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 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
964 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
966 SILC_LOG_ERROR(("IP/DNS lookup failed"));
967 server->stat.conn_failures++;
970 if (!newsocket->hostname)
971 newsocket->hostname = strdup(newsocket->ip);
972 newsocket->port = silc_net_get_remote_port(sock);
974 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
977 /* Allocate internal context for key exchange protocol. This is
978 sent as context for the protocol. */
979 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
980 proto_ctx->server = context;
981 proto_ctx->sock = newsocket;
982 proto_ctx->rng = server->rng;
983 proto_ctx->responder = TRUE;
985 /* Prepare the connection for key exchange protocol. We allocate the
986 protocol but will not start it yet. The connector will be the
987 initiator of the protocol thus we will wait for initiation from
988 there before we start the protocol. */
989 server->stat.auth_attempts++;
990 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
991 &newsocket->protocol, proto_ctx,
992 silc_server_accept_new_connection_second);
994 /* Register a timeout task that will be executed if the connector
995 will not start the key exchange protocol within 60 seconds. For
996 now, this is a hard coded limit. After 60 secs the connection will
997 be closed if the key exchange protocol has not been started. */
998 proto_ctx->timeout_task =
999 silc_task_register(server->timeout_queue, newsocket->sock,
1000 silc_server_timeout_remote,
1005 /* Register the connection for network input and output. This sets
1006 that scheduler will listen for incoming packets for this connection
1007 and sets that outgoing packets may be sent to this connection as well.
1008 However, this doesn't set the scheduler for outgoing traffic, it
1009 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
1010 later when outgoing data is available. */
1011 SILC_REGISTER_CONNECTION_FOR_IO(sock);
1014 /* Second part of accepting new connection. Key exchange protocol has been
1015 performed and now it is time to do little connection authentication
1016 protocol to figure out whether this connection is client or server
1017 and whether it has right to access this server (especially server
1018 connections needs to be authenticated). */
1020 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1022 SilcProtocol protocol = (SilcProtocol)context;
1023 SilcServerKEInternalContext *ctx =
1024 (SilcServerKEInternalContext *)protocol->context;
1025 SilcServer server = (SilcServer)ctx->server;
1026 SilcSocketConnection sock = server->sockets[fd];
1027 SilcServerConnAuthInternalContext *proto_ctx;
1029 SILC_LOG_DEBUG(("Start"));
1031 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1032 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1033 /* Error occured during protocol */
1034 silc_protocol_free(protocol);
1035 sock->protocol = NULL;
1036 silc_ske_free_key_material(ctx->keymat);
1038 silc_packet_context_free(ctx->packet);
1040 silc_ske_free(ctx->ske);
1042 silc_free(ctx->dest_id);
1044 silc_task_unregister_by_callback(server->timeout_queue,
1045 silc_server_failure_callback);
1046 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1047 "Key exchange failed");
1048 server->stat.auth_failures++;
1052 /* We now have the key material as the result of the key exchange
1053 protocol. Take the key material into use. Free the raw key material
1054 as soon as we've set them into use. */
1055 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1056 ctx->ske->prop->cipher,
1057 ctx->ske->prop->pkcs,
1058 ctx->ske->prop->hash,
1059 ctx->ske->prop->hmac,
1060 ctx->ske->prop->group,
1062 silc_protocol_free(protocol);
1063 sock->protocol = NULL;
1064 silc_ske_free_key_material(ctx->keymat);
1066 silc_packet_context_free(ctx->packet);
1068 silc_ske_free(ctx->ske);
1070 silc_free(ctx->dest_id);
1072 silc_task_unregister_by_callback(server->timeout_queue,
1073 silc_server_failure_callback);
1074 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1075 "Key exchange failed");
1076 server->stat.auth_failures++;
1079 silc_ske_free_key_material(ctx->keymat);
1081 /* Allocate internal context for the authentication protocol. This
1082 is sent as context for the protocol. */
1083 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1084 proto_ctx->server = (void *)server;
1085 proto_ctx->sock = sock;
1086 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1087 proto_ctx->responder = TRUE;
1088 proto_ctx->dest_id_type = ctx->dest_id_type;
1089 proto_ctx->dest_id = ctx->dest_id;
1091 /* Free old protocol as it is finished now */
1092 silc_protocol_free(protocol);
1094 silc_packet_context_free(ctx->packet);
1096 sock->protocol = NULL;
1098 /* Allocate the authentication protocol. This is allocated here
1099 but we won't start it yet. We will be receiving party of this
1100 protocol thus we will wait that connecting party will make
1101 their first move. */
1102 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1103 &sock->protocol, proto_ctx,
1104 silc_server_accept_new_connection_final);
1106 /* Register timeout task. If the protocol is not executed inside
1107 this timelimit the connection will be terminated. Currently
1108 this is 60 seconds and is hard coded limit (XXX). */
1109 proto_ctx->timeout_task =
1110 silc_task_register(server->timeout_queue, sock->sock,
1111 silc_server_timeout_remote,
1112 (void *)server, 60, 0,
1117 /* Final part of accepting new connection. The connection has now
1118 been authenticated and keys has been exchanged. We also know whether
1119 this is client or server connection. */
1121 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1123 SilcProtocol protocol = (SilcProtocol)context;
1124 SilcServerConnAuthInternalContext *ctx =
1125 (SilcServerConnAuthInternalContext *)protocol->context;
1126 SilcServer server = (SilcServer)ctx->server;
1127 SilcSocketConnection sock = ctx->sock;
1128 SilcServerHBContext hb_context;
1129 void *id_entry = NULL;
1131 SILC_LOG_DEBUG(("Start"));
1133 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1134 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1135 /* Error occured during protocol */
1136 silc_protocol_free(protocol);
1137 sock->protocol = NULL;
1139 silc_packet_context_free(ctx->packet);
1141 silc_ske_free(ctx->ske);
1143 silc_free(ctx->dest_id);
1146 sock->protocol = NULL;
1147 silc_task_unregister_by_callback(server->timeout_queue,
1148 silc_server_failure_callback);
1149 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1150 "Authentication failed");
1151 server->stat.auth_failures++;
1155 sock->type = ctx->conn_type;
1156 switch(sock->type) {
1157 case SILC_SOCKET_TYPE_CLIENT:
1159 SilcClientEntry client;
1161 SILC_LOG_DEBUG(("Remote host is client"));
1162 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1165 /* Add the client to the client ID cache. The nickname and Client ID
1166 and other information is created after we have received NEW_CLIENT
1167 packet from client. */
1168 client = silc_idlist_add_client(server->local_list,
1169 NULL, 0, NULL, NULL, NULL, NULL, sock);
1171 SILC_LOG_ERROR(("Could not add new client to cache"));
1172 silc_free(sock->user_data);
1177 server->stat.my_clients++;
1178 server->stat.clients++;
1179 if (server->server_type == SILC_ROUTER)
1180 server->stat.cell_clients++;
1182 id_entry = (void *)client;
1185 case SILC_SOCKET_TYPE_SERVER:
1186 case SILC_SOCKET_TYPE_ROUTER:
1188 SilcServerEntry new_server;
1190 SILC_LOG_DEBUG(("Remote host is %s",
1191 sock->type == SILC_SOCKET_TYPE_SERVER ?
1192 "server" : "router"));
1193 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1194 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
1195 "server" : "router"));
1197 /* Add the server into server cache. The server name and Server ID
1198 is updated after we have received NEW_SERVER packet from the
1199 server. We mark ourselves as router for this server if we really
1202 silc_idlist_add_server(server->local_list, NULL,
1203 sock->type == SILC_SOCKET_TYPE_SERVER ?
1204 SILC_SERVER : SILC_ROUTER, NULL,
1205 sock->type == SILC_SOCKET_TYPE_SERVER ?
