
1024 proto_ctx->timeout_task =
1025 silc_task_register(server->timeout_queue, newsocket->sock,
1026 silc_server_timeout_remote,
1031 /* Register the connection for network input and output. This sets
1032 that scheduler will listen for incoming packets for this connection
1033 and sets that outgoing packets may be sent to this connection as well.
1034 However, this doesn't set the scheduler for outgoing traffic, it
1035 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1036 later when outgoing data is available. */
1037 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1040 /* Second part of accepting new connection. Key exchange protocol has been
1041 performed and now it is time to do little connection authentication
1042 protocol to figure out whether this connection is client or server
1043 and whether it has right to access this server (especially server
1044 connections needs to be authenticated). */
1046 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1048 SilcProtocol protocol = (SilcProtocol)context;
1049 SilcServerKEInternalContext *ctx =
1050 (SilcServerKEInternalContext *)protocol->context;
1051 SilcServer server = (SilcServer)ctx->server;
1052 SilcSocketConnection sock = NULL;
1053 SilcServerConnAuthInternalContext *proto_ctx;
1055 SILC_LOG_DEBUG(("Start"));
1057 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1058 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1059 /* Error occured during protocol */
1060 silc_protocol_free(protocol);
1061 silc_ske_free_key_material(ctx->keymat);
1063 silc_packet_context_free(ctx->packet);
1065 silc_ske_free(ctx->ske);
1067 silc_free(ctx->dest_id);
1069 silc_task_unregister_by_callback(server->timeout_queue,
1070 silc_server_failure_callback);
1071 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1072 "Key exchange failed");
1073 server->stat.auth_failures++;
1077 /* We now have the key material as the result of the key exchange
1078 protocol. Take the key material into use. Free the raw key material
1079 as soon as we've set them into use. */
1080 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1081 ctx->ske->prop->cipher,
1082 ctx->ske->prop->pkcs,
1083 ctx->ske->prop->hash,
1084 ctx->ske->prop->hmac,
1086 silc_protocol_free(protocol);
1087 silc_ske_free_key_material(ctx->keymat);
1089 silc_packet_context_free(ctx->packet);
1091 silc_ske_free(ctx->ske);
1093 silc_free(ctx->dest_id);
1095 silc_task_unregister_by_callback(server->timeout_queue,
1096 silc_server_failure_callback);
1097 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1098 "Key exchange failed");
1099 server->stat.auth_failures++;
1102 silc_ske_free_key_material(ctx->keymat);
1104 /* Allocate internal context for the authentication protocol. This
1105 is sent as context for the protocol. */
1106 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1107 proto_ctx->server = (void *)server;
1108 proto_ctx->sock = sock = server->sockets[fd];
1109 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1110 proto_ctx->responder = TRUE;
1111 proto_ctx->dest_id_type = ctx->dest_id_type;
1112 proto_ctx->dest_id = ctx->dest_id;
1114 /* Free old protocol as it is finished now */
1115 silc_protocol_free(protocol);
1117 silc_packet_context_free(ctx->packet);
1119 sock->protocol = NULL;
1121 /* Allocate the authentication protocol. This is allocated here
1122 but we won't start it yet. We will be receiving party of this
1123 protocol thus we will wait that connecting party will make
1124 their first move. */
1125 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1126 &sock->protocol, proto_ctx,
1127 silc_server_accept_new_connection_final);
1129 /* Register timeout task. If the protocol is not executed inside
1130 this timelimit the connection will be terminated. Currently
1131 this is 60 seconds and is hard coded limit (XXX). */
1132 proto_ctx->timeout_task =
1133 silc_task_register(server->timeout_queue, sock->sock,
1134 silc_server_timeout_remote,
1135 (void *)server, 60, 0,
1140 /* Final part of accepting new connection. The connection has now
1141 been authenticated and keys has been exchanged. We also know whether
1142 this is client or server connection. */
1144 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1146 SilcProtocol protocol = (SilcProtocol)context;
1147 SilcServerConnAuthInternalContext *ctx =
1148 (SilcServerConnAuthInternalContext *)protocol->context;
1149 SilcServer server = (SilcServer)ctx->server;
1150 SilcSocketConnection sock = ctx->sock;
1151 SilcServerHBContext hb_context;
1152 void *id_entry = NULL;
1154 SILC_LOG_DEBUG(("Start"));
1156 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1157 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1158 /* Error occured during protocol */
1159 silc_protocol_free(protocol);
1161 silc_packet_context_free(ctx->packet);
1163 silc_ske_free(ctx->ske);
1165 silc_free(ctx->dest_id);
1168 sock->protocol = NULL;
1169 silc_task_unregister_by_callback(server->timeout_queue,
1170 silc_server_failure_callback);
1171 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1172 "Authentication failed");
1173 server->stat.auth_failures++;
1177 sock->type = ctx->conn_type;
1178 switch(sock->type) {
1179 case SILC_SOCKET_TYPE_CLIENT:
1181 SilcClientEntry client;
1183 SILC_LOG_DEBUG(("Remote host is client"));
1184 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1187 /* Add the client to the client ID cache. The nickname and Client ID
1188 and other information is created after we have received NEW_CLIENT
1189 packet from client. */
1190 client = silc_idlist_add_client(server->local_list,
1191 NULL, 0, NULL, NULL, NULL, NULL, sock);
1193 SILC_LOG_ERROR(("Could not add new client to cache"));
1194 silc_free(sock->user_data);
1199 server->stat.my_clients++;
1200 server->stat.clients++;
1201 if (server->server_type == SILC_ROUTER)
1202 server->stat.cell_clients++;
1204 id_entry = (void *)client;
1207 case SILC_SOCKET_TYPE_SERVER:
1208 case SILC_SOCKET_TYPE_ROUTER:
1210 SilcServerEntry new_server;
1212 SILC_LOG_DEBUG(("Remote host is %s",
1213 sock->type == SILC_SOCKET_TYPE_SERVER ?
1214 "server" : "router"));
1215 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1216 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1217 "server" : "router"));
1219 /* Add the server into server cache. The server name and Server ID
1220 is updated after we have received NEW_SERVER packet from the
1221 server. We mark ourselves as router for this server if we really
1224 silc_idlist_add_server(server->local_list, NULL,
1225 sock->type == SILC_SOCKET_TYPE_SERVER ?
1226 SILC_SERVER : SILC_ROUTER, NULL,
1227 sock->type == SILC_SOCKET_TYPE_SERVER ?
1228 server->id_entry : NULL, sock);
1230 SILC_LOG_ERROR(("Could not add new server to cache"));
1231 silc_free(sock->user_data);
1236 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1237 server->stat.my_servers++;
1239 server->stat.my_routers++;
1240 server->stat.servers++;
1242 id_entry = (void *)new_server;
1244 /* There is connection to other server now, if it is router then
1245 we will have connection to outside world. If we are router but
1246 normal server connected to us then we will remain standalone,
1247 if we are standlone. */
1248 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1249 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1250 server->standalone = FALSE;
1251 if (!server->id_entry->router) {
1252 server->id_entry->router = id_entry;
1253 server->router = id_entry;
1262 /* Add the common data structure to the ID entry. */
1264 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1266 /* Add to sockets internal pointer for fast referencing */
1267 silc_free(sock->user_data);
1268 sock->user_data = id_entry;
1270 /* Connection has been fully established now. Everything is ok. */
1271 SILC_LOG_DEBUG(("New connection authenticated"));
1273 /* Perform keepalive. The `hb_context' will be freed automatically
1274 when finally calling the silc_socket_free function. XXX hardcoded
1276 hb_context = silc_calloc(1, sizeof(*hb_context));
1277 hb_context->server = server;
1278 silc_socket_set_heartbeat(sock, 600, hb_context,
1279 silc_server_perform_heartbeat,
1280 server->timeout_queue);
1282 silc_task_unregister_by_callback(server->timeout_queue,
1283 silc_server_failure_callback);
1284 silc_protocol_free(protocol);
1286 silc_packet_context_free(ctx->packet);
1288 silc_ske_free(ctx->ske);
1290 silc_free(ctx->dest_id);
1292 sock->protocol = NULL;
1295 /* This function is used to read packets from network and send packets to
1296 network. This is usually a generic task. */
1298 SILC_TASK_CALLBACK(silc_server_packet_process)
1300 SilcServer server = (SilcServer)context;
1301 SilcSocketConnection sock = server->sockets[fd];
1302 SilcIDListData idata;
1303 SilcCipher cipher = NULL;
1304 SilcHmac hmac = NULL;
1310 SILC_LOG_DEBUG(("Processing packet"));
1312 /* Packet sending */
1314 if (type == SILC_TASK_WRITE) {
1315 /* Do not send data to disconnected connection */
1316 if (SILC_IS_DISCONNECTED(sock))
1319 server->stat.packets_sent++;
1321 if (sock->outbuf->data - sock->outbuf->head)
1322 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1324 ret = silc_server_packet_send_real(server, sock, TRUE);
1326 /* If returned -2 could not write to connection now, will do
1334 /* The packet has been sent and now it is time to set the connection
1335 back to only for input. When there is again some outgoing data
1336 available for this connection it will be set for output as well.
