5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2000 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_to_router);
32 SILC_TASK_CALLBACK(silc_server_connect_to_router_second);
33 SILC_TASK_CALLBACK(silc_server_connect_to_router_final);
34 SILC_TASK_CALLBACK(silc_server_accept_new_connection);
35 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second);
36 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final);
37 SILC_TASK_CALLBACK(silc_server_packet_process);
38 SILC_TASK_CALLBACK(silc_server_packet_parse_real);
39 SILC_TASK_CALLBACK(silc_server_timeout_remote);
41 extern char *server_version;
43 /* Allocates a new SILC server object. This has to be done before the server
44 can be used. After allocation one must call silc_server_init to initialize
45 the server. The new allocated server object is returned to the new_server
48 int silc_server_alloc(SilcServer *new_server)
52 SILC_LOG_DEBUG(("Allocating new server object"));
54 server = silc_calloc(1, sizeof(*server));
55 server->server_type = SILC_SERVER;
56 server->standalone = FALSE;
57 server->local_list = silc_calloc(1, sizeof(*server->local_list));
58 server->global_list = silc_calloc(1, sizeof(*server->global_list));
65 /* Free's the SILC server object. This is called at the very end before
68 void silc_server_free(SilcServer server)
71 if (server->local_list)
72 silc_free(server->local_list);
73 if (server->global_list)
74 silc_free(server->global_list);
76 silc_rng_free(server->rng);
78 silc_math_primegen_uninit(); /* XXX */
83 /* Initializes the entire SILC server. This is called always before running
84 the server. This is called only once at the initialization of the program.
85 This binds the server to its listenning port. After this function returns
86 one should call silc_server_run to start the server. This returns TRUE
87 when everything is ok to run the server. Configuration file must be
88 read and parsed before calling this. */
90 int silc_server_init(SilcServer server)
92 int *sock = NULL, sock_count = 0, i;
94 SilcServerEntry id_entry;
96 SILC_LOG_DEBUG(("Initializing server"));
98 assert(server->config);
100 /* Set log files where log message should be saved. */
101 server->config->server = server;
102 silc_config_server_setlogfiles(server->config);
104 /* Register all configured ciphers, PKCS and hash functions. */
105 silc_config_server_register_ciphers(server->config);
106 silc_config_server_register_pkcs(server->config);
107 silc_config_server_register_hashfuncs(server->config);
109 /* Initialize random number generator for the server. */
110 server->rng = silc_rng_alloc();
111 silc_rng_init(server->rng);
112 silc_math_primegen_init(); /* XXX */
114 /* Initialize hash functions for server to use */
115 silc_hash_alloc("md5", &server->md5hash);
116 silc_hash_alloc("sha1", &server->sha1hash);
118 /* Initialize none cipher */
119 silc_cipher_alloc("none", &server->none_cipher);
121 /* XXXXX Generate RSA key pair */
123 unsigned char *public_key;
124 unsigned char *private_key;
125 unsigned int pk_len, prv_len;
128 if (stat("pubkey.pub", &st) < 0 && stat("privkey.prv", &st) < 0) {
130 if (silc_pkcs_alloc("rsa", &server->pkcs) == FALSE) {
131 SILC_LOG_ERROR(("Could not create RSA key pair"));
135 if (server->pkcs->pkcs->init(server->pkcs->context,
136 1024, server->rng) == FALSE) {
137 SILC_LOG_ERROR(("Could not generate RSA key pair"));
141 public_key = server->pkcs->pkcs->get_public_key(server->pkcs->context,
143 private_key = server->pkcs->pkcs->get_private_key(server->pkcs->context,
146 SILC_LOG_HEXDUMP(("public key"), public_key, pk_len);
147 SILC_LOG_HEXDUMP(("private key"), private_key, prv_len);
150 silc_pkcs_public_key_alloc("rsa", "UN=root, HN=dummy",
152 server->private_key =
153 silc_pkcs_private_key_alloc("rsa", private_key, prv_len);
156 silc_pkcs_save_public_key("pubkey.pub", server->public_key,
158 silc_pkcs_save_private_key("privkey.prv", server->private_key, NULL,
161 memset(public_key, 0, pk_len);
162 memset(private_key, 0, prv_len);
163 silc_free(public_key);
164 silc_free(private_key);
166 silc_pkcs_load_public_key("pubkey.pub", &server->public_key,
168 silc_pkcs_load_private_key("privkey.prv", &server->private_key,
173 /* Create a listening server. Note that our server can listen on
174 multiple ports. All listeners are created here and now. */
175 /* XXX Still check this whether to use server_info or listen_port. */
177 while(server->config->listen_port) {
180 tmp = silc_net_create_server(server->config->listen_port->port,
181 server->config->listen_port->host);
185 sock = silc_realloc(sock, (sizeof(int *) * (sock_count + 1)));
186 sock[sock_count] = tmp;
187 server->config->listen_port = server->config->listen_port->next;
191 /* Initialize ID caches */
192 server->local_list->clients = silc_idcache_alloc(0);
193 server->local_list->servers = silc_idcache_alloc(0);
194 server->local_list->channels = silc_idcache_alloc(0);
196 /* XXX for now these are allocated for normal server as well as these
197 hold some global information that the server has fetched from its
198 router. For router these are used as they are supposed to be used
199 on router. The XXX can be remoevd later if this is the way we are
200 going to do this in the normal server as well. */
201 server->global_list->clients = silc_idcache_alloc(0);
202 server->global_list->servers = silc_idcache_alloc(0);
203 server->global_list->channels = silc_idcache_alloc(0);
205 /* Allocate the entire socket list that is used in server. Eventually
206 all connections will have entry in this table (it is a table of
207 pointers to the actual object that is allocated individually
209 server->sockets = silc_calloc(SILC_SERVER_MAX_CONNECTIONS,
210 sizeof(*server->sockets));
212 for (i = 0; i < sock_count; i++) {
213 SilcSocketConnection newsocket = NULL;
215 /* Set socket to non-blocking mode */
216 silc_net_set_socket_nonblock(sock[i]);
217 server->sock = sock[i];
219 /* Create a Server ID for the server. */
220 silc_id_create_server_id(sock[i], server->rng, &id);
226 server->id_type = SILC_ID_SERVER;
227 server->server_name = server->config->server_info->server_name;
229 /* Add ourselves to the server list. We don't have a router yet
230 beacuse we haven't established a route yet. It will be done later.
231 For now, NULL is sent as router. This allocates new entry to
234 silc_idlist_add_server(server->local_list,
235 server->config->server_info->server_name,
236 server->server_type, server->id, NULL,
237 server->send_key, server->receive_key,
238 NULL, NULL, NULL, NULL);
240 SILC_LOG_ERROR(("Could not add ourselves to cache"));
244 /* Add ourselves also to the socket table. The entry allocated above
245 is sent as argument for fast referencing in the future. */
246 silc_socket_alloc(sock[i], SILC_SOCKET_TYPE_SERVER, id_entry,
251 server->sockets[sock[i]] = newsocket;
253 /* Put the allocated socket pointer also to the entry allocated above
254 for fast back-referencing to the socket list. */
255 id_entry->connection = (void *)server->sockets[sock[i]];
256 server->id_entry = id_entry;
259 /* Register the task queues. In SILC we have by default three task queues.
260 One task queue for non-timeout tasks which perform different kind of
261 I/O on file descriptors, timeout task queue for timeout tasks, and,
262 generic non-timeout task queue whose tasks apply to all connections. */
263 silc_task_queue_alloc(&server->io_queue, TRUE);
264 if (!server->io_queue) {
267 silc_task_queue_alloc(&server->timeout_queue, TRUE);
268 if (!server->timeout_queue) {
271 silc_task_queue_alloc(&server->generic_queue, TRUE);
272 if (!server->generic_queue) {
276 /* Register protocols */
277 silc_server_protocols_register();
279 /* Initialize the scheduler */
280 silc_schedule_init(&server->io_queue, &server->timeout_queue,
281 &server->generic_queue,
282 SILC_SERVER_MAX_CONNECTIONS);
284 /* Add the first task to the queue. This is task that is executed by
285 timeout. It expires as soon as the caller calls silc_server_run. This
286 task performs authentication protocol and key exchange with our
288 if (silc_task_register(server->timeout_queue, sock[0],
289 silc_server_connect_to_router,
290 (void *)server, 0, 1,
292 SILC_TASK_PRI_NORMAL) == NULL) {
296 /* If server connections has been configured then we must be router as
297 normal server cannot have server connections, only router connections. */
298 if (server->config->servers)
299 server->server_type = SILC_ROUTER;
301 SILC_LOG_DEBUG(("Server initialized"));
303 /* We are done here, return succesfully */
307 silc_task_queue_free(server->timeout_queue);
309 silc_task_queue_free(server->io_queue);
311 for (i = 0; i < sock_count; i++)
312 silc_net_close_server(sock[i]);
317 /* Stops the SILC server. This function is used to shutdown the server.
318 This is usually called after the scheduler has returned. After stopping
319 the server one should call silc_server_free. */
321 void silc_server_stop(SilcServer server)
323 SILC_LOG_DEBUG(("Stopping server"));
325 /* Stop the scheduler, although it might be already stopped. This
326 doesn't hurt anyone. This removes all the tasks and task queues,
328 silc_schedule_stop();
329 silc_schedule_uninit();
331 silc_server_protocols_unregister();
333 SILC_LOG_DEBUG(("Server stopped"));
336 /* The heart of the server. This runs the scheduler thus runs the server. */
338 void silc_server_run(SilcServer server)
340 SILC_LOG_DEBUG(("Running server"));
342 /* Start the scheduler, the heart of the SILC server. When this returns
343 the program will be terminated. */
347 /* This function connects to our primary router or if we are a router this
348 establishes all our primary routes. This is called at the start of the
349 server to do authentication and key exchange with our router - called
352 SILC_TASK_CALLBACK(silc_server_connect_to_router)
354 SilcServer server = (SilcServer)context;
355 SilcSocketConnection newsocket;
358 SILC_LOG_DEBUG(("Connecting to router(s)"));
360 /* if we are normal SILC server we need to connect to our cell's
362 if (server->server_type == SILC_SERVER) {
363 SilcProtocol protocol;
364 SilcServerKEInternalContext *proto_ctx;
366 /* Create connection to the router, if configured. */
367 if (server->config->routers) {
368 sock = silc_net_create_connection(server->config->routers->port,
369 server->config->routers->host);
371 SILC_LOG_ERROR(("Could not connect to router"));
372 silc_schedule_stop();
376 /* Set socket options */
377 silc_net_set_socket_nonblock(sock);
378 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
380 /* Create socket connection for the connection. Even though we
381 know that we are connecting to a router we will mark the socket
382 to be unknown connection until we have executed authentication
384 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
385 server->sockets[sock] = newsocket;
386 newsocket->hostname = server->config->routers->host;
387 newsocket->port = server->config->routers->port;
389 /* Allocate internal protocol context. This is sent as context
391 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
392 proto_ctx->server = context;
393 proto_ctx->sock = newsocket;
394 proto_ctx->rng = server->rng;
395 proto_ctx->responder = FALSE;
397 /* Perform key exchange protocol. silc_server_connect_to_router_second
398 will be called after the protocol is finished. */
399 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
400 &protocol, proto_ctx,
401 silc_server_connect_to_router_second);
402 newsocket->protocol = protocol;
404 /* Register a timeout task that will be executed if the protocol
405 is not executed within 60 seconds. For now, this is a hard coded
406 limit. After 60 secs the connection will be closed if the key
407 exchange protocol has not been executed. */
408 proto_ctx->timeout_task =
409 silc_task_register(server->timeout_queue, sock,
410 silc_server_timeout_remote,
415 /* Register the connection for network input and output. This sets
416 that scheduler will listen for incoming packets for this connection
417 and sets that outgoing packets may be sent to this connection as
418 well. However, this doesn't set the scheduler for outgoing traffic,
