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 /* If rekey protocol is active we must assure that all packets are
589 sent through packet queue. */
590 if (SILC_CLIENT_IS_REKEY(sock))
593 /* Send the packet */
594 ret = silc_packet_send(sock, force_send);
598 /* Mark that there is some outgoing data available for this connection.
599 This call sets the connection both for input and output (the input
600 is set always and this call keeps the input setting, actually).
601 Actual data sending is performed by silc_client_packet_process. */
602 SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(sock->sock);
604 /* Mark to socket that data is pending in outgoing buffer. This flag
605 is needed if new data is added to the buffer before the earlier
606 put data is sent to the network. */
607 SILC_SET_OUTBUF_PENDING(sock);
612 /* Packet processing callback. This is used to send and receive packets
613 from network. This is generic task. */
615 SILC_TASK_CALLBACK_GLOBAL(silc_client_packet_process)
617 SilcClient client = (SilcClient)context;
618 SilcSocketConnection sock = NULL;
619 SilcClientConnection conn;
622 SILC_LOG_DEBUG(("Processing packet"));
624 SILC_CLIENT_GET_SOCK(client, fd, sock);
628 conn = (SilcClientConnection)sock->user_data;
631 if (type == SILC_TASK_WRITE) {
632 SILC_LOG_DEBUG(("Writing data to connection"));
634 if (sock->outbuf->data - sock->outbuf->head)
635 silc_buffer_push(sock->outbuf,
636 sock->outbuf->data - sock->outbuf->head);
638 ret = silc_client_packet_send_real(client, sock, TRUE);
640 /* If returned -2 could not write to connection now, will do
645 /* The packet has been sent and now it is time to set the connection
646 back to only for input. When there is again some outgoing data
647 available for this connection it will be set for output as well.
648 This call clears the output setting and sets it only for input. */
649 SILC_CLIENT_SET_CONNECTION_FOR_INPUT(fd);
650 SILC_UNSET_OUTBUF_PENDING(sock);
652 silc_buffer_clear(sock->outbuf);
656 /* Packet receiving */
657 if (type == SILC_TASK_READ) {
658 SILC_LOG_DEBUG(("Reading data from connection"));
660 /* Read data from network */
661 ret = silc_packet_receive(sock);
667 SILC_LOG_DEBUG(("Read EOF"));
669 /* If connection is disconnecting already we will finally
670 close the connection */
671 if (SILC_IS_DISCONNECTING(sock)) {
672 if (sock == conn->sock)
673 client->ops->disconnect(client, conn);
674 silc_client_close_connection(client, sock, conn);
678 SILC_LOG_DEBUG(("EOF from connection %d", sock->sock));
679 if (sock == conn->sock)
680 client->ops->disconnect(client, conn);
681 silc_client_close_connection(client, sock, conn);
685 /* Process the packet. This will call the parser that will then
686 decrypt and parse the packet. */
687 if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
688 silc_packet_receive_process(sock, conn->receive_key, conn->hmac,
689 silc_client_packet_parse, client);
691 silc_packet_receive_process(sock, NULL, NULL,
692 silc_client_packet_parse, client);
696 /* Callback function that the silc_packet_decrypt will call to make the
697 decision whether the packet is normal or special packet. We will
698 return TRUE if it is normal and FALSE if it is special */
700 static int silc_client_packet_decrypt_check(SilcPacketType packet_type,
702 SilcPacketContext *packet,
706 /* Packet is normal packet, if:
708 1) packet is private message packet and does not have private key set
709 2) is other packet than channel message packet
711 all other packets are special packets
714 if (packet_type == SILC_PACKET_PRIVATE_MESSAGE &&
