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,
589 /* If rekey protocol is active we must assure that all packets are
590 sent through packet queue. */
591 if (flush == FALSE && SILC_CLIENT_IS_REKEY(sock))
594 /* Send the packet */
595 ret = silc_packet_send(sock, force_send);
599 /* Mark that there is some outgoing data available for this connection.
600 This call sets the connection both for input and output (the input
601 is set always and this call keeps the input setting, actually).
602 Actual data sending is performed by silc_client_packet_process. */
603 SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(sock->sock);
605 /* Mark to socket that data is pending in outgoing buffer. This flag
606 is needed if new data is added to the buffer before the earlier
607 put data is sent to the network. */
608 SILC_SET_OUTBUF_PENDING(sock);
613 /* Packet processing callback. This is used to send and receive packets
614 from network. This is generic task. */
616 SILC_TASK_CALLBACK_GLOBAL(silc_client_packet_process)
618 SilcClient client = (SilcClient)context;
619 SilcSocketConnection sock = NULL;
620 SilcClientConnection conn;
623 SILC_LOG_DEBUG(("Processing packet"));
625 SILC_CLIENT_GET_SOCK(client, fd, sock);
629 conn = (SilcClientConnection)sock->user_data;
632 if (type == SILC_TASK_WRITE) {
633 SILC_LOG_DEBUG(("Writing data to connection"));
635 if (sock->outbuf->data - sock->outbuf->head)
636 silc_buffer_push(sock->outbuf,
637 sock->outbuf->data - sock->outbuf->head);
639 ret = silc_client_packet_send_real(client, sock, TRUE, TRUE);
641 /* If returned -2 could not write to connection now, will do
646 /* The packet has been sent and now it is time to set the connection
647 back to only for input. When there is again some outgoing data
648 available for this connection it will be set for output as well.
649 This call clears the output setting and sets it only for input. */
650 SILC_CLIENT_SET_CONNECTION_FOR_INPUT(fd);
651 SILC_UNSET_OUTBUF_PENDING(sock);
653 silc_buffer_clear(sock->outbuf);
657 /* Packet receiving */
658 if (type == SILC_TASK_READ) {
659 SILC_LOG_DEBUG(("Reading data from connection"));
661 /* Read data from network */
662 ret = silc_packet_receive(sock);
668 SILC_LOG_DEBUG(("Read EOF"));
670 /* If connection is disconnecting already we will finally
671 close the connection */
672 if (SILC_IS_DISCONNECTING(sock)) {
673 if (sock == conn->sock)
674 client->ops->disconnect(client, conn);
675 silc_client_close_connection(client, sock, conn);
679 SILC_LOG_DEBUG(("EOF from connection %d", sock->sock));
680 if (sock == conn->sock)
681 client->ops->disconnect(client, conn);
682 silc_client_close_connection(client, sock, conn);
686 /* Process the packet. This will call the parser that will then
687 decrypt and parse the packet. */
688 if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
689 silc_packet_receive_process(sock, conn->receive_key, conn->hmac,
690 silc_client_packet_parse, client);
692 silc_packet_receive_process(sock, NULL, NULL,
693 silc_client_packet_parse, client);
697 /* Callback function that the silc_packet_decrypt will call to make the
698 decision whether the packet is normal or special packet. We will
699 return TRUE if it is normal and FALSE if it is special */
701 static int silc_client_packet_decrypt_check(SilcPacketType packet_type,
703 SilcPacketContext *packet,
707 /* Packet is normal packet, if:
709 1) packet is private message packet and does not have private key set
710 2) is other packet than channel message packet
712 all other packets are special packets
715 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
