5 Author: Pekka Riikonen <priikone@poseidon.pspt.fi>
7 Copyright (C) 1997 - 2000 Pekka Riikonen
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
22 #include "clientlibincludes.h"
24 /* Static task callback prototypes */
25 SILC_TASK_CALLBACK(silc_client_connect_to_server_start);
26 SILC_TASK_CALLBACK(silc_client_connect_to_server_second);
27 SILC_TASK_CALLBACK(silc_client_connect_to_server_final);
28 SILC_TASK_CALLBACK(silc_client_packet_process);
29 SILC_TASK_CALLBACK(silc_client_packet_parse_real);
31 static void silc_client_packet_parse(SilcPacketParserContext *parser_context);
32 static void silc_client_packet_parse_type(SilcClient client,
33 SilcSocketConnection sock,
34 SilcPacketContext *packet);
36 /* Allocates new client object. This has to be done before client may
37 work. After calling this one must call silc_client_init to initialize
38 the client. The `application' is application specific user data pointer
39 and caller must free it. */
41 SilcClient silc_client_alloc(SilcClientOperations *ops, void *application)
43 SilcClient new_client;
45 new_client = silc_calloc(1, sizeof(*new_client));
46 new_client->application = application;
47 new_client->ops = ops;
52 /* Free's client object */
54 void silc_client_free(SilcClient client)
61 /* Initializes the client. This makes all the necessary steps to make
62 the client ready to be run. One must call silc_client_run to run the
65 int silc_client_init(SilcClient client)
67 SILC_LOG_DEBUG(("Initializing client"));
69 /* Initialize hash functions for client to use */
70 silc_hash_alloc("md5", &client->md5hash);
71 silc_hash_alloc("sha1", &client->sha1hash);
73 /* Initialize none cipher */
74 silc_cipher_alloc("none", &client->none_cipher);
76 /* Initialize random number generator */
77 client->rng = silc_rng_alloc();
78 silc_rng_init(client->rng);
79 silc_math_primegen_init(); /* XXX */
81 /* Register protocols */
82 silc_client_protocols_register();
84 /* Initialize the scheduler */
85 silc_schedule_init(&client->io_queue, &client->timeout_queue,
86 &client->generic_queue, 5000);
91 /* Stops the client. This is called to stop the client and thus to stop
94 void silc_client_stop(SilcClient client)
96 SILC_LOG_DEBUG(("Stopping client"));
98 /* Stop the scheduler, although it might be already stopped. This
99 doesn't hurt anyone. This removes all the tasks and task queues,
101 silc_schedule_stop();
102 silc_schedule_uninit();
104 silc_client_protocols_unregister();
106 SILC_LOG_DEBUG(("Client stopped"));
109 /* Runs the client. */
111 void silc_client_run(SilcClient client)
113 SILC_LOG_DEBUG(("Running client"));
115 /* Start the scheduler, the heart of the SILC client. When this returns
116 the program will be terminated. */
120 /* Allocates and adds new connection to the client. This adds the allocated
121 connection to the connection table and returns a pointer to it. A client
122 can have multiple connections to multiple servers. Every connection must
123 be added to the client using this function. User data `context' may
124 be sent as argument. */
126 SilcClientConnection silc_client_add_connection(SilcClient client,
131 SilcClientConnection conn;
134 conn = silc_calloc(1, sizeof(*conn));
136 /* Initialize ID caches */
137 conn->client_cache = silc_idcache_alloc(0);
138 conn->channel_cache = silc_idcache_alloc(0);
139 conn->server_cache = silc_idcache_alloc(0);
140 conn->client = client;
141 conn->remote_host = strdup(hostname);
142 conn->remote_port = port;
143 conn->context = context;
145 /* Add the connection to connections table */
146 for (i = 0; i < client->conns_count; i++)
147 if (client->conns && !client->conns[i]) {
148 client->conns[i] = conn;
152 client->conns = silc_realloc(client->conns, sizeof(*client->conns)
153 * (client->conns_count + 1));
154 client->conns[client->conns_count] = conn;
155 client->conns_count++;
160 /* Removes connection from client. */
162 void silc_client_del_connection(SilcClient client, SilcClientConnection conn)
166 for (i = 0; i < client->conns_count; i++)
167 if (client->conns[i] == conn) {
169 client->conns[i] = NULL;
173 /* Internal context for connection process. This is needed as we
174 doing asynchronous connecting. */
177 SilcClientConnection conn;
183 } SilcClientInternalConnectContext;
186 silc_client_connect_to_server_internal(SilcClientInternalConnectContext *ctx)
190 /* XXX In the future we should give up this non-blocking connect all
191 together and use threads instead. */
192 /* Create connection to server asynchronously */
193 sock = silc_net_create_connection_async(ctx->port, ctx->host);
197 /* Register task that will receive the async connect and will
199 ctx->task = silc_task_register(ctx->client->io_queue, sock,
200 silc_client_connect_to_server_start,
203 SILC_TASK_PRI_NORMAL);
204 silc_task_reset_iotype(ctx->task, SILC_TASK_WRITE);
205 silc_schedule_set_listen_fd(sock, ctx->task->iomask);
212 /* Connects to remote server. This is the main routine used to connect
213 to SILC server. Returns -1 on error and the created socket otherwise.