1337 This call clears the output setting and sets it only for input. */
1338 SILC_SET_CONNECTION_FOR_INPUT(fd);
1339 SILC_UNSET_OUTBUF_PENDING(sock);
1341 silc_buffer_clear(sock->outbuf);
1345 /* Packet receiving */
1347 /* Read some data from connection */
1348 ret = silc_packet_receive(sock);
1354 SILC_LOG_DEBUG(("Read EOF"));
1356 /* If connection is disconnecting already we will finally
1357 close the connection */
1358 if (SILC_IS_DISCONNECTING(sock)) {
1359 if (sock->user_data)
1360 silc_server_free_sock_user_data(server, sock);
1361 silc_server_close_connection(server, sock);
1365 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1366 SILC_SET_DISCONNECTING(sock);
1368 /* If the closed connection was our primary router connection the
1369 start re-connecting phase. */
1370 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1371 sock == server->router->connection)
1372 silc_task_register(server->timeout_queue, 0,
1373 silc_server_connect_to_router,
1376 SILC_TASK_PRI_NORMAL);
1378 if (sock->user_data)
1379 silc_server_free_sock_user_data(server, sock);
1380 silc_server_close_connection(server, sock);
1384 /* If connection is disconnecting or disconnected we will ignore
1386 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1387 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1391 server->stat.packets_received++;
1393 /* Get keys and stuff from ID entry */
1394 idata = (SilcIDListData)sock->user_data;
1396 idata->last_receive = time(NULL);
1397 cipher = idata->receive_key;
1401 /* Process the packet. This will call the parser that will then
1402 decrypt and parse the packet. */
1403 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1407 /* Callback function that the silc_packet_decrypt will call to make the
1408 decision whether the packet is normal or special packet. We will
1409 return TRUE if it is normal and FALSE if it is special */
1411 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1413 SilcPacketContext *packet,
1416 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1417 SilcServer server = (SilcServer)parse_ctx->context;
1419 /* Packet is normal packet, if:
1421 1) packet is private message packet and does not have private key set
1422 2) is other packet than channel message packet
1423 3) is channel message packet and remote is router and we are router
1425 all other packets are special packets
1428 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1429 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1432 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1433 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1434 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1435 server->server_type == SILC_ROUTER))
1441 /* Parses whole packet, received earlier. */
1443 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1445 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1446 SilcServer server = (SilcServer)parse_ctx->context;
1447 SilcSocketConnection sock = parse_ctx->sock;
1448 SilcPacketContext *packet = parse_ctx->packet;
1451 SILC_LOG_DEBUG(("Start"));
1453 /* Decrypt the received packet */
1454 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1455 packet->buffer, packet,
1456 silc_server_packet_decrypt_check, parse_ctx);
1461 /* Parse the packet. Packet type is returned. */
1462 ret = silc_packet_parse(packet);
1464 /* Parse the packet header in special way as this is "special"
1466 ret = silc_packet_parse_special(packet);
1469 if (ret == SILC_PACKET_NONE)
1472 /* Check that the the current client ID is same as in the client's packet. */
1473 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1474 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1475 if (client && client->id) {
1476 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1477 packet->src_id_type);
1478 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1486 if (server->server_type == SILC_ROUTER) {
1487 /* Route the packet if it is not destined to us. Other ID types but
1488 server are handled separately after processing them. */
1489 if (packet->dst_id_type == SILC_ID_SERVER &&
1490 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1491 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1493 /* Route the packet to fastest route for the destination ID */
1494 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1495 packet->dst_id_type);
1498 silc_server_packet_route(server,
1499 silc_server_route_get(server, id,
1500 packet->dst_id_type),
1506 /* Broadcast packet if it is marked as broadcast packet and it is
1507 originated from router and we are router. */
1508 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1509 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1510 silc_server_packet_broadcast(server, server->router->connection, packet);
1514 /* Parse the incoming packet type */
1515 silc_server_packet_parse_type(server, sock, packet);
1518 /* silc_buffer_clear(sock->inbuf); */
1519 silc_packet_context_free(packet);
1520 silc_free(parse_ctx);
1523 /* Parser callback called by silc_packet_receive_process. This merely
1524 registers timeout that will handle the actual parsing when appropriate. */
1526 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1528 SilcServer server = (SilcServer)parser_context->context;
1529 SilcSocketConnection sock = parser_context->sock;
1531 switch (sock->type) {
1532 case SILC_SOCKET_TYPE_CLIENT:
1533 case SILC_SOCKET_TYPE_UNKNOWN:
1534 /* Parse the packet with timeout */
1535 silc_task_register(server->timeout_queue, sock->sock,
1536 silc_server_packet_parse_real,
1537 (void *)parser_context, 0, 100000,
1539 SILC_TASK_PRI_NORMAL);
1541 case SILC_SOCKET_TYPE_SERVER:
1542 case SILC_SOCKET_TYPE_ROUTER:
1543 /* Packets from servers are parsed as soon as possible */
1544 silc_task_register(server->timeout_queue, sock->sock,
1545 silc_server_packet_parse_real,
1546 (void *)parser_context, 0, 1,
1548 SILC_TASK_PRI_NORMAL);
1555 /* Parses the packet type and calls what ever routines the packet type
1556 requires. This is done for all incoming packets. */
1558 void silc_server_packet_parse_type(SilcServer server,
1559 SilcSocketConnection sock,
1560 SilcPacketContext *packet)
1562 SilcPacketType type = packet->type;
1564 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1566 /* Parse the packet type */
1568 case SILC_PACKET_DISCONNECT:
1569 SILC_LOG_DEBUG(("Disconnect packet"));
1570 if (packet->flags & SILC_PACKET_FLAG_LIST)
1574 case SILC_PACKET_SUCCESS:
1576 * Success received for something. For now we can have only
1577 * one protocol for connection executing at once hence this
1578 * success message is for whatever protocol is executing currently.
1580 SILC_LOG_DEBUG(("Success packet"));
1581 if (packet->flags & SILC_PACKET_FLAG_LIST)
1583 if (sock->protocol) {
1584 sock->protocol->execute(server->timeout_queue, 0,
1585 sock->protocol, sock->sock, 0, 0);
1589 case SILC_PACKET_FAILURE:
1591 * Failure received for something. For now we can have only
1592 * one protocol for connection executing at once hence this
1593 * failure message is for whatever protocol is executing currently.
