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);
42 SILC_TASK_CALLBACK(silc_server_rekey_callback);
44 /* Allocates a new SILC server object. This has to be done before the server
45 can be used. After allocation one must call silc_server_init to initialize
46 the server. The new allocated server object is returned to the new_server
49 int silc_server_alloc(SilcServer *new_server)
53 SILC_LOG_DEBUG(("Allocating new server object"));
55 server = silc_calloc(1, sizeof(*server));
56 server->server_type = SILC_SERVER;
57 server->standalone = TRUE;
58 server->local_list = silc_calloc(1, sizeof(*server->local_list));
59 server->global_list = silc_calloc(1, sizeof(*server->global_list));
60 server->pending_commands = silc_dlist_init();
62 server->sim = silc_dlist_init();
70 /* Free's the SILC server object. This is called at the very end before
73 void silc_server_free(SilcServer server)
80 if (server->local_list)
81 silc_free(server->local_list);
82 if (server->global_list)
83 silc_free(server->global_list);
85 silc_rng_free(server->rng);
88 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
89 silc_dlist_del(server->sim, sim);
92 silc_dlist_uninit(server->sim);
96 silc_free(server->params);
98 if (server->pending_commands)
99 silc_dlist_uninit(server->pending_commands);
105 /* Initializes the entire SILC server. This is called always before running
106 the server. This is called only once at the initialization of the program.
107 This binds the server to its listenning port. After this function returns
108 one should call silc_server_run to start the server. This returns TRUE
109 when everything is ok to run the server. Configuration file must be
110 read and parsed before calling this. */
112 int silc_server_init(SilcServer server)
114 int *sock = NULL, sock_count = 0, i;
116 SilcServerEntry id_entry;
117 SilcIDListPurge purge;
119 SILC_LOG_DEBUG(("Initializing server"));
121 assert(server->config);
123 /* Set public and private keys */
124 server->public_key = server->config->server_keys->public_key;
125 server->private_key = server->config->server_keys->private_key;
126 if (!server->public_key || !server->private_key) {
127 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
131 /* XXX After server is made as Silc Server Library this can be given
132 as argument, for now this is hard coded */
133 server->params = silc_calloc(1, sizeof(*server->params));
134 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
135 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
136 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
137 server->params->retry_keep_trying = FALSE;
138 server->params->protocol_timeout = 60;
139 server->params->require_reverse_mapping = FALSE;
141 /* Set log files where log message should be saved. */
142 server->config->server = server;
143 silc_server_config_setlogfiles(server->config);
145 /* Register all configured ciphers, PKCS and hash functions. */
146 silc_server_config_register_ciphers(server->config);
147 silc_server_config_register_pkcs(server->config);
148 silc_server_config_register_hashfuncs(server->config);
149 silc_server_config_register_hmacs(server->config);
151 /* Initialize random number generator for the server. */
152 server->rng = silc_rng_alloc();
153 silc_rng_init(server->rng);
154 silc_rng_global_init(server->rng);
156 /* Initialize hash functions for server to use */
157 silc_hash_alloc("md5", &server->md5hash);
158 silc_hash_alloc("sha1", &server->sha1hash);
160 /* Initialize none cipher */
161 silc_cipher_alloc("none", &server->none_cipher);
163 /* Create a listening server. Note that our server can listen on
164 multiple ports. All listeners are created here and now. */
165 /* XXX Still check this whether to use server_info or listen_port. */
167 while(server->config->listen_port) {
170 tmp = silc_net_create_server(server->config->listen_port->port,
171 server->config->listen_port->host);
175 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
176 sock[sock_count] = tmp;
177 server->config->listen_port = server->config->listen_port->next;
181 /* Initialize ID caches */
182 server->local_list->clients =
183 silc_idcache_alloc(0, silc_idlist_client_destructor);
184 server->local_list->servers = silc_idcache_alloc(0, NULL);
185 server->local_list->channels = silc_idcache_alloc(0, NULL);
187 /* These are allocated for normal server as well as these hold some
188 global information that the server has fetched from its router. For
189 router these are used as they are supposed to be used on router. */
190 server->global_list->clients =
191 silc_idcache_alloc(0, silc_idlist_client_destructor);
192 server->global_list->servers = silc_idcache_alloc(0, NULL);
193 server->global_list->channels = silc_idcache_alloc(0, NULL);
195 /* Allocate the entire socket list that is used in server. Eventually
196 all connections will have entry in this table (it is a table of
197 pointers to the actual object that is allocated individually
199 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
200 sizeof(*server->sockets));
202 for (i = 0; i < sock_count; i++) {
203 SilcSocketConnection newsocket = NULL;
205 /* Set socket to non-blocking mode */
206 silc_net_set_socket_nonblock(sock[i]);
207 server->sock = sock[i];
209 /* Create a Server ID for the server. */
210 silc_id_create_server_id(sock[i], server->rng, &id);
216 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
217 server->id_string_len = silc_id_get_len(SILC_ID_SERVER);
218 server->id_type = SILC_ID_SERVER;
219 server->server_name = server->config->server_info->server_name;
221 /* Add ourselves to the server list. We don't have a router yet
222 beacuse we haven't established a route yet. It will be done later.
223 For now, NULL is sent as router. This allocates new entry to
226 silc_idlist_add_server(server->local_list,
227 server->config->server_info->server_name,
228 server->server_type, server->id, NULL, NULL);
230 SILC_LOG_ERROR(("Could not add ourselves to cache"));
234 /* Add ourselves also to the socket table. The entry allocated above
235 is sent as argument for fast referencing in the future. */
236 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
239 server->sockets[sock[i]] = newsocket;
241 /* Put the allocated socket pointer also to the entry allocated above
242 for fast back-referencing to the socket list. */
243 id_entry->connection = (void *)server->sockets[sock[i]];
244 server->id_entry = id_entry;
247 /* Register the task queues. In SILC we have by default three task queues.
248 One task queue for non-timeout tasks which perform different kind of
249 I/O on file descriptors, timeout task queue for timeout tasks, and,
250 generic non-timeout task queue whose tasks apply to all connections. */
251 silc_task_queue_alloc(&server->io_queue, TRUE);
252 if (!server->io_queue) {
255 silc_task_queue_alloc(&server->timeout_queue, TRUE);
256 if (!server->timeout_queue) {
259 silc_task_queue_alloc(&server->generic_queue, TRUE);
260 if (!server->generic_queue) {
264 /* Register protocols */
265 silc_server_protocols_register();
267 /* Initialize the scheduler */
268 silc_schedule_init(&server->io_queue, &server->timeout_queue,
269 &server->generic_queue,
270 SILC_SERVER_MAX_CONNECTIONS);
272 /* Add the first task to the queue. This is task that is executed by
273 timeout. It expires as soon as the caller calls silc_server_run. This
274 task performs authentication protocol and key exchange with our
276 silc_task_register(server->timeout_queue, sock[0],
277 silc_server_connect_to_router,
278 (void *)server, 0, 1,
280 SILC_TASK_PRI_NORMAL);
282 /* Add listener task to the queue. This task receives new connections to the
283 server. This task remains on the queue until the end of the program. */
284 silc_task_register(server->io_queue, sock[0],
285 silc_server_accept_new_connection,
286 (void *)server, 0, 0,
288 SILC_TASK_PRI_NORMAL);
289 server->listenning = TRUE;
291 /* If server connections has been configured then we must be router as
292 normal server cannot have server connections, only router connections. */
293 if (server->config->servers)
294 server->server_type = SILC_ROUTER;
296 /* Register the ID Cache purge task. This periodically purges the ID cache
297 and removes the expired cache entries. */
299 /* Clients local list */
300 purge = silc_calloc(1, sizeof(*purge));
301 purge->cache = server->local_list->clients;
302 purge->timeout_queue = server->timeout_queue;
303 silc_task_register(purge->timeout_queue, 0,
305 (void *)purge, 600, 0,
306 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
308 /* Clients global list */
309 purge = silc_calloc(1, sizeof(*purge));
310 purge->cache = server->global_list->clients;
311 purge->timeout_queue = server->timeout_queue;
312 silc_task_register(purge->timeout_queue, 0,
314 (void *)purge, 300, 0,
315 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
317 SILC_LOG_DEBUG(("Server initialized"));
319 /* We are done here, return succesfully */
322 silc_task_queue_free(server->timeout_queue);
324 silc_task_queue_free(server->io_queue);
326 for (i = 0; i < sock_count; i++)
327 silc_net_close_server(sock[i]);
332 /* Fork server to background and set gid+uid to non-root.
333 Silcd will not run as root, so trying to set either user or group to
334 root will cause silcd to exit. */
336 void silc_server_daemonise(SilcServer server)
338 /* Are we executing silcd as root or a regular user? */
345 if (!server->config->identity || !server->config->identity->user ||
346 !server->config->identity->group) {
347 fprintf(stderr, "Error:"
348 "\tSILC server must not be run as root. For the security of your\n"
349 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
350 "\tuser account. Modify the [Identity] configuration section to run\n"
351 "\tthe server as non-root user.\n");
355 /* Get the values given for user and group in configuration file */
356 user=server->config->identity->user;
357 group=server->config->identity->group;
359 /* Check whether the user/group information is text */
360 if (atoi(user)!=0 || atoi(group)!=0) {
361 SILC_LOG_DEBUG(("Invalid user and/or group information"));
362 SILC_LOG_DEBUG(("User and/or group given as number"));
363 fprintf(stderr, "Invalid user and/or group information\n");
364 fprintf(stderr, "Please assign them as names, not numbers\n");
368 /* Catch the nasty incident of string "0" returning 0 from atoi */
369 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
370 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
371 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
379 fprintf(stderr, "No such user %s found\n", user);
384 fprintf(stderr, "No such group %s found\n", group);
388 /* Check whether user and/or group is set to root. If yes, exit
389 immediately. Otherwise, setgid and setuid server to user.group */
390 if (gr->gr_gid==0 || pw->pw_uid==0) {
391 fprintf(stderr, "Error:"
392 "\tSILC server must not be run as root. For the security of your\n"
393 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
394 "\tuser account. Modify the [Identity] configuration section to run\n"
395 "\tthe server as non-root user.\n");
398 /* Fork server to background, making it a daemon */
400 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
401 SILC_LOG_DEBUG(("Forking SILC server to background"));
406 SILC_LOG_DEBUG(("Changing to group %s", group));
407 if(setgid(gr->gr_gid)==0) {
408 SILC_LOG_DEBUG(("Setgid to %s", group));
410 SILC_LOG_DEBUG(("Setgid to %s failed", group));
411 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
415 SILC_LOG_DEBUG(("Changing to user nobody"));
416 if(setuid(pw->pw_uid)==0) {
417 SILC_LOG_DEBUG(("Setuid to %s", user));
419 SILC_LOG_DEBUG(("Setuid to %s failed", user));
420 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
426 /* Fork server to background, making it a daemon */
428 SILC_LOG_DEBUG(("Server started as user"));
429 SILC_LOG_DEBUG(("Forking SILC server to background"));
436 /* Stops the SILC server. This function is used to shutdown the server.
437 This is usually called after the scheduler has returned. After stopping
438 the server one should call silc_server_free. */
440 void silc_server_stop(SilcServer server)
442 SILC_LOG_DEBUG(("Stopping server"));
444 /* Stop the scheduler, although it might be already stopped. This
445 doesn't hurt anyone. This removes all the tasks and task queues,
447 silc_schedule_stop();
448 silc_schedule_uninit();
450 silc_server_protocols_unregister();
452 SILC_LOG_DEBUG(("Server stopped"));
455 /* The heart of the server. This runs the scheduler thus runs the server.
