5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2001 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
22 #include "clientlibincludes.h"
23 #include "client_internal.h"
25 /* Static task callback prototypes */
26 SILC_TASK_CALLBACK(silc_client_connect_to_server_start);
27 SILC_TASK_CALLBACK(silc_client_connect_to_server_second);
28 SILC_TASK_CALLBACK(silc_client_connect_to_server_final);
29 SILC_TASK_CALLBACK(silc_client_packet_parse_real);
30 SILC_TASK_CALLBACK(silc_client_rekey_callback);
31 SILC_TASK_CALLBACK(silc_client_rekey_final);
33 static void silc_client_packet_parse(SilcPacketParserContext *parser_context);
34 static void silc_client_packet_parse_type(SilcClient client,
35 SilcSocketConnection sock,
36 SilcPacketContext *packet);
38 /* Allocates new client object. This has to be done before client may
39 work. After calling this one must call silc_client_init to initialize
40 the client. The `application' is application specific user data pointer
41 and caller must free it. */
43 SilcClient silc_client_alloc(SilcClientOperations *ops, void *application)
45 SilcClient new_client;
47 new_client = silc_calloc(1, sizeof(*new_client));
48 new_client->application = application;
49 new_client->ops = ops;
54 /* Frees client object and its internals. */
56 void silc_client_free(SilcClient client)
60 silc_rng_free(client->rng);
66 /* Initializes the client. This makes all the necessary steps to make
67 the client ready to be run. One must call silc_client_run to run the
68 client. Returns FALSE if error occured, TRUE otherwise. */
70 int silc_client_init(SilcClient client)
72 SILC_LOG_DEBUG(("Initializing client"));
74 /* Initialize hash functions for client to use */
75 silc_hash_alloc("md5", &client->md5hash);
76 silc_hash_alloc("sha1", &client->sha1hash);
78 /* Initialize none cipher */
79 silc_cipher_alloc("none", &client->none_cipher);
81 /* Initialize random number generator */
82 client->rng = silc_rng_alloc();
83 silc_rng_init(client->rng);
84 silc_rng_global_init(client->rng);
86 /* Register protocols */
87 silc_client_protocols_register();
89 /* Initialize the scheduler */
90 silc_schedule_init(&client->io_queue, &client->timeout_queue,
91 &client->generic_queue, 5000);
96 /* Stops the client. This is called to stop the client and thus to stop
99 void silc_client_stop(SilcClient client)
101 SILC_LOG_DEBUG(("Stopping client"));
103 /* Stop the scheduler, although it might be already stopped. This
104 doesn't hurt anyone. This removes all the tasks and task queues,
106 silc_schedule_stop();
107 silc_schedule_uninit();
109 silc_client_protocols_unregister();
111 SILC_LOG_DEBUG(("Client stopped"));
114 /* Runs the client. This starts the scheduler from the utility library.
115 When this functions returns the execution of the appliation is over. */
117 void silc_client_run(SilcClient client)
119 SILC_LOG_DEBUG(("Running client"));
121 /* Start the scheduler, the heart of the SILC client. When this returns
122 the program will be terminated. */
126 /* Allocates and adds new connection to the client. This adds the allocated
127 connection to the connection table and returns a pointer to it. A client
128 can have multiple connections to multiple servers. Every connection must
129 be added to the client using this function. User data `context' may
130 be sent as argument. This function is normally used only if the
131 application performed the connecting outside the library. The library
132 however may use this internally. */
134 SilcClientConnection silc_client_add_connection(SilcClient client,
139 SilcClientConnection conn;
142 conn = silc_calloc(1, sizeof(*conn));
144 /* Initialize ID caches */
145 conn->client_cache = silc_idcache_alloc(0, NULL);
146 conn->channel_cache = silc_idcache_alloc(0, NULL);
147 conn->server_cache = silc_idcache_alloc(0, NULL);
148 conn->client = client;
149 conn->remote_host = strdup(hostname);
150 conn->remote_port = port;
151 conn->context = context;
152 conn->pending_commands = silc_dlist_init();
154 /* Add the connection to connections table */
155 for (i = 0; i < client->conns_count; i++)
156 if (client->conns && !client->conns[i]) {
157 client->conns[i] = conn;
161 client->conns = silc_realloc(client->conns, sizeof(*client->conns)
162 * (client->conns_count + 1));
163 client->conns[client->conns_count] = conn;
164 client->conns_count++;
169 /* Removes connection from client. Frees all memory. */
171 void silc_client_del_connection(SilcClient client, SilcClientConnection conn)
175 for (i = 0; i < client->conns_count; i++)
176 if (client->conns[i] == conn) {
177 if (conn->pending_commands)
178 silc_dlist_uninit(conn->pending_commands);
180 client->conns[i] = NULL;
184 /* Adds listener socket to the listener sockets table. This function is
185 used to add socket objects that are listeners to the client. This should
186 not be used to add other connection objects. */
188 void silc_client_add_socket(SilcClient client, SilcSocketConnection sock)
192 if (!client->sockets) {
193 client->sockets = silc_calloc(1, sizeof(*client->sockets));
194 client->sockets[0] = sock;
195 client->sockets_count = 1;
199 for (i = 0; i < client->sockets_count; i++) {
200 if (client->sockets[i] == NULL) {
201 client->sockets[i] = sock;
206 client->sockets = silc_realloc(client->sockets, sizeof(*client->sockets) *
207 (client->sockets_count + 1));
208 client->sockets[client->sockets_count] = sock;
209 client->sockets_count++;
212 /* Deletes listener socket from the listener sockets table. */
214 void silc_client_del_socket(SilcClient client, SilcSocketConnection sock)
218 if (!client->sockets)
221 for (i = 0; i < client->sockets_count; i++) {
222 if (client->sockets[i] == sock) {
223 client->sockets[i] = NULL;
230 silc_client_connect_to_server_internal(SilcClientInternalConnectContext *ctx)
234 /* XXX In the future we should give up this non-blocking connect all
235 together and use threads instead. */
236 /* Create connection to server asynchronously */
237 sock = silc_net_create_connection_async(ctx->port, ctx->host);
241 /* Register task that will receive the async connect and will
243 ctx->task = silc_task_register(ctx->client->io_queue, sock,
244 silc_client_connect_to_server_start,
247 SILC_TASK_PRI_NORMAL);
248 silc_task_reset_iotype(ctx->task, SILC_TASK_WRITE);
249 silc_schedule_set_listen_fd(sock, ctx->task->iomask);
256 /* Connects to remote server. This is the main routine used to connect
257 to SILC server. Returns -1 on error and the created socket otherwise.