1206 server->id_entry : NULL, sock);
1208 SILC_LOG_ERROR(("Could not add new server to cache"));
1209 silc_free(sock->user_data);
1214 if (sock->type == SILC_SOCKET_TYPE_SERVER)
1215 server->stat.my_servers++;
1217 server->stat.my_routers++;
1218 server->stat.servers++;
1220 id_entry = (void *)new_server;
1222 /* There is connection to other server now, if it is router then
1223 we will have connection to outside world. If we are router but
1224 normal server connected to us then we will remain standalone,
1225 if we are standlone. */
1226 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
1227 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1228 server->standalone = FALSE;
1229 if (!server->id_entry->router) {
1230 server->id_entry->router = id_entry;
1231 server->router = id_entry;
1240 /* Add the common data structure to the ID entry. */
1242 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1244 /* Add to sockets internal pointer for fast referencing */
1245 silc_free(sock->user_data);
1246 sock->user_data = id_entry;
1248 /* Connection has been fully established now. Everything is ok. */
1249 SILC_LOG_DEBUG(("New connection authenticated"));
1251 /* Perform keepalive. The `hb_context' will be freed automatically
1252 when finally calling the silc_socket_free function. XXX hardcoded
1254 hb_context = silc_calloc(1, sizeof(*hb_context));
1255 hb_context->server = server;
1256 silc_socket_set_heartbeat(sock, 600, hb_context,
1257 silc_server_perform_heartbeat,
1258 server->timeout_queue);
1260 silc_task_unregister_by_callback(server->timeout_queue,
1261 silc_server_failure_callback);
1262 silc_protocol_free(protocol);
1264 silc_packet_context_free(ctx->packet);
1266 silc_ske_free(ctx->ske);
1268 silc_free(ctx->dest_id);
1270 sock->protocol = NULL;
1273 /* This function is used to read packets from network and send packets to
1274 network. This is usually a generic task. */
1276 SILC_TASK_CALLBACK(silc_server_packet_process)
1278 SilcServer server = (SilcServer)context;
1279 SilcSocketConnection sock = server->sockets[fd];
1280 SilcIDListData idata;
1281 SilcCipher cipher = NULL;
1282 SilcHmac hmac = NULL;
1288 SILC_LOG_DEBUG(("Processing packet"));
1290 /* Packet sending */
1292 if (type == SILC_TASK_WRITE) {
1293 /* Do not send data to disconnected connection */
1294 if (SILC_IS_DISCONNECTED(sock))
1297 server->stat.packets_sent++;
1299 if (sock->outbuf->data - sock->outbuf->head)
1300 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1302 ret = silc_server_packet_send_real(server, sock, TRUE);
1304 /* If returned -2 could not write to connection now, will do
1312 /* The packet has been sent and now it is time to set the connection
1313 back to only for input. When there is again some outgoing data
1314 available for this connection it will be set for output as well.
1315 This call clears the output setting and sets it only for input. */
1316 SILC_SET_CONNECTION_FOR_INPUT(fd);
1317 SILC_UNSET_OUTBUF_PENDING(sock);
1319 silc_buffer_clear(sock->outbuf);
1323 /* Packet receiving */
1325 /* Read some data from connection */
1326 ret = silc_packet_receive(sock);
1332 SILC_LOG_DEBUG(("Read EOF"));
1334 /* If connection is disconnecting already we will finally
1335 close the connection */
1336 if (SILC_IS_DISCONNECTING(sock)) {
1337 if (sock->user_data)
1338 silc_server_free_sock_user_data(server, sock);
1339 silc_server_close_connection(server, sock);
1343 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1344 SILC_SET_DISCONNECTING(sock);
1346 /* If the closed connection was our primary router connection the
1347 start re-connecting phase. */
1348 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1349 sock == server->router->connection)
1350 silc_task_register(server->timeout_queue, 0,
1351 silc_server_connect_to_router,
1354 SILC_TASK_PRI_NORMAL);
1356 if (sock->user_data)
1357 silc_server_free_sock_user_data(server, sock);
1358 silc_server_close_connection(server, sock);
1362 /* If connection is disconnecting or disconnected we will ignore
1364 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1365 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1369 server->stat.packets_received++;
1371 /* Get keys and stuff from ID entry */
1372 idata = (SilcIDListData)sock->user_data;
1374 idata->last_receive = time(NULL);
1375 cipher = idata->receive_key;
1379 /* Process the packet. This will call the parser that will then
1380 decrypt and parse the packet. */
1381 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1385 /* Callback function that the silc_packet_decrypt will call to make the
1386 decision whether the packet is normal or special packet. We will
1387 return TRUE if it is normal and FALSE if it is special */
1389 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1391 SilcPacketContext *packet,
1394 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1395 SilcServer server = (SilcServer)parse_ctx->context;
1397 /* Packet is normal packet, if:
1399 1) packet is private message packet and does not have private key set
1400 2) is other packet than channel message packet
1401 3) is channel message packet and remote is router and we are router
1403 all other packets are special packets
1406 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1407 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1410 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1411 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1412 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1413 server->server_type == SILC_ROUTER))
1419 /* Parses whole packet, received earlier. */
1421 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1423 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1424 SilcServer server = (SilcServer)parse_ctx->context;
1425 SilcSocketConnection sock = parse_ctx->sock;
1426 SilcPacketContext *packet = parse_ctx->packet;
1429 SILC_LOG_DEBUG(("Start"));
1431 /* Decrypt the received packet */
1432 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1433 packet->buffer, packet,
1434 silc_server_packet_decrypt_check, parse_ctx);
1439 /* Parse the packet. Packet type is returned. */
1440 ret = silc_packet_parse(packet);
1442 /* Parse the packet header in special way as this is "special"
1444 ret = silc_packet_parse_special(packet);
1447 if (ret == SILC_PACKET_NONE)
1450 /* Check that the the current client ID is same as in the client's packet. */
1451 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1452 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1453 if (client && client->id) {
1454 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1455 packet->src_id_type);
1456 if (SILC_ID_CLIENT_COMPARE(client->id, id)) {
1464 if (server->server_type == SILC_ROUTER) {
1465 /* Route the packet if it is not destined to us. Other ID types but
1466 server are handled separately after processing them. */
1467 if (packet->dst_id_type == SILC_ID_SERVER &&
1468 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1469 SILC_ID_SERVER_COMPARE(packet->dst_id, server->id_string)) {
1471 /* Route the packet to fastest route for the destination ID */
1472 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1473 packet->dst_id_type);
1476 silc_server_packet_route(server,
1477 silc_server_route_get(server, id,
1478 packet->dst_id_type),
1484 /* Broadcast packet if it is marked as broadcast packet and it is
1485 originated from router and we are router. */
1486 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1487 packet->flags & SILC_PACKET_FLAG_BROADCAST) {
1488 silc_server_packet_broadcast(server, server->router->connection, packet);
1492 /* Parse the incoming packet type */
1493 silc_server_packet_parse_type(server, sock, packet);
1496 /* silc_buffer_clear(sock->inbuf); */
1497 silc_packet_context_free(packet);
1498 silc_free(parse_ctx);
1501 /* Parser callback called by silc_packet_receive_process. This merely
1502 registers timeout that will handle the actual parsing when appropriate. */
1504 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1506 SilcServer server = (SilcServer)parser_context->context;
1507 SilcSocketConnection sock = parser_context->sock;
1509 switch (sock->type) {
1510 case SILC_SOCKET_TYPE_UNKNOWN:
1511 /* Parse the packet with timeout */
1512 silc_task_register(server->timeout_queue, sock->sock,
1513 silc_server_packet_parse_real,
1514 (void *)parser_context, 0, 100000,
1516 SILC_TASK_PRI_NORMAL);
1518 case SILC_SOCKET_TYPE_CLIENT:
1519 /* Parse the packet with timeout (unless protocol is active) */
1520 silc_task_register(server->timeout_queue, sock->sock,
1521 silc_server_packet_parse_real,
1522 (void *)parser_context, 0,
1523 (sock->protocol ? 1 : 100000),
1525 SILC_TASK_PRI_NORMAL);
1527 case SILC_SOCKET_TYPE_SERVER:
1528 case SILC_SOCKET_TYPE_ROUTER:
1529 /* Packets from servers are parsed as soon as possible */
1530 silc_task_register(server->timeout_queue, sock->sock,
1531 silc_server_packet_parse_real,
1532 (void *)parser_context, 0, 1,
1534 SILC_TASK_PRI_NORMAL);
1541 /* Parses the packet type and calls what ever routines the packet type
1542 requires. This is done for all incoming packets. */
1544 void silc_server_packet_parse_type(SilcServer server,
1545 SilcSocketConnection sock,
1546 SilcPacketContext *packet)
1548 SilcPacketType type = packet->type;
1550 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1552 /* Parse the packet type */
1554 case SILC_PACKET_DISCONNECT:
1555 SILC_LOG_DEBUG(("Disconnect packet"));
1556 if (packet->flags & SILC_PACKET_FLAG_LIST)
1560 case SILC_PACKET_SUCCESS:
1562 * Success received for something. For now we can have only
1563 * one protocol for connection executing at once hence this
1564 * success message is for whatever protocol is executing currently.
1566 SILC_LOG_DEBUG(("Success packet"));
1567 if (packet->flags & SILC_PACKET_FLAG_LIST)
1569 if (sock->protocol) {
1570 sock->protocol->execute(server->timeout_queue, 0,
1571 sock->protocol, sock->sock, 0, 0);
1575 case SILC_PACKET_FAILURE:
1577 * Failure received for something. For now we can have only
1578 * one protocol for connection executing at once hence this
1579 * failure message is for whatever protocol is executing currently.
1581 SILC_LOG_DEBUG(("Failure packet"));
1582 if (packet->flags & SILC_PACKET_FLAG_LIST)
1584 if (sock->protocol) {
1585 SilcServerFailureContext f;
1586 f = silc_calloc(1, sizeof(*f));
1590 /* We will wait 5 seconds to process this failure packet */
1591 silc_task_register(server->timeout_queue, sock->sock,
1592 silc_server_failure_callback, (void *)f, 5, 0,
1593 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1597 case SILC_PACKET_REJECT:
1598 SILC_LOG_DEBUG(("Reject packet"));
1599 if (packet->flags & SILC_PACKET_FLAG_LIST)
1604 case SILC_PACKET_NOTIFY:
1606 * Received notify packet. Server can receive notify packets from
1607 * router. Server then relays the notify messages to clients if needed.