456 When this returns the server has been stopped and the program will
459 void silc_server_run(SilcServer server)
461 SILC_LOG_DEBUG(("Running server"));
463 /* Start the scheduler, the heart of the SILC server. When this returns
464 the program will be terminated. */
468 /* Timeout callback that will be called to retry connecting to remote
469 router. This is used by both normal and router server. This will wait
470 before retrying the connecting. The timeout is generated by exponential
471 backoff algorithm. */
473 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
475 SilcServerConnection sconn = (SilcServerConnection)context;
476 SilcServer server = sconn->server;
478 SILC_LOG_INFO(("Retrying connecting to a router"));
480 /* Calculate next timeout */
481 if (sconn->retry_count >= 1) {
482 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
483 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
484 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
486 sconn->retry_timeout = server->params->retry_interval_min;
488 sconn->retry_count++;
489 sconn->retry_timeout = sconn->retry_timeout +
490 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
492 /* If we've reached max retry count, give up. */
493 if (sconn->retry_count > server->params->retry_count &&
494 server->params->retry_keep_trying == FALSE) {
495 SILC_LOG_ERROR(("Could not connect to router, giving up"));
499 /* Wait one before retrying */
500 silc_task_register(server->timeout_queue, fd, silc_server_connect_router,
501 context, sconn->retry_timeout,
502 server->params->retry_interval_min_usec,
503 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
506 /* Generic routine to use connect to a router. */
508 SILC_TASK_CALLBACK(silc_server_connect_router)
510 SilcServerConnection sconn = (SilcServerConnection)context;
511 SilcServer server = sconn->server;
512 SilcSocketConnection newsocket;
513 SilcProtocol protocol;
514 SilcServerKEInternalContext *proto_ctx;
517 SILC_LOG_INFO(("Connecting to the router %s on port %d",
518 sconn->remote_host, sconn->remote_port));
520 /* Connect to remote host */
521 sock = silc_net_create_connection(sconn->remote_port,
524 SILC_LOG_ERROR(("Could not connect to router"));
525 silc_task_register(server->timeout_queue, fd,
526 silc_server_connect_to_router_retry,
527 context, 0, 1, SILC_TASK_TIMEOUT,
528 SILC_TASK_PRI_NORMAL);
532 /* Set socket options */
533 silc_net_set_socket_nonblock(sock);
534 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
536 /* Create socket connection for the connection. Even though we
537 know that we are connecting to a router we will mark the socket
538 to be unknown connection until we have executed authentication
540 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
541 server->sockets[sock] = newsocket;
542 newsocket->hostname = strdup(sconn->remote_host);
543 newsocket->ip = strdup(sconn->remote_host);
544 newsocket->port = sconn->remote_port;
545 sconn->sock = newsocket;
547 /* Allocate internal protocol context. This is sent as context
549 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
550 proto_ctx->server = (void *)server;
551 proto_ctx->context = (void *)sconn;
552 proto_ctx->sock = newsocket;
553 proto_ctx->rng = server->rng;
554 proto_ctx->responder = FALSE;
556 /* Perform key exchange protocol. silc_server_connect_to_router_second
557 will be called after the protocol is finished. */
558 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
559 &protocol, proto_ctx,
560 silc_server_connect_to_router_second);
561 newsocket->protocol = protocol;
563 /* Register a timeout task that will be executed if the protocol
564 is not executed within set limit. */
565 proto_ctx->timeout_task =
566 silc_task_register(server->timeout_queue, sock,
567 silc_server_timeout_remote,
568 server, server->params->protocol_timeout,
569 server->params->protocol_timeout_usec,
573 /* Register the connection for network input and output. This sets
574 that scheduler will listen for incoming packets for this connection
575 and sets that outgoing packets may be sent to this connection as
576 well. However, this doesn't set the scheduler for outgoing traffic,
577 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
578 later when outgoing data is available. */
579 context = (void *)server;
580 SILC_REGISTER_CONNECTION_FOR_IO(sock);
582 /* Run the protocol */
583 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
586 /* This function connects to our primary router or if we are a router this
587 establishes all our primary routes. This is called at the start of the
588 server to do authentication and key exchange with our router - called
591 SILC_TASK_CALLBACK(silc_server_connect_to_router)
593 SilcServer server = (SilcServer)context;
594 SilcServerConnection sconn;
596 SILC_LOG_DEBUG(("Connecting to router(s)"));
598 /* If we are normal SILC server we need to connect to our cell's
600 if (server->server_type == SILC_SERVER) {
601 SILC_LOG_DEBUG(("We are normal server"));
603 /* Create connection to the router, if configured. */
604 if (server->config->routers) {
606 /* Allocate connection object for hold connection specific stuff. */
607 sconn = silc_calloc(1, sizeof(*sconn));
608 sconn->server = server;
609 sconn->remote_host = strdup(server->config->routers->host);
610 sconn->remote_port = server->config->routers->port;
612 silc_task_register(server->timeout_queue, fd,
613 silc_server_connect_router,
614 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
615 SILC_TASK_PRI_NORMAL);
620 /* If we are a SILC router we need to establish all of our primary
622 if (server->server_type == SILC_ROUTER) {
623 SilcServerConfigSectionServerConnection *ptr;
625 SILC_LOG_DEBUG(("We are router"));
627 /* Create the connections to all our routes */
628 ptr = server->config->routers;
631 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
632 ptr->initiator ? "Initiator" : "Responder",
633 ptr->host, ptr->port));
635 if (ptr->initiator) {
636 /* Allocate connection object for hold connection specific stuff. */
637 sconn = silc_calloc(1, sizeof(*sconn));
638 sconn->server = server;
639 sconn->remote_host = strdup(ptr->host);
640 sconn->remote_port = ptr->port;
642 silc_task_register(server->timeout_queue, fd,
643 silc_server_connect_router,
644 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
645 SILC_TASK_PRI_NORMAL);
655 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
657 /* There wasn't a configured router, we will continue but we don't
658 have a connection to outside world. We will be standalone server. */
659 server->standalone = TRUE;
662 /* Second part of connecting to router(s). Key exchange protocol has been
663 executed and now we will execute authentication protocol. */
665 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
667 SilcProtocol protocol = (SilcProtocol)context;
668 SilcServerKEInternalContext *ctx =
669 (SilcServerKEInternalContext *)protocol->context;
670 SilcServer server = (SilcServer)ctx->server;
671 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
672 SilcSocketConnection sock = server->sockets[fd];
673 SilcServerConnAuthInternalContext *proto_ctx;
674 SilcServerConfigSectionServerConnection *conn = NULL;
676 SILC_LOG_DEBUG(("Start"));
678 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
679 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
680 /* Error occured during protocol */
681 silc_protocol_free(protocol);
682 sock->protocol = NULL;
683 silc_ske_free_key_material(ctx->keymat);
685 silc_packet_context_free(ctx->packet);
687 silc_ske_free(ctx->ske);
689 silc_free(ctx->dest_id);
691 silc_task_unregister_by_callback(server->timeout_queue,
692 silc_server_failure_callback);
693 silc_server_disconnect_remote(server, sock, "Server closed connection: "
694 "Key exchange failed");
698 /* We now have the key material as the result of the key exchange
699 protocol. Take the key material into use. Free the raw key material
700 as soon as we've set them into use. */
701 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
702 ctx->ske->prop->cipher,
703 ctx->ske->prop->pkcs,
704 ctx->ske->prop->hash,
705 ctx->ske->prop->hmac,
706 ctx->ske->prop->group,
708 silc_protocol_free(protocol);
709 sock->protocol = NULL;
710 silc_ske_free_key_material(ctx->keymat);
712 silc_packet_context_free(ctx->packet);
714 silc_ske_free(ctx->ske);
716 silc_free(ctx->dest_id);
718 silc_task_unregister_by_callback(server->timeout_queue,
719 silc_server_failure_callback);
720 silc_server_disconnect_remote(server, sock, "Server closed connection: "
721 "Key exchange failed");
724 silc_ske_free_key_material(ctx->keymat);
726 /* Allocate internal context for the authentication protocol. This
727 is sent as context for the protocol. */
728 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
729 proto_ctx->server = (void *)server;
730 proto_ctx->context = (void *)sconn;
731 proto_ctx->sock = sock;
732 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
733 proto_ctx->dest_id_type = ctx->dest_id_type;
734 proto_ctx->dest_id = ctx->dest_id;
736 /* Resolve the authentication method used in this connection. Check if
737 we find a match from user configured connections */
738 conn = silc_server_config_find_router_conn(server->config,
742 /* Match found. Use the configured authentication method */
743 proto_ctx->auth_meth = conn->auth_meth;
744 if (conn->auth_data) {
745 proto_ctx->auth_data = strdup(conn->auth_data);
746 proto_ctx->auth_data_len = strlen(conn->auth_data);
749 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
750 sock->hostname, sock->ip, sock->port));
751 silc_protocol_free(protocol);
752 sock->protocol = NULL;
754 silc_packet_context_free(ctx->packet);
756 silc_ske_free(ctx->ske);
758 silc_free(ctx->dest_id);
760 silc_task_unregister_by_callback(server->timeout_queue,
761 silc_server_failure_callback);
762 silc_server_disconnect_remote(server, sock, "Server closed connection: "
763 "Key exchange failed");
767 /* Free old protocol as it is finished now */
768 silc_protocol_free(protocol);
770 silc_packet_context_free(ctx->packet);
772 sock->protocol = NULL;
774 /* Allocate the authentication protocol. This is allocated here
775 but we won't start it yet. We will be receiving party of this
776 protocol thus we will wait that connecting party will make
778 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
779 &sock->protocol, proto_ctx,
780 silc_server_connect_to_router_final);
782 /* Register timeout task. If the protocol is not executed inside
783 this timelimit the connection will be terminated. Currently
784 this is 15 seconds and is hard coded limit (XXX). */
785 proto_ctx->timeout_task =
786 silc_task_register(server->timeout_queue, sock->sock,
787 silc_server_timeout_remote,
788 (void *)server, 15, 0,
792 /* Run the protocol */
793 sock->protocol->execute(server->timeout_queue, 0,
794 sock->protocol, sock->sock, 0, 0);
797 /* Finalizes the connection to router. Registers a server task to the
798 queue so that we can accept new connections. */
800 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
802 SilcProtocol protocol = (SilcProtocol)context;
803 SilcServerConnAuthInternalContext *ctx =
804 (SilcServerConnAuthInternalContext *)protocol->context;
805 SilcServer server = (SilcServer)ctx->server;
806 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
807 SilcSocketConnection sock = ctx->sock;
808 SilcServerEntry id_entry;
810 SilcServerHBContext hb_context;
811 unsigned char *id_string;
812 SilcIDListData idata;
814 SILC_LOG_DEBUG(("Start"));
816 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
817 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
818 /* Error occured during protocol */
820 silc_free(ctx->dest_id);
821 silc_server_disconnect_remote(server, sock, "Server closed connection: "
822 "Authentication failed");
826 /* Add a task to the queue. This task receives new connections to the
827 server. This task remains on the queue until the end of the program. */
828 if (!server->listenning) {
829 silc_task_register(server->io_queue, server->sock,
830 silc_server_accept_new_connection,
831 (void *)server, 0, 0,
833 SILC_TASK_PRI_NORMAL);
834 server->listenning = TRUE;
837 /* Send NEW_SERVER packet to the router. We will become registered
838 to the SILC network after sending this packet. */
839 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
840 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
841 strlen(server->server_name));
842 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
843 silc_buffer_format(packet,
844 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
845 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
846 SILC_STR_UI_SHORT(strlen(server->server_name)),
847 SILC_STR_UI_XNSTRING(server->server_name,
848 strlen(server->server_name)),
851 /* Send the packet */
852 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
853 packet->data, packet->len, TRUE);
854 silc_buffer_free(packet);
855 silc_free(id_string);
857 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
859 /* Add the connected router to local server list */
860 server->standalone = FALSE;
861 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
862 SILC_ROUTER, ctx->dest_id, NULL, sock);
865 silc_free(ctx->dest_id);
866 silc_server_disconnect_remote(server, sock, "Server closed connection: "
867 "Authentication failed");
871 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
872 silc_free(sock->user_data);
873 sock->user_data = (void *)id_entry;
874 sock->type = SILC_SOCKET_TYPE_ROUTER;
875 server->id_entry->router = id_entry;
876 server->router = id_entry;
877 idata = (SilcIDListData)sock->user_data;
