5 Author: Pekka Riikonen <priikone@silcnet.org>
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 silc_pkcs_free(server->pkcs);
91 while ((sim = silc_dlist_get(server->sim)) != SILC_LIST_END) {
92 silc_dlist_del(server->sim, sim);
95 silc_dlist_uninit(server->sim);
99 silc_free(server->params);
101 if (server->pending_commands)
102 silc_dlist_uninit(server->pending_commands);
108 /* Initializes the entire SILC server. This is called always before running
109 the server. This is called only once at the initialization of the program.
110 This binds the server to its listenning port. After this function returns
111 one should call silc_server_run to start the server. This returns TRUE
112 when everything is ok to run the server. Configuration file must be
113 read and parsed before calling this. */
115 int silc_server_init(SilcServer server)
117 int *sock = NULL, sock_count = 0, i;
119 SilcServerEntry id_entry;
120 SilcIDListPurge purge;
121 SilcServerConfigSectionListenPort *listen;
123 SILC_LOG_DEBUG(("Initializing server"));
125 assert(server->config);
127 /* Set public and private keys */
128 if (!server->config->server_keys ||
129 !server->config->server_keys->public_key ||
130 !server->config->server_keys->private_key) {
131 SILC_LOG_ERROR(("Server public key and/or private key does not exist"));
134 server->public_key = server->config->server_keys->public_key;
135 server->private_key = server->config->server_keys->private_key;
137 /* XXX After server is made as Silc Server Library this can be given
138 as argument, for now this is hard coded */
139 server->params = silc_calloc(1, sizeof(*server->params));
140 server->params->retry_count = SILC_SERVER_RETRY_COUNT;
141 server->params->retry_interval_min = SILC_SERVER_RETRY_INTERVAL_MIN;
142 server->params->retry_interval_max = SILC_SERVER_RETRY_INTERVAL_MAX;
143 server->params->retry_keep_trying = FALSE;
144 server->params->protocol_timeout = 60;
145 server->params->require_reverse_mapping = FALSE;
147 /* Set log files where log message should be saved. */
148 server->config->server = server;
149 silc_server_config_setlogfiles(server->config);
151 /* Register all configured ciphers, PKCS and hash functions. */
152 if (!silc_server_config_register_ciphers(server->config))
153 silc_cipher_register_default();
154 if (!silc_server_config_register_pkcs(server->config))
155 silc_pkcs_register_default();
156 if (!silc_server_config_register_hashfuncs(server->config))
157 silc_hash_register_default();
158 if (!silc_server_config_register_hmacs(server->config))
159 silc_hmac_register_default();
161 /* Initialize random number generator for the server. */
162 server->rng = silc_rng_alloc();
163 silc_rng_init(server->rng);
164 silc_rng_global_init(server->rng);
166 /* Initialize hash functions for server to use */
167 silc_hash_alloc("md5", &server->md5hash);
168 silc_hash_alloc("sha1", &server->sha1hash);
170 /* Initialize none cipher */
171 silc_cipher_alloc("none", &server->none_cipher);
173 /* Allocate PKCS context for local public and private keys */
174 silc_pkcs_alloc(server->public_key->name, &server->pkcs);
175 silc_pkcs_public_key_set(server->pkcs, server->public_key);
176 silc_pkcs_private_key_set(server->pkcs, server->private_key);
178 /* Create a listening server. Note that our server can listen on multiple
179 ports. All listeners are created here and now. */
181 listen = server->config->listen_port;
185 tmp = silc_net_create_server(server->config->listen_port->port,
186 server->config->listen_port->listener_ip);
190 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
191 sock[sock_count] = tmp;
193 listen = listen->next;
196 /* Initialize ID caches */
197 server->local_list->clients =
198 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
199 server->local_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
200 server->local_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
202 /* These are allocated for normal server as well as these hold some
203 global information that the server has fetched from its router. For
204 router these are used as they are supposed to be used on router. */
205 server->global_list->clients =
206 silc_idcache_alloc(0, SILC_ID_CLIENT, silc_idlist_client_destructor);
207 server->global_list->servers = silc_idcache_alloc(0, SILC_ID_SERVER, NULL);
208 server->global_list->channels = silc_idcache_alloc(0, SILC_ID_CHANNEL, NULL);
210 /* Allocate the entire socket list that is used in server. Eventually
211 all connections will have entry in this table (it is a table of
212 pointers to the actual object that is allocated individually
214 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
215 sizeof(*server->sockets));
217 for (i = 0; i < sock_count; i++) {
218 SilcSocketConnection newsocket = NULL;
220 /* Set socket to non-blocking mode */
221 silc_net_set_socket_nonblock(sock[i]);
222 server->sock = sock[i];
224 /* Create a Server ID for the server. */
225 silc_id_create_server_id(sock[i], server->rng, &id);
231 server->id_string = silc_id_id2str(id, SILC_ID_SERVER);
232 server->id_string_len = silc_id_get_len(id, SILC_ID_SERVER);
233 server->id_type = SILC_ID_SERVER;
234 server->server_name = server->config->server_info->server_name;
236 /* Add ourselves to the server list. We don't have a router yet
237 beacuse we haven't established a route yet. It will be done later.
238 For now, NULL is sent as router. This allocates new entry to
241 silc_idlist_add_server(server->local_list,
242 server->config->server_info->server_name,
243 server->server_type, server->id, NULL, NULL);
245 SILC_LOG_ERROR(("Could not add ourselves to cache"));
248 id_entry->data.status |= SILC_IDLIST_STATUS_REGISTERED;
250 /* Add ourselves also to the socket table. The entry allocated above
251 is sent as argument for fast referencing in the future. */
252 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
255 server->sockets[sock[i]] = newsocket;
257 /* Perform name and address lookups to resolve the listenning address
259 if (!silc_net_check_local_by_sock(sock[i], &newsocket->hostname,
261 if ((server->params->require_reverse_mapping && !newsocket->hostname) ||
263 SILC_LOG_ERROR(("IP/DNS lookup failed for local host %s",
264 newsocket->hostname ? newsocket->hostname :
265 newsocket->ip ? newsocket->ip : ""));
266 server->stat.conn_failures++;
269 if (!newsocket->hostname)
270 newsocket->hostname = strdup(newsocket->ip);
272 newsocket->port = silc_net_get_local_port(sock[i]);
274 /* Put the allocated socket pointer also to the entry allocated above
275 for fast back-referencing to the socket list. */
276 id_entry->connection = (void *)server->sockets[sock[i]];
277 server->id_entry = id_entry;
280 /* Register protocols */
281 silc_server_protocols_register();
283 /* Initialize the scheduler. */
284 server->schedule = silc_schedule_init(SILC_SERVER_MAX_CONNECTIONS);
285 if (!server->schedule)
288 /* Add the first task to the scheduler. This is task that is executed by
289 timeout. It expires as soon as the caller calls silc_server_run. This
290 task performs authentication protocol and key exchange with our
292 silc_schedule_task_add(server->schedule, sock[0],
293 silc_server_connect_to_router,
294 (void *)server, 0, 1,
296 SILC_TASK_PRI_NORMAL);
298 /* Add listener task to the scheduler. This task receives new connections
299 to the server. This task remains on the queue until the end of the
301 silc_schedule_task_add(server->schedule, sock[0],
302 silc_server_accept_new_connection,
303 (void *)server, 0, 0,
305 SILC_TASK_PRI_NORMAL);
306 server->listenning = TRUE;
308 /* If server connections has been configured then we must be router as
309 normal server cannot have server connections, only router connections. */
310 if (server->config->servers)
311 server->server_type = SILC_ROUTER;
313 /* Register the ID Cache purge task. This periodically purges the ID cache
314 and removes the expired cache entries. */
316 /* Clients local list */
317 purge = silc_calloc(1, sizeof(*purge));
318 purge->cache = server->local_list->clients;
319 purge->schedule = server->schedule;
320 silc_schedule_task_add(purge->schedule, 0,
322 (void *)purge, 600, 0,
323 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
325 /* Clients global list */
326 purge = silc_calloc(1, sizeof(*purge));
327 purge->cache = server->global_list->clients;
328 purge->schedule = server->schedule;
329 silc_schedule_task_add(purge->schedule, 0,
331 (void *)purge, 300, 0,
332 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
334 SILC_LOG_DEBUG(("Server initialized"));
336 /* We are done here, return succesfully */
340 for (i = 0; i < sock_count; i++)
341 silc_net_close_server(sock[i]);
346 /* Fork server to background and set gid+uid to non-root.
347 Silcd will not run as root, so trying to set either user or group to
348 root will cause silcd to exit. */
350 void silc_server_daemonise(SilcServer server)
352 /* Are we executing silcd as root or a regular user? */
359 if (!server->config->identity || !server->config->identity->user ||
360 !server->config->identity->group) {
361 fprintf(stderr, "Error:"
362 "\tSILC server must not be run as root. For the security of your\n"
363 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
364 "\tuser account. Modify the [Identity] configuration section to run\n"
365 "\tthe server as non-root user.\n");
369 /* Get the values given for user and group in configuration file */
370 user=server->config->identity->user;
371 group=server->config->identity->group;
373 /* Check whether the user/group information is text */
374 if (atoi(user)!=0 || atoi(group)!=0) {
375 SILC_LOG_DEBUG(("Invalid user and/or group information"));
376 SILC_LOG_DEBUG(("User and/or group given as number"));
377 fprintf(stderr, "Invalid user and/or group information\n");
378 fprintf(stderr, "Please assign them as names, not numbers\n");
382 /* Catch the nasty incident of string "0" returning 0 from atoi */
383 if (strcmp("0", user)==0 || strcmp("0", group)==0) {
384 SILC_LOG_DEBUG(("User and/or group configured to 0. Unacceptable"));
385 fprintf(stderr, "User and/or group configured to 0. Exiting\n");
393 fprintf(stderr, "No such user %s found\n", user);
398 fprintf(stderr, "No such group %s found\n", group);
402 /* Check whether user and/or group is set to root. If yes, exit
403 immediately. Otherwise, setgid and setuid server to user.group */
404 if (gr->gr_gid==0 || pw->pw_uid==0) {
405 fprintf(stderr, "Error:"
406 "\tSILC server must not be run as root. For the security of your\n"
407 "\tsystem it is strongly suggested that you run SILC under dedicated\n"
408 "\tuser account. Modify the [Identity] configuration section to run\n"
409 "\tthe server as non-root user.\n");
412 /* Fork server to background, making it a daemon */
414 SILC_LOG_DEBUG(("Server started as root. Dropping privileges."));
415 SILC_LOG_DEBUG(("Forking SILC server to background"));
420 SILC_LOG_DEBUG(("Changing to group %s", group));
421 if(setgid(gr->gr_gid)==0) {
422 SILC_LOG_DEBUG(("Setgid to %s", group));
424 SILC_LOG_DEBUG(("Setgid to %s failed", group));
425 fprintf(stderr, "Tried to setgid %s but no such group. Exiting\n",
429 SILC_LOG_DEBUG(("Changing to user nobody"));
430 if(setuid(pw->pw_uid)==0) {
431 SILC_LOG_DEBUG(("Setuid to %s", user));
433 SILC_LOG_DEBUG(("Setuid to %s failed", user));
434 fprintf(stderr, "Tried to setuid %s but no such user. Exiting\n",
440 /* Fork server to background, making it a daemon */
442 SILC_LOG_DEBUG(("Server started as user"));
443 SILC_LOG_DEBUG(("Forking SILC server to background"));
450 /* Stops the SILC server. This function is used to shutdown the server.
451 This is usually called after the scheduler has returned. After stopping
452 the server one should call silc_server_free. */
454 void silc_server_stop(SilcServer server)
456 SILC_LOG_DEBUG(("Stopping server"));
458 silc_schedule_stop(server->schedule);
459 silc_schedule_uninit(server->schedule);
461 silc_server_protocols_unregister();
463 SILC_LOG_DEBUG(("Server stopped"));
466 /* The heart of the server. This runs the scheduler thus runs the server.