1595 SILC_LOG_DEBUG(("Failure packet"));
1596 if (packet->flags & SILC_PACKET_FLAG_LIST)
1598 if (sock->protocol) {
1599 SilcServerFailureContext f;
1600 f = silc_calloc(1, sizeof(*f));
1604 /* We will wait 5 seconds to process this failure packet */
1605 silc_task_register(server->timeout_queue, sock->sock,
1606 silc_server_failure_callback, (void *)f, 5, 0,
1607 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1611 case SILC_PACKET_REJECT:
1612 SILC_LOG_DEBUG(("Reject packet"));
1613 if (packet->flags & SILC_PACKET_FLAG_LIST)
1618 case SILC_PACKET_NOTIFY:
1620 * Received notify packet. Server can receive notify packets from
1621 * router. Server then relays the notify messages to clients if needed.
1623 SILC_LOG_DEBUG(("Notify packet"));
1624 if (packet->flags & SILC_PACKET_FLAG_LIST)
1625 silc_server_notify_list(server, sock, packet);
1627 silc_server_notify(server, sock, packet);
1633 case SILC_PACKET_CHANNEL_MESSAGE:
1635 * Received channel message. Channel messages are special packets
1636 * (although probably most common ones) thus they are handled
1639 SILC_LOG_DEBUG(("Channel Message packet"));
1640 if (packet->flags & SILC_PACKET_FLAG_LIST)
1642 silc_server_channel_message(server, sock, packet);
1645 case SILC_PACKET_CHANNEL_KEY:
1647 * Received key for channel. As channels are created by the router
1648 * the keys are as well. We will distribute the key to all of our
1649 * locally connected clients on the particular channel. Router
1650 * never receives this channel and thus is ignored.
1652 SILC_LOG_DEBUG(("Channel Key packet"));
1653 if (packet->flags & SILC_PACKET_FLAG_LIST)
1655 silc_server_channel_key(server, sock, packet);
1661 case SILC_PACKET_COMMAND:
1663 * Recived command. Processes the command request and allocates the
1664 * command context and calls the command.
1666 SILC_LOG_DEBUG(("Command packet"));
1667 if (packet->flags & SILC_PACKET_FLAG_LIST)
1669 silc_server_command_process(server, sock, packet);
1672 case SILC_PACKET_COMMAND_REPLY:
1674 * Received command reply packet. Received command reply to command. It
1675 * may be reply to command sent by us or reply to command sent by client
1676 * that we've routed further.
1678 SILC_LOG_DEBUG(("Command Reply packet"));
1679 if (packet->flags & SILC_PACKET_FLAG_LIST)
1681 silc_server_command_reply(server, sock, packet);
1685 * Private Message packets
1687 case SILC_PACKET_PRIVATE_MESSAGE:
1689 * Received private message packet. The packet is coming from either
1692 SILC_LOG_DEBUG(("Private Message packet"));
1693 if (packet->flags & SILC_PACKET_FLAG_LIST)
1695 silc_server_private_message(server, sock, packet);
1698 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1700 * Private message key packet.
1702 if (packet->flags & SILC_PACKET_FLAG_LIST)
1704 silc_server_private_message_key(server, sock, packet);
1708 * Key Exchange protocol packets
1710 case SILC_PACKET_KEY_EXCHANGE:
1711 SILC_LOG_DEBUG(("KE packet"));
1712 if (packet->flags & SILC_PACKET_FLAG_LIST)
1715 if (sock->protocol && sock->protocol->protocol &&
1716 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1718 SilcServerKEInternalContext *proto_ctx =
1719 (SilcServerKEInternalContext *)sock->protocol->context;
1721 proto_ctx->packet = silc_packet_context_dup(packet);
1723 /* Let the protocol handle the packet */
1724 sock->protocol->execute(server->timeout_queue, 0,
1725 sock->protocol, sock->sock, 0, 100000);
1727 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1728 "protocol active, packet dropped."));
1730 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1734 case SILC_PACKET_KEY_EXCHANGE_1:
1735 SILC_LOG_DEBUG(("KE 1 packet"));
1736 if (packet->flags & SILC_PACKET_FLAG_LIST)
1739 if (sock->protocol && sock->protocol->protocol &&
1740 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1742 SilcServerKEInternalContext *proto_ctx =
1743 (SilcServerKEInternalContext *)sock->protocol->context;
1745 if (proto_ctx->packet)
1746 silc_packet_context_free(proto_ctx->packet);
1748 proto_ctx->packet = silc_packet_context_dup(packet);
1749 proto_ctx->dest_id_type = packet->src_id_type;
1750 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1751 packet->src_id_type);
1752 if (!proto_ctx->dest_id)
1755 /* Let the protocol handle the packet */
1756 sock->protocol->execute(server->timeout_queue, 0,
1757 sock->protocol, sock->sock,
1760 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1761 "protocol active, packet dropped."));
1765 case SILC_PACKET_KEY_EXCHANGE_2:
1766 SILC_LOG_DEBUG(("KE 2 packet"));
1767 if (packet->flags & SILC_PACKET_FLAG_LIST)
1770 if (sock->protocol && sock->protocol->protocol &&
1771 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1773 SilcServerKEInternalContext *proto_ctx =
1774 (SilcServerKEInternalContext *)sock->protocol->context;
1776 if (proto_ctx->packet)
1777 silc_packet_context_free(proto_ctx->packet);
1779 proto_ctx->packet = silc_packet_context_dup(packet);
1780 proto_ctx->dest_id_type = packet->src_id_type;
1781 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1782 packet->src_id_type);
1783 if (!proto_ctx->dest_id)
1786 /* Let the protocol handle the packet */
1787 sock->protocol->execute(server->timeout_queue, 0,
1788 sock->protocol, sock->sock,
1791 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1792 "protocol active, packet dropped."));
1796 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1798 * Connection authentication request packet. When we receive this packet
1799 * we will send to the other end information about our mandatory
1800 * authentication method for the connection. This packet maybe received
1803 SILC_LOG_DEBUG(("Connection authentication request packet"));
1804 if (packet->flags & SILC_PACKET_FLAG_LIST)
1806 silc_server_connection_auth_request(server, sock, packet);
1810 * Connection Authentication protocol packets
1812 case SILC_PACKET_CONNECTION_AUTH:
1813 /* Start of the authentication protocol. We receive here the
1814 authentication data and will verify it. */
1815 SILC_LOG_DEBUG(("Connection auth packet"));
1816 if (packet->flags & SILC_PACKET_FLAG_LIST)
1819 if (sock->protocol && sock->protocol->protocol->type
1820 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1822 SilcServerConnAuthInternalContext *proto_ctx =
1823 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1825 proto_ctx->packet = silc_packet_context_dup(packet);
1827 /* Let the protocol handle the packet */
1828 sock->protocol->execute(server->timeout_queue, 0,
1829 sock->protocol, sock->sock, 0, 0);
1831 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1832 "protocol active, packet dropped."));
1836 case SILC_PACKET_NEW_ID:
1838 * Received New ID packet. This includes some new ID that has been
1839 * created. It may be for client, server or channel. This is the way
1840 * to distribute information about new registered entities in the
1843 SILC_LOG_DEBUG(("New ID packet"));
1844 if (packet->flags & SILC_PACKET_FLAG_LIST)
1845 silc_server_new_id_list(server, sock, packet);
1847 silc_server_new_id(server, sock, packet);
1850 case SILC_PACKET_NEW_CLIENT:
1852 * Received new client packet. This includes client information that
1853 * we will use to create initial client ID. After creating new
1854 * ID we will send it to the client.
1856 SILC_LOG_DEBUG(("New Client packet"));
1857 if (packet->flags & SILC_PACKET_FLAG_LIST)
1859 silc_server_new_client(server, sock, packet);
1862 case SILC_PACKET_NEW_SERVER:
1864 * Received new server packet. This includes Server ID and some other
1865 * information that we may save. This is received after server has
1868 SILC_LOG_DEBUG(("New Server packet"));
1869 if (packet->flags & SILC_PACKET_FLAG_LIST)
1871 silc_server_new_server(server, sock, packet);
1874 case SILC_PACKET_NEW_CHANNEL:
1876 * Received new channel packet. Information about new channel in the
1877 * network are distributed using this packet.