715 (buffer->data[2] & SILC_PACKET_FLAG_PRIVMSG_KEY))
718 if (packet_type != SILC_PACKET_CHANNEL_MESSAGE)
724 /* Parses whole packet, received earlier. */
726 SILC_TASK_CALLBACK(silc_client_packet_parse_real)
728 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
729 SilcClient client = (SilcClient)parse_ctx->context;
730 SilcPacketContext *packet = parse_ctx->packet;
731 SilcBuffer buffer = packet->buffer;
732 SilcSocketConnection sock = parse_ctx->sock;
733 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
736 SILC_LOG_DEBUG(("Start"));
738 /* Decrypt the received packet */
739 if (sock->type != SILC_SOCKET_TYPE_UNKNOWN)
740 ret = silc_packet_decrypt(conn->receive_key, conn->hmac, buffer, packet,
741 silc_client_packet_decrypt_check, parse_ctx);
743 ret = silc_packet_decrypt(NULL, NULL, buffer, packet,
744 silc_client_packet_decrypt_check, parse_ctx);
750 /* Parse the packet. Packet type is returned. */
751 ret = silc_packet_parse(packet);
753 /* Parse the packet header in special way as this is "special"
755 ret = silc_packet_parse_special(packet);
758 if (ret == SILC_PACKET_NONE)
761 /* Parse the incoming packet type */
762 silc_client_packet_parse_type(client, sock, packet);
765 /* silc_buffer_clear(sock->inbuf); */
766 silc_packet_context_free(packet);
767 silc_free(parse_ctx);
770 /* Parser callback called by silc_packet_receive_process. Thie merely
771 registers timeout that will handle the actual parsing when appropriate. */
773 void silc_client_packet_parse(SilcPacketParserContext *parser_context)
775 SilcClient client = (SilcClient)parser_context->context;
777 /* Parse the packet */
778 silc_task_register(client->timeout_queue, parser_context->sock->sock,
779 silc_client_packet_parse_real,
780 (void *)parser_context, 0, 1,
782 SILC_TASK_PRI_NORMAL);
785 /* Parses the packet type and calls what ever routines the packet type
786 requires. This is done for all incoming packets. */
788 void silc_client_packet_parse_type(SilcClient client,
789 SilcSocketConnection sock,
790 SilcPacketContext *packet)
792 SilcBuffer buffer = packet->buffer;
793 SilcPacketType type = packet->type;
795 SILC_LOG_DEBUG(("Parsing packet type %d", type));
797 /* Parse the packet type */
799 case SILC_PACKET_DISCONNECT:
800 silc_client_disconnected_by_server(client, sock, buffer);
802 case SILC_PACKET_SUCCESS:
804 * Success received for something. For now we can have only
805 * one protocol for connection executing at once hence this
806 * success message is for whatever protocol is executing currently.
808 if (sock->protocol) {
809 sock->protocol->execute(client->timeout_queue, 0,
810 sock->protocol, sock->sock, 0, 0);
813 case SILC_PACKET_FAILURE:
815 * Failure received for some protocol. Set the protocol state to
816 * error and call the protocol callback. This fill cause error on
817 * protocol and it will call the final callback.
819 silc_client_process_failure(client, sock, packet);
821 case SILC_PACKET_REJECT:
824 case SILC_PACKET_NOTIFY:
826 * Received notify message
828 silc_client_notify_by_server(client, sock, packet);
831 case SILC_PACKET_ERROR:
833 * Received error message
835 silc_client_error_by_server(client, sock, buffer);
838 case SILC_PACKET_CHANNEL_MESSAGE:
840 * Received message to (from, actually) a channel
842 silc_client_channel_message(client, sock, packet);
844 case SILC_PACKET_CHANNEL_KEY:
846 * Received key for a channel. By receiving this key the client will be
847 * able to talk to the channel it has just joined. This can also be
848 * a new key for existing channel as keys expire peridiocally.