258 The `context' is user context that is saved into the SilcClientConnection
259 that is created after the connection is created. Note that application
260 may handle the connecting process outside the library. If this is the
261 case then this function is not used at all. When the connecting is
262 done the `connect' client operation is called. */
264 int silc_client_connect_to_server(SilcClient client, int port,
265 char *host, void *context)
267 SilcClientInternalConnectContext *ctx;
268 SilcClientConnection conn;
271 SILC_LOG_DEBUG(("Connecting to port %d of server %s",
274 conn = silc_client_add_connection(client, host, port, context);
276 client->ops->say(client, conn,
277 "Connecting to port %d of server %s", port, host);
279 /* Allocate internal context for connection process. This is
280 needed as we are doing async connecting. */
281 ctx = silc_calloc(1, sizeof(*ctx));
282 ctx->client = client;
284 ctx->host = strdup(host);
288 /* Do the actual connecting process */
289 sock = silc_client_connect_to_server_internal(ctx);
291 silc_client_del_connection(client, conn);
295 /* Start SILC Key Exchange (SKE) protocol to negotiate shared secret
296 key material between client and server. This function can be called
297 directly if application is performing its own connecting and does not
298 use the connecting provided by this library. This function is normally
299 used only if the application performed the connecting outside the library.
300 The library however may use this internally. */
302 int silc_client_start_key_exchange(SilcClient client,
303 SilcClientConnection conn,
306 SilcProtocol protocol;
307 SilcClientKEInternalContext *proto_ctx;
310 /* Allocate new socket connection object */
311 silc_socket_alloc(fd, SILC_SOCKET_TYPE_SERVER, (void *)conn, &conn->sock);
313 conn->nickname = strdup(client->username);
314 conn->sock->hostname = conn->remote_host;
315 conn->sock->ip = strdup(conn->remote_host);
316 conn->sock->port = conn->remote_port;
318 /* Allocate internal Key Exchange context. This is sent to the
319 protocol as context. */
320 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
321 proto_ctx->client = (void *)client;
322 proto_ctx->sock = conn->sock;
323 proto_ctx->rng = client->rng;
324 proto_ctx->responder = FALSE;
325 proto_ctx->send_packet = silc_client_protocol_ke_send_packet;
326 proto_ctx->verify = silc_client_protocol_ke_verify_key;
328 /* Perform key exchange protocol. silc_client_connect_to_server_final
329 will be called after the protocol is finished. */
330 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_KEY_EXCHANGE,
331 &protocol, (void *)proto_ctx,
332 silc_client_connect_to_server_second);
334 client->ops->say(client, conn,
335 "Error: Could not start authentication protocol");
338 conn->sock->protocol = protocol;
340 /* Register the connection for network input and output. This sets
341 that scheduler will listen for incoming packets for this connection
342 and sets that outgoing packets may be sent to this connection as well.
343 However, this doesn't set the scheduler for outgoing traffic, it will
344 be set separately by calling SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT,
345 later when outgoing data is available. */
346 context = (void *)client;
347 SILC_CLIENT_REGISTER_CONNECTION_FOR_IO(fd);
349 /* Execute the protocol */
350 protocol->execute(client->timeout_queue, 0, protocol, fd, 0, 0);
354 /* Start of the connection to the remote server. This is called after
355 succesful TCP/IP connection has been established to the remote host. */
357 SILC_TASK_CALLBACK(silc_client_connect_to_server_start)
359 SilcClientInternalConnectContext *ctx =
360 (SilcClientInternalConnectContext *)context;
361 SilcClient client = ctx->client;
362 SilcClientConnection conn = ctx->conn;
363 int opt, opt_len = sizeof(opt);
365 SILC_LOG_DEBUG(("Start"));
367 /* Check the socket status as it might be in error */
368 getsockopt(fd, SOL_SOCKET, SO_ERROR, &opt, &opt_len);
370 if (ctx->tries < 2) {
371 /* Connection failed but lets try again */
372 client->ops->say(client, conn, "Could not connect to server %s: %s",
373 ctx->host, strerror(opt));
374 client->ops->say(client, conn,
375 "Connecting to port %d of server %s resumed",
376 ctx->port, ctx->host);
378 /* Unregister old connection try */
379 silc_schedule_unset_listen_fd(fd);
380 silc_net_close_connection(fd);
381 silc_task_unregister(client->io_queue, ctx->task);
384 silc_client_connect_to_server_internal(ctx);
387 /* Connection failed and we won't try anymore */
388 client->ops->say(client, conn, "Could not connect to server %s: %s",
389 ctx->host, strerror(opt));
390 silc_schedule_unset_listen_fd(fd);
391 silc_net_close_connection(fd);
392 silc_task_unregister(client->io_queue, ctx->task);
395 /* Notify application of failure */
396 client->ops->connect(client, conn, FALSE);
397 silc_client_del_connection(client, conn);
402 silc_schedule_unset_listen_fd(fd);
403 silc_task_unregister(client->io_queue, ctx->task);
406 if (!silc_client_start_key_exchange(client, conn, fd)) {
407 silc_net_close_connection(fd);
408 client->ops->connect(client, conn, FALSE);
412 /* Second part of the connecting to the server. This executed
413 authentication protocol. */
415 SILC_TASK_CALLBACK(silc_client_connect_to_server_second)
417 SilcProtocol protocol = (SilcProtocol)context;
418 SilcClientKEInternalContext *ctx =
419 (SilcClientKEInternalContext *)protocol->context;
420 SilcClient client = (SilcClient)ctx->client;
421 SilcSocketConnection sock = NULL;
422 SilcClientConnAuthInternalContext *proto_ctx;
424 SILC_LOG_DEBUG(("Start"));
426 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