1609 SILC_LOG_DEBUG(("Notify packet"));
1610 if (packet->flags & SILC_PACKET_FLAG_LIST)
1611 silc_server_notify_list(server, sock, packet);
1613 silc_server_notify(server, sock, packet);
1619 case SILC_PACKET_CHANNEL_MESSAGE:
1621 * Received channel message. Channel messages are special packets
1622 * (although probably most common ones) thus they are handled
1625 SILC_LOG_DEBUG(("Channel Message packet"));
1626 if (packet->flags & SILC_PACKET_FLAG_LIST)
1628 silc_server_channel_message(server, sock, packet);
1631 case SILC_PACKET_CHANNEL_KEY:
1633 * Received key for channel. As channels are created by the router
1634 * the keys are as well. We will distribute the key to all of our
1635 * locally connected clients on the particular channel. Router
1636 * never receives this channel and thus is ignored.
1638 SILC_LOG_DEBUG(("Channel Key packet"));
1639 if (packet->flags & SILC_PACKET_FLAG_LIST)
1641 silc_server_channel_key(server, sock, packet);
1647 case SILC_PACKET_COMMAND:
1649 * Recived command. Processes the command request and allocates the
1650 * command context and calls the command.
1652 SILC_LOG_DEBUG(("Command packet"));
1653 if (packet->flags & SILC_PACKET_FLAG_LIST)
1655 silc_server_command_process(server, sock, packet);
1658 case SILC_PACKET_COMMAND_REPLY:
1660 * Received command reply packet. Received command reply to command. It
1661 * may be reply to command sent by us or reply to command sent by client
1662 * that we've routed further.
1664 SILC_LOG_DEBUG(("Command Reply packet"));
1665 if (packet->flags & SILC_PACKET_FLAG_LIST)
1667 silc_server_command_reply(server, sock, packet);
1671 * Private Message packets
1673 case SILC_PACKET_PRIVATE_MESSAGE:
1675 * Received private message packet. The packet is coming from either
1678 SILC_LOG_DEBUG(("Private Message packet"));
1679 if (packet->flags & SILC_PACKET_FLAG_LIST)
1681 silc_server_private_message(server, sock, packet);
1684 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1686 * Private message key packet.
1688 if (packet->flags & SILC_PACKET_FLAG_LIST)
1690 silc_server_private_message_key(server, sock, packet);
1694 * Key Exchange protocol packets
1696 case SILC_PACKET_KEY_EXCHANGE:
1697 SILC_LOG_DEBUG(("KE packet"));
1698 if (packet->flags & SILC_PACKET_FLAG_LIST)
1701 if (sock->protocol && sock->protocol->protocol &&
1702 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1704 SilcServerKEInternalContext *proto_ctx =
1705 (SilcServerKEInternalContext *)sock->protocol->context;
1707 proto_ctx->packet = silc_packet_context_dup(packet);
1709 /* Let the protocol handle the packet */
1710 sock->protocol->execute(server->timeout_queue, 0,
1711 sock->protocol, sock->sock, 0, 100000);
1713 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1714 "protocol active, packet dropped."));
1716 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1720 case SILC_PACKET_KEY_EXCHANGE_1:
1721 SILC_LOG_DEBUG(("KE 1 packet"));
1722 if (packet->flags & SILC_PACKET_FLAG_LIST)
1725 if (sock->protocol && sock->protocol->protocol &&
1726 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1727 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1729 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1730 SilcServerRekeyInternalContext *proto_ctx =
1731 (SilcServerRekeyInternalContext *)sock->protocol->context;
1733 if (proto_ctx->packet)
1734 silc_packet_context_free(proto_ctx->packet);
1736 proto_ctx->packet = silc_packet_context_dup(packet);
1738 /* Let the protocol handle the packet */
1739 sock->protocol->execute(server->timeout_queue, 0,
1740 sock->protocol, sock->sock, 0, 0);
1742 SilcServerKEInternalContext *proto_ctx =
1743 (SilcServerKEInternalContext *)sock->protocol->context;
1745 if (proto_ctx->packet)
1746 silc_packet_context_free(proto_ctx->packet);
1748 proto_ctx->packet = silc_packet_context_dup(packet);
1749 proto_ctx->dest_id_type = packet->src_id_type;
1750 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1751 packet->src_id_type);
1752 if (!proto_ctx->dest_id)
1755 /* Let the protocol handle the packet */
1756 sock->protocol->execute(server->timeout_queue, 0,
1757 sock->protocol, sock->sock,
1761 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1762 "protocol active, packet dropped."));
1766 case SILC_PACKET_KEY_EXCHANGE_2:
1767 SILC_LOG_DEBUG(("KE 2 packet"));
1768 if (packet->flags & SILC_PACKET_FLAG_LIST)
1771 if (sock->protocol && sock->protocol->protocol &&
1772 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1773 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1775 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1776 SilcServerRekeyInternalContext *proto_ctx =
1777 (SilcServerRekeyInternalContext *)sock->protocol->context;
1779 if (proto_ctx->packet)
1780 silc_packet_context_free(proto_ctx->packet);
1782 proto_ctx->packet = silc_packet_context_dup(packet);
1784 /* Let the protocol handle the packet */
1785 sock->protocol->execute(server->timeout_queue, 0,
1786 sock->protocol, sock->sock, 0, 0);
1788 SilcServerKEInternalContext *proto_ctx =
1789 (SilcServerKEInternalContext *)sock->protocol->context;
1791 if (proto_ctx->packet)
1792 silc_packet_context_free(proto_ctx->packet);
1794 proto_ctx->packet = silc_packet_context_dup(packet);
1795 proto_ctx->dest_id_type = packet->src_id_type;
1796 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1797 packet->src_id_type);
1798 if (!proto_ctx->dest_id)
1801 /* Let the protocol handle the packet */
1802 sock->protocol->execute(server->timeout_queue, 0,
1803 sock->protocol, sock->sock,
1807 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1808 "protocol active, packet dropped."));
1812 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1814 * Connection authentication request packet. When we receive this packet
1815 * we will send to the other end information about our mandatory
1816 * authentication method for the connection. This packet maybe received
1819 SILC_LOG_DEBUG(("Connection authentication request packet"));
1820 if (packet->flags & SILC_PACKET_FLAG_LIST)
1822 silc_server_connection_auth_request(server, sock, packet);
1826 * Connection Authentication protocol packets
1828 case SILC_PACKET_CONNECTION_AUTH:
1829 /* Start of the authentication protocol. We receive here the
1830 authentication data and will verify it. */
1831 SILC_LOG_DEBUG(("Connection auth packet"));
1832 if (packet->flags & SILC_PACKET_FLAG_LIST)
1835 if (sock->protocol && sock->protocol->protocol->type
1836 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1838 SilcServerConnAuthInternalContext *proto_ctx =
1839 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1841 proto_ctx->packet = silc_packet_context_dup(packet);
1843 /* Let the protocol handle the packet */
1844 sock->protocol->execute(server->timeout_queue, 0,
1845 sock->protocol, sock->sock, 0, 0);
1847 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1848 "protocol active, packet dropped."));
1852 case SILC_PACKET_NEW_ID:
1854 * Received New ID packet. This includes some new ID that has been
1855 * created. It may be for client, server or channel. This is the way
1856 * to distribute information about new registered entities in the
1859 SILC_LOG_DEBUG(("New ID packet"));
1860 if (packet->flags & SILC_PACKET_FLAG_LIST)
1861 silc_server_new_id_list(server, sock, packet);
1863 silc_server_new_id(server, sock, packet);
1866 case SILC_PACKET_NEW_CLIENT:
1868 * Received new client packet. This includes client information that
1869 * we will use to create initial client ID. After creating new
1870 * ID we will send it to the client.
1872 SILC_LOG_DEBUG(("New Client packet"));
1873 if (packet->flags & SILC_PACKET_FLAG_LIST)
1875 silc_server_new_client(server, sock, packet);
1878 case SILC_PACKET_NEW_SERVER:
1880 * Received new server packet. This includes Server ID and some other
1881 * information that we may save. This is received after server has
1884 SILC_LOG_DEBUG(("New Server packet"));
1885 if (packet->flags & SILC_PACKET_FLAG_LIST)
1887 silc_server_new_server(server, sock, packet);
1890 case SILC_PACKET_NEW_CHANNEL:
1892 * Received new channel packet. Information about new channel in the
1893 * network are distributed using this packet.
1895 SILC_LOG_DEBUG(("New Channel packet"));
1896 if (packet->flags & SILC_PACKET_FLAG_LIST)
1897 silc_server_new_channel_list(server, sock, packet);
1899 silc_server_new_channel(server, sock, packet);
1902 case SILC_PACKET_HEARTBEAT:
1904 * Received heartbeat.