1879 SILC_LOG_DEBUG(("New Channel packet"));
1880 if (packet->flags & SILC_PACKET_FLAG_LIST)
1881 silc_server_new_channel_list(server, sock, packet);
1883 silc_server_new_channel(server, sock, packet);
1886 case SILC_PACKET_HEARTBEAT:
1888 * Received heartbeat.
1890 SILC_LOG_DEBUG(("Heartbeat packet"));
1891 if (packet->flags & SILC_PACKET_FLAG_LIST)
1895 case SILC_PACKET_KEY_AGREEMENT:
1897 * Received heartbeat.
1899 SILC_LOG_DEBUG(("Key agreement packet"));
1900 if (packet->flags & SILC_PACKET_FLAG_LIST)
1902 silc_server_key_agreement(server, sock, packet);
1906 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1912 /* Creates connection to a remote router. */
1914 void silc_server_create_connection(SilcServer server,
1915 char *remote_host, unsigned int port)
1917 SilcServerConnection sconn;
1919 /* Allocate connection object for hold connection specific stuff. */
1920 sconn = silc_calloc(1, sizeof(*sconn));
1921 sconn->server = server;
1922 sconn->remote_host = strdup(remote_host);
1923 sconn->remote_port = port;
1925 silc_task_register(server->timeout_queue, 0,
1926 silc_server_connect_router,
1927 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1928 SILC_TASK_PRI_NORMAL);
1931 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1933 silc_socket_free((SilcSocketConnection)context);
1936 /* Closes connection to socket connection */
1938 void silc_server_close_connection(SilcServer server,
1939 SilcSocketConnection sock)
1941 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
1943 /* We won't listen for this connection anymore */
1944 silc_schedule_unset_listen_fd(sock->sock);
1946 /* Unregister all tasks */
1947 silc_task_unregister_by_fd(server->io_queue, sock->sock);
1948 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
1950 /* Close the actual connection */
1951 silc_net_close_connection(sock->sock);
1952 server->sockets[sock->sock] = NULL;
1954 silc_task_register(server->timeout_queue, 0,
1955 silc_server_close_connection_final,
1956 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
1957 SILC_TASK_PRI_NORMAL);
1960 /* Sends disconnect message to remote connection and disconnects the
1963 void silc_server_disconnect_remote(SilcServer server,
1964 SilcSocketConnection sock,
1965 const char *fmt, ...)
1968 unsigned char buf[4096];
1973 memset(buf, 0, sizeof(buf));
1975 vsprintf(buf, fmt, ap);
1978 SILC_LOG_DEBUG(("Disconnecting remote host"));
1980 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
1982 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1983 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1984 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1987 /* Notify remote end that the conversation is over. The notify message
1988 is tried to be sent immediately. */
1989 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
1990 buf, strlen(buf), TRUE);
1992 /* Mark the connection to be disconnected */
1993 SILC_SET_DISCONNECTED(sock);
1994 silc_server_close_connection(server, sock);
1999 SilcClientEntry client;
2000 } *FreeClientInternal;
2002 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2004 FreeClientInternal i = (FreeClientInternal)context;
2006 silc_idlist_del_data(i->client);
2007 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2011 /* Frees client data and notifies about client's signoff. */
2013 void silc_server_free_client_data(SilcServer server,
2014 SilcSocketConnection sock,
2015 SilcClientEntry client,
2019 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2021 /* If there is pending outgoing data for the client then purge it
2022 to the network before removing the client entry. */
2023 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2024 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2025 server->stat.packets_sent++;
2027 if (sock->outbuf->data - sock->outbuf->head)
2028 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2030 silc_server_packet_send_real(server, sock, TRUE);
2032 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2033 SILC_UNSET_OUTBUF_PENDING(sock);
2034 silc_buffer_clear(sock->outbuf);
2037 /* Send SIGNOFF notify to routers. */
2038 if (notify && !server->standalone && server->router)
2039 silc_server_send_notify_signoff(server, server->router->connection,
2040 server->server_type == SILC_SERVER ?
2041 FALSE : TRUE, client->id,
2042 SILC_ID_CLIENT_LEN, signoff);
2044 /* Remove client from all channels */
2046 silc_server_remove_from_channels(server, NULL, client,
2047 TRUE, signoff, TRUE);
2049 silc_server_remove_from_channels(server, NULL, client,
2050 FALSE, NULL, FALSE);
2052 /* We will not delete the client entry right away. We will take it
2053 into history (for WHOWAS command) for 5 minutes */
2056 silc_task_register(server->timeout_queue, 0,
2057 silc_server_free_client_data_timeout,
2059 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2060 client->data.registered = FALSE;
2062 /* Free the client entry and everything in it */
2063 server->stat.my_clients--;
2064 server->stat.clients--;
2065 if (server->server_type == SILC_ROUTER)
2066 server->stat.cell_clients--;
2069 /* Frees user_data pointer from socket connection object. This also sends
2070 appropriate notify packets to the network to inform about leaving
2073 void silc_server_free_sock_user_data(SilcServer server,
2074 SilcSocketConnection sock)
2076 SILC_LOG_DEBUG(("Start"));
2078 switch(sock->type) {
2079 case SILC_SOCKET_TYPE_CLIENT:
2081 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2082 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2085 case SILC_SOCKET_TYPE_SERVER:
2086 case SILC_SOCKET_TYPE_ROUTER:
2088 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2090 /* Free all client entries that this server owns as they will
2091 become invalid now as well. */
2092 silc_server_remove_clients_by_server(server, user_data, TRUE);
2094 /* If this was our primary router connection then we're lost to
2095 the outside world. */
2096 if (server->router == user_data) {
2097 server->id_entry->router = NULL;
2098 server->router = NULL;
2099 server->standalone = TRUE;
2102 /* Free the server entry */
2103 silc_idlist_del_data(user_data);
2104 silc_idlist_del_server(server->local_list, user_data);
2105 server->stat.my_servers--;
2106 server->stat.servers--;
2107 if (server->server_type == SILC_ROUTER)
2108 server->stat.cell_servers--;
2113 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2115 silc_idlist_del_data(user_data);
2116 silc_free(user_data);
2121 sock->user_data = NULL;
2124 /* This function is used to remove all client entries by the server `entry'.
2125 This is called when the connection is lost to the server. In this case
2126 we must invalidate all the client entries owned by the server `entry'.