467 When this returns the server has been stopped and the program will
470 void silc_server_run(SilcServer server)
472 SILC_LOG_DEBUG(("Running server"));
474 SILC_LOG_INFO(("SILC Server started"));
476 /* Start the scheduler, the heart of the SILC server. When this returns
477 the program will be terminated. */
478 silc_schedule(server->schedule);
481 /* Timeout callback that will be called to retry connecting to remote
482 router. This is used by both normal and router server. This will wait
483 before retrying the connecting. The timeout is generated by exponential
484 backoff algorithm. */
486 SILC_TASK_CALLBACK(silc_server_connect_to_router_retry)
488 SilcServerConnection sconn = (SilcServerConnection)context;
489 SilcServer server = sconn->server;
491 SILC_LOG_INFO(("Retrying connecting to a router"));
493 /* Calculate next timeout */
494 if (sconn->retry_count >= 1) {
495 sconn->retry_timeout = sconn->retry_timeout * SILC_SERVER_RETRY_MULTIPLIER;
496 if (sconn->retry_timeout > SILC_SERVER_RETRY_INTERVAL_MAX)
497 sconn->retry_timeout = SILC_SERVER_RETRY_INTERVAL_MAX;
499 sconn->retry_timeout = server->params->retry_interval_min;
501 sconn->retry_count++;
502 sconn->retry_timeout = sconn->retry_timeout +
503 silc_rng_get_rn32(server->rng) % SILC_SERVER_RETRY_RANDOMIZER;
505 /* If we've reached max retry count, give up. */
506 if (sconn->retry_count > server->params->retry_count &&
507 server->params->retry_keep_trying == FALSE) {
508 SILC_LOG_ERROR(("Could not connect to router, giving up"));
512 /* Wait one before retrying */
513 silc_schedule_task_add(server->schedule, fd, silc_server_connect_router,
514 context, sconn->retry_timeout,
515 server->params->retry_interval_min_usec,
516 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
519 /* Generic routine to use connect to a router. */
521 SILC_TASK_CALLBACK(silc_server_connect_router)
523 SilcServerConnection sconn = (SilcServerConnection)context;
524 SilcServer server = sconn->server;
525 SilcSocketConnection newsocket;
526 SilcProtocol protocol;
527 SilcServerKEInternalContext *proto_ctx;
530 SILC_LOG_INFO(("Connecting to the router %s on port %d",
531 sconn->remote_host, sconn->remote_port));
533 /* Connect to remote host */
534 sock = silc_net_create_connection(server->config->listen_port->local_ip,
538 SILC_LOG_ERROR(("Could not connect to router"));
539 silc_schedule_task_add(server->schedule, fd,
540 silc_server_connect_to_router_retry,
541 context, 0, 1, SILC_TASK_TIMEOUT,
542 SILC_TASK_PRI_NORMAL);
546 /* Set socket options */
547 silc_net_set_socket_nonblock(sock);
548 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
550 /* Create socket connection for the connection. Even though we
551 know that we are connecting to a router we will mark the socket
552 to be unknown connection until we have executed authentication
554 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
555 server->sockets[sock] = newsocket;
556 newsocket->hostname = strdup(sconn->remote_host);
557 newsocket->ip = strdup(sconn->remote_host);
558 newsocket->port = sconn->remote_port;
559 sconn->sock = newsocket;
561 /* Allocate internal protocol context. This is sent as context
563 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
564 proto_ctx->server = (void *)server;
565 proto_ctx->context = (void *)sconn;
566 proto_ctx->sock = newsocket;
567 proto_ctx->rng = server->rng;
568 proto_ctx->responder = FALSE;
570 /* Perform key exchange protocol. silc_server_connect_to_router_second
571 will be called after the protocol is finished. */
572 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
573 &protocol, proto_ctx,
574 silc_server_connect_to_router_second);
575 newsocket->protocol = protocol;
577 /* Register a timeout task that will be executed if the protocol
578 is not executed within set limit. */
579 proto_ctx->timeout_task =
580 silc_schedule_task_add(server->schedule, sock,
581 silc_server_timeout_remote,
582 server, server->params->protocol_timeout,
583 server->params->protocol_timeout_usec,
587 /* Register the connection for network input and output. This sets
588 that scheduler will listen for incoming packets for this connection
589 and sets that outgoing packets may be sent to this connection as
590 well. However, this doesn't set the scheduler for outgoing traffic,
591 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
592 later when outgoing data is available. */
593 context = (void *)server;
594 SILC_REGISTER_CONNECTION_FOR_IO(sock);
596 /* Run the protocol */
597 silc_protocol_execute(protocol, server->schedule, 0, 0);
600 /* This function connects to our primary router or if we are a router this
601 establishes all our primary routes. This is called at the start of the
602 server to do authentication and key exchange with our router - called
605 SILC_TASK_CALLBACK(silc_server_connect_to_router)
607 SilcServer server = (SilcServer)context;
608 SilcServerConnection sconn;
610 SILC_LOG_DEBUG(("Connecting to router(s)"));
612 /* If we are normal SILC server we need to connect to our cell's
614 if (server->server_type == SILC_SERVER) {
615 SILC_LOG_DEBUG(("We are normal server"));
617 /* Create connection to the router, if configured. */
618 if (server->config->routers) {
620 /* Allocate connection object for hold connection specific stuff. */
621 sconn = silc_calloc(1, sizeof(*sconn));
622 sconn->server = server;
623 sconn->remote_host = strdup(server->config->routers->host);
624 sconn->remote_port = server->config->routers->port;
626 silc_schedule_task_add(server->schedule, fd,
627 silc_server_connect_router,
628 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
629 SILC_TASK_PRI_NORMAL);
634 /* If we are a SILC router we need to establish all of our primary
636 if (server->server_type == SILC_ROUTER) {
637 SilcServerConfigSectionServerConnection *ptr;
639 SILC_LOG_DEBUG(("We are router"));
641 /* Create the connections to all our routes */
642 ptr = server->config->routers;
645 SILC_LOG_DEBUG(("Router connection [%s] %s:%d",
646 ptr->initiator ? "Initiator" : "Responder",
647 ptr->host, ptr->port));
649 if (ptr->initiator) {
650 /* Allocate connection object for hold connection specific stuff. */
651 sconn = silc_calloc(1, sizeof(*sconn));
652 sconn->server = server;
653 sconn->remote_host = strdup(ptr->host);
654 sconn->remote_port = ptr->port;
656 silc_schedule_task_add(server->schedule, fd,
657 silc_server_connect_router,
658 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
659 SILC_TASK_PRI_NORMAL);
669 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
671 /* There wasn't a configured router, we will continue but we don't
672 have a connection to outside world. We will be standalone server. */
673 server->standalone = TRUE;
676 /* Second part of connecting to router(s). Key exchange protocol has been
677 executed and now we will execute authentication protocol. */
679 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
681 SilcProtocol protocol = (SilcProtocol)context;
682 SilcServerKEInternalContext *ctx =
683 (SilcServerKEInternalContext *)protocol->context;
684 SilcServer server = (SilcServer)ctx->server;
685 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
686 SilcSocketConnection sock = ctx->sock;
687 SilcServerConnAuthInternalContext *proto_ctx;
688 SilcServerConfigSectionServerConnection *conn = NULL;
690 SILC_LOG_DEBUG(("Start"));
692 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
693 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
694 /* Error occured during protocol */
695 silc_protocol_free(protocol);
696 sock->protocol = NULL;
697 silc_ske_free_key_material(ctx->keymat);
699 silc_packet_context_free(ctx->packet);
701 silc_ske_free(ctx->ske);
703 silc_free(ctx->dest_id);
705 silc_schedule_task_del_by_callback(server->schedule,
706 silc_server_failure_callback);
707 silc_server_disconnect_remote(server, sock, "Server closed connection: "
708 "Key exchange failed");
712 /* We now have the key material as the result of the key exchange
713 protocol. Take the key material into use. Free the raw key material
714 as soon as we've set them into use. */
715 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
716 ctx->ske->prop->cipher,
717 ctx->ske->prop->pkcs,
718 ctx->ske->prop->hash,
719 ctx->ske->prop->hmac,
720 ctx->ske->prop->group,
722 silc_protocol_free(protocol);
723 sock->protocol = NULL;
724 silc_ske_free_key_material(ctx->keymat);
726 silc_packet_context_free(ctx->packet);
728 silc_ske_free(ctx->ske);
730 silc_free(ctx->dest_id);
732 silc_schedule_task_del_by_callback(server->schedule,
733 silc_server_failure_callback);
734 silc_server_disconnect_remote(server, sock, "Server closed connection: "
735 "Key exchange failed");
738 silc_ske_free_key_material(ctx->keymat);
740 /* Allocate internal context for the authentication protocol. This
741 is sent as context for the protocol. */
742 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
743 proto_ctx->server = (void *)server;
744 proto_ctx->context = (void *)sconn;
745 proto_ctx->sock = sock;
746 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
747 proto_ctx->dest_id_type = ctx->dest_id_type;
748 proto_ctx->dest_id = ctx->dest_id;
750 /* Resolve the authentication method used in this connection. Check if
751 we find a match from user configured connections */
752 conn = silc_server_config_find_router_conn(server->config,
756 /* Match found. Use the configured authentication method */
757 proto_ctx->auth_meth = conn->auth_meth;
758 if (conn->auth_data) {
759 proto_ctx->auth_data = strdup(conn->auth_data);
760 proto_ctx->auth_data_len = strlen(conn->auth_data);
763 SILC_LOG_ERROR(("Could not find connection data for %s (%s) on port",
764 sock->hostname, sock->ip, sock->port));
765 silc_protocol_free(protocol);
766 sock->protocol = NULL;
768 silc_packet_context_free(ctx->packet);
770 silc_ske_free(ctx->ske);
772 silc_free(ctx->dest_id);
774 silc_schedule_task_del_by_callback(server->schedule,
775 silc_server_failure_callback);
776 silc_server_disconnect_remote(server, sock, "Server closed connection: "
777 "Key exchange failed");
781 /* Free old protocol as it is finished now */
782 silc_protocol_free(protocol);
784 silc_packet_context_free(ctx->packet);
786 sock->protocol = NULL;
788 /* Allocate the authentication protocol. This is allocated here
789 but we won't start it yet. We will be receiving party of this
790 protocol thus we will wait that connecting party will make
792 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
793 &sock->protocol, proto_ctx,
794 silc_server_connect_to_router_final);
796 /* Register timeout task. If the protocol is not executed inside
797 this timelimit the connection will be terminated. Currently
798 this is 15 seconds and is hard coded limit (XXX). */
799 proto_ctx->timeout_task =
800 silc_schedule_task_add(server->schedule, sock->sock,
801 silc_server_timeout_remote,
802 (void *)server, 15, 0,
806 /* Run the protocol */
807 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
810 /* Finalizes the connection to router. Registers a server task to the
811 queue so that we can accept new connections. */
813 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
815 SilcProtocol protocol = (SilcProtocol)context;
816 SilcServerConnAuthInternalContext *ctx =
817 (SilcServerConnAuthInternalContext *)protocol->context;
818 SilcServer server = (SilcServer)ctx->server;
819 SilcServerConnection sconn = (SilcServerConnection)ctx->context;
820 SilcSocketConnection sock = ctx->sock;
821 SilcServerEntry id_entry;
823 SilcServerHBContext hb_context;
824 unsigned char *id_string;
826 SilcIDListData idata;
828 SILC_LOG_DEBUG(("Start"));
830 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
831 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
832 /* Error occured during protocol */
834 silc_free(ctx->dest_id);
835 silc_server_disconnect_remote(server, sock, "Server closed connection: "
836 "Authentication failed");
840 /* Add a task to the queue. This task receives new connections to the
841 server. This task remains on the queue until the end of the program. */
842 if (!server->listenning) {
843 silc_schedule_task_add(server->schedule, server->sock,
844 silc_server_accept_new_connection,
845 (void *)server, 0, 0,
847 SILC_TASK_PRI_NORMAL);
848 server->listenning = TRUE;
851 /* Send NEW_SERVER packet to the router. We will become registered
852 to the SILC network after sending this packet. */
853 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
854 id_len = silc_id_get_len(server->id, SILC_ID_SERVER);
855 packet = silc_buffer_alloc(2 + 2 + id_len + strlen(server->server_name));
856 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
857 silc_buffer_format(packet,
858 SILC_STR_UI_SHORT(id_len),
859 SILC_STR_UI_XNSTRING(id_string, id_len),
860 SILC_STR_UI_SHORT(strlen(server->server_name)),
861 SILC_STR_UI_XNSTRING(server->server_name,
862 strlen(server->server_name)),
865 /* Send the packet */
866 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
867 packet->data, packet->len, TRUE);
868 silc_buffer_free(packet);
869 silc_free(id_string);
871 SILC_LOG_INFO(("Connected to router %s", sock->hostname));
873 /* Add the connected router to local server list */
874 server->standalone = FALSE;
875 id_entry = silc_idlist_add_server(server->local_list, strdup(sock->hostname),
876 SILC_ROUTER, ctx->dest_id, NULL, sock);
879 silc_free(ctx->dest_id);
880 silc_server_disconnect_remote(server, sock, "Server closed connection: "
881 "Authentication failed");
885 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
886 silc_free(sock->user_data);
887 sock->user_data = (void *)id_entry;
888 sock->type = SILC_SOCKET_TYPE_ROUTER;
889 server->id_entry->router = id_entry;
890 server->router = id_entry;
891 idata = (SilcIDListData)sock->user_data;
892 idata->status |= SILC_IDLIST_STATUS_REGISTERED;
894 /* Perform keepalive. The `hb_context' will be freed automatically
895 when finally calling the silc_socket_free function. XXX hardcoded
897 hb_context = silc_calloc(1, sizeof(*hb_context));
898 hb_context->server = server;
899 silc_socket_set_heartbeat(sock, 600, hb_context,
900 silc_server_perform_heartbeat,
903 /* Register re-key timeout */
904 idata->rekey->timeout = 3600; /* XXX hardcoded */
905 idata->rekey->context = (void *)server;
906 silc_schedule_task_add(server->schedule, sock->sock,
907 silc_server_rekey_callback,
908 (void *)sock, idata->rekey->timeout, 0,
909 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
911 /* If we are router then announce our possible servers. */
912 if (server->server_type == SILC_ROUTER)
913 silc_server_announce_servers(server);
915 /* Announce our clients and channels to the router */
916 silc_server_announce_clients(server);
917 silc_server_announce_channels(server);
920 /* Free the temporary connection data context */
922 silc_free(sconn->remote_host);
926 /* Free the protocol object */
927 silc_protocol_free(protocol);
929 silc_packet_context_free(ctx->packet);
931 silc_ske_free(ctx->ske);
933 sock->protocol = NULL;
936 /* Host lookup callbcak that is called after the incoming connection's
937 IP and FQDN lookup is performed. This will actually check the acceptance
938 of the incoming connection and will register the key exchange protocol
939 for this connection. */
942 silc_server_accept_new_connection_lookup(SilcSocketConnection sock,
945 SilcServer server = (SilcServer)context;
946 SilcServerKEInternalContext *proto_ctx;
947 void *cconfig, *sconfig, *rconfig;
948 SilcServerConfigSectionDenyConnection *deny;
951 SILC_LOG_DEBUG(("Start"));
953 /* Check whether we could resolve both IP and FQDN. */
954 if (!sock->ip || (!strcmp(sock->ip, sock->hostname) &&
955 server->params->require_reverse_mapping)) {
956 SILC_LOG_ERROR(("IP/DNS lookup failed %s",
957 sock->hostname ? sock->hostname :
958 sock->ip ? sock->ip : ""));
959 server->stat.conn_failures++;
960 silc_server_disconnect_remote(server, sock,
961 "Server closed connection: Unknown host");
965 /* Register the connection for network input and output. This sets
966 that scheduler will listen for incoming packets for this connection
967 and sets that outgoing packets may be sent to this connection as well.
