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 void *id_entry = NULL;
1220 SILC_LOG_DEBUG(("Start"));
1222 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1223 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1224 /* Error occured during protocol */
1225 silc_protocol_free(protocol);
1226 sock->protocol = NULL;
1228 silc_packet_context_free(ctx->packet);
1230 silc_ske_free(ctx->ske);
1232 silc_free(ctx->dest_id);
1235 sock->protocol = NULL;
1236 silc_schedule_task_del_by_callback(server->schedule,
1237 silc_server_failure_callback);
1238 silc_server_disconnect_remote(server, sock, "Server closed connection: "
1239 "Authentication failed");
1240 server->stat.auth_failures++;
1244 switch (ctx->conn_type) {
1245 case SILC_SOCKET_TYPE_CLIENT:
1247 SilcClientEntry client;
1249 SILC_LOG_DEBUG(("Remote host is client"));
1250 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
1253 /* Add the client to the client ID cache. The nickname and Client ID
1254 and other information is created after we have received NEW_CLIENT
1255 packet from client. */
1256 client = silc_idlist_add_client(server->local_list,
1257 NULL, NULL, NULL, NULL, NULL, sock);
1259 SILC_LOG_ERROR(("Could not add new client to cache"));
1260 silc_free(sock->user_data);
1261 silc_server_disconnect_remote(server, sock,
1262 "Server closed connection: "
1263 "Authentication failed");
1264 server->stat.auth_failures++;
1269 server->stat.my_clients++;
1270 server->stat.clients++;
1271 if (server->server_type == SILC_ROUTER)
1272 server->stat.cell_clients++;
1274 id_entry = (void *)client;
1277 case SILC_SOCKET_TYPE_SERVER:
1278 case SILC_SOCKET_TYPE_ROUTER:
1280 SilcServerEntry new_server;
1281 SilcServerConfigSectionServerConnection *conn =
1282 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1283 ctx->sconfig : ctx->rconfig;
1285 SILC_LOG_DEBUG(("Remote host is %s",
1286 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1287 "server" : "router"));
1288 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
1289 sock->ip, ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1290 "server" : "router"));
1292 /* Add the server into server cache. The server name and Server ID
1293 is updated after we have received NEW_SERVER packet from the
1294 server. We mark ourselves as router for this server if we really
1297 silc_idlist_add_server(server->local_list, NULL,
1298 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1299 SILC_SERVER : SILC_ROUTER, NULL,
1300 ctx->conn_type == SILC_SOCKET_TYPE_SERVER ?
1301 server->id_entry : NULL, sock);
1303 SILC_LOG_ERROR(("Could not add new server to cache"));
1304 silc_free(sock->user_data);
1305 silc_server_disconnect_remote(server, sock,
1306 "Server closed connection: "
1307 "Authentication failed");
1308 server->stat.auth_failures++;
1313 if (ctx->conn_type == SILC_SOCKET_TYPE_SERVER)
1314 server->stat.my_servers++;
1316 server->stat.my_routers++;
1317 server->stat.servers++;
1319 id_entry = (void *)new_server;
1321 /* Check whether this connection is to be our primary router connection
1322 if we dont' already have the primary route. */
1323 if (server->standalone && ctx->conn_type == SILC_SOCKET_TYPE_ROUTER) {
1324 if (silc_server_config_is_primary_route(server->config) &&
1328 SILC_LOG_DEBUG(("We are not standalone server anymore"));
1329 server->standalone = FALSE;
1330 if (!server->id_entry->router) {
1331 server->id_entry->router = id_entry;
1332 server->router = id_entry;
1342 sock->type = ctx->conn_type;
1344 /* Add the common data structure to the ID entry. */
1346 silc_idlist_add_data(id_entry, (SilcIDListData)sock->user_data);
1348 /* Add to sockets internal pointer for fast referencing */
1349 silc_free(sock->user_data);
1350 sock->user_data = id_entry;
1352 /* Connection has been fully established now. Everything is ok. */
1353 SILC_LOG_DEBUG(("New connection authenticated"));
1355 /* Perform keepalive. The `hb_context' will be freed automatically
1356 when finally calling the silc_socket_free function. XXX hardcoded
1358 hb_context = silc_calloc(1, sizeof(*hb_context));
1359 hb_context->server = server;
1360 silc_socket_set_heartbeat(sock, 600, hb_context,
1361 silc_server_perform_heartbeat,
1365 silc_schedule_task_del_by_callback(server->schedule,
1366 silc_server_failure_callback);
1367 silc_protocol_free(protocol);
1369 silc_packet_context_free(ctx->packet);
1371 silc_ske_free(ctx->ske);
1373 silc_free(ctx->dest_id);
1375 sock->protocol = NULL;
1378 /* This function is used to read packets from network and send packets to
1379 network. This is usually a generic task. */
1381 SILC_TASK_CALLBACK(silc_server_packet_process)
1383 SilcServer server = (SilcServer)context;
1384 SilcSocketConnection sock = server->sockets[fd];
1385 SilcIDListData idata;
1386 SilcCipher cipher = NULL;
1387 SilcHmac hmac = NULL;
1393 SILC_LOG_DEBUG(("Processing packet"));
1395 /* Packet sending */
1397 if (type == SILC_TASK_WRITE) {
1398 /* Do not send data to disconnected connection */
1399 if (SILC_IS_DISCONNECTED(sock))
1402 server->stat.packets_sent++;
1404 if (sock->outbuf->data - sock->outbuf->head)
1405 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
1407 /* Send the packet */
1408 ret = silc_packet_send(sock, TRUE);
1410 /* If returned -2 could not write to connection now, will do
1416 SILC_LOG_ERROR(("Error sending packet to connection "
1417 "%s:%d [%s]", sock->hostname, sock->port,
1418 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1419 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1420 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1425 /* The packet has been sent and now it is time to set the connection
1426 back to only for input. When there is again some outgoing data
1427 available for this connection it will be set for output as well.
1428 This call clears the output setting and sets it only for input. */
1429 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, fd);
1430 SILC_UNSET_OUTBUF_PENDING(sock);
1432 silc_buffer_clear(sock->outbuf);
1436 /* Packet receiving */
1438 /* Read some data from connection */
1439 ret = silc_packet_receive(sock);
1443 SILC_LOG_ERROR(("Error receiving packet from connection "
1444 "%s:%d [%s]", sock->hostname, sock->port,
1445 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1446 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1447 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1454 SILC_LOG_DEBUG(("Read EOF"));
1456 /* If connection is disconnecting already we will finally
1457 close the connection */
1458 if (SILC_IS_DISCONNECTING(sock)) {
1459 if (sock->user_data)
1460 silc_server_free_sock_user_data(server, sock);
1461 silc_server_close_connection(server, sock);
1465 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1466 SILC_SET_DISCONNECTING(sock);
1468 /* If the closed connection was our primary router connection the
1469 start re-connecting phase. */
1470 if (!server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER &&
1471 sock == server->router->connection)
1472 silc_schedule_task_add(server->schedule, 0,
1473 silc_server_connect_to_router,
1476 SILC_TASK_PRI_NORMAL);
1478 if (sock->user_data)
1479 silc_server_free_sock_user_data(server, sock);
1480 silc_server_close_connection(server, sock);
1484 /* If connection is disconnecting or disconnected we will ignore
1486 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1487 SILC_LOG_DEBUG(("Ignoring read data from disonnected connection"));
1491 server->stat.packets_received++;
1493 /* Get keys and stuff from ID entry */
1494 idata = (SilcIDListData)sock->user_data;
1496 idata->last_receive = time(NULL);
1497 cipher = idata->receive_key;
1498 hmac = idata->hmac_receive;
1501 /* Process the packet. This will call the parser that will then
1502 decrypt and parse the packet. */
1503 silc_packet_receive_process(sock, cipher, hmac, silc_server_packet_parse,
1507 /* Callback function that the silc_packet_decrypt will call to make the
1508 decision whether the packet is normal or special packet. We will
1509 return TRUE if it is normal and FALSE if it is special */
1511 static int silc_server_packet_decrypt_check(SilcPacketType packet_type,
1513 SilcPacketContext *packet,
1516 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1517 SilcServer server = (SilcServer)parse_ctx->context;
1519 /* Packet is normal packet, if:
1521 1) packet is private message packet and does not have private key set
1522 2) is other packet than channel message packet
1523 3) is channel message packet and remote is router and we are router
1525 all other packets are special packets
1528 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
1529 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
1532 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE ||
1533 (packet_type == SILC_PACKET_CHANNEL_MESSAGE &&
1534 parse_ctx->sock->type == SILC_SOCKET_TYPE_ROUTER &&
1535 server->server_type == SILC_ROUTER))
1541 /* Parses whole packet, received earlier. */
1543 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1545 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1546 SilcServer server = (SilcServer)parse_ctx->context;
1547 SilcSocketConnection sock = parse_ctx->sock;
1548 SilcPacketContext *packet = parse_ctx->packet;
1549 SilcIDListData idata = (SilcIDListData)sock->user_data;
1552 SILC_LOG_DEBUG(("Start"));
1554 /* Decrypt the received packet */
1555 ret = silc_packet_decrypt(idata ? idata->receive_key : NULL,
1556 idata ? idata->hmac_receive : NULL,
1557 packet->buffer, packet,
1558 silc_server_packet_decrypt_check, parse_ctx);
1560 SILC_LOG_WARNING(("Packet decryption failed for connection "
1561 "%s:%d [%s]", sock->hostname, sock->port,
1562 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
1563 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
1564 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
1570 /* Parse the packet. Packet type is returned. */
1571 ret = silc_packet_parse(packet);
1573 /* Parse the packet header in special way as this is "special"
1575 ret = silc_packet_parse_special(packet);
1578 if (ret == SILC_PACKET_NONE)
1581 /* Check that the the current client ID is same as in the client's packet. */
1582 if (sock->type == SILC_SOCKET_TYPE_CLIENT) {
1583 SilcClientEntry client = (SilcClientEntry)sock->user_data;
1584 if (client && client->id) {
1585 void *id = silc_id_str2id(packet->src_id, packet->src_id_len,
1586 packet->src_id_type);
1587 if (!id || !SILC_ID_CLIENT_COMPARE(client->id, id)) {
1595 if (server->server_type == SILC_ROUTER) {
1596 /* Route the packet if it is not destined to us. Other ID types but
1597 server are handled separately after processing them. */
1598 if (!(packet->flags & SILC_PACKET_FLAG_BROADCAST) &&
1599 packet->dst_id_type == SILC_ID_SERVER &&
1600 sock->type != SILC_SOCKET_TYPE_CLIENT &&
1601 memcmp(packet->dst_id, server->id_string, packet->dst_id_len)) {
1603 /* Route the packet to fastest route for the destination ID */