214 The `context' is user context that is saved into the SilcClientConnection
215 that is created after the connection is created. */
217 int silc_client_connect_to_server(SilcClient client, int port,
218 char *host, void *context)
220 SilcClientInternalConnectContext *ctx;
221 SilcClientConnection conn;
224 SILC_LOG_DEBUG(("Connecting to port %d of server %s",
227 conn = silc_client_add_connection(client, host, port, context);
229 client->ops->say(client, conn,
230 "Connecting to port %d of server %s", port, host);
232 /* Allocate internal context for connection process. This is
233 needed as we are doing async connecting. */
234 ctx = silc_calloc(1, sizeof(*ctx));
235 ctx->client = client;
237 ctx->host = strdup(host);
241 /* Do the actual connecting process */
242 sock = silc_client_connect_to_server_internal(ctx);
244 silc_client_del_connection(client, conn);
248 /* Start SILC Key Exchange (SKE) protocol to negotiate shared secret
249 key material between client and server. This function can be called
250 directly if application is performing its own connecting and does not
251 use the connecting provided by this library. */
253 int silc_client_start_key_exchange(SilcClient client,
254 SilcClientConnection conn,
257 SilcProtocol protocol;
258 SilcClientKEInternalContext *proto_ctx;
261 /* Allocate new socket connection object */
262 silc_socket_alloc(fd, SILC_SOCKET_TYPE_SERVER, (void *)conn, &conn->sock);
263 if (conn->sock == NULL) {
264 client->ops->say(client, conn,
265 "Error: Could not allocate connection socket");
269 conn->nickname = strdup(client->username);
270 conn->sock->hostname = conn->remote_host;
271 conn->sock->port = conn->remote_port;
273 /* Allocate internal Key Exchange context. This is sent to the
274 protocol as context. */
275 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
276 proto_ctx->client = (void *)client;
277 proto_ctx->sock = conn->sock;
278 proto_ctx->rng = client->rng;
279 proto_ctx->responder = FALSE;
281 /* Perform key exchange protocol. silc_client_connect_to_server_final
282 will be called after the protocol is finished. */
283 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_KEY_EXCHANGE,
284 &protocol, (void *)proto_ctx,
285 silc_client_connect_to_server_second);
287 client->ops->say(client, conn,
288 "Error: Could not start authentication protocol");
291 conn->sock->protocol = protocol;
293 /* Register the connection for network input and output. This sets
294 that scheduler will listen for incoming packets for this connection
295 and sets that outgoing packets may be sent to this connection as well.
