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(parse_ctx);
1203 /* Parser callback called by silc_packet_receive_process. This merely
1204 registers timeout that will handle the actual parsing whem appropriate. */
1206 void silc_server_packet_parse(SilcPacketParserContext *parser_context)
1208 SilcServer server = (SilcServer)parser_context->context;
1209 SilcSocketConnection sock = parser_context->sock;
1211 switch (sock->type) {
1212 case SILC_SOCKET_TYPE_CLIENT:
1213 case SILC_SOCKET_TYPE_UNKNOWN:
1214 /* Parse the packet with timeout */
1215 silc_task_register(server->timeout_queue, sock->sock,
1216 silc_server_packet_parse_real,
1217 (void *)parser_context, 0, 100000,
1219 SILC_TASK_PRI_NORMAL);
1221 case SILC_SOCKET_TYPE_SERVER:
1222 case SILC_SOCKET_TYPE_ROUTER:
1223 /* Packets from servers are parsed as soon as possible */
1224 silc_task_register(server->timeout_queue, sock->sock,
1225 silc_server_packet_parse_real,
1226 (void *)parser_context, 0, 1,
1228 SILC_TASK_PRI_NORMAL);
1235 /* Parses the packet type and calls what ever routines the packet type
1236 requires. This is done for all incoming packets. */
1238 void silc_server_packet_parse_type(SilcServer server,
1239 SilcSocketConnection sock,
1240 SilcPacketContext *packet)
1242 SilcBuffer buffer = packet->buffer;
1243 SilcPacketType type = packet->type;
1245 SILC_LOG_DEBUG(("Parsing packet type %d", type));
1247 /* Parse the packet type */
1249 case SILC_PACKET_DISCONNECT:
1250 SILC_LOG_DEBUG(("Disconnect packet"));
1252 case SILC_PACKET_SUCCESS:
1254 * Success received for something. For now we can have only
1255 * one protocol for connection executing at once hence this
1256 * success message is for whatever protocol is executing currently.
1258 SILC_LOG_DEBUG(("Success packet"));
1259 if (sock->protocol) {
1260 sock->protocol->execute(server->timeout_queue, 0,
1261 sock->protocol, sock->sock, 0, 0);
1264 case SILC_PACKET_FAILURE:
1265 SILC_LOG_DEBUG(("Failure packet"));
1267 case SILC_PACKET_REJECT:
1268 SILC_LOG_DEBUG(("Reject packet"));
1275 case SILC_PACKET_CHANNEL_MESSAGE:
1277 * Received channel message. Channel messages are special packets
1278 * (although probably most common ones) hence they are handled
1281 SILC_LOG_DEBUG(("Channel Message packet"));
1282 silc_server_channel_message(server, sock, packet);
1285 case SILC_PACKET_CHANNEL_KEY:
1287 * Received key for channel. As channels are created by the router
1288 * the keys are as well. We will distribute the key to all of our
1289 * locally connected clients on the particular channel. Router
1290 * never receives this channel and thus is ignored.
1292 SILC_LOG_DEBUG(("Channel Key packet"));
1293 silc_server_channel_key(server, sock, packet);
1299 case SILC_PACKET_COMMAND:
1301 * Recived command. Allocate command context and execute the command.
1303 SILC_LOG_DEBUG(("Command packet"));
1304 silc_server_command_process(server, sock, packet);
1307 case SILC_PACKET_COMMAND_REPLY:
1309 * Received command reply packet. Servers never send commands thus
1310 * they don't receive command reply packets either, except in cases
1311 * where server has forwarded command packet coming from client.
1312 * This must be the case here or we will ignore the packet.
1314 SILC_LOG_DEBUG(("Command Reply packet"));
1315 silc_server_packet_relay_command_reply(server, sock, packet);
1319 * Private Message packets
1321 case SILC_PACKET_PRIVATE_MESSAGE:
1323 * Received private message packet. The packet is coming from either
1326 SILC_LOG_DEBUG(("Private Message packet"));
1327 silc_server_private_message(server, sock, packet);
1330 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
1334 * Key Exchange protocol packets
1336 case SILC_PACKET_KEY_EXCHANGE:
1337 SILC_LOG_DEBUG(("KE packet"));
1338 if (sock->protocol && sock->protocol->protocol->type
1339 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1341 SilcServerKEInternalContext *proto_ctx =
1342 (SilcServerKEInternalContext *)sock->protocol->context;
1344 proto_ctx->packet = buffer;
1346 /* Let the protocol handle the packet */
1347 sock->protocol->execute(server->timeout_queue, 0,
1348 sock->protocol, sock->sock, 0, 100000);
1350 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
1351 "protocol active, packet dropped."));
1353 /* XXX Trigger KE protocol?? Rekey actually, maybe. */
1357 case SILC_PACKET_KEY_EXCHANGE_1:
1358 SILC_LOG_DEBUG(("KE 1 packet"));
1359 if (sock->protocol && sock->protocol->protocol->type
1360 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1362 SilcServerKEInternalContext *proto_ctx =
1363 (SilcServerKEInternalContext *)sock->protocol->context;
1365 if (proto_ctx->packet)
1366 silc_buffer_free(proto_ctx->packet);
1368 proto_ctx->packet = buffer;
1369 proto_ctx->dest_id_type = packet->src_id_type;
1370 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_type);
1372 /* Let the protocol handle the packet */
1373 sock->protocol->execute(server->timeout_queue, 0,
1374 sock->protocol, sock->sock,
1377 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
1378 "protocol active, packet dropped."));
1382 case SILC_PACKET_KEY_EXCHANGE_2:
1383 SILC_LOG_DEBUG(("KE 2 packet"));
1384 if (sock->protocol && sock->protocol->protocol->type
1385 == SILC_PROTOCOL_SERVER_KEY_EXCHANGE) {
1387 SilcServerKEInternalContext *proto_ctx =
1388 (SilcServerKEInternalContext *)sock->protocol->context;
1390 if (proto_ctx->packet)
1391 silc_buffer_free(proto_ctx->packet);
1393 proto_ctx->packet = buffer;
1394 proto_ctx->dest_id_type = packet->src_id_type;
1395 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_type);
1397 /* Let the protocol handle the packet */
1398 sock->protocol->execute(server->timeout_queue, 0,
1399 sock->protocol, sock->sock,
1402 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
1403 "protocol active, packet dropped."));
1407 case SILC_PACKET_CONNECTION_AUTH_REQUEST:
1408 /* If we receive this packet we will send to the other end information
1409 about our mandatory authentication method for the connection.
1410 This packet maybe received at any time. */
1413 * Connection Authentication protocol packets
1415 case SILC_PACKET_CONNECTION_AUTH:
1416 /* Start of the authentication protocol. We receive here the
1417 authentication data and will verify it. */
1418 SILC_LOG_DEBUG(("Connection auth packet"));
1419 if (sock->protocol && sock->protocol->protocol->type
1420 == SILC_PROTOCOL_SERVER_CONNECTION_AUTH) {
1422 SilcServerConnAuthInternalContext *proto_ctx =
1423 (SilcServerConnAuthInternalContext *)sock->protocol->context;
1425 proto_ctx->packet = buffer;
1427 /* Let the protocol handle the packet */
1428 sock->protocol->execute(server->timeout_queue, 0,
1429 sock->protocol, sock->sock, 0, 0);
1431 SILC_LOG_ERROR(("Received Connection Auth packet but no authentication "
1432 "protocol active, packet dropped."));
1436 case SILC_PACKET_NEW_ID:
1438 * Received New ID packet. This includes some new ID that has been
1439 * created. It may be for client, server or channel. This is the way
1440 * to distribute information about new registered entities in the
1443 SILC_LOG_DEBUG(("New ID packet"));
1444 silc_server_new_id(server, sock, packet);
1447 case SILC_PACKET_NEW_CLIENT:
1449 * Received new client packet. This includes client information that
1450 * we will use to create initial client ID. After creating new
1451 * ID we will send it to the client.