2127 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2128 distributed to our local clients. */
2130 int silc_server_remove_clients_by_server(SilcServer server,
2131 SilcServerEntry entry,
2134 SilcIDCacheList list = NULL;
2135 SilcIDCacheEntry id_cache = NULL;
2136 SilcClientEntry client = NULL;
2138 SilcClientEntry *clients = NULL;
2139 unsigned int clients_c = 0;
2140 unsigned char **argv = NULL;
2141 unsigned int *argv_lens = NULL, *argv_types = NULL, argc = 0;
2144 SILC_LOG_DEBUG(("Start"));
2146 if (server_signoff) {
2147 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2148 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2149 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2150 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2151 argv[argc] = idp->data;
2152 argv_lens[argc] = idp->len;
2153 argv_types[argc] = argc + 1;
2155 silc_buffer_free(idp);
2158 if (silc_idcache_find_by_id(server->local_list->clients,
2159 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2161 if (silc_idcache_list_first(list, &id_cache)) {
2163 client = (SilcClientEntry)id_cache->context;
2165 if (client->router != entry) {
2166 if (server_signoff && client->connection) {
2167 clients = silc_realloc(clients,
2168 sizeof(*clients) * (clients_c + 1));
2169 clients[clients_c] = client;
2173 if (!silc_idcache_list_next(list, &id_cache))
2179 if (server_signoff) {
2180 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2181 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2182 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2184 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2186 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2187 memcpy(argv[argc], idp->data, idp->len);
2188 argv_lens[argc] = idp->len;
2189 argv_types[argc] = argc + 1;
2191 silc_buffer_free(idp);
2194 /* Remove the client entry */
2195 silc_server_remove_from_channels(server, NULL, client, FALSE,
2197 silc_idlist_del_client(server->local_list, client);
2199 if (!silc_idcache_list_next(list, &id_cache))
2203 silc_idcache_list_free(list);
2206 if (silc_idcache_find_by_id(server->global_list->clients,
2207 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2209 if (silc_idcache_list_first(list, &id_cache)) {
2211 client = (SilcClientEntry)id_cache->context;
2213 if (client->router != entry) {
2214 if (server_signoff && client->connection) {
2215 clients = silc_realloc(clients,
2216 sizeof(*clients) * (clients_c + 1));
2217 clients[clients_c] = client;
2221 if (!silc_idcache_list_next(list, &id_cache))
2227 if (server_signoff) {
2228 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2229 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2230 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2232 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2234 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2235 memcpy(argv[argc], idp->data, idp->len);
2236 argv_lens[argc] = idp->len;
2237 argv_types[argc] = argc + 1;
2239 silc_buffer_free(idp);
2242 /* Remove the client entry */
2243 silc_server_remove_from_channels(server, NULL, client, FALSE,
2245 silc_idlist_del_client(server->global_list, client);
2247 if (!silc_idcache_list_next(list, &id_cache))
2251 silc_idcache_list_free(list);
2254 /* Send the SERVER_SIGNOFF notify */
2255 if (server_signoff) {
2258 /* Send SERVER_SIGNOFF notify to our primary router */
2259 if (!server->standalone && server->router) {
2260 args = silc_argument_payload_encode(1, argv, argv_lens,
2262 silc_server_send_notify_args(server,
2263 server->router->connection,
2264 server->server_type ==
2265 SILC_SERVER ? FALSE : TRUE,
2266 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2268 silc_buffer_free(args);
2271 args = silc_argument_payload_encode(argc, argv, argv_lens,
2273 /* Send to local clients */
2274 for (i = 0; i < clients_c; i++) {
2275 silc_server_send_notify_args(server, clients[i]->connection,
2276 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2281 silc_buffer_free(args);
2283 silc_free(argv_lens);
2284 silc_free(argv_types);
2290 /* Checks whether given channel has global users. If it does this returns
2291 TRUE and FALSE if there is only locally connected clients on the channel. */
2293 int silc_server_channel_has_global(SilcChannelEntry channel)
2295 SilcChannelClientEntry chl;
2297 silc_list_start(channel->user_list);
2298 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2299 if (chl->client->router)
2306 /* Checks whether given channel has locally connected users. If it does this
2307 returns TRUE and FALSE if there is not one locally connected client. */
2309 int silc_server_channel_has_local(SilcChannelEntry channel)
2311 SilcChannelClientEntry chl;
2313 silc_list_start(channel->user_list);
2314 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2315 if (!chl->client->router)
2322 /* Removes client from all channels it has joined. This is used when client
2323 connection is disconnected. If the client on a channel is last, the
2324 channel is removed as well. This sends the SIGNOFF notify types. */
2326 void silc_server_remove_from_channels(SilcServer server,
2327 SilcSocketConnection sock,
2328 SilcClientEntry client,
2330 char *signoff_message,
2333 SilcChannelEntry channel;
2334 SilcChannelClientEntry chl;
2337 SILC_LOG_DEBUG(("Start"));
2339 if (!client || !client->id)
2342 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2344 /* Remove the client from all channels. The client is removed from
2345 the channels' user list. */
2346 silc_list_start(client->channels);
2347 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2348 channel = chl->channel;
2350 /* Remove channel from client's channel list */
2351 silc_list_del(client->channels, chl);
2353 /* Remove channel if there is no users anymore */
2354 if (server->server_type == SILC_ROUTER &&
2355 silc_list_count(channel->user_list) < 2) {
2356 server->stat.my_channels--;
2359 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2361 if (channel->founder_key) {
2362 /* The founder auth data exists, do not remove the channel entry */
2363 SilcChannelClientEntry chl2;
2367 silc_list_start(channel->user_list);
2368 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2369 silc_list_del(chl2->client->channels, chl2);
2370 silc_list_del(channel->user_list, chl2);
2376 if (!silc_idlist_del_channel(server->local_list, channel))
2377 silc_idlist_del_channel(server->global_list, channel);
2381 /* Remove client from channel's client list */
2382 silc_list_del(channel->user_list, chl);
2384 server->stat.my_chanclients--;
2386 /* If there is no global users on the channel anymore mark the channel
2387 as local channel. */
2388 if (server->server_type == SILC_SERVER &&
2389 !silc_server_channel_has_global(channel))
2390 channel->global_users = FALSE;
2392 /* If there is not at least one local user on the channel then we don't
2393 need the channel entry anymore, we can remove it safely. */
2394 if (server->server_type == SILC_SERVER &&
2395 !silc_server_channel_has_local(channel)) {
2396 /* Notify about leaving client if this channel has global users. */
2397 if (notify && channel->global_users)
2398 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2399 SILC_NOTIFY_TYPE_SIGNOFF,
2400 signoff_message ? 2 : 1,
2401 clidp->data, clidp->len,
2402 signoff_message, signoff_message ?
2403 strlen(signoff_message) : 0);
2405 server->stat.my_channels--;
2408 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2410 if (channel->founder_key) {
2411 /* The founder auth data exists, do not remove the channel entry */
2412 SilcChannelClientEntry chl2;
2416 silc_list_start(channel->user_list);
2417 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2418 silc_list_del(chl2->client->channels, chl2);
2419 silc_list_del(channel->user_list, chl2);
2425 if (!silc_idlist_del_channel(server->local_list, channel))
2426 silc_idlist_del_channel(server->global_list, channel);
2430 /* Send notify to channel about client leaving SILC and thus
2431 the entire channel. */
2433 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2434 SILC_NOTIFY_TYPE_SIGNOFF,
2435 signoff_message ? 2 : 1,
2436 clidp->data, clidp->len,
2437 signoff_message, signoff_message ?
2438 strlen(signoff_message) : 0);
2440 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2441 /* Re-generate channel key */
2442 silc_server_create_channel_key(server, channel, 0);
2444 /* Send the channel key to the channel. The key of course is not sent
2445 to the client who was removed from the channel. */
2446 silc_server_send_channel_key(server, client->connection, channel,
2447 server->server_type == SILC_ROUTER ?
2448 FALSE : !server->standalone);
2452 silc_buffer_free(clidp);
2455 /* Removes client from one channel. This is used for example when client
2456 calls LEAVE command to remove itself from the channel. Returns TRUE
2457 if channel still exists and FALSE if the channel is removed when
2458 last client leaves the channel. If `notify' is FALSE notify messages
2461 int silc_server_remove_from_one_channel(SilcServer server,
2462 SilcSocketConnection sock,
2463 SilcChannelEntry channel,
2464 SilcClientEntry client,
2467 SilcChannelEntry ch;
2468 SilcChannelClientEntry chl;
2471 SILC_LOG_DEBUG(("Start"));
2473 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2475 /* Remove the client from the channel. The client is removed from
2476 the channel's user list. */
2477 silc_list_start(client->channels);
2478 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2479 if (chl->channel != channel)
2484 /* Remove channel from client's channel list */
2485 silc_list_del(client->channels, chl);
2487 /* Remove channel if there is no users anymore */
2488 if (server->server_type == SILC_ROUTER &&
2489 silc_list_count(channel->user_list) < 2) {
2491 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2492 if (!silc_idlist_del_channel(server->local_list, channel))
2493 silc_idlist_del_channel(server->global_list, channel);
2494 silc_buffer_free(clidp);
2495 server->stat.my_channels--;
2499 /* Remove client from channel's client list */
2500 silc_list_del(channel->user_list, chl);
2502 server->stat.my_chanclients--;
2504 /* If there is no global users on the channel anymore mark the channel
2505 as local channel. */
2506 if (server->server_type == SILC_SERVER &&
2507 !silc_server_channel_has_global(channel))
2508 channel->global_users = FALSE;
2510 /* If there is not at least one local user on the channel then we don't
2511 need the channel entry anymore, we can remove it safely. */
2512 if (server->server_type == SILC_SERVER &&
2513 !silc_server_channel_has_local(channel)) {
2514 /* Notify about leaving client if this channel has global users. */
2515 if (notify && channel->global_users)
2516 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2517 SILC_NOTIFY_TYPE_LEAVE, 1,
2518 clidp->data, clidp->len);
2520 server->stat.my_channels--;
2521 silc_buffer_free(clidp);
2524 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2526 if (channel->founder_key) {
2527 /* The founder auth data exists, do not remove the channel entry */
2528 SilcChannelClientEntry chl2;
2532 silc_list_start(channel->user_list);
2533 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2534 silc_list_del(chl2->client->channels, chl2);
2535 silc_list_del(channel->user_list, chl2);
2541 if (!silc_idlist_del_channel(server->local_list, channel))
2542 silc_idlist_del_channel(server->global_list, channel);
2546 /* Send notify to channel about client leaving the channel */
2548 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2549 SILC_NOTIFY_TYPE_LEAVE, 1,
2550 clidp->data, clidp->len);
2554 silc_buffer_free(clidp);
2558 /* Returns TRUE if the given client is on the channel. FALSE if not.