716 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
719 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE)
725 /* Parses whole packet, received earlier. */
727 SILC_TASK_CALLBACK(silc_client_packet_parse_real)
729 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
730 SilcClient client = (SilcClient)parse_ctx->context;
731 SilcPacketContext *packet = parse_ctx->packet;
732 SilcBuffer buffer = packet->buffer;
733 SilcSocketConnection sock = parse_ctx->sock;
734 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
737 SILC_LOG_DEBUG(("Start"));
739 /* Decrypt the received packet */
740 if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
741 ret = silc_packet_decrypt(conn->receive_key, conn->hmac, buffer, packet,
742 silc_client_packet_decrypt_check, parse_ctx);
744 ret = silc_packet_decrypt(NULL, NULL, buffer, packet,
745 silc_client_packet_decrypt_check, parse_ctx);
751 /* Parse the packet. Packet type is returned. */
752 ret = silc_packet_parse(packet);
754 /* Parse the packet header in special way as this is "special"
756 ret = silc_packet_parse_special(packet);
759 if (ret == SILC_PACKET_NONE)
762 /* Parse the incoming packet type */
763 silc_client_packet_parse_type(client, sock, packet);
766 /* silc_buffer_clear(sock->inbuf); */
767 silc_packet_context_free(packet);
768 silc_free(parse_ctx);
771 /* Parser callback called by silc_packet_receive_process. Thie merely
772 registers timeout that will handle the actual parsing when appropriate. */
774 void silc_client_packet_parse(SilcPacketParserContext *parser_context)
776 SilcClient client = (SilcClient)parser_context->context;
778 /* Parse the packet */
779 silc_task_register(client->timeout_queue, parser_context->sock->sock,
780 silc_client_packet_parse_real,
781 (void *)parser_context, 0, 1,
783 SILC_TASK_PRI_NORMAL);
786 /* Parses the packet type and calls what ever routines the packet type
787 requires. This is done for all incoming packets. */
789 void silc_client_packet_parse_type(SilcClient client,
790 SilcSocketConnection sock,
791 SilcPacketContext *packet)
793 SilcBuffer buffer = packet->buffer;
794 SilcPacketType type = packet->type;
796 SILC_LOG_DEBUG(("Parsing packet type %d", type));
798 /* Parse the packet type */
800 case SILC_PACKET_DISCONNECT:
801 silc_client_disconnected_by_server(client, sock, buffer);
803 case SILC_PACKET_SUCCESS:
805 * Success received for something. For now we can have only
806 * one protocol for connection executing at once hence this
807 * success message is for whatever protocol is executing currently.
809 if (sock->protocol) {
810 sock->protocol->execute(client->timeout_queue, 0,
811 sock->protocol, sock->sock, 0, 0);
814 case SILC_PACKET_FAILURE:
816 * Failure received for some protocol. Set the protocol state to
817 * error and call the protocol callback. This fill cause error on
818 * protocol and it will call the final callback.
820 silc_client_process_failure(client, sock, packet);
822 case SILC_PACKET_REJECT:
825 case SILC_PACKET_NOTIFY:
827 * Received notify message
829 silc_client_notify_by_server(client, sock, packet);
832 case SILC_PACKET_ERROR:
834 * Received error message
836 silc_client_error_by_server(client, sock, buffer);
839 case SILC_PACKET_CHANNEL_MESSAGE:
841 * Received message to (from, actually) a channel
843 silc_client_channel_message(client, sock, packet);
845 case SILC_PACKET_CHANNEL_KEY:
847 * Received key for a channel. By receiving this key the client will be
848 * able to talk to the channel it has just joined. This can also be
849 * a new key for existing channel as keys expire peridiocally.