968 However, this doesn't set the scheduler for outgoing traffic, it
969 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
970 later when outgoing data is available. */
971 SILC_REGISTER_CONNECTION_FOR_IO(sock->sock);
973 SILC_LOG_INFO(("Incoming connection from %s (%s)", sock->hostname,
976 port = server->sockets[server->sock]->port; /* Listenning port */
978 /* Check whether this connection is denied to connect to us. */
979 deny = silc_server_config_denied_conn(server->config, sock->ip, port);
981 deny = silc_server_config_denied_conn(server->config, sock->hostname,
984 /* The connection is denied */
985 SILC_LOG_INFO(("Connection %s (%s) is denied",
986 sock->hostname, sock->ip));
987 silc_server_disconnect_remote(server, sock, deny->comment ?
989 "Server closed connection: "
990 "Connection refused");
991 server->stat.conn_failures++;
995 /* Check whether we have configred this sort of connection at all. We
996 have to check all configurations since we don't know what type of
997 connection this is. */
998 if (!(cconfig = silc_server_config_find_client_conn(server->config,
1000 cconfig = silc_server_config_find_client_conn(server->config,
1003 if (!(sconfig = silc_server_config_find_server_conn(server->config,
1006 sconfig = silc_server_config_find_server_conn(server->config,
1009 if (!(rconfig = silc_server_config_find_router_conn(server->config,
1011 rconfig = silc_server_config_find_router_conn(server->config,
1014 if (!cconfig && !sconfig && !rconfig) {
1015 silc_server_disconnect_remote(server, sock,
1016 "Server closed connection: "
1017 "Connection refused");
1018 server->stat.conn_failures++;
1022 /* The connection is allowed */
1024 /* Allocate internal context for key exchange protocol. This is
1025 sent as context for the protocol. */
1026 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1027 proto_ctx->server = context;
1028 proto_ctx->sock = sock;
1029 proto_ctx->rng = server->rng;
1030 proto_ctx->responder = TRUE;
1031 proto_ctx->cconfig = cconfig;
1032 proto_ctx->sconfig = sconfig;
1033 proto_ctx->rconfig = rconfig;
1035 /* Prepare the connection for key exchange protocol. We allocate the
1036 protocol but will not start it yet. The connector will be the
1037 initiator of the protocol thus we will wait for initiation from
1038 there before we start the protocol. */
1039 server->stat.auth_attempts++;
1040 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
1041 &sock->protocol, proto_ctx,
1042 silc_server_accept_new_connection_second);
1044 /* Register a timeout task that will be executed if the connector
1045 will not start the key exchange protocol within 60 seconds. For
1046 now, this is a hard coded limit. After 60 secs the connection will
1047 be closed if the key exchange protocol has not been started. */
1048 proto_ctx->timeout_task =
1049 silc_schedule_task_add(server->schedule, sock->sock,
1050 silc_server_timeout_remote,
1056 /* Accepts new connections to the server. Accepting new connections are
1057 done in three parts to make it async. */
1059 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
1061 SilcServer server = (SilcServer)context;
1062 SilcSocketConnection newsocket;
1065 SILC_LOG_DEBUG(("Accepting new connection"));
1067 server->stat.conn_attempts++;
1069 sock = silc_net_accept_connection(server->sock);
1071 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
1072 server->stat.conn_failures++;
1076 /* Check max connections */
1077 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
1078 SILC_LOG_ERROR(("Refusing connection, server is full"));
1079 server->stat.conn_failures++;
1083 /* Set socket options */
1084 silc_net_set_socket_nonblock(sock);
1085 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
1087 /* We don't create a ID yet, since we don't know what type of connection
1088 this is yet. But, we do add the connection to the socket table. */
1089 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
1090 server->sockets[sock] = newsocket;
1092 /* Perform asynchronous host lookup. This will lookup the IP and the
1093 FQDN of the remote connection. After the lookup is done the connection
1094 is accepted further. */
1095 silc_socket_host_lookup(newsocket, TRUE,
1096 silc_server_accept_new_connection_lookup, context,
1100 /* Second part of accepting new connection. Key exchange protocol has been
1101 performed and now it is time to do little connection authentication
1102 protocol to figure out whether this connection is client or server
1103 and whether it has right to access this server (especially server
1104 connections needs to be authenticated). */
1106 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
1108 SilcProtocol protocol = (SilcProtocol)context;
1109 SilcServerKEInternalContext *ctx =
1110 (SilcServerKEInternalContext *)protocol->context;
1111 SilcServer server = (SilcServer)ctx->server;
1112 SilcSocketConnection sock = ctx->sock;
1113 SilcServerConnAuthInternalContext *proto_ctx;
1115 SILC_LOG_DEBUG(("Start"));
1117 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1118 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1119 /* Error occured during protocol */
1120 silc_protocol_free(protocol);
1121 sock->protocol = NULL;
1122 silc_ske_free_key_material(ctx->keymat);
1124 silc_packet_context_free(ctx->packet);
1126 silc_ske_free(ctx->ske);
1128 silc_free(ctx->dest_id);
1130 silc_schedule_task_del_by_callback(server->schedule,
1131 silc_server_failure_callback);
1132 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1133 "Key exchange failed");
1134 server->stat.auth_failures++;
1138 /* We now have the key material as the result of the key exchange
1139 protocol. Take the key material into use. Free the raw key material
1140 as soon as we've set them into use. */
1141 if (!silc_server_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
1142 ctx->ske->prop->cipher,
1143 ctx->ske->prop->pkcs,
1144 ctx->ske->prop->hash,
1145 ctx->ske->prop->hmac,
1146 ctx->ske->prop->group,
1148 silc_protocol_free(protocol);
1149 sock->protocol = NULL;
1150 silc_ske_free_key_material(ctx->keymat);
1152 silc_packet_context_free(ctx->packet);
1154 silc_ske_free(ctx->ske);
1156 silc_free(ctx->dest_id);
1158 silc_schedule_task_del_by_callback(server->schedule,
1159 silc_server_failure_callback);
1160 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1161 "Key exchange failed");
1162 server->stat.auth_failures++;
1165 silc_ske_free_key_material(ctx->keymat);
1167 /* Allocate internal context for the authentication protocol. This
1168 is sent as context for the protocol. */
1169 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1170 proto_ctx->server = (void *)server;
1171 proto_ctx->sock = sock;
1172 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
1173 proto_ctx->responder = TRUE;
1174 proto_ctx->dest_id_type = ctx->dest_id_type;
1175 proto_ctx->dest_id = ctx->dest_id;
1176 proto_ctx->cconfig = ctx->cconfig;
1177 proto_ctx->sconfig = ctx->sconfig;
1178 proto_ctx->rconfig = ctx->rconfig;
1180 /* Free old protocol as it is finished now */
1181 silc_protocol_free(protocol);
1183 silc_packet_context_free(ctx->packet);
1185 sock->protocol = NULL;
1187 /* Allocate the authentication protocol. This is allocated here
1188 but we won't start it yet. We will be receiving party of this
1189 protocol thus we will wait that connecting party will make
1190 their first move. */
1191 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
1192 &sock->protocol, proto_ctx,
1193 silc_server_accept_new_connection_final);
1195 /* Register timeout task. If the protocol is not executed inside
1196 this timelimit the connection will be terminated. Currently
1197 this is 60 seconds and is hard coded limit (XXX). */
1198 proto_ctx->timeout_task =
1199 silc_schedule_task_add(server->schedule, sock->sock,
1200 silc_server_timeout_remote,
1201 (void *)server, 60, 0,
1206 /* Final part of accepting new connection. The connection has now
1207 been authenticated and keys has been exchanged. We also know whether
1208 this is client or server connection. */
1210 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
1212 SilcProtocol protocol = (SilcProtocol)context;
1213 SilcServerConnAuthInternalContext *ctx =
1214 (SilcServerConnAuthInternalContext *)protocol->context;
1215 SilcServer server = (SilcServer)ctx->server;
1216 SilcSocketConnection sock = ctx->sock;
1217 SilcServerHBContext hb_context;
1218 SilcUnknownEntry entry = (SilcUnknownEntry)sock->user_data;
1219 void *id_entry = NULL;
1221 SILC_LOG_DEBUG(("Start"));
1223 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1224 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1225 /* Error occured during protocol */
1226 silc_protocol_free(protocol);
1227 sock->protocol = NULL;
1229 silc_packet_context_free(ctx->packet);
1231 silc_ske_free(ctx->ske);
1233 silc_free(ctx->dest_id);
1236 sock->protocol = NULL;
1237 silc_schedule_task_del_by_callback(server->schedule,
1238 silc_server_failure_callback);
1239 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1240 "Authentication failed");
1241 server->stat.auth_failures++;
1245 entry->data.last_receive = time(NULL);
1247 switch (ctx->conn_type) {
1248 case SILC_SOCKET_TYPE_CLIENT:
1250 SilcClientEntry client;
1252 SILC_LOG_DEBUG(("Remote host is client"));
1253 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1256 /* Add the client to the client ID cache. The nickname and Client ID
1257 and other information is created after we have received NEW_CLIENT
1258 packet from client. */
1259 client = silc_idlist_add_client(server->local_list,
1260 NULL, NULL, NULL, NULL, NULL, sock);
1262 SILC_LOG_ERROR(("Could not add new client to cache"));
1263 silc_free(sock->user_data);
1264 silc_server_disconnect_remote(server, sock,
1265 "Server closed connection: "
1266 "Authentication failed");
1267 server->stat.auth_failures++;
1272 server->stat.my_clients++;
1273 server->stat.clients++;
1274 if (server->server_type == SILC_ROUTER)
1275 server->stat.cell_clients++;
1277 id_entry = (void *)client;
1280 case SILC_SOCKET_TYPE_SERVER:
1281 case SILC_SOCKET_TYPE_ROUTER:
1283 SilcServerEntry new_server;
1284 SilcServerConfigSectionServerConnection *conn =
1285 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1286 ctx->sconfig : ctx->rconfig;
1288 SILC_LOG_DEBUG(("Remote host is %s",
1289 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1290 "server" : "router"));
1291 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1292 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1293 "server" : "router"));
1295 /* Add the server into server cache. The server name and Server ID
1296 is updated after we have received NEW_SERVER packet from the
1297 server. We mark ourselves as router for this server if we really
1300 silc_idlist_add_server(server->local_list, NULL,
1301 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1302 SILC_SERVER : SILC_ROUTER, NULL,
1303 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1304 server->id_entry : NULL, sock);
1306 SILC_LOG_ERROR(("Could not add new server to cache"));
1307 silc_free(sock->user_data);
1308 silc_server_disconnect_remote(server, sock,
1309 "Server closed connection: "
1310 "Authentication failed");
1311 server->stat.auth_failures++;
1316 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1317 server->stat.my_servers++;
1319 server->stat.my_routers++;
1320 server->stat.servers++;
1322 id_entry = (void *)new_server;
1324 /* Check whether this connection is to be our primary router connection
1325 if we dont' already have the primary route. */
1326 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1327 if (silc_server_config_is_primary_route(server->config) &&
1331 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1332 server->standalone = FALSE;
1333 if (!server->id_entry->router) {
1334 server->id_entry->router = id_entry;
1335 server->router = id_entry;
1345 sock->type = ctx->conn_type;
1347 /* Add the common data structure to the ID entry. */
1349 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1351 /* Add to sockets internal pointer for fast referencing */
1352 silc_free(sock->user_data);
1353 sock->user_data = id_entry;
1355 /* Connection has been fully established now. Everything is ok. */
1356 SILC_LOG_DEBUG(("New connection authenticated"));
1358 /* Perform keepalive. The `hb_context' will be freed automatically
1359 when finally calling the silc_socket_free function. XXX hardcoded
1361 hb_context = silc_calloc(1, sizeof(*hb_context));
1362 hb_context->server = server;
1363 silc_socket_set_heartbeat(sock, 600, hb_context,
1364 silc_server_perform_heartbeat,
1368 silc_schedule_task_del_by_callback(server->schedule,
1369 silc_server_failure_callback);
1370 silc_protocol_free(protocol);
1372 silc_packet_context_free(ctx->packet);
1374 silc_ske_free(ctx->ske);
1376 silc_free(ctx->dest_id);
1378 sock->protocol = NULL;
1381 /* This function is used to read packets from network and send packets to
1382 network. This is usually a generic task. */
1384 SILC_TASK_CALLBACK(silc_server_packet_process)
1386 SilcServer server = (SilcServer)context;
1387 SilcSocketConnection sock = server->sockets[fd];
1388 SilcIDListData idata;
1389 SilcCipher cipher = NULL;
1390 SilcHmac hmac = NULL;
1396 SILC_LOG_DEBUG(("Processing packet"));
1398 /* Packet sending */
1400 if (type == SILC_TASK_WRITE) {
1401 /* Do not send data to disconnected connection */
1402 if (SILC_IS_DISCONNECTED(sock))
1405 server->stat.packets_sent++;
1407 if (sock->outbuf->data - sock->outbuf->head)
1408 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1410 /* Send the packet */
1411 ret = silc_packet_send(sock, TRUE);
1413 /* If returned -2 could not write to connection now, will do
1419 SILC_LOG_ERROR(("Error sending packet to connection "
1420 "%s:%d [%s]", sock->hostname, sock->port,
1421 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1422 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1423 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1428 /* The packet has been sent and now it is time to set the connection
1429 back to only for input. When there is again some outgoing data
1430 available for this connection it will be set for output as well.