850 silc_client_receive_channel_key(client, sock, buffer);
853 case SILC_PACKET_PRIVATE_MESSAGE:
855 * Received private message
857 silc_client_private_message(client, sock, packet);
859 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
861 * Received private message key
865 case SILC_PACKET_COMMAND_REPLY:
867 * Recived reply for a command
869 silc_client_command_reply_process(client, sock, packet);
872 case SILC_PACKET_KEY_EXCHANGE:
873 if (sock->protocol && sock->protocol->protocol &&
874 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE) {
875 SilcClientKEInternalContext *proto_ctx =
876 (SilcClientKEInternalContext *)sock->protocol->context;
878 proto_ctx->packet = silc_packet_context_dup(packet);
879 proto_ctx->dest_id_type = packet->src_id_type;
880 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
881 packet->src_id_type);
882 if (!proto_ctx->dest_id)
885 /* Let the protocol handle the packet */
886 sock->protocol->execute(client->timeout_queue, 0,
887 sock->protocol, sock->sock, 0, 0);
889 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
890 "protocol active, packet dropped."));
892 /* XXX Trigger KE protocol?? Rekey actually! */
896 case SILC_PACKET_KEY_EXCHANGE_1:
897 if (sock->protocol && sock->protocol->protocol &&
898 (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
899 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
901 if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
902 SilcClientRekeyInternalContext *proto_ctx =
903 (SilcClientRekeyInternalContext *)sock->protocol->context;
905 if (proto_ctx->packet)
906 silc_packet_context_free(proto_ctx->packet);
908 proto_ctx->packet = silc_packet_context_dup(packet);
910 /* Let the protocol handle the packet */
911 sock->protocol->execute(client->timeout_queue, 0,
912 sock->protocol, sock->sock, 0, 0);
914 SilcClientKEInternalContext *proto_ctx =
915 (SilcClientKEInternalContext *)sock->protocol->context;
917 if (proto_ctx->packet)
918 silc_packet_context_free(proto_ctx->packet);
920 proto_ctx->packet = silc_packet_context_dup(packet);
921 proto_ctx->dest_id_type = packet->src_id_type;
922 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
923 packet->src_id_type);
924 if (!proto_ctx->dest_id)
927 /* Let the protocol handle the packet */
928 sock->protocol->execute(client->timeout_queue, 0,
929 sock->protocol, sock->sock, 0, 0);
932 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
933 "protocol active, packet dropped."));
936 case SILC_PACKET_KEY_EXCHANGE_2:
937 if (sock->protocol && sock->protocol->protocol &&
938 (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_KEY_EXCHANGE ||
939 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY)) {
941 if (sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
942 SilcClientRekeyInternalContext *proto_ctx =
943 (SilcClientRekeyInternalContext *)sock->protocol->context;
945 if (proto_ctx->packet)
946 silc_packet_context_free(proto_ctx->packet);
948 proto_ctx->packet = silc_packet_context_dup(packet);
950 /* Let the protocol handle the packet */
951 sock->protocol->execute(client->timeout_queue, 0,
952 sock->protocol, sock->sock, 0, 0);
954 SilcClientKEInternalContext *proto_ctx =
955 (SilcClientKEInternalContext *)sock->protocol->context;
957 if (proto_ctx->packet)
958 silc_packet_context_free(proto_ctx->packet);
960 proto_ctx->packet = silc_packet_context_dup(packet);
961 proto_ctx->dest_id_type = packet->src_id_type;
962 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_len,
963 packet->src_id_type);
964 if (!proto_ctx->dest_id)
967 /* Let the protocol handle the packet */
968 sock->protocol->execute(client->timeout_queue, 0,
969 sock->protocol, sock->sock, 0, 0);
972 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
973 "protocol active, packet dropped."));
977 case SILC_PACKET_NEW_ID:
980 * Received new ID from server. This packet is received at
981 * the connection to the server. New ID is also received when
982 * user changes nickname but in that case the new ID is received
983 * as command reply and not as this packet type.