851 silc_client_receive_channel_key(client, sock, buffer);
854 case SILC_PACKET_PRIVATE_MESSAGE:
856 * Received private message
858 silc_client_private_message(client, sock, packet);
860 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
862 * Received private message key
866 case SILC_PACKET_COMMAND_REPLY:
868 * Recived reply for a command
870 silc_client_command_reply_process(client, sock, packet);
873 case SILC_PACKET_KEY_EXCHANGE:
874 if (sock->protocol && sock->protocol->protocol &&
875 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE) {
876 SilcClientKEInternalContext *proto_ctx =
877 (SilcClientKEInternalContext *)sock->protocol->context;
879 proto_ctx->packet = silc_packet_context_dup(packet);
880 proto_ctx->dest_id_type = packet->src_id_type;
881 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
882 packet->src_id_type);
883 if (!proto_ctx->dest_id)
886 /* Let the protocol handle the packet */
887 sock->protocol->execute(client->timeout_queue, 0,
888 sock->protocol, sock->sock, 0, 0);
890 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
891 "protocol active, packet dropped."));
893 /* XXX Trigger KE protocol?? Rekey actually! */
897 case SILC_PACKET_KEY_EXCHANGE_1:
898 if (sock->protocol && sock->protocol->protocol &&
899 (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
900 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
902 if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
903 SilcClientRekeyInternalContext *proto_ctx =
904 (SilcClientRekeyInternalContext *)sock->protocol->context;
906 if (proto_ctx->packet)
907 silc_packet_context_free(proto_ctx->packet);
909 proto_ctx->packet = silc_packet_context_dup(packet);
911 /* Let the protocol handle the packet */
912 sock->protocol->execute(client->timeout_queue, 0,
913 sock->protocol, sock->sock, 0, 0);
915 SilcClientKEInternalContext *proto_ctx =
916 (SilcClientKEInternalContext *)sock->protocol->context;
918 if (proto_ctx->packet)
919 silc_packet_context_free(proto_ctx->packet);
921 proto_ctx->packet = silc_packet_context_dup(packet);
922 proto_ctx->dest_id_type = packet->src_id_type;
923 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
924 packet->src_id_type);
925 if (!proto_ctx->dest_id)
928 /* Let the protocol handle the packet */
929 sock->protocol->execute(client->timeout_queue, 0,
930 sock->protocol, sock->sock, 0, 0);
933 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
934 "protocol active, packet dropped."));
937 case SILC_PACKET_KEY_EXCHANGE_2:
938 if (sock->protocol && sock->protocol->protocol &&
939 (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
940 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
942 if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
943 SilcClientRekeyInternalContext *proto_ctx =
944 (SilcClientRekeyInternalContext *)sock->protocol->context;
946 if (proto_ctx->packet)
947 silc_packet_context_free(proto_ctx->packet);
949 proto_ctx->packet = silc_packet_context_dup(packet);
951 /* Let the protocol handle the packet */
952 sock->protocol->execute(client->timeout_queue, 0,
953 sock->protocol, sock->sock, 0, 0);
955 SilcClientKEInternalContext *proto_ctx =
956 (SilcClientKEInternalContext *)sock->protocol->context;
958 if (proto_ctx->packet)
959 silc_packet_context_free(proto_ctx->packet);
961 proto_ctx->packet = silc_packet_context_dup(packet);
962 proto_ctx->dest_id_type = packet->src_id_type;
963 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
964 packet->src_id_type);
965 if (!proto_ctx->dest_id)
968 /* Let the protocol handle the packet */
969 sock->protocol->execute(client->timeout_queue, 0,
970 sock->protocol, sock->sock, 0, 0);
973 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
974 "protocol active, packet dropped."));
978 case SILC_PACKET_NEW_ID:
981 * Received new ID from server. This packet is received at
982 * the connection to the server. New ID is also received when
983 * user changes nickname but in that case the new ID is received
984 * as command reply and not as this packet type.