878 idata->registered = TRUE;
880 /* Perform keepalive. The `hb_context' will be freed automatically
881 when finally calling the silc_socket_free function. XXX hardcoded
883 hb_context = silc_calloc(1, sizeof(*hb_context));
884 hb_context->server = server;
885 silc_socket_set_heartbeat(sock, 600, hb_context,
886 silc_server_perform_heartbeat,
887 server->timeout_queue);
889 /* Register re-key timeout */
890 idata->rekey->timeout = 3600; /* XXX hardcoded */
891 idata->rekey->context = (void *)server;
892 silc_task_register(server->timeout_queue, sock->sock,
893 silc_server_rekey_callback,
894 (void *)sock, idata->rekey->timeout, 0,
895 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
897 /* If we are router then announce our possible servers. */
898 if (server->server_type == SILC_ROUTER)
899 silc_server_announce_servers(server);
901 /* Announce our clients and channels to the router */
902 silc_server_announce_clients(server);
903 silc_server_announce_channels(server);
906 /* Free the temporary connection data context */
908 silc_free(sconn->remote_host);
912 /* Free the protocol object */
913 silc_protocol_free(protocol);
915 silc_packet_context_free(ctx->packet);
917 silc_ske_free(ctx->ske);
919 sock->protocol = NULL;
922 /* Accepts new connections to the server. Accepting new connections are
923 done in three parts to make it async. */
925 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
927 SilcServer server = (SilcServer)context;
928 SilcSocketConnection newsocket;
929 SilcServerKEInternalContext *proto_ctx;
932 SILC_LOG_DEBUG(("Accepting new connection"));
934 server->stat.conn_attempts++;
936 sock = silc_net_accept_connection(server->sock);
938 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
939 server->stat.conn_failures++;
943 /* Check max connections */
944 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
945 SILC_LOG_ERROR(("Refusing connection, server is full"));
946 server->stat.conn_failures++;
950 /* Set socket options */
951 silc_net_set_socket_nonblock(sock);
952 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
954 /* We don't create a ID yet, since we don't know what type of connection
955 this is yet. But, we do add the connection to the socket table. */
956 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
957 server->sockets[sock] = newsocket;
959 /* XXX This MUST be done async as this will block the entire server
960 process. Either we have to do our own resolver stuff or in the future
961 we can use threads. */
962 /* Perform name and address lookups for the remote host. */
963 if (!silc_net_check_host_by_sock(sock, &newsocket->hostname,
965 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
967 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
968 newsocket->hostname ? newsocket->hostname :
969 newsocket->ip ? newsocket->ip : ""));
970 server->stat.conn_failures++;
973 if (!newsocket->hostname)
974 newsocket->hostname = strdup(newsocket->ip);
976 newsocket->port = silc_net_get_remote_port(sock);
978 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
981 /* Allocate internal context for key exchange protocol. This is
982 sent as context for the protocol. */
983 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
984 proto_ctx->server = context;
985 proto_ctx->sock = newsocket;
986 proto_ctx->rng = server->rng;
987 proto_ctx->responder = TRUE;
989 /* Prepare the connection for key exchange protocol. We allocate the
990 protocol but will not start it yet. The connector will be the
991 initiator of the protocol thus we will wait for initiation from
992 there before we start the protocol. */
993 server->stat.auth_attempts++;
994 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
995 &newsocket->protocol, proto_ctx,
996 silc_server_accept_new_connection_second);
998 /* Register a timeout task that will be executed if the connector
999 will not start the key exchange protocol within 60 seconds. For
1000 now, this is a hard coded limit. After 60 secs the connection will
1001 be closed if the key exchange protocol has not been started. */
1002 proto_ctx->timeout_task =
1003 silc_task_register(server->timeout_queue, newsocket->sock,
1004 silc_server_timeout_remote,
1009 /* Register the connection for network input and output. This sets
1010 that scheduler will listen for incoming packets for this connection
1011 and sets that outgoing packets may be sent to this connection as well.
1012 However, this doesn't set the scheduler for outgoing traffic, it
1013 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1014 later when outgoing data is available. */
1015 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1018 /* Second part of accepting new connection. Key exchange protocol has been
1019 performed and now it is time to do little connection authentication
1020 protocol to figure out whether this connection is client or server
1021 and whether it has right to access this server (especially server
1022 connections needs to be authenticated). */
1024 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1026 SilcProtocol protocol = (SilcProtocol)context;
1027 SilcServerKEInternalContext *ctx =
1028 (SilcServerKEInternalContext *)protocol->context;
1029 SilcServer server = (SilcServer)ctx->server;
1030 SilcSocketConnection sock = server->sockets[fd];
1031 SilcServerConnAuthInternalContext *proto_ctx;
1033 SILC_LOG_DEBUG(("Start"));
1035 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1036 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1037 /* Error occured during protocol */
1038 silc_protocol_free(protocol);
1039 sock->protocol = NULL;
1040 silc_ske_free_key_material(ctx->keymat);
1042 silc_packet_context_free(ctx->packet);
1044 silc_ske_free(ctx->ske);
1046 silc_free(ctx->dest_id);
1048 silc_task_unregister_by_callback(server->timeout_queue,
1049 silc_server_failure_callback);
1050 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1051 "Key exchange failed");
1052 server->stat.auth_failures++;
1056 /* We now have the key material as the result of the key exchange
1057 protocol. Take the key material into use. Free the raw key material
1058 as soon as we've set them into use. */
1059 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1060 ctx->ske->prop->cipher,
1061 ctx->ske->prop->pkcs,
1062 ctx->ske->prop->hash,
1063 ctx->ske->prop->hmac,
1064 ctx->ske->prop->group,
1066 silc_protocol_free(protocol);
1067 sock->protocol = NULL;
1068 silc_ske_free_key_material(ctx->keymat);
1070 silc_packet_context_free(ctx->packet);
1072 silc_ske_free(ctx->ske);
1074 silc_free(ctx->dest_id);
1076 silc_task_unregister_by_callback(server->timeout_queue,
1077 silc_server_failure_callback);
1078 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1079 "Key exchange failed");
1080 server->stat.auth_failures++;
1083 silc_ske_free_key_material(ctx->keymat);
1085 /* Allocate internal context for the authentication protocol. This
1086 is sent as context for the protocol. */
1087 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1088 proto_ctx->server = (void *)server;
1089 proto_ctx->sock = sock;
1090 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1091 proto_ctx->responder = TRUE;
1092 proto_ctx->dest_id_type = ctx->dest_id_type;
1093 proto_ctx->dest_id = ctx->dest_id;
1095 /* Free old protocol as it is finished now */
1096 silc_protocol_free(protocol);
1098 silc_packet_context_free(ctx->packet);
1100 sock->protocol = NULL;
1102 /* Allocate the authentication protocol. This is allocated here
1103 but we won't start it yet. We will be receiving party of this
1104 protocol thus we will wait that connecting party will make
1105 their first move. */
1106 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1107 &sock->protocol, proto_ctx,
1108 silc_server_accept_new_connection_final);
1110 /* Register timeout task. If the protocol is not executed inside
1111 this timelimit the connection will be terminated. Currently
1112 this is 60 seconds and is hard coded limit (XXX). */
1113 proto_ctx->timeout_task =
1114 silc_task_register(server->timeout_queue, sock->sock,
1115 silc_server_timeout_remote,
1116 (void *)server, 60, 0,
1121 /* Final part of accepting new connection. The connection has now
1122 been authenticated and keys has been exchanged. We also know whether
1123 this is client or server connection. */
1125 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1127 SilcProtocol protocol = (SilcProtocol)context;
1128 SilcServerConnAuthInternalContext *ctx =
1129 (SilcServerConnAuthInternalContext *)protocol->context;
1130 SilcServer server = (SilcServer)ctx->server;
1131 SilcSocketConnection sock = ctx->sock;
1132 SilcServerHBContext hb_context;
1133 void *id_entry = NULL;
1135 SILC_LOG_DEBUG(("Start"));
1137 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1138 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1139 /* Error occured during protocol */
1140 silc_protocol_free(protocol);
1141 sock->protocol = NULL;
1143 silc_packet_context_free(ctx->packet);
1145 silc_ske_free(ctx->ske);
1147 silc_free(ctx->dest_id);
1150 sock->protocol = NULL;
1151 silc_task_unregister_by_callback(server->timeout_queue,
1152 silc_server_failure_callback);
1153 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1154 "Authentication failed");
1155 server->stat.auth_failures++;
1159 sock->type = ctx->conn_type;
1160 switch(sock->type) {
1161 case SILC_SOCKET_TYPE_CLIENT:
1163 SilcClientEntry client;
1165 SILC_LOG_DEBUG(("Remote host is client"));
1166 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1169 /* Add the client to the client ID cache. The nickname and Client ID
1170 and other information is created after we have received NEW_CLIENT
1171 packet from client. */
1172 client = silc_idlist_add_client(server->local_list,
1173 NULL, 0, NULL, NULL, NULL, NULL, sock);
1175 SILC_LOG_ERROR(("Could not add new client to cache"));
1176 silc_free(sock->user_data);
1181 server->stat.my_clients++;
1182 server->stat.clients++;
1183 if (server->server_type == SILC_ROUTER)
1184 server->stat.cell_clients++;
1186 id_entry = (void *)client;
1189 case SILC_SOCKET_TYPE_SERVER:
1190 case SILC_SOCKET_TYPE_ROUTER:
1192 SilcServerEntry new_server;
1194 SILC_LOG_DEBUG(("Remote host is %s",
1195 sock->type == SILC_SOCKET_TYPE_SERVER ?
1196 "server" : "router"));
1197 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1198 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1199 "server" : "router"));
1201 /* Add the server into server cache. The server name and Server ID
1202 is updated after we have received NEW_SERVER packet from the
1203 server. We mark ourselves as router for this server if we really
1206 silc_idlist_add_server(server->local_list, NULL,
1207 sock->type == SILC_SOCKET_TYPE_SERVER ?
1208 SILC_SERVER : SILC_ROUTER, NULL,
1209 sock->type == SILC_SOCKET_TYPE_SERVER ?
1210 server->id_entry : NULL, sock);
1212 SILC_LOG_ERROR(("Could not add new server to cache"));
1213 silc_free(sock->user_data);
1218 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1219 server->stat.my_servers++;
1221 server->stat.my_routers++;
1222 server->stat.servers++;
1224 id_entry = (void *)new_server;
1226 /* There is connection to other server now, if it is router then
1227 we will have connection to outside world. If we are router but
1228 normal server connected to us then we will remain standalone,
1229 if we are standlone. */
1230 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1231 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1232 server->standalone = FALSE;
1233 if (!server->id_entry->router) {
1234 server->id_entry->router = id_entry;
1235 server->router = id_entry;
1244 /* Add the common data structure to the ID entry. */
1246 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1248 /* Add to sockets internal pointer for fast referencing */
1249 silc_free(sock->user_data);
1250 sock->user_data = id_entry;
1252 /* Connection has been fully established now. Everything is ok. */
1253 SILC_LOG_DEBUG(("New connection authenticated"));
1255 /* Perform keepalive. The `hb_context' will be freed automatically
1256 when finally calling the silc_socket_free function. XXX hardcoded
1258 hb_context = silc_calloc(1, sizeof(*hb_context));
1259 hb_context->server = server;
1260 silc_socket_set_heartbeat(sock, 600, hb_context,
1261 silc_server_perform_heartbeat,
1262 server->timeout_queue);
1264 silc_task_unregister_by_callback(server->timeout_queue,
1265 silc_server_failure_callback);
1266 silc_protocol_free(protocol);
1268 silc_packet_context_free(ctx->packet);
1270 silc_ske_free(ctx->ske);
1272 silc_free(ctx->dest_id);
1274 sock->protocol = NULL;
1277 /* This function is used to read packets from network and send packets to
1278 network. This is usually a generic task. */
1280 SILC_TASK_CALLBACK(silc_server_packet_process)
1282 SilcServer server = (SilcServer)context;
1283 SilcSocketConnection sock = server->sockets[fd];
1284 SilcIDListData idata;
1285 SilcCipher cipher = NULL;
1286 SilcHmac hmac = NULL;
1292 SILC_LOG_DEBUG(("Processing packet"));
1294 /* Packet sending */
1296 if (type == SILC_TASK_WRITE) {
1297 /* Do not send data to disconnected connection */
1298 if (SILC_IS_DISCONNECTED(sock))
1301 server->stat.packets_sent++;
1303 if (sock->outbuf->data - sock->outbuf->head)
1304 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1306 ret = silc_server_packet_send_real(server, sock, TRUE);
1308 /* If returned -2 could not write to connection now, will do
1316 /* The packet has been sent and now it is time to set the connection
1317 back to only for input. When there is again some outgoing data
1318 available for this connection it will be set for output as well.