1453 SILC_LOG_DEBUG(("New Client packet"));
1454 silc_server_new_client(server, sock, packet);
1457 case SILC_PACKET_NEW_SERVER:
1459 * Received new server packet. This includes Server ID and some other
1460 * information that we may save. This is received after server has
1463 SILC_LOG_DEBUG(("New Server packet"));
1464 silc_server_new_server(server, sock, packet);
1467 case SILC_PACKET_NEW_CHANNEL:
1470 case SILC_PACKET_NEW_CHANNEL_USER:
1473 case SILC_PACKET_NEW_CHANNEL_LIST:
1476 case SILC_PACKET_NEW_CHANNEL_USER_LIST:
1479 case SILC_PACKET_REPLACE_ID:
1481 * Received replace ID packet. This sends the old ID that is to be
1482 * replaced with the new one included into the packet. Client must not
1485 SILC_LOG_DEBUG(("Replace ID packet"));
1486 silc_server_replace_id(server, sock, packet);
1489 case SILC_PACKET_REMOVE_ID:
1492 case SILC_PACKET_REMOVE_CHANNEL_USER:
1494 * Received packet to remove user from a channel. Routers notify other
1495 * routers about a user leaving a channel.
1497 SILC_LOG_DEBUG(("Remove Channel User packet"));
1498 silc_server_remove_channel_user(server, sock, packet);
1502 SILC_LOG_ERROR(("Incorrect packet type %d, packet dropped", type));
1508 /* Assembles a new packet to be sent out to network. This doesn't actually
1509 send the packet but creates the packet and fills the outgoing data
1510 buffer and marks the packet ready to be sent to network. However, If
1511 argument force_send is TRUE the packet is sent immediately and not put
1512 to queue. Normal case is that the packet is not sent immediately. */
1514 void silc_server_packet_send(SilcServer server,
1515 SilcSocketConnection sock,
1516 SilcPacketType type,
1517 SilcPacketFlags flags,
1518 unsigned char *data,
1519 unsigned int data_len,
1522 void *dst_id = NULL;
1523 SilcIdType dst_id_type = SILC_ID_NONE;
1528 /* Get data used in the packet sending, keys and stuff */
1529 switch(sock->type) {
1530 case SILC_SOCKET_TYPE_CLIENT:
1531 if (((SilcClientEntry)sock->user_data)->id) {
1532 dst_id = ((SilcClientEntry)sock->user_data)->id;
1533 dst_id_type = SILC_ID_CLIENT;
1536 case SILC_SOCKET_TYPE_SERVER:
1537 case SILC_SOCKET_TYPE_ROUTER:
1538 if (((SilcServerEntry)sock->user_data)->id) {
1539 dst_id = ((SilcServerEntry)sock->user_data)->id;
1540 dst_id_type = SILC_ID_SERVER;
1547 silc_server_packet_send_dest(server, sock, type, flags, dst_id,
1548 dst_id_type, data, data_len, force_send);
1551 /* Assembles a new packet to be sent out to network. This doesn't actually
1552 send the packet but creates the packet and fills the outgoing data
1553 buffer and marks the packet ready to be sent to network. However, If
1554 argument force_send is TRUE the packet is sent immediately and not put
1555 to queue. Normal case is that the packet is not sent immediately.
1556 Destination information is sent as argument for this function. */
1558 void silc_server_packet_send_dest(SilcServer server,
1559 SilcSocketConnection sock,
1560 SilcPacketType type,
1561 SilcPacketFlags flags,
1563 SilcIdType dst_id_type,
1564 unsigned char *data,
1565 unsigned int data_len,
1568 SilcPacketContext packetdata;
1569 SilcCipher cipher = NULL;
1570 SilcHmac hmac = NULL;
1571 unsigned char *dst_id_data = NULL;
1572 unsigned int dst_id_len = 0;
1574 SILC_LOG_DEBUG(("Sending packet, type %d", type));
1576 /* Get data used in the packet sending, keys and stuff */
1577 switch(sock->type) {
1578 case SILC_SOCKET_TYPE_CLIENT:
1579 if (sock->user_data) {
1580 cipher = ((SilcClientEntry)sock->user_data)->send_key;
1581 hmac = ((SilcClientEntry)sock->user_data)->hmac;
1584 case SILC_SOCKET_TYPE_SERVER:
1585 case SILC_SOCKET_TYPE_ROUTER:
1586 if (sock->user_data) {
1587 cipher = ((SilcServerEntry)sock->user_data)->send_key;
1588 hmac = ((SilcServerEntry)sock->user_data)->hmac;
1592 if (sock->user_data) {
1593 /* We don't know what type of connection this is thus it must
1594 be in authentication phase. */
1595 cipher = ((SilcUnknownEntry)sock->user_data)->send_key;
1596 hmac = ((SilcUnknownEntry)sock->user_data)->hmac;
1602 dst_id_data = silc_id_id2str(dst_id, dst_id_type);
1603 dst_id_len = silc_id_get_len(dst_id_type);
1606 /* Set the packet context pointers */
1607 packetdata.type = type;
1608 packetdata.flags = flags;
1609 packetdata.src_id = silc_id_id2str(server->id, server->id_type);
1610 packetdata.src_id_len = SILC_ID_SERVER_LEN;
1611 packetdata.src_id_type = server->id_type;
1612 packetdata.dst_id = dst_id_data;
1613 packetdata.dst_id_len = dst_id_len;
1614 packetdata.dst_id_type = dst_id_type;
1615 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1616 packetdata.src_id_len + dst_id_len;
1617 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1618 packetdata.rng = server->rng;
1620 /* Prepare outgoing data buffer for packet sending */
1621 silc_packet_send_prepare(sock,
1622 SILC_PACKET_HEADER_LEN +
1623 packetdata.src_id_len +
1624 packetdata.dst_id_len,
1628 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
1630 packetdata.buffer = sock->outbuf;
1632 /* Put the data to the buffer */
1633 if (data && data_len)
1634 silc_buffer_put(sock->outbuf, data, data_len);
1636 /* Create the outgoing packet */
1637 silc_packet_assemble(&packetdata);
1639 /* Encrypt the packet */
1641 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1643 SILC_LOG_HEXDUMP(("Outgoing packet, len %d", sock->outbuf->len),
1644 sock->outbuf->data, sock->outbuf->len);
1646 /* Now actually send the packet */
1647 silc_server_packet_send_real(server, sock, force_send);
1649 if (packetdata.src_id)
1650 silc_free(packetdata.src_id);
1651 if (packetdata.dst_id)
1652 silc_free(packetdata.dst_id);
1655 /* Forwards packet. Packets sent with this function will be marked as
1656 forwarded (in the SILC header flags) so that the receiver knows that
1657 we have forwarded the packet to it. Forwarded packets are handled
1658 specially by the receiver as they are not destined to the receiver
1659 originally. However, the receiver knows this because the forwarded
1660 flag has been set (and the flag is authenticated). */
1662 void silc_server_packet_forward(SilcServer server,
1663 SilcSocketConnection sock,
1664 unsigned char *data, unsigned int data_len,
1667 SilcCipher cipher = NULL;
1668 SilcHmac hmac = NULL;
1670 SILC_LOG_DEBUG(("Forwarding packet"));
1672 /* Get data used in the packet sending, keys and stuff */
1673 switch(sock->type) {
1674 case SILC_SOCKET_TYPE_CLIENT:
1675 if (sock->user_data) {
1676 cipher = ((SilcClientEntry )sock->user_data)->send_key;
1677 hmac = ((SilcClientEntry )sock->user_data)->hmac;
1680 case SILC_SOCKET_TYPE_SERVER:
1681 case SILC_SOCKET_TYPE_ROUTER:
1682 if (sock->user_data) {
1683 cipher = ((SilcServerEntry )sock->user_data)->send_key;
1684 hmac = ((SilcServerEntry )sock->user_data)->hmac;
1688 /* We won't forward to unknown destination - keys must exist with
1689 the destination before forwarding. */
1693 /* Prepare outgoing data buffer for packet sending */
1694 silc_packet_send_prepare(sock, 0, 0, data_len);
1696 /* Mungle the packet flags and add the FORWARDED flag */
1698 data[2] |= (unsigned char)SILC_PACKET_FLAG_FORWARDED;
1700 /* Put the data to the buffer */
1701 if (data && data_len)
1702 silc_buffer_put(sock->outbuf, data, data_len);
1704 /* Encrypt the packet */
1706 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1708 SILC_LOG_HEXDUMP(("Forwarded packet, len %d", sock->outbuf->len),
1709 sock->outbuf->data, sock->outbuf->len);
1711 /* Now actually send the packet */
1712 silc_server_packet_send_real(server, sock, force_send);
1715 /* Internal routine to actually create the channel packet and send it
1716 to network. This is common function in channel message sending. */
1719 silc_server_packet_send_to_channel_real(SilcServer server,
1720 SilcSocketConnection sock,
1721 SilcPacketContext *packet,
1724 unsigned char *data,
1725 unsigned int data_len,
1726 int channel_message,
1729 packet->truelen = data_len + SILC_PACKET_HEADER_LEN +
1730 packet->src_id_len + packet->dst_id_len;
1732 /* Prepare outgoing data buffer for packet sending */
1733 silc_packet_send_prepare(sock,
1734 SILC_PACKET_HEADER_LEN +
1735 packet->src_id_len +
1740 packet->buffer = sock->outbuf;
1742 /* Put the data to buffer, assemble and encrypt the packet. The packet
1743 is encrypted with normal session key shared with the client. */
1744 silc_buffer_put(sock->outbuf, data, data_len);
1745 silc_packet_assemble(packet);
1746 if (channel_message)
1747 silc_packet_encrypt(cipher, hmac, sock->outbuf, SILC_PACKET_HEADER_LEN +