1604 void *id = silc_id_str2id(packet->dst_id, packet->dst_id_len,
1605 packet->dst_id_type);
1608 silc_server_packet_route(server,
1609 silc_server_route_get(server, id,
1610 packet->dst_id_type),
1617 /* Parse the incoming packet type */
1618 silc_server_packet_parse_type(server, sock, packet);
1620 if (server->server_type == SILC_ROUTER) {
1621 /* Broadcast packet if it is marked as broadcast packet and it is
1622 originated from router and we are router. */
1623 if (sock->type == SILC_SOCKET_TYPE_ROUTER &&
1624 packet->flags & SILC_PACKET_FLAG_BROADCAST &&
1625 !server->standalone) {
1626 silc_server_packet_broadcast(server, server->router->connection, packet);
1631 /* silc_buffer_clear(sock->inbuf); */
1632 silc_packet_context_free(packet);
1633 silc_free(parse_ctx);
1636 /* Parser callback called by silc_packet_receive_process. This merely
1637 registers timeout that will handle the actual parsing when appropriate. */
1639 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1641 SilcServer server = (SilcServer)parser_context->context;
1642 SilcSocketConnection sock = parser_context->sock;
1644 switch (sock->type) {
1645 case SILC_SOCKET_TYPE_UNKNOWN:
1646 case SILC_SOCKET_TYPE_CLIENT:
1647 /* Parse the packet with timeout */
1648 silc_schedule_task_add(server->schedule, sock->sock,
1649 silc_server_packet_parse_real,
1650 (void *)parser_context, 0, 100000,
1652 SILC_TASK_PRI_NORMAL);
1654 case SILC_SOCKET_TYPE_SERVER:
1655 case SILC_SOCKET_TYPE_ROUTER:
1656 /* Packets from servers are parsed as soon as possible */
1657 silc_schedule_task_add(server->schedule, sock->sock,
1658 silc_server_packet_parse_real,
1659 (void *)parser_context, 0, 1,
1661 SILC_TASK_PRI_NORMAL);
1668 /* Parses the packet type and calls what ever routines the packet type
1669 requires. This is done for all incoming packets. */
1671 void silc_server_packet_parse_type(SilcServer server,
1672 SilcSocketConnection sock,
1673 SilcPacketContext *packet)
1675 SilcPacketType type = packet->type;
1677 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1679 /* Parse the packet type */
1681 case SILC_PACKET_DISCONNECT:
1682 SILC_LOG_DEBUG(("Disconnect packet"));
1683 if (packet->flags & SILC_PACKET_FLAG_LIST)
1687 case SILC_PACKET_SUCCESS:
1689 * Success received for something. For now we can have only
1690 * one protocol for connection executing at once hence this
1691 * success message is for whatever protocol is executing currently.
1693 SILC_LOG_DEBUG(("Success packet"));
1694 if (packet->flags & SILC_PACKET_FLAG_LIST)
1697 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1700 case SILC_PACKET_FAILURE:
1702 * Failure received for something. For now we can have only
1703 * one protocol for connection executing at once hence this
1704 * failure message is for whatever protocol is executing currently.
1706 SILC_LOG_DEBUG(("Failure packet"));
1707 if (packet->flags & SILC_PACKET_FLAG_LIST)
1709 if (sock->protocol) {
1710 SilcServerFailureContext f;
1711 f = silc_calloc(1, sizeof(*f));
1715 /* We will wait 5 seconds to process this failure packet */
1716 silc_schedule_task_add(server->schedule, sock->sock,
1717 silc_server_failure_callback, (void *)f, 5, 0,
1718 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1722 case SILC_PACKET_REJECT:
1723 SILC_LOG_DEBUG(("Reject packet"));
1724 if (packet->flags & SILC_PACKET_FLAG_LIST)
1729 case SILC_PACKET_NOTIFY:
1731 * Received notify packet. Server can receive notify packets from
1732 * router. Server then relays the notify messages to clients if needed.
1734 SILC_LOG_DEBUG(("Notify packet"));
1735 if (packet->flags & SILC_PACKET_FLAG_LIST)
1736 silc_server_notify_list(server, sock, packet);
1738 silc_server_notify(server, sock, packet);
1744 case SILC_PACKET_CHANNEL_MESSAGE:
1746 * Received channel message. Channel messages are special packets
1747 * (although probably most common ones) thus they are handled
1750 SILC_LOG_DEBUG(("Channel Message packet"));
1751 if (packet->flags & SILC_PACKET_FLAG_LIST)
1753 silc_server_channel_message(server, sock, packet);
1756 case SILC_PACKET_CHANNEL_KEY:
1758 * Received key for channel. As channels are created by the router
1759 * the keys are as well. We will distribute the key to all of our
1760 * locally connected clients on the particular channel. Router
1761 * never receives this channel and thus is ignored.
1763 SILC_LOG_DEBUG(("Channel Key packet"));
1764 if (packet->flags & SILC_PACKET_FLAG_LIST)
1766 silc_server_channel_key(server, sock, packet);
1772 case SILC_PACKET_COMMAND:
1774 * Recived command. Processes the command request and allocates the
1775 * command context and calls the command.
1777 SILC_LOG_DEBUG(("Command packet"));
1778 if (packet->flags & SILC_PACKET_FLAG_LIST)
1780 silc_server_command_process(server, sock, packet);
1783 case SILC_PACKET_COMMAND_REPLY:
1785 * Received command reply packet. Received command reply to command. It
1786 * may be reply to command sent by us or reply to command sent by client
1787 * that we've routed further.
1789 SILC_LOG_DEBUG(("Command Reply packet"));
1790 if (packet->flags & SILC_PACKET_FLAG_LIST)
1792 silc_server_command_reply(server, sock, packet);
1796 * Private Message packets
1798 case SILC_PACKET_PRIVATE_MESSAGE:
1800 * Received private message packet. The packet is coming from either
1803 SILC_LOG_DEBUG(("Private Message packet"));
1804 if (packet->flags & SILC_PACKET_FLAG_LIST)
1806 silc_server_private_message(server, sock, packet);
1809 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1811 * Private message key packet.
1813 if (packet->flags & SILC_PACKET_FLAG_LIST)
1815 silc_server_private_message_key(server, sock, packet);
1819 * Key Exchange protocol packets
1821 case SILC_PACKET_KEY_EXCHANGE:
1822 SILC_LOG_DEBUG(("KE packet"));
1823 if (packet->flags & SILC_PACKET_FLAG_LIST)
1826 if (sock->protocol && sock->protocol->protocol &&
1827 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1829 SilcServerKEInternalContext *proto_ctx =
1830 (SilcServerKEInternalContext *)sock->protocol->context;
1832 proto_ctx->packet = silc_packet_context_dup(packet);
1834 /* Let the protocol handle the packet */
1835 silc_protocol_execute(sock->protocol, server->schedule, 0, 100000);
1837 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1838 "protocol active, packet dropped."));
1842 case SILC_PACKET_KEY_EXCHANGE_1:
1843 SILC_LOG_DEBUG(("KE 1 packet"));
1844 if (packet->flags & SILC_PACKET_FLAG_LIST)
1847 if (sock->protocol && sock->protocol->protocol &&
1848 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1849 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1851 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1852 SilcServerRekeyInternalContext *proto_ctx =
1853 (SilcServerRekeyInternalContext *)sock->protocol->context;
1855 if (proto_ctx->packet)
1856 silc_packet_context_free(proto_ctx->packet);
1858 proto_ctx->packet = silc_packet_context_dup(packet);
1860 /* Let the protocol handle the packet */
1861 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1863 SilcServerKEInternalContext *proto_ctx =
1864 (SilcServerKEInternalContext *)sock->protocol->context;
1866 if (proto_ctx->packet)
1867 silc_packet_context_free(proto_ctx->packet);
1869 proto_ctx->packet = silc_packet_context_dup(packet);
1870 proto_ctx->dest_id_type = packet->src_id_type;
1871 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1872 packet->src_id_type);
1873 if (!proto_ctx->dest_id)
1876 /* Let the protocol handle the packet */
1877 silc_protocol_execute(sock->protocol, server->schedule,
1881 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1882 "protocol active, packet dropped."));
1886 case SILC_PACKET_KEY_EXCHANGE_2:
1887 SILC_LOG_DEBUG(("KE 2 packet"));
1888 if (packet->flags & SILC_PACKET_FLAG_LIST)
1891 if (sock->protocol && sock->protocol->protocol &&
1892 (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_KEY_EXCHANGE ||
1893 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY)) {
1895 if (sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
1896 SilcServerRekeyInternalContext *proto_ctx =
1897 (SilcServerRekeyInternalContext *)sock->protocol->context;
1899 if (proto_ctx->packet)
1900 silc_packet_context_free(proto_ctx->packet);
1902 proto_ctx->packet = silc_packet_context_dup(packet);
1904 /* Let the protocol handle the packet */
1905 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1907 SilcServerKEInternalContext *proto_ctx =
1908 (SilcServerKEInternalContext *)sock->protocol->context;
1910 if (proto_ctx->packet)
1911 silc_packet_context_free(proto_ctx->packet);
1913 proto_ctx->packet = silc_packet_context_dup(packet);
1914 proto_ctx->dest_id_type = packet->src_id_type;
1915 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
1916 packet->src_id_type);
1917 if (!proto_ctx->dest_id)
1920 /* Let the protocol handle the packet */
1921 silc_protocol_execute(sock->protocol, server->schedule,
1925 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1926 "protocol active, packet dropped."));
1930 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1932 * Connection authentication request packet. When we receive this packet
1933 * we will send to the other end information about our mandatory
1934 * authentication method for the connection. This packet maybe received
1937 SILC_LOG_DEBUG(("Connection authentication request packet"));
1938 if (packet->flags & SILC_PACKET_FLAG_LIST)
1940 silc_server_connection_auth_request(server, sock, packet);
1944 * Connection Authentication protocol packets
1946 case SILC_PACKET_CONNECTION_AUTH:
1947 /* Start of the authentication protocol. We receive here the
1948 authentication data and will verify it. */
1949 SILC_LOG_DEBUG(("Connection auth packet"));
1950 if (packet->flags & SILC_PACKET_FLAG_LIST)
1953 if (sock->protocol && sock->protocol->protocol->type
1954 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1956 SilcServerConnAuthInternalContext *proto_ctx =
1957 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1959 proto_ctx->packet = silc_packet_context_dup(packet);
1961 /* Let the protocol handle the packet */
1962 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
1964 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1965 "protocol active, packet dropped."));
1969 case SILC_PACKET_NEW_ID:
1971 * Received New ID packet. This includes some new ID that has been
1972 * created. It may be for client, server or channel. This is the way
1973 * to distribute information about new registered entities in the
1976 SILC_LOG_DEBUG(("New ID packet"));
1977 if (packet->flags & SILC_PACKET_FLAG_LIST)
1978 silc_server_new_id_list(server, sock, packet);
1980 silc_server_new_id(server, sock, packet);
1983 case SILC_PACKET_NEW_CLIENT:
1985 * Received new client packet. This includes client information that
1986 * we will use to create initial client ID. After creating new
1987 * ID we will send it to the client.