1319 This call clears the output setting and sets it only for input. */
1320 SILC_SET_CONNECTION_FOR_INPUT(fd);
1321 SILC_UNSET_OUTBUF_PENDING(sock);
1323 silc_buffer_clear(sock->outbuf);
1327 /* Packet receiving */
1329 /* Read some data from connection */
1330 ret = silc_packet_receive(sock);
1336 SILC_LOG_DEBUG(("Read EOF"));
1338 /* If connection is disconnecting already we will finally
1339 close the connection */
1340 if (SILC_IS_DISCONNECTING(sock)) {
1341 if (sock->user_data)
1342 silc_server_free_sock_user_data(server, sock);
1343 silc_server_close_connection(server, sock);
1347 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1348 SILC_SET_DISCONNECTING(sock);
1350 /* If the closed connection was our primary router connection the
1351 start re-connecting phase. */
1352 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1353 sock == server->router->connection)
1354 silc_task_register(server->timeout_queue, 0,
1355 silc_server_connect_to_router,
1358 SILC_TASK_PRI_NORMAL);
1360 if (sock->user_data)
1361 silc_server_free_sock_user_data(server, sock);
1362 silc_server_close_connection(server, sock);
1366 /* If connection is disconnecting or disconnected we will ignore
1368 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1369 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1373 server->stat.packets_received++;
1375 /* Get keys and stuff from ID entry */
1376 idata = (SilcIDListData)sock->user_data;
1378 idata->last_receive = time(NULL);
1379 cipher = idata->receive_key;
1383 /* Process the packet. This will call the parser that will then
1384 decrypt and parse the packet. */
1385 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1389 /* Callback function that the silc_packet_decrypt will call to make the
1390 decision whether the packet is normal or special packet. We will
1391 return TRUE if it is normal and FALSE if it is special */
1393 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1395 SilcPacketContext *packet,
1398 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1399 SilcServer server = (SilcServer)parse_ctx->context;
1401 /* Packet is normal packet, if:
1403 1) packet is private message packet and does not have private key set
1404 2) is other packet than channel message packet
1405 3) is channel message packet and remote is router and we are router
1407 all other packets are special packets
1410 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1411 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1414 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1415 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1416 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1417 server->server_type == SILC_ROUTER))
1423 /* Parses whole packet, received earlier. */
1425 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1427 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1428 SilcServer server = (SilcServer)parse_ctx->context;
1429 SilcSocketConnection sock = parse_ctx->sock;
1430 SilcPacketContext *packet = parse_ctx->packet;
1433 SILC_LOG_DEBUG(("Start"));
1435 /* Decrypt the received packet */
1436 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1437 packet->buffer, packet,
1438 silc_server_packet_decrypt_check, parse_ctx);
1443 /* Parse the packet. Packet type is returned. */
1444 ret = silc_packet_parse(packet);
1446 /* Parse the packet header in special way as this is "special"
1448 ret = silc_packet_parse_special(packet);
1451 if (ret == SILC_PACKET_NONE)
1454 /* Check that the the current client ID is same as in the client's packet. */
1455 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1456 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1457 if (client && client->id) {
1458 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1459 packet->src_id_type);
1460 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1468 if (server->server_type == SILC_ROUTER) {
1469 /* Route the packet if it is not destined to us. Other ID types but
1470 server are handled separately after processing them. */
1471 if (packet->dst_id_type == SILC_ID_SERVER &&
1472 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1473 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1475 /* Route the packet to fastest route for the destination ID */
1476 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1477 packet->dst_id_type);
1480 silc_server_packet_route(server,
1481 silc_server_route_get(server, id,
1482 packet->dst_id_type),
1488 /* Broadcast packet if it is marked as broadcast packet and it is
1489 originated from router and we are router. */
1490 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1491 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1492 silc_server_packet_broadcast(server, server->router->connection, packet);
1496 /* Parse the incoming packet type */
1497 silc_server_packet_parse_type(server, sock, packet);
1500 /* silc_buffer_clear(sock->inbuf); */
1501 silc_packet_context_free(packet);
1502 silc_free(parse_ctx);
1505 /* Parser callback called by silc_packet_receive_process. This merely
1506 registers timeout that will handle the actual parsing when appropriate. */
1508 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1510 SilcServer server = (SilcServer)parser_context->context;
1511 SilcSocketConnection sock = parser_context->sock;
1513 switch (sock->type) {
1514 case SILC_SOCKET_TYPE_UNKNOWN:
1515 /* Parse the packet with timeout */
1516 silc_task_register(server->timeout_queue, sock->sock,
1517 silc_server_packet_parse_real,
1518 (void *)parser_context, 0, 100000,
1520 SILC_TASK_PRI_NORMAL);
1522 case SILC_SOCKET_TYPE_CLIENT:
1523 /* Parse the packet with timeout (unless protocol is active) */
1524 silc_task_register(server->timeout_queue, sock->sock,
1525 silc_server_packet_parse_real,
1526 (void *)parser_context, 0,
1527 (sock->protocol ? 1 : 100000),
1529 SILC_TASK_PRI_NORMAL);
1531 case SILC_SOCKET_TYPE_SERVER:
1532 case SILC_SOCKET_TYPE_ROUTER:
1533 /* Packets from servers are parsed as soon as possible */
1534 silc_task_register(server->timeout_queue, sock->sock,
1535 silc_server_packet_parse_real,
1536 (void *)parser_context, 0, 1,
1538 SILC_TASK_PRI_NORMAL);
1545 /* Parses the packet type and calls what ever routines the packet type
1546 requires. This is done for all incoming packets. */
1548 void silc_server_packet_parse_type(SilcServer server,
1549 SilcSocketConnection sock,
1550 SilcPacketContext *packet)
1552 SilcPacketType type = packet->type;
1554 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1556 /* Parse the packet type */
1558 case SILC_PACKET_DISCONNECT:
1559 SILC_LOG_DEBUG(("Disconnect packet"));
1560 if (packet->flags & SILC_PACKET_FLAG_LIST)
1564 case SILC_PACKET_SUCCESS:
1566 * Success received for something. For now we can have only
1567 * one protocol for connection executing at once hence this
1568 * success message is for whatever protocol is executing currently.
1570 SILC_LOG_DEBUG(("Success packet"));
1571 if (packet->flags & SILC_PACKET_FLAG_LIST)
1573 if (sock->protocol) {
1574 sock->protocol->execute(server->timeout_queue, 0,
1575 sock->protocol, sock->sock, 0, 0);
1579 case SILC_PACKET_FAILURE:
1581 * Failure received for something. For now we can have only
1582 * one protocol for connection executing at once hence this
1583 * failure message is for whatever protocol is executing currently.
1585 SILC_LOG_DEBUG(("Failure packet"));
1586 if (packet->flags & SILC_PACKET_FLAG_LIST)
1588 if (sock->protocol) {
1589 SilcServerFailureContext f;
1590 f = silc_calloc(1, sizeof(*f));
1594 /* We will wait 5 seconds to process this failure packet */
1595 silc_task_register(server->timeout_queue, sock->sock,
1596 silc_server_failure_callback, (void *)f, 5, 0,
1597 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1601 case SILC_PACKET_REJECT:
1602 SILC_LOG_DEBUG(("Reject packet"));
1603 if (packet->flags & SILC_PACKET_FLAG_LIST)
1608 case SILC_PACKET_NOTIFY:
1610 * Received notify packet. Server can receive notify packets from
1611 * router. Server then relays the notify messages to clients if needed.
1613 SILC_LOG_DEBUG(("Notify packet"));
1614 if (packet->flags & SILC_PACKET_FLAG_LIST)
1615 silc_server_notify_list(server, sock, packet);
1617 silc_server_notify(server, sock, packet);
1623 case SILC_PACKET_CHANNEL_MESSAGE:
1625 * Received channel message. Channel messages are special packets
1626 * (although probably most common ones) thus they are handled
1629 SILC_LOG_DEBUG(("Channel Message packet"));
1630 if (packet->flags & SILC_PACKET_FLAG_LIST)
1632 silc_server_channel_message(server, sock, packet);
1635 case SILC_PACKET_CHANNEL_KEY:
1637 * Received key for channel. As channels are created by the router
1638 * the keys are as well. We will distribute the key to all of our
1639 * locally connected clients on the particular channel. Router
1640 * never receives this channel and thus is ignored.
1642 SILC_LOG_DEBUG(("Channel Key packet"));
1643 if (packet->flags & SILC_PACKET_FLAG_LIST)
1645 silc_server_channel_key(server, sock, packet);
1651 case SILC_PACKET_COMMAND:
1653 * Recived command. Processes the command request and allocates the
1654 * command context and calls the command.
1656 SILC_LOG_DEBUG(("Command packet"));
1657 if (packet->flags & SILC_PACKET_FLAG_LIST)
1659 silc_server_command_process(server, sock, packet);
1662 case SILC_PACKET_COMMAND_REPLY:
1664 * Received command reply packet. Received command reply to command. It
1665 * may be reply to command sent by us or reply to command sent by client
1666 * that we've routed further.
1668 SILC_LOG_DEBUG(("Command Reply packet"));
1669 if (packet->flags & SILC_PACKET_FLAG_LIST)
1671 silc_server_command_reply(server, sock, packet);
1675 * Private Message packets
1677 case SILC_PACKET_PRIVATE_MESSAGE:
1679 * Received private message packet. The packet is coming from either
1682 SILC_LOG_DEBUG(("Private Message packet"));
1683 if (packet->flags & SILC_PACKET_FLAG_LIST)
1685 silc_server_private_message(server, sock, packet);
1688 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1690 * Private message key packet.