1431 This call clears the output setting and sets it only for input. */
1432 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1433 SILC_UNSET_OUTBUF_PENDING(sock);
1435 silc_buffer_clear(sock->outbuf);
1439 /* Packet receiving */
1441 /* Read some data from connection */
1442 ret = silc_packet_receive(sock);
1446 SILC_LOG_ERROR(("Error receiving packet from connection "
1447 "%s:%d [%s]", sock->hostname, sock->port,
1448 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1449 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1450 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1457 SILC_LOG_DEBUG(("Read EOF"));
1459 /* If connection is disconnecting already we will finally
1460 close the connection */
1461 if (SILC_IS_DISCONNECTING(sock)) {
1462 if (sock->user_data)
1463 silc_server_free_sock_user_data(server, sock);
1464 silc_server_close_connection(server, sock);
1468 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1469 SILC_SET_DISCONNECTING(sock);
1471 /* If the closed connection was our primary router connection the
1472 start re-connecting phase. */
1473 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1474 sock == server->router->connection)
1475 silc_schedule_task_add(server->schedule, 0,
1476 silc_server_connect_to_router,
1479 SILC_TASK_PRI_NORMAL);
1481 if (sock->user_data)
1482 silc_server_free_sock_user_data(server, sock);
1483 silc_server_close_connection(server, sock);
1487 /* If connection is disconnecting or disconnected we will ignore
1489 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1490 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1494 server->stat.packets_received++;
1496 /* Get keys and stuff from ID entry */
1497 idata = (SilcIDListData)sock->user_data;
1499 cipher = idata->receive_key;
1500 hmac = idata->hmac_receive;
1503 /* Process the packet. This will call the parser that will then
1504 decrypt and parse the packet. */
1505 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1509 /* Callback function that the silc_packet_decrypt will call to make the
1510 decision whether the packet is normal or special packet. We will
1511 return TRUE if it is normal and FALSE if it is special */
1513 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1515 SilcPacketContext *packet,
1518 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1519 SilcServer server = (SilcServer)parse_ctx->context;
1521 /* Packet is normal packet, if:
1523 1) packet is private message packet and does not have private key set
1524 2) is other packet than channel message packet
1525 3) is channel message packet and remote is router and we are router
1527 all other packets are special packets
1530 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1531 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1534 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1535 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1536 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1537 server->server_type == SILC_ROUTER))
1543 /* Parses whole packet, received earlier. */
1545 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1547 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1548 SilcServer server = (SilcServer)parse_ctx->context;
1549 SilcSocketConnection sock = parse_ctx->sock;
1550 SilcPacketContext *packet = parse_ctx->packet;
1551 SilcIDListData idata = (SilcIDListData)sock->user_data;
1554 SILC_LOG_DEBUG(("Start"));
1556 /* Decrypt the received packet */
1557 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1558 idata ? idata->hmac_receive : NULL,
1559 packet->buffer, packet,
1560 silc_server_packet_decrypt_check, parse_ctx);
1562 SILC_LOG_WARNING(("Packet decryption failed for connection "
1563 "%s:%d [%s]", sock->hostname, sock->port,
1564 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1565 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1566 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1572 /* Parse the packet. Packet type is returned. */
1573 ret = silc_packet_parse(packet);
1575 /* Parse the packet header in special way as this is "special"
1577 ret = silc_packet_parse_special(packet);
1580 if (ret == SILC_PACKET_NONE)
1583 /* Check that the the current client ID is same as in the client's packet. */
1584 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1585 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1586 if (client && client->id) {
1587 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1588 packet->src_id_type);
1589 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1597 if (server->server_type == SILC_ROUTER) {
1598 /* Route the packet if it is not destined to us. Other ID types but
1599 server are handled separately after processing them. */
1600 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1601 packet->dst_id_type == SILC_ID_SERVER &&
1602 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1603 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1605 /* Route the packet to fastest route for the destination ID */
1606 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1607 packet->dst_id_type);
1610 silc_server_packet_route(server,
1611 silc_server_route_get(server, id,
1612 packet->dst_id_type),
1619 /* Parse the incoming packet type */
1620 silc_server_packet_parse_type(server, sock, packet);
1622 if (server->server_type == SILC_ROUTER) {
1623 /* Broadcast packet if it is marked as broadcast packet and it is
1624 originated from router and we are router. */
1625 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1626 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1627 !server->standalone) {
1628 silc_server_packet_broadcast(server, server->router->connection, packet);
1633 /* silc_buffer_clear(sock->inbuf); */
1634 silc_packet_context_free(packet);
1635 silc_free(parse_ctx);
1638 /* Parser callback called by silc_packet_receive_process. This merely
1639 registers timeout that will handle the actual parsing when appropriate. */
1641 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1643 SilcServer server = (SilcServer)parser_context->context;
1644 SilcSocketConnection sock = parser_context->sock;
1646 switch (sock->type) {
1647 case SILC_SOCKET_TYPE_UNKNOWN:
1648 case SILC_SOCKET_TYPE_CLIENT:
1649 /* Parse the packet with timeout */
1650 silc_schedule_task_add(server->schedule, sock->sock,
1651 silc_server_packet_parse_real,
1652 (void *)parser_context, 0, 100000,
1654 SILC_TASK_PRI_NORMAL);
1656 case SILC_SOCKET_TYPE_SERVER:
1657 case SILC_SOCKET_TYPE_ROUTER:
1658 /* Packets from servers are parsed as soon as possible */
1659 silc_schedule_task_add(server->schedule, sock->sock,
1660 silc_server_packet_parse_real,
1661 (void *)parser_context, 0, 1,
1663 SILC_TASK_PRI_NORMAL);
1670 /* Parses the packet type and calls what ever routines the packet type
1671 requires. This is done for all incoming packets. */
1673 void silc_server_packet_parse_type(SilcServer server,
1674 SilcSocketConnection sock,
1675 SilcPacketContext *packet)
1677 SilcPacketType type = packet->type;
1678 SilcIDListData idata = (SilcIDListData)sock->user_data;
1680 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1682 /* Parse the packet type */
1684 case SILC_PACKET_DISCONNECT:
1685 SILC_LOG_DEBUG(("Disconnect packet"));
1686 if (packet->flags & SILC_PACKET_FLAG_LIST)
1690 case SILC_PACKET_SUCCESS:
1692 * Success received for something. For now we can have only
1693 * one protocol for connection executing at once hence this
1694 * success message is for whatever protocol is executing currently.
1696 SILC_LOG_DEBUG(("Success packet"));
1697 if (packet->flags & SILC_PACKET_FLAG_LIST)
1700 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1703 case SILC_PACKET_FAILURE:
1705 * Failure received for something. For now we can have only
1706 * one protocol for connection executing at once hence this
1707 * failure message is for whatever protocol is executing currently.
1709 SILC_LOG_DEBUG(("Failure packet"));
1710 if (packet->flags & SILC_PACKET_FLAG_LIST)
1712 if (sock->protocol) {
1713 SilcServerFailureContext f;
1714 f = silc_calloc(1, sizeof(*f));
1718 /* We will wait 5 seconds to process this failure packet */
1719 silc_schedule_task_add(server->schedule, sock->sock,
1720 silc_server_failure_callback, (void *)f, 5, 0,
1721 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1725 case SILC_PACKET_REJECT:
1726 SILC_LOG_DEBUG(("Reject packet"));
1727 if (packet->flags & SILC_PACKET_FLAG_LIST)
1732 case SILC_PACKET_NOTIFY:
1734 * Received notify packet. Server can receive notify packets from
1735 * router. Server then relays the notify messages to clients if needed.
1737 SILC_LOG_DEBUG(("Notify packet"));
1738 if (packet->flags & SILC_PACKET_FLAG_LIST)
1739 silc_server_notify_list(server, sock, packet);
1741 silc_server_notify(server, sock, packet);
1747 case SILC_PACKET_CHANNEL_MESSAGE:
1749 * Received channel message. Channel messages are special packets
1750 * (although probably most common ones) thus they are handled
1753 SILC_LOG_DEBUG(("Channel Message packet"));
1754 if (packet->flags & SILC_PACKET_FLAG_LIST)
1756 idata->last_receive = time(NULL);
1757 silc_server_channel_message(server, sock, packet);
1760 case SILC_PACKET_CHANNEL_KEY:
1762 * Received key for channel. As channels are created by the router
1763 * the keys are as well. We will distribute the key to all of our
1764 * locally connected clients on the particular channel. Router
1765 * never receives this channel and thus is ignored.
1767 SILC_LOG_DEBUG(("Channel Key packet"));
1768 if (packet->flags & SILC_PACKET_FLAG_LIST)
1770 silc_server_channel_key(server, sock, packet);
1776 case SILC_PACKET_COMMAND:
1778 * Recived command. Processes the command request and allocates the
1779 * command context and calls the command.
1781 SILC_LOG_DEBUG(("Command packet"));
1782 if (packet->flags & SILC_PACKET_FLAG_LIST)
1784 silc_server_command_process(server, sock, packet);
1787 case SILC_PACKET_COMMAND_REPLY:
1789 * Received command reply packet. Received command reply to command. It
1790 * may be reply to command sent by us or reply to command sent by client
1791 * that we've routed further.
1793 SILC_LOG_DEBUG(("Command Reply packet"));
1794 if (packet->flags & SILC_PACKET_FLAG_LIST)
1796 silc_server_command_reply(server, sock, packet);
1800 * Private Message packets
1802 case SILC_PACKET_PRIVATE_MESSAGE:
1804 * Received private message packet. The packet is coming from either
1807 SILC_LOG_DEBUG(("Private Message packet"));
1808 if (packet->flags & SILC_PACKET_FLAG_LIST)
1810 idata->last_receive = time(NULL);
1811 silc_server_private_message(server, sock, packet);
1814 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1816 * Private message key packet.
1818 if (packet->flags & SILC_PACKET_FLAG_LIST)
1820 silc_server_private_message_key(server, sock, packet);
1824 * Key Exchange protocol packets
1826 case SILC_PACKET_KEY_EXCHANGE:
1827 SILC_LOG_DEBUG(("KE packet"));
1828 if (packet->flags & SILC_PACKET_FLAG_LIST)
1831 if (sock->protocol && sock->protocol->protocol &&
1832 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1834 SilcServerKEInternalContext *proto_ctx =
1835 (SilcServerKEInternalContext *)sock->protocol->context;
1837 proto_ctx->packet = silc_packet_context_dup(packet);
1839 /* Let the protocol handle the packet */
1840 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1842 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1843 "protocol active, packet dropped."));
1847 case SILC_PACKET_KEY_EXCHANGE_1:
1848 SILC_LOG_DEBUG(("KE 1 packet"));
1849 if (packet->flags & SILC_PACKET_FLAG_LIST)
1852 if (sock->protocol && sock->protocol->protocol &&
1853 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1854 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1856 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1857 SilcServerRekeyInternalContext *proto_ctx =
1858 (SilcServerRekeyInternalContext *)sock->protocol->context;
1860 if (proto_ctx->packet)
1861 silc_packet_context_free(proto_ctx->packet);
1863 proto_ctx->packet = silc_packet_context_dup(packet);
1865 /* Let the protocol handle the packet */
1866 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1868 SilcServerKEInternalContext *proto_ctx =
1869 (SilcServerKEInternalContext *)sock->protocol->context;
1871 if (proto_ctx->packet)
1872 silc_packet_context_free(proto_ctx->packet);
1874 proto_ctx->packet = silc_packet_context_dup(packet);
1875 proto_ctx->dest_id_type = packet->src_id_type;
1876 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1877 packet->src_id_type);
1878 if (!proto_ctx->dest_id)
1881 /* Let the protocol handle the packet */
1882 silc_protocol_execute(sock->protocol, server->schedule,
1886 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1887 "protocol active, packet dropped."));
1891 case SILC_PACKET_KEY_EXCHANGE_2:
1892 SILC_LOG_DEBUG(("KE 2 packet"));
1893 if (packet->flags & SILC_PACKET_FLAG_LIST)
1896 if (sock->protocol && sock->protocol->protocol &&
1897 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1898 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1900 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1901 SilcServerRekeyInternalContext *proto_ctx =
1902 (SilcServerRekeyInternalContext *)sock->protocol->context;
1904 if (proto_ctx->packet)
1905 silc_packet_context_free(proto_ctx->packet);
1907 proto_ctx->packet = silc_packet_context_dup(packet);
1909 /* Let the protocol handle the packet */
1910 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1912 SilcServerKEInternalContext *proto_ctx =
1913 (SilcServerKEInternalContext *)sock->protocol->context;
1915 if (proto_ctx->packet)
1916 silc_packet_context_free(proto_ctx->packet);
1918 proto_ctx->packet = silc_packet_context_dup(packet);
1919 proto_ctx->dest_id_type = packet->src_id_type;
1920 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1921 packet->src_id_type);
1922 if (!proto_ctx->dest_id)
1925 /* Let the protocol handle the packet */
1926 silc_protocol_execute(sock->protocol, server->schedule,
1930 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1931 "protocol active, packet dropped."));
1935 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1937 * Connection authentication request packet. When we receive this packet
1938 * we will send to the other end information about our mandatory
1939 * authentication method for the connection. This packet maybe received
1942 SILC_LOG_DEBUG(("Connection authentication request packet"));
1943 if (packet->flags & SILC_PACKET_FLAG_LIST)
1945 silc_server_connection_auth_request(server, sock, packet);
1949 * Connection Authentication protocol packets
1951 case SILC_PACKET_CONNECTION_AUTH:
1952 /* Start of the authentication protocol. We receive here the
1953 authentication data and will verify it. */
1954 SILC_LOG_DEBUG(("Connection auth packet"));
1955 if (packet->flags & SILC_PACKET_FLAG_LIST)
1958 if (sock->protocol && sock->protocol->protocol->type
1959 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1961 SilcServerConnAuthInternalContext *proto_ctx =
1962 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1964 proto_ctx->packet = silc_packet_context_dup(packet);
1966 /* Let the protocol handle the packet */
1967 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1969 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1970 "protocol active, packet dropped."));
1974 case SILC_PACKET_NEW_ID:
1976 * Received New ID packet. This includes some new ID that has been
1977 * created. It may be for client, server or channel. This is the way
1978 * to distribute information about new registered entities in the
1981 SILC_LOG_DEBUG(("New ID packet"));
1982 if (packet->flags & SILC_PACKET_FLAG_LIST)
1983 silc_server_new_id_list(server, sock, packet);
1985 silc_server_new_id(server, sock, packet);
1988 case SILC_PACKET_NEW_CLIENT:
1990 * Received new client packet. This includes client information that
1991 * we will use to create initial client ID. After creating new
1992 * ID we will send it to the client.