1748 packet->src_id_len + packet->dst_id_len +
1751 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1753 SILC_LOG_HEXDUMP(("Channel packet, len %d", sock->outbuf->len),
1754 sock->outbuf->data, sock->outbuf->len);
1756 /* Now actually send the packet */
1757 silc_server_packet_send_real(server, sock, force_send);
1760 /* This routine is used by the server to send packets to channel. The
1761 packet sent with this function is distributed to all clients on
1762 the channel. Usually this is used to send notify messages to the
1763 channel, things like notify about new user joining to the channel. */
1765 void silc_server_packet_send_to_channel(SilcServer server,
1766 SilcChannelEntry channel,
1767 SilcPacketType type,
1768 unsigned char *data,
1769 unsigned int data_len,
1773 SilcSocketConnection sock = NULL;
1774 SilcPacketContext packetdata;
1775 SilcClientEntry client = NULL;
1776 SilcServerEntry *routed = NULL;
1777 unsigned int routed_count = 0;
1781 /* This doesn't send channel message packets */
1782 if (type == SILC_PACKET_CHANNEL_MESSAGE)
1785 SILC_LOG_DEBUG(("Sending packet to channel"));
1787 /* Set the packet context pointers. */
1788 packetdata.flags = 0;
1789 packetdata.type = type;
1790 packetdata.src_id = silc_id_id2str(server->id, SILC_ID_SERVER);
1791 packetdata.src_id_len = SILC_ID_SERVER_LEN;
1792 packetdata.src_id_type = SILC_ID_SERVER;
1793 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1794 packetdata.dst_id_len = SILC_ID_CHANNEL_LEN;
1795 packetdata.dst_id_type = SILC_ID_CHANNEL;
1796 packetdata.rng = server->rng;
1797 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1798 packetdata.src_id_len + packetdata.dst_id_len;
1799 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1801 /* If there are global users in the channel we will send the message
1802 first to our router for further routing. */
1803 if (server->server_type == SILC_SERVER && !server->standalone &&
1804 channel->global_users) {
1805 SilcServerEntry router;
1807 /* Get data used in packet header encryption, keys and stuff. */
1808 router = server->id_entry->router;
1809 sock = (SilcSocketConnection)router->connection;
1810 cipher = router->send_key;
1811 hmac = router->hmac;
1813 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
1815 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1817 data_len, FALSE, force_send);
1820 /* Send the message to clients on the channel's client list. */
1821 for (i = 0; i < channel->user_list_count; i++) {
1822 client = channel->user_list[i].client;
1824 /* If client has router set it is not locally connected client and
1825 we will route the message to the router set in the client. */
1826 if (client && client->router && server->server_type == SILC_ROUTER) {
1829 /* Check if we have sent the packet to this route already */
1830 for (k = 0; k < routed_count; k++)
1831 if (routed[k] == client->router)
1834 /* Get data used in packet header encryption, keys and stuff. */
1835 sock = (SilcSocketConnection)client->router->connection;
1836 cipher = client->router->send_key;
1837 hmac = client->router->hmac;
1839 /* Send the packet */
1840 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1842 data_len, FALSE, force_send);
1844 /* We want to make sure that the packet is routed to same router
1845 only once. Mark this route as sent route. */
1847 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
1848 routed[k] = client->router;
1854 /* Send to locally connected client */
1857 /* XXX Check client's mode on the channel. */
1859 /* Get data used in packet header encryption, keys and stuff. */
1860 sock = (SilcSocketConnection)client->connection;
1861 cipher = client->send_key;
1862 hmac = client->hmac;
1864 /* Send the packet */
1865 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1867 data_len, FALSE, force_send);
1873 silc_free(packetdata.src_id);
1874 silc_free(packetdata.dst_id);
1877 /* This routine is explicitly used to relay messages to some channel.
1878 Packets sent with this function we have received earlier and are
1879 totally encrypted. This just sends the packet to all clients on
1880 the channel. If the sender of the packet is someone on the channel
1881 the message will not be sent to that client. The SILC Packet header
1882 is encrypted with the session key shared between us and the client.
1883 MAC is also computed before encrypting the header. Rest of the
1884 packet will be untouched. */
1886 void silc_server_packet_relay_to_channel(SilcServer server,
1887 SilcSocketConnection sender_sock,
1888 SilcChannelEntry channel,
1890 SilcIdType sender_type,
1891 unsigned char *data,
1892 unsigned int data_len,
1895 int i, found = FALSE;
1896 SilcSocketConnection sock = NULL;
1897 SilcPacketContext packetdata;
1898 SilcClientEntry client = NULL;
1899 SilcServerEntry *routed = NULL;
1900 unsigned int routed_count = 0;
1904 SILC_LOG_DEBUG(("Relaying packet to channel"));
1906 /* Set the packet context pointers. */
1907 packetdata.flags = 0;
1908 packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
1909 packetdata.src_id = silc_id_id2str(sender, sender_type);
1910 packetdata.src_id_len = silc_id_get_len(sender_type);
1911 packetdata.src_id_type = sender_type;
1912 packetdata.dst_id = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
1913 packetdata.dst_id_len = SILC_ID_CHANNEL_LEN;
1914 packetdata.dst_id_type = SILC_ID_CHANNEL;
1915 packetdata.rng = server->rng;
1916 packetdata.padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
1917 packetdata.src_id_len +
1918 packetdata.dst_id_len));
1920 /* If there are global users in the channel we will send the message
1921 first to our router for further routing. */
1922 if (server->server_type == SILC_SERVER && !server->standalone &&
1923 channel->global_users) {
1924 SilcServerEntry router;
1926 router = server->id_entry->router;
1928 /* Check that the sender is not our router. */
1929 if (sender_sock != (SilcSocketConnection)router->connection) {
1931 /* Get data used in packet header encryption, keys and stuff. */
1932 sock = (SilcSocketConnection)router->connection;
1933 cipher = router->send_key;
1934 hmac = router->hmac;
1936 SILC_LOG_DEBUG(("Sending channel message to router for routing"));
1938 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1940 data_len, TRUE, force_send);
1944 /* Send the message to clients on the channel's client list. */
1945 for (i = 0; i < channel->user_list_count; i++) {
1946 client = channel->user_list[i].client;
1950 /* If sender is one on the channel do not send it the packet. */
1951 if (!found && !SILC_ID_CLIENT_COMPARE(client->id, sender)) {
1956 /* If the client has set router it means that it is not locally
1957 connected client and we will route the packet further. */
1958 if (server->server_type == SILC_ROUTER && client->router) {
1961 /* Sender maybe server as well so we want to make sure that
1962 we won't send the message to the server it came from. */
1963 if (!found && !SILC_ID_SERVER_COMPARE(client->router->id, sender)) {
1968 /* Check if we have sent the packet to this route already */
1969 for (k = 0; k < routed_count; k++)
1970 if (routed[k] == client->router)
1973 /* Get data used in packet header encryption, keys and stuff. */
1974 sock = (SilcSocketConnection)client->router->connection;
1975 cipher = client->router->send_key;
1976 hmac = client->router->hmac;
1978 /* Send the packet */
1979 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
1981 data_len, TRUE, force_send);
1983 /* We want to make sure that the packet is routed to same router
1984 only once. Mark this route as sent route. */
1986 routed = silc_realloc(routed, sizeof(*routed) * (k + 1));
1987 routed[k] = client->router;
1993 /* XXX Check client's mode on the channel. */
1995 /* Get data used in packet header encryption, keys and stuff. */
1996 sock = (SilcSocketConnection)client->connection;
1997 cipher = client->send_key;
1998 hmac = client->hmac;
2000 SILC_LOG_DEBUG(("Sending packet to client %s",
2001 sock->hostname ? sock->hostname : sock->ip));
2003 /* Send the packet */
2004 silc_server_packet_send_to_channel_real(server, sock, &packetdata,
2006 data_len, TRUE, force_send);
2010 silc_free(packetdata.src_id);
2011 silc_free(packetdata.dst_id);
2014 /* This function is used to send packets strictly to all local clients
2015 on a particular channel. This is used for example to distribute new
2016 channel key to all our locally connected clients on the channel.