427 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
428 /* Error occured during protocol */
429 SILC_LOG_DEBUG(("Error during KE protocol"));
430 silc_protocol_free(protocol);
431 silc_ske_free_key_material(ctx->keymat);
433 silc_ske_free(ctx->ske);
435 silc_free(ctx->dest_id);
436 ctx->sock->protocol = NULL;
437 silc_task_unregister_by_callback(client->timeout_queue,
438 silc_client_failure_callback);
440 /* Notify application of failure */
441 client->ops->connect(client, ctx->sock->user_data, FALSE);
446 /* We now have the key material as the result of the key exchange
447 protocol. Take the key material into use. Free the raw key material
448 as soon as we've set them into use. */
449 silc_client_protocol_ke_set_keys(ctx->ske, ctx->sock, ctx->keymat,
450 ctx->ske->prop->cipher,
451 ctx->ske->prop->pkcs,
452 ctx->ske->prop->hash,
453 ctx->ske->prop->hmac,
454 ctx->ske->prop->group);
455 silc_ske_free_key_material(ctx->keymat);
457 /* Allocate internal context for the authentication protocol. This
458 is sent as context for the protocol. */
459 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
460 proto_ctx->client = (void *)client;
461 proto_ctx->sock = sock = ctx->sock;
462 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
463 proto_ctx->dest_id_type = ctx->dest_id_type;
464 proto_ctx->dest_id = ctx->dest_id;
466 /* Resolve the authentication method to be used in this connection */
467 if (!client->ops->get_auth_method(client, sock->user_data, sock->hostname,
468 sock->port, &proto_ctx->auth_meth,
469 &proto_ctx->auth_data,
470 &proto_ctx->auth_data_len)) {
471 client->ops->say(client, ctx->sock->user_data,
472 "Could not resolve authentication method to use, "
473 "assume no authentication");
474 proto_ctx->auth_meth = SILC_AUTH_NONE;
477 /* Free old protocol as it is finished now */
478 silc_protocol_free(protocol);
480 silc_packet_context_free(ctx->packet);
482 sock->protocol = NULL;
484 /* Allocate the authentication protocol. This is allocated here
485 but we won't start it yet. We will be receiving party of this
486 protocol thus we will wait that connecting party will make
488 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_CONNECTION_AUTH,
489 &sock->protocol, (void *)proto_ctx,
490 silc_client_connect_to_server_final);
492 /* Execute the protocol */
493 sock->protocol->execute(client->timeout_queue, 0, sock->protocol, fd, 0, 0);
496 /* Finalizes the connection to the remote SILC server. This is called
497 after authentication protocol has been completed. This send our
498 user information to the server to receive our client ID from
501 SILC_TASK_CALLBACK(silc_client_connect_to_server_final)
503 SilcProtocol protocol = (SilcProtocol)context;
504 SilcClientConnAuthInternalContext *ctx =
505 (SilcClientConnAuthInternalContext *)protocol->context;
506 SilcClient client = (SilcClient)ctx->client;
507 SilcClientConnection conn = (SilcClientConnection)ctx->sock->user_data;
510 SILC_LOG_DEBUG(("Start"));
512 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
513 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
514 /* Error occured during protocol */
515 SILC_LOG_DEBUG(("Error during authentication protocol"));
516 silc_protocol_free(protocol);
518 silc_free(ctx->auth_data);
520 silc_ske_free(ctx->ske);
522 silc_free(ctx->dest_id);
523 conn->sock->protocol = NULL;
524 silc_task_unregister_by_callback(client->timeout_queue,
525 silc_client_failure_callback);
527 /* Notify application of failure */
528 client->ops->connect(client, ctx->sock->user_data, FALSE);
533 /* Send NEW_CLIENT packet to the server. We will become registered
534 to the SILC network after sending this packet and we will receive
535 client ID from the server. */
536 packet = silc_buffer_alloc(2 + 2 + strlen(client->username) +
537 strlen(client->realname));
538 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
539 silc_buffer_format(packet,
540 SILC_STR_UI_SHORT(strlen(client->username)),
541 SILC_STR_UI_XNSTRING(client->username,
542 strlen(client->username)),
543 SILC_STR_UI_SHORT(strlen(client->realname)),
544 SILC_STR_UI_XNSTRING(client->realname,
545 strlen(client->realname)),
548 /* Send the packet */
549 silc_client_packet_send(client, ctx->sock, SILC_PACKET_NEW_CLIENT,
551 packet->data, packet->len, TRUE);
552 silc_buffer_free(packet);
554 /* Save remote ID. */
555 conn->remote_id = ctx->dest_id;
556 conn->remote_id_data = silc_id_id2str(ctx->dest_id, SILC_ID_SERVER);
557 conn->remote_id_data_len = SILC_ID_SERVER_LEN;
559 /* Register re-key timeout */
560 conn->rekey->timeout = 3600; /* XXX hardcoded */
561 conn->rekey->context = (void *)client;
562 silc_task_register(client->timeout_queue, conn->sock->sock,
563 silc_client_rekey_callback,
564 (void *)conn->sock, conn->rekey->timeout, 0,
565 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
567 silc_task_unregister_by_callback(client->timeout_queue,
568 silc_client_failure_callback);
569 silc_protocol_free(protocol);
571 silc_free(ctx->auth_data);
573 silc_ske_free(ctx->ske);
575 conn->sock->protocol = NULL;
578 /* Internal routine that sends packet or marks packet to be sent. This
579 is used directly only in special cases. Normal cases should use
580 silc_server_packet_send. Returns < 0 on error. */
582 int silc_client_packet_send_real(SilcClient client,
583 SilcSocketConnection sock,
588 /* Send the packet */
589 ret = silc_packet_send(sock, force_send);
593 /* Mark that there is some outgoing data available for this connection.
594 This call sets the connection both for input and output (the input
595 is set always and this call keeps the input setting, actually).