1906 SILC_LOG_DEBUG(("Heartbeat packet"));
1907 if (packet->flags & SILC_PACKET_FLAG_LIST)
1911 case SILC_PACKET_KEY_AGREEMENT:
1913 * Received heartbeat.
1915 SILC_LOG_DEBUG(("Key agreement packet"));
1916 if (packet->flags & SILC_PACKET_FLAG_LIST)
1918 silc_server_key_agreement(server, sock, packet);
1921 case SILC_PACKET_REKEY:
1923 * Received re-key packet. The sender wants to regenerate the session
1926 SILC_LOG_DEBUG(("Re-key packet"));
1927 if (packet->flags & SILC_PACKET_FLAG_LIST)
1929 silc_server_rekey(server, sock, packet);
1932 case SILC_PACKET_REKEY_DONE:
1934 * The re-key is done.
1936 SILC_LOG_DEBUG(("Re-key done packet"));
1937 if (packet->flags & SILC_PACKET_FLAG_LIST)
1940 if (sock->protocol && sock->protocol->protocol &&
1941 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1943 SilcServerRekeyInternalContext *proto_ctx =
1944 (SilcServerRekeyInternalContext *)sock->protocol->context;
1946 if (proto_ctx->packet)
1947 silc_packet_context_free(proto_ctx->packet);
1949 proto_ctx->packet = silc_packet_context_dup(packet);
1951 /* Let the protocol handle the packet */
1952 sock->protocol->execute(server->timeout_queue, 0,
1953 sock->protocol, sock->sock,
1956 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1957 "protocol active, packet dropped."));
1962 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1968 /* Creates connection to a remote router. */
1970 void silc_server_create_connection(SilcServer server,
1971 char *remote_host, uint32 port)
1973 SilcServerConnection sconn;
1975 /* Allocate connection object for hold connection specific stuff. */
1976 sconn = silc_calloc(1, sizeof(*sconn));
1977 sconn->server = server;
1978 sconn->remote_host = strdup(remote_host);
1979 sconn->remote_port = port;
1981 silc_task_register(server->timeout_queue, 0,
1982 silc_server_connect_router,
1983 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
1984 SILC_TASK_PRI_NORMAL);
1987 SILC_TASK_CALLBACK(silc_server_close_connection_final)
1989 silc_socket_free((SilcSocketConnection)context);
1992 /* Closes connection to socket connection */
1994 void silc_server_close_connection(SilcServer server,
1995 SilcSocketConnection sock)
1997 SILC_LOG_INFO(("Closing connection %s:%d [%s] (%d)", sock->hostname,
1999 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2000 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2001 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2002 "Router"), sock->sock));
2004 /* We won't listen for this connection anymore */
2005 silc_schedule_unset_listen_fd(sock->sock);
2007 /* Unregister all tasks */
2008 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2009 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2011 /* Close the actual connection */
2012 silc_net_close_connection(sock->sock);
2013 server->sockets[sock->sock] = NULL;
2015 silc_task_register(server->timeout_queue, 0,
2016 silc_server_close_connection_final,
2017 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2018 SILC_TASK_PRI_NORMAL);
2021 /* Sends disconnect message to remote connection and disconnects the
2024 void silc_server_disconnect_remote(SilcServer server,
2025 SilcSocketConnection sock,
2026 const char *fmt, ...)
2029 unsigned char buf[4096];
2034 memset(buf, 0, sizeof(buf));
2036 vsprintf(buf, fmt, ap);
2039 SILC_LOG_DEBUG(("Disconnecting remote host"));
2041 SILC_LOG_INFO(("Disconnecting %s:%d [%s]", sock->hostname,
2043 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2044 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2045 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2048 /* Notify remote end that the conversation is over. The notify message
2049 is tried to be sent immediately. */
2050 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2051 buf, strlen(buf), TRUE);
2053 /* Mark the connection to be disconnected */
2054 SILC_SET_DISCONNECTED(sock);
2055 silc_server_close_connection(server, sock);
2060 SilcClientEntry client;
2061 } *FreeClientInternal;
2063 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2065 FreeClientInternal i = (FreeClientInternal)context;
2067 silc_idlist_del_data(i->client);
2068 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2072 /* Frees client data and notifies about client's signoff. */
2074 void silc_server_free_client_data(SilcServer server,
2075 SilcSocketConnection sock,
2076 SilcClientEntry client,
2080 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2082 /* If there is pending outgoing data for the client then purge it
2083 to the network before removing the client entry. */
2084 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2085 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2086 server->stat.packets_sent++;
2088 if (sock->outbuf->data - sock->outbuf->head)
2089 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2091 silc_server_packet_send_real(server, sock, TRUE);
2093 SILC_SET_CONNECTION_FOR_INPUT(sock->sock);
2094 SILC_UNSET_OUTBUF_PENDING(sock);
2095 silc_buffer_clear(sock->outbuf);
2098 /* Send SIGNOFF notify to routers. */
2099 if (notify && !server->standalone && server->router)
2100 silc_server_send_notify_signoff(server, server->router->connection,
2101 server->server_type == SILC_SERVER ?
2102 FALSE : TRUE, client->id,
2103 SILC_ID_CLIENT_LEN, signoff);
2105 /* Remove client from all channels */
2107 silc_server_remove_from_channels(server, NULL, client,
2108 TRUE, signoff, TRUE);
2110 silc_server_remove_from_channels(server, NULL, client,
2111 FALSE, NULL, FALSE);
2113 /* We will not delete the client entry right away. We will take it
2114 into history (for WHOWAS command) for 5 minutes */
2117 silc_task_register(server->timeout_queue, 0,
2118 silc_server_free_client_data_timeout,
2120 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2121 client->data.registered = FALSE;
2123 /* Free the client entry and everything in it */
2124 server->stat.my_clients--;
2125 server->stat.clients--;
2126 if (server->server_type == SILC_ROUTER)
2127 server->stat.cell_clients--;
2130 /* Frees user_data pointer from socket connection object. This also sends
2131 appropriate notify packets to the network to inform about leaving
2134 void silc_server_free_sock_user_data(SilcServer server,
2135 SilcSocketConnection sock)
2137 SILC_LOG_DEBUG(("Start"));
2139 switch(sock->type) {
2140 case SILC_SOCKET_TYPE_CLIENT:
2142 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2143 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2146 case SILC_SOCKET_TYPE_SERVER:
2147 case SILC_SOCKET_TYPE_ROUTER:
2149 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2151 /* Free all client entries that this server owns as they will
2152 become invalid now as well. */
2153 silc_server_remove_clients_by_server(server, user_data, TRUE);
2155 /* If this was our primary router connection then we're lost to
2156 the outside world. */
2157 if (server->router == user_data) {
2158 server->id_entry->router = NULL;
2159 server->router = NULL;
2160 server->standalone = TRUE;
2163 /* Free the server entry */
2164 silc_idlist_del_data(user_data);
2165 silc_idlist_del_server(server->local_list, user_data);
2166 server->stat.my_servers--;
2167 server->stat.servers--;
2168 if (server->server_type == SILC_ROUTER)
2169 server->stat.cell_servers--;
2174 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2176 silc_idlist_del_data(user_data);
2177 silc_free(user_data);
2182 sock->user_data = NULL;
2185 /* This function is used to remove all client entries by the server `entry'.
2186 This is called when the connection is lost to the server. In this case
2187 we must invalidate all the client entries owned by the server `entry'.