988 idp = silc_id_payload_parse(buffer);
991 if (silc_id_payload_get_type(idp) != SILC_ID_CLIENT)
994 silc_client_receive_new_id(client, sock, idp);
995 silc_id_payload_free(idp);
999 case SILC_PACKET_HEARTBEAT:
1001 * Received heartbeat packet
1003 SILC_LOG_DEBUG(("Heartbeat packet"));
1006 case SILC_PACKET_KEY_AGREEMENT:
1008 * Received key agreement packet
1010 SILC_LOG_DEBUG(("Key agreement packet"));
1011 silc_client_key_agreement(client, sock, packet);
1014 case SILC_PACKET_REKEY:
1015 SILC_LOG_DEBUG(("Re-key packet"));
1016 /* We ignore this for now */
1019 case SILC_PACKET_REKEY_DONE:
1020 SILC_LOG_DEBUG(("Re-key done packet"));
1022 if (sock->protocol && sock->protocol->protocol &&
1023 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
1025 SilcClientRekeyInternalContext *proto_ctx =
1026 (SilcClientRekeyInternalContext *)sock->protocol->context;
1028 if (proto_ctx->packet)
1029 silc_packet_context_free(proto_ctx->packet);
1031 proto_ctx->packet = silc_packet_context_dup(packet);
1033 /* Let the protocol handle the packet */
1034 sock->protocol->execute(client->timeout_queue, 0,
1035 sock->protocol, sock->sock, 0, 100000);
1037 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1038 "protocol active, packet dropped."));
1043 SILC_LOG_DEBUG(("Incorrect packet type %d, packet dropped", type));
1048 /* Sends packet. This doesn't actually send the packet instead it assembles
1049 it and marks it to be sent. However, if force_send is TRUE the packet
1050 is sent immediately. if dst_id, cipher and hmac are NULL those parameters
1051 will be derived from sock argument. Otherwise the valid arguments sent
1054 void silc_client_packet_send(SilcClient client,
1055 SilcSocketConnection sock,
1056 SilcPacketType type,
1058 SilcIdType dst_id_type,
1061 unsigned char *data,
1065 SilcPacketContext packetdata;
1067 SILC_LOG_DEBUG(("Sending packet, type %d", type));
1069 /* Get data used in the packet sending, keys and stuff */
1070 if ((!cipher || !hmac || !dst_id) && sock->user_data) {
1071 if (!cipher && ((SilcClientConnection)sock->user_data)->send_key)
1072 cipher = ((SilcClientConnection)sock->user_data)->send_key;
1074 if (!hmac && ((SilcClientConnection)sock->user_data)->hmac)
1075 hmac = ((SilcClientConnection)sock->user_data)->hmac;
1077 if (!dst_id && ((SilcClientConnection)sock->user_data)->remote_id) {
1078 dst_id = ((SilcClientConnection)sock->user_data)->remote_id;
1079 dst_id_type = SILC_ID_SERVER;
1083 /* Set the packet context pointers */
1084 packetdata.flags = 0;
1085 packetdata.type = type;
1086 if (sock->user_data &&
1087 ((SilcClientConnection)sock->user_data)->local_id_data)
1088 packetdata.src_id = ((SilcClientConnection)sock->user_data)->local_id_data;
1090 packetdata.src_id = silc_calloc(SILC_ID_CLIENT_LEN, sizeof(unsigned char));
1091 packetdata.src_id_len = SILC_ID_CLIENT_LEN;
1092 packetdata.src_id_type = SILC_ID_CLIENT;
1094 packetdata.dst_id = silc_id_id2str(dst_id, dst_id_type);
1095 packetdata.dst_id_len = silc_id_get_len(dst_id_type);
1096 packetdata.dst_id_type = dst_id_type;
1098 packetdata.dst_id = NULL;
1099 packetdata.dst_id_len = 0;
1100 packetdata.dst_id_type = SILC_ID_NONE;
1102 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1103 packetdata.src_id_len + packetdata.dst_id_len;
1104 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1106 /* Prepare outgoing data buffer for packet sending */
1107 silc_packet_send_prepare(sock,
1108 SILC_PACKET_HEADER_LEN +
1109 packetdata.src_id_len +
1110 packetdata.dst_id_len,
1114 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
1116 packetdata.buffer = sock->outbuf;
1118 /* Put the data to the buffer */
1119 if (data && data_len)
1120 silc_buffer_put(sock->outbuf, data, data_len);
1122 /* Create the outgoing packet */
1123 silc_packet_assemble(&packetdata);
1125 /* Encrypt the packet */
1127 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1129 SILC_LOG_HEXDUMP(("Packet, len %d", sock->outbuf->len),
1130 sock->outbuf->data, sock->outbuf->len);
1132 /* Now actually send the packet */
1133 silc_client_packet_send_real(client, sock, force_send, FALSE);
1136 /* Closes connection to remote end. Free's all allocated data except
1137 for some information such as nickname etc. that are valid at all time.