1994 SILC_LOG_DEBUG(("New Client packet"));
1995 if (packet->flags & SILC_PACKET_FLAG_LIST)
1997 silc_server_new_client(server, sock, packet);
2000 case SILC_PACKET_NEW_SERVER:
2002 * Received new server packet. This includes Server ID and some other
2003 * information that we may save. This is received after server has
2006 SILC_LOG_DEBUG(("New Server packet"));
2007 if (packet->flags & SILC_PACKET_FLAG_LIST)
2009 silc_server_new_server(server, sock, packet);
2012 case SILC_PACKET_NEW_CHANNEL:
2014 * Received new channel packet. Information about new channel in the
2015 * network are distributed using this packet.
2017 SILC_LOG_DEBUG(("New Channel packet"));
2018 if (packet->flags & SILC_PACKET_FLAG_LIST)
2019 silc_server_new_channel_list(server, sock, packet);
2021 silc_server_new_channel(server, sock, packet);
2024 case SILC_PACKET_HEARTBEAT:
2026 * Received heartbeat.
2028 SILC_LOG_DEBUG(("Heartbeat packet"));
2029 if (packet->flags & SILC_PACKET_FLAG_LIST)
2033 case SILC_PACKET_KEY_AGREEMENT:
2035 * Received heartbeat.
2037 SILC_LOG_DEBUG(("Key agreement packet"));
2038 if (packet->flags & SILC_PACKET_FLAG_LIST)
2040 silc_server_key_agreement(server, sock, packet);
2043 case SILC_PACKET_REKEY:
2045 * Received re-key packet. The sender wants to regenerate the session
2048 SILC_LOG_DEBUG(("Re-key packet"));
2049 if (packet->flags & SILC_PACKET_FLAG_LIST)
2051 silc_server_rekey(server, sock, packet);
2054 case SILC_PACKET_REKEY_DONE:
2056 * The re-key is done.
2058 SILC_LOG_DEBUG(("Re-key done packet"));
2059 if (packet->flags & SILC_PACKET_FLAG_LIST)
2062 if (sock->protocol && sock->protocol->protocol &&
2063 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2065 SilcServerRekeyInternalContext *proto_ctx =
2066 (SilcServerRekeyInternalContext *)sock->protocol->context;
2068 if (proto_ctx->packet)
2069 silc_packet_context_free(proto_ctx->packet);
2071 proto_ctx->packet = silc_packet_context_dup(packet);
2073 /* Let the protocol handle the packet */
2074 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2076 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2077 "protocol active, packet dropped."));
2082 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2088 /* Creates connection to a remote router. */
2090 void silc_server_create_connection(SilcServer server,
2091 char *remote_host, uint32 port)
2093 SilcServerConnection sconn;
2095 /* Allocate connection object for hold connection specific stuff. */
2096 sconn = silc_calloc(1, sizeof(*sconn));
2097 sconn->server = server;
2098 sconn->remote_host = strdup(remote_host);
2099 sconn->remote_port = port;
2101 silc_schedule_task_add(server->schedule, 0,
2102 silc_server_connect_router,
2103 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2104 SILC_TASK_PRI_NORMAL);
2107 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2109 silc_socket_free((SilcSocketConnection)context);
2112 /* Closes connection to socket connection */
2114 void silc_server_close_connection(SilcServer server,
2115 SilcSocketConnection sock)
2117 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2119 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2120 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2121 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2124 /* We won't listen for this connection anymore */
2125 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2127 /* Unregister all tasks */
2128 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2130 /* Close the actual connection */
2131 silc_net_close_connection(sock->sock);
2132 server->sockets[sock->sock] = NULL;
2134 /* If sock->user_data is NULL then we'll check for active protocols
2135 here since the silc_server_free_sock_user_data has not been called
2136 for this connection. */
2137 if (!sock->user_data) {
2138 /* If any protocol is active cancel its execution. It will call
2139 the final callback which will finalize the disconnection. */
2140 if (sock->protocol) {
2141 silc_protocol_cancel(sock->protocol, server->schedule);
2142 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2143 silc_protocol_execute_final(sock->protocol, server->schedule);
2144 sock->protocol = NULL;
2149 silc_schedule_task_add(server->schedule, 0,
2150 silc_server_close_connection_final,
2151 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2152 SILC_TASK_PRI_NORMAL);
2155 /* Sends disconnect message to remote connection and disconnects the
2158 void silc_server_disconnect_remote(SilcServer server,
2159 SilcSocketConnection sock,
2160 const char *fmt, ...)
2163 unsigned char buf[4096];
2168 memset(buf, 0, sizeof(buf));
2170 vsprintf(buf, fmt, ap);
2173 SILC_LOG_DEBUG(("Disconnecting remote host"));
2175 /* Notify remote end that the conversation is over. The notify message
2176 is tried to be sent immediately. */
2177 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2178 buf, strlen(buf), TRUE);
2180 /* Mark the connection to be disconnected */
2181 SILC_SET_DISCONNECTED(sock);
2182 silc_server_close_connection(server, sock);
2187 SilcClientEntry client;
2188 } *FreeClientInternal;
2190 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2192 FreeClientInternal i = (FreeClientInternal)context;
2194 silc_idlist_del_data(i->client);
2195 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2199 /* Frees client data and notifies about client's signoff. */
2201 void silc_server_free_client_data(SilcServer server,
2202 SilcSocketConnection sock,
2203 SilcClientEntry client,
2207 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2209 /* If there is pending outgoing data for the client then purge it
2210 to the network before removing the client entry. */
2211 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2212 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2213 server->stat.packets_sent++;
2215 if (sock->outbuf->data - sock->outbuf->head)
2216 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2218 silc_packet_send(sock, TRUE);
2220 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2221 SILC_UNSET_OUTBUF_PENDING(sock);
2222 silc_buffer_clear(sock->outbuf);
2225 /* Send SIGNOFF notify to routers. */
2226 if (notify && !server->standalone && server->router)
2227 silc_server_send_notify_signoff(server, server->router->connection,
2228 server->server_type == SILC_SERVER ?
2229 FALSE : TRUE, client->id, signoff);
2231 /* Remove client from all channels */
2233 silc_server_remove_from_channels(server, NULL, client,
2234 TRUE, signoff, TRUE);
2236 silc_server_remove_from_channels(server, NULL, client,
2237 FALSE, NULL, FALSE);
2239 /* We will not delete the client entry right away. We will take it
2240 into history (for WHOWAS command) for 5 minutes */
2243 silc_schedule_task_add(server->schedule, 0,
2244 silc_server_free_client_data_timeout,
2246 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2247 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2248 client->router = NULL;
2249 client->connection = NULL;
2251 /* Free the client entry and everything in it */
2252 server->stat.my_clients--;
2253 server->stat.clients--;
2254 if (server->server_type == SILC_ROUTER)
2255 server->stat.cell_clients--;
2258 /* Frees user_data pointer from socket connection object. This also sends
2259 appropriate notify packets to the network to inform about leaving
2262 void silc_server_free_sock_user_data(SilcServer server,
2263 SilcSocketConnection sock)
2265 SILC_LOG_DEBUG(("Start"));
2267 switch (sock->type) {
2268 case SILC_SOCKET_TYPE_CLIENT:
2270 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2271 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2274 case SILC_SOCKET_TYPE_SERVER:
2275 case SILC_SOCKET_TYPE_ROUTER:
2277 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2279 /* Free all client entries that this server owns as they will
2280 become invalid now as well. */
2282 silc_server_remove_clients_by_server(server, user_data, TRUE);
2284 /* If this was our primary router connection then we're lost to
2285 the outside world. */
2286 if (server->router == user_data) {
2287 server->id_entry->router = NULL;
2288 server->router = NULL;
2289 server->standalone = TRUE;
2292 /* Free the server entry */
2293 silc_idlist_del_data(user_data);
2294 silc_idlist_del_server(server->local_list, user_data);
2295 server->stat.my_servers--;
2296 server->stat.servers--;
2297 if (server->server_type == SILC_ROUTER)
2298 server->stat.cell_servers--;
2303 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2305 silc_idlist_del_data(user_data);
2306 silc_free(user_data);
2311 /* If any protocol is active cancel its execution */
2312 if (sock->protocol) {
2313 silc_protocol_cancel(sock->protocol, server->schedule);
2314 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2315 silc_protocol_execute_final(sock->protocol, server->schedule);
2316 sock->protocol = NULL;
2319 sock->user_data = NULL;
2322 /* Removes the client from channels and possibly removes the channels
2323 as well. After removing those channels that exist, their channel
2324 keys are regnerated. This is called only by the function
2325 silc_server_remove_clients_by_server. */
2327 static void silc_server_remove_clients_channels(SilcServer server,
2328 SilcSocketConnection sock,
2329 SilcClientEntry client,
2330 SilcHashTable channels)
2332 SilcChannelEntry channel;
2333 SilcChannelClientEntry chl;
2334 SilcHashTableList htl;
2337 SILC_LOG_DEBUG(("Start"));
2339 if (!client || !client->id)
2342 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2344 /* Remove the client from all channels. The client is removed from
2345 the channels' user list. */
2346 silc_hash_table_list(client->channels, &htl);
2347 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2348 channel = chl->channel;
2350 /* Remove channel from client's channel list */
2351 silc_hash_table_del(client->channels, channel);
2353 /* Remove channel if there is no users anymore */
2354 if (server->server_type == SILC_ROUTER &&
2355 silc_hash_table_count(channel->user_list) < 2) {
2357 if (silc_hash_table_find(channels, channel, NULL, NULL))
2358 silc_hash_table_del(channels, channel);
2361 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2363 if (!silc_idlist_del_channel(server->local_list, channel))
2364 silc_idlist_del_channel(server->global_list, channel);
2365 server->stat.my_channels--;
2369 /* Remove client from channel's client list */
2370 silc_hash_table_del(channel->user_list, chl->client);
2372 server->stat.my_chanclients--;
2374 /* If there is no global users on the channel anymore mark the channel
2375 as local channel. Do not check if the removed client is local client. */
2376 if (server->server_type == SILC_SERVER && channel->global_users &&
2377 chl->client->router && !silc_server_channel_has_global(channel))
2378 channel->global_users = FALSE;
2380 /* If there is not at least one local user on the channel then we don't
2381 need the channel entry anymore, we can remove it safely. */
2382 if (server->server_type == SILC_SERVER &&
2383 !silc_server_channel_has_local(channel)) {
2385 if (silc_hash_table_find(channels, channel, NULL, NULL))
2386 silc_hash_table_del(channels, channel);
2389 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2391 if (channel->founder_key) {
2392 /* The founder auth data exists, do not remove the channel entry */
2393 SilcChannelClientEntry chl2;
2394 SilcHashTableList htl2;
2398 silc_hash_table_list(channel->user_list, &htl2);
2399 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2400 silc_hash_table_del(chl2->client->channels, channel);
2401 silc_hash_table_del(channel->user_list, chl2->client);
2407 /* Remove the channel entry */
2408 if (!silc_idlist_del_channel(server->local_list, channel))
2409 silc_idlist_del_channel(server->global_list, channel);
2410 server->stat.my_channels--;
2414 /* Add the channel to the the channels list to regenerate the
2416 if (!silc_hash_table_find(channels, channel, NULL, NULL))
2417 silc_hash_table_add(channels, channel, channel);
2420 silc_buffer_free(clidp);
2423 /* This function is used to remove all client entries by the server `entry'.