2188 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2189 distributed to our local clients. */
2191 int silc_server_remove_clients_by_server(SilcServer server,
2192 SilcServerEntry entry,
2195 SilcIDCacheList list = NULL;
2196 SilcIDCacheEntry id_cache = NULL;
2197 SilcClientEntry client = NULL;
2199 SilcClientEntry *clients = NULL;
2200 uint32 clients_c = 0;
2201 unsigned char **argv = NULL;
2202 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2205 SILC_LOG_DEBUG(("Start"));
2207 if (server_signoff) {
2208 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2209 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2210 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2211 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2212 argv[argc] = idp->data;
2213 argv_lens[argc] = idp->len;
2214 argv_types[argc] = argc + 1;
2216 silc_buffer_free(idp);
2219 if (silc_idcache_find_by_id(server->local_list->clients,
2220 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2222 if (silc_idcache_list_first(list, &id_cache)) {
2224 client = (SilcClientEntry)id_cache->context;
2225 if (client->data.registered == FALSE) {
2226 if (!silc_idcache_list_next(list, &id_cache))
2232 if (client->router != entry) {
2233 if (server_signoff && client->connection) {
2234 clients = silc_realloc(clients,
2235 sizeof(*clients) * (clients_c + 1));
2236 clients[clients_c] = client;
2240 if (!silc_idcache_list_next(list, &id_cache))
2246 if (server_signoff) {
2247 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2248 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2249 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2251 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2253 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2254 memcpy(argv[argc], idp->data, idp->len);
2255 argv_lens[argc] = idp->len;
2256 argv_types[argc] = argc + 1;
2258 silc_buffer_free(idp);
2261 /* Remove the client entry */
2262 silc_server_remove_from_channels(server, NULL, client, FALSE,
2264 silc_idlist_del_client(server->local_list, client);
2266 if (!silc_idcache_list_next(list, &id_cache))
2270 silc_idcache_list_free(list);
2273 if (silc_idcache_find_by_id(server->global_list->clients,
2274 SILC_ID_CACHE_ANY, SILC_ID_CLIENT, &list)) {
2276 if (silc_idcache_list_first(list, &id_cache)) {
2278 client = (SilcClientEntry)id_cache->context;
2279 if (client->data.registered == FALSE) {
2280 if (!silc_idcache_list_next(list, &id_cache))
2286 if (client->router != entry) {
2287 if (server_signoff && client->connection) {
2288 clients = silc_realloc(clients,
2289 sizeof(*clients) * (clients_c + 1));
2290 clients[clients_c] = client;
2294 if (!silc_idcache_list_next(list, &id_cache))
2300 if (server_signoff) {
2301 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2302 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2303 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2305 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2307 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2308 memcpy(argv[argc], idp->data, idp->len);
2309 argv_lens[argc] = idp->len;
2310 argv_types[argc] = argc + 1;
2312 silc_buffer_free(idp);
2315 /* Remove the client entry */
2316 silc_server_remove_from_channels(server, NULL, client, FALSE,
2318 silc_idlist_del_client(server->global_list, client);
2320 if (!silc_idcache_list_next(list, &id_cache))
2324 silc_idcache_list_free(list);
2327 /* Send the SERVER_SIGNOFF notify */
2328 if (server_signoff) {
2331 /* Send SERVER_SIGNOFF notify to our primary router */
2332 if (!server->standalone && server->router) {
2333 args = silc_argument_payload_encode(1, argv, argv_lens,
2335 silc_server_send_notify_args(server,
2336 server->router->connection,
2337 server->server_type ==
2338 SILC_SERVER ? FALSE : TRUE,
2339 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2341 silc_buffer_free(args);
2344 args = silc_argument_payload_encode(argc, argv, argv_lens,
2346 /* Send to local clients */
2347 for (i = 0; i < clients_c; i++) {
2348 silc_server_send_notify_args(server, clients[i]->connection,
2349 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2354 silc_buffer_free(args);
2356 silc_free(argv_lens);
2357 silc_free(argv_types);
2363 /* Checks whether given channel has global users. If it does this returns
2364 TRUE and FALSE if there is only locally connected clients on the channel. */
2366 int silc_server_channel_has_global(SilcChannelEntry channel)
2368 SilcChannelClientEntry chl;
2370 silc_list_start(channel->user_list);
2371 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2372 if (chl->client->router)
2379 /* Checks whether given channel has locally connected users. If it does this
2380 returns TRUE and FALSE if there is not one locally connected client. */
2382 int silc_server_channel_has_local(SilcChannelEntry channel)
2384 SilcChannelClientEntry chl;
2386 silc_list_start(channel->user_list);
2387 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2388 if (!chl->client->router)
2395 /* Removes client from all channels it has joined. This is used when client
2396 connection is disconnected. If the client on a channel is last, the
2397 channel is removed as well. This sends the SIGNOFF notify types. */
2399 void silc_server_remove_from_channels(SilcServer server,
2400 SilcSocketConnection sock,
2401 SilcClientEntry client,
2403 char *signoff_message,
2406 SilcChannelEntry channel;
2407 SilcChannelClientEntry chl;
2410 SILC_LOG_DEBUG(("Start"));
2412 if (!client || !client->id)
2415 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2417 /* Remove the client from all channels. The client is removed from
2418 the channels' user list. */
2419 silc_list_start(client->channels);
2420 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2421 channel = chl->channel;
2423 /* Remove channel from client's channel list */
2424 silc_list_del(client->channels, chl);
2426 /* Remove channel if there is no users anymore */
2427 if (server->server_type == SILC_ROUTER &&
2428 silc_list_count(channel->user_list) < 2) {
2429 server->stat.my_channels--;
2432 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2434 if (channel->founder_key) {
2435 /* The founder auth data exists, do not remove the channel entry */
2436 SilcChannelClientEntry chl2;
2440 silc_list_start(channel->user_list);
2441 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2442 silc_list_del(chl2->client->channels, chl2);
2443 silc_list_del(channel->user_list, chl2);
2449 if (!silc_idlist_del_channel(server->local_list, channel))
2450 silc_idlist_del_channel(server->global_list, channel);
2454 /* Remove client from channel's client list */
2455 silc_list_del(channel->user_list, chl);
2457 server->stat.my_chanclients--;
2459 /* If there is no global users on the channel anymore mark the channel
2460 as local channel. */
2461 if (server->server_type == SILC_SERVER &&
2462 !silc_server_channel_has_global(channel))
2463 channel->global_users = FALSE;
2465 /* If there is not at least one local user on the channel then we don't
2466 need the channel entry anymore, we can remove it safely. */
2467 if (server->server_type == SILC_SERVER &&
2468 !silc_server_channel_has_local(channel)) {
2469 /* Notify about leaving client if this channel has global users. */
2470 if (notify && channel->global_users)
2471 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2472 SILC_NOTIFY_TYPE_SIGNOFF,
2473 signoff_message ? 2 : 1,
2474 clidp->data, clidp->len,
2475 signoff_message, signoff_message ?
2476 strlen(signoff_message) : 0);
2478 server->stat.my_channels--;
2481 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2483 if (channel->founder_key) {
2484 /* The founder auth data exists, do not remove the channel entry */
2485 SilcChannelClientEntry chl2;
2489 silc_list_start(channel->user_list);
2490 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2491 silc_list_del(chl2->client->channels, chl2);
2492 silc_list_del(channel->user_list, chl2);
2498 if (!silc_idlist_del_channel(server->local_list, channel))
2499 silc_idlist_del_channel(server->global_list, channel);
2503 /* Send notify to channel about client leaving SILC and thus
2504 the entire channel. */
2506 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2507 SILC_NOTIFY_TYPE_SIGNOFF,
2508 signoff_message ? 2 : 1,
2509 clidp->data, clidp->len,
2510 signoff_message, signoff_message ?
2511 strlen(signoff_message) : 0);
2513 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2514 /* Re-generate channel key */
2515 silc_server_create_channel_key(server, channel, 0);
2517 /* Send the channel key to the channel. The key of course is not sent
2518 to the client who was removed from the channel. */
2519 silc_server_send_channel_key(server, client->connection, channel,
2520 server->server_type == SILC_ROUTER ?
2521 FALSE : !server->standalone);
2525 silc_buffer_free(clidp);
2528 /* Removes client from one channel. This is used for example when client
2529 calls LEAVE command to remove itself from the channel. Returns TRUE
2530 if channel still exists and FALSE if the channel is removed when
2531 last client leaves the channel. If `notify' is FALSE notify messages
2534 int silc_server_remove_from_one_channel(SilcServer server,
2535 SilcSocketConnection sock,
2536 SilcChannelEntry channel,
2537 SilcClientEntry client,
2540 SilcChannelEntry ch;
2541 SilcChannelClientEntry chl;
2544 SILC_LOG_DEBUG(("Start"));
2546 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2548 /* Remove the client from the channel. The client is removed from
2549 the channel's user list. */
2550 silc_list_start(client->channels);
2551 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
2552 if (chl->channel != channel)
2557 /* Remove channel from client's channel list */
2558 silc_list_del(client->channels, chl);
2560 /* Remove channel if there is no users anymore */
2561 if (server->server_type == SILC_ROUTER &&
2562 silc_list_count(channel->user_list) < 2) {
2564 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2565 if (!silc_idlist_del_channel(server->local_list, channel))
2566 silc_idlist_del_channel(server->global_list, channel);
2567 silc_buffer_free(clidp);
2568 server->stat.my_channels--;
2572 /* Remove client from channel's client list */
2573 silc_list_del(channel->user_list, chl);
2575 server->stat.my_chanclients--;
2577 /* If there is no global users on the channel anymore mark the channel
2578 as local channel. */
2579 if (server->server_type == SILC_SERVER &&
2580 !silc_server_channel_has_global(channel))
2581 channel->global_users = FALSE;
2583 /* If there is not at least one local user on the channel then we don't
2584 need the channel entry anymore, we can remove it safely. */
2585 if (server->server_type == SILC_SERVER &&
2586 !silc_server_channel_has_local(channel)) {
2587 /* Notify about leaving client if this channel has global users. */
2588 if (notify && channel->global_users)
2589 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2590 SILC_NOTIFY_TYPE_LEAVE, 1,
2591 clidp->data, clidp->len);
2593 server->stat.my_channels--;
2594 silc_buffer_free(clidp);
2597 silc_task_unregister_by_context(server->timeout_queue, channel->rekey);
2599 if (channel->founder_key) {
2600 /* The founder auth data exists, do not remove the channel entry */
2601 SilcChannelClientEntry chl2;
2605 silc_list_start(channel->user_list);
2606 while ((chl2 = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2607 silc_list_del(chl2->client->channels, chl2);
2608 silc_list_del(channel->user_list, chl2);
2614 if (!silc_idlist_del_channel(server->local_list, channel))
2615 silc_idlist_del_channel(server->global_list, channel);
2619 /* Send notify to channel about client leaving the channel */
2621 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2622 SILC_NOTIFY_TYPE_LEAVE, 1,
2623 clidp->data, clidp->len);
2627 silc_buffer_free(clidp);
2631 /* Returns TRUE if the given client is on the channel. FALSE if not.