1989 SILC_LOG_DEBUG(("New Client packet"));
1990 if (packet->flags & SILC_PACKET_FLAG_LIST)
1992 silc_server_new_client(server, sock, packet);
1995 case SILC_PACKET_NEW_SERVER:
1997 * Received new server packet. This includes Server ID and some other
1998 * information that we may save. This is received after server has
2001 SILC_LOG_DEBUG(("New Server packet"));
2002 if (packet->flags & SILC_PACKET_FLAG_LIST)
2004 silc_server_new_server(server, sock, packet);
2007 case SILC_PACKET_NEW_CHANNEL:
2009 * Received new channel packet. Information about new channel in the
2010 * network are distributed using this packet.
2012 SILC_LOG_DEBUG(("New Channel packet"));
2013 if (packet->flags & SILC_PACKET_FLAG_LIST)
2014 silc_server_new_channel_list(server, sock, packet);
2016 silc_server_new_channel(server, sock, packet);
2019 case SILC_PACKET_HEARTBEAT:
2021 * Received heartbeat.
2023 SILC_LOG_DEBUG(("Heartbeat packet"));
2024 if (packet->flags & SILC_PACKET_FLAG_LIST)
2028 case SILC_PACKET_KEY_AGREEMENT:
2030 * Received heartbeat.
2032 SILC_LOG_DEBUG(("Key agreement packet"));
2033 if (packet->flags & SILC_PACKET_FLAG_LIST)
2035 silc_server_key_agreement(server, sock, packet);
2038 case SILC_PACKET_REKEY:
2040 * Received re-key packet. The sender wants to regenerate the session
2043 SILC_LOG_DEBUG(("Re-key packet"));
2044 if (packet->flags & SILC_PACKET_FLAG_LIST)
2046 silc_server_rekey(server, sock, packet);
2049 case SILC_PACKET_REKEY_DONE:
2051 * The re-key is done.
2053 SILC_LOG_DEBUG(("Re-key done packet"));
2054 if (packet->flags & SILC_PACKET_FLAG_LIST)
2057 if (sock->protocol && sock->protocol->protocol &&
2058 sock->protocol->protocol->type == SILC_PROTOCOL_SERVER_REKEY) {
2060 SilcServerRekeyInternalContext *proto_ctx =
2061 (SilcServerRekeyInternalContext *)sock->protocol->context;
2063 if (proto_ctx->packet)
2064 silc_packet_context_free(proto_ctx->packet);
2066 proto_ctx->packet = silc_packet_context_dup(packet);
2068 /* Let the protocol handle the packet */
2069 silc_protocol_execute(sock->protocol, server->schedule, 0, 0);
2071 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
2072 "protocol active, packet dropped."));
2077 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
2083 /* Creates connection to a remote router. */
2085 void silc_server_create_connection(SilcServer server,
2086 char *remote_host, uint32 port)
2088 SilcServerConnection sconn;
2090 /* Allocate connection object for hold connection specific stuff. */
2091 sconn = silc_calloc(1, sizeof(*sconn));
2092 sconn->server = server;
2093 sconn->remote_host = strdup(remote_host);
2094 sconn->remote_port = port;
2096 silc_schedule_task_add(server->schedule, 0,
2097 silc_server_connect_router,
2098 (void *)sconn, 0, 1, SILC_TASK_TIMEOUT,
2099 SILC_TASK_PRI_NORMAL);
2102 SILC_TASK_CALLBACK(silc_server_close_connection_final)
2104 silc_socket_free((SilcSocketConnection)context);
2107 /* Closes connection to socket connection */
2109 void silc_server_close_connection(SilcServer server,
2110 SilcSocketConnection sock)
2112 SILC_LOG_INFO(("Closing connection %s:%d [%s]", sock->hostname,
2114 (sock->type == SILC_SOCKET_TYPE_UNKNOWN ? "Unknown" :
2115 sock->type == SILC_SOCKET_TYPE_CLIENT ? "Client" :
2116 sock->type == SILC_SOCKET_TYPE_SERVER ? "Server" :
2119 /* We won't listen for this connection anymore */
2120 silc_schedule_unset_listen_fd(server->schedule, sock->sock);
2122 /* Unregister all tasks */
2123 silc_schedule_task_del_by_fd(server->schedule, sock->sock);
2125 /* Close the actual connection */
2126 silc_net_close_connection(sock->sock);
2127 server->sockets[sock->sock] = NULL;
2129 /* If sock->user_data is NULL then we'll check for active protocols
2130 here since the silc_server_free_sock_user_data has not been called
2131 for this connection. */
2132 if (!sock->user_data) {
2133 /* If any protocol is active cancel its execution. It will call
2134 the final callback which will finalize the disconnection. */
2135 if (sock->protocol) {
2136 silc_protocol_cancel(sock->protocol, server->schedule);
2137 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2138 silc_protocol_execute_final(sock->protocol, server->schedule);
2139 sock->protocol = NULL;
2144 silc_schedule_task_add(server->schedule, 0,
2145 silc_server_close_connection_final,
2146 (void *)sock, 0, 1, SILC_TASK_TIMEOUT,
2147 SILC_TASK_PRI_NORMAL);
2150 /* Sends disconnect message to remote connection and disconnects the
2153 void silc_server_disconnect_remote(SilcServer server,
2154 SilcSocketConnection sock,
2155 const char *fmt, ...)
2158 unsigned char buf[4096];
2163 memset(buf, 0, sizeof(buf));
2165 vsprintf(buf, fmt, ap);
2168 SILC_LOG_DEBUG(("Disconnecting remote host"));
2170 /* Notify remote end that the conversation is over. The notify message
2171 is tried to be sent immediately. */
2172 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2173 buf, strlen(buf), TRUE);
2175 /* Mark the connection to be disconnected */
2176 SILC_SET_DISCONNECTED(sock);
2177 silc_server_close_connection(server, sock);
2182 SilcClientEntry client;
2183 } *FreeClientInternal;
2185 SILC_TASK_CALLBACK(silc_server_free_client_data_timeout)
2187 FreeClientInternal i = (FreeClientInternal)context;
2189 silc_idlist_del_data(i->client);
2190 silc_idcache_purge_by_context(i->server->local_list->clients, i->client);
2194 /* Frees client data and notifies about client's signoff. */
2196 void silc_server_free_client_data(SilcServer server,
2197 SilcSocketConnection sock,
2198 SilcClientEntry client,
2202 FreeClientInternal i = silc_calloc(1, sizeof(*i));
2204 /* If there is pending outgoing data for the client then purge it
2205 to the network before removing the client entry. */
2206 if (sock && SILC_IS_OUTBUF_PENDING(sock) &&
2207 (SILC_IS_DISCONNECTED(sock) == FALSE)) {
2208 server->stat.packets_sent++;
2210 if (sock->outbuf->data - sock->outbuf->head)
2211 silc_buffer_push(sock->outbuf, sock->outbuf->data - sock->outbuf->head);
2213 silc_packet_send(sock, TRUE);
2215 SILC_SET_CONNECTION_FOR_INPUT(server->schedule, sock->sock);
2216 SILC_UNSET_OUTBUF_PENDING(sock);
2217 silc_buffer_clear(sock->outbuf);
2220 /* Send SIGNOFF notify to routers. */
2221 if (notify && !server->standalone && server->router)
2222 silc_server_send_notify_signoff(server, server->router->connection,
2223 server->server_type == SILC_SERVER ?