2424 This is called when the connection is lost to the server. In this case
2425 we must invalidate all the client entries owned by the server `entry'.
2426 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2427 distributed to our local clients. */
2429 int silc_server_remove_clients_by_server(SilcServer server,
2430 SilcServerEntry entry,
2433 SilcIDCacheList list = NULL;
2434 SilcIDCacheEntry id_cache = NULL;
2435 SilcClientEntry client = NULL;
2437 SilcClientEntry *clients = NULL;
2438 uint32 clients_c = 0;
2439 unsigned char **argv = NULL;
2440 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2441 SilcHashTableList htl;
2442 SilcChannelEntry channel;
2443 SilcHashTable channels;
2446 SILC_LOG_DEBUG(("Start"));
2448 /* Allocate the hash table that holds the channels that require
2449 channel key re-generation after we've removed this server's clients
2450 from the channels. */
2451 channels = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
2454 if (server_signoff) {
2455 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2456 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2457 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2458 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2459 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2460 memcpy(argv[argc], idp->data, idp->len);
2461 argv_lens[argc] = idp->len;
2462 argv_types[argc] = argc + 1;
2464 silc_buffer_free(idp);
2467 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2469 if (silc_idcache_list_first(list, &id_cache)) {
2471 client = (SilcClientEntry)id_cache->context;
2472 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2473 if (!silc_idcache_list_next(list, &id_cache))
2479 if (client->router != entry) {
2480 if (server_signoff && client->connection) {
2481 clients = silc_realloc(clients,
2482 sizeof(*clients) * (clients_c + 1));
2483 clients[clients_c] = client;
2487 if (!silc_idcache_list_next(list, &id_cache))
2493 if (server_signoff) {
2494 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2495 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2496 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2498 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2500 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2501 memcpy(argv[argc], idp->data, idp->len);
2502 argv_lens[argc] = idp->len;
2503 argv_types[argc] = argc + 1;
2505 silc_buffer_free(idp);
2508 /* Remove the client entry */
2509 silc_server_remove_clients_channels(server, NULL, client, channels);
2510 silc_idlist_del_client(server->local_list, client);
2512 if (!silc_idcache_list_next(list, &id_cache))
2516 silc_idcache_list_free(list);
2519 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2521 if (silc_idcache_list_first(list, &id_cache)) {
2523 client = (SilcClientEntry)id_cache->context;
2524 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2525 if (!silc_idcache_list_next(list, &id_cache))
2531 if (client->router != entry) {
2532 if (server_signoff && client->connection) {
2533 clients = silc_realloc(clients,
2534 sizeof(*clients) * (clients_c + 1));
2535 clients[clients_c] = client;
2539 if (!silc_idcache_list_next(list, &id_cache))
2545 if (server_signoff) {
2546 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2547 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2548 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2550 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2552 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2553 memcpy(argv[argc], idp->data, idp->len);
2554 argv_lens[argc] = idp->len;
2555 argv_types[argc] = argc + 1;
2557 silc_buffer_free(idp);
2560 /* Remove the client entry */
2561 silc_server_remove_clients_channels(server, NULL, client, channels);
2562 silc_idlist_del_client(server->global_list, client);
2564 if (!silc_idcache_list_next(list, &id_cache))
2568 silc_idcache_list_free(list);
2571 /* Send the SERVER_SIGNOFF notify */
2572 if (server_signoff) {
2575 /* Send SERVER_SIGNOFF notify to our primary router */
2576 if (!server->standalone && server->router &&
2577 server->router != entry) {
2578 args = silc_argument_payload_encode(1, argv, argv_lens,
2580 silc_server_send_notify_args(server,
2581 server->router->connection,
2582 server->server_type == SILC_SERVER ?
2584 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2586 silc_buffer_free(args);
2589 args = silc_argument_payload_encode(argc, argv, argv_lens,
2591 /* Send to local clients */
2592 for (i = 0; i < clients_c; i++) {
2593 silc_server_send_notify_args(server, clients[i]->connection,
2594 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2599 silc_buffer_free(args);
2600 for (i = 0; i < argc; i++)
2603 silc_free(argv_lens);
2604 silc_free(argv_types);
2607 /* We must now re-generate the channel key for all channels that had
2608 this server's client(s) on the channel. As they left the channel we
2609 must re-generate the channel key. */
2610 silc_hash_table_list(channels, &htl);
2611 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
2612 if (!silc_server_create_channel_key(server, channel, 0))
2615 /* Do not send the channel key if private channel key mode is set */
2616 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY)
2619 silc_server_send_channel_key(server, NULL, channel,
2620 server->server_type == SILC_ROUTER ?
2621 FALSE : !server->standalone);
2623 silc_hash_table_free(channels);
2628 /* Checks whether given channel has global users. If it does this returns
2629 TRUE and FALSE if there is only locally connected clients on the channel. */
2631 int silc_server_channel_has_global(SilcChannelEntry channel)
2633 SilcChannelClientEntry chl;
2634 SilcHashTableList htl;
2636 silc_hash_table_list(channel->user_list, &htl);
2637 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2638 if (chl->client->router)
2645 /* Checks whether given channel has locally connected users. If it does this
2646 returns TRUE and FALSE if there is not one locally connected client. */
2648 int silc_server_channel_has_local(SilcChannelEntry channel)
2650 SilcChannelClientEntry chl;
2651 SilcHashTableList htl;
2653 silc_hash_table_list(channel->user_list, &htl);
2654 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2655 if (!chl->client->router)
2662 /* Removes client from all channels it has joined. This is used when client
2663 connection is disconnected. If the client on a channel is last, the
2664 channel is removed as well. This sends the SIGNOFF notify types. */
2666 void silc_server_remove_from_channels(SilcServer server,
2667 SilcSocketConnection sock,
2668 SilcClientEntry client,
2670 char *signoff_message,
2673 SilcChannelEntry channel;
2674 SilcChannelClientEntry chl;
2675 SilcHashTableList htl;
2678 SILC_LOG_DEBUG(("Start"));
2680 if (!client || !client->id)
2683 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2685 /* Remove the client from all channels. The client is removed from
2686 the channels' user list. */
2687 silc_hash_table_list(client->channels, &htl);
2688 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2689 channel = chl->channel;
2691 /* Remove channel from client's channel list */
2692 silc_hash_table_del(client->channels, channel);
2694 /* Remove channel if there is no users anymore */
2695 if (server->server_type == SILC_ROUTER &&
2696 silc_hash_table_count(channel->user_list) < 2) {
2698 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2699 if (!silc_idlist_del_channel(server->local_list, channel))
2700 silc_idlist_del_channel(server->global_list, channel);
2701 server->stat.my_channels--;
2705 /* Remove client from channel's client list */
2706 silc_hash_table_del(channel->user_list, chl->client);
2708 server->stat.my_chanclients--;
2710 /* If there is no global users on the channel anymore mark the channel
2711 as local channel. Do not check if the removed client is local client. */
2712 if (server->server_type == SILC_SERVER && channel->global_users &&
2713 chl->client->router && !silc_server_channel_has_global(channel))
2714 channel->global_users = FALSE;
2716 /* If there is not at least one local user on the channel then we don't
2717 need the channel entry anymore, we can remove it safely. */
2718 if (server->server_type == SILC_SERVER &&
2719 !silc_server_channel_has_local(channel)) {
2720 /* Notify about leaving client if this channel has global users. */
2721 if (notify && channel->global_users)
2722 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2723 SILC_NOTIFY_TYPE_SIGNOFF,
2724 signoff_message ? 2 : 1,
2725 clidp->data, clidp->len,
2726 signoff_message, signoff_message ?
2727 strlen(signoff_message) : 0);
2730 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2732 if (channel->founder_key) {
2733 /* The founder auth data exists, do not remove the channel entry */
2734 SilcChannelClientEntry chl2;
2735 SilcHashTableList htl2;
2739 silc_hash_table_list(channel->user_list, &htl2);
2740 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2741 silc_hash_table_del(chl2->client->channels, channel);
2742 silc_hash_table_del(channel->user_list, chl2->client);
2748 /* Remove the channel entry */
2749 if (!silc_idlist_del_channel(server->local_list, channel))
2750 silc_idlist_del_channel(server->global_list, channel);
2751 server->stat.my_channels--;
2755 /* Send notify to channel about client leaving SILC and thus
2756 the entire channel. */
2758 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2759 SILC_NOTIFY_TYPE_SIGNOFF,
2760 signoff_message ? 2 : 1,
2761 clidp->data, clidp->len,
2762 signoff_message, signoff_message ?
2763 strlen(signoff_message) : 0);
2765 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2766 /* Re-generate channel key */
2767 if (!silc_server_create_channel_key(server, channel, 0))
2770 /* Send the channel key to the channel. The key of course is not sent
2771 to the client who was removed from the channel. */
2772 silc_server_send_channel_key(server, client->connection, channel,
2773 server->server_type == SILC_ROUTER ?
2774 FALSE : !server->standalone);
2778 silc_buffer_free(clidp);
2781 /* Removes client from one channel. This is used for example when client
2782 calls LEAVE command to remove itself from the channel. Returns TRUE
2783 if channel still exists and FALSE if the channel is removed when
2784 last client leaves the channel. If `notify' is FALSE notify messages
2787 int silc_server_remove_from_one_channel(SilcServer server,
2788 SilcSocketConnection sock,
2789 SilcChannelEntry channel,
2790 SilcClientEntry client,
2793 SilcChannelClientEntry chl;
2796 SILC_LOG_DEBUG(("Start"));
2798 /* Get the entry to the channel, if this client is not on the channel
2800 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2803 /* Remove the client from the channel. The client is removed from
2804 the channel's user list. */
2806 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2808 /* Remove channel from client's channel list */
2809 silc_hash_table_del(client->channels, chl->channel);
2811 /* Remove channel if there is no users anymore */
2812 if (server->server_type == SILC_ROUTER &&
2813 silc_hash_table_count(channel->user_list) < 2) {
2815 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2816 if (!silc_idlist_del_channel(server->local_list, channel))
2817 silc_idlist_del_channel(server->global_list, channel);
2818 silc_buffer_free(clidp);
2819 server->stat.my_channels--;
2823 /* Remove client from channel's client list */
2824 silc_hash_table_del(channel->user_list, chl->client);
2826 server->stat.my_chanclients--;
2828 /* If there is no global users on the channel anymore mark the channel
2829 as local channel. Do not check if the client is local client. */
2830 if (server->server_type == SILC_SERVER && channel->global_users &&
2831 chl->client->router && !silc_server_channel_has_global(channel))
2832 channel->global_users = FALSE;
2834 /* If there is not at least one local user on the channel then we don't
2835 need the channel entry anymore, we can remove it safely. */
2836 if (server->server_type == SILC_SERVER &&
2837 !silc_server_channel_has_local(channel)) {
2838 /* Notify about leaving client if this channel has global users. */
2839 if (notify && channel->global_users)
2840 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2841 SILC_NOTIFY_TYPE_LEAVE, 1,
2842 clidp->data, clidp->len);
2844 silc_buffer_free(clidp);
2847 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2849 if (channel->founder_key) {
2850 /* The founder auth data exists, do not remove the channel entry */
2851 SilcChannelClientEntry chl2;
2852 SilcHashTableList htl2;
2856 silc_hash_table_list(channel->user_list, &htl2);
2857 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2858 silc_hash_table_del(chl2->client->channels, channel);
2859 silc_hash_table_del(channel->user_list, chl2->client);
2865 /* Remove the channel entry */
2866 if (!silc_idlist_del_channel(server->local_list, channel))
2867 silc_idlist_del_channel(server->global_list, channel);
2868 server->stat.my_channels--;
2872 /* Send notify to channel about client leaving the channel */
2874 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2875 SILC_NOTIFY_TYPE_LEAVE, 1,
2876 clidp->data, clidp->len);
2878 silc_buffer_free(clidp);
2882 /* Returns TRUE if the given client is on the channel. FALSE if not.