2632 This works because we assure that the user list on the channel is
2633 always in up to date thus we can only check the channel list from
2634 `client' which is faster than checking the user list from `channel'. */
2636 int silc_server_client_on_channel(SilcClientEntry client,
2637 SilcChannelEntry channel)
2639 SilcChannelClientEntry chl;
2641 if (!client || !channel)
2644 silc_list_start(client->channels);
2645 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END)
2646 if (chl->channel == channel)
2652 /* Timeout callback. This is called if connection is idle or for some
2653 other reason is not responding within some period of time. This
2654 disconnects the remote end. */
2656 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2658 SilcServer server = (SilcServer)context;
2659 SilcSocketConnection sock = server->sockets[fd];
2664 if (sock->user_data)
2665 silc_server_free_sock_user_data(server, sock);
2667 silc_server_disconnect_remote(server, sock,
2668 "Server closed connection: "
2669 "Connection timeout");
2672 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2673 function may be used only by router. In real SILC network all channels
2674 are created by routers thus this function is never used by normal
2677 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2678 SilcServerID *router_id,
2684 SilcChannelID *channel_id;
2685 SilcChannelEntry entry;
2689 SILC_LOG_DEBUG(("Creating new channel"));
2692 cipher = "aes-256-cbc";
2694 hmac = "hmac-sha1-96";
2696 /* Allocate cipher */
2697 if (!silc_cipher_alloc(cipher, &key))
2701 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2702 silc_cipher_free(key);
2706 channel_name = strdup(channel_name);
2708 /* Create the channel */
2709 silc_id_create_channel_id(router_id, server->rng, &channel_id);
2710 entry = silc_idlist_add_channel(server->local_list, channel_name,
2711 SILC_CHANNEL_MODE_NONE, channel_id,
2712 NULL, key, newhmac);
2714 silc_free(channel_name);
2718 entry->cipher = strdup(cipher);
2719 entry->hmac_name = strdup(hmac);
2721 /* Now create the actual key material */
2722 silc_server_create_channel_key(server, entry,
2723 silc_cipher_get_key_len(key) / 8);
2725 /* Notify other routers about the new channel. We send the packet
2726 to our primary route. */
2727 if (broadcast && server->standalone == FALSE)
2728 silc_server_send_new_channel(server, server->router->connection, TRUE,
2729 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2732 server->stat.my_channels++;
2737 /* Same as above but creates the channel with Channel ID `channel_id. */
2740 silc_server_create_new_channel_with_id(SilcServer server,
2744 SilcChannelID *channel_id,
2747 SilcChannelEntry entry;
2751 SILC_LOG_DEBUG(("Creating new channel"));
2754 cipher = "aes-256-cbc";
2756 hmac = "hmac-sha1-96";
2758 /* Allocate cipher */
2759 if (!silc_cipher_alloc(cipher, &key))
2763 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2764 silc_cipher_free(key);
2768 channel_name = strdup(channel_name);
2770 /* Create the channel */
2771 entry = silc_idlist_add_channel(server->local_list, channel_name,
2772 SILC_CHANNEL_MODE_NONE, channel_id,
2773 NULL, key, newhmac);
2775 silc_free(channel_name);
2779 /* Now create the actual key material */
2780 silc_server_create_channel_key(server, entry,
2781 silc_cipher_get_key_len(key) / 8);
2783 /* Notify other routers about the new channel. We send the packet
2784 to our primary route. */
2785 if (broadcast && server->standalone == FALSE)
2786 silc_server_send_new_channel(server, server->router->connection, TRUE,
2787 channel_name, entry->id, SILC_ID_CHANNEL_LEN,
2790 server->stat.my_channels++;
2795 /* Channel's key re-key timeout callback. */
2797 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
2799 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
2800 SilcServer server = (SilcServer)rekey->context;
2802 silc_server_create_channel_key(server, rekey->channel, rekey->key_len);
2803 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
2805 silc_task_register(server->timeout_queue, 0,
2806 silc_server_channel_key_rekey,
2807 (void *)rekey, 3600, 0,
2809 SILC_TASK_PRI_NORMAL);
2812 /* Generates new channel key. This is used to create the initial channel key
2813 but also to re-generate new key for channel. If `key_len' is provided
2814 it is the bytes of the key length. */
2816 void silc_server_create_channel_key(SilcServer server,
2817 SilcChannelEntry channel,
2821 unsigned char channel_key[32], hash[32];
2824 SILC_LOG_DEBUG(("Generating channel key"));
2826 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
2827 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
2831 if (!channel->channel_key)
2832 if (!silc_cipher_alloc("aes-256-cbc", &channel->channel_key))
2837 else if (channel->key_len)
2838 len = channel->key_len / 8;
2840 len = silc_cipher_get_key_len(channel->channel_key) / 8;
2842 /* Create channel key */
2843 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
2846 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
2848 /* Remove old key if exists */
2850 memset(channel->key, 0, channel->key_len / 8);
2851 silc_free(channel->key);
2855 channel->key_len = len * 8;
2856 channel->key = silc_calloc(len, sizeof(*channel->key));
2857 memcpy(channel->key, channel_key, len);
2858 memset(channel_key, 0, sizeof(channel_key));
2860 /* Generate HMAC key from the channel key data and set it */
2862 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2863 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
2864 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2865 memset(hash, 0, sizeof(hash));
2867 if (server->server_type == SILC_ROUTER) {
2868 if (!channel->rekey)
2869 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2870 channel->rekey->context = (void *)server;
2871 channel->rekey->channel = channel;
2872 channel->rekey->key_len = key_len;
2874 silc_task_unregister_by_callback(server->timeout_queue,
2875 silc_server_channel_key_rekey);
2876 silc_task_register(server->timeout_queue, 0,
2877 silc_server_channel_key_rekey,
2878 (void *)channel->rekey, 3600, 0,
2880 SILC_TASK_PRI_NORMAL);
2884 /* Saves the channel key found in the encoded `key_payload' buffer. This
2885 function is used when we receive Channel Key Payload and also when we're
2886 processing JOIN command reply. Returns entry to the channel. */
2888 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
2889 SilcBuffer key_payload,
2890 SilcChannelEntry channel)
2892 SilcChannelKeyPayload payload = NULL;
2893 SilcChannelID *id = NULL;
2894 unsigned char *tmp, hash[32];
2898 SILC_LOG_DEBUG(("Start"));
2900 /* Decode channel key payload */
2901 payload = silc_channel_key_payload_parse(key_payload);
2903 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2908 /* Get the channel entry */
2911 /* Get channel ID */
2912 tmp = silc_channel_key_get_id(payload, &tmp_len);
2913 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
2919 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
2921 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
2923 SILC_LOG_ERROR(("Received key for non-existent channel"));
2929 tmp = silc_channel_key_get_key(payload, &tmp_len);
2935 cipher = silc_channel_key_get_cipher(payload, NULL);
2941 /* Remove old key if exists */
2943 memset(channel->key, 0, channel->key_len / 8);
2944 silc_free(channel->key);
2945 silc_cipher_free(channel->channel_key);
2948 /* Create new cipher */
2949 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
2954 if (channel->cipher)
2955 silc_free(channel->cipher);
2956 channel->cipher = strdup(cipher);
2959 channel->key_len = tmp_len * 8;
2960 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2961 memcpy(channel->key, tmp, tmp_len);
2962 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
2964 /* Generate HMAC key from the channel key data and set it */
2966 silc_hmac_alloc("hmac-sha1-96", NULL, &channel->hmac);
2967 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
2968 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
2970 memset(hash, 0, sizeof(hash));
2971 memset(tmp, 0, tmp_len);
2973 if (server->server_type == SILC_ROUTER) {
2974 if (!channel->rekey)
2975 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
2976 channel->rekey->context = (void *)server;
2977 channel->rekey->channel = channel;
2979 silc_task_unregister_by_callback(server->timeout_queue,
2980 silc_server_channel_key_rekey);
2981 silc_task_register(server->timeout_queue, 0,
2982 silc_server_channel_key_rekey,