2559 This works because we assure that the user list on the channel is
2560 always in up to date thus we can only check the channel list from
2561 `client' which is faster than checking the user list from `channel'. */
2563 int silc_server_client_on_channel(SilcClientEntry client,
2564 SilcChannelEntry channel)
2566 SilcChannelClientEntry chl;
2568 if (!client || !channel)
2571 silc_list_start(client->channels);
2572 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2573 if (chl->channel == channel)
2579 /* Timeout callback. This is called if connection is idle or for some
2580 other reason is not responding within some period of time. This
2581 disconnects the remote end. */
2583 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2585 SilcServer server = (SilcServer)context;
2586 SilcSocketConnection sock = server->sockets[fd];
2591 if (sock->user_data)
2592 silc_server_free_sock_user_data(server, sock);
2594 silc_server_disconnect_remote(server, sock,
2595 "Server closed connection: "
2596 "Connection timeout");
2599 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2600 function may be used only by router. In real SILC network all channels
2601 are created by routers thus this function is never used by normal
2604 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2605 SilcServerID *router_id,
2611 SilcChannelID *channel_id;
2612 SilcChannelEntry entry;
2616 SILC_LOG_DEBUG(("Creating new channel"));
2619 cipher = "aes-256-cbc";
2621 hmac = "hmac-sha1-96";
2623 /* Allocate cipher */
2624 if (!silc_cipher_alloc(cipher, &key))
2628 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2629 silc_cipher_free(key);
2633 channel_name = strdup(channel_name);
2635 /* Create the channel */
2636 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2637 entry = silc_idlist_add_channel(server->local_list, channel_name,
2638 SILC_CHANNEL_MODE_NONE, channel_id,
2639 NULL, key, newhmac);
2641 silc_free(channel_name);
2645 entry->cipher = strdup(cipher);
2646 entry->hmac_name = strdup(hmac);
2648 /* Now create the actual key material */
2649 silc_server_create_channel_key(server, entry,
2650 silc_cipher_get_key_len(key) / 8);
2652 /* Notify other routers about the new channel. We send the packet
2653 to our primary route. */
2654 if (broadcast && server->standalone == FALSE)
2655 silc_server_send_new_channel(server, server->router->connection, TRUE,
2656 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2659 server->stat.my_channels++;
2664 /* Same as above but creates the channel with Channel ID `channel_id. */
2667 silc_server_create_new_channel_with_id(SilcServer server,
2671 SilcChannelID *channel_id,
2674 SilcChannelEntry entry;
2678 SILC_LOG_DEBUG(("Creating new channel"));
2681 cipher = "aes-256-cbc";
2683 hmac = "hmac-sha1-96";
2685 /* Allocate cipher */
2686 if (!silc_cipher_alloc(cipher, &key))
2690 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2691 silc_cipher_free(key);
2695 channel_name = strdup(channel_name);
2697 /* Create the channel */
2698 entry = silc_idlist_add_channel(server->local_list, channel_name,
2699 SILC_CHANNEL_MODE_NONE, channel_id,
2700 NULL, key, newhmac);
2702 silc_free(channel_name);
2706 /* Now create the actual key material */
2707 silc_server_create_channel_key(server, entry,
2708 silc_cipher_get_key_len(key) / 8);
2710 /* Notify other routers about the new channel. We send the packet
2711 to our primary route. */
2712 if (broadcast && server->standalone == FALSE)
2713 silc_server_send_new_channel(server, server->router->connection, TRUE,
2714 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2717 server->stat.my_channels++;
2722 /* Channel's key re-key timeout callback. */
2724 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2726 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2727 SilcServer server = (SilcServer)rekey->context;
2729 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2730 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2732 silc_task_register(server->timeout_queue, 0,
2733 silc_server_channel_key_rekey,
2734 (void *)rekey, 3600, 0,
2736 SILC_TASK_PRI_NORMAL);
2739 /* Generates new channel key. This is used to create the initial channel key
2740 but also to re-generate new key for channel. If `key_len' is provided
2741 it is the bytes of the key length. */
2743 void silc_server_create_channel_key(SilcServer server,
2744 SilcChannelEntry channel,
2745 unsigned int key_len)
2748 unsigned char channel_key[32], hash[32];
2751 SILC_LOG_DEBUG(("Generating channel key"));
2753 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2754 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2758 if (!channel->channel_key)
2759 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2764 else if (channel->key_len)
2765 len = channel->key_len / 8;
2767 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2769 /* Create channel key */
2770 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2773 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2775 /* Remove old key if exists */
2777 memset(channel->key, 0, channel->key_len / 8);
2778 silc_free(channel->key);
2782 channel->key_len = len * 8;
2783 channel->key = silc_calloc(len, sizeof(*channel->key));
2784 memcpy(channel->key, channel_key, len);
2785 memset(channel_key, 0, sizeof(channel_key));
2787 /* Generate HMAC key from the channel key data and set it */
2789 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2790 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2791 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2792 memset(hash, 0, sizeof(hash));
2794 if (server->server_type == SILC_ROUTER) {
2795 if (!channel->rekey)
2796 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2797 channel->rekey->context = (void *)server;
2798 channel->rekey->channel = channel;
2799 channel->rekey->key_len = key_len;
2801 silc_task_unregister_by_callback(server->timeout_queue,
2802 silc_server_channel_key_rekey);
2803 silc_task_register(server->timeout_queue, 0,
2804 silc_server_channel_key_rekey,
2805 (void *)channel->rekey, 3600, 0,
2807 SILC_TASK_PRI_NORMAL);
2811 /* Saves the channel key found in the encoded `key_payload' buffer. This
2812 function is used when we receive Channel Key Payload and also when we're
2813 processing JOIN command reply. Returns entry to the channel. */
2815 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2816 SilcBuffer key_payload,
2817 SilcChannelEntry channel)
2819 SilcChannelKeyPayload payload = NULL;
2820 SilcChannelID *id = NULL;
2821 unsigned char *tmp, hash[32];
2822 unsigned int tmp_len;
2825 SILC_LOG_DEBUG(("Start"));
2827 /* Decode channel key payload */
2828 payload = silc_channel_key_payload_parse(key_payload);
2830 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2835 /* Get the channel entry */
2838 /* Get channel ID */
2839 tmp = silc_channel_key_get_id(payload, &tmp_len);
2840 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2846 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2848 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2850 SILC_LOG_ERROR(("Received key for non-existent channel"));
2856 tmp = silc_channel_key_get_key(payload, &tmp_len);
2862 cipher = silc_channel_key_get_cipher(payload, NULL);
2868 /* Remove old key if exists */
2870 memset(channel->key, 0, channel->key_len / 8);
2871 silc_free(channel->key);
2872 silc_cipher_free(channel->channel_key);
2875 /* Create new cipher */
2876 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2881 if (channel->cipher)
2882 silc_free(channel->cipher);
2883 channel->cipher = strdup(cipher);
2886 channel->key_len = tmp_len * 8;
2887 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2888 memcpy(channel->key, tmp, tmp_len);
2889 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2891 /* Generate HMAC key from the channel key data and set it */
2893 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2894 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2895 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2897 memset(hash, 0, sizeof(hash));
2898 memset(tmp, 0, tmp_len);
2900 if (server->server_type == SILC_ROUTER) {
2901 if (!channel->rekey)
2902 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2903 channel->rekey->context = (void *)server;
2904 channel->rekey->channel = channel;
2906 silc_task_unregister_by_callback(server->timeout_queue,
2907 silc_server_channel_key_rekey);
2908 silc_task_register(server->timeout_queue, 0,
2909 silc_server_channel_key_rekey,