596 Actual data sending is performed by silc_client_packet_process. */
597 SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(sock->sock);
599 /* Mark to socket that data is pending in outgoing buffer. This flag
600 is needed if new data is added to the buffer before the earlier
601 put data is sent to the network. */
602 SILC_SET_OUTBUF_PENDING(sock);
607 /* Packet processing callback. This is used to send and receive packets
608 from network. This is generic task. */
610 SILC_TASK_CALLBACK_GLOBAL(silc_client_packet_process)
612 SilcClient client = (SilcClient)context;
613 SilcSocketConnection sock = NULL;
614 SilcClientConnection conn;
617 SILC_LOG_DEBUG(("Processing packet"));
619 SILC_CLIENT_GET_SOCK(client, fd, sock);
623 conn = (SilcClientConnection)sock->user_data;
626 if (type == SILC_TASK_WRITE) {
627 SILC_LOG_DEBUG(("Writing data to connection"));
629 if (sock->outbuf->data - sock->outbuf->head)
630 silc_buffer_push(sock->outbuf,
631 sock->outbuf->data - sock->outbuf->head);
633 ret = silc_client_packet_send_real(client, sock, TRUE);
635 /* If returned -2 could not write to connection now, will do
640 /* The packet has been sent and now it is time to set the connection
641 back to only for input. When there is again some outgoing data
642 available for this connection it will be set for output as well.
643 This call clears the output setting and sets it only for input. */
644 SILC_CLIENT_SET_CONNECTION_FOR_INPUT(fd);
645 SILC_UNSET_OUTBUF_PENDING(sock);
647 silc_buffer_clear(sock->outbuf);
651 /* Packet receiving */
652 if (type == SILC_TASK_READ) {
653 SILC_LOG_DEBUG(("Reading data from connection"));
655 /* Read data from network */
656 ret = silc_packet_receive(sock);
662 SILC_LOG_DEBUG(("Read EOF"));
664 /* If connection is disconnecting already we will finally
665 close the connection */
666 if (SILC_IS_DISCONNECTING(sock)) {
667 if (sock == conn->sock)
668 client->ops->disconnect(client, conn);
669 silc_client_close_connection(client, sock, conn);
673 SILC_LOG_DEBUG(("EOF from connection %d", sock->sock));
674 if (sock == conn->sock)
675 client->ops->disconnect(client, conn);
676 silc_client_close_connection(client, sock, conn);
680 /* Process the packet. This will call the parser that will then
681 decrypt and parse the packet. */
682 if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
683 silc_packet_receive_process(sock, conn->receive_key, conn->hmac,
684 silc_client_packet_parse, client);
686 silc_packet_receive_process(sock, NULL, NULL,
687 silc_client_packet_parse, client);
691 /* Callback function that the silc_packet_decrypt will call to make the
692 decision whether the packet is normal or special packet. We will
693 return TRUE if it is normal and FALSE if it is special */
695 static int silc_client_packet_decrypt_check(SilcPacketType packet_type,
697 SilcPacketContext *packet,
701 /* Packet is normal packet, if:
703 1) packet is private message packet and does not have private key set
704 2) is other packet than channel message packet
706 all other packets are special packets
709 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
710 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
713 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE)
719 /* Parses whole packet, received earlier. */
721 SILC_TASK_CALLBACK(silc_client_packet_parse_real)
723 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
724 SilcClient client = (SilcClient)parse_ctx->context;
725 SilcPacketContext *packet = parse_ctx->packet;
726 SilcBuffer buffer = packet->buffer;
727 SilcSocketConnection sock = parse_ctx->sock;
728 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
731 SILC_LOG_DEBUG(("Start"));
733 /* Decrypt the received packet */
734 if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
735 ret = silc_packet_decrypt(conn->receive_key, conn->hmac, buffer, packet,
736 silc_client_packet_decrypt_check, parse_ctx);
738 ret = silc_packet_decrypt(NULL, NULL, buffer, packet,
739 silc_client_packet_decrypt_check, parse_ctx);
745 /* Parse the packet. Packet type is returned. */
746 ret = silc_packet_parse(packet);
748 /* Parse the packet header in special way as this is "special"
750 ret = silc_packet_parse_special(packet);
753 if (ret == SILC_PACKET_NONE)
756 /* Parse the incoming packet type */
757 silc_client_packet_parse_type(client, sock, packet);
760 /* silc_buffer_clear(sock->inbuf); */
761 silc_packet_context_free(packet);
762 silc_free(parse_ctx);
765 /* Parser callback called by silc_packet_receive_process. Thie merely
766 registers timeout that will handle the actual parsing when appropriate. */
768 void silc_client_packet_parse(SilcPacketParserContext *parser_context)
770 SilcClient client = (SilcClient)parser_context->context;
772 /* Parse the packet */
773 silc_task_register(client->timeout_queue, parser_context->sock->sock,
774 silc_client_packet_parse_real,
775 (void *)parser_context, 0, 1,
777 SILC_TASK_PRI_NORMAL);
780 /* Parses the packet type and calls what ever routines the packet type
781 requires. This is done for all incoming packets. */
783 void silc_client_packet_parse_type(SilcClient client,
784 SilcSocketConnection sock,
785 SilcPacketContext *packet)
787 SilcBuffer buffer = packet->buffer;
788 SilcPacketType type = packet->type;
790 SILC_LOG_DEBUG(("Parsing packet type %d", type));
792 /* Parse the packet type */
794 case SILC_PACKET_DISCONNECT:
795 silc_client_disconnected_by_server(client, sock, buffer);
797 case SILC_PACKET_SUCCESS:
799 * Success received for something. For now we can have only
800 * one protocol for connection executing at once hence this
801 * success message is for whatever protocol is executing currently.
803 if (sock->protocol) {
804 sock->protocol->execute(client->timeout_queue, 0,
805 sock->protocol, sock->sock, 0, 0);
808 case SILC_PACKET_FAILURE:
810 * Failure received for some protocol. Set the protocol state to
811 * error and call the protocol callback. This fill cause error on
812 * protocol and it will call the final callback.