1692 if (packet->flags & SILC_PACKET_FLAG_LIST)
1694 silc_server_private_message_key(server, sock, packet);
1698 * Key Exchange protocol packets
1700 case SILC_PACKET_KEY_EXCHANGE:
1701 SILC_LOG_DEBUG(("KE packet"));
1702 if (packet->flags & SILC_PACKET_FLAG_LIST)
1705 if (sock->protocol && sock->protocol->protocol &&
1706 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1708 SilcServerKEInternalContext *proto_ctx =
1709 (SilcServerKEInternalContext *)sock->protocol->context;
1711 proto_ctx->packet = silc_packet_context_dup(packet);
1713 /* Let the protocol handle the packet */
1714 sock->protocol->execute(server->timeout_queue, 0,
1715 sock->protocol, sock->sock, 0, 100000);
1717 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1718 "protocol active, packet dropped."));
1720 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1724 case SILC_PACKET_KEY_EXCHANGE_1:
1725 SILC_LOG_DEBUG(("KE 1 packet"));
1726 if (packet->flags & SILC_PACKET_FLAG_LIST)
1729 if (sock->protocol && sock->protocol->protocol &&
1730 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1731 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1733 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1734 SilcServerRekeyInternalContext *proto_ctx =
1735 (SilcServerRekeyInternalContext *)sock->protocol->context;
1737 if (proto_ctx->packet)
1738 silc_packet_context_free(proto_ctx->packet);
1740 proto_ctx->packet = silc_packet_context_dup(packet);
1742 /* Let the protocol handle the packet */
1743 sock->protocol->execute(server->timeout_queue, 0,
1744 sock->protocol, sock->sock, 0, 0);
1746 SilcServerKEInternalContext *proto_ctx =
1747 (SilcServerKEInternalContext *)sock->protocol->context;
1749 if (proto_ctx->packet)
1750 silc_packet_context_free(proto_ctx->packet);
1752 proto_ctx->packet = silc_packet_context_dup(packet);
1753 proto_ctx->dest_id_type = packet->src_id_type;
1754 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1755 packet->src_id_type);
1756 if (!proto_ctx->dest_id)
1759 /* Let the protocol handle the packet */
1760 sock->protocol->execute(server->timeout_queue, 0,
1761 sock->protocol, sock->sock,
1765 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1766 "protocol active, packet dropped."));
1770 case SILC_PACKET_KEY_EXCHANGE_2:
1771 SILC_LOG_DEBUG(("KE 2 packet"));
1772 if (packet->flags & SILC_PACKET_FLAG_LIST)
1775 if (sock->protocol && sock->protocol->protocol &&
1776 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1777 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1779 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1780 SilcServerRekeyInternalContext *proto_ctx =
1781 (SilcServerRekeyInternalContext *)sock->protocol->context;
1783 if (proto_ctx->packet)
1784 silc_packet_context_free(proto_ctx->packet);
1786 proto_ctx->packet = silc_packet_context_dup(packet);
1788 /* Let the protocol handle the packet */
1789 sock->protocol->execute(server->timeout_queue, 0,
1790 sock->protocol, sock->sock, 0, 0);
1792 SilcServerKEInternalContext *proto_ctx =
1793 (SilcServerKEInternalContext *)sock->protocol->context;
1795 if (proto_ctx->packet)
1796 silc_packet_context_free(proto_ctx->packet);
1798 proto_ctx->packet = silc_packet_context_dup(packet);
1799 proto_ctx->dest_id_type = packet->src_id_type;
1800 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1801 packet->src_id_type);
1802 if (!proto_ctx->dest_id)
1805 /* Let the protocol handle the packet */
1806 sock->protocol->execute(server->timeout_queue, 0,
1807 sock->protocol, sock->sock,
1811 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1812 "protocol active, packet dropped."));
1816 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1818 * Connection authentication request packet. When we receive this packet
1819 * we will send to the other end information about our mandatory
1820 * authentication method for the connection. This packet maybe received
1823 SILC_LOG_DEBUG(("Connection authentication request packet"));
1824 if (packet->flags & SILC_PACKET_FLAG_LIST)
1826 silc_server_connection_auth_request(server, sock, packet);
1830 * Connection Authentication protocol packets
1832 case SILC_PACKET_CONNECTION_AUTH:
1833 /* Start of the authentication protocol. We receive here the
1834 authentication data and will verify it. */
1835 SILC_LOG_DEBUG(("Connection auth packet"));
1836 if (packet->flags & SILC_PACKET_FLAG_LIST)
1839 if (sock->protocol && sock->protocol->protocol->type
1840 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1842 SilcServerConnAuthInternalContext *proto_ctx =
1843 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1845 proto_ctx->packet = silc_packet_context_dup(packet);
1847 /* Let the protocol handle the packet */
1848 sock->protocol->execute(server->timeout_queue, 0,
1849 sock->protocol, sock->sock, 0, 0);
1851 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1852 "protocol active, packet dropped."));
1856 case SILC_PACKET_NEW_ID:
1858 * Received New ID packet. This includes some new ID that has been
1859 * created. It may be for client, server or channel. This is the way
1860 * to distribute information about new registered entities in the
1863 SILC_LOG_DEBUG(("New ID packet"));
1864 if (packet->flags & SILC_PACKET_FLAG_LIST)
1865 silc_server_new_id_list(server, sock, packet);
1867 silc_server_new_id(server, sock, packet);
1870 case SILC_PACKET_NEW_CLIENT:
1872 * Received new client packet. This includes client information that
1873 * we will use to create initial client ID. After creating new
1874 * ID we will send it to the client.
1876 SILC_LOG_DEBUG(("New Client packet"));
1877 if (packet->flags & SILC_PACKET_FLAG_LIST)
1879 silc_server_new_client(server, sock, packet);
1882 case SILC_PACKET_NEW_SERVER:
1884 * Received new server packet. This includes Server ID and some other
1885 * information that we may save. This is received after server has
1888 SILC_LOG_DEBUG(("New Server packet"));
1889 if (packet->flags & SILC_PACKET_FLAG_LIST)
1891 silc_server_new_server(server, sock, packet);
1894 case SILC_PACKET_NEW_CHANNEL:
1896 * Received new channel packet. Information about new channel in the
1897 * network are distributed using this packet.
1899 SILC_LOG_DEBUG(("New Channel packet"));
1900 if (packet->flags & SILC_PACKET_FLAG_LIST)
1901 silc_server_new_channel_list(server, sock, packet);
1903 silc_server_new_channel(server, sock, packet);
1906 case SILC_PACKET_HEARTBEAT:
1908 * Received heartbeat.
1910 SILC_LOG_DEBUG(("Heartbeat packet"));
1911 if (packet->flags & SILC_PACKET_FLAG_LIST)
1915 case SILC_PACKET_KEY_AGREEMENT:
1917 * Received heartbeat.
1919 SILC_LOG_DEBUG(("Key agreement packet"));
1920 if (packet->flags & SILC_PACKET_FLAG_LIST)
1922 silc_server_key_agreement(server, sock, packet);
1925 case SILC_PACKET_REKEY:
1927 * Received re-key packet. The sender wants to regenerate the session
1930 SILC_LOG_DEBUG(("Re-key packet"));
1931 if (packet->flags & SILC_PACKET_FLAG_LIST)
1933 silc_server_rekey(server, sock, packet);
1936 case SILC_PACKET_REKEY_DONE:
1938 * The re-key is done.
1940 SILC_LOG_DEBUG(("Re-key done packet"));
1941 if (packet->flags & SILC_PACKET_FLAG_LIST)
1944 if (sock->protocol && sock->protocol->protocol &&
1945 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1947 SilcServerRekeyInternalContext *proto_ctx =
1948 (SilcServerRekeyInternalContext *)sock->protocol->context;
1950 if (proto_ctx->packet)
1951 silc_packet_context_free(proto_ctx->packet);
1953 proto_ctx->packet = silc_packet_context_dup(packet);
1955 /* Let the protocol handle the packet */
1956 sock->protocol->execute(server->timeout_queue, 0,
1957 sock->protocol, sock->sock,
1960 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1961 "protocol active, packet dropped."));
1966 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1972 /* Creates connection to a remote router. */
1974 void silc_server_create_connection(SilcServer server,
1975 char *remote_host, uint32 port)
1977 SilcServerConnection sconn;
1979 /* Allocate connection object for hold connection specific stuff. */
1980 sconn = silc_calloc(1, sizeof(*sconn));
1981 sconn->server = server;
1982 sconn->remote_host = strdup(remote_host);
1983 sconn->remote_port = port;
1985 silc_task_register(server->timeout_queue, 0,
1986 silc_server_connect_router,
1987 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1988 SILC_TASK_PRI_NORMAL);
1991 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1993 silc_socket_free((SilcSocketConnection)context);
1996 /* Closes connection to socket connection */
1998 void silc_server_close_connection(SilcServer server,
1999 SilcSocketConnection sock)
2001 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
2003 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2004 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2005 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2006 "Router"), sock->sock));
2008 /* We won't listen for this connection anymore */
2009 silc_schedule_unset_listen_fd(sock->sock);
2011 /* Unregister all tasks */
2012 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2013 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2015 /* Close the actual connection */
2016 silc_net_close_connection(sock->sock);
2017 server->sockets[sock->sock] = NULL;
2019 silc_task_register(server->timeout_queue, 0,
2020 silc_server_close_connection_final,
2021 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2022 SILC_TASK_PRI_NORMAL);
2025 /* Sends disconnect message to remote connection and disconnects the
2028 void silc_server_disconnect_remote(SilcServer server,
2029 SilcSocketConnection sock,
2030 const char *fmt, ...)
2033 unsigned char buf[4096];
2038 memset(buf, 0, sizeof(buf));
2040 vsprintf(buf, fmt, ap);
2043 SILC_LOG_DEBUG(("Disconnecting remote host"));
2045 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2047 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2048 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2049 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2052 /* Notify remote end that the conversation is over. The notify message
2053 is tried to be sent immediately. */
2054 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2055 buf, strlen(buf), TRUE);
2057 /* Mark the connection to be disconnected */
2058 SILC_SET_DISCONNECTED(sock);
2059 silc_server_close_connection(server, sock);
2064 SilcClientEntry client;
2065 } *FreeClientInternal;
2067 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2069 FreeClientInternal i = (FreeClientInternal)context;
2071 silc_idlist_del_data(i->client);
2072 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2076 /* Frees client data and notifies about client's signoff. */
2078 void silc_server_free_client_data(SilcServer server,
2079 SilcSocketConnection sock,
2080 SilcClientEntry client,
2084 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2086 /* If there is pending outgoing data for the client then purge it
2087 to the network before removing the client entry. */
2088 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2089 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2090 server->stat.packets_sent++;
2092 if (sock->outbuf->data - sock->outbuf->head)
2093 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2095 silc_server_packet_send_real(server, sock, TRUE);
2097 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2098 SILC_UNSET_OUTBUF_PENDING(sock);
2099 silc_buffer_clear(sock->outbuf);
2102 /* Send SIGNOFF notify to routers. */
2103 if (notify && !server->standalone && server->router)
2104 silc_server_send_notify_signoff(server, server->router->connection,
2105 server->server_type == SILC_SERVER ?
2106 FALSE : TRUE, client->id,
2107 SILC_ID_CLIENT_LEN, signoff);
2109 /* Remove client from all channels */
2111 silc_server_remove_from_channels(server, NULL, client,
2112 TRUE, signoff, TRUE);
2114 silc_server_remove_from_channels(server, NULL, client,
2115 FALSE, NULL, FALSE);
2117 /* We will not delete the client entry right away. We will take it
2118 into history (for WHOWAS command) for 5 minutes */
2121 silc_task_register(server->timeout_queue, 0,
2122 silc_server_free_client_data_timeout,
2124 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2125 client->data.registered = FALSE;
2127 /* Free the client entry and everything in it */
2128 server->stat.my_clients--;
2129 server->stat.clients--;
2130 if (server->server_type == SILC_ROUTER)
2131 server->stat.cell_clients--;
2134 /* Frees user_data pointer from socket connection object. This also sends
2135 appropriate notify packets to the network to inform about leaving
2138 void silc_server_free_sock_user_data(SilcServer server,
2139 SilcSocketConnection sock)
2141 SILC_LOG_DEBUG(("Start"));
2143 switch(sock->type) {
2144 case SILC_SOCKET_TYPE_CLIENT:
2146 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2147 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2150 case SILC_SOCKET_TYPE_SERVER:
2151 case SILC_SOCKET_TYPE_ROUTER:
2153 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2155 /* Free all client entries that this server owns as they will
2156 become invalid now as well. */
2157 silc_server_remove_clients_by_server(server, user_data, TRUE);
2159 /* If this was our primary router connection then we're lost to
2160 the outside world. */
2161 if (server->router == user_data) {
2162 server->id_entry->router = NULL;
2163 server->router = NULL;
2164 server->standalone = TRUE;
2167 /* Free the server entry */
2168 silc_idlist_del_data(user_data);
2169 silc_idlist_del_server(server->local_list, user_data);
2170 server->stat.my_servers--;
2171 server->stat.servers--;
2172 if (server->server_type == SILC_ROUTER)
2173 server->stat.cell_servers--;
2178 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2180 silc_idlist_del_data(user_data);
2181 silc_free(user_data);
2186 sock->user_data = NULL;
2189 /* This function is used to remove all client entries by the server `entry'.