296 However, this doesn't set the scheduler for outgoing traffic, it will
297 be set separately by calling SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT,
298 later when outgoing data is available. */
299 context = (void *)client;
300 SILC_CLIENT_REGISTER_CONNECTION_FOR_IO(fd);
302 /* Execute the protocol */
303 protocol->execute(client->timeout_queue, 0, protocol, fd, 0, 0);
307 /* Start of the connection to the remote server. This is called after
308 succesful TCP/IP connection has been established to the remote host. */
310 SILC_TASK_CALLBACK(silc_client_connect_to_server_start)
312 SilcClientInternalConnectContext *ctx =
313 (SilcClientInternalConnectContext *)context;
314 SilcClient client = ctx->client;
315 SilcClientConnection conn = ctx->conn;
316 int opt, opt_len = sizeof(opt);
318 SILC_LOG_DEBUG(("Start"));
320 /* Check the socket status as it might be in error */
321 getsockopt(fd, SOL_SOCKET, SO_ERROR, &opt, &opt_len);
323 if (ctx->tries < 2) {
324 /* Connection failed but lets try again */
325 client->ops->say(client, conn, "Could not connect to server %s: %s",
326 ctx->host, strerror(opt));
327 client->ops->say(client, conn,
328 "Connecting to port %d of server %s resumed",
329 ctx->port, ctx->host);
331 /* Unregister old connection try */
332 silc_schedule_unset_listen_fd(fd);
333 silc_net_close_connection(fd);
334 silc_task_unregister(client->io_queue, ctx->task);
337 silc_client_connect_to_server_internal(ctx);
340 /* Connection failed and we won't try anymore */
341 client->ops->say(client, conn, "Could not connect to server %s: %s",
342 ctx->host, strerror(opt));
343 silc_schedule_unset_listen_fd(fd);
344 silc_net_close_connection(fd);
345 silc_task_unregister(client->io_queue, ctx->task);
348 /* Notify application of failure */
349 client->ops->connect(client, conn, FALSE);
350 silc_client_del_connection(client, conn);
355 silc_schedule_unset_listen_fd(fd);
356 silc_task_unregister(client->io_queue, ctx->task);
359 if (!silc_client_start_key_exchange(client, conn, fd)) {
360 silc_net_close_connection(fd);
361 client->ops->connect(client, conn, FALSE);
365 /* Second part of the connecting to the server. This executed
366 authentication protocol. */
368 SILC_TASK_CALLBACK(silc_client_connect_to_server_second)
370 SilcProtocol protocol = (SilcProtocol)context;
371 SilcClientKEInternalContext *ctx =
372 (SilcClientKEInternalContext *)protocol->context;
373 SilcClient client = (SilcClient)ctx->client;
374 SilcSocketConnection sock = NULL;
375 SilcClientConnAuthInternalContext *proto_ctx;
377 SILC_LOG_DEBUG(("Start"));
379 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
380 /* Error occured during protocol */
381 SILC_LOG_DEBUG(("Error during KE protocol"));
382 silc_protocol_free(protocol);
384 silc_ske_free(ctx->ske);
386 silc_free(ctx->dest_id);
387 ctx->sock->protocol = NULL;
389 /* Notify application of failure */
390 client->ops->connect(client, ctx->sock->user_data, FALSE);
395 /* Allocate internal context for the authentication protocol. This
396 is sent as context for the protocol. */
397 proto_ctx = silc_calloc(1, sizeof(*proto_ctx));
398 proto_ctx->client = (void *)client;
399 proto_ctx->sock = sock = ctx->sock;
400 proto_ctx->ske = ctx->ske; /* Save SKE object from previous protocol */
401 proto_ctx->dest_id_type = ctx->dest_id_type;
402 proto_ctx->dest_id = ctx->dest_id;
404 /* Resolve the authentication method to be used in this connection */
405 if (!client->ops->get_auth_method(client, sock->user_data, sock->hostname,
406 sock->port, &proto_ctx->auth_meth,
407 &proto_ctx->auth_data,