814 silc_client_process_failure(client, sock, packet);
816 case SILC_PACKET_REJECT:
819 case SILC_PACKET_NOTIFY:
821 * Received notify message
823 silc_client_notify_by_server(client, sock, packet);
826 case SILC_PACKET_ERROR:
828 * Received error message
830 silc_client_error_by_server(client, sock, buffer);
833 case SILC_PACKET_CHANNEL_MESSAGE:
835 * Received message to (from, actually) a channel
837 silc_client_channel_message(client, sock, packet);
839 case SILC_PACKET_CHANNEL_KEY:
841 * Received key for a channel. By receiving this key the client will be
842 * able to talk to the channel it has just joined. This can also be
843 * a new key for existing channel as keys expire peridiocally.
845 silc_client_receive_channel_key(client, sock, buffer);
848 case SILC_PACKET_PRIVATE_MESSAGE:
850 * Received private message
852 silc_client_private_message(client, sock, packet);
854 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
856 * Received private message key
860 case SILC_PACKET_COMMAND_REPLY:
862 * Recived reply for a command
864 silc_client_command_reply_process(client, sock, packet);
867 case SILC_PACKET_KEY_EXCHANGE:
868 if (sock->protocol && sock->protocol->protocol &&
869 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE) {
870 SilcClientKEInternalContext *proto_ctx =
871 (SilcClientKEInternalContext *)sock->protocol->context;
873 proto_ctx->packet = silc_packet_context_dup(packet);
874 proto_ctx->dest_id_type = packet->src_id_type;
875 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
876 packet->src_id_type);
877 if (!proto_ctx->dest_id)
880 /* Let the protocol handle the packet */
881 sock->protocol->execute(client->timeout_queue, 0,
882 sock->protocol, sock->sock, 0, 0);
884 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
885 "protocol active, packet dropped."));
887 /* XXX Trigger KE protocol?? Rekey actually! */
891 case SILC_PACKET_KEY_EXCHANGE_1:
892 if (sock->protocol && sock->protocol->protocol &&
893 (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
894 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
896 if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
897 SilcClientRekeyInternalContext *proto_ctx =
898 (SilcClientRekeyInternalContext *)sock->protocol->context;
900 if (proto_ctx->packet)
901 silc_packet_context_free(proto_ctx->packet);
903 proto_ctx->packet = silc_packet_context_dup(packet);
905 /* Let the protocol handle the packet */
906 sock->protocol->execute(client->timeout_queue, 0,
907 sock->protocol, sock->sock, 0, 0);
909 SilcClientKEInternalContext *proto_ctx =
910 (SilcClientKEInternalContext *)sock->protocol->context;
912 if (proto_ctx->packet)
913 silc_packet_context_free(proto_ctx->packet);
915 proto_ctx->packet = silc_packet_context_dup(packet);
916 proto_ctx->dest_id_type = packet->src_id_type;
917 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
918 packet->src_id_type);
919 if (!proto_ctx->dest_id)
922 /* Let the protocol handle the packet */
923 sock->protocol->execute(client->timeout_queue, 0,
924 sock->protocol, sock->sock, 0, 0);
927 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
928 "protocol active, packet dropped."));
931 case SILC_PACKET_KEY_EXCHANGE_2:
932 if (sock->protocol && sock->protocol->protocol &&
933 (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
934 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
936 if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
937 SilcClientRekeyInternalContext *proto_ctx =
938 (SilcClientRekeyInternalContext *)sock->protocol->context;
940 if (proto_ctx->packet)
941 silc_packet_context_free(proto_ctx->packet);
943 proto_ctx->packet = silc_packet_context_dup(packet);
945 /* Let the protocol handle the packet */
946 sock->protocol->execute(client->timeout_queue, 0,
947 sock->protocol, sock->sock, 0, 0);
949 SilcClientKEInternalContext *proto_ctx =
950 (SilcClientKEInternalContext *)sock->protocol->context;
952 if (proto_ctx->packet)
953 silc_packet_context_free(proto_ctx->packet);
955 proto_ctx->packet = silc_packet_context_dup(packet);
956 proto_ctx->dest_id_type = packet->src_id_type;
957 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
958 packet->src_id_type);
959 if (!proto_ctx->dest_id)
962 /* Let the protocol handle the packet */
963 sock->protocol->execute(client->timeout_queue, 0,
964 sock->protocol, sock->sock, 0, 0);
967 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
968 "protocol active, packet dropped."));
972 case SILC_PACKET_NEW_ID:
975 * Received new ID from server. This packet is received at
976 * the connection to the server. New ID is also received when
977 * user changes nickname but in that case the new ID is received
978 * as command reply and not as this packet type.