2983 (void *)channel->rekey, 3600, 0,
2985 SILC_TASK_PRI_NORMAL);
2992 silc_channel_key_payload_free(payload);
2997 /* Heartbeat callback. This function is set as argument for the
2998 silc_socket_set_heartbeat function. The library will call this function
2999 at the set time interval. */
3001 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3004 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3006 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3009 /* Send the heartbeat */
3010 silc_server_send_heartbeat(hb->server, sock);
3013 /* Returns assembled of all servers in the given ID list. The packet's
3014 form is dictated by the New ID payload. */
3016 static void silc_server_announce_get_servers(SilcServer server,
3018 SilcBuffer *servers)
3020 SilcIDCacheList list;
3021 SilcIDCacheEntry id_cache;
3022 SilcServerEntry entry;
3025 /* Go through all clients in the list */
3026 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3027 SILC_ID_SERVER, &list)) {
3028 if (silc_idcache_list_first(list, &id_cache)) {
3030 entry = (SilcServerEntry)id_cache->context;
3032 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3034 *servers = silc_buffer_realloc(*servers,
3036 (*servers)->truelen + idp->len :
3038 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3039 silc_buffer_put(*servers, idp->data, idp->len);
3040 silc_buffer_pull(*servers, idp->len);
3041 silc_buffer_free(idp);
3043 if (!silc_idcache_list_next(list, &id_cache))
3048 silc_idcache_list_free(list);
3052 /* This function is used by router to announce existing servers to our
3053 primary router when we've connected to it. */
3055 void silc_server_announce_servers(SilcServer server)
3057 SilcBuffer servers = NULL;
3059 SILC_LOG_DEBUG(("Announcing servers"));
3061 /* Get servers in local list */
3062 silc_server_announce_get_servers(server, server->local_list, &servers);
3064 /* Get servers in global list */
3065 silc_server_announce_get_servers(server, server->global_list, &servers);
3068 silc_buffer_push(servers, servers->data - servers->head);
3069 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3071 /* Send the packet */
3072 silc_server_packet_send(server, server->router->connection,
3073 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3074 servers->data, servers->len, TRUE);
3076 silc_buffer_free(servers);
3080 /* Returns assembled packet of all clients in the given ID list. The
3081 packet's form is dictated by the New ID Payload. */
3083 static void silc_server_announce_get_clients(SilcServer server,
3085 SilcBuffer *clients)
3087 SilcIDCacheList list;
3088 SilcIDCacheEntry id_cache;
3089 SilcClientEntry client;
3092 /* Go through all clients in the list */
3093 if (silc_idcache_find_by_id(id_list->clients, SILC_ID_CACHE_ANY,
3094 SILC_ID_CLIENT, &list)) {
3095 if (silc_idcache_list_first(list, &id_cache)) {
3097 client = (SilcClientEntry)id_cache->context;
3099 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3101 *clients = silc_buffer_realloc(*clients,
3103 (*clients)->truelen + idp->len :
3105 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3106 silc_buffer_put(*clients, idp->data, idp->len);
3107 silc_buffer_pull(*clients, idp->len);
3108 silc_buffer_free(idp);
3110 if (!silc_idcache_list_next(list, &id_cache))
3115 silc_idcache_list_free(list);
3119 /* This function is used to announce our existing clients to our router
3120 when we've connected to it. */
3122 void silc_server_announce_clients(SilcServer server)
3124 SilcBuffer clients = NULL;
3126 SILC_LOG_DEBUG(("Announcing clients"));
3128 /* Get clients in local list */
3129 silc_server_announce_get_clients(server, server->local_list,
3132 /* As router we announce our global list as well */
3133 if (server->server_type == SILC_ROUTER)
3134 silc_server_announce_get_clients(server, server->global_list,
3138 silc_buffer_push(clients, clients->data - clients->head);
3139 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3141 /* Send the packet */
3142 silc_server_packet_send(server, server->router->connection,
3143 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3144 clients->data, clients->len, TRUE);
3146 silc_buffer_free(clients);
3151 silc_server_announce_encode_join(uint32 argc, ...)
3156 return silc_notify_payload_encode(SILC_NOTIFY_TYPE_JOIN, argc, ap);
3159 /* Returns assembled packets for channel users of the `channel'. */
3161 void silc_server_announce_get_channel_users(SilcServer server,
3162 SilcChannelEntry channel,
3163 SilcBuffer *channel_users)
3165 SilcChannelClientEntry chl;
3166 SilcBuffer chidp, clidp;
3170 SILC_LOG_DEBUG(("Start"));
3172 /* Now find all users on the channel */
3173 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3174 silc_list_start(channel->user_list);
3175 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3176 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3177 tmp = silc_server_announce_encode_join(2, clidp->data, clidp->len,
3178 chidp->data, chidp->len);
3181 silc_buffer_realloc(*channel_users,
3183 (*channel_users)->truelen + len : len));
3184 silc_buffer_pull_tail(*channel_users,
3185 ((*channel_users)->end -
3186 (*channel_users)->data));
3188 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3189 silc_buffer_pull(*channel_users, len);
3190 silc_buffer_free(clidp);
3191 silc_buffer_free(tmp);
3193 silc_buffer_free(chidp);
3196 /* Returns assembled packets for all channels and users on those channels
3197 from the given ID List. The packets are in the form dictated by the
3198 New Channel and New Channel User payloads. */
3200 void silc_server_announce_get_channels(SilcServer server,
3202 SilcBuffer *channels,
3203 SilcBuffer *channel_users)
3205 SilcIDCacheList list;
3206 SilcIDCacheEntry id_cache;
3207 SilcChannelEntry channel;
3212 SILC_LOG_DEBUG(("Start"));
3214 /* Go through all channels in the list */
3215 if (silc_idcache_find_by_id(id_list->channels, SILC_ID_CACHE_ANY,
3216 SILC_ID_CHANNEL, &list)) {
3217 if (silc_idcache_list_first(list, &id_cache)) {
3219 channel = (SilcChannelEntry)id_cache->context;
3221 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3222 name_len = strlen(channel->channel_name);
3224 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3226 silc_buffer_realloc(*channels,
3227 (*channels ? (*channels)->truelen + len : len));
3228 silc_buffer_pull_tail(*channels,
3229 ((*channels)->end - (*channels)->data));
3230 silc_buffer_format(*channels,
3231 SILC_STR_UI_SHORT(name_len),
3232 SILC_STR_UI_XNSTRING(channel->channel_name,
3234 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3235 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3236 SILC_STR_UI_INT(channel->mode),
3238 silc_buffer_pull(*channels, len);
3240 silc_server_announce_get_channel_users(server, channel,
3245 if (!silc_idcache_list_next(list, &id_cache))
3250 silc_idcache_list_free(list);
3254 /* This function is used to announce our existing channels to our router
3255 when we've connected to it. This also announces the users on the
3256 channels to the router. */
3258 void silc_server_announce_channels(SilcServer server)
3260 SilcBuffer channels = NULL, channel_users = NULL;
3262 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3264 /* Get channels and channel users in local list */
3265 silc_server_announce_get_channels(server, server->local_list,
3266 &channels, &channel_users);
3268 /* Get channels and channel users in global list */
3269 silc_server_announce_get_channels(server, server->global_list,
3270 &channels, &channel_users);
3273 silc_buffer_push(channels, channels->data - channels->head);
3274 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3276 /* Send the packet */
3277 silc_server_packet_send(server, server->router->connection,
3278 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3279 channels->data, channels->len,
3282 silc_buffer_free(channels);
3285 if (channel_users) {
3286 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3287 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3288 channel_users->len);
3290 /* Send the packet */
3291 silc_server_packet_send(server, server->router->connection,
3292 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3293 channel_users->data, channel_users->len,
3296 silc_buffer_free(channel_users);
3300 /* Failure timeout callback. If this is called then we will immediately
3301 process the received failure. We always process the failure with timeout
3302 since we do not want to blindly trust to received failure packets.