1138 If the `sock' is NULL then the conn->sock will be used. If `sock' is
1139 provided it will be checked whether the sock and `conn->sock' are the
1140 same (they can be different, ie. a socket can use `conn' as its
1141 connection but `conn->sock' might be actually a different connection
1142 than the `sock'). */
1144 void silc_client_close_connection(SilcClient client,
1145 SilcSocketConnection sock,
1146 SilcClientConnection conn)
1150 if (!sock || (sock && conn->sock == sock))
1155 /* We won't listen for this connection anymore */
1156 silc_schedule_unset_listen_fd(sock->sock);
1158 /* Unregister all tasks */
1159 silc_task_unregister_by_fd(client->io_queue, sock->sock);
1160 silc_task_unregister_by_fd(client->timeout_queue, sock->sock);
1162 /* Close the actual connection */
1163 silc_net_close_connection(sock->sock);
1165 /* Free everything */
1166 if (del && sock->user_data) {
1167 /* XXX Free all client entries and channel entries. */
1169 client->ops->say(client, sock->user_data,
1170 "Closed connection to host %s", sock->hostname);
1172 /* Clear ID caches */
1173 silc_idcache_del_all(conn->client_cache);
1174 silc_idcache_del_all(conn->channel_cache);
1177 if (conn->remote_host)
1178 silc_free(conn->remote_host);
1180 silc_free(conn->local_id);
1181 if (conn->local_id_data)
1182 silc_free(conn->local_id_data);
1184 silc_cipher_free(conn->send_key);
1185 if (conn->receive_key)
1186 silc_cipher_free(conn->receive_key);
1188 silc_hmac_free(conn->hmac);
1189 if (conn->pending_commands)
1190 silc_dlist_uninit(conn->pending_commands);
1192 silc_free(conn->rekey);
1195 conn->remote_port = 0;
1196 conn->remote_type = 0;
1197 conn->send_key = NULL;
1198 conn->receive_key = NULL;
1200 conn->local_id = NULL;
1201 conn->local_id_data = NULL;
1202 conn->remote_host = NULL;
1203 conn->current_channel = NULL;
1204 conn->pending_commands = NULL;
1207 silc_client_del_connection(client, conn);
1210 if (sock->protocol) {
1211 silc_protocol_free(sock->protocol);
1212 sock->protocol = NULL;
1214 silc_socket_free(sock);
1217 /* Called when we receive disconnection packet from server. This
1218 closes our end properly and displays the reason of the disconnection
1221 void silc_client_disconnected_by_server(SilcClient client,
1222 SilcSocketConnection sock,
1227 SILC_LOG_DEBUG(("Server disconnected us, sock %d", sock->sock));
1229 msg = silc_calloc(message->len + 1, sizeof(char));
1230 memcpy(msg, message->data, message->len);
1231 client->ops->say(client, sock->user_data, msg);
1234 SILC_SET_DISCONNECTED(sock);
1235 silc_client_close_connection(client, sock, sock->user_data);
1238 /* Received error message from server. Display it on the screen.