2910 (void *)channel->rekey, 3600, 0,
2912 SILC_TASK_PRI_NORMAL);
2919 silc_channel_key_payload_free(payload);
2924 /* Heartbeat callback. This function is set as argument for the
2925 silc_socket_set_heartbeat function. The library will call this function
2926 at the set time interval. */
2928 void silc_server_perform_heartbeat(SilcSocketConnection sock,
2931 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
2933 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
2936 /* Send the heartbeat */
2937 silc_server_send_heartbeat(hb->server, sock);
2940 /* Returns assembled of all servers in the given ID list. The packet's
2941 form is dictated by the New ID payload. */
2943 static void silc_server_announce_get_servers(SilcServer server,
2945 SilcBuffer *servers)
2947 SilcIDCacheList list;
2948 SilcIDCacheEntry id_cache;
2949 SilcServerEntry entry;
2952 /* Go through all clients in the list */
2953 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
2954 SILC_ID_SERVER, &list)) {
2955 if (silc_idcache_list_first(list, &id_cache)) {
2957 entry = (SilcServerEntry)id_cache->context;
2959 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2961 *servers = silc_buffer_realloc(*servers,
2963 (*servers)->truelen + idp->len :
2965 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
2966 silc_buffer_put(*servers, idp->data, idp->len);
2967 silc_buffer_pull(*servers, idp->len);
2968 silc_buffer_free(idp);
2970 if (!silc_idcache_list_next(list, &id_cache))
2975 silc_idcache_list_free(list);
2979 /* This function is used by router to announce existing servers to our
2980 primary router when we've connected to it. */
2982 void silc_server_announce_servers(SilcServer server)
2984 SilcBuffer servers = NULL;
2986 SILC_LOG_DEBUG(("Announcing servers"));
2988 /* Get servers in local list */
2989 silc_server_announce_get_servers(server, server->local_list, &servers);
2991 /* Get servers in global list */
2992 silc_server_announce_get_servers(server, server->global_list, &servers);
2995 silc_buffer_push(servers, servers->data - servers->head);
2996 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
2998 /* Send the packet */
2999 silc_server_packet_send(server, server->router->connection,
3000 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3001 servers->data, servers->len, TRUE);
3003 silc_buffer_free(servers);
3007 /* Returns assembled packet of all clients in the given ID list. The
3008 packet's form is dictated by the New ID Payload. */
3010 static void silc_server_announce_get_clients(SilcServer server,
3012 SilcBuffer *clients)
3014 SilcIDCacheList list;
3015 SilcIDCacheEntry id_cache;
3016 SilcClientEntry client;
3019 /* Go through all clients in the list */
3020 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3021 SILC_ID_CLIENT, &list)) {
3022 if (silc_idcache_list_first(list, &id_cache)) {
3024 client = (SilcClientEntry)id_cache->context;
3026 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3028 *clients = silc_buffer_realloc(*clients,
3030 (*clients)->truelen + idp->len :
3032 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3033 silc_buffer_put(*clients, idp->data, idp->len);
3034 silc_buffer_pull(*clients, idp->len);
3035 silc_buffer_free(idp);
3037 if (!silc_idcache_list_next(list, &id_cache))
3042 silc_idcache_list_free(list);
3046 /* This function is used to announce our existing clients to our router
3047 when we've connected to it. */
3049 void silc_server_announce_clients(SilcServer server)
3051 SilcBuffer clients = NULL;
3053 SILC_LOG_DEBUG(("Announcing clients"));
3055 /* Get clients in local list */
3056 silc_server_announce_get_clients(server, server->local_list,
3059 /* As router we announce our global list as well */
3060 if (server->server_type == SILC_ROUTER)
3061 silc_server_announce_get_clients(server, server->global_list,
3065 silc_buffer_push(clients, clients->data - clients->head);
3066 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3068 /* Send the packet */
3069 silc_server_packet_send(server, server->router->connection,
3070 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3071 clients->data, clients->len, TRUE);
3073 silc_buffer_free(clients);
3078 silc_server_announce_encode_join(unsigned int argc, ...)
3083 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3086 /* Returns assembled packets for channel users of the `channel'. */
3088 void silc_server_announce_get_channel_users(SilcServer server,
3089 SilcChannelEntry channel,
3090 SilcBuffer *channel_users)
3092 SilcChannelClientEntry chl;
3093 SilcBuffer chidp, clidp;
3097 SILC_LOG_DEBUG(("Start"));
3099 /* Now find all users on the channel */
3100 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3101 silc_list_start(channel->user_list);
3102 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3103 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3104 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3105 chidp->data, chidp->len);
3108 silc_buffer_realloc(*channel_users,
3110 (*channel_users)->truelen + len : len));
3111 silc_buffer_pull_tail(*channel_users,
3112 ((*channel_users)->end -
3113 (*channel_users)->data));
3115 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3116 silc_buffer_pull(*channel_users, len);
3117 silc_buffer_free(clidp);
3118 silc_buffer_free(tmp);
3120 silc_buffer_free(chidp);
3123 /* Returns assembled packets for all channels and users on those channels
3124 from the given ID List. The packets are in the form dictated by the
3125 New Channel and New Channel User payloads. */
3127 void silc_server_announce_get_channels(SilcServer server,
3129 SilcBuffer *channels,
3130 SilcBuffer *channel_users)
3132 SilcIDCacheList list;
3133 SilcIDCacheEntry id_cache;
3134 SilcChannelEntry channel;
3136 unsigned short name_len;
3139 SILC_LOG_DEBUG(("Start"));
3141 /* Go through all channels in the list */
3142 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3143 SILC_ID_CHANNEL, &list)) {
3144 if (silc_idcache_list_first(list, &id_cache)) {
3146 channel = (SilcChannelEntry)id_cache->context;
3148 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3149 name_len = strlen(channel->channel_name);
3151 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3153 silc_buffer_realloc(*channels,
3154 (*channels ? (*channels)->truelen + len : len));
3155 silc_buffer_pull_tail(*channels,
3156 ((*channels)->end - (*channels)->data));
3157 silc_buffer_format(*channels,
3158 SILC_STR_UI_SHORT(name_len),
3159 SILC_STR_UI_XNSTRING(channel->channel_name,
3161 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3162 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3163 SILC_STR_UI_INT(channel->mode),
3165 silc_buffer_pull(*channels, len);
3167 silc_server_announce_get_channel_users(server, channel,
3172 if (!silc_idcache_list_next(list, &id_cache))
3177 silc_idcache_list_free(list);
3181 /* This function is used to announce our existing channels to our router
3182 when we've connected to it. This also announces the users on the
3183 channels to the router. */
3185 void silc_server_announce_channels(SilcServer server)
3187 SilcBuffer channels = NULL, channel_users = NULL;
3189 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3191 /* Get channels and channel users in local list */
3192 silc_server_announce_get_channels(server, server->local_list,
3193 &channels, &channel_users);
3195 /* Get channels and channel users in global list */
3196 silc_server_announce_get_channels(server, server->global_list,
3197 &channels, &channel_users);
3200 silc_buffer_push(channels, channels->data - channels->head);
3201 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3203 /* Send the packet */
3204 silc_server_packet_send(server, server->router->connection,
3205 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3206 channels->data, channels->len,
3209 silc_buffer_free(channels);
3212 if (channel_users) {
3213 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3214 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3215 channel_users->len);
3217 /* Send the packet */
3218 silc_server_packet_send(server, server->router->connection,
3219 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3220 channel_users->data, channel_users->len,
3223 silc_buffer_free(channel_users);
3227 /* Failure timeout callback. If this is called then we will immediately
3228 process the received failure. We always process the failure with timeout
3229 since we do not want to blindly trust to received failure packets.