2883 This works because we assure that the user list on the channel is
2884 always in up to date thus we can only check the channel list from
2885 `client' which is faster than checking the user list from `channel'. */
2887 int silc_server_client_on_channel(SilcClientEntry client,
2888 SilcChannelEntry channel)
2890 if (!client || !channel)
2893 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2899 /* Timeout callback. This is called if connection is idle or for some
2900 other reason is not responding within some period of time. This
2901 disconnects the remote end. */
2903 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2905 SilcServer server = (SilcServer)context;
2906 SilcSocketConnection sock = server->sockets[fd];
2908 SILC_LOG_DEBUG(("Start"));
2913 /* If we have protocol active we must assure that we call the protocol's
2914 final callback so that all the memory is freed. */
2915 if (sock->protocol) {
2916 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2917 silc_protocol_execute_final(sock->protocol, server->schedule);
2921 if (sock->user_data)
2922 silc_server_free_sock_user_data(server, sock);
2924 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2925 "Connection timeout");
2928 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2929 function may be used only by router. In real SILC network all channels
2930 are created by routers thus this function is never used by normal
2933 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2934 SilcServerID *router_id,
2940 SilcChannelID *channel_id;
2941 SilcChannelEntry entry;
2945 SILC_LOG_DEBUG(("Creating new channel"));
2948 cipher = SILC_DEFAULT_CIPHER;
2950 hmac = SILC_DEFAULT_HMAC;
2952 /* Allocate cipher */
2953 if (!silc_cipher_alloc(cipher, &key))
2957 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2958 silc_cipher_free(key);
2962 channel_name = strdup(channel_name);
2964 /* Create the channel */
2965 if (!silc_id_create_channel_id(server, router_id, server->rng,
2967 silc_free(channel_name);
2968 silc_cipher_free(key);
2969 silc_hmac_free(newhmac);
2972 entry = silc_idlist_add_channel(server->local_list, channel_name,
2973 SILC_CHANNEL_MODE_NONE, channel_id,
2974 NULL, key, newhmac);
2976 silc_free(channel_name);
2977 silc_cipher_free(key);
2978 silc_hmac_free(newhmac);
2982 entry->cipher = strdup(cipher);
2983 entry->hmac_name = strdup(hmac);
2985 /* Now create the actual key material */
2986 if (!silc_server_create_channel_key(server, entry,
2987 silc_cipher_get_key_len(key) / 8)) {
2988 silc_free(channel_name);
2989 silc_cipher_free(key);
2990 silc_hmac_free(newhmac);
2991 silc_free(entry->cipher);
2992 silc_free(entry->hmac_name);
2996 /* Notify other routers about the new channel. We send the packet
2997 to our primary route. */
2998 if (broadcast && server->standalone == FALSE)
2999 silc_server_send_new_channel(server, server->router->connection, TRUE,
3000 channel_name, entry->id,
3001 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3004 server->stat.my_channels++;
3009 /* Same as above but creates the channel with Channel ID `channel_id. */
3012 silc_server_create_new_channel_with_id(SilcServer server,
3016 SilcChannelID *channel_id,
3019 SilcChannelEntry entry;
3023 SILC_LOG_DEBUG(("Creating new channel"));
3026 cipher = SILC_DEFAULT_CIPHER;
3028 hmac = SILC_DEFAULT_HMAC;
3030 /* Allocate cipher */
3031 if (!silc_cipher_alloc(cipher, &key))
3035 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3036 silc_cipher_free(key);
3040 channel_name = strdup(channel_name);
3042 /* Create the channel */
3043 entry = silc_idlist_add_channel(server->local_list, channel_name,
3044 SILC_CHANNEL_MODE_NONE, channel_id,
3045 NULL, key, newhmac);
3047 silc_free(channel_name);
3051 /* Now create the actual key material */
3052 if (!silc_server_create_channel_key(server, entry,
3053 silc_cipher_get_key_len(key) / 8)) {
3054 silc_free(channel_name);
3058 /* Notify other routers about the new channel. We send the packet
3059 to our primary route. */
3060 if (broadcast && server->standalone == FALSE)
3061 silc_server_send_new_channel(server, server->router->connection, TRUE,
3062 channel_name, entry->id,
3063 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3066 server->stat.my_channels++;
3071 /* Channel's key re-key timeout callback. */
3073 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3075 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3076 SilcServer server = (SilcServer)rekey->context;
3080 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3083 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3086 /* Generates new channel key. This is used to create the initial channel key
3087 but also to re-generate new key for channel. If `key_len' is provided
3088 it is the bytes of the key length. */
3090 bool silc_server_create_channel_key(SilcServer server,
3091 SilcChannelEntry channel,
3095 unsigned char channel_key[32], hash[32];
3098 SILC_LOG_DEBUG(("Generating channel key"));
3100 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3101 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3105 if (!channel->channel_key)
3106 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
3111 else if (channel->key_len)
3112 len = channel->key_len / 8;
3114 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3116 /* Create channel key */
3117 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3120 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3122 /* Remove old key if exists */
3124 memset(channel->key, 0, channel->key_len / 8);
3125 silc_free(channel->key);
3129 channel->key_len = len * 8;
3130 channel->key = silc_calloc(len, sizeof(*channel->key));
3131 memcpy(channel->key, channel_key, len);
3132 memset(channel_key, 0, sizeof(channel_key));
3134 /* Generate HMAC key from the channel key data and set it */
3136 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3137 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
3138 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3139 memset(hash, 0, sizeof(hash));
3141 if (server->server_type == SILC_ROUTER) {
3142 if (!channel->rekey)
3143 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3144 channel->rekey->context = (void *)server;
3145 channel->rekey->channel = channel;
3146 channel->rekey->key_len = key_len;
3147 if (channel->rekey->task)
3148 silc_schedule_task_del(server->schedule, channel->rekey->task);
3150 channel->rekey->task =
3151 silc_schedule_task_add(server->schedule, 0,
3152 silc_server_channel_key_rekey,
3153 (void *)channel->rekey, 3600, 0,
3155 SILC_TASK_PRI_NORMAL);
3161 /* Saves the channel key found in the encoded `key_payload' buffer. This
3162 function is used when we receive Channel Key Payload and also when we're
3163 processing JOIN command reply. Returns entry to the channel. */
3165 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3166 SilcBuffer key_payload,
3167 SilcChannelEntry channel)
3169 SilcChannelKeyPayload payload = NULL;
3170 SilcChannelID *id = NULL;
3171 unsigned char *tmp, hash[32];
3175 SILC_LOG_DEBUG(("Start"));
3177 /* Decode channel key payload */
3178 payload = silc_channel_key_payload_parse(key_payload);
3180 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
3185 /* Get the channel entry */
3188 /* Get channel ID */
3189 tmp = silc_channel_key_get_id(payload, &tmp_len);
3190 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3196 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3198 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3200 SILC_LOG_ERROR(("Received key for non-existent channel"));
3206 tmp = silc_channel_key_get_key(payload, &tmp_len);
3212 cipher = silc_channel_key_get_cipher(payload, NULL);
3218 /* Remove old key if exists */
3220 memset(channel->key, 0, channel->key_len / 8);
3221 silc_free(channel->key);
3222 silc_cipher_free(channel->channel_key);
3225 /* Create new cipher */
3226 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3231 if (channel->cipher)
3232 silc_free(channel->cipher);
3233 channel->cipher = strdup(cipher);
3236 channel->key_len = tmp_len * 8;
3237 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3238 memcpy(channel->key, tmp, tmp_len);
3239 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3241 /* Generate HMAC key from the channel key data and set it */
3243 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3244 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3245 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3247 memset(hash, 0, sizeof(hash));
3248 memset(tmp, 0, tmp_len);
3250 if (server->server_type == SILC_ROUTER) {
3251 if (!channel->rekey)
3252 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3253 channel->rekey->context = (void *)server;
3254 channel->rekey->channel = channel;
3255 if (channel->rekey->task)
3256 silc_schedule_task_del(server->schedule, channel->rekey->task);
3258 channel->rekey->task =
3259 silc_schedule_task_add(server->schedule, 0,
3260 silc_server_channel_key_rekey,
3261 (void *)channel->rekey, 3600, 0,
3263 SILC_TASK_PRI_NORMAL);
3269 silc_channel_key_payload_free(payload);
3274 /* Heartbeat callback. This function is set as argument for the
3275 silc_socket_set_heartbeat function. The library will call this function
3276 at the set time interval. */
3278 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3281 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3283 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3286 /* Send the heartbeat */
3287 silc_server_send_heartbeat(hb->server, sock);
3290 /* Returns assembled of all servers in the given ID list. The packet's
3291 form is dictated by the New ID payload. */
3293 static void silc_server_announce_get_servers(SilcServer server,
3294 SilcServerEntry remote,
3296 SilcBuffer *servers)
3298 SilcIDCacheList list;
3299 SilcIDCacheEntry id_cache;
3300 SilcServerEntry entry;
3303 /* Go through all clients in the list */
3304 if (silc_idcache_get_all(id_list->servers, &list)) {
3305 if (silc_idcache_list_first(list, &id_cache)) {
3307 entry = (SilcServerEntry)id_cache->context;
3309 /* Do not announce the one we've sending our announcements and
3310 do not announce ourself. */
3311 if (entry == remote || entry == server->id_entry) {
3312 if (!silc_idcache_list_next(list, &id_cache))
3317 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3319 *servers = silc_buffer_realloc(*servers,
3321 (*servers)->truelen + idp->len :
3323 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3324 silc_buffer_put(*servers, idp->data, idp->len);
3325 silc_buffer_pull(*servers, idp->len);
3326 silc_buffer_free(idp);
3328 if (!silc_idcache_list_next(list, &id_cache))
3333 silc_idcache_list_free(list);
3337 /* This function is used by router to announce existing servers to our
3338 primary router when we've connected to it. */
3340 void silc_server_announce_servers(SilcServer server)
3342 SilcBuffer servers = NULL;
3344 SILC_LOG_DEBUG(("Announcing servers"));
3346 /* Get servers in local list */
3347 silc_server_announce_get_servers(server, server->router,
3348 server->local_list, &servers);
3350 /* Get servers in global list */
3351 silc_server_announce_get_servers(server, server->router,
3352 server->global_list, &servers);
3355 silc_buffer_push(servers, servers->data - servers->head);
3356 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3358 /* Send the packet */
3359 silc_server_packet_send(server, server->router->connection,
3360 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3361 servers->data, servers->len, TRUE);
3363 silc_buffer_free(servers);
3367 /* Returns assembled packet of all clients in the given ID list. The
3368 packet's form is dictated by the New ID Payload. */
3370 static void silc_server_announce_get_clients(SilcServer server,
3372 SilcBuffer *clients)
3374 SilcIDCacheList list;
3375 SilcIDCacheEntry id_cache;
3376 SilcClientEntry client;
3379 /* Go through all clients in the list */
3380 if (silc_idcache_get_all(id_list->clients, &list)) {
3381 if (silc_idcache_list_first(list, &id_cache)) {
3383 client = (SilcClientEntry)id_cache->context;
3385 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3387 *clients = silc_buffer_realloc(*clients,
3389 (*clients)->truelen + idp->len :
3391 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3392 silc_buffer_put(*clients, idp->data, idp->len);
3393 silc_buffer_pull(*clients, idp->len);
3394 silc_buffer_free(idp);
3396 if (!silc_idcache_list_next(list, &id_cache))
3401 silc_idcache_list_free(list);
3405 /* This function is used to announce our existing clients to our router
3406 when we've connected to it. */
3408 void silc_server_announce_clients(SilcServer server)
3410 SilcBuffer clients = NULL;
3412 SILC_LOG_DEBUG(("Announcing clients"));
3414 /* Get clients in local list */
3415 silc_server_announce_get_clients(server, server->local_list,
3418 /* As router we announce our global list as well */
3419 if (server->server_type == SILC_ROUTER)
3420 silc_server_announce_get_clients(server, server->global_list,
3424 silc_buffer_push(clients, clients->data - clients->head);
3425 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3427 /* Send the packet */
3428 silc_server_packet_send(server, server->router->connection,
3429 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3430 clients->data, clients->len, TRUE);
3432 silc_buffer_free(clients);
3437 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3443 p = silc_notify_payload_encode(notify, argc, ap);
3449 /* Returns assembled packets for channel users of the `channel'. */
3451 void silc_server_announce_get_channel_users(SilcServer server,
3452 SilcChannelEntry channel,
3453 SilcBuffer *channel_users,
3454 SilcBuffer *channel_users_modes)
3456 SilcChannelClientEntry chl;
3457 SilcHashTableList htl;
3458 SilcBuffer chidp, clidp;
3461 unsigned char mode[4];
3463 SILC_LOG_DEBUG(("Start"));
3465 /* Now find all users on the channel */
3466 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3467 silc_hash_table_list(channel->user_list, &htl);
3468 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3469 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3472 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3473 clidp->data, clidp->len,
3474 chidp->data, chidp->len);
3477 silc_buffer_realloc(*channel_users,
3479 (*channel_users)->truelen + len : len));
3480 silc_buffer_pull_tail(*channel_users,
3481 ((*channel_users)->end -
3482 (*channel_users)->data));
3484 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3485 silc_buffer_pull(*channel_users, len);
3486 silc_buffer_free(tmp);
3488 /* CUMODE notify for mode change on the channel */
3489 SILC_PUT32_MSB(chl->mode, mode);
3490 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3491 3, clidp->data, clidp->len,
3493 clidp->data, clidp->len);
3495 *channel_users_modes =
3496 silc_buffer_realloc(*channel_users_modes,
3497 (*channel_users_modes ?