987 idp = silc_id_payload_parse(buffer);
990 if (silc_id_payload_get_type(idp) != SILC_ID_CLIENT)
993 silc_client_receive_new_id(client, sock, idp);
994 silc_id_payload_free(idp);
998 case SILC_PACKET_HEARTBEAT:
1000 * Received heartbeat packet
1002 SILC_LOG_DEBUG(("Heartbeat packet"));
1005 case SILC_PACKET_KEY_AGREEMENT:
1007 * Received key agreement packet
1009 SILC_LOG_DEBUG(("Key agreement packet"));
1010 silc_client_key_agreement(client, sock, packet);
1013 case SILC_PACKET_REKEY:
1014 SILC_LOG_DEBUG(("Re-key packet"));
1015 /* We ignore this for now */
1018 case SILC_PACKET_REKEY_DONE:
1019 SILC_LOG_DEBUG(("Re-key done packet"));
1021 if (sock->protocol && sock->protocol->protocol &&
1022 sock->protocol->protocol->type == SILC_PROTOCOL_CLIENT_REKEY) {
1024 SilcClientRekeyInternalContext *proto_ctx =
1025 (SilcClientRekeyInternalContext *)sock->protocol->context;
1027 if (proto_ctx->packet)
1028 silc_packet_context_free(proto_ctx->packet);
1030 proto_ctx->packet = silc_packet_context_dup(packet);
1032 /* Let the protocol handle the packet */
1033 sock->protocol->execute(client->timeout_queue, 0,
1034 sock->protocol, sock->sock, 0, 100000);
1036 SILC_LOG_ERROR(("Received Re-key done packet but no re-key "
1037 "protocol active, packet dropped."));
1042 SILC_LOG_DEBUG(("Incorrect packet type %d, packet dropped", type));
1047 /* Sends packet. This doesn't actually send the packet instead it assembles
1048 it and marks it to be sent. However, if force_send is TRUE the packet
1049 is sent immediately. if dst_id, cipher and hmac are NULL those parameters
1050 will be derived from sock argument. Otherwise the valid arguments sent
1053 void silc_client_packet_send(SilcClient client,
1054 SilcSocketConnection sock,
1055 SilcPacketType type,
1057 SilcIdType dst_id_type,
1060 unsigned char *data,
1064 SilcPacketContext packetdata;
1066 SILC_LOG_DEBUG(("Sending packet, type %d", type));
1068 /* Get data used in the packet sending, keys and stuff */
1069 if ((!cipher || !hmac || !dst_id) && sock->user_data) {
1070 if (!cipher && ((SilcClientConnection)sock->user_data)->send_key)
1071 cipher = ((SilcClientConnection)sock->user_data)->send_key;
1073 if (!hmac && ((SilcClientConnection)sock->user_data)->hmac)
1074 hmac = ((SilcClientConnection)sock->user_data)->hmac;
1076 if (!dst_id && ((SilcClientConnection)sock->user_data)->remote_id) {
1077 dst_id = ((SilcClientConnection)sock->user_data)->remote_id;
1078 dst_id_type = SILC_ID_SERVER;
1082 /* Set the packet context pointers */
1083 packetdata.flags = 0;
1084 packetdata.type = type;
1085 if (sock->user_data &&
1086 ((SilcClientConnection)sock->user_data)->local_id_data)
1087 packetdata.src_id = ((SilcClientConnection)sock->user_data)->local_id_data;
1089 packetdata.src_id = silc_calloc(SILC_ID_CLIENT_LEN, sizeof(unsigned char));
1090 packetdata.src_id_len = SILC_ID_CLIENT_LEN;
1091 packetdata.src_id_type = SILC_ID_CLIENT;
1093 packetdata.dst_id = silc_id_id2str(dst_id, dst_id_type);
1094 packetdata.dst_id_len = silc_id_get_len(dst_id_type);
1095 packetdata.dst_id_type = dst_id_type;
1097 packetdata.dst_id = NULL;
1098 packetdata.dst_id_len = 0;
1099 packetdata.dst_id_type = SILC_ID_NONE;
1101 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
1102 packetdata.src_id_len + packetdata.dst_id_len;
1103 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
1105 /* Prepare outgoing data buffer for packet sending */
1106 silc_packet_send_prepare(sock,
1107 SILC_PACKET_HEADER_LEN +
1108 packetdata.src_id_len +
1109 packetdata.dst_id_len,
1113 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
1115 packetdata.buffer = sock->outbuf;
1117 /* Put the data to the buffer */
1118 if (data && data_len)
1119 silc_buffer_put(sock->outbuf, data, data_len);
1121 /* Create the outgoing packet */
1122 silc_packet_assemble(&packetdata);
1124 /* Encrypt the packet */
1126 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
1128 SILC_LOG_HEXDUMP(("Packet, len %d", sock->outbuf->len),
1129 sock->outbuf->data, sock->outbuf->len);
1131 /* Now actually send the packet */
1132 silc_client_packet_send_real(client, sock, force_send);
1135 /* Closes connection to remote end. Free's all allocated data except
1136 for some information such as nickname etc. that are valid at all time.