2017 The packets are always encrypted with the session key shared between
2020 void silc_server_packet_send_local_channel(SilcServer server,
2021 SilcChannelEntry channel,
2022 SilcPacketType type,
2023 SilcPacketFlags flags,
2024 unsigned char *data,
2025 unsigned int data_len,
2029 SilcClientEntry client;
2030 SilcSocketConnection sock = NULL;
2032 SILC_LOG_DEBUG(("Start"));
2034 /* Send the message to clients on the channel's client list. */
2035 for (i = 0; i < channel->user_list_count; i++) {
2036 client = channel->user_list[i].client;
2039 sock = (SilcSocketConnection)client->connection;
2041 /* Send the packet to the client */
2042 silc_server_packet_send_dest(server, sock, type, flags, client->id,
2043 SILC_ID_CLIENT, data, data_len,
2049 /* Relays received command reply packet to the correct destination. The
2050 destination must be one of our locally connected client or the packet
2051 will be ignored. This is called when server has forwarded one of
2052 client's command request to router and router has now replied to the
2055 void silc_server_packet_relay_command_reply(SilcServer server,
2056 SilcSocketConnection sock,
2057 SilcPacketContext *packet)
2059 SilcBuffer buffer = packet->buffer;
2060 SilcClientEntry client;
2062 SilcSocketConnection dst_sock;
2064 SILC_LOG_DEBUG(("Start"));
2066 /* Source must be server or router */
2067 if (packet->src_id_type != SILC_ID_SERVER &&
2068 sock->type != SILC_SOCKET_TYPE_ROUTER)
2071 /* Destination must be client */
2072 if (packet->dst_id_type != SILC_ID_CLIENT)
2075 /* Execute command reply locally for the command */
2076 silc_server_command_reply_process(server, sock, buffer);
2078 id = silc_id_str2id(packet->dst_id, SILC_ID_CLIENT);
2080 /* Destination must be one of ours */
2081 client = silc_idlist_find_client_by_id(server->local_list, id);
2087 /* Relay the packet to the client */
2089 dst_sock = (SilcSocketConnection)client->connection;
2090 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
2091 + packet->dst_id_len + packet->padlen);
2093 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
2094 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
2096 /* Encrypt packet */
2097 if (client && client->send_key)
2098 silc_packet_encrypt(client->send_key, client->hmac,
2099 dst_sock->outbuf, buffer->len);
2101 /* Send the packet */
2102 silc_server_packet_send_real(server, dst_sock, FALSE);
2107 silc_buffer_free(buffer);
2110 /* Closes connection to socket connection */
2112 void silc_server_close_connection(SilcServer server,
2113 SilcSocketConnection sock)
2116 SILC_LOG_DEBUG(("Closing connection %d", sock->sock));
2118 /* We won't listen for this connection anymore */
2119 silc_schedule_unset_listen_fd(sock->sock);
2121 /* Unregister all tasks */
2122 silc_task_unregister_by_fd(server->io_queue, sock->sock);
2123 silc_task_unregister_by_fd(server->timeout_queue, sock->sock);
2125 /* Close the actual connection */
2126 silc_net_close_connection(sock->sock);
2127 server->sockets[sock->sock] = NULL;
2128 silc_socket_free(sock);
2131 /* Sends disconnect message to remote connection and disconnects the
2134 void silc_server_disconnect_remote(SilcServer server,
2135 SilcSocketConnection sock,
2136 const char *fmt, ...)
2139 unsigned char buf[4096];
2141 memset(buf, 0, sizeof(buf));
2143 vsprintf(buf, fmt, ap);
2146 SILC_LOG_DEBUG(("Disconnecting remote host"));
2148 /* Notify remote end that the conversation is over. The notify message
2149 is tried to be sent immediately. */
2150 silc_server_packet_send(server, sock, SILC_PACKET_DISCONNECT, 0,
2151 buf, strlen(buf), TRUE);
2153 /* Mark the connection to be disconnected */
2154 SILC_SET_DISCONNECTED(sock);
2155 silc_server_close_connection(server, sock);
2158 /* Free's user_data pointer from socket connection object. As this
2159 pointer maybe anything we wil switch here to find the correct
2160 data type and free it the way it needs to be free'd. */
2162 void silc_server_free_sock_user_data(SilcServer server,
2163 SilcSocketConnection sock)
2165 SILC_LOG_DEBUG(("Start"));
2167 switch(sock->type) {
2168 case SILC_SOCKET_TYPE_CLIENT:
2170 SilcClientEntry user_data = (SilcClientEntry )sock->user_data;
2172 /* Remove client from all channels */
2173 silc_server_remove_from_channels(server, sock, user_data);
2175 /* Free the client entry and everything in it */
2176 /* XXX must take some info to history before freeing */
2177 silc_idlist_del_client(server->local_list, user_data);
2180 case SILC_SOCKET_TYPE_SERVER:
2181 case SILC_SOCKET_TYPE_ROUTER:
2189 SilcUnknownEntry user_data = (SilcUnknownEntry)sock->user_data;
2191 if (user_data->send_key)
2192 silc_cipher_free(user_data->send_key);
2193 if (user_data->receive_key)
2194 silc_cipher_free(user_data->receive_key);
2195 if (user_data->pkcs)
2196 silc_pkcs_free(user_data->pkcs);
2197 if (user_data->hmac) {
2198 silc_hmac_free(user_data->hmac);
2199 memset(user_data->hmac_key, 0, user_data->hmac_key_len);
2200 silc_free(user_data->hmac_key);
2202 silc_free(user_data);
2207 sock->user_data = NULL;
2212 /* Removes client from all channels it has joined. This is used when
2213 client connection is disconnected. If the client on a channel
2214 is last, the channel is removed as well. */
2216 void silc_server_remove_from_channels(SilcServer server,
2217 SilcSocketConnection sock,
2218 SilcClientEntry client)
2221 SilcChannelEntry channel;
2223 /* Remove the client from all channels. The client is removed from
2224 the channels' user list. */
2225 for (i = 0; i < client->channel_count; i++) {
2226 channel = client->channel[i];
2230 /* Remove from channel */
2231 for (k = 0; k < channel->user_list_count; k++) {
2232 if (channel->user_list[k].client == client) {
2234 /* If this client is last one on the channel the channel
2235 is removed all together. */
2236 if (channel->user_list_count == 1) {
2238 /* However, if the channel has marked global users then the
2239 channel is not created locally, and this does not remove the
2240 channel globally from SILC network, in this case we will
2241 notify that this client has left the channel. */
2242 if (channel->global_users)
2243 silc_server_send_notify_to_channel(server, channel,
2244 SILC_NOTIFY_TYPE_SIGNOFF,
2248 sock->hostname : sock->ip);
2250 silc_idlist_del_channel(server->local_list, channel);
2254 channel->user_list[k].client = NULL;
2255 channel->user_list[k].mode = SILC_CHANNEL_UMODE_NONE;
2257 /* Send notify to channel about client leaving SILC and thus
2258 the entire channel. */
2259 silc_server_send_notify_to_channel(server, channel,
2260 SILC_NOTIFY_TYPE_SIGNOFF,
2264 sock->hostname : sock->ip);
2269 if (client->channel_count)
2270 silc_free(client->channel);
2271 client->channel = NULL;
2274 /* Removes client from one channel. This is used for example when client
2275 calls LEAVE command to remove itself from the channel. Returns TRUE
2276 if channel still exists and FALSE if the channel is removed when
2277 last client leaves the channel. If `notify' is FALSE notify messages
2280 int silc_server_remove_from_one_channel(SilcServer server,
2281 SilcSocketConnection sock,
2282 SilcChannelEntry channel,
2283 SilcClientEntry client,
2287 SilcChannelEntry ch;
2289 /* Remove the client from the channel. The client is removed from
2290 the channel's user list. */
2291 for (i = 0; i < client->channel_count; i++) {
2292 ch = client->channel[i];
2293 if (!ch || ch != channel)
2297 client->channel[i] = NULL;
2299 /* Remove from channel */
2300 for (k = 0; k < channel->user_list_count; k++) {
2301 if (channel->user_list[k].client == client) {
2303 /* If this client is last one on the channel the channel
2304 is removed all together. */
2305 if (channel->user_list_count == 1) {
2306 /* Notify about leaving client if this channel has global users,
2307 ie. the channel is not created locally. */
2308 if (notify && channel->global_users)
2309 silc_server_send_notify_to_channel(server, channel,
2310 SILC_NOTIFY_TYPE_LEAVE,
2311 "%s@%s has left channel %s",
2314 sock->hostname : sock->ip,
2315 channel->channel_name);
2317 silc_idlist_del_channel(server->local_list, channel);
2321 channel->user_list[k].client = NULL;
2322 channel->user_list[k].mode = SILC_CHANNEL_UMODE_NONE;
2324 /* Send notify to channel about client leaving the channel */
2326 silc_server_send_notify_to_channel(server, channel,
2327 SILC_NOTIFY_TYPE_LEAVE,
2328 "%s@%s has left channel %s",
2329 client->nickname, sock->hostname ?