1239 We don't take any action what so ever of the error message. */
1241 void silc_client_error_by_server(SilcClient client,
1242 SilcSocketConnection sock,
1247 msg = silc_calloc(message->len + 1, sizeof(char));
1248 memcpy(msg, message->data, message->len);
1249 client->ops->say(client, sock->user_data, msg);
1253 /* Processes the received new Client ID from server. Old Client ID is
1254 deleted from cache and new one is added. */
1256 void silc_client_receive_new_id(SilcClient client,
1257 SilcSocketConnection sock,
1260 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1261 int connecting = FALSE;
1263 if (!conn->local_entry)
1266 /* Delete old ID from ID cache */
1267 silc_idcache_del_by_id(conn->client_cache, SILC_ID_CLIENT, conn->local_id);
1269 /* Save the new ID */
1271 silc_free(conn->local_id);
1272 if (conn->local_id_data)
1273 silc_free(conn->local_id_data);
1275 conn->local_id = silc_id_payload_get_id(idp);
1276 conn->local_id_data = silc_id_payload_get_data(idp);
1277 conn->local_id_data_len = silc_id_payload_get_len(idp);;
1279 if (!conn->local_entry)
1280 conn->local_entry = silc_calloc(1, sizeof(*conn->local_entry));
1282 conn->local_entry->nickname = conn->nickname;
1283 if (!conn->local_entry->username) {
1284 conn->local_entry->username =
1285 silc_calloc(strlen(client->username) + strlen(client->hostname) + 1,
1286 sizeof(conn->local_entry->username));
1287 sprintf(conn->local_entry->username, "%s@%s", client->username,
1290 conn->local_entry->server = strdup(conn->remote_host);
1291 conn->local_entry->id = conn->local_id;
1293 /* Put it to the ID cache */
1294 silc_idcache_add(conn->client_cache, conn->nickname, strlen(conn->nickname),
1295 SILC_ID_CLIENT, conn->local_id, (void *)conn->local_entry,
1298 /* Notify application of successful connection. We do it here now that
1299 we've received the Client ID and are allowed to send traffic. */
1301 client->ops->connect(client, conn, TRUE);
1304 /* Processed received Channel ID for a channel. This is called when client
1305 joins to channel and server replies with channel ID. The ID is cached.
1306 Returns the created channel entry. */
1308 SilcChannelEntry silc_client_new_channel_id(SilcClient client,
1309 SilcSocketConnection sock,
1314 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1315 SilcChannelEntry channel;
1317 SILC_LOG_DEBUG(("New channel ID"));
1319 channel = silc_calloc(1, sizeof(*channel));
1320 channel->channel_name = channel_name;
1321 channel->id = silc_id_payload_get_id(idp);
1322 channel->mode = mode;
1323 silc_list_init(channel->clients, struct SilcChannelUserStruct, next);
1325 conn->current_channel = channel;
1327 /* Put it to the ID cache */
1328 silc_idcache_add(conn->channel_cache, channel_name, strlen(channel_name),
1329 SILC_ID_CHANNEL, (void *)channel->id, (void *)channel,
1335 /* Removes a client entry from all channel it has joined. This really is
1336 a performance killer (client_entry should have pointers to channel
1339 void silc_client_remove_from_channels(SilcClient client,
1340 SilcClientConnection conn,
1341 SilcClientEntry client_entry)
1343 SilcIDCacheEntry id_cache;
1344 SilcIDCacheList list;
1345 SilcChannelEntry channel;
1346 SilcChannelUser chu;
1348 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
1349 SILC_ID_CHANNEL, &list))
1352 silc_idcache_list_first(list, &id_cache);
1353 channel = (SilcChannelEntry)id_cache->context;
1357 /* Remove client from channel */
1358 silc_list_start(channel->clients);
1359 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1360 if (chu->client == client_entry) {
1361 silc_list_del(channel->clients, chu);
1367 if (!silc_idcache_list_next(list, &id_cache))
1370 channel = (SilcChannelEntry)id_cache->context;
1373 silc_idcache_list_free(list);
1376 /* Replaces `old' client entries from all channels to `new' client entry.