408 &proto_ctx->auth_data_len))
410 /* XXX do AUTH_REQUEST resolcing with server */
411 proto_ctx->auth_meth = SILC_PROTOCOL_CONN_AUTH_NONE;
414 /* Free old protocol as it is finished now */
415 silc_protocol_free(protocol);
417 silc_packet_context_free(ctx->packet);
419 /* silc_free(ctx->keymat....); */
420 sock->protocol = NULL;
422 /* Allocate the authentication protocol. This is allocated here
423 but we won't start it yet. We will be receiving party of this
424 protocol thus we will wait that connecting party will make
426 silc_protocol_alloc(SILC_PROTOCOL_CLIENT_CONNECTION_AUTH,
427 &sock->protocol, (void *)proto_ctx,
428 silc_client_connect_to_server_final);
430 /* Execute the protocol */
431 sock->protocol->execute(client->timeout_queue, 0, sock->protocol, fd, 0, 0);
434 /* Finalizes the connection to the remote SILC server. This is called
435 after authentication protocol has been completed. This send our
436 user information to the server to receive our client ID from
439 SILC_TASK_CALLBACK(silc_client_connect_to_server_final)
441 SilcProtocol protocol = (SilcProtocol)context;
442 SilcClientConnAuthInternalContext *ctx =
443 (SilcClientConnAuthInternalContext *)protocol->context;
444 SilcClient client = (SilcClient)ctx->client;
445 SilcClientConnection conn = (SilcClientConnection)ctx->sock->user_data;
448 SILC_LOG_DEBUG(("Start"));
450 if (protocol->state == SILC_PROTOCOL_STATE_ERROR) {
451 /* Error occured during protocol */
452 SILC_LOG_DEBUG(("Error during authentication protocol"));
453 silc_protocol_free(protocol);
455 silc_free(ctx->auth_data);
457 silc_ske_free(ctx->ske);
459 silc_free(ctx->dest_id);
460 conn->sock->protocol = NULL;
462 /* Notify application of failure */
463 client->ops->connect(client, ctx->sock->user_data, FALSE);
468 /* Send NEW_CLIENT packet to the server. We will become registered
469 to the SILC network after sending this packet and we will receive
470 client ID from the server. */
471 packet = silc_buffer_alloc(2 + 2 + strlen(client->username) +
472 strlen(client->realname));
473 silc_buffer_pull_tail(packet, SILC_BUFFER_END(packet));
474 silc_buffer_format(packet,
475 SILC_STR_UI_SHORT(strlen(client->username)),
476 SILC_STR_UI_XNSTRING(client->username,
477 strlen(client->username)),
478 SILC_STR_UI_SHORT(strlen(client->realname)),
479 SILC_STR_UI_XNSTRING(client->realname,
480 strlen(client->realname)),
483 /* Send the packet */
484 silc_client_packet_send(client, ctx->sock, SILC_PACKET_NEW_CLIENT,
486 packet->data, packet->len, TRUE);
487 silc_buffer_free(packet);
489 /* Save remote ID. */
490 conn->remote_id = ctx->dest_id;
491 conn->remote_id_data = silc_id_id2str(ctx->dest_id, SILC_ID_SERVER);
492 conn->remote_id_data_len = SILC_ID_SERVER_LEN;
494 /* Notify application of successful connection */
495 client->ops->connect(client, conn, TRUE);
497 silc_protocol_free(protocol);
499 silc_free(ctx->auth_data);
501 silc_ske_free(ctx->ske);
503 silc_free(ctx->dest_id);
505 conn->sock->protocol = NULL;
508 /* Internal routine that sends packet or marks packet to be sent. This
509 is used directly only in special cases. Normal cases should use
510 silc_server_packet_send. Returns < 0 on error. */
512 static int silc_client_packet_send_real(SilcClient client,
513 SilcSocketConnection sock,
518 /* Send the packet */
519 ret = silc_packet_send(sock, force_send);
523 /* Mark that there is some outgoing data available for this connection.
524 This call sets the connection both for input and output (the input
525 is set always and this call keeps the input setting, actually).