2330 sock->hostname : sock->ip,
2331 channel->channel_name);
2339 /* Returns TRUE if the given client is on the channel. FALSE if not.
2340 This works because we assure that the user list on the channel is
2341 always in up to date thus we can only check the channel list from
2342 `client' which is faster than checking the user list from `channel'. */
2343 /* XXX This really is utility function and should be in eg. serverutil.c */
2345 int silc_server_client_on_channel(SilcClientEntry client,
2346 SilcChannelEntry channel)
2350 if (!client || !channel)
2353 for (i = 0; i < client->channel_count; i++) {
2354 if (client->channel[i] == channel)
2361 /* Timeout callback. This is called if connection is idle or for some
2362 other reason is not responding within some period of time. This
2363 disconnects the remote end. */
2365 SILC_TASK_CALLBACK(silc_server_timeout_remote)
2367 SilcServer server = (SilcServer)context;
2368 SilcSocketConnection sock = server->sockets[fd];
2370 silc_server_disconnect_remote(server, sock,
2371 "Server closed connection: "
2372 "Connection timeout");
2375 /* Internal routine used to send (relay, route) private messages to some
2376 destination. If the private message key does not exist then the message
2377 is re-encrypted, otherwise we just pass it along. */
2380 silc_server_private_message_send_internal(SilcServer server,
2381 SilcSocketConnection dst_sock,
2384 SilcPacketContext *packet)
2386 SilcBuffer buffer = packet->buffer;
2388 /* Send and re-encrypt if private messge key does not exist */
2389 if ((packet->flags & SILC_PACKET_FLAG_PRIVMSG_KEY) == FALSE) {
2391 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
2392 + packet->dst_id_len + packet->padlen);
2393 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
2394 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
2396 /* Re-encrypt packet */
2397 silc_packet_encrypt(cipher, hmac, dst_sock->outbuf, buffer->len);
2399 /* Send the packet */
2400 silc_server_packet_send_real(server, dst_sock, FALSE);
2403 /* Key exist so just send it */
2404 silc_buffer_push(buffer, SILC_PACKET_HEADER_LEN + packet->src_id_len
2405 + packet->dst_id_len + packet->padlen);
2406 silc_packet_send_prepare(dst_sock, 0, 0, buffer->len);
2407 silc_buffer_put(dst_sock->outbuf, buffer->data, buffer->len);
2408 silc_server_packet_send_real(server, dst_sock, FALSE);
2412 /* Received private message. This resolves the destination of the message
2413 and sends the packet. This is used by both server and router. If the
2414 destination is our locally connected client this sends the packet to
2415 the client. This may also send the message for further routing if
2416 the destination is not in our server (or router). */
2418 void silc_server_private_message(SilcServer server,
2419 SilcSocketConnection sock,
2420 SilcPacketContext *packet)
2422 SilcBuffer buffer = packet->buffer;
2424 SilcServerEntry router;
2425 SilcSocketConnection dst_sock;
2426 SilcClientEntry client;
2428 SILC_LOG_DEBUG(("Start"));
2430 if (!packet->dst_id) {
2431 SILC_LOG_ERROR(("Bad Client ID in private message packet, dropped"));
2435 /* Decode destination Client ID */
2436 id = silc_id_str2id(packet->dst_id, SILC_ID_CLIENT);
2438 SILC_LOG_ERROR(("Could not decode destination Client ID, dropped"));
2442 /* If the destination belongs to our server we don't have to route
2443 the message anywhere but to send it to the local destination. */
2444 client = silc_idlist_find_client_by_id(server->local_list, id);
2446 /* It exists, now deliver the message to the destination */
2447 dst_sock = (SilcSocketConnection)client->connection;
2449 /* If we are router and the client has router then the client is in
2450 our cell but not directly connected to us. */
2451 if (server->server_type == SILC_ROUTER && client->router) {
2452 /* We are of course in this case the client's router thus the real
2453 "router" of the client is the server who owns the client. Thus
2454 we will send the packet to that server. */
2455 router = (SilcServerEntry)dst_sock->user_data;
2456 // assert(client->router == server->id_entry);
2458 silc_server_private_message_send_internal(server, dst_sock,
2465 /* Seems that client really is directly connected to us */
2466 silc_server_private_message_send_internal(server, dst_sock,
2468 client->hmac, packet);
2472 /* Destination belongs to someone not in this server. If we are normal
2473 server our action is to send the packet to our router. */
2474 if (server->server_type == SILC_SERVER && !server->standalone) {
2475 router = server->id_entry->router;
2477 /* Send to primary route */
2479 dst_sock = (SilcSocketConnection)router->connection;
2480 silc_server_private_message_send_internal(server, dst_sock,
2482 router->hmac, packet);
2487 /* We are router and we will perform route lookup for the destination
2488 and send the message to fastest route. */
2489 if (server->server_type == SILC_ROUTER && !server->standalone) {
2490 dst_sock = silc_server_get_route(server, id, SILC_ID_CLIENT);
2491 router = (SilcServerEntry)dst_sock->user_data;
2493 /* Get fastest route and send packet. */
2495 silc_server_private_message_send_internal(server, dst_sock,
2497 router->hmac, packet);
2503 silc_server_send_error(server, sock,
2504 "No such nickname: Private message not sent");
2506 silc_buffer_free(buffer);
2509 /* Process received channel message. The message can be originated from
2510 client or server. */
2512 void silc_server_channel_message(SilcServer server,
2513 SilcSocketConnection sock,
2514 SilcPacketContext *packet)
2516 SilcChannelEntry channel = NULL;
2517 SilcClientEntry client = NULL;
2518 SilcChannelID *id = NULL;
2519 void *sender = NULL;
2520 SilcBuffer buffer = packet->buffer;
2523 SILC_LOG_DEBUG(("Processing channel message"));
2526 if (packet->dst_id_type != SILC_ID_CHANNEL) {
2527 SILC_LOG_ERROR(("Received bad message for channel, dropped"));
2528 SILC_LOG_DEBUG(("Received bad message for channel, dropped"));
2532 /* Find channel entry */
2533 id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