2224 FALSE : TRUE, client->id, signoff);
2226 /* Remove client from all channels */
2228 silc_server_remove_from_channels(server, NULL, client,
2229 TRUE, signoff, TRUE);
2231 silc_server_remove_from_channels(server, NULL, client,
2232 FALSE, NULL, FALSE);
2234 /* We will not delete the client entry right away. We will take it
2235 into history (for WHOWAS command) for 5 minutes */
2238 silc_schedule_task_add(server->schedule, 0,
2239 silc_server_free_client_data_timeout,
2241 SILC_TASK_TIMEOUT, SILC_TASK_PRI_LOW);
2242 client->data.status &= ~SILC_IDLIST_STATUS_REGISTERED;
2243 client->router = NULL;
2244 client->connection = NULL;
2246 /* Free the client entry and everything in it */
2247 server->stat.my_clients--;
2248 server->stat.clients--;
2249 if (server->server_type == SILC_ROUTER)
2250 server->stat.cell_clients--;
2253 /* Frees user_data pointer from socket connection object. This also sends
2254 appropriate notify packets to the network to inform about leaving
2257 void silc_server_free_sock_user_data(SilcServer server,
2258 SilcSocketConnection sock)
2260 SILC_LOG_DEBUG(("Start"));
2262 switch (sock->type) {
2263 case SILC_SOCKET_TYPE_CLIENT:
2265 SilcClientEntry user_data = (SilcClientEntry)sock->user_data;
2266 silc_server_free_client_data(server, sock, user_data, TRUE, NULL);
2269 case SILC_SOCKET_TYPE_SERVER:
2270 case SILC_SOCKET_TYPE_ROUTER:
2272 SilcServerEntry user_data = (SilcServerEntry)sock->user_data;
2274 /* Free all client entries that this server owns as they will
2275 become invalid now as well. */
2277 silc_server_remove_clients_by_server(server, user_data, TRUE);
2279 /* If this was our primary router connection then we're lost to
2280 the outside world. */
2281 if (server->router == user_data) {
2282 server->id_entry->router = NULL;
2283 server->router = NULL;
2284 server->standalone = TRUE;
2287 /* Free the server entry */
2288 silc_idlist_del_data(user_data);
2289 silc_idlist_del_server(server->local_list, user_data);
2290 server->stat.my_servers--;
2291 server->stat.servers--;
2292 if (server->server_type == SILC_ROUTER)
2293 server->stat.cell_servers--;
2298 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2300 silc_idlist_del_data(user_data);
2301 silc_free(user_data);
2306 /* If any protocol is active cancel its execution */
2307 if (sock->protocol) {
2308 silc_protocol_cancel(sock->protocol, server->schedule);
2309 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2310 silc_protocol_execute_final(sock->protocol, server->schedule);
2311 sock->protocol = NULL;
2314 sock->user_data = NULL;
2317 /* Removes the client from channels and possibly removes the channels
2318 as well. After removing those channels that exist, their channel
2319 keys are regnerated. This is called only by the function
2320 silc_server_remove_clients_by_server. */
2322 static void silc_server_remove_clients_channels(SilcServer server,
2323 SilcSocketConnection sock,
2324 SilcClientEntry client,
2325 SilcHashTable channels)
2327 SilcChannelEntry channel;
2328 SilcChannelClientEntry chl;
2329 SilcHashTableList htl;
2332 SILC_LOG_DEBUG(("Start"));
2334 if (!client || !client->id)
2337 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2339 /* Remove the client from all channels. The client is removed from
2340 the channels' user list. */
2341 silc_hash_table_list(client->channels, &htl);
2342 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2343 channel = chl->channel;
2345 /* Remove channel from client's channel list */
2346 silc_hash_table_del(client->channels, channel);
2348 /* Remove channel if there is no users anymore */
2349 if (server->server_type == SILC_ROUTER &&
2350 silc_hash_table_count(channel->user_list) < 2) {
2352 if (silc_hash_table_find(channels, channel, NULL, NULL))
2353 silc_hash_table_del(channels, channel);
2356 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2358 if (!silc_idlist_del_channel(server->local_list, channel))
2359 silc_idlist_del_channel(server->global_list, channel);
2360 server->stat.my_channels--;
2364 /* Remove client from channel's client list */
2365 silc_hash_table_del(channel->user_list, chl->client);
2367 server->stat.my_chanclients--;
2369 /* If there is no global users on the channel anymore mark the channel
2370 as local channel. Do not check if the removed client is local client. */
2371 if (server->server_type == SILC_SERVER && channel->global_users &&
2372 chl->client->router && !silc_server_channel_has_global(channel))
2373 channel->global_users = FALSE;
2375 /* If there is not at least one local user on the channel then we don't
2376 need the channel entry anymore, we can remove it safely. */
2377 if (server->server_type == SILC_SERVER &&
2378 !silc_server_channel_has_local(channel)) {
2380 if (silc_hash_table_find(channels, channel, NULL, NULL))
2381 silc_hash_table_del(channels, channel);
2384 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2386 if (channel->founder_key) {
2387 /* The founder auth data exists, do not remove the channel entry */
2388 SilcChannelClientEntry chl2;
2389 SilcHashTableList htl2;
2393 silc_hash_table_list(channel->user_list, &htl2);
2394 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2395 silc_hash_table_del(chl2->client->channels, channel);
2396 silc_hash_table_del(channel->user_list, chl2->client);
2402 /* Remove the channel entry */
2403 if (!silc_idlist_del_channel(server->local_list, channel))
2404 silc_idlist_del_channel(server->global_list, channel);
2405 server->stat.my_channels--;
2409 /* Add the channel to the the channels list to regenerate the
2411 if (!silc_hash_table_find(channels, channel, NULL, NULL))
2412 silc_hash_table_add(channels, channel, channel);
2415 silc_buffer_free(clidp);
2418 /* This function is used to remove all client entries by the server `entry'.
2419 This is called when the connection is lost to the server. In this case
2420 we must invalidate all the client entries owned by the server `entry'.
2421 If the `server_signoff' is TRUE then the SERVER_SIGNOFF notify is
2422 distributed to our local clients. */
2424 int silc_server_remove_clients_by_server(SilcServer server,
2425 SilcServerEntry entry,
2428 SilcIDCacheList list = NULL;
2429 SilcIDCacheEntry id_cache = NULL;
2430 SilcClientEntry client = NULL;
2432 SilcClientEntry *clients = NULL;
2433 uint32 clients_c = 0;
2434 unsigned char **argv = NULL;
2435 uint32 *argv_lens = NULL, *argv_types = NULL, argc = 0;
2436 SilcHashTableList htl;
2437 SilcChannelEntry channel;
2438 SilcHashTable channels;
2441 SILC_LOG_DEBUG(("Start"));
2443 /* Allocate the hash table that holds the channels that require
2444 channel key re-generation after we've removed this server's clients
2445 from the channels. */
2446 channels = silc_hash_table_alloc(0, silc_hash_ptr, NULL, NULL, NULL,
2449 if (server_signoff) {
2450 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
2451 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2452 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) * (argc + 1));
2453 argv_types = silc_realloc(argv_types, sizeof(*argv_types) * (argc + 1));
2454 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2455 memcpy(argv[argc], idp->data, idp->len);
2456 argv_lens[argc] = idp->len;
2457 argv_types[argc] = argc + 1;
2459 silc_buffer_free(idp);
2462 if (silc_idcache_get_all(server->local_list->clients, &list)) {
2464 if (silc_idcache_list_first(list, &id_cache)) {
2466 client = (SilcClientEntry)id_cache->context;
2467 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2468 if (!silc_idcache_list_next(list, &id_cache))
2474 if (client->router != entry) {
2475 if (server_signoff && client->connection) {
2476 clients = silc_realloc(clients,
2477 sizeof(*clients) * (clients_c + 1));
2478 clients[clients_c] = client;
2482 if (!silc_idcache_list_next(list, &id_cache))
2488 if (server_signoff) {
2489 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2490 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2491 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2493 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2495 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2496 memcpy(argv[argc], idp->data, idp->len);
2497 argv_lens[argc] = idp->len;
2498 argv_types[argc] = argc + 1;
2500 silc_buffer_free(idp);
2503 /* Remove the client entry */
2504 silc_server_remove_clients_channels(server, NULL, client, channels);
2505 silc_idlist_del_client(server->local_list, client);
2507 if (!silc_idcache_list_next(list, &id_cache))
2511 silc_idcache_list_free(list);
2514 if (silc_idcache_get_all(server->global_list->clients, &list)) {
2516 if (silc_idcache_list_first(list, &id_cache)) {
2518 client = (SilcClientEntry)id_cache->context;
2519 if (!(client->data.status & SILC_IDLIST_STATUS_REGISTERED)) {
2520 if (!silc_idcache_list_next(list, &id_cache))
2526 if (client->router != entry) {
2527 if (server_signoff && client->connection) {
2528 clients = silc_realloc(clients,
2529 sizeof(*clients) * (clients_c + 1));
2530 clients[clients_c] = client;
2534 if (!silc_idcache_list_next(list, &id_cache))
2540 if (server_signoff) {
2541 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2542 argv = silc_realloc(argv, sizeof(*argv) * (argc + 1));
2543 argv_lens = silc_realloc(argv_lens, sizeof(*argv_lens) *
2545 argv_types = silc_realloc(argv_types, sizeof(*argv_types) *
2547 argv[argc] = silc_calloc(idp->len, sizeof(*argv[0]));
2548 memcpy(argv[argc], idp->data, idp->len);
2549 argv_lens[argc] = idp->len;
2550 argv_types[argc] = argc + 1;
2552 silc_buffer_free(idp);
2555 /* Remove the client entry */
2556 silc_server_remove_clients_channels(server, NULL, client, channels);
2557 silc_idlist_del_client(server->global_list, client);
2559 if (!silc_idcache_list_next(list, &id_cache))
2563 silc_idcache_list_free(list);
2566 /* Send the SERVER_SIGNOFF notify */
2567 if (server_signoff) {
2570 /* Send SERVER_SIGNOFF notify to our primary router */
2571 if (!server->standalone && server->router &&
2572 server->router != entry) {
2573 args = silc_argument_payload_encode(1, argv, argv_lens,
2575 silc_server_send_notify_args(server,
2576 server->router->connection,
2577 server->server_type == SILC_SERVER ?
2579 SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2581 silc_buffer_free(args);
2584 args = silc_argument_payload_encode(argc, argv, argv_lens,
2586 /* Send to local clients */
2587 for (i = 0; i < clients_c; i++) {
2588 silc_server_send_notify_args(server, clients[i]->connection,
2589 FALSE, SILC_NOTIFY_TYPE_SERVER_SIGNOFF,
2594 silc_buffer_free(args);
2595 for (i = 0; i < argc; i++)
2598 silc_free(argv_lens);
2599 silc_free(argv_types);
2602 /* We must now re-generate the channel key for all channels that had
2603 this server's client(s) on the channel. As they left the channel we
2604 must re-generate the channel key. */
2605 silc_hash_table_list(channels, &htl);
2606 while (silc_hash_table_get(&htl, NULL, (void *)&channel)) {
2607 if (!silc_server_create_channel_key(server, channel, 0))
2610 /* Do not send the channel key if private channel key mode is set */
2611 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY)
2614 silc_server_send_channel_key(server, NULL, channel,
2615 server->server_type == SILC_ROUTER ?