1137 If the `sock' is NULL then the conn->sock will be used. If `sock' is
1138 provided it will be checked whether the sock and `conn->sock' are the
1139 same (they can be different, ie. a socket can use `conn' as its
1140 connection but `conn->sock' might be actually a different connection
1141 than the `sock'). */
1143 void silc_client_close_connection(SilcClient client,
1144 SilcSocketConnection sock,
1145 SilcClientConnection conn)
1149 if (!sock || (sock && conn->sock == sock))
1154 /* We won't listen for this connection anymore */
1155 silc_schedule_unset_listen_fd(sock->sock);
1157 /* Unregister all tasks */
1158 silc_task_unregister_by_fd(client->io_queue, sock->sock);
1159 silc_task_unregister_by_fd(client->timeout_queue, sock->sock);
1161 /* Close the actual connection */
1162 silc_net_close_connection(sock->sock);
1164 /* Free everything */
1165 if (del && sock->user_data) {
1166 /* XXX Free all client entries and channel entries. */
1168 client->ops->say(client, sock->user_data,
1169 "Closed connection to host %s", sock->hostname);
1171 /* Clear ID caches */
1172 silc_idcache_del_all(conn->client_cache);
1173 silc_idcache_del_all(conn->channel_cache);
1176 if (conn->remote_host)
1177 silc_free(conn->remote_host);
1179 silc_free(conn->local_id);
1180 if (conn->local_id_data)
1181 silc_free(conn->local_id_data);
1183 silc_cipher_free(conn->send_key);
1184 if (conn->receive_key)
1185 silc_cipher_free(conn->receive_key);
1187 silc_hmac_free(conn->hmac);
1188 if (conn->pending_commands)
1189 silc_dlist_uninit(conn->pending_commands);
1191 silc_free(conn->rekey);
1194 conn->remote_port = 0;
1195 conn->remote_type = 0;
1196 conn->send_key = NULL;
1197 conn->receive_key = NULL;
1199 conn->local_id = NULL;
1200 conn->local_id_data = NULL;
1201 conn->remote_host = NULL;
1202 conn->current_channel = NULL;
1203 conn->pending_commands = NULL;
1206 silc_client_del_connection(client, conn);
1209 if (sock->protocol) {
1210 silc_protocol_free(sock->protocol);
1211 sock->protocol = NULL;
1213 silc_socket_free(sock);
1216 /* Called when we receive disconnection packet from server. This
1217 closes our end properly and displays the reason of the disconnection
1220 void silc_client_disconnected_by_server(SilcClient client,
1221 SilcSocketConnection sock,
1226 SILC_LOG_DEBUG(("Server disconnected us, sock %d", sock->sock));
1228 msg = silc_calloc(message->len + 1, sizeof(char));
1229 memcpy(msg, message->data, message->len);
1230 client->ops->say(client, sock->user_data, msg);
1233 SILC_SET_DISCONNECTED(sock);
1234 silc_client_close_connection(client, sock, sock->user_data);
1237 /* Received error message from server. Display it on the screen.