2190 This is called when the connection is lost to the server. In this case
2191 we must invalidate all the client entries owned by the server `entry'.
2192 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2193 distributed to our local clients. */
2195 int silc_server_remove_clients_by_server(SilcServer server,
2196 SilcServerEntry entry,
2199 SilcIDCacheList list = NULL;
2200 SilcIDCacheEntry id_cache = NULL;
2201 SilcClientEntry client = NULL;
2203 SilcClientEntry *clients = NULL;
2204 uint32 clients_c = 0;
2205 unsigned char **argv = NULL;
2206 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2209 SILC_LOG_DEBUG(("Start"));
2211 if (server_signoff) {
2212 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2213 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2214 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2215 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2216 argv[argc] = idp->data;
2217 argv_lens[argc] = idp->len;
2218 argv_types[argc] = argc + 1;
2220 silc_buffer_free(idp);
2223 if (silc_idcache_find_by_id(server->local_list->clients,
2224 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2226 if (silc_idcache_list_first(list, &id_cache)) {
2228 client = (SilcClientEntry)id_cache->context;
2229 if (client->data.registered == FALSE) {
2230 if (!silc_idcache_list_next(list, &id_cache))
2236 if (client->router != entry) {
2237 if (server_signoff && client->connection) {
2238 clients = silc_realloc(clients,
2239 sizeof(*clients) * (clients_c + 1));
2240 clients[clients_c] = client;
2244 if (!silc_idcache_list_next(list, &id_cache))
2250 if (server_signoff) {
2251 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2252 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2253 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2255 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2257 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2258 memcpy(argv[argc], idp->data, idp->len);
2259 argv_lens[argc] = idp->len;
2260 argv_types[argc] = argc + 1;
2262 silc_buffer_free(idp);
2265 /* Remove the client entry */
2266 silc_server_remove_from_channels(server, NULL, client, FALSE,
2268 silc_idlist_del_client(server->local_list, client);
2270 if (!silc_idcache_list_next(list, &id_cache))
2274 silc_idcache_list_free(list);
2277 if (silc_idcache_find_by_id(server->global_list->clients,
2278 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2280 if (silc_idcache_list_first(list, &id_cache)) {
2282 client = (SilcClientEntry)id_cache->context;
2283 if (client->data.registered == FALSE) {
2284 if (!silc_idcache_list_next(list, &id_cache))
2290 if (client->router != entry) {
2291 if (server_signoff && client->connection) {
2292 clients = silc_realloc(clients,
2293 sizeof(*clients) * (clients_c + 1));
2294 clients[clients_c] = client;
2298 if (!silc_idcache_list_next(list, &id_cache))
2304 if (server_signoff) {
2305 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2306 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2307 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2309 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2311 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2312 memcpy(argv[argc], idp->data, idp->len);
2313 argv_lens[argc] = idp->len;
2314 argv_types[argc] = argc + 1;
2316 silc_buffer_free(idp);
2319 /* Remove the client entry */
2320 silc_server_remove_from_channels(server, NULL, client, FALSE,
2322 silc_idlist_del_client(server->global_list, client);
2324 if (!silc_idcache_list_next(list, &id_cache))
2328 silc_idcache_list_free(list);
2331 /* Send the SERVER_SIGNOFF notify */
2332 if (server_signoff) {
2335 /* Send SERVER_SIGNOFF notify to our primary router */
2336 if (!server->standalone && server->router) {
2337 args = silc_argument_payload_encode(1, argv, argv_lens,
2339 silc_server_send_notify_args(server,
2340 server->router->connection,
2341 server->server_type ==
2342 SILC_SERVER ? FALSE : TRUE,
2343 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2345 silc_buffer_free(args);
2348 args = silc_argument_payload_encode(argc, argv, argv_lens,
2350 /* Send to local clients */
2351 for (i = 0; i < clients_c; i++) {
2352 silc_server_send_notify_args(server, clients[i]->connection,
2353 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2358 silc_buffer_free(args);
2360 silc_free(argv_lens);
2361 silc_free(argv_types);
2367 /* Checks whether given channel has global users. If it does this returns
2368 TRUE and FALSE if there is only locally connected clients on the channel. */
2370 int silc_server_channel_has_global(SilcChannelEntry channel)
2372 SilcChannelClientEntry chl;
2374 silc_list_start(channel->user_list);
2375 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2376 if (chl->client->router)
2383 /* Checks whether given channel has locally connected users. If it does this
2384 returns TRUE and FALSE if there is not one locally connected client. */
2386 int silc_server_channel_has_local(SilcChannelEntry channel)
2388 SilcChannelClientEntry chl;
2390 silc_list_start(channel->user_list);
2391 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2392 if (!chl->client->router)
2399 /* Removes client from all channels it has joined. This is used when client
2400 connection is disconnected. If the client on a channel is last, the
2401 channel is removed as well. This sends the SIGNOFF notify types. */
2403 void silc_server_remove_from_channels(SilcServer server,
2404 SilcSocketConnection sock,
2405 SilcClientEntry client,
2407 char *signoff_message,
2410 SilcChannelEntry channel;
2411 SilcChannelClientEntry chl;
2414 SILC_LOG_DEBUG(("Start"));
2416 if (!client || !client->id)
2419 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2421 /* Remove the client from all channels. The client is removed from
2422 the channels' user list. */
2423 silc_list_start(client->channels);
2424 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2425 channel = chl->channel;
2427 /* Remove channel from client's channel list */
2428 silc_list_del(client->channels, chl);
2430 /* Remove channel if there is no users anymore */
2431 if (server->server_type == SILC_ROUTER &&
2432 silc_list_count(channel->user_list) < 2) {
2433 server->stat.my_channels--;
2436 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2438 if (channel->founder_key) {
2439 /* The founder auth data exists, do not remove the channel entry */
2440 SilcChannelClientEntry chl2;
2444 silc_list_start(channel->user_list);
2445 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2446 silc_list_del(chl2->client->channels, chl2);
2447 silc_list_del(channel->user_list, chl2);
2453 if (!silc_idlist_del_channel(server->local_list, channel))
2454 silc_idlist_del_channel(server->global_list, channel);
2458 /* Remove client from channel's client list */
2459 silc_list_del(channel->user_list, chl);
2461 server->stat.my_chanclients--;
2463 /* If there is no global users on the channel anymore mark the channel
2464 as local channel. */
2465 if (server->server_type == SILC_SERVER &&
2466 !silc_server_channel_has_global(channel))
2467 channel->global_users = FALSE;
2469 /* If there is not at least one local user on the channel then we don't
2470 need the channel entry anymore, we can remove it safely. */
2471 if (server->server_type == SILC_SERVER &&
2472 !silc_server_channel_has_local(channel)) {
2473 /* Notify about leaving client if this channel has global users. */
2474 if (notify && channel->global_users)
2475 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2476 SILC_NOTIFY_TYPE_SIGNOFF,
2477 signoff_message ? 2 : 1,
2478 clidp->data, clidp->len,
2479 signoff_message, signoff_message ?
2480 strlen(signoff_message) : 0);
2482 server->stat.my_channels--;
2485 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2487 if (channel->founder_key) {
2488 /* The founder auth data exists, do not remove the channel entry */
2489 SilcChannelClientEntry chl2;
2493 silc_list_start(channel->user_list);
2494 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2495 silc_list_del(chl2->client->channels, chl2);
2496 silc_list_del(channel->user_list, chl2);
2502 if (!silc_idlist_del_channel(server->local_list, channel))
2503 silc_idlist_del_channel(server->global_list, channel);
2507 /* Send notify to channel about client leaving SILC and thus
2508 the entire channel. */
2510 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2511 SILC_NOTIFY_TYPE_SIGNOFF,
2512 signoff_message ? 2 : 1,
2513 clidp->data, clidp->len,
2514 signoff_message, signoff_message ?
2515 strlen(signoff_message) : 0);
2517 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2518 /* Re-generate channel key */
2519 silc_server_create_channel_key(server, channel, 0);
2521 /* Send the channel key to the channel. The key of course is not sent
2522 to the client who was removed from the channel. */
2523 silc_server_send_channel_key(server, client->connection, channel,
2524 server->server_type == SILC_ROUTER ?
2525 FALSE : !server->standalone);
2529 silc_buffer_free(clidp);
2532 /* Removes client from one channel. This is used for example when client
2533 calls LEAVE command to remove itself from the channel. Returns TRUE
2534 if channel still exists and FALSE if the channel is removed when
2535 last client leaves the channel. If `notify' is FALSE notify messages
2538 int silc_server_remove_from_one_channel(SilcServer server,
2539 SilcSocketConnection sock,
2540 SilcChannelEntry channel,
2541 SilcClientEntry client,
2544 SilcChannelEntry ch;
2545 SilcChannelClientEntry chl;
2548 SILC_LOG_DEBUG(("Start"));
2550 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2552 /* Remove the client from the channel. The client is removed from
2553 the channel's user list. */
2554 silc_list_start(client->channels);
2555 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2556 if (chl->channel != channel)
2561 /* Remove channel from client's channel list */
2562 silc_list_del(client->channels, chl);
2564 /* Remove channel if there is no users anymore */
2565 if (server->server_type == SILC_ROUTER &&
2566 silc_list_count(channel->user_list) < 2) {
2568 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2569 if (!silc_idlist_del_channel(server->local_list, channel))
2570 silc_idlist_del_channel(server->global_list, channel);
2571 silc_buffer_free(clidp);
2572 server->stat.my_channels--;
2576 /* Remove client from channel's client list */
2577 silc_list_del(channel->user_list, chl);
2579 server->stat.my_chanclients--;
2581 /* If there is no global users on the channel anymore mark the channel
2582 as local channel. */
2583 if (server->server_type == SILC_SERVER &&
2584 !silc_server_channel_has_global(channel))
2585 channel->global_users = FALSE;
2587 /* If there is not at least one local user on the channel then we don't
2588 need the channel entry anymore, we can remove it safely. */
2589 if (server->server_type == SILC_SERVER &&
2590 !silc_server_channel_has_local(channel)) {
2591 /* Notify about leaving client if this channel has global users. */
2592 if (notify && channel->global_users)
2593 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2594 SILC_NOTIFY_TYPE_LEAVE, 1,
2595 clidp->data, clidp->len);
2597 server->stat.my_channels--;
2598 silc_buffer_free(clidp);
2601 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2603 if (channel->founder_key) {
2604 /* The founder auth data exists, do not remove the channel entry */
2605 SilcChannelClientEntry chl2;
2609 silc_list_start(channel->user_list);
2610 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2611 silc_list_del(chl2->client->channels, chl2);
2612 silc_list_del(channel->user_list, chl2);
2618 if (!silc_idlist_del_channel(server->local_list, channel))
2619 silc_idlist_del_channel(server->global_list, channel);
2623 /* Send notify to channel about client leaving the channel */
2625 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2626 SILC_NOTIFY_TYPE_LEAVE, 1,
2627 clidp->data, clidp->len);
2631 silc_buffer_free(clidp);
2635 /* Returns TRUE if the given client is on the channel. FALSE if not.