419 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
420 later when outgoing data is available. */
421 SILC_REGISTER_CONNECTION_FOR_IO(sock);
423 /* Run the protocol */
424 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
429 /* if we are a SILC router we need to establish all of our primary
431 if (server->server_type == SILC_ROUTER) {
432 SilcConfigServerSectionServerConnection *ptr;
434 /* Create the connections to all our routes */
435 ptr = server->config->routers;
437 SilcProtocol protocol;
438 SilcServerKEInternalContext *proto_ctx;
440 /* Create the connection to the remote end */
441 sock = silc_net_create_connection(ptr->port, ptr->host);
443 SILC_LOG_ERROR(("Could not connect to router"));
444 silc_schedule_stop();
448 /* Set socket options */
449 silc_net_set_socket_nonblock(sock);
450 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
452 /* Create socket connection for the connection. Even though we
453 know that we are connecting to a router we will mark the socket
454 to be unknown connection until we have executed authentication
456 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
457 server->sockets[sock] = newsocket;
458 newsocket->hostname = ptr->host;
459 newsocket->port = ptr->port;
461 /* Allocate internal protocol context. This is sent as context
463 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
464 proto_ctx->server = context;
465 proto_ctx->sock = newsocket;
466 proto_ctx->rng = server->rng;
467 proto_ctx->responder = FALSE;
469 /* Perform key exchange protocol. silc_server_connect_to_router_final
470 will be called after the protocol is finished. */
471 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
472 &protocol, proto_ctx,
473 silc_server_connect_to_router_second);
474 newsocket->protocol = protocol;
476 /* Register a timeout task that will be executed if the protocol
477 is not executed within 60 seconds. For now, this is a hard coded
478 limit. After 60 secs the connection will be closed if the key
479 exchange protocol has not been executed. */
480 proto_ctx->timeout_task =
481 silc_task_register(server->timeout_queue, sock,
482 silc_server_timeout_remote,
487 /* Register the connection for network input and output. This sets
488 that scheduler will listen for incoming packets for this connection
489 and sets that outgoing packets may be sent to this connection as
490 well. However, this doesn't set the scheduler for outgoing traffic,
491 it will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
492 later when outgoing data is available. */
493 SILC_REGISTER_CONNECTION_FOR_IO(sock);
495 /* Run the protocol */
496 protocol->execute(server->timeout_queue, 0, protocol, sock, 0, 0);
505 SILC_LOG_DEBUG(("No router(s), server will be standalone"));
507 /* There wasn't a configured router, we will continue but we don't
508 have a connection to outside world. We will be standalone server. */
509 server->standalone = TRUE;
511 /* Add a task to the queue. This task receives new connections to the
512 server. This task remains on the queue until the end of the program. */
513 if (silc_task_register(server->io_queue, fd,
514 silc_server_accept_new_connection,
515 (void *)server, 0, 0,
517 SILC_TASK_PRI_NORMAL) == NULL) {
518 silc_schedule_stop();
523 /* Second part of connecting to router(s). Key exchange protocol has been
524 executed and now we will execute authentication protocol. */
526 SILC_TASK_CALLBACK(silc_server_connect_to_router_second)
528 SilcProtocol protocol = (SilcProtocol)context;
529 SilcServerKEInternalContext *ctx =
530 (SilcServerKEInternalContext *)protocol->context;
531 SilcServer server = (SilcServer)ctx->server;
532 SilcSocketConnection sock = NULL;
533 SilcServerConnAuthInternalContext *proto_ctx;
535 SILC_LOG_DEBUG(("Start"));
537 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
538 /* Error occured during protocol */
539 silc_protocol_free(protocol);
541 silc_buffer_free(ctx->packet);
543 silc_ske_free(ctx->ske);
545 silc_free(ctx->dest_id);
547 sock->protocol = NULL;
548 silc_server_disconnect_remote(server, sock, "Server closed connection: "
549 "Key exchange failed");
553 /* Allocate internal context for the authentication protocol. This
554 is sent as context for the protocol. */
555 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
556 proto_ctx->server = (void *)server;
557 proto_ctx->sock = sock = server->sockets[fd];
558 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
559 proto_ctx->dest_id_type = ctx->dest_id_type;
560 proto_ctx->dest_id = ctx->dest_id;
562 /* Resolve the authentication method used in this connection */
563 proto_ctx->auth_meth = SILC_PROTOCOL_CONN_AUTH_PASSWORD;
564 if (server->config->routers) {
565 SilcConfigServerSectionServerConnection *conn = NULL;
567 /* Check if we find a match from user configured connections */
568 conn = silc_config_server_find_router_conn(server->config,
572 /* Match found. Use the configured authentication method */
573 proto_ctx->auth_meth = conn->auth_meth;
574 if (conn->auth_data) {
575 proto_ctx->auth_data = strdup(conn->auth_data);
576 proto_ctx->auth_data_len = strlen(conn->auth_data);
579 /* No match found. */
586 /* Free old protocol as it is finished now */
587 silc_protocol_free(protocol);
589 silc_buffer_free(ctx->packet);
591 sock->protocol = NULL;
593 /* Allocate the authentication protocol. This is allocated here
594 but we won't start it yet. We will be receiving party of this
595 protocol thus we will wait that connecting party will make
597 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
598 &sock->protocol, proto_ctx,
599 silc_server_connect_to_router_final);
601 /* Register timeout task. If the protocol is not executed inside
602 this timelimit the connection will be terminated. Currently
603 this is 15 seconds and is hard coded limit (XXX). */
604 proto_ctx->timeout_task =
605 silc_task_register(server->timeout_queue, sock->sock,
606 silc_server_timeout_remote,
607 (void *)server, 15, 0,
611 /* Run the protocol */
612 sock->protocol->execute(server->timeout_queue, 0,
613 sock->protocol, sock->sock, 0, 0);
616 /* Finalizes the connection to router. Registers a server task to the
617 queue so that we can accept new connections. */
619 SILC_TASK_CALLBACK(silc_server_connect_to_router_final)
621 SilcProtocol protocol = (SilcProtocol)context;
622 SilcServerConnAuthInternalContext *ctx =
623 (SilcServerConnAuthInternalContext *)protocol->context;
624 SilcServer server = (SilcServer)ctx->server;
625 SilcSocketConnection sock = ctx->sock;
626 SilcServerEntry id_entry;
627 SilcUnknownEntry conn_data;
629 unsigned char *id_string;
631 SILC_LOG_DEBUG(("Start"));
633 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
634 /* Error occured during protocol */
635 silc_protocol_free(protocol);
637 silc_buffer_free(ctx->packet);
639 silc_ske_free(ctx->ske);
641 silc_free(ctx->dest_id);
643 sock->protocol = NULL;
644 silc_server_disconnect_remote(server, sock, "Server closed connection: "
645 "Authentication failed");
649 /* Add a task to the queue. This task receives new connections to the
650 server. This task remains on the queue until the end of the program. */
651 if (!server->listenning) {
652 if (silc_task_register(server->io_queue, server->sock,
653 silc_server_accept_new_connection,
654 (void *)server, 0, 0,
656 SILC_TASK_PRI_NORMAL) == NULL) {
657 silc_schedule_stop();
660 server->listenning = TRUE;
664 /* Send NEW_SERVER packet to the router. We will become registered
665 to the SILC network after sending this packet. */
666 id_string = silc_id_id2str(server->id, SILC_ID_SERVER);
667 packet = silc_buffer_alloc(2 + 2 + SILC_ID_SERVER_LEN +
668 strlen(server->server_name));
669 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
670 silc_buffer_format(packet,
671 SILC_STR_UI_SHORT(SILC_ID_SERVER_LEN),
672 SILC_STR_UI_XNSTRING(id_string, SILC_ID_SERVER_LEN),
673 SILC_STR_UI_SHORT(strlen(server->server_name)),
674 SILC_STR_UI_XNSTRING(server->server_name,
675 strlen(server->server_name)),
678 /* Send the packet */
679 silc_server_packet_send(server, ctx->sock, SILC_PACKET_NEW_SERVER, 0,
680 packet->data, packet->len, TRUE);
681 silc_buffer_free(packet);
682 silc_free(id_string);
684 SILC_LOG_DEBUG(("Connected to router %s", sock->hostname));
686 /* Add the connected router to local server list */
687 server->standalone = FALSE;
688 conn_data = (SilcUnknownEntry)sock->user_data;
690 silc_idlist_add_server(server->local_list,
691 sock->hostname ? sock->hostname : sock->ip,
692 SILC_ROUTER, ctx->dest_id, NULL,
693 conn_data->send_key, conn_data->receive_key,
694 conn_data->pkcs, conn_data->hmac, NULL, sock);
696 id_entry->hmac_key = conn_data->hmac_key;
697 id_entry->hmac_key_len = conn_data->hmac_key_len;
698 sock->user_data = (void *)id_entry;
699 sock->type = SILC_SOCKET_TYPE_ROUTER;
700 server->id_entry->router = id_entry;
703 /* Free the temporary connection data context from key exchange */
704 silc_free(conn_data);
706 /* Free the protocol object */
707 silc_protocol_free(protocol);
709 silc_buffer_free(ctx->packet);
711 silc_ske_free(ctx->ske);
713 sock->protocol = NULL;
716 /* Accepts new connections to the server. Accepting new connections are
717 done in three parts to make it async. */
719 SILC_TASK_CALLBACK(silc_server_accept_new_connection)
721 SilcServer server = (SilcServer)context;
722 SilcSocketConnection newsocket;
723 SilcServerKEInternalContext *proto_ctx;
726 SILC_LOG_DEBUG(("Accepting new connection"));
728 sock = silc_net_accept_connection(server->sock);
730 SILC_LOG_ERROR(("Could not accept new connection: %s", strerror(errno)));
734 /* Check max connections */
735 if (sock > SILC_SERVER_MAX_CONNECTIONS) {
736 if (server->config->redirect) {
737 /* XXX Redirecting connection to somewhere else now?? */
738 /*silc_server_send_notify("Server is full, trying to redirect..."); */
740 SILC_LOG_ERROR(("Refusing connection, server is full"));
745 /* Set socket options */
746 silc_net_set_socket_nonblock(sock);
747 silc_net_set_socket_opt(sock, SOL_SOCKET, SO_REUSEADDR, 1);
749 /* We don't create a ID yet, since we don't know what type of connection
750 this is yet. But, we do add the connection to the socket table. */
751 silc_socket_alloc(sock, SILC_SOCKET_TYPE_UNKNOWN, NULL, &newsocket);
752 server->sockets[sock] = newsocket;
754 /* XXX This MUST be done async as this will block the entire server
755 process. Either we have to do our own resolver stuff or in the future
756 we can use threads. */
757 /* Perform mandatory name and address lookups for the remote host. */
758 silc_net_check_host_by_sock(sock, &newsocket->hostname, &newsocket->ip);
759 if (!newsocket->ip || !newsocket->hostname) {
760 SILC_LOG_DEBUG(("IP lookup/DNS lookup failed"));
761 SILC_LOG_ERROR(("IP lookup/DNS lookup failed"));
765 SILC_LOG_INFO(("Incoming connection from %s (%s)", newsocket->hostname,
768 /* Allocate internal context for key exchange protocol. This is
769 sent as context for the protocol. */
770 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
771 proto_ctx->server = context;
772 proto_ctx->sock = newsocket;
773 proto_ctx->rng = server->rng;
774 proto_ctx->responder = TRUE;
776 /* Prepare the connection for key exchange protocol. We allocate the
777 protocol but will not start it yet. The connector will be the
778 initiator of the protocol thus we will wait for initiation from
779 there before we start the protocol. */
780 silc_protocol_alloc(SILC_PROTOCOL_SERVER_KEY_EXCHANGE,
781 &newsocket->protocol, proto_ctx,
782 silc_server_accept_new_connection_second);
784 /* Register a timeout task that will be executed if the connector
785 will not start the key exchange protocol within 60 seconds. For
786 now, this is a hard coded limit. After 60 secs the connection will
787 be closed if the key exchange protocol has not been started. */
788 proto_ctx->timeout_task =
789 silc_task_register(server->timeout_queue, newsocket->sock,
790 silc_server_timeout_remote,
795 /* Register the connection for network input and output. This sets
796 that scheduler will listen for incoming packets for this connection
797 and sets that outgoing packets may be sent to this connection as well.