2616 FALSE : !server->standalone);
2618 silc_hash_table_free(channels);
2623 /* Checks whether given channel has global users. If it does this returns
2624 TRUE and FALSE if there is only locally connected clients on the channel. */
2626 int silc_server_channel_has_global(SilcChannelEntry channel)
2628 SilcChannelClientEntry chl;
2629 SilcHashTableList htl;
2631 silc_hash_table_list(channel->user_list, &htl);
2632 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2633 if (chl->client->router)
2640 /* Checks whether given channel has locally connected users. If it does this
2641 returns TRUE and FALSE if there is not one locally connected client. */
2643 int silc_server_channel_has_local(SilcChannelEntry channel)
2645 SilcChannelClientEntry chl;
2646 SilcHashTableList htl;
2648 silc_hash_table_list(channel->user_list, &htl);
2649 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2650 if (!chl->client->router)
2657 /* Removes client from all channels it has joined. This is used when client
2658 connection is disconnected. If the client on a channel is last, the
2659 channel is removed as well. This sends the SIGNOFF notify types. */
2661 void silc_server_remove_from_channels(SilcServer server,
2662 SilcSocketConnection sock,
2663 SilcClientEntry client,
2665 char *signoff_message,
2668 SilcChannelEntry channel;
2669 SilcChannelClientEntry chl;
2670 SilcHashTableList htl;
2673 SILC_LOG_DEBUG(("Start"));
2675 if (!client || !client->id)
2678 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2680 /* Remove the client from all channels. The client is removed from
2681 the channels' user list. */
2682 silc_hash_table_list(client->channels, &htl);
2683 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
2684 channel = chl->channel;
2686 /* Remove channel from client's channel list */
2687 silc_hash_table_del(client->channels, channel);
2689 /* Remove channel if there is no users anymore */
2690 if (server->server_type == SILC_ROUTER &&
2691 silc_hash_table_count(channel->user_list) < 2) {
2693 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2694 if (!silc_idlist_del_channel(server->local_list, channel))
2695 silc_idlist_del_channel(server->global_list, channel);
2696 server->stat.my_channels--;
2700 /* Remove client from channel's client list */
2701 silc_hash_table_del(channel->user_list, chl->client);
2703 server->stat.my_chanclients--;
2705 /* If there is no global users on the channel anymore mark the channel
2706 as local channel. Do not check if the removed client is local client. */
2707 if (server->server_type == SILC_SERVER && channel->global_users &&
2708 chl->client->router && !silc_server_channel_has_global(channel))
2709 channel->global_users = FALSE;
2711 /* If there is not at least one local user on the channel then we don't
2712 need the channel entry anymore, we can remove it safely. */
2713 if (server->server_type == SILC_SERVER &&
2714 !silc_server_channel_has_local(channel)) {
2715 /* Notify about leaving client if this channel has global users. */
2716 if (notify && channel->global_users)
2717 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2718 SILC_NOTIFY_TYPE_SIGNOFF,
2719 signoff_message ? 2 : 1,
2720 clidp->data, clidp->len,
2721 signoff_message, signoff_message ?
2722 strlen(signoff_message) : 0);
2725 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2727 if (channel->founder_key) {
2728 /* The founder auth data exists, do not remove the channel entry */
2729 SilcChannelClientEntry chl2;
2730 SilcHashTableList htl2;
2734 silc_hash_table_list(channel->user_list, &htl2);
2735 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2736 silc_hash_table_del(chl2->client->channels, channel);
2737 silc_hash_table_del(channel->user_list, chl2->client);
2743 /* Remove the channel entry */
2744 if (!silc_idlist_del_channel(server->local_list, channel))
2745 silc_idlist_del_channel(server->global_list, channel);
2746 server->stat.my_channels--;
2750 /* Send notify to channel about client leaving SILC and thus
2751 the entire channel. */
2753 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2754 SILC_NOTIFY_TYPE_SIGNOFF,
2755 signoff_message ? 2 : 1,
2756 clidp->data, clidp->len,
2757 signoff_message, signoff_message ?
2758 strlen(signoff_message) : 0);
2760 if (keygen && !(channel->mode & SILC_CHANNEL_MODE_PRIVKEY)) {
2761 /* Re-generate channel key */
2762 if (!silc_server_create_channel_key(server, channel, 0))
2765 /* Send the channel key to the channel. The key of course is not sent
2766 to the client who was removed from the channel. */
2767 silc_server_send_channel_key(server, client->connection, channel,
2768 server->server_type == SILC_ROUTER ?
2769 FALSE : !server->standalone);
2773 silc_buffer_free(clidp);
2776 /* Removes client from one channel. This is used for example when client
2777 calls LEAVE command to remove itself from the channel. Returns TRUE
2778 if channel still exists and FALSE if the channel is removed when
2779 last client leaves the channel. If `notify' is FALSE notify messages
2782 int silc_server_remove_from_one_channel(SilcServer server,
2783 SilcSocketConnection sock,
2784 SilcChannelEntry channel,
2785 SilcClientEntry client,
2788 SilcChannelClientEntry chl;
2791 SILC_LOG_DEBUG(("Start"));
2793 /* Get the entry to the channel, if this client is not on the channel
2795 if (!silc_hash_table_find(client->channels, channel, NULL, (void *)&chl))
2798 /* Remove the client from the channel. The client is removed from
2799 the channel's user list. */
2801 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2803 /* Remove channel from client's channel list */
2804 silc_hash_table_del(client->channels, chl->channel);
2806 /* Remove channel if there is no users anymore */
2807 if (server->server_type == SILC_ROUTER &&
2808 silc_hash_table_count(channel->user_list) < 2) {
2810 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2811 if (!silc_idlist_del_channel(server->local_list, channel))
2812 silc_idlist_del_channel(server->global_list, channel);
2813 silc_buffer_free(clidp);
2814 server->stat.my_channels--;
2818 /* Remove client from channel's client list */
2819 silc_hash_table_del(channel->user_list, chl->client);
2821 server->stat.my_chanclients--;
2823 /* If there is no global users on the channel anymore mark the channel
2824 as local channel. Do not check if the client is local client. */
2825 if (server->server_type == SILC_SERVER && channel->global_users &&
2826 chl->client->router && !silc_server_channel_has_global(channel))
2827 channel->global_users = FALSE;
2829 /* If there is not at least one local user on the channel then we don't
2830 need the channel entry anymore, we can remove it safely. */
2831 if (server->server_type == SILC_SERVER &&
2832 !silc_server_channel_has_local(channel)) {
2833 /* Notify about leaving client if this channel has global users. */
2834 if (notify && channel->global_users)
2835 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2836 SILC_NOTIFY_TYPE_LEAVE, 1,
2837 clidp->data, clidp->len);
2839 silc_buffer_free(clidp);
2842 silc_schedule_task_del_by_context(server->schedule, channel->rekey);
2844 if (channel->founder_key) {
2845 /* The founder auth data exists, do not remove the channel entry */
2846 SilcChannelClientEntry chl2;
2847 SilcHashTableList htl2;
2851 silc_hash_table_list(channel->user_list, &htl2);
2852 while (silc_hash_table_get(&htl2, NULL, (void *)&chl2)) {
2853 silc_hash_table_del(chl2->client->channels, channel);
2854 silc_hash_table_del(channel->user_list, chl2->client);
2860 /* Remove the channel entry */
2861 if (!silc_idlist_del_channel(server->local_list, channel))
2862 silc_idlist_del_channel(server->global_list, channel);
2863 server->stat.my_channels--;
2867 /* Send notify to channel about client leaving the channel */
2869 silc_server_send_notify_to_channel(server, NULL, channel, FALSE,
2870 SILC_NOTIFY_TYPE_LEAVE, 1,
2871 clidp->data, clidp->len);
2873 silc_buffer_free(clidp);
2877 /* Returns TRUE if the given client is on the channel. FALSE if not.
2878 This works because we assure that the user list on the channel is
2879 always in up to date thus we can only check the channel list from
2880 `client' which is faster than checking the user list from `channel'. */
2882 int silc_server_client_on_channel(SilcClientEntry client,
2883 SilcChannelEntry channel)
2885 if (!client || !channel)
2888 if (silc_hash_table_find(client->channels, channel, NULL, NULL))
2894 /* Timeout callback. This is called if connection is idle or for some
2895 other reason is not responding within some period of time. This
2896 disconnects the remote end. */
2898 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2900 SilcServer server = (SilcServer)context;
2901 SilcSocketConnection sock = server->sockets[fd];
2903 SILC_LOG_DEBUG(("Start"));
2908 /* If we have protocol active we must assure that we call the protocol's
2909 final callback so that all the memory is freed. */
2910 if (sock->protocol) {
2911 sock->protocol->state = SILC_PROTOCOL_STATE_ERROR;
2912 silc_protocol_execute_final(sock->protocol, server->schedule);
2916 if (sock->user_data)
2917 silc_server_free_sock_user_data(server, sock);
2919 silc_server_disconnect_remote(server, sock, "Server closed connection: "
2920 "Connection timeout");
2923 /* Creates new channel. Sends NEW_CHANNEL packet to primary route. This
2924 function may be used only by router. In real SILC network all channels
2925 are created by routers thus this function is never used by normal
2928 SilcChannelEntry silc_server_create_new_channel(SilcServer server,
2929 SilcServerID *router_id,
2935 SilcChannelID *channel_id;
2936 SilcChannelEntry entry;
2940 SILC_LOG_DEBUG(("Creating new channel"));
2943 cipher = SILC_DEFAULT_CIPHER;
2945 hmac = SILC_DEFAULT_HMAC;
2947 /* Allocate cipher */
2948 if (!silc_cipher_alloc(cipher, &key))
2952 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
2953 silc_cipher_free(key);
2957 channel_name = strdup(channel_name);
2959 /* Create the channel */
2960 if (!silc_id_create_channel_id(server, router_id, server->rng,
2962 silc_free(channel_name);
2963 silc_cipher_free(key);
2964 silc_hmac_free(newhmac);
2967 entry = silc_idlist_add_channel(server->local_list, channel_name,
2968 SILC_CHANNEL_MODE_NONE, channel_id,
2969 NULL, key, newhmac);
2971 silc_free(channel_name);
2972 silc_cipher_free(key);
2973 silc_hmac_free(newhmac);
2977 entry->cipher = strdup(cipher);
2978 entry->hmac_name = strdup(hmac);
2980 /* Now create the actual key material */
2981 if (!silc_server_create_channel_key(server, entry,
2982 silc_cipher_get_key_len(key) / 8)) {
2983 silc_free(channel_name);
2984 silc_cipher_free(key);
2985 silc_hmac_free(newhmac);
2986 silc_free(entry->cipher);
2987 silc_free(entry->hmac_name);
2991 /* Notify other routers about the new channel. We send the packet
2992 to our primary route. */
2993 if (broadcast && server->standalone == FALSE)