982 idp = silc_id_payload_parse(buffer);
985 if (silc_id_payload_get_type(idp) != SILC_ID_CLIENT)
988 silc_client_receive_new_id(client, sock, idp);
989 silc_id_payload_free(idp);
993 case SILC_PACKET_HEARTBEAT:
995 * Received heartbeat packet
997 SILC_LOG_DEBUG(("Heartbeat packet"));
1000 case SILC_PACKET_KEY_AGREEMENT:
1002 * Received key agreement packet
1004 SILC_LOG_DEBUG(("Key agreement packet"));
1005 silc_client_key_agreement(client, sock, packet);
1008 case SILC_PACKET_REKEY:
1009 SILC_LOG_DEBUG(("Re-key packet"));
1010 /* We ignore this for now */
1013 case SILC_PACKET_REKEY_DONE:
1014 SILC_LOG_DEBUG(("Re-key done packet"));
1016 if (sock->protocol && sock->protocol->protocol &&
1017 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
1019 SilcClientRekeyInternalContext *proto_ctx =
1020 (SilcClientRekeyInternalContext *)sock->protocol->context;
1022 if (proto_ctx->packet)
1023 silc_packet_context_free(proto_ctx->packet);
1025 proto_ctx->packet = silc_packet_context_dup(packet);
1027 /* Let the protocol handle the packet */
1028 sock->protocol->execute(client->timeout_queue, 0,
1029 sock->protocol, sock->sock, 0, 100000);
1031 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1032 "protocol active, packet dropped."));
1037 SILC_LOG_DEBUG(("Incorrect packet type %d, packet dropped", type));
1042 /* Sends packet. This doesn't actually send the packet instead it assembles
1043 it and marks it to be sent. However, if force_send is TRUE the packet
1044 is sent immediately. if dst_id, cipher and hmac are NULL those parameters
1045 will be derived from sock argument. Otherwise the valid arguments sent
1048 void silc_client_packet_send(SilcClient client,
1049 SilcSocketConnection sock,
1050 SilcPacketType type,
1052 SilcIdType dst_id_type,
1055 unsigned char *data,
1059 SilcPacketContext packetdata;
1061 SILC_LOG_DEBUG(("Sending packet, type %d", type));
1063 /* Get data used in the packet sending, keys and stuff */
1064 if ((!cipher || !hmac || !dst_id) && sock->user_data) {
1065 if (!cipher && ((SilcClientConnection)sock->user_data)->send_key)
1066 cipher = ((SilcClientConnection)sock->user_data)->send_key;
1068 if (!hmac && ((SilcClientConnection)sock->user_data)->hmac)
1069 hmac = ((SilcClientConnection)sock->user_data)->hmac;
1071 if (!dst_id && ((SilcClientConnection)sock->user_data)->remote_id) {
1072 dst_id = ((SilcClientConnection)sock->user_data)->remote_id;
1073 dst_id_type = SILC_ID_SERVER;
1077 /* Set the packet context pointers */
1078 packetdata.flags = 0;
1079 packetdata.type = type;
1080 if (sock->user_data &&
1081 ((SilcClientConnection)sock->user_data)->local_id_data)
1082 packetdata.src_id = ((SilcClientConnection)sock->user_data)->local_id_data;
1084 packetdata.src_id = silc_calloc(SILC_ID_CLIENT_LEN, sizeof(unsigned char));
1085 packetdata.src_id_len = SILC_ID_CLIENT_LEN;
1086 packetdata.src_id_type = SILC_ID_CLIENT;
1088 packetdata.dst_id = silc_id_id2str(dst_id, dst_id_type);
1089 packetdata.dst_id_len = silc_id_get_len(dst_id_type);
1090 packetdata.dst_id_type = dst_id_type;
1092 packetdata.dst_id = NULL;
1093 packetdata.dst_id_len = 0;
1094 packetdata.dst_id_type = SILC_ID_NONE;
1096 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1097 packetdata.src_id_len + packetdata.dst_id_len;
1098 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1100 /* Prepare outgoing data buffer for packet sending */
1101 silc_packet_send_prepare(sock,
1102 SILC_PACKET_HEADER_LEN +
1103 packetdata.src_id_len +
1104 packetdata.dst_id_len,
1108 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
1110 packetdata.buffer = sock->outbuf;
1112 /* Put the data to the buffer */
1113 if (data && data_len)
1114 silc_buffer_put(sock->outbuf, data, data_len);
1116 /* Create the outgoing packet */
1117 silc_packet_assemble(&packetdata);
1119 /* Encrypt the packet */
1121 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1123 SILC_LOG_HEXDUMP(("Packet, len %d", sock->outbuf->len),
1124 sock->outbuf->data, sock->outbuf->len);
1126 /* Now actually send the packet */
1127 silc_client_packet_send_real(client, sock, force_send);
1130 /* Closes connection to remote end. Free's all allocated data except
1131 for some information such as nickname etc. that are valid at all time.
1132 If the `sock' is NULL then the conn->sock will be used. If `sock' is
1133 provided it will be checked whether the sock and `conn->sock' are the
1134 same (they can be different, ie. a socket can use `conn' as its
1135 connection but `conn->sock' might be actually a different connection
1136 than the `sock'). */
1138 void silc_client_close_connection(SilcClient client,
1139 SilcSocketConnection sock,
1140 SilcClientConnection conn)
1144 if (!sock || (sock && conn->sock == sock))
1149 /* We won't listen for this connection anymore */
1150 silc_schedule_unset_listen_fd(sock->sock);
1152 /* Unregister all tasks */
1153 silc_task_unregister_by_fd(client->io_queue, sock->sock);
1154 silc_task_unregister_by_fd(client->timeout_queue, sock->sock);
1156 /* Close the actual connection */
1157 silc_net_close_connection(sock->sock);
1159 /* Free everything */
1160 if (del && sock->user_data) {
1161 /* XXX Free all client entries and channel entries. */
1163 client->ops->say(client, sock->user_data,
1164 "Closed connection to host %s", sock->hostname);
1166 /* Clear ID caches */
1167 silc_idcache_del_all(conn->client_cache);
1168 silc_idcache_del_all(conn->channel_cache);
1171 if (conn->remote_host)
1172 silc_free(conn->remote_host);
1174 silc_free(conn->local_id);
1175 if (conn->local_id_data)
1176 silc_free(conn->local_id_data);
1178 silc_cipher_free(conn->send_key);
1179 if (conn->receive_key)
1180 silc_cipher_free(conn->receive_key);
1182 silc_hmac_free(conn->hmac);
1183 if (conn->pending_commands)
1184 silc_dlist_uninit(conn->pending_commands);
1186 silc_free(conn->rekey);
1189 conn->remote_port = 0;
1190 conn->remote_type = 0;
1191 conn->send_key = NULL;
1192 conn->receive_key = NULL;
1194 conn->local_id = NULL;
1195 conn->local_id_data = NULL;
1196 conn->remote_host = NULL;
1197 conn->current_channel = NULL;
1198 conn->pending_commands = NULL;
1201 silc_client_del_connection(client, conn);
1204 if (sock->protocol) {
1205 silc_protocol_free(sock->protocol);
1206 sock->protocol = NULL;
1208 silc_socket_free(sock);
1211 /* Called when we receive disconnection packet from server. This
1212 closes our end properly and displays the reason of the disconnection
1215 void silc_client_disconnected_by_server(SilcClient client,
1216 SilcSocketConnection sock,
1221 SILC_LOG_DEBUG(("Server disconnected us, sock %d", sock->sock));
1223 msg = silc_calloc(message->len + 1, sizeof(char));
1224 memcpy(msg, message->data, message->len);
1225 client->ops->say(client, sock->user_data, msg);
1228 SILC_SET_DISCONNECTED(sock);
1229 silc_client_close_connection(client, sock, sock->user_data);
1232 /* Received error message from server. Display it on the screen.