3230 This won't be called (the timeout is cancelled) if the failure was
3231 bogus (it is bogus if remote does not close the connection after sending
3234 SILC_TASK_CALLBACK(silc_server_failure_callback)
3236 SilcServerFailureContext f = (SilcServerFailureContext)context;
3238 if (f->sock->protocol) {
3239 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3240 f->sock->protocol->execute(f->server->timeout_queue, 0,
3241 f->sock->protocol, f->sock->sock, 0, 0);
3247 /* Assembles user list and users mode list from the `channel'. */
3249 void silc_server_get_users_on_channel(SilcServer server,
3250 SilcChannelEntry channel,
3251 SilcBuffer *user_list,
3252 SilcBuffer *mode_list,
3253 unsigned int *user_count)
3255 SilcChannelClientEntry chl;
3256 SilcBuffer client_id_list;
3257 SilcBuffer client_mode_list;
3259 unsigned int list_count = 0;
3261 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3262 silc_list_count(channel->user_list));
3263 client_mode_list = silc_buffer_alloc(4 *
3264 silc_list_count(channel->user_list));
3265 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3266 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3267 silc_list_start(channel->user_list);
3268 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3270 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3271 silc_buffer_put(client_id_list, idp->data, idp->len);
3272 silc_buffer_pull(client_id_list, idp->len);
3273 silc_buffer_free(idp);
3275 /* Client's mode on channel */
3276 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3277 silc_buffer_pull(client_mode_list, 4);
3281 silc_buffer_push(client_id_list,
3282 client_id_list->data - client_id_list->head);
3283 silc_buffer_push(client_mode_list,
3284 client_mode_list->data - client_mode_list->head);
3286 *user_list = client_id_list;
3287 *mode_list = client_mode_list;
3288 *user_count = list_count;
3291 /* Saves users and their modes to the `channel'. */
3293 void silc_server_save_users_on_channel(SilcServer server,
3294 SilcSocketConnection sock,
3295 SilcChannelEntry channel,
3296 SilcClientID *noadd,
3297 SilcBuffer user_list,
3298 SilcBuffer mode_list,
3299 unsigned int user_count)
3303 /* Cache the received Client ID's and modes. This cache expires
3304 whenever server sends notify message to channel. It means two things;
3305 some user has joined or leaved the channel. XXX TODO! */
3306 for (i = 0; i < user_count; i++) {
3307 unsigned short idp_len;
3309 SilcClientID *client_id;
3310 SilcClientEntry client;
3313 SILC_GET16_MSB(idp_len, user_list->data + 2);
3315 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3316 silc_buffer_pull(user_list, idp_len);
3321 SILC_GET32_MSB(mode, mode_list->data);
3322 silc_buffer_pull(mode_list, 4);
3324 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3325 silc_free(client_id);
3329 /* Check if we have this client cached already. */
3330 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3333 client = silc_idlist_find_client_by_id(server->global_list,
3336 /* If router did not find such Client ID in its lists then this must
3337 be bogus client or some router in the net is buggy. */
3338 if (server->server_type == SILC_ROUTER) {
3339 silc_free(client_id);
3343 /* We don't have that client anywhere, add it. The client is added
3344 to global list since server didn't have it in the lists so it must be
3346 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3348 silc_id_dup(client_id, SILC_ID_CLIENT),
3349 sock->user_data, NULL);
3351 silc_free(client_id);
3355 client->data.registered = TRUE;
3358 silc_free(client_id);
3360 if (!silc_server_client_on_channel(client, channel)) {
3361 /* Client was not on the channel, add it. */
3362 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3363 chl->client = client;
3365 chl->channel = channel;
3366 silc_list_add(channel->user_list, chl);
3367 silc_list_add(client->channels, chl);
3372 /* Lookups route to the client indicated by `id' client ID. The connection
3373 object and internal data object is returned. Returns NULL if route
3374 could not be found to the client. If the `client_id' is specified then
3375 it is used and the `id_data' is ignored. */
3377 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3378 unsigned char *id_data,
3379 unsigned int id_len,
3380 SilcClientID *client_id,
3381 SilcIDListData *idata)
3384 SilcClientEntry client;
3386 SILC_LOG_DEBUG(("Start"));
3388 /* Decode destination Client ID */
3390 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3392 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3396 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3399 /* If the destination belongs to our server we don't have to route
3400 the packet anywhere but to send it to the local destination. */
3401 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3405 if (client && client->data.registered == FALSE)
3408 /* If we are router and the client has router then the client is in
3409 our cell but not directly connected to us. */
3410 if (server->server_type == SILC_ROUTER && client->router) {
3411 /* We are of course in this case the client's router thus the real
3412 "router" of the client is the server who owns the client. Thus
3413 we will send the packet to that server. */
3414 *idata = (SilcIDListData)client->router;
3415 return client->router->connection;
3418 /* Seems that client really is directly connected to us */
3419 *idata = (SilcIDListData)client;
3420 return client->connection;
3423 /* Destination belongs to someone not in this server. If we are normal
3424 server our action is to send the packet to our router. */
3425 if (server->server_type == SILC_SERVER && !server->standalone) {
3427 *idata = (SilcIDListData)server->router;
3428 return server->router->connection;
3431 /* We are router and we will perform route lookup for the destination
3432 and send the packet to fastest route. */
3433 if (server->server_type == SILC_ROUTER && !server->standalone) {
3434 /* Check first that the ID is valid */
3435 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3437 SilcSocketConnection dst_sock;
3439 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3442 *idata = (SilcIDListData)dst_sock->user_data;
3451 /* Encodes and returns channel list of channels the `client' has joined.
3452 Secret channels are not put to the list. */
3454 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3455 SilcClientEntry client)
3457 SilcBuffer buffer = NULL;
3458 SilcChannelEntry channel;
3459 SilcChannelClientEntry chl;
3461 unsigned short name_len;
3464 silc_list_start(client->channels);
3465 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3466 channel = chl->channel;
3468 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3471 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3472 name_len = strlen(channel->channel_name);
3474 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3475 buffer = silc_buffer_realloc(buffer,
3476 (buffer ? (buffer)->truelen + len : len));
3477 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3478 silc_buffer_format(buffer,
3479 SILC_STR_UI_SHORT(name_len),
3480 SILC_STR_UI_XNSTRING(channel->channel_name,
3482 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3483 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3484 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3486 silc_buffer_pull(buffer, len);
3491 silc_buffer_push(buffer, buffer->data - buffer->head);
3496 /* Finds client entry by Client ID and if it is not found then resolves
3497 it using WHOIS command. */
3499 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3500 SilcClientID *client_id)
3502 SilcClientEntry client;
3504 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3506 client = silc_idlist_find_client_by_id(server->global_list,
3508 if (!client && server->server_type == SILC_ROUTER)
3512 if (!client && server->standalone)
3515 if (!client || !client->nickname || !client->username) {
3516 SilcBuffer buffer, idp;
3518 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3519 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3520 ++server->cmd_ident, 1,
3521 3, idp->data, idp->len);
3522 silc_server_packet_send(server, client ? client->router->connection :
3523 server->router->connection,
3524 SILC_PACKET_COMMAND, 0,
3525 buffer->data, buffer->len, FALSE);
3526 silc_buffer_free(idp);
3527 silc_buffer_free(buffer);