1238 We don't take any action what so ever of the error message. */
1240 void silc_client_error_by_server(SilcClient client,
1241 SilcSocketConnection sock,
1246 msg = silc_calloc(message->len + 1, sizeof(char));
1247 memcpy(msg, message->data, message->len);
1248 client->ops->say(client, sock->user_data, msg);
1252 /* Processes the received new Client ID from server. Old Client ID is
1253 deleted from cache and new one is added. */
1255 void silc_client_receive_new_id(SilcClient client,
1256 SilcSocketConnection sock,
1259 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1260 int connecting = FALSE;
1262 if (!conn->local_entry)
1265 /* Delete old ID from ID cache */
1266 silc_idcache_del_by_id(conn->client_cache, SILC_ID_CLIENT, conn->local_id);
1268 /* Save the new ID */
1270 silc_free(conn->local_id);
1271 if (conn->local_id_data)
1272 silc_free(conn->local_id_data);
1274 conn->local_id = silc_id_payload_get_id(idp);
1275 conn->local_id_data = silc_id_payload_get_data(idp);
1276 conn->local_id_data_len = silc_id_payload_get_len(idp);;
1278 if (!conn->local_entry)
1279 conn->local_entry = silc_calloc(1, sizeof(*conn->local_entry));
1281 conn->local_entry->nickname = conn->nickname;
1282 if (!conn->local_entry->username) {
1283 conn->local_entry->username =
1284 silc_calloc(strlen(client->username) + strlen(client->hostname) + 1,
1285 sizeof(conn->local_entry->username));
1286 sprintf(conn->local_entry->username, "%s@%s", client->username,
1289 conn->local_entry->server = strdup(conn->remote_host);
1290 conn->local_entry->id = conn->local_id;
1292 /* Put it to the ID cache */
1293 silc_idcache_add(conn->client_cache, conn->nickname, strlen(conn->nickname),
1294 SILC_ID_CLIENT, conn->local_id, (void *)conn->local_entry,
1297 /* Notify application of successful connection. We do it here now that
1298 we've received the Client ID and are allowed to send traffic. */
1300 client->ops->connect(client, conn, TRUE);
1303 /* Processed received Channel ID for a channel. This is called when client
1304 joins to channel and server replies with channel ID. The ID is cached.
1305 Returns the created channel entry. */
1307 SilcChannelEntry silc_client_new_channel_id(SilcClient client,
1308 SilcSocketConnection sock,
1313 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1314 SilcChannelEntry channel;
1316 SILC_LOG_DEBUG(("New channel ID"));
1318 channel = silc_calloc(1, sizeof(*channel));
1319 channel->channel_name = channel_name;
1320 channel->id = silc_id_payload_get_id(idp);
1321 channel->mode = mode;
1322 silc_list_init(channel->clients, struct SilcChannelUserStruct, next);
1324 conn->current_channel = channel;
1326 /* Put it to the ID cache */
1327 silc_idcache_add(conn->channel_cache, channel_name, strlen(channel_name),
1328 SILC_ID_CHANNEL, (void *)channel->id, (void *)channel,
1334 /* Removes a client entry from all channel it has joined. This really is
1335 a performance killer (client_entry should have pointers to channel
1338 void silc_client_remove_from_channels(SilcClient client,
1339 SilcClientConnection conn,
1340 SilcClientEntry client_entry)
1342 SilcIDCacheEntry id_cache;
1343 SilcIDCacheList list;
1344 SilcChannelEntry channel;
1345 SilcChannelUser chu;
1347 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
1348 SILC_ID_CHANNEL, &list))
1351 silc_idcache_list_first(list, &id_cache);
1352 channel = (SilcChannelEntry)id_cache->context;
1356 /* Remove client from channel */
1357 silc_list_start(channel->clients);
1358 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1359 if (chu->client == client_entry) {
1360 silc_list_del(channel->clients, chu);
1366 if (!silc_idcache_list_next(list, &id_cache))
1369 channel = (SilcChannelEntry)id_cache->context;
1372 silc_idcache_list_free(list);
1375 /* Replaces `old' client entries from all channels to `new' client entry.