2534 channel = silc_idlist_find_channel_by_id(server->local_list, id);
2536 SILC_LOG_DEBUG(("Could not find channel"));
2540 /* See that this client is on the channel. If the message is coming
2541 from router we won't do the check as the message is from client that
2542 we don't know about. Also, if the original sender is not client
2543 (as it can be server as well) we don't do the check. */
2544 sender = silc_id_str2id(packet->src_id, packet->src_id_type);
2545 if (sock->type != SILC_SOCKET_TYPE_ROUTER &&
2546 packet->src_id_type == SILC_ID_CLIENT) {
2547 for (i = 0; i < channel->user_list_count; i++) {
2548 client = channel->user_list[i].client;
2549 if (client && !SILC_ID_CLIENT_COMPARE(client->id, sender))
2552 if (i >= channel->user_list_count)
2556 /* Distribute the packet to our local clients. This will send the
2557 packet for further routing as well, if needed. */
2558 silc_server_packet_relay_to_channel(server, sock, channel, sender,
2559 packet->src_id_type,
2560 packet->buffer->data,
2561 packet->buffer->len, FALSE);
2568 silc_buffer_free(buffer);
2571 /* Received channel key packet. We distribute the key to all of our locally
2572 connected clients on the channel. */
2573 /* XXX Router must accept this packet and distribute the key to all its
2574 server that has clients on the channel */
2576 void silc_server_channel_key(SilcServer server,
2577 SilcSocketConnection sock,
2578 SilcPacketContext *packet)
2580 SilcBuffer buffer = packet->buffer;
2581 SilcChannelKeyPayload payload = NULL;
2582 SilcChannelID *id = NULL;
2583 SilcChannelEntry channel;
2584 SilcClientEntry client;
2586 unsigned int key_len;
2590 if (packet->src_id_type != SILC_ID_SERVER &&
2591 sock->type != SILC_SOCKET_TYPE_ROUTER)
2594 /* Decode channel key payload */
2595 payload = silc_channel_key_parse_payload(buffer);
2597 SILC_LOG_ERROR(("Bad channel key payload, dropped"));
2601 /* Get channel ID */
2602 id = silc_id_str2id(silc_channel_key_get_id(payload, NULL), SILC_ID_CHANNEL);
2606 /* Get the channel entry */
2607 channel = silc_idlist_find_channel_by_id(server->local_list, id);
2609 SILC_LOG_ERROR(("Received key for non-existent channel"));
2613 /* Save the key for us as well */
2614 key = silc_channel_key_get_key(payload, &key_len);
2617 cipher = silc_channel_key_get_cipher(payload, NULL);;
2620 channel->key_len = key_len * 8;
2621 channel->key = silc_calloc(key_len, sizeof(unsigned char));
2622 memcpy(channel->key, key, key_len);
2623 silc_cipher_alloc(cipher, &channel->channel_key);
2624 channel->channel_key->cipher->set_key(channel->channel_key->context,
2627 /* Distribute the key to all clients on the channel */
2628 for (i = 0; i < channel->user_list_count; i++) {
2629 client = channel->user_list[i].client;
2632 silc_server_packet_send_dest(server, client->connection,
2633 SILC_PACKET_CHANNEL_KEY, 0,
2634 client->id, SILC_ID_CLIENT,
2635 buffer->data, buffer->len, FALSE);
2642 silc_channel_key_free_payload(payload);
2643 silc_buffer_free(buffer);
2646 /* Sends current motd to client */
2648 void silc_server_send_motd(SilcServer server,
2649 SilcSocketConnection sock)
2655 if (server->config && server->config->motd &&
2656 server->config->motd->motd_file) {
2658 motd = silc_file_read(server->config->motd->motd_file, &motd_len);
2666 if (cp[i++] == '\n') {
2667 memset(line, 0, sizeof(line));
2668 strncat(line, cp, i - 1);
2674 silc_server_send_notify(server, sock, SILC_NOTIFY_TYPE_NONE, line);
2686 /* Sends error message. Error messages may or may not have any
2689 void silc_server_send_error(SilcServer server,
2690 SilcSocketConnection sock,
2691 const char *fmt, ...)
2694 unsigned char buf[4096];
2696 memset(buf, 0, sizeof(buf));
2698 vsprintf(buf, fmt, ap);
2701 silc_server_packet_send(server, sock, SILC_PACKET_ERROR, 0,
2702 buf, strlen(buf), FALSE);
2705 /* Sends notify message */
2707 void silc_server_send_notify(SilcServer server,
2708 SilcSocketConnection sock,
2709 SilcNotifyType type,
2710 const char *fmt, ...)
2713 unsigned char buf[4096];
2716 memset(buf, 0, sizeof(buf));
2718 vsprintf(buf, fmt, ap);
2721 packet = silc_buffer_alloc(2 + strlen(buf));
2722 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2723 silc_buffer_format(packet,
2724 SILC_STR_UI_SHORT(type),
2725 SILC_STR_UI16_STRING(buf),
2728 silc_server_packet_send(server, sock, SILC_PACKET_NOTIFY, 0,
2729 packet->data, packet->len, FALSE);
2730 silc_buffer_free(packet);
2733 /* Sends notify message destined to specific entity. */
2735 void silc_server_send_notify_dest(SilcServer server,
2736 SilcSocketConnection sock,
2738 SilcIdType dest_id_type,
2739 SilcNotifyType type,
2740 const char *fmt, ...)
2743 unsigned char buf[4096];
2746 memset(buf, 0, sizeof(buf));
2748 vsprintf(buf, fmt, ap);
2751 packet = silc_buffer_alloc(2 + strlen(buf));
2752 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2753 silc_buffer_format(packet,
2754 SILC_STR_UI_SHORT(type),
2755 SILC_STR_UI16_STRING(buf),
2758 silc_server_packet_send_dest(server, sock, SILC_PACKET_NOTIFY, 0,
2759 dest_id, dest_id_type,
2760 packet->data, packet->len, FALSE);
2761 silc_buffer_free(packet);
2764 /* Sends notify message to a channel. The notify message sent is
2765 distributed to all clients on the channel. */
2767 void silc_server_send_notify_to_channel(SilcServer server,
2768 SilcChannelEntry channel,
2769 SilcNotifyType type,
2770 const char *fmt, ...)
2773 unsigned char buf[4096];
2776 memset(buf, 0, sizeof(buf));
2778 vsprintf(buf, fmt, ap);
2781 packet = silc_buffer_alloc(2 + strlen(buf));
2782 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2783 silc_buffer_format(packet,
2784 SILC_STR_UI_SHORT(type),
2785 SILC_STR_UI16_STRING(buf),
2788 silc_server_packet_send_to_channel(server, channel,
2790 packet->data, packet->len, FALSE);
2791 silc_buffer_free(packet);
2794 /* Sends New ID Payload to remote end. The packet is used to distribute
2795 information about new registered clients, servers, channel etc. usually
2796 to routers so that they can keep these information up to date.