2994 silc_server_send_new_channel(server, server->router->connection, TRUE,
2995 channel_name, entry->id,
2996 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
2999 server->stat.my_channels++;
3004 /* Same as above but creates the channel with Channel ID `channel_id. */
3007 silc_server_create_new_channel_with_id(SilcServer server,
3011 SilcChannelID *channel_id,
3014 SilcChannelEntry entry;
3018 SILC_LOG_DEBUG(("Creating new channel"));
3021 cipher = SILC_DEFAULT_CIPHER;
3023 hmac = SILC_DEFAULT_HMAC;
3025 /* Allocate cipher */
3026 if (!silc_cipher_alloc(cipher, &key))
3030 if (!silc_hmac_alloc(hmac, NULL, &newhmac)) {
3031 silc_cipher_free(key);
3035 channel_name = strdup(channel_name);
3037 /* Create the channel */
3038 entry = silc_idlist_add_channel(server->local_list, channel_name,
3039 SILC_CHANNEL_MODE_NONE, channel_id,
3040 NULL, key, newhmac);
3042 silc_free(channel_name);
3046 /* Now create the actual key material */
3047 if (!silc_server_create_channel_key(server, entry,
3048 silc_cipher_get_key_len(key) / 8)) {
3049 silc_free(channel_name);
3053 /* Notify other routers about the new channel. We send the packet
3054 to our primary route. */
3055 if (broadcast && server->standalone == FALSE)
3056 silc_server_send_new_channel(server, server->router->connection, TRUE,
3057 channel_name, entry->id,
3058 silc_id_get_len(entry->id, SILC_ID_CHANNEL),
3061 server->stat.my_channels++;
3066 /* Channel's key re-key timeout callback. */
3068 SILC_TASK_CALLBACK(silc_server_channel_key_rekey)
3070 SilcServerChannelRekey rekey = (SilcServerChannelRekey)context;
3071 SilcServer server = (SilcServer)rekey->context;
3075 if (!silc_server_create_channel_key(server, rekey->channel, rekey->key_len))
3078 silc_server_send_channel_key(server, NULL, rekey->channel, FALSE);
3081 /* Generates new channel key. This is used to create the initial channel key
3082 but also to re-generate new key for channel. If `key_len' is provided
3083 it is the bytes of the key length. */
3085 bool silc_server_create_channel_key(SilcServer server,
3086 SilcChannelEntry channel,
3090 unsigned char channel_key[32], hash[32];
3093 SILC_LOG_DEBUG(("Generating channel key"));
3095 if (channel->mode & SILC_CHANNEL_MODE_PRIVKEY) {
3096 SILC_LOG_DEBUG(("Channel has private keys, will not generate new key"));
3100 if (!channel->channel_key)
3101 if (!silc_cipher_alloc(SILC_DEFAULT_CIPHER, &channel->channel_key))
3106 else if (channel->key_len)
3107 len = channel->key_len / 8;
3109 len = silc_cipher_get_key_len(channel->channel_key) / 8;
3111 /* Create channel key */
3112 for (i = 0; i < len; i++) channel_key[i] = silc_rng_get_byte(server->rng);
3115 silc_cipher_set_key(channel->channel_key, channel_key, len * 8);
3117 /* Remove old key if exists */
3119 memset(channel->key, 0, channel->key_len / 8);
3120 silc_free(channel->key);
3124 channel->key_len = len * 8;
3125 channel->key = silc_calloc(len, sizeof(*channel->key));
3126 memcpy(channel->key, channel_key, len);
3127 memset(channel_key, 0, sizeof(channel_key));
3129 /* Generate HMAC key from the channel key data and set it */
3131 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3132 silc_hash_make(channel->hmac->hash, channel->key, len, hash);
3133 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3134 memset(hash, 0, sizeof(hash));
3136 if (server->server_type == SILC_ROUTER) {
3137 if (!channel->rekey)
3138 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3139 channel->rekey->context = (void *)server;
3140 channel->rekey->channel = channel;
3141 channel->rekey->key_len = key_len;
3142 if (channel->rekey->task)
3143 silc_schedule_task_del(server->schedule, channel->rekey->task);
3145 channel->rekey->task =
3146 silc_schedule_task_add(server->schedule, 0,
3147 silc_server_channel_key_rekey,
3148 (void *)channel->rekey, 3600, 0,
3150 SILC_TASK_PRI_NORMAL);
3156 /* Saves the channel key found in the encoded `key_payload' buffer. This
3157 function is used when we receive Channel Key Payload and also when we're
3158 processing JOIN command reply. Returns entry to the channel. */
3160 SilcChannelEntry silc_server_save_channel_key(SilcServer server,
3161 SilcBuffer key_payload,
3162 SilcChannelEntry channel)
3164 SilcChannelKeyPayload payload = NULL;
3165 SilcChannelID *id = NULL;
3166 unsigned char *tmp, hash[32];
3170 SILC_LOG_DEBUG(("Start"));
3172 /* Decode channel key payload */
3173 payload = silc_channel_key_payload_parse(key_payload);
3175 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
3180 /* Get the channel entry */
3183 /* Get channel ID */
3184 tmp = silc_channel_key_get_id(payload, &tmp_len);
3185 id = silc_id_str2id(tmp, tmp_len, SILC_ID_CHANNEL);
3191 channel = silc_idlist_find_channel_by_id(server->local_list, id, NULL);
3193 channel = silc_idlist_find_channel_by_id(server->global_list, id, NULL);
3195 SILC_LOG_ERROR(("Received key for non-existent channel"));
3201 tmp = silc_channel_key_get_key(payload, &tmp_len);
3207 cipher = silc_channel_key_get_cipher(payload, NULL);
3213 /* Remove old key if exists */
3215 memset(channel->key, 0, channel->key_len / 8);
3216 silc_free(channel->key);
3217 silc_cipher_free(channel->channel_key);
3220 /* Create new cipher */
3221 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
3226 if (channel->cipher)
3227 silc_free(channel->cipher);
3228 channel->cipher = strdup(cipher);
3231 channel->key_len = tmp_len * 8;
3232 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
3233 memcpy(channel->key, tmp, tmp_len);
3234 silc_cipher_set_key(channel->channel_key, tmp, channel->key_len);
3236 /* Generate HMAC key from the channel key data and set it */
3238 silc_hmac_alloc(SILC_DEFAULT_HMAC, NULL, &channel->hmac);
3239 silc_hash_make(channel->hmac->hash, tmp, tmp_len, hash);
3240 silc_hmac_set_key(channel->hmac, hash, silc_hash_len(channel->hmac->hash));
3242 memset(hash, 0, sizeof(hash));
3243 memset(tmp, 0, tmp_len);
3245 if (server->server_type == SILC_ROUTER) {
3246 if (!channel->rekey)
3247 channel->rekey = silc_calloc(1, sizeof(*channel->rekey));
3248 channel->rekey->context = (void *)server;
3249 channel->rekey->channel = channel;
3250 if (channel->rekey->task)
3251 silc_schedule_task_del(server->schedule, channel->rekey->task);
3253 channel->rekey->task =
3254 silc_schedule_task_add(server->schedule, 0,
3255 silc_server_channel_key_rekey,
3256 (void *)channel->rekey, 3600, 0,
3258 SILC_TASK_PRI_NORMAL);
3264 silc_channel_key_payload_free(payload);
3269 /* Heartbeat callback. This function is set as argument for the
3270 silc_socket_set_heartbeat function. The library will call this function
3271 at the set time interval. */
3273 void silc_server_perform_heartbeat(SilcSocketConnection sock,
3276 SilcServerHBContext hb = (SilcServerHBContext)hb_context;
3278 SILC_LOG_DEBUG(("Sending heartbeat to %s (%s)", sock->hostname,
3281 /* Send the heartbeat */
3282 silc_server_send_heartbeat(hb->server, sock);
3285 /* Returns assembled of all servers in the given ID list. The packet's
3286 form is dictated by the New ID payload. */
3288 static void silc_server_announce_get_servers(SilcServer server,
3289 SilcServerEntry remote,
3291 SilcBuffer *servers)
3293 SilcIDCacheList list;
3294 SilcIDCacheEntry id_cache;
3295 SilcServerEntry entry;
3298 /* Go through all clients in the list */
3299 if (silc_idcache_get_all(id_list->servers, &list)) {
3300 if (silc_idcache_list_first(list, &id_cache)) {
3302 entry = (SilcServerEntry)id_cache->context;
3304 /* Do not announce the one we've sending our announcements and
3305 do not announce ourself. */
3306 if (entry == remote || entry == server->id_entry) {
3307 if (!silc_idcache_list_next(list, &id_cache))
3312 idp = silc_id_payload_encode(entry->id, SILC_ID_SERVER);
3314 *servers = silc_buffer_realloc(*servers,
3316 (*servers)->truelen + idp->len :
3318 silc_buffer_pull_tail(*servers, ((*servers)->end - (*servers)->data));
3319 silc_buffer_put(*servers, idp->data, idp->len);
3320 silc_buffer_pull(*servers, idp->len);
3321 silc_buffer_free(idp);
3323 if (!silc_idcache_list_next(list, &id_cache))
3328 silc_idcache_list_free(list);
3332 /* This function is used by router to announce existing servers to our
3333 primary router when we've connected to it. */
3335 void silc_server_announce_servers(SilcServer server)
3337 SilcBuffer servers = NULL;
3339 SILC_LOG_DEBUG(("Announcing servers"));
3341 /* Get servers in local list */
3342 silc_server_announce_get_servers(server, server->router,
3343 server->local_list, &servers);
3345 /* Get servers in global list */
3346 silc_server_announce_get_servers(server, server->router,
3347 server->global_list, &servers);
3350 silc_buffer_push(servers, servers->data - servers->head);
3351 SILC_LOG_HEXDUMP(("servers"), servers->data, servers->len);
3353 /* Send the packet */
3354 silc_server_packet_send(server, server->router->connection,
3355 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3356 servers->data, servers->len, TRUE);
3358 silc_buffer_free(servers);
3362 /* Returns assembled packet of all clients in the given ID list. The
3363 packet's form is dictated by the New ID Payload. */
3365 static void silc_server_announce_get_clients(SilcServer server,
3367 SilcBuffer *clients)
3369 SilcIDCacheList list;
3370 SilcIDCacheEntry id_cache;
3371 SilcClientEntry client;
3374 /* Go through all clients in the list */
3375 if (silc_idcache_get_all(id_list->clients, &list)) {
3376 if (silc_idcache_list_first(list, &id_cache)) {
3378 client = (SilcClientEntry)id_cache->context;
3380 idp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
3382 *clients = silc_buffer_realloc(*clients,
3384 (*clients)->truelen + idp->len :
3386 silc_buffer_pull_tail(*clients, ((*clients)->end - (*clients)->data));
3387 silc_buffer_put(*clients, idp->data, idp->len);
3388 silc_buffer_pull(*clients, idp->len);
3389 silc_buffer_free(idp);
3391 if (!silc_idcache_list_next(list, &id_cache))
3396 silc_idcache_list_free(list);
3400 /* This function is used to announce our existing clients to our router
3401 when we've connected to it. */
3403 void silc_server_announce_clients(SilcServer server)
3405 SilcBuffer clients = NULL;
3407 SILC_LOG_DEBUG(("Announcing clients"));
3409 /* Get clients in local list */
3410 silc_server_announce_get_clients(server, server->local_list,
3413 /* As router we announce our global list as well */
3414 if (server->server_type == SILC_ROUTER)
3415 silc_server_announce_get_clients(server, server->global_list,
3419 silc_buffer_push(clients, clients->data - clients->head);
3420 SILC_LOG_HEXDUMP(("clients"), clients->data, clients->len);
3422 /* Send the packet */
3423 silc_server_packet_send(server, server->router->connection,
3424 SILC_PACKET_NEW_ID, SILC_PACKET_FLAG_LIST,
3425 clients->data, clients->len, TRUE);
3427 silc_buffer_free(clients);
3432 silc_server_announce_encode_notify(SilcNotifyType notify, uint32 argc, ...)