798 However, this doesn't set the scheduler for outgoing traffic, it
799 will be set separately by calling SILC_SET_CONNECTION_FOR_OUTPUT,
800 later when outgoing data is available. */
801 SILC_REGISTER_CONNECTION_FOR_IO(sock);
804 /* Second part of accepting new connection. Key exchange protocol has been
805 performed and now it is time to do little connection authentication
806 protocol to figure out whether this connection is client or server
807 and whether it has right to access this server (especially server
808 connections needs to be authenticated). */
810 SILC_TASK_CALLBACK(silc_server_accept_new_connection_second)
812 SilcProtocol protocol = (SilcProtocol)context;
813 SilcServerKEInternalContext *ctx =
814 (SilcServerKEInternalContext *)protocol->context;
815 SilcServer server = (SilcServer)ctx->server;
816 SilcSocketConnection sock = NULL;
817 SilcServerConnAuthInternalContext *proto_ctx;
819 SILC_LOG_DEBUG(("Start"));
821 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
822 /* Error occured during protocol */
823 silc_protocol_free(protocol);
825 silc_buffer_free(ctx->packet);
827 silc_ske_free(ctx->ske);
829 silc_free(ctx->dest_id);
832 sock->protocol = NULL;
833 silc_server_disconnect_remote(server, sock, "Server closed connection: "
834 "Key exchange failed");
838 /* Allocate internal context for the authentication protocol. This
839 is sent as context for the protocol. */
840 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
841 proto_ctx->server = (void *)server;
842 proto_ctx->sock = sock = server->sockets[fd];
843 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
844 proto_ctx->responder = TRUE;
845 proto_ctx->dest_id_type = ctx->dest_id_type;
846 proto_ctx->dest_id = ctx->dest_id;
848 /* Free old protocol as it is finished now */
849 silc_protocol_free(protocol);
851 silc_buffer_free(ctx->packet);
853 sock->protocol = NULL;
855 /* Allocate the authentication protocol. This is allocated here
856 but we won't start it yet. We will be receiving party of this
857 protocol thus we will wait that connecting party will make
859 silc_protocol_alloc(SILC_PROTOCOL_SERVER_CONNECTION_AUTH,
860 &sock->protocol, proto_ctx,
861 silc_server_accept_new_connection_final);
863 /* Register timeout task. If the protocol is not executed inside
864 this timelimit the connection will be terminated. Currently
865 this is 60 seconds and is hard coded limit (XXX). */
866 proto_ctx->timeout_task =
867 silc_task_register(server->timeout_queue, sock->sock,
868 silc_server_timeout_remote,
869 (void *)server, 60, 0,
874 /* Final part of accepting new connection. The connection has now
875 been authenticated and keys has been exchanged. We also know whether
876 this is client or server connection. */
878 SILC_TASK_CALLBACK(silc_server_accept_new_connection_final)
880 SilcProtocol protocol = (SilcProtocol)context;
881 SilcServerConnAuthInternalContext *ctx =
882 (SilcServerConnAuthInternalContext *)protocol->context;
883 SilcServer server = (SilcServer)ctx->server;
884 SilcSocketConnection sock = ctx->sock;
886 SILC_LOG_DEBUG(("Start"));
888 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
889 /* Error occured during protocol */
890 silc_protocol_free(protocol);
892 silc_buffer_free(ctx->packet);
894 silc_ske_free(ctx->ske);
896 silc_free(ctx->dest_id);
899 sock->protocol = NULL;
900 silc_server_disconnect_remote(server, sock, "Server closed connection: "
901 "Authentication failed");
905 sock->type = ctx->conn_type;
907 case SILC_SOCKET_TYPE_CLIENT:
909 SilcClientEntry client;
910 SilcUnknownEntry conn_data = (SilcUnknownEntry)sock->user_data;
912 SILC_LOG_DEBUG(("Remote host is client"));
913 SILC_LOG_INFO(("Connection from %s (%s) is client", sock->hostname,
916 /* Add the client to the client ID cache. The nickname and Client ID
917 and other information is created after we have received NEW_CLIENT
918 packet from client. */
920 silc_idlist_add_client(server->local_list, NULL, NULL, NULL, NULL,
921 NULL, conn_data->send_key,
922 conn_data->receive_key, conn_data->pkcs,
923 conn_data->hmac, NULL, sock);
925 SILC_LOG_ERROR(("Could not add new client to cache"));
926 silc_free(conn_data);
930 /* Free the temporary connection data context from key exchange */
931 silc_free(conn_data);
933 /* Add to sockets internal pointer for fast referencing */
934 sock->user_data = (void *)client;
937 case SILC_SOCKET_TYPE_SERVER:
938 case SILC_SOCKET_TYPE_ROUTER:
940 SilcServerEntry new_server;
941 SilcUnknownEntry conn_data = (SilcUnknownEntry)sock->user_data;
943 SILC_LOG_DEBUG(("Remote host is %s",
944 sock->type == SILC_SOCKET_TYPE_SERVER ?
945 "server" : "router"));
946 SILC_LOG_INFO(("Connection from %s (%s) is %s", sock->hostname,
947 sock->ip, sock->type == SILC_SOCKET_TYPE_SERVER ?
948 "server" : "router"));
950 /* Add the server into server cache. The server name and Server ID
951 is updated after we have received NEW_SERVER packet from the
954 silc_idlist_add_server(server->local_list, NULL,
955 sock->type == SILC_SOCKET_TYPE_SERVER ?
956 SILC_SERVER : SILC_ROUTER, NULL, NULL,
957 conn_data->send_key, conn_data->receive_key,
958 conn_data->pkcs, conn_data->hmac, NULL, sock);
960 SILC_LOG_ERROR(("Could not add new server to cache"));
961 silc_free(conn_data);
965 new_server->registered = TRUE;
966 new_server->hmac_key = conn_data->hmac_key;
967 new_server->hmac_key_len = conn_data->hmac_key_len;
969 /* Free the temporary connection data context from protocols */
970 silc_free(conn_data);
972 /* Add to sockets internal pointer for fast referencing */
973 sock->user_data = (void *)new_server;
975 /* There is connection to other server now, if it is router then
976 we will have connection to outside world. If we are router but
977 normal server connected to us then we will remain standalone,
978 if we are standlone. */
979 if (server->standalone && sock->type == SILC_SOCKET_TYPE_ROUTER) {
980 SILC_LOG_DEBUG(("We are not standalone server anymore"));
981 server->standalone = FALSE;
989 /* Connection has been fully established now. Everything is ok. */
990 SILC_LOG_DEBUG(("New connection authenticated"));
992 silc_protocol_free(protocol);
994 silc_buffer_free(ctx->packet);
996 silc_ske_free(ctx->ske);
998 silc_free(ctx->dest_id);
1000 sock->protocol = NULL;
1003 /* Internal routine that sends packet or marks packet to be sent. This
1004 is used directly only in special cases. Normal cases should use
1005 silc_server_packet_send. Returns < 0 error. */
1007 static int silc_server_packet_send_real(SilcServer server,
1008 SilcSocketConnection sock,
1013 /* Send the packet */
1014 ret = silc_packet_send(sock, force_send);
1018 /* Mark that there is some outgoing data available for this connection.
1019 This call sets the connection both for input and output (the input
1020 is set always and this call keeps the input setting, actually).
1021 Actual data sending is performed by silc_server_packet_process. */
1022 SILC_SET_CONNECTION_FOR_OUTPUT(sock->sock);
1024 /* Mark to socket that data is pending in outgoing buffer. This flag
1025 is needed if new data is added to the buffer before the earlier
1026 put data is sent to the network. */
1027 SILC_SET_OUTBUF_PENDING(sock);
1033 SilcPacketContext *packetdata;
1035 SilcSocketConnection sock;
1038 } SilcServerInternalPacket;
1040 /* This function is used to read packets from network and send packets to
1041 network. This is usually a generic task. */
1043 SILC_TASK_CALLBACK(silc_server_packet_process)
1045 SilcServer server = (SilcServer)context;
1046 SilcSocketConnection sock = server->sockets[fd];
1047 SilcCipher cipher = NULL;
1048 SilcHmac hmac = NULL;
1051 SILC_LOG_DEBUG(("Processing packet"));
1053 /* Packet sending */
1054 if (type == SILC_TASK_WRITE) {
1055 SILC_LOG_DEBUG(("Writing data to connection"));
1057 if (sock->outbuf->data - sock->outbuf->head)
1058 silc_buffer_push(sock->outbuf,
1059 sock->outbuf->data - sock->outbuf->head);
1061 ret = silc_server_packet_send_real(server, sock, TRUE);
1063 /* If returned -2 could not write to connection now, will do
1068 /* The packet has been sent and now it is time to set the connection
1069 back to only for input. When there is again some outgoing data
1070 available for this connection it will be set for output as well.
1071 This call clears the output setting and sets it only for input. */
1072 SILC_SET_CONNECTION_FOR_INPUT(fd);
1073 SILC_UNSET_OUTBUF_PENDING(sock);
1075 silc_buffer_clear(sock->outbuf);
1079 /* Packet receiving */
1080 if (type == SILC_TASK_READ) {
1081 SILC_LOG_DEBUG(("Reading data from connection"));
1083 /* Read some data from connection */
1084 ret = silc_packet_receive(sock);
1090 SILC_LOG_DEBUG(("Read EOF"));
1092 /* If connection is disconnecting already we will finally
1093 close the connection */
1094 if (SILC_IS_DISCONNECTING(sock)) {
1095 if (sock->user_data)
1096 silc_server_free_sock_user_data(server, sock);
1097 silc_server_close_connection(server, sock);
1101 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
1103 if (sock->user_data)
1104 silc_server_free_sock_user_data(server, sock);
1105 silc_server_close_connection(server, sock);
1109 /* If connection is disconnecting or disconnected we will ignore
1111 if (SILC_IS_DISCONNECTING(sock) || SILC_IS_DISCONNECTED(sock)) {
1112 SILC_LOG_DEBUG(("Ignoring read data from invalid connection"));
1116 switch (sock->type) {
1117 case SILC_SOCKET_TYPE_CLIENT:
1119 SilcClientEntry clnt = (SilcClientEntry)sock->user_data;
1123 clnt->last_receive = time(NULL);
1125 cipher = clnt->receive_key;
1129 case SILC_SOCKET_TYPE_SERVER:
1130 case SILC_SOCKET_TYPE_ROUTER:
1132 SilcServerEntry srvr = (SilcServerEntry)sock->user_data;
1136 srvr->last_receive = time(NULL);
1138 cipher = srvr->receive_key;
1142 case SILC_SOCKET_TYPE_UNKNOWN:
1144 SilcUnknownEntry conn_data = (SilcUnknownEntry)sock->user_data;
1148 cipher = conn_data->receive_key;
1149 hmac = conn_data->hmac;
1156 /* Process the packet. This will call the parser that will then
1157 decrypt and parse the packet. */
1158 silc_packet_receive_process(sock, cipher, hmac,
1159 silc_server_packet_parse, server);
1163 /* Parses whole packet, received earlier. */
1165 SILC_TASK_CALLBACK(silc_server_packet_parse_real)
1167 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
1168 SilcServer server = (SilcServer)parse_ctx->context;
1169 SilcSocketConnection sock = parse_ctx->sock;
1170 SilcPacketContext *packet = parse_ctx->packet;
1171 SilcBuffer buffer = packet->buffer;
1174 SILC_LOG_DEBUG(("Start"));
1176 /* Decrypt the received packet */
1177 ret = silc_packet_decrypt(parse_ctx->cipher, parse_ctx->hmac,
1183 /* Parse the packet. Packet type is returned. */
1184 ret = silc_packet_parse(packet);
1186 /* Parse the packet header in special way as this is "special"
1188 ret = silc_packet_parse_special(packet);
1191 if (ret == SILC_PACKET_NONE)
1194 /* Parse the incoming packet type */
1195 silc_server_packet_parse_type(server, sock, packet);
1198 silc_buffer_clear(sock->inbuf);
1200 silc_free(packet->src_id);
1202 silc_free(packet->dst_id);
1204 silc_free(parse_ctx);
1207 /* Parser callback called by silc_packet_receive_process. This merely
1208 registers timeout that will handle the actual parsing whem appropriate. */
1210 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1212 SilcServer server = (SilcServer)parser_context->context;
1213 SilcSocketConnection sock = parser_context->sock;
1215 switch (sock->type) {
1216 case SILC_SOCKET_TYPE_CLIENT:
1217 case SILC_SOCKET_TYPE_UNKNOWN:
1218 /* Parse the packet with timeout */
1219 silc_task_register(server->timeout_queue, sock->sock,
1220 silc_server_packet_parse_real,
1221 (void *)parser_context, 0, 100000,
1223 SILC_TASK_PRI_NORMAL);
1225 case SILC_SOCKET_TYPE_SERVER:
1226 case SILC_SOCKET_TYPE_ROUTER:
1227 /* Packets from servers are parsed as soon as possible */
1228 silc_task_register(server->timeout_queue, sock->sock,
1229 silc_server_packet_parse_real,
1230 (void *)parser_context, 0, 1,
1232 SILC_TASK_PRI_NORMAL);
1239 /* Parses the packet type and calls what ever routines the packet type
1240 requires. This is done for all incoming packets. */
1242 void silc_server_packet_parse_type(SilcServer server,
1243 SilcSocketConnection sock,
1244 SilcPacketContext *packet)
1246 SilcBuffer buffer = packet->buffer;
1247 SilcPacketType type = packet->type;
1249 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1251 /* Parse the packet type */
1253 case SILC_PACKET_DISCONNECT:
1254 SILC_LOG_DEBUG(("Disconnect packet"));
1256 case SILC_PACKET_SUCCESS:
1258 * Success received for something. For now we can have only
1259 * one protocol for connection executing at once hence this
1260 * success message is for whatever protocol is executing currently.
1262 SILC_LOG_DEBUG(("Success packet"));
1263 if (sock->protocol) {
1264 sock->protocol->execute(server->timeout_queue, 0,
1265 sock->protocol, sock->sock, 0, 0);
1268 case SILC_PACKET_FAILURE:
1270 * Failure received for something. For now we can have only
1271 * one protocol for connection executing at once hence this
1272 * failure message is for whatever protocol is executing currently.
1274 SILC_LOG_DEBUG(("Failure packet"));
1275 if (sock->protocol) {
1276 /* XXX Audit the failure type */
1277 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1278 sock->protocol->execute(server->timeout_queue, 0,
1279 sock->protocol, sock->sock, 0, 0);
1282 case SILC_PACKET_REJECT:
1283 SILC_LOG_DEBUG(("Reject packet"));
1290 case SILC_PACKET_CHANNEL_MESSAGE:
1292 * Received channel message. Channel messages are special packets
1293 * (although probably most common ones) hence they are handled
1296 SILC_LOG_DEBUG(("Channel Message packet"));
1297 silc_server_channel_message(server, sock, packet);
1300 case SILC_PACKET_CHANNEL_KEY:
1302 * Received key for channel. As channels are created by the router
1303 * the keys are as well. We will distribute the key to all of our
1304 * locally connected clients on the particular channel. Router
1305 * never receives this channel and thus is ignored.