2636 This works because we assure that the user list on the channel is
2637 always in up to date thus we can only check the channel list from
2638 `client' which is faster than checking the user list from `channel'. */
2640 int silc_server_client_on_channel(SilcClientEntry client,
2641 SilcChannelEntry channel)
2643 SilcChannelClientEntry chl;
2645 if (!client || !channel)
2648 silc_list_start(client->channels);
2649 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2650 if (chl->channel == channel)
2656 /* Timeout callback. This is called if connection is idle or for some
2657 other reason is not responding within some period of time. This
2658 disconnects the remote end. */
2660 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2662 SilcServer server = (SilcServer)context;
2663 SilcSocketConnection sock = server->sockets[fd];
2668 if (sock->user_data)
2669 silc_server_free_sock_user_data(server, sock);
2671 silc_server_disconnect_remote(server, sock,
2672 "Server closed connection: "
2673 "Connection timeout");
2676 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2677 function may be used only by router. In real SILC network all channels
2678 are created by routers thus this function is never used by normal
2681 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2682 SilcServerID *router_id,
2688 SilcChannelID *channel_id;
2689 SilcChannelEntry entry;
2693 SILC_LOG_DEBUG(("Creating new channel"));
2696 cipher = "aes-256-cbc";
2698 hmac = "hmac-sha1-96";
2700 /* Allocate cipher */
2701 if (!silc_cipher_alloc(cipher, &key))
2705 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2706 silc_cipher_free(key);
2710 channel_name = strdup(channel_name);
2712 /* Create the channel */
2713 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2714 entry = silc_idlist_add_channel(server->local_list, channel_name,
2715 SILC_CHANNEL_MODE_NONE, channel_id,
2716 NULL, key, newhmac);
2718 silc_free(channel_name);
2722 entry->cipher = strdup(cipher);
2723 entry->hmac_name = strdup(hmac);
2725 /* Now create the actual key material */
2726 silc_server_create_channel_key(server, entry,
2727 silc_cipher_get_key_len(key) / 8);
2729 /* Notify other routers about the new channel. We send the packet
2730 to our primary route. */
2731 if (broadcast && server->standalone == FALSE)
2732 silc_server_send_new_channel(server, server->router->connection, TRUE,
2733 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2736 server->stat.my_channels++;
2741 /* Same as above but creates the channel with Channel ID `channel_id. */
2744 silc_server_create_new_channel_with_id(SilcServer server,
2748 SilcChannelID *channel_id,
2751 SilcChannelEntry entry;
2755 SILC_LOG_DEBUG(("Creating new channel"));
2758 cipher = "aes-256-cbc";
2760 hmac = "hmac-sha1-96";
2762 /* Allocate cipher */
2763 if (!silc_cipher_alloc(cipher, &key))
2767 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2768 silc_cipher_free(key);
2772 channel_name = strdup(channel_name);
2774 /* Create the channel */
2775 entry = silc_idlist_add_channel(server->local_list, channel_name,
2776 SILC_CHANNEL_MODE_NONE, channel_id,
2777 NULL, key, newhmac);
2779 silc_free(channel_name);
2783 /* Now create the actual key material */
2784 silc_server_create_channel_key(server, entry,
2785 silc_cipher_get_key_len(key) / 8);
2787 /* Notify other routers about the new channel. We send the packet
2788 to our primary route. */
2789 if (broadcast && server->standalone == FALSE)
2790 silc_server_send_new_channel(server, server->router->connection, TRUE,
2791 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2794 server->stat.my_channels++;
2799 /* Channel's key re-key timeout callback. */
2801 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2803 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2804 SilcServer server = (SilcServer)rekey->context;
2806 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2807 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2809 silc_task_register(server->timeout_queue, 0,
2810 silc_server_channel_key_rekey,
2811 (void *)rekey, 3600, 0,
2813 SILC_TASK_PRI_NORMAL);
2816 /* Generates new channel key. This is used to create the initial channel key
2817 but also to re-generate new key for channel. If `key_len' is provided
2818 it is the bytes of the key length. */
2820 void silc_server_create_channel_key(SilcServer server,
2821 SilcChannelEntry channel,
2825 unsigned char channel_key[32], hash[32];
2828 SILC_LOG_DEBUG(("Generating channel key"));
2830 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2831 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2835 if (!channel->channel_key)
2836 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2841 else if (channel->key_len)
2842 len = channel->key_len / 8;
2844 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2846 /* Create channel key */
2847 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2850 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2852 /* Remove old key if exists */
2854 memset(channel->key, 0, channel->key_len / 8);
2855 silc_free(channel->key);
2859 channel->key_len = len * 8;
2860 channel->key = silc_calloc(len, sizeof(*channel->key));
2861 memcpy(channel->key, channel_key, len);
2862 memset(channel_key, 0, sizeof(channel_key));
2864 /* Generate HMAC key from the channel key data and set it */
2866 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2867 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2868 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2869 memset(hash, 0, sizeof(hash));
2871 if (server->server_type == SILC_ROUTER) {
2872 if (!channel->rekey)
2873 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2874 channel->rekey->context = (void *)server;
2875 channel->rekey->channel = channel;
2876 channel->rekey->key_len = key_len;
2878 silc_task_unregister_by_callback(server->timeout_queue,
2879 silc_server_channel_key_rekey);
2880 silc_task_register(server->timeout_queue, 0,
2881 silc_server_channel_key_rekey,
2882 (void *)channel->rekey, 3600, 0,
2884 SILC_TASK_PRI_NORMAL);
2888 /* Saves the channel key found in the encoded `key_payload' buffer. This
2889 function is used when we receive Channel Key Payload and also when we're
2890 processing JOIN command reply. Returns entry to the channel. */
2892 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2893 SilcBuffer key_payload,
2894 SilcChannelEntry channel)
2896 SilcChannelKeyPayload payload = NULL;
2897 SilcChannelID *id = NULL;
2898 unsigned char *tmp, hash[32];
2902 SILC_LOG_DEBUG(("Start"));
2904 /* Decode channel key payload */
2905 payload = silc_channel_key_payload_parse(key_payload);
2907 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2912 /* Get the channel entry */
2915 /* Get channel ID */
2916 tmp = silc_channel_key_get_id(payload, &tmp_len);
2917 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2923 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2925 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2927 SILC_LOG_ERROR(("Received key for non-existent channel"));
2933 tmp = silc_channel_key_get_key(payload, &tmp_len);
2939 cipher = silc_channel_key_get_cipher(payload, NULL);
2945 /* Remove old key if exists */
2947 memset(channel->key, 0, channel->key_len / 8);
2948 silc_free(channel->key);
2949 silc_cipher_free(channel->channel_key);
2952 /* Create new cipher */
2953 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2958 if (channel->cipher)
2959 silc_free(channel->cipher);
2960 channel->cipher = strdup(cipher);
2963 channel->key_len = tmp_len * 8;
2964 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2965 memcpy(channel->key, tmp, tmp_len);
2966 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2968 /* Generate HMAC key from the channel key data and set it */
2970 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2971 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2972 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2974 memset(hash, 0, sizeof(hash));
2975 memset(tmp, 0, tmp_len);
2977 if (server->server_type == SILC_ROUTER) {
2978 if (!channel->rekey)
2979 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2980 channel->rekey->context = (void *)server;
2981 channel->rekey->channel = channel;
2983 silc_task_unregister_by_callback(server->timeout_queue,
2984 silc_server_channel_key_rekey);
2985 silc_task_register(server->timeout_queue, 0,
2986 silc_server_channel_key_rekey,
2987 (void *)channel->rekey, 3600, 0,
2989 SILC_TASK_PRI_NORMAL);
2996 silc_channel_key_payload_free(payload);
3001 /* Heartbeat callback. This function is set as argument for the
3002 silc_socket_set_heartbeat function. The library will call this function
3003 at the set time interval. */
3005 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3008 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3010 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3013 /* Send the heartbeat */
3014 silc_server_send_heartbeat(hb->server, sock);
3017 /* Returns assembled of all servers in the given ID list. The packet's
3018 form is dictated by the New ID payload. */
3020 static void silc_server_announce_get_servers(SilcServer server,
3022 SilcBuffer *servers)
3024 SilcIDCacheList list;
3025 SilcIDCacheEntry id_cache;
3026 SilcServerEntry entry;
3029 /* Go through all clients in the list */
3030 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3031 SILC_ID_SERVER, &list)) {
3032 if (silc_idcache_list_first(list, &id_cache)) {
3034 entry = (SilcServerEntry)id_cache->context;
3036 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3038 *servers = silc_buffer_realloc(*servers,
3040 (*servers)->truelen + idp->len :
3042 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3043 silc_buffer_put(*servers, idp->data, idp->len);
3044 silc_buffer_pull(*servers, idp->len);
3045 silc_buffer_free(idp);
3047 if (!silc_idcache_list_next(list, &id_cache))
3052 silc_idcache_list_free(list);
3056 /* This function is used by router to announce existing servers to our
3057 primary router when we've connected to it. */
3059 void silc_server_announce_servers(SilcServer server)
3061 SilcBuffer servers = NULL;
3063 SILC_LOG_DEBUG(("Announcing servers"));
3065 /* Get servers in local list */
3066 silc_server_announce_get_servers(server, server->local_list, &servers);
3068 /* Get servers in global list */
3069 silc_server_announce_get_servers(server, server->global_list, &servers);
3072 silc_buffer_push(servers, servers->data - servers->head);
3073 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3075 /* Send the packet */
3076 silc_server_packet_send(server, server->router->connection,
3077 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3078 servers->data, servers->len, TRUE);
3080 silc_buffer_free(servers);
3084 /* Returns assembled packet of all clients in the given ID list. The
3085 packet's form is dictated by the New ID Payload. */
3087 static void silc_server_announce_get_clients(SilcServer server,
3089 SilcBuffer *clients)
3091 SilcIDCacheList list;
3092 SilcIDCacheEntry id_cache;
3093 SilcClientEntry client;
3096 /* Go through all clients in the list */
3097 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3098 SILC_ID_CLIENT, &list)) {
3099 if (silc_idcache_list_first(list, &id_cache)) {
3101 client = (SilcClientEntry)id_cache->context;
3103 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3105 *clients = silc_buffer_realloc(*clients,
3107 (*clients)->truelen + idp->len :
3109 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3110 silc_buffer_put(*clients, idp->data, idp->len);
3111 silc_buffer_pull(*clients, idp->len);
3112 silc_buffer_free(idp);
3114 if (!silc_idcache_list_next(list, &id_cache))
3119 silc_idcache_list_free(list);
3123 /* This function is used to announce our existing clients to our router
3124 when we've connected to it. */
3126 void silc_server_announce_clients(SilcServer server)
3128 SilcBuffer clients = NULL;
3130 SILC_LOG_DEBUG(("Announcing clients"));
3132 /* Get clients in local list */
3133 silc_server_announce_get_clients(server, server->local_list,
3136 /* As router we announce our global list as well */
3137 if (server->server_type == SILC_ROUTER)
3138 silc_server_announce_get_clients(server, server->global_list,
3142 silc_buffer_push(clients, clients->data - clients->head);
3143 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3145 /* Send the packet */
3146 silc_server_packet_send(server, server->router->connection,
3147 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3148 clients->data, clients->len, TRUE);
3150 silc_buffer_free(clients);
3155 silc_server_announce_encode_join(uint32 argc, ...)