1233 We don't take any action what so ever of the error message. */
1235 void silc_client_error_by_server(SilcClient client,
1236 SilcSocketConnection sock,
1241 msg = silc_calloc(message->len + 1, sizeof(char));
1242 memcpy(msg, message->data, message->len);
1243 client->ops->say(client, sock->user_data, msg);
1247 /* Processes the received new Client ID from server. Old Client ID is
1248 deleted from cache and new one is added. */
1250 void silc_client_receive_new_id(SilcClient client,
1251 SilcSocketConnection sock,
1254 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1255 int connecting = FALSE;
1257 if (!conn->local_entry)
1260 /* Delete old ID from ID cache */
1261 silc_idcache_del_by_id(conn->client_cache, SILC_ID_CLIENT, conn->local_id);
1263 /* Save the new ID */
1265 silc_free(conn->local_id);
1266 if (conn->local_id_data)
1267 silc_free(conn->local_id_data);
1269 conn->local_id = silc_id_payload_get_id(idp);
1270 conn->local_id_data = silc_id_payload_get_data(idp);
1271 conn->local_id_data_len = silc_id_payload_get_len(idp);;
1273 if (!conn->local_entry)
1274 conn->local_entry = silc_calloc(1, sizeof(*conn->local_entry));
1276 conn->local_entry->nickname = conn->nickname;
1277 if (!conn->local_entry->username) {
1278 conn->local_entry->username =
1279 silc_calloc(strlen(client->username) + strlen(client->hostname) + 1,
1280 sizeof(conn->local_entry->username));
1281 sprintf(conn->local_entry->username, "%s@%s", client->username,
1284 conn->local_entry->server = strdup(conn->remote_host);
1285 conn->local_entry->id = conn->local_id;
1287 /* Put it to the ID cache */
1288 silc_idcache_add(conn->client_cache, conn->nickname, strlen(conn->nickname),
1289 SILC_ID_CLIENT, conn->local_id, (void *)conn->local_entry,
1292 /* Notify application of successful connection. We do it here now that
1293 we've received the Client ID and are allowed to send traffic. */
1295 client->ops->connect(client, conn, TRUE);
1298 /* Processed received Channel ID for a channel. This is called when client
1299 joins to channel and server replies with channel ID. The ID is cached.
1300 Returns the created channel entry. */
1302 SilcChannelEntry silc_client_new_channel_id(SilcClient client,
1303 SilcSocketConnection sock,
1308 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1309 SilcChannelEntry channel;
1311 SILC_LOG_DEBUG(("New channel ID"));
1313 channel = silc_calloc(1, sizeof(*channel));
1314 channel->channel_name = channel_name;
1315 channel->id = silc_id_payload_get_id(idp);
1316 channel->mode = mode;
1317 silc_list_init(channel->clients, struct SilcChannelUserStruct, next);
1319 conn->current_channel = channel;
1321 /* Put it to the ID cache */
1322 silc_idcache_add(conn->channel_cache, channel_name, strlen(channel_name),
1323 SILC_ID_CHANNEL, (void *)channel->id, (void *)channel,
1329 /* Removes a client entry from all channel it has joined. This really is
1330 a performance killer (client_entry should have pointers to channel
1333 void silc_client_remove_from_channels(SilcClient client,
1334 SilcClientConnection conn,
1335 SilcClientEntry client_entry)
1337 SilcIDCacheEntry id_cache;
1338 SilcIDCacheList list;
1339 SilcChannelEntry channel;
1340 SilcChannelUser chu;
1342 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
1343 SILC_ID_CHANNEL, &list))
1346 silc_idcache_list_first(list, &id_cache);
1347 channel = (SilcChannelEntry)id_cache->context;
1351 /* Remove client from channel */
1352 silc_list_start(channel->clients);
1353 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1354 if (chu->client == client_entry) {
1355 silc_list_del(channel->clients, chu);
1361 if (!silc_idcache_list_next(list, &id_cache))
1364 channel = (SilcChannelEntry)id_cache->context;
1367 silc_idcache_list_free(list);
1370 /* Replaces `old' client entries from all channels to `new' client entry.