1307 SILC_LOG_DEBUG(("Channel Key packet"));
1308 silc_server_channel_key(server, sock, packet);
1314 case SILC_PACKET_COMMAND:
1316 * Recived command. Allocate command context and execute the command.
1318 SILC_LOG_DEBUG(("Command packet"));
1319 silc_server_command_process(server, sock, packet);
1322 case SILC_PACKET_COMMAND_REPLY:
1324 * Received command reply packet. Servers never send commands thus
1325 * they don't receive command reply packets either, except in cases
1326 * where server has forwarded command packet coming from client.
1327 * This must be the case here or we will ignore the packet.
1329 SILC_LOG_DEBUG(("Command Reply packet"));
1330 silc_server_packet_relay_command_reply(server, sock, packet);
1334 * Private Message packets
1336 case SILC_PACKET_PRIVATE_MESSAGE:
1338 * Received private message packet. The packet is coming from either
1341 SILC_LOG_DEBUG(("Private Message packet"));
1342 silc_server_private_message(server, sock, packet);
1345 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1349 * Key Exchange protocol packets
1351 case SILC_PACKET_KEY_EXCHANGE:
1352 SILC_LOG_DEBUG(("KE packet"));
1353 if (sock->protocol && sock->protocol->protocol->type
1354 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1356 SilcServerKEInternalContext *proto_ctx =
1357 (SilcServerKEInternalContext *)sock->protocol->context;
1359 proto_ctx->packet = buffer;
1361 /* Let the protocol handle the packet */
1362 sock->protocol->execute(server->timeout_queue, 0,
1363 sock->protocol, sock->sock, 0, 100000);
1365 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1366 "protocol active, packet dropped."));
1368 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1372 case SILC_PACKET_KEY_EXCHANGE_1:
1373 SILC_LOG_DEBUG(("KE 1 packet"));
1374 if (sock->protocol && sock->protocol->protocol->type
1375 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1377 SilcServerKEInternalContext *proto_ctx =
1378 (SilcServerKEInternalContext *)sock->protocol->context;
1380 if (proto_ctx->packet)
1381 silc_buffer_free(proto_ctx->packet);
1383 proto_ctx->packet = buffer;
1384 proto_ctx->dest_id_type = packet->src_id_type;
1385 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_type);
1387 /* Let the protocol handle the packet */
1388 sock->protocol->execute(server->timeout_queue, 0,
1389 sock->protocol, sock->sock,
1392 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1393 "protocol active, packet dropped."));
1397 case SILC_PACKET_KEY_EXCHANGE_2:
1398 SILC_LOG_DEBUG(("KE 2 packet"));
1399 if (sock->protocol && sock->protocol->protocol->type
1400 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1402 SilcServerKEInternalContext *proto_ctx =
1403 (SilcServerKEInternalContext *)sock->protocol->context;
1405 if (proto_ctx->packet)
1406 silc_buffer_free(proto_ctx->packet);
1408 proto_ctx->packet = buffer;
1409 proto_ctx->dest_id_type = packet->src_id_type;
1410 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_type);
1412 /* Let the protocol handle the packet */
1413 sock->protocol->execute(server->timeout_queue, 0,
1414 sock->protocol, sock->sock,
1417 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1418 "protocol active, packet dropped."));
1422 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1423 /* If we receive this packet we will send to the other end information
1424 about our mandatory authentication method for the connection.
1425 This packet maybe received at any time. */
1428 * Connection Authentication protocol packets
1430 case SILC_PACKET_CONNECTION_AUTH:
1431 /* Start of the authentication protocol. We receive here the
1432 authentication data and will verify it. */
1433 SILC_LOG_DEBUG(("Connection auth packet"));
1434 if (sock->protocol && sock->protocol->protocol->type
1435 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1437 SilcServerConnAuthInternalContext *proto_ctx =
1438 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1440 proto_ctx->packet = buffer;
1442 /* Let the protocol handle the packet */
1443 sock->protocol->execute(server->timeout_queue, 0,
1444 sock->protocol, sock->sock, 0, 0);
1446 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1447 "protocol active, packet dropped."));
1451 case SILC_PACKET_NEW_ID:
1453 * Received New ID packet. This includes some new ID that has been
1454 * created. It may be for client, server or channel. This is the way
1455 * to distribute information about new registered entities in the
1458 SILC_LOG_DEBUG(("New ID packet"));
1459 silc_server_new_id(server, sock, packet);
1462 case SILC_PACKET_NEW_CLIENT:
1464 * Received new client packet. This includes client information that
1465 * we will use to create initial client ID. After creating new
1466 * ID we will send it to the client.
1468 SILC_LOG_DEBUG(("New Client packet"));
1469 silc_server_new_client(server, sock, packet);
1472 case SILC_PACKET_NEW_SERVER:
1474 * Received new server packet. This includes Server ID and some other
1475 * information that we may save. This is received after server has
1478 SILC_LOG_DEBUG(("New Server packet"));
1479 silc_server_new_server(server, sock, packet);
1482 case SILC_PACKET_NEW_CHANNEL:
1485 case SILC_PACKET_NEW_CHANNEL_USER:
1488 case SILC_PACKET_NEW_CHANNEL_LIST:
1491 case SILC_PACKET_NEW_CHANNEL_USER_LIST:
1494 case SILC_PACKET_REPLACE_ID:
1496 * Received replace ID packet. This sends the old ID that is to be
1497 * replaced with the new one included into the packet. Client must not
1500 SILC_LOG_DEBUG(("Replace ID packet"));
1501 silc_server_replace_id(server, sock, packet);
1504 case SILC_PACKET_REMOVE_ID:
1507 case SILC_PACKET_REMOVE_CHANNEL_USER:
1509 * Received packet to remove user from a channel. Routers notify other
1510 * routers about a user leaving a channel.
1512 SILC_LOG_DEBUG(("Remove Channel User packet"));
1513 silc_server_remove_channel_user(server, sock, packet);
1517 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1523 /* Assembles a new packet to be sent out to network. This doesn't actually
1524 send the packet but creates the packet and fills the outgoing data
1525 buffer and marks the packet ready to be sent to network. However, If
1526 argument force_send is TRUE the packet is sent immediately and not put
1527 to queue. Normal case is that the packet is not sent immediately. */
1529 void silc_server_packet_send(SilcServer server,
1530 SilcSocketConnection sock,
1531 SilcPacketType type,
1532 SilcPacketFlags flags,
1533 unsigned char *data,
1534 unsigned int data_len,
1537 void *dst_id = NULL;
1538 SilcIdType dst_id_type = SILC_ID_NONE;
1543 /* Get data used in the packet sending, keys and stuff */
1544 switch(sock->type) {
1545 case SILC_SOCKET_TYPE_CLIENT:
1546 if (((SilcClientEntry)sock->user_data)->id) {
1547 dst_id = ((SilcClientEntry)sock->user_data)->id;
1548 dst_id_type = SILC_ID_CLIENT;
1551 case SILC_SOCKET_TYPE_SERVER:
1552 case SILC_SOCKET_TYPE_ROUTER:
1553 if (((SilcServerEntry)sock->user_data)->id) {
1554 dst_id = ((SilcServerEntry)sock->user_data)->id;
1555 dst_id_type = SILC_ID_SERVER;
1562 silc_server_packet_send_dest(server, sock, type, flags, dst_id,
1563 dst_id_type, data, data_len, force_send);
1566 /* Assembles a new packet to be sent out to network. This doesn't actually
1567 send the packet but creates the packet and fills the outgoing data
1568 buffer and marks the packet ready to be sent to network. However, If
1569 argument force_send is TRUE the packet is sent immediately and not put
1570 to queue. Normal case is that the packet is not sent immediately.
1571 Destination information is sent as argument for this function. */
1573 void silc_server_packet_send_dest(SilcServer server,
1574 SilcSocketConnection sock,
1575 SilcPacketType type,
1576 SilcPacketFlags flags,
1578 SilcIdType dst_id_type,
1579 unsigned char *data,
1580 unsigned int data_len,
1583 SilcPacketContext packetdata;
1584 SilcCipher cipher = NULL;
1585 SilcHmac hmac = NULL;
1586 unsigned char *dst_id_data = NULL;
1587 unsigned int dst_id_len = 0;
1589 SILC_LOG_DEBUG(("Sending packet, type %d", type));
1591 /* Get data used in the packet sending, keys and stuff */
1592 switch(sock->type) {
1593 case SILC_SOCKET_TYPE_CLIENT:
1594 if (sock->user_data) {
1595 cipher = ((SilcClientEntry)sock->user_data)->send_key;
1596 hmac = ((SilcClientEntry)sock->user_data)->hmac;
1599 case SILC_SOCKET_TYPE_SERVER:
1600 case SILC_SOCKET_TYPE_ROUTER:
1601 if (sock->user_data) {
1602 cipher = ((SilcServerEntry)sock->user_data)->send_key;
1603 hmac = ((SilcServerEntry)sock->user_data)->hmac;
1607 if (sock->user_data) {
1608 /* We don't know what type of connection this is thus it must
1609 be in authentication phase. */
1610 cipher = ((SilcUnknownEntry)sock->user_data)->send_key;
1611 hmac = ((SilcUnknownEntry)sock->user_data)->hmac;
1617 dst_id_data = silc_id_id2str(dst_id, dst_id_type);
1618 dst_id_len = silc_id_get_len(dst_id_type);
1621 /* Set the packet context pointers */
1622 packetdata.type = type;
1623 packetdata.flags = flags;
1624 packetdata.src_id = silc_id_id2str(server->id, server->id_type);
1625 packetdata.src_id_len = SILC_ID_SERVER_LEN;
1626 packetdata.src_id_type = server->id_type;
1627 packetdata.dst_id = dst_id_data;
1628 packetdata.dst_id_len = dst_id_len;
1629 packetdata.dst_id_type = dst_id_type;
1630 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1631 packetdata.src_id_len + dst_id_len;
1632 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1633 packetdata.rng = server->rng;
1635 /* Prepare outgoing data buffer for packet sending */
1636 silc_packet_send_prepare(sock,
1637 SILC_PACKET_HEADER_LEN +
1638 packetdata.src_id_len +
1639 packetdata.dst_id_len,
1643 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
1645 packetdata.buffer = sock->outbuf;
1647 /* Put the data to the buffer */
1648 if (data && data_len)
1649 silc_buffer_put(sock->outbuf, data, data_len);
1651 /* Create the outgoing packet */
1652 silc_packet_assemble(&packetdata);
1654 /* Encrypt the packet */
1656 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1658 SILC_LOG_HEXDUMP(("Outgoing packet, len %d", sock->outbuf->len),
1659 sock->outbuf->data, sock->outbuf->len);
1661 /* Now actually send the packet */
1662 silc_server_packet_send_real(server, sock, force_send);
1664 if (packetdata.src_id)
1665 silc_free(packetdata.src_id);
1666 if (packetdata.dst_id)
1667 silc_free(packetdata.dst_id);
1670 /* Forwards packet. Packets sent with this function will be marked as
1671 forwarded (in the SILC header flags) so that the receiver knows that
1672 we have forwarded the packet to it. Forwarded packets are handled
1673 specially by the receiver as they are not destined to the receiver
1674 originally. However, the receiver knows this because the forwarded
1675 flag has been set (and the flag is authenticated). */
1677 void silc_server_packet_forward(SilcServer server,
1678 SilcSocketConnection sock,
1679 unsigned char *data, unsigned int data_len,
1682 SilcCipher cipher = NULL;
1683 SilcHmac hmac = NULL;
1685 SILC_LOG_DEBUG(("Forwarding packet"));
1687 /* Get data used in the packet sending, keys and stuff */
1688 switch(sock->type) {
1689 case SILC_SOCKET_TYPE_CLIENT:
1690 if (sock->user_data) {
1691 cipher = ((SilcClientEntry )sock->user_data)->send_key;
1692 hmac = ((SilcClientEntry )sock->user_data)->hmac;
1695 case SILC_SOCKET_TYPE_SERVER:
1696 case SILC_SOCKET_TYPE_ROUTER:
1697 if (sock->user_data) {
1698 cipher = ((SilcServerEntry )sock->user_data)->send_key;
1699 hmac = ((SilcServerEntry )sock->user_data)->hmac;
1703 /* We won't forward to unknown destination - keys must exist with
1704 the destination before forwarding. */
1708 /* Prepare outgoing data buffer for packet sending */
1709 silc_packet_send_prepare(sock, 0, 0, data_len);
1711 /* Mungle the packet flags and add the FORWARDED flag */
1713 data[2] |= (unsigned char)SILC_PACKET_FLAG_FORWARDED;
1715 /* Put the data to the buffer */
1716 if (data && data_len)
1717 silc_buffer_put(sock->outbuf, data, data_len);
1719 /* Encrypt the packet */
1721 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1723 SILC_LOG_HEXDUMP(("Forwarded packet, len %d", sock->outbuf->len),
1724 sock->outbuf->data, sock->outbuf->len);
1726 /* Now actually send the packet */
1727 silc_server_packet_send_real(server, sock, force_send);
1730 /* Internal routine to actually create the channel packet and send it
1731 to network. This is common function in channel message sending. If
1732 `channel_message' is TRUE this encrypts the message as it is strictly
1733 a channel message. If FALSE normal encryption process is used. */
1736 silc_server_packet_send_to_channel_real(SilcServer server,
1737 SilcSocketConnection sock,