3438 p = silc_notify_payload_encode(notify, argc, ap);
3444 /* Returns assembled packets for channel users of the `channel'. */
3446 void silc_server_announce_get_channel_users(SilcServer server,
3447 SilcChannelEntry channel,
3448 SilcBuffer *channel_users,
3449 SilcBuffer *channel_users_modes)
3451 SilcChannelClientEntry chl;
3452 SilcHashTableList htl;
3453 SilcBuffer chidp, clidp;
3456 unsigned char mode[4];
3458 SILC_LOG_DEBUG(("Start"));
3460 /* Now find all users on the channel */
3461 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
3462 silc_hash_table_list(channel->user_list, &htl);
3463 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3464 clidp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3467 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_JOIN, 2,
3468 clidp->data, clidp->len,
3469 chidp->data, chidp->len);
3472 silc_buffer_realloc(*channel_users,
3474 (*channel_users)->truelen + len : len));
3475 silc_buffer_pull_tail(*channel_users,
3476 ((*channel_users)->end -
3477 (*channel_users)->data));
3479 silc_buffer_put(*channel_users, tmp->data, tmp->len);
3480 silc_buffer_pull(*channel_users, len);
3481 silc_buffer_free(tmp);
3483 /* CUMODE notify for mode change on the channel */
3484 SILC_PUT32_MSB(chl->mode, mode);
3485 tmp = silc_server_announce_encode_notify(SILC_NOTIFY_TYPE_CUMODE_CHANGE,
3486 3, clidp->data, clidp->len,
3488 clidp->data, clidp->len);
3490 *channel_users_modes =
3491 silc_buffer_realloc(*channel_users_modes,
3492 (*channel_users_modes ?
3493 (*channel_users_modes)->truelen + len : len));
3494 silc_buffer_pull_tail(*channel_users_modes,
3495 ((*channel_users_modes)->end -
3496 (*channel_users_modes)->data));
3498 silc_buffer_put(*channel_users_modes, tmp->data, tmp->len);
3499 silc_buffer_pull(*channel_users_modes, len);
3500 silc_buffer_free(tmp);
3502 silc_buffer_free(clidp);
3504 silc_buffer_free(chidp);
3507 /* Returns assembled packets for all channels and users on those channels
3508 from the given ID List. The packets are in the form dictated by the
3509 New Channel and New Channel User payloads. */
3511 void silc_server_announce_get_channels(SilcServer server,
3513 SilcBuffer *channels,
3514 SilcBuffer *channel_users,
3515 SilcBuffer **channel_users_modes,
3516 uint32 *channel_users_modes_c,
3517 SilcChannelID ***channel_ids)
3519 SilcIDCacheList list;
3520 SilcIDCacheEntry id_cache;
3521 SilcChannelEntry channel;
3526 int i = *channel_users_modes_c;
3528 SILC_LOG_DEBUG(("Start"));
3530 /* Go through all channels in the list */
3531 if (silc_idcache_get_all(id_list->channels, &list)) {
3532 if (silc_idcache_list_first(list, &id_cache)) {
3534 channel = (SilcChannelEntry)id_cache->context;
3536 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3537 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3538 name_len = strlen(channel->channel_name);
3540 len = 4 + name_len + id_len + 4;
3542 silc_buffer_realloc(*channels,
3543 (*channels ? (*channels)->truelen + len : len));
3544 silc_buffer_pull_tail(*channels,
3545 ((*channels)->end - (*channels)->data));
3546 silc_buffer_format(*channels,
3547 SILC_STR_UI_SHORT(name_len),
3548 SILC_STR_UI_XNSTRING(channel->channel_name,
3550 SILC_STR_UI_SHORT(id_len),
3551 SILC_STR_UI_XNSTRING(cid, id_len),
3552 SILC_STR_UI_INT(channel->mode),
3554 silc_buffer_pull(*channels, len);
3556 *channel_users_modes = silc_realloc(*channel_users_modes,
3557 sizeof(**channel_users_modes) *
3559 (*channel_users_modes)[i] = NULL;
3560 *channel_ids = silc_realloc(*channel_ids,
3561 sizeof(**channel_ids) * (i + 1));
3562 (*channel_ids)[i] = NULL;
3563 silc_server_announce_get_channel_users(server, channel,
3565 channel_users_modes[i]);
3566 (*channel_ids)[i] = channel->id;
3569 if (!silc_idcache_list_next(list, &id_cache))
3573 *channel_users_modes_c += i;
3576 silc_idcache_list_free(list);
3580 /* This function is used to announce our existing channels to our router
3581 when we've connected to it. This also announces the users on the
3582 channels to the router. */
3584 void silc_server_announce_channels(SilcServer server)
3586 SilcBuffer channels = NULL, channel_users = NULL;
3587 SilcBuffer *channel_users_modes = NULL;
3588 uint32 channel_users_modes_c = 0;
3589 SilcChannelID **channel_ids = NULL;
3591 SILC_LOG_DEBUG(("Announcing channels and channel users"));
3593 /* Get channels and channel users in local list */
3594 silc_server_announce_get_channels(server, server->local_list,
3595 &channels, &channel_users,
3596 &channel_users_modes,
3597 &channel_users_modes_c,
3600 /* Get channels and channel users in global list */
3601 silc_server_announce_get_channels(server, server->global_list,
3602 &channels, &channel_users,
3603 &channel_users_modes,
3604 &channel_users_modes_c,
3608 silc_buffer_push(channels, channels->data - channels->head);
3609 SILC_LOG_HEXDUMP(("channels"), channels->data, channels->len);
3611 /* Send the packet */
3612 silc_server_packet_send(server, server->router->connection,
3613 SILC_PACKET_NEW_CHANNEL, SILC_PACKET_FLAG_LIST,
3614 channels->data, channels->len,
3617 silc_buffer_free(channels);
3620 if (channel_users) {
3621 silc_buffer_push(channel_users, channel_users->data - channel_users->head);
3622 SILC_LOG_HEXDUMP(("channel users"), channel_users->data,
3623 channel_users->len);
3625 /* Send the packet */
3626 silc_server_packet_send(server, server->router->connection,
3627 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3628 channel_users->data, channel_users->len,
3631 silc_buffer_free(channel_users);
3634 if (channel_users_modes) {
3637 for (i = 0; i < channel_users_modes_c; i++) {
3638 silc_buffer_push(channel_users_modes[i],
3639 channel_users_modes[i]->data -
3640 channel_users_modes[i]->head);
3641 SILC_LOG_HEXDUMP(("channel users modes"), channel_users_modes[i]->data,
3642 channel_users_modes[i]->len);
3643 silc_server_packet_send_dest(server, server->router->connection,
3644 SILC_PACKET_NOTIFY, SILC_PACKET_FLAG_LIST,
3645 channel_ids[i], SILC_ID_CHANNEL,
3646 channel_users_modes[i]->data,
3647 channel_users_modes[i]->len,
3649 silc_buffer_free(channel_users_modes[i]);
3651 silc_free(channel_users_modes);
3652 silc_free(channel_ids);
3656 /* Failure timeout callback. If this is called then we will immediately
3657 process the received failure. We always process the failure with timeout
3658 since we do not want to blindly trust to received failure packets.