1371 This can be called for example when nickname changes and old ID entry
1372 is replaced from ID cache with the new one. If the old ID entry is only
1373 updated, then this fucntion needs not to be called. */
1375 void silc_client_replace_from_channels(SilcClient client,
1376 SilcClientConnection conn,
1377 SilcClientEntry old,
1378 SilcClientEntry new)
1380 SilcIDCacheEntry id_cache;
1381 SilcIDCacheList list;
1382 SilcChannelEntry channel;
1383 SilcChannelUser chu;
1385 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
1386 SILC_ID_CHANNEL, &list))
1389 silc_idcache_list_first(list, &id_cache);
1390 channel = (SilcChannelEntry)id_cache->context;
1394 /* Replace client entry */
1395 silc_list_start(channel->clients);
1396 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1397 if (chu->client == old) {
1403 if (!silc_idcache_list_next(list, &id_cache))
1406 channel = (SilcChannelEntry)id_cache->context;
1409 silc_idcache_list_free(list);
1412 /* Parses mode mask and returns the mode as string. */
1414 char *silc_client_chmode(uint32 mode, SilcChannelEntry channel)
1421 memset(string, 0, sizeof(string));
1423 if (mode & SILC_CHANNEL_MODE_PRIVATE)
1424 strncat(string, "p", 1);
1426 if (mode & SILC_CHANNEL_MODE_SECRET)
1427 strncat(string, "s", 1);
1429 if (mode & SILC_CHANNEL_MODE_PRIVKEY)
1430 strncat(string, "k", 1);
1432 if (mode & SILC_CHANNEL_MODE_INVITE)
1433 strncat(string, "i", 1);
1435 if (mode & SILC_CHANNEL_MODE_TOPIC)
1436 strncat(string, "t", 1);
1438 if (mode & SILC_CHANNEL_MODE_ULIMIT)
1439 strncat(string, "l", 1);
1441 if (mode & SILC_CHANNEL_MODE_PASSPHRASE)
1442 strncat(string, "a", 1);
1444 if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)
1445 strncat(string, "f", 1);
1447 if (mode & SILC_CHANNEL_MODE_CIPHER) {
1449 memset(cipher, 0, sizeof(cipher));
1450 snprintf(cipher, sizeof(cipher), " c (%s)",
1451 channel->channel_key->cipher->name);
1452 strncat(string, cipher, strlen(cipher));
1455 if (mode & SILC_CHANNEL_MODE_HMAC) {
1457 memset(hmac, 0, sizeof(hmac));
1458 snprintf(hmac, sizeof(hmac), " h (%s)",
1459 channel->hmac->hmac->name);
1460 strncat(string, hmac, strlen(hmac));
1463 /* Rest of mode is ignored */
1465 return strdup(string);
1468 /* Parses channel user mode mask and returns te mode as string */
1470 char *silc_client_chumode(uint32 mode)
1477 memset(string, 0, sizeof(string));
1479 if (mode & SILC_CHANNEL_UMODE_CHANFO)
1480 strncat(string, "f", 1);
1482 if (mode & SILC_CHANNEL_UMODE_CHANOP)
1483 strncat(string, "o", 1);
1485 return strdup(string);
1488 /* Parses channel user mode and returns it as special mode character. */
1490 char *silc_client_chumode_char(uint32 mode)
1497 memset(string, 0, sizeof(string));
1499 if (mode & SILC_CHANNEL_UMODE_CHANFO)
1500 strncat(string, "*", 1);
1502 if (mode & SILC_CHANNEL_UMODE_CHANOP)
1503 strncat(string, "@", 1);
1505 return strdup(string);
1508 /* Failure timeout callback. If this is called then we will immediately
1509 process the received failure. We always process the failure with timeout
1510 since we do not want to blindly trust to received failure packets.
1511 This won't be called (the timeout is cancelled) if the failure was
1512 bogus (it is bogus if remote does not close the connection after sending
1515 SILC_TASK_CALLBACK_GLOBAL(silc_client_failure_callback)
1517 SilcClientFailureContext *f = (SilcClientFailureContext *)context;
1519 if (f->sock->protocol) {
1520 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1521 f->sock->protocol->execute(f->client->timeout_queue, 0,
1522 f->sock->protocol, f->sock->sock, 0, 0);
1524 /* Notify application */
1525 f->client->ops->failure(f->client, f->sock->user_data, f->sock->protocol,
1526 (void *)f->failure);
1532 /* Registers failure timeout to process the received failure packet
1535 void silc_client_process_failure(SilcClient client,
1536 SilcSocketConnection sock,
1537 SilcPacketContext *packet)
1539 SilcClientFailureContext *f;
1542 if (sock->protocol) {
1543 if (packet->buffer->len >= 4)
1544 SILC_GET32_MSB(failure, packet->buffer->data);
1546 f = silc_calloc(1, sizeof(*f));
1549 f->failure = failure;
1551 /* We will wait 5 seconds to process this failure packet */
1552 silc_task_register(client->timeout_queue, sock->sock,
1553 silc_client_failure_callback, (void *)f, 5, 0,
1554 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1558 /* A timeout callback for the re-key. We will be the initiator of the
1561 SILC_TASK_CALLBACK(silc_client_rekey_callback)
1563 SilcSocketConnection sock = (SilcSocketConnection)context;
1564 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1565 SilcClient client = (SilcClient)conn->rekey->context;
1566 SilcProtocol protocol;
1567 SilcClientRekeyInternalContext *proto_ctx;
1569 SILC_LOG_DEBUG(("Start"));
1571 /* Allocate internal protocol context. This is sent as context
1573 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1574 proto_ctx->client = (void *)client;
1575 proto_ctx->sock = sock;
1576 proto_ctx->responder = FALSE;
1577 proto_ctx->pfs = conn->rekey->pfs;
1579 /* Perform rekey protocol. Will call the final callback after the
1580 protocol is over. */
1581 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_REKEY,
1582 &protocol, proto_ctx, silc_client_rekey_final);
1583 sock->protocol = protocol;
1585 /* Run the protocol */
1586 protocol->execute(client->timeout_queue, 0, protocol,
1589 /* Re-register re-key timeout */
1590 silc_task_register(client->timeout_queue, sock->sock,
1591 silc_client_rekey_callback,
1592 context, conn->rekey->timeout, 0,
1593 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1596 /* The final callback for the REKEY protocol. This will actually take the
1597 new key material into use. */
1599 SILC_TASK_CALLBACK(silc_client_rekey_final)
1601 SilcProtocol protocol = (SilcProtocol)context;
1602 SilcClientRekeyInternalContext *ctx =
1603 (SilcClientRekeyInternalContext *)protocol->context;
1604 SilcClient client = (SilcClient)ctx->client;
1605 SilcSocketConnection sock = ctx->sock;
1607 SILC_LOG_DEBUG(("Start"));
1609 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1610 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1611 /* Error occured during protocol */
1612 silc_protocol_cancel(client->timeout_queue, protocol);
1613 silc_protocol_free(protocol);
1614 sock->protocol = NULL;
1616 silc_ske_free_key_material(ctx->keymat);
1618 silc_packet_context_free(ctx->packet);
1620 silc_ske_free(ctx->ske);
1625 /* Take the keys into use */
1626 if (ctx->pfs == TRUE)
1627 silc_client_protocol_rekey_generate_pfs(client, ctx);
1629 silc_client_protocol_rekey_generate(client, ctx);
1632 silc_protocol_free(protocol);
1633 sock->protocol = NULL;
1635 silc_ske_free_key_material(ctx->keymat);
1637 silc_packet_context_free(ctx->packet);
1639 silc_ske_free(ctx->ske);