1738 SilcPacketContext *packet,
1741 unsigned char *data,
1742 unsigned int data_len,
1743 int channel_message,
1746 packet->truelen = data_len + SILC_PACKET_HEADER_LEN +
1747 packet->src_id_len + packet->dst_id_len;
1749 /* Prepare outgoing data buffer for packet sending */
1750 silc_packet_send_prepare(sock,
1751 SILC_PACKET_HEADER_LEN +
1752 packet->src_id_len +
1757 packet->buffer = sock->outbuf;
1759 /* Put the data to buffer, assemble and encrypt the packet. The packet
1760 is encrypted with normal session key shared with the client. */
1761 silc_buffer_put(sock->outbuf, data, data_len);
1762 silc_packet_assemble(packet);
1763 if (channel_message)
1764 silc_packet_encrypt(cipher, hmac, sock->outbuf, SILC_PACKET_HEADER_LEN +
1765 packet->src_id_len + packet->dst_id_len +
1768 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1770 SILC_LOG_HEXDUMP(("Channel packet, len %d", sock->outbuf->len),
1771 sock->outbuf->data, sock->outbuf->len);
1773 /* Now actually send the packet */
1774 silc_server_packet_send_real(server, sock, force_send);
1777 /* This routine is used by the server to send packets to channel. The
1778 packet sent with this function is distributed to all clients on
1779 the channel. Usually this is used to send notify messages to the
1780 channel, things like notify about new user joining to the channel. */
1782 void silc_server_packet_send_to_channel(SilcServer server,
1783 SilcChannelEntry channel,
1784 SilcPacketType type,
1785 unsigned char *data,
1786 unsigned int data_len,
1790 SilcSocketConnection sock = NULL;
1791 SilcPacketContext packetdata;
1792 SilcClientEntry client = NULL;
1793 SilcServerEntry *routed = NULL;
1794 SilcChannelClientEntry chl;
1795 unsigned int routed_count = 0;
1799 /* This doesn't send channel message packets */
1800 if (type == SILC_PACKET_CHANNEL_MESSAGE)
1803 SILC_LOG_DEBUG(("Sending packet to channel"));
1805 /* Set the packet context pointers. */
1806 packetdata.flags = 0;
1807 packetdata.type = type;
1808 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
1809 packetdata.src_id_len = SILC_ID_SERVER_LEN;
1810 packetdata.src_id_type = SILC_ID_SERVER;
1811 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1812 packetdata.dst_id_len = SILC_ID_CHANNEL_LEN;
1813 packetdata.dst_id_type = SILC_ID_CHANNEL;
1814 packetdata.rng = server->rng;
1815 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1816 packetdata.src_id_len + packetdata.dst_id_len;
1817 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1819 /* If there are global users in the channel we will send the message
1820 first to our router for further routing. */
1821 if (server->server_type == SILC_SERVER && !server->standalone &&
1822 channel->global_users) {
1823 SilcServerEntry router;
1825 /* Get data used in packet header encryption, keys and stuff. */
1826 router = server->id_entry->router;
1827 sock = (SilcSocketConnection)router->connection;
1828 cipher = router->send_key;
1829 hmac = router->hmac;
1831 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
1833 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1835 data_len, FALSE, force_send);
1838 /* Send the message to clients on the channel's client list. */
1839 silc_list_start(channel->user_list);
1840 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1841 client = chl->client;
1843 /* If client has router set it is not locally connected client and
1844 we will route the message to the router set in the client. */
1845 if (client && client->router && server->server_type == SILC_ROUTER) {
1848 /* Check if we have sent the packet to this route already */
1849 for (k = 0; k < routed_count; k++)
1850 if (routed[k] == client->router)
1852 if (k < routed_count)
1855 /* Get data used in packet header encryption, keys and stuff. */
1856 sock = (SilcSocketConnection)client->router->connection;
1857 cipher = client->router->send_key;
1858 hmac = client->router->hmac;
1860 /* Send the packet */
1861 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1863 data_len, FALSE, force_send);
1865 /* We want to make sure that the packet is routed to same router
1866 only once. Mark this route as sent route. */
1868 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
1869 routed[k] = client->router;
1875 /* Send to locally connected client */
1878 /* XXX Check client's mode on the channel. */
1880 /* Get data used in packet header encryption, keys and stuff. */
1881 sock = (SilcSocketConnection)client->connection;
1882 cipher = client->send_key;
1883 hmac = client->hmac;
1885 /* Send the packet */
1886 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1888 data_len, FALSE, force_send);
1894 silc_free(packetdata.src_id);
1895 silc_free(packetdata.dst_id);
1898 /* This routine is explicitly used to relay messages to some channel.
1899 Packets sent with this function we have received earlier and are
1900 totally encrypted. This just sends the packet to all clients on
1901 the channel. If the sender of the packet is someone on the channel
1902 the message will not be sent to that client. The SILC Packet header
1903 is encrypted with the session key shared between us and the client.
1904 MAC is also computed before encrypting the header. Rest of the
1905 packet will be untouched. */
1907 void silc_server_packet_relay_to_channel(SilcServer server,
1908 SilcSocketConnection sender_sock,
1909 SilcChannelEntry channel,
1911 SilcIdType sender_type,
1912 unsigned char *data,
1913 unsigned int data_len,
1916 int i, found = FALSE;
1917 SilcSocketConnection sock = NULL;
1918 SilcPacketContext packetdata;
1919 SilcClientEntry client = NULL;
1920 SilcServerEntry *routed = NULL;
1921 SilcChannelClientEntry chl;
1922 unsigned int routed_count = 0;
1926 SILC_LOG_DEBUG(("Relaying packet to channel"));
1928 /* Set the packet context pointers. */
1929 packetdata.flags = 0;
1930 packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
1931 packetdata.src_id = silc_id_id2str(sender, sender_type);
1932 packetdata.src_id_len = silc_id_get_len(sender_type);
1933 packetdata.src_id_type = sender_type;
1934 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1935 packetdata.dst_id_len = SILC_ID_CHANNEL_LEN;
1936 packetdata.dst_id_type = SILC_ID_CHANNEL;
1937 packetdata.rng = server->rng;
1938 packetdata.padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
1939 packetdata.src_id_len +
1940 packetdata.dst_id_len));
1942 /* If there are global users in the channel we will send the message
1943 first to our router for further routing. */
1944 if (server->server_type == SILC_SERVER && !server->standalone &&
1945 channel->global_users) {
1946 SilcServerEntry router;
1948 router = server->id_entry->router;
1950 /* Check that the sender is not our router. */
1951 if (sender_sock != (SilcSocketConnection)router->connection) {
1953 /* Get data used in packet header encryption, keys and stuff. */
1954 sock = (SilcSocketConnection)router->connection;
1955 cipher = router->send_key;
1956 hmac = router->hmac;
1958 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
1960 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1962 data_len, TRUE, force_send);
1966 /* Send the message to clients on the channel's client list. */
1967 silc_list_start(channel->user_list);
1968 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
1969 client = chl->client;
1973 /* If sender is one on the channel do not send it the packet. */
1974 if (!found && !SILC_ID_CLIENT_COMPARE(client->id, sender)) {
1979 /* If the client has set router it means that it is not locally
1980 connected client and we will route the packet further. */
1981 if (server->server_type == SILC_ROUTER && client->router) {
1984 /* Sender maybe server as well so we want to make sure that
1985 we won't send the message to the server it came from. */
1986 if (!found && !SILC_ID_SERVER_COMPARE(client->router->id, sender)) {
1991 /* Check if we have sent the packet to this route already */
1992 for (k = 0; k < routed_count; k++)
1993 if (routed[k] == client->router)
1995 if (k < routed_count)
1998 /* Get data used in packet header encryption, keys and stuff. */
1999 sock = (SilcSocketConnection)client->router->connection;
2000 cipher = client->router->send_key;
2001 hmac = client->router->hmac;
2003 /* Send the packet */
2004 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
2006 data_len, TRUE, force_send);
2008 /* We want to make sure that the packet is routed to same router
2009 only once. Mark this route as sent route. */
2011 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
2012 routed[k] = client->router;
2018 /* XXX Check client's mode on the channel. */
2020 /* Get data used in packet header encryption, keys and stuff. */
2021 sock = (SilcSocketConnection)client->connection;
2022 cipher = client->send_key;
2023 hmac = client->hmac;
2025 SILC_LOG_DEBUG(("Sending packet to client %s",
2026 sock->hostname ? sock->hostname : sock->ip));
2028 /* Send the packet */
2029 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
2031 data_len, TRUE, force_send);
2035 silc_free(packetdata.src_id);
2036 silc_free(packetdata.dst_id);
2039 /* This function is used to send packets strictly to all local clients
2040 on a particular channel. This is used for example to distribute new
2041 channel key to all our locally connected clients on the channel.
2042 The packets are always encrypted with the session key shared between
2043 the client, this means these are not _to the channel_ but _to the client_
2046 void silc_server_packet_send_local_channel(SilcServer server,
2047 SilcChannelEntry channel,
2048 SilcPacketType type,
2049 SilcPacketFlags flags,
2050 unsigned char *data,
2051 unsigned int data_len,
2055 SilcClientEntry client;
2056 SilcChannelClientEntry chl;
2057 SilcSocketConnection sock = NULL;
2059 SILC_LOG_DEBUG(("Start"));
2061 /* Send the message to clients on the channel's client list. */
2062 silc_list_start(channel->user_list);
2063 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2064 client = chl->client;
2067 sock = (SilcSocketConnection)client->connection;
2069 /* Send the packet to the client */
2070 silc_server_packet_send_dest(server, sock, type, flags, client->id,
2071 SILC_ID_CLIENT, data, data_len,
2077 /* Relays received command reply packet to the correct destination. The
2078 destination must be one of our locally connected client or the packet
2079 will be ignored. This is called when server has forwarded one of
2080 client's command request to router and router has now replied to the
2083 void silc_server_packet_relay_command_reply(SilcServer server,
2084 SilcSocketConnection sock,
2085 SilcPacketContext *packet)
2087 SilcBuffer buffer = packet->buffer;
2088 SilcClientEntry client;
2090 SilcSocketConnection dst_sock;
2092 SILC_LOG_DEBUG(("Start"));
2094 /* Source must be server or router */
2095 if (packet->src_id_type != SILC_ID_SERVER &&
2096 sock->type != SILC_SOCKET_TYPE_ROUTER)
2099 /* Destination must be client */
2100 if (packet->dst_id_type != SILC_ID_CLIENT)
2103 /* Execute command reply locally for the command */
2104 silc_server_command_reply_process(server, sock, buffer);
2106 id = silc_id_str2id(packet->dst_id, SILC_ID_CLIENT);
2108 /* Destination must be one of ours */
2109 client = silc_idlist_find_client_by_id(server->local_list, id);
2115 /* Relay the packet to the client */
2117 dst_sock = (SilcSocketConnection)client->connection;
2118 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
2119 + packet->dst_id_len + packet->padlen);
2121 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
2122 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
2124 /* Encrypt packet */
2125 if (client && client->send_key)
2126 silc_packet_encrypt(client->send_key, client->hmac,
2127 dst_sock->outbuf, buffer->len);
2129 /* Send the packet */
2130 silc_server_packet_send_real(server, dst_sock, FALSE);
2135 silc_buffer_free(buffer);
2138 /* Closes connection to socket connection */
2140 void silc_server_close_connection(SilcServer server,
2141 SilcSocketConnection sock)
2144 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
2146 /* We won't listen for this connection anymore */
2147 silc_schedule_unset_listen_fd(sock->sock);
2149 /* Unregister all tasks */
2150 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2151 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2153 /* Close the actual connection */
2154 silc_net_close_connection(sock->sock);
2155 server->sockets[sock->sock] = NULL;
2156 silc_socket_free(sock);
2159 /* Sends disconnect message to remote connection and disconnects the
2162 void silc_server_disconnect_remote(SilcServer server,
2163 SilcSocketConnection sock,
2164 const char *fmt, ...)