3659 This won't be called (the timeout is cancelled) if the failure was
3660 bogus (it is bogus if remote does not close the connection after sending
3663 SILC_TASK_CALLBACK(silc_server_failure_callback)
3665 SilcServerFailureContext f = (SilcServerFailureContext)context;
3667 if (f->sock->protocol) {
3668 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
3669 silc_protocol_execute(f->sock->protocol, f->server->schedule, 0, 0);
3675 /* Assembles user list and users mode list from the `channel'. */
3677 void silc_server_get_users_on_channel(SilcServer server,
3678 SilcChannelEntry channel,
3679 SilcBuffer *user_list,
3680 SilcBuffer *mode_list,
3683 SilcChannelClientEntry chl;
3684 SilcHashTableList htl;
3685 SilcBuffer client_id_list;
3686 SilcBuffer client_mode_list;
3688 uint32 list_count = 0, len = 0;
3690 silc_hash_table_list(channel->user_list, &htl);
3691 while (silc_hash_table_get(&htl, NULL, (void *)&chl))
3692 len += (silc_id_get_len(chl->client->id, SILC_ID_CLIENT) + 4);
3694 client_id_list = silc_buffer_alloc(len);
3696 silc_buffer_alloc(4 * silc_hash_table_count(channel->user_list));
3697 silc_buffer_pull_tail(client_id_list, SILC_BUFFER_END(client_id_list));
3698 silc_buffer_pull_tail(client_mode_list, SILC_BUFFER_END(client_mode_list));
3700 silc_hash_table_list(channel->user_list, &htl);
3701 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3703 idp = silc_id_payload_encode(chl->client->id, SILC_ID_CLIENT);
3704 silc_buffer_put(client_id_list, idp->data, idp->len);
3705 silc_buffer_pull(client_id_list, idp->len);
3706 silc_buffer_free(idp);
3708 /* Client's mode on channel */
3709 SILC_PUT32_MSB(chl->mode, client_mode_list->data);
3710 silc_buffer_pull(client_mode_list, 4);
3714 silc_buffer_push(client_id_list,
3715 client_id_list->data - client_id_list->head);
3716 silc_buffer_push(client_mode_list,
3717 client_mode_list->data - client_mode_list->head);
3719 *user_list = client_id_list;
3720 *mode_list = client_mode_list;
3721 *user_count = list_count;
3724 /* Saves users and their modes to the `channel'. */
3726 void silc_server_save_users_on_channel(SilcServer server,
3727 SilcSocketConnection sock,
3728 SilcChannelEntry channel,
3729 SilcClientID *noadd,
3730 SilcBuffer user_list,
3731 SilcBuffer mode_list,
3736 for (i = 0; i < user_count; i++) {
3739 SilcClientID *client_id;
3740 SilcClientEntry client;
3743 SILC_GET16_MSB(idp_len, user_list->data + 2);
3745 client_id = silc_id_payload_parse_id(user_list->data, idp_len);
3746 silc_buffer_pull(user_list, idp_len);
3751 SILC_GET32_MSB(mode, mode_list->data);
3752 silc_buffer_pull(mode_list, 4);
3754 if (noadd && SILC_ID_CLIENT_COMPARE(client_id, noadd)) {
3755 silc_free(client_id);
3759 /* Check if we have this client cached already. */
3760 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3761 server->server_type, NULL);
3763 client = silc_idlist_find_client_by_id(server->global_list,
3764 client_id, server->server_type,
3767 /* If router did not find such Client ID in its lists then this must
3768 be bogus client or some router in the net is buggy. */
3769 if (server->server_type == SILC_ROUTER) {
3770 silc_free(client_id);
3774 /* We don't have that client anywhere, add it. The client is added
3775 to global list since server didn't have it in the lists so it must be
3777 client = silc_idlist_add_client(server->global_list, NULL, NULL, NULL,
3778 silc_id_dup(client_id, SILC_ID_CLIENT),
3779 sock->user_data, NULL);
3781 SILC_LOG_ERROR(("Could not add new client to the ID Cache"));
3782 silc_free(client_id);
3786 client->data.status |= SILC_IDLIST_STATUS_REGISTERED;
3789 silc_free(client_id);
3791 if (!silc_server_client_on_channel(client, channel)) {
3792 /* Client was not on the channel, add it. */
3793 SilcChannelClientEntry chl = silc_calloc(1, sizeof(*chl));
3794 chl->client = client;
3796 chl->channel = channel;
3797 silc_hash_table_add(channel->user_list, chl->client, chl);
3798 silc_hash_table_add(client->channels, chl->channel, chl);
3803 /* Lookups route to the client indicated by the `id_data'. The connection
3804 object and internal data object is returned. Returns NULL if route
3805 could not be found to the client. If the `client_id' is specified then
3806 it is used and the `id_data' is ignored. */
3808 SilcSocketConnection silc_server_get_client_route(SilcServer server,
3809 unsigned char *id_data,
3811 SilcClientID *client_id,
3812 SilcIDListData *idata)
3815 SilcClientEntry client;
3817 SILC_LOG_DEBUG(("Start"));
3819 /* Decode destination Client ID */
3821 id = silc_id_str2id(id_data, id_len, SILC_ID_CLIENT);
3823 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
3827 id = silc_id_dup(client_id, SILC_ID_CLIENT);
3830 /* If the destination belongs to our server we don't have to route
3831 the packet anywhere but to send it to the local destination. */
3832 client = silc_idlist_find_client_by_id(server->local_list, id, TRUE, NULL);
3836 /* If we are router and the client has router then the client is in
3837 our cell but not directly connected to us. */
3838 if (server->server_type == SILC_ROUTER && client->router) {
3839 /* We are of course in this case the client's router thus the route
3840 to the client is the server who owns the client. So, we will send
3841 the packet to that server. */
3843 *idata = (SilcIDListData)client->router;
3844 return client->router->connection;
3847 /* Seems that client really is directly connected to us */
3849 *idata = (SilcIDListData)client;
3850 return client->connection;
3853 /* Destination belongs to someone not in this server. If we are normal
3854 server our action is to send the packet to our router. */
3855 if (server->server_type == SILC_SERVER && !server->standalone) {
3858 *idata = (SilcIDListData)server->router;
3859 return server->router->connection;
3862 /* We are router and we will perform route lookup for the destination
3863 and send the packet to fastest route. */
3864 if (server->server_type == SILC_ROUTER && !server->standalone) {
3865 /* Check first that the ID is valid */
3866 client = silc_idlist_find_client_by_id(server->global_list, id,
3869 SilcSocketConnection dst_sock;
3871 dst_sock = silc_server_route_get(server, id, SILC_ID_CLIENT);
3875 *idata = (SilcIDListData)dst_sock->user_data;
3884 /* Encodes and returns channel list of channels the `client' has joined.
3885 Secret channels are not put to the list. */
3887 SilcBuffer silc_server_get_client_channel_list(SilcServer server,
3888 SilcClientEntry client)
3890 SilcBuffer buffer = NULL;
3891 SilcChannelEntry channel;
3892 SilcChannelClientEntry chl;
3893 SilcHashTableList htl;
3899 silc_hash_table_list(client->channels, &htl);
3900 while (silc_hash_table_get(&htl, NULL, (void *)&chl)) {
3901 channel = chl->channel;
3903 if (channel->mode & SILC_CHANNEL_MODE_SECRET)
3906 cid = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
3907 id_len = silc_id_get_len(channel->id, SILC_ID_CHANNEL);
3908 name_len = strlen(channel->channel_name);
3910 len = 4 + name_len + id_len + 4;
3911 buffer = silc_buffer_realloc(buffer,
3912 (buffer ? (buffer)->truelen + len : len));
3913 silc_buffer_pull_tail(buffer, ((buffer)->end - (buffer)->data));
3914 silc_buffer_format(buffer,
3915 SILC_STR_UI_SHORT(name_len),
3916 SILC_STR_UI_XNSTRING(channel->channel_name,
3918 SILC_STR_UI_SHORT(id_len),
3919 SILC_STR_UI_XNSTRING(cid, id_len),
3920 SILC_STR_UI_INT(chl->mode), /* Client's mode */
3922 silc_buffer_pull(buffer, len);
3927 silc_buffer_push(buffer, buffer->data - buffer->head);
3932 /* Finds client entry by Client ID and if it is not found then resolves
3933 it using WHOIS command. */
3935 SilcClientEntry silc_server_get_client_resolve(SilcServer server,
3936 SilcClientID *client_id)
3938 SilcClientEntry client;
3940 client = silc_idlist_find_client_by_id(server->local_list, client_id,
3943 client = silc_idlist_find_client_by_id(server->global_list,
3944 client_id, TRUE, NULL);
3945 if (!client && server->server_type == SILC_ROUTER)
3949 if (!client && server->standalone)
3952 if (!client || !client->nickname || !client->username) {
3953 SilcBuffer buffer, idp;
3955 client->data.status |= SILC_IDLIST_STATUS_RESOLVING;
3956 client->data.status &= ~SILC_IDLIST_STATUS_RESOLVED;
3957 client->resolve_cmd_ident = ++server->cmd_ident;
3959 idp = silc_id_payload_encode(client_id, SILC_ID_CLIENT);
3960 buffer = silc_command_payload_encode_va(SILC_COMMAND_WHOIS,
3961 server->cmd_ident, 1,
3962 3, idp->data, idp->len);
3963 silc_server_packet_send(server, client ? client->router->connection :
3964 server->router->connection,
3965 SILC_PACKET_COMMAND, 0,
3966 buffer->data, buffer->len, FALSE);
3967 silc_buffer_free(idp);
3968 silc_buffer_free(buffer);
3975 /* A timeout callback for the re-key. We will be the initiator of the
3978 SILC_TASK_CALLBACK(silc_server_rekey_callback)
3980 SilcSocketConnection sock = (SilcSocketConnection)context;
3981 SilcIDListData idata = (SilcIDListData)sock->user_data;
3982 SilcServer server = (SilcServer)idata->rekey->context;
3983 SilcProtocol protocol;
3984 SilcServerRekeyInternalContext *proto_ctx;
3986 SILC_LOG_DEBUG(("Start"));
3988 /* Allocate internal protocol context. This is sent as context
3990 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
3991 proto_ctx->server = (void *)server;
3992 proto_ctx->sock = sock;
3993 proto_ctx->responder = FALSE;
3994 proto_ctx->pfs = idata->rekey->pfs;
3996 /* Perform rekey protocol. Will call the final callback after the
3997 protocol is over. */
3998 silc_protocol_alloc(SILC_PROTOCOL_SERVER_REKEY,
3999 &protocol, proto_ctx, silc_server_rekey_final);
4000 sock->protocol = protocol;
4002 /* Run the protocol */
4003 silc_protocol_execute(protocol, server->schedule, 0, 0);
4005 /* Re-register re-key timeout */
4006 silc_schedule_task_add(server->schedule, sock->sock,
4007 silc_server_rekey_callback,
4008 context, idata->rekey->timeout, 0,
4009 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
4012 /* The final callback for the REKEY protocol. This will actually take the
4013 new key material into use. */
4015 SILC_TASK_CALLBACK_GLOBAL(silc_server_rekey_final)
4017 SilcProtocol protocol = (SilcProtocol)context;
4018 SilcServerRekeyInternalContext *ctx =
4019 (SilcServerRekeyInternalContext *)protocol->context;
4020 SilcServer server = (SilcServer)ctx->server;
4021 SilcSocketConnection sock = ctx->sock;
4023 SILC_LOG_DEBUG(("Start"));
4025 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
4026 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
4027 /* Error occured during protocol */
4028 silc_protocol_cancel(protocol, server->schedule);
4029 silc_protocol_free(protocol);
4030 sock->protocol = NULL;
4032 silc_packet_context_free(ctx->packet);
4034 silc_ske_free(ctx->ske);
4040 silc_protocol_free(protocol);
4041 sock->protocol = NULL;
4043 silc_packet_context_free(ctx->packet);
4045 silc_ske_free(ctx->ske);