1376 This can be called for example when nickname changes and old ID entry
1377 is replaced from ID cache with the new one. If the old ID entry is only
1378 updated, then this fucntion needs not to be called. */
1380 void silc_client_replace_from_channels(SilcClient client,
1381 SilcClientConnection conn,
1382 SilcClientEntry old,
1383 SilcClientEntry new)
1385 SilcIDCacheEntry id_cache;
1386 SilcIDCacheList list;
1387 SilcChannelEntry channel;
1388 SilcChannelUser chu;
1390 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
1391 SILC_ID_CHANNEL, &list))
1394 silc_idcache_list_first(list, &id_cache);
1395 channel = (SilcChannelEntry)id_cache->context;
1399 /* Replace client entry */
1400 silc_list_start(channel->clients);
1401 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1402 if (chu->client == old) {
1408 if (!silc_idcache_list_next(list, &id_cache))
1411 channel = (SilcChannelEntry)id_cache->context;
1414 silc_idcache_list_free(list);
1417 /* Parses mode mask and returns the mode as string. */
1419 char *silc_client_chmode(uint32 mode, SilcChannelEntry channel)
1426 memset(string, 0, sizeof(string));
1428 if (mode & SILC_CHANNEL_MODE_PRIVATE)
1429 strncat(string, "p", 1);
1431 if (mode & SILC_CHANNEL_MODE_SECRET)
1432 strncat(string, "s", 1);
1434 if (mode & SILC_CHANNEL_MODE_PRIVKEY)
1435 strncat(string, "k", 1);
1437 if (mode & SILC_CHANNEL_MODE_INVITE)
1438 strncat(string, "i", 1);
1440 if (mode & SILC_CHANNEL_MODE_TOPIC)
1441 strncat(string, "t", 1);
1443 if (mode & SILC_CHANNEL_MODE_ULIMIT)
1444 strncat(string, "l", 1);
1446 if (mode & SILC_CHANNEL_MODE_PASSPHRASE)
1447 strncat(string, "a", 1);
1449 if (mode & SILC_CHANNEL_MODE_FOUNDER_AUTH)
1450 strncat(string, "f", 1);
1452 if (mode & SILC_CHANNEL_MODE_CIPHER) {
1454 memset(cipher, 0, sizeof(cipher));
1455 snprintf(cipher, sizeof(cipher), " c (%s)",
1456 channel->channel_key->cipher->name);
1457 strncat(string, cipher, strlen(cipher));
1460 if (mode & SILC_CHANNEL_MODE_HMAC) {
1462 memset(hmac, 0, sizeof(hmac));
1463 snprintf(hmac, sizeof(hmac), " h (%s)",
1464 channel->hmac->hmac->name);
1465 strncat(string, hmac, strlen(hmac));
1468 /* Rest of mode is ignored */
1470 return strdup(string);
1473 /* Parses channel user mode mask and returns te mode as string */
1475 char *silc_client_chumode(uint32 mode)
1482 memset(string, 0, sizeof(string));
1484 if (mode & SILC_CHANNEL_UMODE_CHANFO)
1485 strncat(string, "f", 1);
1487 if (mode & SILC_CHANNEL_UMODE_CHANOP)
1488 strncat(string, "o", 1);
1490 return strdup(string);
1493 /* Parses channel user mode and returns it as special mode character. */
1495 char *silc_client_chumode_char(uint32 mode)
1502 memset(string, 0, sizeof(string));
1504 if (mode & SILC_CHANNEL_UMODE_CHANFO)
1505 strncat(string, "*", 1);
1507 if (mode & SILC_CHANNEL_UMODE_CHANOP)
1508 strncat(string, "@", 1);
1510 return strdup(string);
1513 /* Failure timeout callback. If this is called then we will immediately
1514 process the received failure. We always process the failure with timeout
1515 since we do not want to blindly trust to received failure packets.