2167 unsigned char buf[4096];
2169 memset(buf, 0, sizeof(buf));
2171 vsprintf(buf, fmt, ap);
2174 SILC_LOG_DEBUG(("Disconnecting remote host"));
2176 /* Notify remote end that the conversation is over. The notify message
2177 is tried to be sent immediately. */
2178 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2179 buf, strlen(buf), TRUE);
2181 /* Mark the connection to be disconnected */
2182 SILC_SET_DISCONNECTED(sock);
2183 silc_server_close_connection(server, sock);
2186 /* Free's user_data pointer from socket connection object. As this
2187 pointer maybe anything we wil switch here to find the correct
2188 data type and free it the way it needs to be free'd. */
2190 void silc_server_free_sock_user_data(SilcServer server,
2191 SilcSocketConnection sock)
2193 SILC_LOG_DEBUG(("Start"));
2195 switch(sock->type) {
2196 case SILC_SOCKET_TYPE_CLIENT:
2198 SilcClientEntry user_data = (SilcClientEntry )sock->user_data;
2200 /* Remove client from all channels */
2201 silc_server_remove_from_channels(server, sock, user_data);
2203 /* Free the client entry and everything in it */
2204 /* XXX must take some info to history before freeing */
2205 silc_idlist_del_client(server->local_list, user_data);
2208 case SILC_SOCKET_TYPE_SERVER:
2209 case SILC_SOCKET_TYPE_ROUTER:
2217 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2219 if (user_data->send_key)
2220 silc_cipher_free(user_data->send_key);
2221 if (user_data->receive_key)
2222 silc_cipher_free(user_data->receive_key);
2223 if (user_data->pkcs)
2224 silc_pkcs_free(user_data->pkcs);
2225 if (user_data->hmac) {
2226 silc_hmac_free(user_data->hmac);
2227 memset(user_data->hmac_key, 0, user_data->hmac_key_len);
2228 silc_free(user_data->hmac_key);
2230 silc_free(user_data);
2235 sock->user_data = NULL;
2240 /* Removes client from all channels it has joined. This is used when
2241 client connection is disconnected. If the client on a channel
2242 is last, the channel is removed as well. */
2244 void silc_server_remove_from_channels(SilcServer server,
2245 SilcSocketConnection sock,
2246 SilcClientEntry client)
2249 SilcChannelEntry channel;
2250 SilcChannelClientEntry chl;
2251 SilcBuffer chidp, clidp;
2253 SILC_LOG_DEBUG(("Start"));
2255 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2257 /* Remove the client from all channels. The client is removed from
2258 the channels' user list. */
2259 for (i = 0; i < client->channel_count; i++) {
2260 channel = client->channel[i];
2264 chidp = silc_id_payload_encode(channel->id, SILC_ID_CHANNEL);
2266 /* Remove from channel */
2267 silc_list_start(channel->user_list);
2268 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2269 if (chl->client == client) {
2271 /* If this client is last one on the channel the channel
2272 is removed all together. */
2273 if (silc_list_count(channel->user_list) == 1) {
2275 /* However, if the channel has marked global users then the
2276 channel is not created locally, and this does not remove the
2277 channel globally from SILC network, in this case we will
2278 notify that this client has left the channel. */
2279 if (channel->global_users)
2280 silc_server_send_notify_to_channel(server, channel,
2281 SILC_NOTIFY_TYPE_SIGNOFF, 1,
2282 clidp->data, clidp->len);
2284 silc_idlist_del_channel(server->local_list, channel);
2288 silc_list_del(channel->user_list, chl);
2291 /* Send notify to channel about client leaving SILC and thus
2292 the entire channel. */
2293 silc_server_send_notify_to_channel(server, channel,
2294 SILC_NOTIFY_TYPE_SIGNOFF, 1,
2295 clidp->data, clidp->len);
2299 silc_buffer_free(chidp);
2302 if (client->channel_count)
2303 silc_free(client->channel);
2304 client->channel = NULL;
2305 silc_buffer_free(clidp);
2308 /* Removes client from one channel. This is used for example when client
2309 calls LEAVE command to remove itself from the channel. Returns TRUE
2310 if channel still exists and FALSE if the channel is removed when
2311 last client leaves the channel. If `notify' is FALSE notify messages
2314 int silc_server_remove_from_one_channel(SilcServer server,
2315 SilcSocketConnection sock,
2316 SilcChannelEntry channel,
2317 SilcClientEntry client,
2321 SilcChannelEntry ch;
2322 SilcChannelClientEntry chl;
2325 SILC_LOG_DEBUG(("Start"));
2327 clidp = silc_id_payload_encode(client->id, SILC_ID_CLIENT);
2329 /* Remove the client from the channel. The client is removed from
2330 the channel's user list. */
2331 for (i = 0; i < client->channel_count; i++) {
2332 ch = client->channel[i];
2333 if (!ch || ch != channel)
2336 client->channel[i] = NULL;
2338 /* Remove from channel */
2339 silc_list_start(channel->user_list);
2340 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2341 if (chl->client == client) {
2343 /* If this client is last one on the channel the channel
2344 is removed all together. */
2345 if (silc_list_count(channel->user_list) == 1) {
2346 /* Notify about leaving client if this channel has global users,
2347 ie. the channel is not created locally. */
2348 if (notify && channel->global_users)
2349 silc_server_send_notify_to_channel(server, channel,
2350 SILC_NOTIFY_TYPE_LEAVE, 1,
2351 clidp->data, clidp->len);
2353 silc_idlist_del_channel(server->local_list, channel);
2354 silc_buffer_free(clidp);
2358 silc_list_del(channel->user_list, chl);
2361 /* Send notify to channel about client leaving the channel */
2363 silc_server_send_notify_to_channel(server, channel,
2364 SILC_NOTIFY_TYPE_LEAVE, 1,
2365 clidp->data, clidp->len);
2370 silc_buffer_free(clidp);
2374 /* Returns TRUE if the given client is on the channel. FALSE if not.
2375 This works because we assure that the user list on the channel is
2376 always in up to date thus we can only check the channel list from
2377 `client' which is faster than checking the user list from `channel'. */
2379 int silc_server_client_on_channel(SilcClientEntry client,
2380 SilcChannelEntry channel)
2384 if (!client || !channel)
2387 for (i = 0; i < client->channel_count; i++) {
2388 if (client->channel[i] == channel)
2395 /* Timeout callback. This is called if connection is idle or for some
2396 other reason is not responding within some period of time. This
2397 disconnects the remote end. */
2399 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2401 SilcServer server = (SilcServer)context;
2402 SilcSocketConnection sock = server->sockets[fd];
2404 silc_server_disconnect_remote(server, sock,
2405 "Server closed connection: "
2406 "Connection timeout");
2409 /* Internal routine used to send (relay, route) private messages to some
2410 destination. If the private message key does not exist then the message
2411 is re-encrypted, otherwise we just pass it along. */
2414 silc_server_private_message_send_internal(SilcServer server,
2415 SilcSocketConnection dst_sock,
2418 SilcPacketContext *packet)
2420 SilcBuffer buffer = packet->buffer;
2422 /* Send and re-encrypt if private messge key does not exist */
2423 if ((packet->flags & SILC_PACKET_FLAG_PRIVMSG_KEY) == FALSE) {
2425 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
2426 + packet->dst_id_len + packet->padlen);
2427 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
2428 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
2430 /* Re-encrypt packet */
2431 silc_packet_encrypt(cipher, hmac, dst_sock->outbuf, buffer->len);
2433 /* Send the packet */
2434 silc_server_packet_send_real(server, dst_sock, FALSE);
2437 /* Key exist so just send it */
2438 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
2439 + packet->dst_id_len + packet->padlen);
2440 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
2441 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
2442 silc_server_packet_send_real(server, dst_sock, FALSE);
2446 /* Received private message. This resolves the destination of the message
2447 and sends the packet. This is used by both server and router. If the
2448 destination is our locally connected client this sends the packet to
2449 the client. This may also send the message for further routing if
2450 the destination is not in our server (or router). */
2452 void silc_server_private_message(SilcServer server,
2453 SilcSocketConnection sock,
2454 SilcPacketContext *packet)
2456 SilcBuffer buffer = packet->buffer;
2458 SilcServerEntry router;
2459 SilcSocketConnection dst_sock;
2460 SilcClientEntry client;
2462 SILC_LOG_DEBUG(("Start"));
2464 if (!packet->dst_id) {
2465 SILC_LOG_ERROR(("Bad Client ID in private message packet, dropped"));
2469 /* Decode destination Client ID */
2470 id = silc_id_str2id(packet->dst_id, SILC_ID_CLIENT);
2472 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
2476 /* If the destination belongs to our server we don't have to route
2477 the message anywhere but to send it to the local destination. */
2478 client = silc_idlist_find_client_by_id(server->local_list, id);
2480 /* It exists, now deliver the message to the destination */
2481 dst_sock = (SilcSocketConnection)client->connection;
2483 /* If we are router and the client has router then the client is in
2484 our cell but not directly connected to us. */
2485 if (server->server_type == SILC_ROUTER && client->router) {
2486 /* We are of course in this case the client's router thus the real
2487 "router" of the client is the server who owns the client. Thus
2488 we will send the packet to that server. */
2489 router = (SilcServerEntry)dst_sock->user_data;
2490 // assert(client->router == server->id_entry);
2492 silc_server_private_message_send_internal(server, dst_sock,
2499 /* Seems that client really is directly connected to us */
2500 silc_server_private_message_send_internal(server, dst_sock,
2502 client->hmac, packet);
2506 /* Destination belongs to someone not in this server. If we are normal
2507 server our action is to send the packet to our router. */
2508 if (server->server_type == SILC_SERVER && !server->standalone) {
2509 router = server->id_entry->router;
2511 /* Send to primary route */
2513 dst_sock = (SilcSocketConnection)router->connection;
2514 silc_server_private_message_send_internal(server, dst_sock,
2516 router->hmac, packet);
2521 /* We are router and we will perform route lookup for the destination
2522 and send the message to fastest route. */
2523 if (server->server_type == SILC_ROUTER && !server->standalone) {
2524 dst_sock = silc_server_get_route(server, id, SILC_ID_CLIENT);
2525 router = (SilcServerEntry)dst_sock->user_data;
2527 /* Get fastest route and send packet. */
2529 silc_server_private_message_send_internal(server, dst_sock,
2531 router->hmac, packet);
2537 silc_server_send_error(server, sock,
2538 "No such nickname: Private message not sent");
2540 silc_buffer_free(buffer);
2543 /* Process received channel message. The message can be originated from
2544 client or server. */
2546 void silc_server_channel_message(SilcServer server,
2547 SilcSocketConnection sock,
2548 SilcPacketContext *packet)
2550 SilcChannelEntry channel = NULL;
2551 SilcChannelClientEntry chl;
2552 SilcClientEntry client = NULL;
2553 SilcChannelID *id = NULL;
2554 void *sender = NULL;
2555 SilcBuffer buffer = packet->buffer;
2558 SILC_LOG_DEBUG(("Processing channel message"));
2561 if (packet->dst_id_type != SILC_ID_CHANNEL) {
2562 SILC_LOG_ERROR(("Received bad message for channel, dropped"));
2563 SILC_LOG_DEBUG(("Received bad message for channel, dropped"));
2567 /* Find channel entry */
2568 id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
2569 channel = silc_idlist_find_channel_by_id(server->local_list, id);
2571 SILC_LOG_DEBUG(("Could not find channel"));
2575 /* See that this client is on the channel. If the message is coming
2576 from router we won't do the check as the message is from client that
2577 we don't know about. Also, if the original sender is not client
2578 (as it can be server as well) we don't do the check. */
2579 sender = silc_id_str2id(packet->src_id, packet->src_id_type);
2580 if (sock->type != SILC_SOCKET_TYPE_ROUTER &&
2581 packet->src_id_type == SILC_ID_CLIENT) {
2582 silc_list_start(channel->user_list);
2583 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2584 if (chl->client && !SILC_ID_CLIENT_COMPARE(chl->client->id, sender))
2587 if (chl == SILC_LIST_END)
2591 /* Distribute the packet to our local clients. This will send the
2592 packet for further routing as well, if needed. */
2593 silc_server_packet_relay_to_channel(server, sock, channel, sender,
2594 packet->src_id_type,
2595 packet->buffer->data,
2596 packet->buffer->len, FALSE);
2603 silc_buffer_free(buffer);
2606 /* Received channel key packet. We distribute the key to all of our locally
2607 connected clients on the channel. */
2608 /* XXX Router must accept this packet and distribute the key to all its
2609 server that has clients on the channel */
2611 void silc_server_channel_key(SilcServer server,
2612 SilcSocketConnection sock,
2613 SilcPacketContext *packet)
2615 SilcBuffer buffer = packet->buffer;
2616 SilcChannelKeyPayload payload = NULL;
2617 SilcChannelID *id = NULL;
2618 SilcChannelEntry channel;
2619 SilcChannelClientEntry chl;
2620 SilcClientEntry client;
2622 unsigned int tmp_len;
2626 if (packet->src_id_type != SILC_ID_SERVER &&
2627 sock->type != SILC_SOCKET_TYPE_ROUTER)
2630 /* Decode channel key payload */
2631 payload = silc_channel_key_payload_parse(buffer);
2633 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2637 /* Get channel ID */
2638 tmp = silc_channel_key_get_id(payload, &tmp_len);
2639 id = silc_id_payload_parse_id(tmp, tmp_len);
2643 /* Get the channel entry */
2644 channel = silc_idlist_find_channel_by_id(server->local_list, id);
2646 SILC_LOG_ERROR(("Received key for non-existent channel"));
2650 /* Save the key for us as well */
2651 tmp = silc_channel_key_get_key(payload, &tmp_len);
2654 cipher = silc_channel_key_get_cipher(payload, NULL);;
2657 if (!silc_cipher_alloc(cipher, &channel->channel_key))
2660 channel->key_len = tmp_len * 8;
2661 channel->key = silc_calloc(tmp_len, sizeof(unsigned char));
2662 memcpy(channel->key, tmp, tmp_len);
2663 channel->channel_key->cipher->set_key(channel->channel_key->context,
2666 /* Distribute the key to all clients on the channel */
2667 /* XXX Some other sender should be used, I think this is not correct */
2668 silc_list_start(channel->user_list);
2669 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2670 client = chl->client;
2673 silc_server_packet_send_dest(server, client->connection,
2674 SILC_PACKET_CHANNEL_KEY, 0,
2675 client->id, SILC_ID_CLIENT,
2676 buffer->data, buffer->len, FALSE);
2683 silc_channel_key_payload_free(payload);
2684 silc_buffer_free(buffer);
2687 /* Sends current motd to client */
2689 void silc_server_send_motd(SilcServer server,
2690 SilcSocketConnection sock)
2695 if (server->config && server->config->motd &&
2696 server->config->motd->motd_file) {
2698 motd = silc_file_read(server->config->motd->motd_file, &motd_len);
2702 silc_server_send_notify(server, sock, SILC_NOTIFY_TYPE_MOTD, 1,
2708 /* Sends error message. Error messages may or may not have any
2711 void silc_server_send_error(SilcServer server,
2712 SilcSocketConnection sock,
2713 const char *fmt, ...)