1377 This can be called for example when nickname changes and old ID entry
1378 is replaced from ID cache with the new one. If the old ID entry is only
1379 updated, then this fucntion needs not to be called. */
1381 void silc_client_replace_from_channels(SilcClient client,
1382 SilcClientConnection conn,
1383 SilcClientEntry old,
1384 SilcClientEntry new)
1386 SilcIDCacheEntry id_cache;
1387 SilcIDCacheList list;
1388 SilcChannelEntry channel;
1389 SilcChannelUser chu;
1391 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
1392 SILC_ID_CHANNEL, &list))
1395 silc_idcache_list_first(list, &id_cache);
1396 channel = (SilcChannelEntry)id_cache->context;
1400 /* Replace client entry */
1401 silc_list_start(channel->clients);
1402 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1403 if (chu->client == old) {
1409 if (!silc_idcache_list_next(list, &id_cache))
1412 channel = (SilcChannelEntry)id_cache->context;
1415 silc_idcache_list_free(list);
1418 /* Parses mode mask and returns the mode as string. */
1420 char *silc_client_chmode(uint32 mode, SilcChannelEntry channel)
1427 memset(string, 0, sizeof(string));
1429 if (mode & SILC_CHANNEL_MODE_PRIVATE)
1430 strncat(string, "p", 1);
1432 if (mode & SILC_CHANNEL_MODE_SECRET)
1433 strncat(string, "s", 1);
1435 if (mode & SILC_CHANNEL_MODE_PRIVKEY)
1436 strncat(string, "k", 1);
1438 if (mode & SILC_CHANNEL_MODE_INVITE)
1439 strncat(string, "i", 1);
1441 if (mode & SILC_CHANNEL_MODE_TOPIC)
1442 strncat(string, "t", 1);
1444 if (mode & SILC_CHANNEL_MODE_ULIMIT)
1445 strncat(string, "l", 1);
1447 if (mode & SILC_CHANNEL_MODE_PASSPHRASE)
1448 strncat(string, "a", 1);
1450 if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)
1451 strncat(string, "f", 1);
1453 if (mode & SILC_CHANNEL_MODE_CIPHER) {
1455 memset(cipher, 0, sizeof(cipher));
1456 snprintf(cipher, sizeof(cipher), " c (%s)",
1457 channel->channel_key->cipher->name);
1458 strncat(string, cipher, strlen(cipher));
1461 if (mode & SILC_CHANNEL_MODE_HMAC) {
1463 memset(hmac, 0, sizeof(hmac));
1464 snprintf(hmac, sizeof(hmac), " h (%s)",
1465 channel->hmac->hmac->name);
1466 strncat(string, hmac, strlen(hmac));
1469 /* Rest of mode is ignored */
1471 return strdup(string);
1474 /* Parses channel user mode mask and returns te mode as string */
1476 char *silc_client_chumode(uint32 mode)
1483 memset(string, 0, sizeof(string));
1485 if (mode & SILC_CHANNEL_UMODE_CHANFO)
1486 strncat(string, "f", 1);
1488 if (mode & SILC_CHANNEL_UMODE_CHANOP)
1489 strncat(string, "o", 1);
1491 return strdup(string);
1494 /* Parses channel user mode and returns it as special mode character. */
1496 char *silc_client_chumode_char(uint32 mode)
1503 memset(string, 0, sizeof(string));
1505 if (mode & SILC_CHANNEL_UMODE_CHANFO)
1506 strncat(string, "*", 1);
1508 if (mode & SILC_CHANNEL_UMODE_CHANOP)
1509 strncat(string, "@", 1);
1511 return strdup(string);
1514 /* Failure timeout callback. If this is called then we will immediately
1515 process the received failure. We always process the failure with timeout
1516 since we do not want to blindly trust to received failure packets.