2797 If the argument `broadcast' is TRUE then the packet is sent as
2798 broadcast packet. */
2800 void silc_server_send_new_id(SilcServer server,
2801 SilcSocketConnection sock,
2803 void *id, SilcIdType id_type,
2804 unsigned int id_len)
2807 unsigned char *id_string;
2809 id_string = silc_id_id2str(id, id_type);
2813 packet = silc_buffer_alloc(2 + 2 + id_len);
2814 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2815 silc_buffer_format(packet,
2816 SILC_STR_UI_SHORT(id_type),
2817 SILC_STR_UI_SHORT(id_len),
2818 SILC_STR_UI_XNSTRING(id_string, id_len),
2821 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID,
2822 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
2823 packet->data, packet->len, FALSE);
2824 silc_free(id_string);
2825 silc_buffer_free(packet);
2828 /* Sends Replace ID payload to remote end. This is used to replace old
2829 ID with new ID sent in the packet. This is called for example when
2830 user changes nickname and we create new ID for the user. If the
2831 argument `broadcast' is TRUE then the packet is sent as
2832 broadcast packet. */
2833 /* XXX It would be expected that the new id is same type as the old
2836 void silc_server_send_replace_id(SilcServer server,
2837 SilcSocketConnection sock,
2839 void *old_id, SilcIdType old_id_type,
2840 unsigned int old_id_len,
2841 void *new_id, SilcIdType new_id_type,
2842 unsigned int new_id_len)
2848 oid = silc_id_id2str(old_id, old_id_type);
2852 nid = silc_id_id2str(new_id, new_id_type);
2856 packet = silc_buffer_alloc(2 + 2 + 2 + 2 + old_id_len + new_id_len);
2857 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2858 silc_buffer_format(packet,
2859 SILC_STR_UI_SHORT(old_id_type),
2860 SILC_STR_UI_SHORT(old_id_len),
2861 SILC_STR_UI_XNSTRING(oid, old_id_len),
2862 SILC_STR_UI_SHORT(new_id_type),
2863 SILC_STR_UI_SHORT(new_id_len),
2864 SILC_STR_UI_XNSTRING(nid, new_id_len),
2867 silc_server_packet_send(server, sock, SILC_PACKET_REPLACE_ID,
2868 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
2869 packet->data, packet->len, FALSE);
2872 silc_buffer_free(packet);
2875 /* This function is used to send Remove Channel User payload. This may sent
2876 by server but is usually used only by router to notify other routers that
2877 user has left a channel. Normal server sends this packet to its router
2878 to notify that the router should not hold a record about this client
2879 on a channel anymore. Router distributes it further to other routers. */
2881 void silc_server_send_remove_channel_user(SilcServer server,
2882 SilcSocketConnection sock,
2884 void *client_id, void *channel_id)
2887 unsigned char *clid, *chid;
2889 clid = silc_id_id2str(client_id, SILC_ID_CLIENT);
2893 chid = silc_id_id2str(channel_id, SILC_ID_CHANNEL);
2897 packet = silc_buffer_alloc(2 + 2 + SILC_ID_CLIENT_LEN + SILC_ID_CHANNEL_LEN);
2898 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
2899 silc_buffer_format(packet,
2900 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
2901 SILC_STR_UI_XNSTRING(clid, SILC_ID_CLIENT_LEN),
2902 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
2903 SILC_STR_UI_XNSTRING(chid, SILC_ID_CHANNEL_LEN),
2906 silc_server_packet_send(server, sock, SILC_PACKET_REMOVE_CHANNEL_USER,
2907 broadcast ? SILC_PACKET_FLAG_BROADCAST : 0,
2908 packet->data, packet->len, FALSE);
2911 silc_buffer_free(packet);
2914 /* Received packet to replace a ID. This checks that the requested ID
2915 exists and replaces it with the new one. */
2917 void silc_server_replace_id(SilcServer server,
2918 SilcSocketConnection sock,
2919 SilcPacketContext *packet)
2921 SilcBuffer buffer = packet->buffer;
2922 unsigned char *old_id = NULL, *new_id = NULL;
2923 SilcIdType old_id_type, new_id_type;
2924 unsigned short old_id_len, new_id_len;
2925 void *id = NULL, *id2 = NULL;
2927 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
2928 packet->src_id_type == SILC_ID_CLIENT)
2931 SILC_LOG_DEBUG(("Replacing ID"));
2933 silc_buffer_unformat(buffer,
2934 SILC_STR_UI_SHORT(&old_id_type),
2935 SILC_STR_UI16_NSTRING_ALLOC(&old_id, &old_id_len),
2936 SILC_STR_UI_SHORT(&new_id_type),
2937 SILC_STR_UI16_NSTRING_ALLOC(&new_id, &new_id_len),
2940 if (old_id_type != new_id_type)
2943 if (old_id_len != silc_id_get_len(old_id_type) ||
2944 new_id_len != silc_id_get_len(new_id_type))
2947 id = silc_id_str2id(old_id, old_id_type);
2951 id2 = silc_id_str2id(new_id, new_id_type);
2955 /* Replace the old ID */
2956 switch(old_id_type) {
2957 case SILC_ID_CLIENT:
2958 if (silc_idlist_replace_client_id(server->local_list, id, id2) == NULL)
2959 if (server->server_type == SILC_ROUTER)
2960 silc_idlist_replace_client_id(server->global_list, id, id2);
2963 case SILC_ID_SERVER:
2964 if (silc_idlist_replace_server_id(server->local_list, id, id2) == NULL)
2965 if (server->server_type == SILC_ROUTER)
2966 silc_idlist_replace_server_id(server->global_list, id, id2);
2969 case SILC_ID_CHANNEL:
2970 /* XXX Hmm... Basically this cannot occur. Channel ID's cannot be
2989 /* Creates new channel. */
2991 SilcChannelEntry silc_server_new_channel(SilcServer server,
2992 SilcServerID *router_id,
2993 char *cipher, char *channel_name)
2995 int i, channel_len, key_len;
2996 SilcChannelID *channel_id;
2997 SilcChannelEntry entry;
2999 unsigned char channel_key[32], *id_string;
3002 SILC_LOG_DEBUG(("Creating new channel"));
3004 /* Create channel key */
3005 for (i = 0; i < 32; i++)
3006 channel_key[i] = silc_rng_get_byte(server->rng);
3013 silc_cipher_alloc(cipher, &key);
3014 key->cipher->set_key(key->context, channel_key, key_len);
3016 /* Create the channel */
3017 silc_id_create_channel_id(router_id, server->rng, &channel_id);
3018 entry = silc_idlist_add_channel(server->local_list, channel_name,
3019 SILC_CHANNEL_MODE_NONE, channel_id,
3025 silc_idcache_add(server->local_list->channels, channel_name,
3026 SILC_ID_CHANNEL, channel_id, (void *)entry, TRUE);
3028 entry->key = silc_calloc(key_len, sizeof(*entry->key));
3029 entry->key_len = key_len * 8;
3030 memcpy(entry->key, channel_key, key_len);
3031 memset(channel_key, 0, sizeof(channel_key));
3033 /* Notify other routers about the new channel. We send the packet
3034 to our primary route. */
3035 if (server->standalone == FALSE) {
3036 channel_len = strlen(channel_name);
3037 id_string = silc_id_id2str(entry->id, SILC_ID_CHANNEL);
3038 packet = silc_buffer_alloc(2 + SILC_ID_CHANNEL_LEN);
3040 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
3041 silc_buffer_format(packet,
3042 SILC_STR_UI_SHORT(channel_len),
3043 SILC_STR_UI_XNSTRING(channel_name, channel_len),
3044 SILC_STR_UI_SHORT(SILC_ID_CHANNEL_LEN),
3045 SILC_STR_UI_XNSTRING(id_string, SILC_ID_CHANNEL_LEN),
3048 /* Send the packet to our router. */
3049 silc_server_packet_send(server, (SilcSocketConnection)
3050 server->id_entry->router->connection,
3051 SILC_PACKET_NEW_CHANNEL_USER, 0,
3052 packet->data, packet->len, TRUE);
3054 silc_free(id_string);
3055 silc_buffer_free(packet);
3061 /* Create new client. This processes incoming NEW_CLIENT packet and creates
3062 Client ID for the client. Client becomes registered after calling this
3065 SilcClientEntry silc_server_new_client(SilcServer server,
3066 SilcSocketConnection sock,
3067 SilcPacketContext *packet)
3069 SilcBuffer buffer = packet->buffer;
3070 SilcClientEntry client;
3071 SilcIDCacheEntry cache;
3072 SilcClientID *client_id;
3074 char *username = NULL, *realname = NULL, *id_string;
3076 SILC_LOG_DEBUG(("Creating new client"));
3078 if (sock->type != SILC_SOCKET_TYPE_CLIENT)
3081 /* Take client entry */
3082 client = (SilcClientEntry)sock->user_data;
3084 /* Fetch the old client cache entry so that we can update it. */
3085 if (!silc_idcache_find_by_context(server->local_list->clients,
3086 sock->user_data, &cache)) {
3087 SILC_LOG_ERROR(("Lost client's cache entry - bad thing"));
3091 /* Parse incoming packet */
3092 silc_buffer_unformat(buffer,
3093 SILC_STR_UI16_STRING_ALLOC(&username),
3094 SILC_STR_UI16_STRING_ALLOC(&realname),
3097 /* Create Client ID */
3098 silc_id_create_client_id(server->id, server->rng, server->md5hash,
3099 username, &client_id);
3101 /* Update client entry */
3102 client->registered = TRUE;
3103 client->nickname = strdup(username);
3104 client->username = username;
3105 client->userinfo = realname;
3106 client->id = client_id;
3108 /* Update the cache entry */
3109 cache->id = (void *)client_id;
3110 cache->type = SILC_ID_CLIENT;
3111 cache->data = username;
3112 silc_idcache_sort_by_data(server->local_list->clients);
3114 /* Notify our router about new client on the SILC network */
3115 if (!server->standalone)
3116 silc_server_send_new_id(server, (SilcSocketConnection)
3117 server->id_entry->router->connection,
3118 server->server_type == SILC_SERVER ? TRUE : FALSE,
3119 client->id, SILC_ID_CLIENT, SILC_ID_CLIENT_LEN);
3121 /* Send the new client ID to the client. */
3122 id_string = silc_id_id2str(client->id, SILC_ID_CLIENT);
3123 reply = silc_buffer_alloc(2 + 2 + SILC_ID_CLIENT_LEN);
3124 silc_buffer_pull_tail(reply, SILC_BUFFER_END(reply));
3125 silc_buffer_format(reply,
3126 SILC_STR_UI_SHORT(SILC_ID_CLIENT),
3127 SILC_STR_UI_SHORT(SILC_ID_CLIENT_LEN),
3128 SILC_STR_UI_XNSTRING(id_string, SILC_ID_CLIENT_LEN),
3130 silc_server_packet_send(server, sock, SILC_PACKET_NEW_ID, 0,
3131 reply->data, reply->len, FALSE);
3132 silc_free(id_string);
3133 silc_buffer_free(reply);
3135 /* Send some nice info to the client */
3136 silc_server_send_notify(server, sock,
3137 SILC_NOTIFY_TYPE_NONE,
3138 "Welcome to the SILC Network %s@%s",
3140 sock->hostname ? sock->hostname : sock->ip);
3141 silc_server_send_notify(server, sock,
3142 SILC_NOTIFY_TYPE_NONE,
3143 "Your host is %s, running version %s",
3144 server->config->server_info->server_name,
3146 silc_server_send_notify(server, sock,
3147 SILC_NOTIFY_TYPE_NONE,
3148 "Your connection is secured with %s cipher, "
3149 "key length %d bits",
3150 client->send_key->cipher->name,
3151 client->send_key->cipher->key_len);
3152 silc_server_send_notify(server, sock,
3153 SILC_NOTIFY_TYPE_NONE,
3154 "Your current nickname is %s",
3158 silc_server_send_motd(server, sock);
3163 /* Create new server. This processes incoming NEW_SERVER packet and
3164 saves the received Server ID. The server is our locally connected
3165 server thus we save all the information and save it to local list.