2716 unsigned char buf[4096];
2718 memset(buf, 0, sizeof(buf));
2720 vsprintf(buf, fmt, ap);
2723 silc_server_packet_send(server, sock, SILC_PACKET_ERROR, 0,
2724 buf, strlen(buf), FALSE);
2727 /* Sends notify message. If format is TRUE the variable arguments are
2728 formatted and the formatted string is sent as argument payload. If it is
2729 FALSE then each argument is sent as separate argument and their format
2730 in the argument list must be { argument data, argument length }. */
2732 void silc_server_send_notify(SilcServer server,
2733 SilcSocketConnection sock,
2734 SilcNotifyType type,
2735 unsigned int argc, ...)
2742 packet = silc_notify_payload_encode(type, argc, ap);
2743 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY, 0,
2744 packet->data, packet->len, FALSE);
2745 silc_buffer_free(packet);
2748 /* Sends notify message destined to specific entity. */
2750 void silc_server_send_notify_dest(SilcServer server,
2751 SilcSocketConnection sock,
2753 SilcIdType dest_id_type,
2754 SilcNotifyType type,
2755 unsigned int argc, ...)
2762 packet = silc_notify_payload_encode(type, argc, ap);
2763 silc_server_packet_send_dest(server, sock, SILC_PACKET_NOTIFY, 0,
2764 dest_id, dest_id_type,
2765 packet->data, packet->len, FALSE);
2766 silc_buffer_free(packet);
2769 /* Sends notify message to a channel. The notify message sent is
2770 distributed to all clients on the channel. */
2772 void silc_server_send_notify_to_channel(SilcServer server,
2773 SilcChannelEntry channel,
2774 SilcNotifyType type,
2775 unsigned int argc, ...)
2782 packet = silc_notify_payload_encode(type, argc, ap);
2783 silc_server_packet_send_to_channel(server, channel,
2785 packet->data, packet->len, FALSE);
2786 silc_buffer_free(packet);
2789 /* Send notify message to all clients the client has joined. It is quaranteed
2790 that the message is sent only once to a client (ie. if a client is joined
2791 on two same channel it will receive only one notify message). Also, this
2792 sends only to local clients (locally connected if we are server, and to
2793 local servers if we are router). */
2795 void silc_server_send_notify_on_channels(SilcServer server,
2796 SilcClientEntry client,
2797 SilcNotifyType type,
2798 unsigned int argc, ...)
2801 SilcSocketConnection sock = NULL;
2802 SilcPacketContext packetdata;
2804 SilcClientEntry *sent_clients = NULL;
2805 unsigned int sent_clients_count = 0;
2806 SilcServerEntry *routed = NULL;
2807 unsigned int routed_count = 0;
2808 SilcChannelEntry channel;
2809 SilcChannelClientEntry chl;
2813 unsigned char *data;
2814 unsigned int data_len;
2815 int force_send = FALSE;
2818 if (!client->channel_count)
2822 packet = silc_notify_payload_encode(type, argc, ap);
2823 data = packet->data;
2824 data_len = packet->len;
2826 /* Set the packet context pointers. */
2827 packetdata.flags = 0;
2828 packetdata.type = SILC_PACKET_NOTIFY;
2829 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
2830 packetdata.src_id_len = SILC_ID_SERVER_LEN;
2831 packetdata.src_id_type = SILC_ID_SERVER;
2832 packetdata.rng = server->rng;
2834 for (i = 0; i < client->channel_count; i++) {
2835 channel = client->channel[i];
2837 /* Send the message to clients on the channel's client list. */
2838 silc_list_start(channel->user_list);
2839 while ((chl = silc_list_get(channel->user_list)) != SILC_LIST_END) {
2842 /* Check if we have sent the packet to this client already */
2843 for (k = 0; k < sent_clients_count; k++)
2844 if (sent_clients[k] == c)
2846 if (k < sent_clients_count)
2849 /* If we are router and if this client has router set it is not
2850 locally connected client and we will route the message to the
2851 router set in the client. */
2852 if (c && c->router && server->server_type == SILC_ROUTER) {
2853 /* Check if we have sent the packet to this route already */
2854 for (k = 0; k < routed_count; k++)
2855 if (routed[k] == c->router)
2857 if (k < routed_count)
2860 /* Get data used in packet header encryption, keys and stuff. */
2861 sock = (SilcSocketConnection)c->router->connection;
2862 cipher = c->router->send_key;
2863 hmac = c->router->hmac;
2865 packetdata.dst_id = silc_id_id2str(c->router->id, SILC_ID_SERVER);
2866 packetdata.dst_id_len = SILC_ID_SERVER_LEN;
2867 packetdata.dst_id_type = SILC_ID_SERVER;
2868 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
2869 packetdata.src_id_len + packetdata.dst_id_len;
2870 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
2872 /* Send the packet */
2873 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
2875 data_len, FALSE, force_send);
2877 silc_free(packetdata.dst_id);
2879 /* We want to make sure that the packet is routed to same router
2880 only once. Mark this route as sent route. */
2882 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
2883 routed[k] = c->router;
2889 /* Send to locally connected client */
2892 /* Get data used in packet header encryption, keys and stuff. */
2893 sock = (SilcSocketConnection)c->connection;
2894 cipher = c->send_key;
2897 packetdata.dst_id = silc_id_id2str(c->id, SILC_ID_CLIENT);
2898 packetdata.dst_id_len = SILC_ID_CLIENT_LEN;
2899 packetdata.dst_id_type = SILC_ID_CLIENT;
2900 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
2901 packetdata.src_id_len + packetdata.dst_id_len;
2902 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
2904 /* Send the packet */
2905 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
2907 data_len, FALSE, force_send);
2909 silc_free(packetdata.dst_id);
2911 /* Make sure that we send the notify only once per client. */
2912 sent_clients = silc_realloc(sent_clients, sizeof(*sent_clients) *
2913 (sent_clients_count + 1));
2914 sent_clients[sent_clients_count] = c;
2915 sent_clients_count++;
2922 if (sent_clients_count)
2923 silc_free(sent_clients);
2924 silc_free(packetdata.src_id);
2927 /* Sends New ID Payload to remote end. The packet is used to distribute
2928 information about new registered clients, servers, channel etc. usually
2929 to routers so that they can keep these information up to date.
2930 If the argument `broadcast' is TRUE then the packet is sent as
2931 broadcast packet. */
2933 void silc_server_send_new_id(SilcServer server,
2934 SilcSocketConnection sock,
2936 void *id, SilcIdType id_type,
2937 unsigned int id_len)
2941 idp = silc_id_payload_encode(id, id_type);
2942 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID,
2943 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
2944 idp->data, idp->len, FALSE);
2945 silc_buffer_free(idp);
2948 /* Sends Replace ID payload to remote end. This is used to replace old
2949 ID with new ID sent in the packet. This is called for example when
2950 user changes nickname and we create new ID for the user. If the
2951 argument `broadcast' is TRUE then the packet is sent as
2952 broadcast packet. */
2953 /* XXX It would be expected that the new id is same type as the old
2956 void silc_server_send_replace_id(SilcServer server,
2957 SilcSocketConnection sock,
2959 void *old_id, SilcIdType old_id_type,
2960 unsigned int old_id_len,
2961 void *new_id, SilcIdType new_id_type,
2962 unsigned int new_id_len)
2968 oid = silc_id_id2str(old_id, old_id_type);
2972 nid = silc_id_id2str(new_id, new_id_type);
2976 packet = silc_buffer_alloc(2 + 2 + 2 + 2 + old_id_len + new_id_len);
2977 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2978 silc_buffer_format(packet,
2979 SILC_STR_UI_SHORT(old_id_type),
2980 SILC_STR_UI_SHORT(old_id_len),
2981 SILC_STR_UI_XNSTRING(oid, old_id_len),
2982 SILC_STR_UI_SHORT(new_id_type),
2983 SILC_STR_UI_SHORT(new_id_len),
2984 SILC_STR_UI_XNSTRING(nid, new_id_len),
2987 silc_server_packet_send(server, sock, SILC_PACKET_REPLACE_ID,
2988 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
2989 packet->data, packet->len, FALSE);
2992 silc_buffer_free(packet);
2995 /* This function is used to send Remove Channel User payload. This may sent
2996 by server but is usually used only by router to notify other routers that
2997 user has left a channel. Normal server sends this packet to its router
2998 to notify that the router should not hold a record about this client
2999 on a channel anymore. Router distributes it further to other routers. */
3001 void silc_server_send_remove_channel_user(SilcServer server,
3002 SilcSocketConnection sock,
3004 void *client_id, void *channel_id)
3007 unsigned char *clid, *chid;
3009 clid = silc_id_id2str(client_id, SILC_ID_CLIENT);
3013 chid = silc_id_id2str(channel_id, SILC_ID_CHANNEL);
3017 packet = silc_buffer_alloc(2 + 2 + SILC_ID_CLIENT_LEN + SILC_ID_CHANNEL_LEN);
3018 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
3019 silc_buffer_format(packet,
3020 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
3021 SILC_STR_UI_XNSTRING(clid, SILC_ID_CLIENT_LEN),
3022 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3023 SILC_STR_UI_XNSTRING(chid, SILC_ID_CHANNEL_LEN),
3026 silc_server_packet_send(server, sock, SILC_PACKET_REMOVE_CHANNEL_USER,
3027 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
3028 packet->data, packet->len, FALSE);
3031 silc_buffer_free(packet);
3034 /* Received packet to replace a ID. This checks that the requested ID
3035 exists and replaces it with the new one. */
3037 void silc_server_replace_id(SilcServer server,
3038 SilcSocketConnection sock,
3039 SilcPacketContext *packet)
3041 SilcBuffer buffer = packet->buffer;
3042 unsigned char *old_id = NULL, *new_id = NULL;
3043 SilcIdType old_id_type, new_id_type;
3044 unsigned short old_id_len, new_id_len;
3045 void *id = NULL, *id2 = NULL;
3047 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
3048 packet->src_id_type == SILC_ID_CLIENT)
3051 SILC_LOG_DEBUG(("Replacing ID"));
3053 silc_buffer_unformat(buffer,
3054 SILC_STR_UI_SHORT(&old_id_type),
3055 SILC_STR_UI16_NSTRING_ALLOC(&old_id, &old_id_len),
3056 SILC_STR_UI_SHORT(&new_id_type),
3057 SILC_STR_UI16_NSTRING_ALLOC(&new_id, &new_id_len),
3060 if (old_id_type != new_id_type)
3063 if (old_id_len != silc_id_get_len(old_id_type) ||
3064 new_id_len != silc_id_get_len(new_id_type))
3067 id = silc_id_str2id(old_id, old_id_type);
3071 id2 = silc_id_str2id(new_id, new_id_type);
3075 /* Replace the old ID */
3076 switch(old_id_type) {
3077 case SILC_ID_CLIENT:
3078 if (silc_idlist_replace_client_id(server->local_list, id, id2) == NULL)
3079 if (server->server_type == SILC_ROUTER)
3080 silc_idlist_replace_client_id(server->global_list, id, id2);
3083 case SILC_ID_SERVER:
3084 if (silc_idlist_replace_server_id(server->local_list, id, id2) == NULL)
3085 if (server->server_type == SILC_ROUTER)
3086 silc_idlist_replace_server_id(server->global_list, id, id2);
3089 case SILC_ID_CHANNEL:
3090 /* XXX Hmm... Basically this cannot occur. Channel ID's cannot be
3109 /* Creates new channel. */
3111 SilcChannelEntry silc_server_new_channel(SilcServer server,
3112 SilcServerID *router_id,
3113 char *cipher, char *channel_name)
3115 int i, channel_len, key_len;
3116 SilcChannelID *channel_id;
3117 SilcChannelEntry entry;
3119 unsigned char channel_key[32], *id_string;
3122 SILC_LOG_DEBUG(("Creating new channel"));