1516 This won't be called (the timeout is cancelled) if the failure was
1517 bogus (it is bogus if remote does not close the connection after sending
1520 SILC_TASK_CALLBACK_GLOBAL(silc_client_failure_callback)
1522 SilcClientFailureContext *f = (SilcClientFailureContext *)context;
1524 if (f->sock->protocol) {
1525 f->sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
1526 f->sock->protocol->execute(f->client->timeout_queue, 0,
1527 f->sock->protocol, f->sock->sock, 0, 0);
1529 /* Notify application */
1530 f->client->ops->failure(f->client, f->sock->user_data, f->sock->protocol,
1531 (void *)f->failure);
1537 /* Registers failure timeout to process the received failure packet
1540 void silc_client_process_failure(SilcClient client,
1541 SilcSocketConnection sock,
1542 SilcPacketContext *packet)
1544 SilcClientFailureContext *f;
1547 if (sock->protocol) {
1548 if (packet->buffer->len >= 4)
1549 SILC_GET32_MSB(failure, packet->buffer->data);
1551 f = silc_calloc(1, sizeof(*f));
1554 f->failure = failure;
1556 /* We will wait 5 seconds to process this failure packet */
1557 silc_task_register(client->timeout_queue, sock->sock,
1558 silc_client_failure_callback, (void *)f, 5, 0,
1559 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1563 /* A timeout callback for the re-key. We will be the initiator of the
1566 SILC_TASK_CALLBACK(silc_client_rekey_callback)
1568 SilcSocketConnection sock = (SilcSocketConnection)context;
1569 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1570 SilcClient client = (SilcClient)conn->rekey->context;
1571 SilcProtocol protocol;
1572 SilcClientRekeyInternalContext *proto_ctx;
1574 SILC_LOG_DEBUG(("Start"));
1576 /* Allocate internal protocol context. This is sent as context
1578 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
1579 proto_ctx->client = (void *)client;
1580 proto_ctx->sock = sock;
1581 proto_ctx->responder = FALSE;
1582 proto_ctx->pfs = conn->rekey->pfs;
1584 /* Perform rekey protocol. Will call the final callback after the
1585 protocol is over. */
1586 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_REKEY,
1587 &protocol, proto_ctx, silc_client_rekey_final);
1588 sock->protocol = protocol;
1590 /* Run the protocol */
1591 protocol->execute(client->timeout_queue, 0, protocol,
1594 /* Re-register re-key timeout */
1595 silc_task_register(client->timeout_queue, sock->sock,
1596 silc_client_rekey_callback,
1597 context, conn->rekey->timeout, 0,
1598 SILC_TASK_TIMEOUT, SILC_TASK_PRI_NORMAL);
1601 /* The final callback for the REKEY protocol. This will actually take the
1602 new key material into use. */
1604 SILC_TASK_CALLBACK(silc_client_rekey_final)
1606 SilcProtocol protocol = (SilcProtocol)context;
1607 SilcClientRekeyInternalContext *ctx =
1608 (SilcClientRekeyInternalContext *)protocol->context;
1609 SilcClient client = (SilcClient)ctx->client;
1610 SilcSocketConnection sock = ctx->sock;
1612 SILC_LOG_DEBUG(("Start"));
1614 if (protocol->state == SILC_PROTOCOL_STATE_ERROR ||
1615 protocol->state == SILC_PROTOCOL_STATE_FAILURE) {
1616 /* Error occured during protocol */
1617 silc_protocol_cancel(client->timeout_queue, protocol);
1618 silc_protocol_free(protocol);
1619 sock->protocol = NULL;
1621 silc_packet_context_free(ctx->packet);
1623 silc_ske_free(ctx->ske);
1628 /* Take the keys into use */
1629 if (ctx->pfs == TRUE)
1630 silc_client_protocol_rekey_generate_pfs(client, ctx);
1632 silc_client_protocol_rekey_generate(client, ctx);
1635 silc_protocol_free(protocol);
1636 sock->protocol = NULL;
1638 silc_packet_context_free(ctx->packet);
1640 silc_ske_free(ctx->ske);