3166 This funtion can be used by both normal server and router server.
3167 If normal server uses this it means that its router has connected
3168 to the server. If router uses this it means that one of the cell's
3169 servers is connected to the router. */
3171 SilcServerEntry silc_server_new_server(SilcServer server,
3172 SilcSocketConnection sock,
3173 SilcPacketContext *packet)
3175 SilcBuffer buffer = packet->buffer;
3176 SilcServerEntry new_server;
3177 SilcIDCacheEntry cache;
3178 SilcServerID *server_id;
3179 unsigned char *server_name, *id_string;
3181 SILC_LOG_DEBUG(("Creating new server"));
3183 if (sock->type != SILC_SOCKET_TYPE_SERVER &&
3184 sock->type != SILC_SOCKET_TYPE_ROUTER)
3187 /* Take server entry */
3188 new_server = (SilcServerEntry)sock->user_data;
3190 /* Fetch the old server cache entry so that we can update it. */
3191 if (!silc_idcache_find_by_context(server->local_list->servers,
3192 sock->user_data, &cache)) {
3193 SILC_LOG_ERROR(("Lost server's cache entry - bad thing"));
3197 /* Parse the incoming packet */
3198 silc_buffer_unformat(buffer,
3199 SILC_STR_UI16_STRING_ALLOC(&id_string),
3200 SILC_STR_UI16_STRING_ALLOC(&server_name),
3204 server_id = silc_id_str2id(id_string, SILC_ID_SERVER);
3205 silc_free(id_string);
3207 /* Update client entry */
3208 new_server->registered = TRUE;
3209 new_server->server_name = server_name;
3210 new_server->id = server_id;
3212 /* Update the cache entry */
3213 cache->id = (void *)server_id;
3214 cache->type = SILC_ID_SERVER;
3215 cache->data = server_name;
3216 silc_idcache_sort_by_data(server->local_list->servers);
3218 /* Distribute the information about new server in the SILC network
3219 to our router. If we are normal server we won't send anything
3220 since this connection must be our router connection. */
3221 if (server->server_type == SILC_ROUTER && !server->standalone)
3222 silc_server_send_new_id(server, server->id_entry->router->connection,
3223 TRUE, new_server->id, SILC_ID_SERVER,
3224 SILC_ID_SERVER_LEN);
3229 /* Processes incoming New ID Payload. New ID Payload is used to distribute
3230 information about newly registered clients, servers and created
3233 void silc_server_new_id(SilcServer server, SilcSocketConnection sock,
3234 SilcPacketContext *packet)
3236 SilcBuffer buffer = packet->buffer;
3238 SilcServerEntry tmpserver, router;
3239 SilcSocketConnection router_sock;
3241 unsigned char *id_string;
3244 SILC_LOG_DEBUG(("Processing new ID"));
3246 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
3247 server->server_type == SILC_SERVER ||
3248 packet->src_id_type != SILC_ID_SERVER)
3251 silc_buffer_unformat(buffer,
3252 SILC_STR_UI_SHORT(&id_type),
3253 SILC_STR_UI16_STRING_ALLOC(&id_string),
3256 /* Normal server cannot have other normal server connections */
3257 if (id_type == SILC_ID_SERVER && sock->type == SILC_SOCKET_TYPE_SERVER)
3260 id = silc_id_str2id(id_string, id_type);
3264 /* If the packet is originated from the one who sent it to us we know
3265 that the ID belongs to our cell, unless the sender was router. */
3266 tmpid = silc_id_str2id(packet->src_id, SILC_ID_SERVER);
3267 tmpserver = (SilcServerEntry)sock->user_data;
3269 if (!SILC_ID_SERVER_COMPARE(tmpid, tmpserver->id) &&
3270 sock->type == SILC_SOCKET_TYPE_SERVER) {
3271 id_list = server->local_list;
3273 router = sock->user_data;
3274 /* router = server->id_entry; */
3276 id_list = server->global_list;
3277 router_sock = (SilcSocketConnection)server->id_entry->router->connection;
3278 router = server->id_entry->router;
3284 case SILC_ID_CLIENT:
3286 SilcClientEntry idlist;
3288 /* Add the client to our local list. We are router and we keep
3289 cell specific local database of all clients in the cell. */
3290 idlist = silc_idlist_add_client(id_list, NULL, NULL, NULL,
3291 id, router, NULL, NULL,
3292 NULL, NULL, NULL, router_sock);
3296 case SILC_ID_SERVER:
3298 SilcServerEntry idlist;
3300 /* Add the server to our local list. We are router and we keep
3301 cell specific local database of all servers in the cell. */
3302 idlist = silc_idlist_add_server(id_list, NULL, 0,
3303 id, router, NULL, NULL,
3304 NULL, NULL, NULL, router_sock);
3308 case SILC_ID_CHANNEL:
3309 /* Add the channel to our local list. We are router and we keep
3310 cell specific local database of all channels in the cell. */
3311 silc_idlist_add_channel(id_list, NULL, 0, id, router, NULL);
3320 silc_free(id_string);
3323 /* Received packet to remove a user from a channel. Routers notify other
3324 routers that user has left a channel. Client must not send this packet.
3325 Normal server may send this packet but ignores if it receives one. */
3327 void silc_server_remove_channel_user(SilcServer server,
3328 SilcSocketConnection sock,
3329 SilcPacketContext *packet)
3331 SilcBuffer buffer = packet->buffer;
3332 unsigned char *tmp1 = NULL, *tmp2 = NULL;
3333 SilcClientID *client_id = NULL;
3334 SilcChannelID *channel_id = NULL;
3335 SilcChannelEntry channel;
3336 SilcClientEntry client;
3338 SILC_LOG_DEBUG(("Removing user from channel"));
3340 if (sock->type == SILC_SOCKET_TYPE_CLIENT ||
3341 server->server_type == SILC_SERVER)
3344 silc_buffer_unformat(buffer,
3345 SILC_STR_UI16_STRING_ALLOC(&tmp1),
3346 SILC_STR_UI16_STRING_ALLOC(&tmp2),
3352 client_id = silc_id_str2id(tmp1, SILC_ID_CLIENT);
3353 channel_id = silc_id_str2id(tmp2, SILC_ID_CHANNEL);
3354 if (!client_id || !channel_id)
3357 /* XXX routers should check server->global_list as well */
3358 /* Get channel entry */
3359 channel = silc_idlist_find_channel_by_id(server->local_list, channel_id);
3363 /* XXX routers should check server->global_list as well */
3364 /* Get client entry */
3365 client = silc_idlist_find_client_by_id(server->local_list, client_id);
3369 /* Remove from channel */
3370 silc_server_remove_from_one_channel(server, sock, channel, client, FALSE);
3378 silc_free(client_id);
3380 silc_free(channel_id);