3498 (*channel_users_modes)->truelen + len : len));
3499 silc_buffer_pull_tail(*channel_users_modes,
3500 ((*channel_users_modes)->end -
3501 (*channel_users_modes)->data));
3503 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3504 silc_buffer_pull(*channel_users_modes, len);
3505 silc_buffer_free(tmp);
3507 silc_buffer_free(clidp);
3509 silc_buffer_free(chidp);
3512 /* Returns assembled packets for all channels and users on those channels
3513 from the given ID List. The packets are in the form dictated by the
3514 New Channel and New Channel User payloads. */
3516 void silc_server_announce_get_channels(SilcServer server,
3518 SilcBuffer *channels,
3519 SilcBuffer *channel_users,
3520 SilcBuffer **channel_users_modes,
3521 uint32 *channel_users_modes_c,
3522 SilcChannelID ***channel_ids)
3524 SilcIDCacheList list;
3525 SilcIDCacheEntry id_cache;
3526 SilcChannelEntry channel;
3531 int i = *channel_users_modes_c;
3533 SILC_LOG_DEBUG(("Start"));
3535 /* Go through all channels in the list */
3536 if (silc_idcache_get_all(id_list->channels, &list)) {
3537 if (silc_idcache_list_first(list, &id_cache)) {
3539 channel = (SilcChannelEntry)id_cache->context;
3541 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3542 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3543 name_len = strlen(channel->channel_name);
3545 len = 4 + name_len + id_len + 4;
3547 silc_buffer_realloc(*channels,
3548 (*channels ? (*channels)->truelen + len : len));
3549 silc_buffer_pull_tail(*channels,
3550 ((*channels)->end - (*channels)->data));
3551 silc_buffer_format(*channels,
3552 SILC_STR_UI_SHORT(name_len),
3553 SILC_STR_UI_XNSTRING(channel->channel_name,
3555 SILC_STR_UI_SHORT(id_len),
3556 SILC_STR_UI_XNSTRING(cid, id_len),
3557 SILC_STR_UI_INT(channel->mode),
3559 silc_buffer_pull(*channels, len);
3561 *channel_users_modes = silc_realloc(*channel_users_modes,
3562 sizeof(**channel_users_modes) *
3564 (*channel_users_modes)[i] = NULL;
3565 *channel_ids = silc_realloc(*channel_ids,
3566 sizeof(**channel_ids) * (i + 1));
3567 (*channel_ids)[i] = NULL;
3568 silc_server_announce_get_channel_users(server, channel,
3570 channel_users_modes[i]);
3571 (*channel_ids)[i] = channel->id;
3574 if (!silc_idcache_list_next(list, &id_cache))
3578 *channel_users_modes_c += i;
3581 silc_idcache_list_free(list);
3585 /* This function is used to announce our existing channels to our router
3586 when we've connected to it. This also announces the users on the
3587 channels to the router. */
3589 void silc_server_announce_channels(SilcServer server)
3591 SilcBuffer channels = NULL, channel_users = NULL;
3592 SilcBuffer *channel_users_modes = NULL;
3593 uint32 channel_users_modes_c = 0;
3594 SilcChannelID **channel_ids = NULL;
3596 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3598 /* Get channels and channel users in local list */
3599 silc_server_announce_get_channels(server, server->local_list,
3600 &channels, &channel_users,
3601 &channel_users_modes,
3602 &channel_users_modes_c,
3605 /* Get channels and channel users in global list */
3606 silc_server_announce_get_channels(server, server->global_list,
3607 &channels, &channel_users,
3608 &channel_users_modes,
3609 &channel_users_modes_c,
3613 silc_buffer_push(channels, channels->data - channels->head);
3614 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3616 /* Send the packet */
3617 silc_server_packet_send(server, server->router->connection,
3618 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3619 channels->data, channels->len,
3622 silc_buffer_free(channels);
3625 if (channel_users) {
3626 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3627 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3628 channel_users->len);
3630 /* Send the packet */
3631 silc_server_packet_send(server, server->router->connection,
3632 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3633 channel_users->data, channel_users->len,
3636 silc_buffer_free(channel_users);
3639 if (channel_users_modes) {
3642 for (i = 0; i < channel_users_modes_c; i++) {
3643 silc_buffer_push(channel_users_modes[i],
3644 channel_users_modes[i]->data -
3645 channel_users_modes[i]->head);
3646 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3647 channel_users_modes[i]->len);
3648 silc_server_packet_send_dest(server, server->router->connection,
3649 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3650 channel_ids[i], SILC_ID_CHANNEL,
3651 channel_users_modes[i]->data,
3652 channel_users_modes[i]->len,
3654 silc_buffer_free(channel_users_modes[i]);
3656 silc_free(channel_users_modes);
3657 silc_free(channel_ids);
3661 /* Failure timeout callback. If this is called then we will immediately
3662 process the received failure. We always process the failure with timeout
3663 since we do not want to blindly trust to received failure packets.
3664 This won't be called (the timeout is cancelled) if the failure was
3665 bogus (it is bogus if remote does not close the connection after sending
3668 SILC_TASK_CALLBACK(silc_server_failure_callback)
3670 SilcServerFailureContext f = (SilcServerFailureContext)context;
3672 if (f->sock->protocol) {
3673 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3674 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3680 /* Assembles user list and users mode list from the `channel'. */
3682 void silc_server_get_users_on_channel(SilcServer server,
3683 SilcChannelEntry channel,
3684 SilcBuffer *user_list,
3685 SilcBuffer *mode_list,
3688 SilcChannelClientEntry chl;
3689 SilcHashTableList htl;
3690 SilcBuffer client_id_list;
3691 SilcBuffer client_mode_list;
3693 uint32 list_count = 0, len = 0;
3695 silc_hash_table_list(channel->user_list, &htl);
3696 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3697 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3699 client_id_list = silc_buffer_alloc(len);
3701 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3702 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3703 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3705 silc_hash_table_list(channel->user_list, &htl);
3706 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3708 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3709 silc_buffer_put(client_id_list, idp->data, idp->len);
3710 silc_buffer_pull(client_id_list, idp->len);
3711 silc_buffer_free(idp);
3713 /* Client's mode on channel */
3714 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3715 silc_buffer_pull(client_mode_list, 4);
3719 silc_buffer_push(client_id_list,
3720 client_id_list->data - client_id_list->head);
3721 silc_buffer_push(client_mode_list,
3722 client_mode_list->data - client_mode_list->head);
3724 *user_list = client_id_list;
3725 *mode_list = client_mode_list;
3726 *user_count = list_count;
3729 /* Saves users and their modes to the `channel'. */
3731 void silc_server_save_users_on_channel(SilcServer server,
3732 SilcSocketConnection sock,
3733 SilcChannelEntry channel,
3734 SilcClientID *noadd,
3735 SilcBuffer user_list,
3736 SilcBuffer mode_list,
3741 for (i = 0; i < user_count; i++) {
3744 SilcClientID *client_id;
3745 SilcClientEntry client;
3748 SILC_GET16_MSB(idp_len, user_list->data + 2);
3750 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3751 silc_buffer_pull(user_list, idp_len);
3756 SILC_GET32_MSB(mode, mode_list->data);
3757 silc_buffer_pull(mode_list, 4);
3759 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3760 silc_free(client_id);
3764 /* Check if we have this client cached already. */
3765 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3766 server->server_type, NULL);
3768 client = silc_idlist_find_client_by_id(server->global_list,
3769 client_id, server->server_type,
3772 /* If router did not find such Client ID in its lists then this must
3773 be bogus client or some router in the net is buggy. */
3774 if (server->server_type == SILC_ROUTER) {
3775 silc_free(client_id);
3779 /* We don't have that client anywhere, add it. The client is added
3780 to global list since server didn't have it in the lists so it must be
3782 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3783 silc_id_dup(client_id, SILC_ID_CLIENT),
3784 sock->user_data, NULL);
3786 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3787 silc_free(client_id);
3791 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3794 silc_free(client_id);
3796 if (!silc_server_client_on_channel(client, channel)) {
3797 /* Client was not on the channel, add it. */
3798 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3799 chl->client = client;
3801 chl->channel = channel;
3802 silc_hash_table_add(channel->user_list, chl->client, chl);
3803 silc_hash_table_add(client->channels, chl->channel, chl);
3808 /* Lookups route to the client indicated by the `id_data'. The connection
3809 object and internal data object is returned. Returns NULL if route
3810 could not be found to the client. If the `client_id' is specified then
3811 it is used and the `id_data' is ignored. */
3813 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3814 unsigned char *id_data,
3816 SilcClientID *client_id,
3817 SilcIDListData *idata)
3820 SilcClientEntry client;
3822 SILC_LOG_DEBUG(("Start"));
3824 /* Decode destination Client ID */
3826 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3828 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3832 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3835 /* If the destination belongs to our server we don't have to route
3836 the packet anywhere but to send it to the local destination. */
3837 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3841 /* If we are router and the client has router then the client is in
3842 our cell but not directly connected to us. */
3843 if (server->server_type == SILC_ROUTER && client->router) {
3844 /* We are of course in this case the client's router thus the route
3845 to the client is the server who owns the client. So, we will send
3846 the packet to that server. */
3848 *idata = (SilcIDListData)client->router;
3849 return client->router->connection;
3852 /* Seems that client really is directly connected to us */
3854 *idata = (SilcIDListData)client;
3855 return client->connection;
3858 /* Destination belongs to someone not in this server. If we are normal
3859 server our action is to send the packet to our router. */
3860 if (server->server_type == SILC_SERVER && !server->standalone) {
3863 *idata = (SilcIDListData)server->router;
3864 return server->router->connection;
3867 /* We are router and we will perform route lookup for the destination
3868 and send the packet to fastest route. */
3869 if (server->server_type == SILC_ROUTER && !server->standalone) {
3870 /* Check first that the ID is valid */
3871 client = silc_idlist_find_client_by_id(server->global_list, id,
3874 SilcSocketConnection dst_sock;
3876 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3880 *idata = (SilcIDListData)dst_sock->user_data;
3889 /* Encodes and returns channel list of channels the `client' has joined.
3890 Secret channels are not put to the list. */
3892 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3893 SilcClientEntry client)
3895 SilcBuffer buffer = NULL;
3896 SilcChannelEntry channel;
3897 SilcChannelClientEntry chl;
3898 SilcHashTableList htl;
3904 silc_hash_table_list(client->channels, &htl);
3905 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3906 channel = chl->channel;
3908 if (channel->mode & SILC_CHANNEL_MODE_SECRET ||
3909 channel->mode & SILC_CHANNEL_MODE_PRIVATE)
3912 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3913 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3914 name_len = strlen(channel->channel_name);
3916 len = 4 + name_len + id_len + 4;
3917 buffer = silc_buffer_realloc(buffer,
3918 (buffer ? (buffer)->truelen + len : len));
3919 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3920 silc_buffer_format(buffer,
3921 SILC_STR_UI_SHORT(name_len),
3922 SILC_STR_UI_XNSTRING(channel->channel_name,
3924 SILC_STR_UI_SHORT(id_len),
3925 SILC_STR_UI_XNSTRING(cid, id_len),
3926 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3928 silc_buffer_pull(buffer, len);
3933 silc_buffer_push(buffer, buffer->data - buffer->head);
3938 /* Finds client entry by Client ID and if it is not found then resolves
3939 it using WHOIS command. */
3941 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3942 SilcClientID *client_id)
3944 SilcClientEntry client;
3946 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3949 client = silc_idlist_find_client_by_id(server->global_list,
3950 client_id, TRUE, NULL);
3951 if (!client && server->server_type == SILC_ROUTER)
3955 if (!client && server->standalone)
3958 if (!client || !client->nickname || !client->username) {
3959 SilcBuffer buffer, idp;
3961 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3962 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3963 client->resolve_cmd_ident = ++server->cmd_ident;
3965 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3966 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3967 server->cmd_ident, 1,
3968 3, idp->data, idp->len);
3969 silc_server_packet_send(server, client ? client->router->connection :
3970 server->router->connection,
3971 SILC_PACKET_COMMAND, 0,
3972 buffer->data, buffer->len, FALSE);
3973 silc_buffer_free(idp);
3974 silc_buffer_free(buffer);
3981 /* A timeout callback for the re-key. We will be the initiator of the
3984 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3986 SilcSocketConnection sock = (SilcSocketConnection)context;
3987 SilcIDListData idata = (SilcIDListData)sock->user_data;
3988 SilcServer server = (SilcServer)idata->rekey->context;
3989 SilcProtocol protocol;
3990 SilcServerRekeyInternalContext *proto_ctx;
3992 SILC_LOG_DEBUG(("Start"));
3994 /* Allocate internal protocol context. This is sent as context
3996 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3997 proto_ctx->server = (void *)server;
3998 proto_ctx->sock = sock;
3999 proto_ctx->responder = FALSE;
4000 proto_ctx->pfs = idata->rekey->pfs;
4002 /* Perform rekey protocol. Will call the final callback after the
4003 protocol is over. */
4004 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
4005 &protocol, proto_ctx, silc_server_rekey_final);
4006 sock->protocol = protocol;
4008 /* Run the protocol */
4009 silc_protocol_execute(protocol, server->schedule, 0, 0);
4011 /* Re-register re-key timeout */
4012 silc_schedule_task_add(server->schedule, sock->sock,
4013 silc_server_rekey_callback,
4014 context, idata->rekey->timeout, 0,
4015 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4018 /* The final callback for the REKEY protocol. This will actually take the
4019 new key material into use. */
4021 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4023 SilcProtocol protocol = (SilcProtocol)context;
4024 SilcServerRekeyInternalContext *ctx =
4025 (SilcServerRekeyInternalContext *)protocol->context;
4026 SilcServer server = (SilcServer)ctx->server;
4027 SilcSocketConnection sock = ctx->sock;
4029 SILC_LOG_DEBUG(("Start"));
4031 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4032 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4033 /* Error occured during protocol */
4034 silc_protocol_cancel(protocol, server->schedule);
4035 silc_protocol_free(protocol);
4036 sock->protocol = NULL;
4038 silc_packet_context_free(ctx->packet);
4040 silc_ske_free(ctx->ske);
4046 silc_protocol_free(protocol);
4047 sock->protocol = NULL;
4049 silc_packet_context_free(ctx->packet);
4051 silc_ske_free(ctx->ske);