3303 This won't be called (the timeout is cancelled) if the failure was
3304 bogus (it is bogus if remote does not close the connection after sending
3307 SILC_TASK_CALLBACK(silc_server_failure_callback)
3309 SilcServerFailureContext f = (SilcServerFailureContext)context;
3311 if (f->sock->protocol) {
3312 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3313 f->sock->protocol->execute(f->server->timeout_queue, 0,
3314 f->sock->protocol, f->sock->sock, 0, 0);
3320 /* Assembles user list and users mode list from the `channel'. */
3322 void silc_server_get_users_on_channel(SilcServer server,
3323 SilcChannelEntry channel,
3324 SilcBuffer *user_list,
3325 SilcBuffer *mode_list,
3328 SilcChannelClientEntry chl;
3329 SilcBuffer client_id_list;
3330 SilcBuffer client_mode_list;
3332 uint32 list_count = 0;
3334 client_id_list = silc_buffer_alloc((SILC_ID_CLIENT_LEN + 4) *
3335 silc_list_count(channel->user_list));
3336 client_mode_list = silc_buffer_alloc(4 *
3337 silc_list_count(channel->user_list));
3338 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3339 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3340 silc_list_start(channel->user_list);
3341 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
3343 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3344 silc_buffer_put(client_id_list, idp->data, idp->len);
3345 silc_buffer_pull(client_id_list, idp->len);
3346 silc_buffer_free(idp);
3348 /* Client's mode on channel */
3349 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3350 silc_buffer_pull(client_mode_list, 4);
3354 silc_buffer_push(client_id_list,
3355 client_id_list->data - client_id_list->head);
3356 silc_buffer_push(client_mode_list,
3357 client_mode_list->data - client_mode_list->head);
3359 *user_list = client_id_list;
3360 *mode_list = client_mode_list;
3361 *user_count = list_count;
3364 /* Saves users and their modes to the `channel'. */
3366 void silc_server_save_users_on_channel(SilcServer server,
3367 SilcSocketConnection sock,
3368 SilcChannelEntry channel,
3369 SilcClientID *noadd,
3370 SilcBuffer user_list,
3371 SilcBuffer mode_list,
3376 /* Cache the received Client ID's and modes. This cache expires
3377 whenever server sends notify message to channel. It means two things;
3378 some user has joined or leaved the channel. XXX TODO! */
3379 for (i = 0; i < user_count; i++) {
3382 SilcClientID *client_id;
3383 SilcClientEntry client;
3386 SILC_GET16_MSB(idp_len, user_list->data + 2);
3388 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3389 silc_buffer_pull(user_list, idp_len);
3394 SILC_GET32_MSB(mode, mode_list->data);
3395 silc_buffer_pull(mode_list, 4);
3397 if (noadd && !SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3398 silc_free(client_id);
3402 /* Check if we have this client cached already. */
3403 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3406 client = silc_idlist_find_client_by_id(server->global_list,
3409 /* If router did not find such Client ID in its lists then this must
3410 be bogus client or some router in the net is buggy. */
3411 if (server->server_type == SILC_ROUTER) {
3412 silc_free(client_id);
3416 /* We don't have that client anywhere, add it. The client is added
3417 to global list since server didn't have it in the lists so it must be
3419 client = silc_idlist_add_client(server->global_list, NULL, 0, NULL,
3421 silc_id_dup(client_id, SILC_ID_CLIENT),
3422 sock->user_data, NULL);
3424 silc_free(client_id);
3428 client->data.registered = TRUE;
3431 silc_free(client_id);
3433 if (!silc_server_client_on_channel(client, channel)) {
3434 /* Client was not on the channel, add it. */
3435 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3436 chl->client = client;
3438 chl->channel = channel;
3439 silc_list_add(channel->user_list, chl);
3440 silc_list_add(client->channels, chl);
3445 /* Lookups route to the client indicated by the `id_data'. The connection
3446 object and internal data object is returned. Returns NULL if route
3447 could not be found to the client. If the `client_id' is specified then
3448 it is used and the `id_data' is ignored. */
3450 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3451 unsigned char *id_data,
3453 SilcClientID *client_id,
3454 SilcIDListData *idata)
3457 SilcClientEntry client;
3459 SILC_LOG_DEBUG(("Start"));
3461 /* Decode destination Client ID */
3463 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3465 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3469 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3472 /* If the destination belongs to our server we don't have to route
3473 the packet anywhere but to send it to the local destination. */
3474 client = silc_idlist_find_client_by_id(server->local_list, id, NULL);
3478 if (client && client->data.registered == FALSE)
3481 /* If we are router and the client has router then the client is in
3482 our cell but not directly connected to us. */
3483 if (server->server_type == SILC_ROUTER && client->router) {
3484 /* We are of course in this case the client's router thus the real
3485 "router" of the client is the server who owns the client. Thus
3486 we will send the packet to that server. */
3488 *idata = (SilcIDListData)client->router;
3489 return client->router->connection;
3492 /* Seems that client really is directly connected to us */
3494 *idata = (SilcIDListData)client;
3495 return client->connection;
3498 /* Destination belongs to someone not in this server. If we are normal
3499 server our action is to send the packet to our router. */
3500 if (server->server_type == SILC_SERVER && !server->standalone) {
3503 *idata = (SilcIDListData)server->router;
3504 return server->router->connection;
3507 /* We are router and we will perform route lookup for the destination
3508 and send the packet to fastest route. */
3509 if (server->server_type == SILC_ROUTER && !server->standalone) {
3510 /* Check first that the ID is valid */
3511 client = silc_idlist_find_client_by_id(server->global_list, id, NULL);
3513 SilcSocketConnection dst_sock;
3515 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3519 *idata = (SilcIDListData)dst_sock->user_data;
3528 /* Encodes and returns channel list of channels the `client' has joined.
3529 Secret channels are not put to the list. */
3531 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3532 SilcClientEntry client)
3534 SilcBuffer buffer = NULL;
3535 SilcChannelEntry channel;
3536 SilcChannelClientEntry chl;
3541 silc_list_start(client->channels);
3542 while ((chl = silc_list_get(client->channels)) != SILC_LIST_END) {
3543 channel = chl->channel;
3545 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3548 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3549 name_len = strlen(channel->channel_name);
3551 len = 4 + name_len + SILC_ID_CHANNEL_LEN + 4;
3552 buffer = silc_buffer_realloc(buffer,
3553 (buffer ? (buffer)->truelen + len : len));
3554 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3555 silc_buffer_format(buffer,
3556 SILC_STR_UI_SHORT(name_len),
3557 SILC_STR_UI_XNSTRING(channel->channel_name,
3559 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3560 SILC_STR_UI_XNSTRING(cid, SILC_ID_CHANNEL_LEN),
3561 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3563 silc_buffer_pull(buffer, len);
3568 silc_buffer_push(buffer, buffer->data - buffer->head);
3573 /* Finds client entry by Client ID and if it is not found then resolves
3574 it using WHOIS command. */
3576 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3577 SilcClientID *client_id)
3579 SilcClientEntry client;
3581 client = silc_idlist_find_client_by_id(server->local_list, client_id, NULL);
3583 client = silc_idlist_find_client_by_id(server->global_list,
3585 if (!client && server->server_type == SILC_ROUTER)
3589 if (!client && server->standalone)
3592 if (!client || !client->nickname || !client->username) {
3593 SilcBuffer buffer, idp;
3595 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3596 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3597 ++server->cmd_ident, 1,
3598 3, idp->data, idp->len);
3599 silc_server_packet_send(server, client ? client->router->connection :
3600 server->router->connection,
3601 SILC_PACKET_COMMAND, 0,
3602 buffer->data, buffer->len, FALSE);
3603 silc_buffer_free(idp);
3604 silc_buffer_free(buffer);
3610 /* A timeout callback for the re-key. We will be the initiator of the
3613 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3615 SilcSocketConnection sock = (SilcSocketConnection)context;
3616 SilcIDListData idata = (SilcIDListData)sock->user_data;
3617 SilcServer server = (SilcServer)idata->rekey->context;
3618 SilcProtocol protocol;
3619 SilcServerRekeyInternalContext *proto_ctx;
3621 SILC_LOG_DEBUG(("Start"));
3623 /* Allocate internal protocol context. This is sent as context
3625 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3626 proto_ctx->server = (void *)server;
3627 proto_ctx->sock = sock;
3628 proto_ctx->responder = FALSE;
3629 proto_ctx->pfs = idata->rekey->pfs;
3631 /* Perform rekey protocol. Will call the final callback after the
3632 protocol is over. */
3633 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3634 &protocol, proto_ctx, silc_server_rekey_final);
3635 sock->protocol = protocol;
3637 /* Run the protocol */
3638 protocol->execute(server->timeout_queue, 0, protocol,
3641 /* Re-register re-key timeout */
3642 silc_task_register(server->timeout_queue, sock->sock,
3643 silc_server_rekey_callback,
3644 context, idata->rekey->timeout, 0,
3645 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
3648 /* The final callback for the REKEY protocol. This will actually take the
3649 new key material into use. */
3651 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
3653 SilcProtocol protocol = (SilcProtocol)context;
3654 SilcServerRekeyInternalContext *ctx =
3655 (SilcServerRekeyInternalContext *)protocol->context;
3656 SilcServer server = (SilcServer)ctx->server;
3657 SilcSocketConnection sock = ctx->sock;
3659 SILC_LOG_DEBUG(("Start"));
3661 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
3662 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
3663 /* Error occured during protocol */
3664 silc_protocol_cancel(server->timeout_queue, protocol);
3665 silc_protocol_free(protocol);
3666 sock->protocol = NULL;
3668 silc_packet_context_free(ctx->packet);
3670 silc_ske_free(ctx->ske);
3675 /* Take the keys into use */
3676 if (ctx->pfs == TRUE)
3677 silc_server_protocol_rekey_generate_pfs(server, ctx);
3679 silc_server_protocol_rekey_generate(server, ctx);
3682 silc_protocol_free(protocol);
3683 sock->protocol = NULL;
3685 silc_packet_context_free(ctx->packet);
3687 silc_ske_free(ctx->ske);