1517 This won't be called (the timeout is cancelled) if the failure was
1518 bogus (it is bogus if remote does not close the connection after sending
1521 SILC_TASK_CALLBACK_GLOBAL(silc_client_failure_callback)
1523 SilcClientFailureContext *f = (SilcClientFailureContext *)context;
1525 if (f->sock->protocol) {
1526 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1527 f->sock->protocol->execute(f->client->timeout_queue, 0,
1528 f->sock->protocol, f->sock->sock, 0, 0);
1530 /* Notify application */
1531 f->client->ops->failure(f->client, f->sock->user_data, f->sock->protocol,
1532 (void *)f->failure);
1538 /* Registers failure timeout to process the received failure packet
1541 void silc_client_process_failure(SilcClient client,
1542 SilcSocketConnection sock,
1543 SilcPacketContext *packet)
1545 SilcClientFailureContext *f;
1548 if (sock->protocol) {
1549 if (packet->buffer->len >= 4)
1550 SILC_GET32_MSB(failure, packet->buffer->data);
1552 f = silc_calloc(1, sizeof(*f));
1555 f->failure = failure;
1557 /* We will wait 5 seconds to process this failure packet */
1558 silc_task_register(client->timeout_queue, sock->sock,
1559 silc_client_failure_callback, (void *)f, 5, 0,
1560 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1564 /* A timeout callback for the re-key. We will be the initiator of the
1567 SILC_TASK_CALLBACK(silc_client_rekey_callback)
1569 SilcSocketConnection sock = (SilcSocketConnection)context;
1570 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1571 SilcClient client = (SilcClient)conn->rekey->context;
1572 SilcProtocol protocol;
1573 SilcClientRekeyInternalContext *proto_ctx;
1575 SILC_LOG_DEBUG(("Start"));
1577 /* Allocate internal protocol context. This is sent as context
1579 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1580 proto_ctx->client = (void *)client;
1581 proto_ctx->sock = sock;
1582 proto_ctx->responder = FALSE;
1583 proto_ctx->pfs = conn->rekey->pfs;
1585 /* Perform rekey protocol. Will call the final callback after the
1586 protocol is over. */
1587 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_REKEY,
1588 &protocol, proto_ctx, silc_client_rekey_final);
1589 sock->protocol = protocol;
1591 /* Run the protocol */
1592 protocol->execute(client->timeout_queue, 0, protocol,
1595 /* Re-register re-key timeout */
1596 silc_task_register(client->timeout_queue, sock->sock,
1597 silc_client_rekey_callback,
1598 context, conn->rekey->timeout, 0,
1599 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1602 /* The final callback for the REKEY protocol. This will actually take the
1603 new key material into use. */
1605 SILC_TASK_CALLBACK(silc_client_rekey_final)
1607 SilcProtocol protocol = (SilcProtocol)context;
1608 SilcClientRekeyInternalContext *ctx =
1609 (SilcClientRekeyInternalContext *)protocol->context;
1610 SilcClient client = (SilcClient)ctx->client;
1611 SilcSocketConnection sock = ctx->sock;
1613 SILC_LOG_DEBUG(("Start"));
1615 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1616 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1617 /* Error occured during protocol */
1618 silc_protocol_cancel(client->timeout_queue, protocol);
1619 silc_protocol_free(protocol);
1620 sock->protocol = NULL;
1622 silc_packet_context_free(ctx->packet);
1624 silc_ske_free(ctx->ske);
1629 /* Take the keys into use */
1630 if (ctx->pfs == TRUE)
1631 silc_client_protocol_rekey_generate_pfs(client, ctx);
1633 silc_client_protocol_rekey_generate(client, ctx);
1636 silc_protocol_free(protocol);
1637 sock->protocol = NULL;
1639 silc_packet_context_free(ctx->packet);
1641 silc_ske_free(ctx->ske);