3160 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3163 /* Returns assembled packets for channel users of the `channel'. */
3165 void silc_server_announce_get_channel_users(SilcServer server,
3166 SilcChannelEntry channel,
3167 SilcBuffer *channel_users)
3169 SilcChannelClientEntry chl;
3170 SilcBuffer chidp, clidp;
3174 SILC_LOG_DEBUG(("Start"));
3176 /* Now find all users on the channel */
3177 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3178 silc_list_start(channel->user_list);
3179 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3180 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3181 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3182 chidp->data, chidp->len);
3185 silc_buffer_realloc(*channel_users,
3187 (*channel_users)->truelen + len : len));
3188 silc_buffer_pull_tail(*channel_users,
3189 ((*channel_users)->end -
3190 (*channel_users)->data));
3192 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3193 silc_buffer_pull(*channel_users, len);
3194 silc_buffer_free(clidp);
3195 silc_buffer_free(tmp);
3197 silc_buffer_free(chidp);
3200 /* Returns assembled packets for all channels and users on those channels
3201 from the given ID List. The packets are in the form dictated by the
3202 New Channel and New Channel User payloads. */
3204 void silc_server_announce_get_channels(SilcServer server,
3206 SilcBuffer *channels,
3207 SilcBuffer *channel_users)
3209 SilcIDCacheList list;
3210 SilcIDCacheEntry id_cache;
3211 SilcChannelEntry channel;
3216 SILC_LOG_DEBUG(("Start"));
3218 /* Go through all channels in the list */
3219 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3220 SILC_ID_CHANNEL, &list)) {
3221 if (silc_idcache_list_first(list, &id_cache)) {
3223 channel = (SilcChannelEntry)id_cache->context;
3225 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3226 name_len = strlen(channel->channel_name);
3228 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3230 silc_buffer_realloc(*channels,
3231 (*channels ? (*channels)->truelen + len : len));
3232 silc_buffer_pull_tail(*channels,
3233 ((*channels)->end - (*channels)->data));
3234 silc_buffer_format(*channels,
3235 SILC_STR_UI_SHORT(name_len),
3236 SILC_STR_UI_XNSTRING(channel->channel_name,
3238 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3239 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3240 SILC_STR_UI_INT(channel->mode),
3242 silc_buffer_pull(*channels, len);
3244 silc_server_announce_get_channel_users(server, channel,
3249 if (!silc_idcache_list_next(list, &id_cache))
3254 silc_idcache_list_free(list);
3258 /* This function is used to announce our existing channels to our router
3259 when we've connected to it. This also announces the users on the
3260 channels to the router. */
3262 void silc_server_announce_channels(SilcServer server)
3264 SilcBuffer channels = NULL, channel_users = NULL;
3266 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3268 /* Get channels and channel users in local list */
3269 silc_server_announce_get_channels(server, server->local_list,
3270 &channels, &channel_users);
3272 /* Get channels and channel users in global list */
3273 silc_server_announce_get_channels(server, server->global_list,
3274 &channels, &channel_users);
3277 silc_buffer_push(channels, channels->data - channels->head);
3278 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3280 /* Send the packet */
3281 silc_server_packet_send(server, server->router->connection,
3282 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3283 channels->data, channels->len,
3286 silc_buffer_free(channels);
3289 if (channel_users) {
3290 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3291 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3292 channel_users->len);
3294 /* Send the packet */
3295 silc_server_packet_send(server, server->router->connection,
3296 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3297 channel_users->data, channel_users->len,
3300 silc_buffer_free(channel_users);
3304 /* Failure timeout callback. If this is called then we will immediately
3305 process the received failure. We always process the failure with timeout
3306 since we do not want to blindly trust to received failure packets.
3307 This won't be called (the timeout is cancelled) if the failure was
3308 bogus (it is bogus if remote does not close the connection after sending
3311 SILC_TASK_CALLBACK(silc_server_failure_callback)
3313 SilcServerFailureContext f = (SilcServerFailureContext)context;
3315 if (f->sock->protocol) {
3316 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3317 f->sock->protocol->execute(f->server->timeout_queue, 0,
3318 f->sock->protocol, f->sock->sock, 0, 0);
3324 /* Assembles user list and users mode list from the `channel'. */
3326 void silc_server_get_users_on_channel(SilcServer server,
3327 SilcChannelEntry channel,
3328 SilcBuffer *user_list,
3329 SilcBuffer *mode_list,
3332 SilcChannelClientEntry chl;
3333 SilcBuffer client_id_list;
3334 SilcBuffer client_mode_list;
3336 uint32 list_count = 0;
3338 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3339 silc_list_count(channel->user_list));
3340 client_mode_list = silc_buffer_alloc(4 *
3341 silc_list_count(channel->user_list));
3342 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3343 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3344 silc_list_start(channel->user_list);
3345 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3347 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3348 silc_buffer_put(client_id_list, idp->data, idp->len);
3349 silc_buffer_pull(client_id_list, idp->len);
3350 silc_buffer_free(idp);
3352 /* Client's mode on channel */
3353 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3354 silc_buffer_pull(client_mode_list, 4);
3358 silc_buffer_push(client_id_list,
3359 client_id_list->data - client_id_list->head);
3360 silc_buffer_push(client_mode_list,
3361 client_mode_list->data - client_mode_list->head);
3363 *user_list = client_id_list;
3364 *mode_list = client_mode_list;
3365 *user_count = list_count;
3368 /* Saves users and their modes to the `channel'. */
3370 void silc_server_save_users_on_channel(SilcServer server,
3371 SilcSocketConnection sock,
3372 SilcChannelEntry channel,
3373 SilcClientID *noadd,
3374 SilcBuffer user_list,
3375 SilcBuffer mode_list,
3380 /* Cache the received Client ID's and modes. This cache expires
3381 whenever server sends notify message to channel. It means two things;
3382 some user has joined or leaved the channel. XXX TODO! */
3383 for (i = 0; i < user_count; i++) {
3386 SilcClientID *client_id;
3387 SilcClientEntry client;
3390 SILC_GET16_MSB(idp_len, user_list->data + 2);
3392 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3393 silc_buffer_pull(user_list, idp_len);
3398 SILC_GET32_MSB(mode, mode_list->data);
3399 silc_buffer_pull(mode_list, 4);
3401 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3402 silc_free(client_id);
3406 /* Check if we have this client cached already. */
3407 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3410 client = silc_idlist_find_client_by_id(server->global_list,
3413 /* If router did not find such Client ID in its lists then this must
3414 be bogus client or some router in the net is buggy. */
3415 if (server->server_type == SILC_ROUTER) {
3416 silc_free(client_id);
3420 /* We don't have that client anywhere, add it. The client is added
3421 to global list since server didn't have it in the lists so it must be
3423 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3425 silc_id_dup(client_id, SILC_ID_CLIENT),
3426 sock->user_data, NULL);
3428 silc_free(client_id);
3432 client->data.registered = TRUE;
3435 silc_free(client_id);
3437 if (!silc_server_client_on_channel(client, channel)) {
3438 /* Client was not on the channel, add it. */
3439 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3440 chl->client = client;
3442 chl->channel = channel;
3443 silc_list_add(channel->user_list, chl);
3444 silc_list_add(client->channels, chl);
3449 /* Lookups route to the client indicated by the `id_data'. The connection
3450 object and internal data object is returned. Returns NULL if route
3451 could not be found to the client. If the `client_id' is specified then
3452 it is used and the `id_data' is ignored. */
3454 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3455 unsigned char *id_data,
3457 SilcClientID *client_id,
3458 SilcIDListData *idata)
3461 SilcClientEntry client;
3463 SILC_LOG_DEBUG(("Start"));
3465 /* Decode destination Client ID */
3467 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3469 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3473 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3476 /* If the destination belongs to our server we don't have to route
3477 the packet anywhere but to send it to the local destination. */
3478 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3482 if (client && client->data.registered == FALSE)
3485 /* If we are router and the client has router then the client is in
3486 our cell but not directly connected to us. */
3487 if (server->server_type == SILC_ROUTER && client->router) {
3488 /* We are of course in this case the client's router thus the real
3489 "router" of the client is the server who owns the client. Thus
3490 we will send the packet to that server. */
3492 *idata = (SilcIDListData)client->router;
3493 return client->router->connection;
3496 /* Seems that client really is directly connected to us */
3498 *idata = (SilcIDListData)client;
3499 return client->connection;
3502 /* Destination belongs to someone not in this server. If we are normal
3503 server our action is to send the packet to our router. */
3504 if (server->server_type == SILC_SERVER && !server->standalone) {
3507 *idata = (SilcIDListData)server->router;
3508 return server->router->connection;
3511 /* We are router and we will perform route lookup for the destination
3512 and send the packet to fastest route. */
3513 if (server->server_type == SILC_ROUTER && !server->standalone) {
3514 /* Check first that the ID is valid */
3515 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3517 SilcSocketConnection dst_sock;
3519 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3523 *idata = (SilcIDListData)dst_sock->user_data;
3532 /* Encodes and returns channel list of channels the `client' has joined.
3533 Secret channels are not put to the list. */
3535 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3536 SilcClientEntry client)
3538 SilcBuffer buffer = NULL;
3539 SilcChannelEntry channel;
3540 SilcChannelClientEntry chl;
3545 silc_list_start(client->channels);
3546 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3547 channel = chl->channel;
3549 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3552 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3553 name_len = strlen(channel->channel_name);
3555 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3556 buffer = silc_buffer_realloc(buffer,
3557 (buffer ? (buffer)->truelen + len : len));
3558 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3559 silc_buffer_format(buffer,
3560 SILC_STR_UI_SHORT(name_len),
3561 SILC_STR_UI_XNSTRING(channel->channel_name,
3563 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3564 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3565 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3567 silc_buffer_pull(buffer, len);
3572 silc_buffer_push(buffer, buffer->data - buffer->head);
3577 /* Finds client entry by Client ID and if it is not found then resolves
3578 it using WHOIS command. */
3580 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3581 SilcClientID *client_id)
3583 SilcClientEntry client;
3585 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3587 client = silc_idlist_find_client_by_id(server->global_list,
3589 if (!client && server->server_type == SILC_ROUTER)
3593 if (!client && server->standalone)
3596 if (!client || !client->nickname || !client->username) {
3597 SilcBuffer buffer, idp;
3599 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3600 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3601 ++server->cmd_ident, 1,
3602 3, idp->data, idp->len);
3603 silc_server_packet_send(server, client ? client->router->connection :
3604 server->router->connection,
3605 SILC_PACKET_COMMAND, 0,
3606 buffer->data, buffer->len, FALSE);
3607 silc_buffer_free(idp);
3608 silc_buffer_free(buffer);
3614 /* A timeout callback for the re-key. We will be the initiator of the
3617 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3619 SilcSocketConnection sock = (SilcSocketConnection)context;
3620 SilcIDListData idata = (SilcIDListData)sock->user_data;
3621 SilcServer server = (SilcServer)idata->rekey->context;
3622 SilcProtocol protocol;
3623 SilcServerRekeyInternalContext *proto_ctx;
3625 SILC_LOG_DEBUG(("Start"));
3627 /* Allocate internal protocol context. This is sent as context
3629 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3630 proto_ctx->server = (void *)server;
3631 proto_ctx->sock = sock;
3632 proto_ctx->responder = FALSE;
3633 proto_ctx->pfs = idata->rekey->pfs;
3635 /* Perform rekey protocol. Will call the final callback after the
3636 protocol is over. */
3637 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3638 &protocol, proto_ctx, silc_server_rekey_final);
3639 sock->protocol = protocol;
3641 /* Run the protocol */
3642 protocol->execute(server->timeout_queue, 0, protocol,
3645 /* Re-register re-key timeout */
3646 silc_task_register(server->timeout_queue, sock->sock,
3647 silc_server_rekey_callback,
3648 context, idata->rekey->timeout, 0,
3649 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3652 /* The final callback for the REKEY protocol. This will actually take the
3653 new key material into use. */
3655 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3657 SilcProtocol protocol = (SilcProtocol)context;
3658 SilcServerRekeyInternalContext *ctx =
3659 (SilcServerRekeyInternalContext *)protocol->context;
3660 SilcServer server = (SilcServer)ctx->server;
3661 SilcSocketConnection sock = ctx->sock;
3663 SILC_LOG_DEBUG(("Start"));
3665 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3666 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3667 /* Error occured during protocol */
3668 silc_protocol_cancel(server->timeout_queue, protocol);
3669 silc_protocol_free(protocol);
3670 sock->protocol = NULL;
3672 silc_packet_context_free(ctx->packet);
3674 silc_ske_free(ctx->ske);
3679 /* Take the keys into use */
3680 if (ctx->pfs == TRUE)
3681 silc_server_protocol_rekey_generate_pfs(server, ctx);
3683 silc_server_protocol_rekey_generate(server, ctx);
3686 silc_protocol_free(protocol);
3687 sock->protocol = NULL;
3689 silc_packet_context_free(ctx->packet);
3691 silc_ske_free(ctx->ske);