3124 /* Create channel key */
3125 for (i = 0; i < 32; i++)
3126 channel_key[i] = silc_rng_get_byte(server->rng);
3133 silc_cipher_alloc(cipher, &key);
3134 key->cipher->set_key(key->context, channel_key, key_len);
3136 channel_name = strdup(channel_name);
3138 /* Create the channel */
3139 silc_id_create_channel_id(router_id, server->rng, &channel_id);
3140 entry = silc_idlist_add_channel(server->local_list, channel_name,
3141 SILC_CHANNEL_MODE_NONE, channel_id,
3144 silc_free(channel_name);
3150 silc_idcache_add(server->local_list->channels, channel_name,
3151 SILC_ID_CHANNEL, channel_id, (void *)entry, TRUE);
3154 entry->key = silc_calloc(key_len, sizeof(*entry->key));
3155 entry->key_len = key_len * 8;
3156 memcpy(entry->key, channel_key, key_len);
3157 memset(channel_key, 0, sizeof(channel_key));
3159 /* Notify other routers about the new channel. We send the packet
3160 to our primary route. */
3161 if (server->standalone == FALSE) {
3162 channel_len = strlen(channel_name);
3163 id_string = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3164 packet = silc_buffer_alloc(2 + SILC_ID_CHANNEL_LEN);
3166 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
3167 silc_buffer_format(packet,
3168 SILC_STR_UI_SHORT(channel_len),
3169 SILC_STR_UI_XNSTRING(channel_name, channel_len),
3170 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3171 SILC_STR_UI_XNSTRING(id_string, SILC_ID_CHANNEL_LEN),
3174 /* Send the packet to our router. */
3175 silc_server_packet_send(server, (SilcSocketConnection)
3176 server->id_entry->router->connection,
3177 SILC_PACKET_NEW_CHANNEL_USER, 0,
3178 packet->data, packet->len, TRUE);
3180 silc_free(id_string);
3181 silc_buffer_free(packet);
3187 /* Create new client. This processes incoming NEW_CLIENT packet and creates
3188 Client ID for the client. Client becomes registered after calling this
3191 SilcClientEntry silc_server_new_client(SilcServer server,
3192 SilcSocketConnection sock,
3193 SilcPacketContext *packet)
3195 SilcBuffer buffer = packet->buffer;
3196 SilcClientEntry client;
3197 SilcIDCacheEntry cache;
3198 SilcClientID *client_id;
3200 char *username = NULL, *realname = NULL, *id_string;
3202 SILC_LOG_DEBUG(("Creating new client"));
3204 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
3207 /* Take client entry */
3208 client = (SilcClientEntry)sock->user_data;
3210 /* Fetch the old client cache entry so that we can update it. */
3211 if (!silc_idcache_find_by_context(server->local_list->clients,
3212 sock->user_data, &cache)) {
3213 SILC_LOG_ERROR(("Lost client's cache entry - bad thing"));
3217 /* Parse incoming packet */
3218 silc_buffer_unformat(buffer,
3219 SILC_STR_UI16_STRING_ALLOC(&username),
3220 SILC_STR_UI16_STRING_ALLOC(&realname),
3223 /* Create Client ID */
3224 silc_id_create_client_id(server->id, server->rng, server->md5hash,
3225 username, &client_id);
3227 /* Update client entry */
3228 client->registered = TRUE;
3229 client->nickname = strdup(username);
3230 client->username = username;
3231 client->userinfo = realname;
3232 client->id = client_id;
3234 /* Update the cache entry */
3235 cache->id = (void *)client_id;
3236 cache->type = SILC_ID_CLIENT;
3237 cache->data = username;
3238 silc_idcache_sort_by_data(server->local_list->clients);
3240 /* Notify our router about new client on the SILC network */
3241 if (!server->standalone)
3242 silc_server_send_new_id(server, (SilcSocketConnection)
3243 server->id_entry->router->connection,
3244 server->server_type == SILC_SERVER ? TRUE : FALSE,
3245 client->id, SILC_ID_CLIENT, SILC_ID_CLIENT_LEN);
3247 /* Send the new client ID to the client. */
3248 id_string = silc_id_id2str(client->id, SILC_ID_CLIENT);
3249 reply = silc_buffer_alloc(2 + 2 + SILC_ID_CLIENT_LEN);
3250 silc_buffer_pull_tail(reply, SILC_BUFFER_END(reply));
3251 silc_buffer_format(reply,
3252 SILC_STR_UI_SHORT(SILC_ID_CLIENT),
3253 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
3254 SILC_STR_UI_XNSTRING(id_string, SILC_ID_CLIENT_LEN),
3256 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID, 0,
3257 reply->data, reply->len, FALSE);
3258 silc_free(id_string);
3259 silc_buffer_free(reply);
3261 /* Send some nice info to the client */
3262 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
3263 ("Welcome to the SILC Network %s@%s",
3264 username, sock->hostname));
3265 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
3266 ("Your host is %s, running version %s",
3267 server->config->server_info->server_name,
3269 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
3270 ("Your connection is secured with %s cipher, "
3271 "key length %d bits",
3272 client->send_key->cipher->name,
3273 client->send_key->cipher->key_len));
3274 SILC_SERVER_SEND_NOTIFY(server, sock, SILC_NOTIFY_TYPE_NONE,
3275 ("Your current nickname is %s",
3279 silc_server_send_motd(server, sock);
3284 /* Create new server. This processes incoming NEW_SERVER packet and
3285 saves the received Server ID. The server is our locally connected
3286 server thus we save all the information and save it to local list.
3287 This funtion can be used by both normal server and router server.
3288 If normal server uses this it means that its router has connected
3289 to the server. If router uses this it means that one of the cell's
3290 servers is connected to the router. */
3292 SilcServerEntry silc_server_new_server(SilcServer server,
3293 SilcSocketConnection sock,
3294 SilcPacketContext *packet)
3296 SilcBuffer buffer = packet->buffer;
3297 SilcServerEntry new_server;
3298 SilcIDCacheEntry cache;
3299 SilcServerID *server_id;
3300 unsigned char *server_name, *id_string;
3301 unsigned short id_len;
3303 SILC_LOG_DEBUG(("Creating new server"));
3305 if (sock->type != SILC_SOCKET_TYPE_SERVER &&
3306 sock->type != SILC_SOCKET_TYPE_ROUTER)
3309 /* Take server entry */
3310 new_server = (SilcServerEntry)sock->user_data;
3312 /* Fetch the old server cache entry so that we can update it. */
3313 if (!silc_idcache_find_by_context(server->local_list->servers,
3314 sock->user_data, &cache)) {
3315 SILC_LOG_ERROR(("Lost server's cache entry - bad thing"));
3319 /* Parse the incoming packet */
3320 silc_buffer_unformat(buffer,
3321 SILC_STR_UI16_NSTRING_ALLOC(&id_string, &id_len),
3322 SILC_STR_UI16_STRING_ALLOC(&server_name),
3325 if (id_len > buffer->len) {
3326 silc_free(id_string);
3327 silc_free(server_name);
3332 server_id = silc_id_payload_parse_id(id_string, id_len);
3333 silc_free(id_string);
3335 /* Update client entry */
3336 new_server->registered = TRUE;
3337 new_server->server_name = server_name;
3338 new_server->id = server_id;
3340 /* Update the cache entry */
3341 cache->id = (void *)server_id;
3342 cache->type = SILC_ID_SERVER;
3343 cache->data = server_name;
3344 silc_idcache_sort_by_data(server->local_list->servers);
3346 /* Distribute the information about new server in the SILC network
3347 to our router. If we are normal server we won't send anything
3348 since this connection must be our router connection. */
3349 if (server->server_type == SILC_ROUTER && !server->standalone)
3350 silc_server_send_new_id(server, server->id_entry->router->connection,
3351 TRUE, new_server->id, SILC_ID_SERVER,
3352 SILC_ID_SERVER_LEN);
3357 /* Processes incoming New ID Payload. New ID Payload is used to distribute
3358 information about newly registered clients, servers and created
3361 void silc_server_new_id(SilcServer server, SilcSocketConnection sock,
3362 SilcPacketContext *packet)
3364 SilcBuffer buffer = packet->buffer;
3366 SilcServerEntry tmpserver, router;
3367 SilcSocketConnection router_sock;
3372 SILC_LOG_DEBUG(("Processing new ID"));
3374 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
3375 server->server_type == SILC_SERVER ||
3376 packet->src_id_type != SILC_ID_SERVER)
3379 idp = silc_id_payload_parse(buffer);
3383 id_type = silc_id_payload_get_type(idp);
3385 /* Normal server cannot have other normal server connections */
3386 if (id_type == SILC_ID_SERVER && sock->type == SILC_SOCKET_TYPE_SERVER)
3389 id = silc_id_payload_get_id(idp);
3393 /* If the packet is originated from the one who sent it to us we know
3394 that the ID belongs to our cell, unless the sender was router. */
3395 tmpid = silc_id_str2id(packet->src_id, SILC_ID_SERVER);
3396 tmpserver = (SilcServerEntry)sock->user_data;
3398 if (!SILC_ID_SERVER_COMPARE(tmpid, tmpserver->id) &&
3399 sock->type == SILC_SOCKET_TYPE_SERVER) {
3400 id_list = server->local_list;
3402 router = sock->user_data;
3403 /* router = server->id_entry; */
3405 id_list = server->global_list;
3406 router_sock = (SilcSocketConnection)server->id_entry->router->connection;
3407 router = server->id_entry->router;
3413 case SILC_ID_CLIENT:
3415 SilcClientEntry idlist;
3417 /* Add the client to our local list. We are router and we keep
3418 cell specific local database of all clients in the cell. */
3419 idlist = silc_idlist_add_client(id_list, NULL, NULL, NULL,
3420 id, router, NULL, NULL,
3421 NULL, NULL, NULL, router_sock);
3425 case SILC_ID_SERVER:
3427 SilcServerEntry idlist;
3429 /* Add the server to our local list. We are router and we keep
3430 cell specific local database of all servers in the cell. */
3431 idlist = silc_idlist_add_server(id_list, NULL, 0,
3432 id, router, NULL, NULL,
3433 NULL, NULL, NULL, router_sock);
3437 case SILC_ID_CHANNEL:
3438 /* Add the channel to our local list. We are router and we keep
3439 cell specific local database of all channels in the cell. */
3440 silc_idlist_add_channel(id_list, NULL, 0, id, router, NULL);
3448 silc_id_payload_free(idp);
3451 /* Received packet to remove a user from a channel. Routers notify other
3452 routers that user has left a channel. Client must not send this packet.
3453 Normal server may send this packet but ignores if it receives one. */
3455 void silc_server_remove_channel_user(SilcServer server,
3456 SilcSocketConnection sock,
3457 SilcPacketContext *packet)
3459 SilcBuffer buffer = packet->buffer;
3460 unsigned char *tmp1 = NULL, *tmp2 = NULL;
3461 SilcClientID *client_id = NULL;
3462 SilcChannelID *channel_id = NULL;
3463 SilcChannelEntry channel;
3464 SilcClientEntry client;
3466 SILC_LOG_DEBUG(("Removing user from channel"));
3468 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
3469 server->server_type == SILC_SERVER)
3472 silc_buffer_unformat(buffer,
3473 SILC_STR_UI16_STRING_ALLOC(&tmp1),
3474 SILC_STR_UI16_STRING_ALLOC(&tmp2),
3480 client_id = silc_id_str2id(tmp1, SILC_ID_CLIENT);
3481 channel_id = silc_id_str2id(tmp2, SILC_ID_CHANNEL);
3482 if (!client_id || !channel_id)
3485 /* XXX routers should check server->global_list as well */
3486 /* Get channel entry */
3487 channel = silc_idlist_find_channel_by_id(server->local_list, channel_id);
3491 /* XXX routers should check server->global_list as well */
3492 /* Get client entry */
3493 client = silc_idlist_find_client_by_id(server->local_list, client_id);
3497 /* Remove from channel */
3498 silc_server_remove_from_one_channel(server, sock, channel, client, FALSE);
3506 silc_free(client_id);
3508 silc_free(channel_id);