526 Actual data sending is performed by silc_client_packet_process. */
527 SILC_CLIENT_SET_CONNECTION_FOR_OUTPUT(sock->sock);
529 /* Mark to socket that data is pending in outgoing buffer. This flag
530 is needed if new data is added to the buffer before the earlier
531 put data is sent to the network. */
532 SILC_SET_OUTBUF_PENDING(sock);
537 /* Packet processing callback. This is used to send and receive packets
538 from network. This is generic task. */
540 SILC_TASK_CALLBACK(silc_client_packet_process)
542 SilcClient client = (SilcClient)context;
543 SilcSocketConnection sock = NULL;
544 SilcClientConnection conn;
547 SILC_LOG_DEBUG(("Processing packet"));
549 SILC_CLIENT_GET_SOCK(client, fd, sock);
553 conn = (SilcClientConnection)sock->user_data;
556 if (type == SILC_TASK_WRITE) {
557 SILC_LOG_DEBUG(("Writing data to connection"));
559 if (sock->outbuf->data - sock->outbuf->head)
560 silc_buffer_push(sock->outbuf,
561 sock->outbuf->data - sock->outbuf->head);
563 ret = silc_client_packet_send_real(client, sock, TRUE);
565 /* If returned -2 could not write to connection now, will do
570 /* The packet has been sent and now it is time to set the connection
571 back to only for input. When there is again some outgoing data
572 available for this connection it will be set for output as well.
573 This call clears the output setting and sets it only for input. */
574 SILC_CLIENT_SET_CONNECTION_FOR_INPUT(fd);
575 SILC_UNSET_OUTBUF_PENDING(sock);
577 silc_buffer_clear(sock->outbuf);
581 /* Packet receiving */
582 if (type == SILC_TASK_READ) {
583 SILC_LOG_DEBUG(("Reading data from connection"));
585 /* Read data from network */
586 ret = silc_packet_receive(sock);
592 SILC_LOG_DEBUG(("Read EOF"));
594 /* If connection is disconnecting already we will finally
595 close the connection */
596 if (SILC_IS_DISCONNECTING(sock)) {
597 client->ops->disconnect(client, conn);
598 silc_client_close_connection(client, sock);
602 client->ops->say(client, conn, "Connection closed: premature EOF");
603 SILC_LOG_DEBUG(("Premature EOF from connection %d", sock->sock));
604 client->ops->disconnect(client, conn);
605 silc_client_close_connection(client, sock);
609 /* Process the packet. This will call the parser that will then
610 decrypt and parse the packet. */
611 silc_packet_receive_process(sock, conn->receive_key, conn->hmac,
612 silc_client_packet_parse, client);
616 /* Parses whole packet, received earlier. */
618 SILC_TASK_CALLBACK(silc_client_packet_parse_real)
620 SilcPacketParserContext *parse_ctx = (SilcPacketParserContext *)context;
621 SilcClient client = (SilcClient)parse_ctx->context;
622 SilcPacketContext *packet = parse_ctx->packet;
623 SilcBuffer buffer = packet->buffer;
624 SilcSocketConnection sock = parse_ctx->sock;
625 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
628 SILC_LOG_DEBUG(("Start"));
630 /* Decrypt the received packet */
631 ret = silc_packet_decrypt(conn->receive_key, conn->hmac, buffer, packet);
636 /* Parse the packet. Packet type is returned. */
637 ret = silc_packet_parse(packet);
639 /* Parse the packet header in special way as this is "special"
641 ret = silc_packet_parse_special(packet);
644 if (ret == SILC_PACKET_NONE)
647 /* Parse the incoming packet type */
648 silc_client_packet_parse_type(client, sock, packet);
651 silc_buffer_clear(sock->inbuf);
652 silc_packet_context_free(packet);
653 silc_free(parse_ctx);
656 /* Parser callback called by silc_packet_receive_process. Thie merely
657 registers timeout that will handle the actual parsing when appropriate. */
659 void silc_client_packet_parse(SilcPacketParserContext *parser_context)
661 SilcClient client = (SilcClient)parser_context->context;
663 /* Parse the packet */
664 silc_task_register(client->timeout_queue, parser_context->sock->sock,
665 silc_client_packet_parse_real,
666 (void *)parser_context, 0, 1,
668 SILC_TASK_PRI_NORMAL);
671 /* Parses the packet type and calls what ever routines the packet type
672 requires. This is done for all incoming packets. */
674 void silc_client_packet_parse_type(SilcClient client,
675 SilcSocketConnection sock,
676 SilcPacketContext *packet)
678 SilcBuffer buffer = packet->buffer;
679 SilcPacketType type = packet->type;
681 SILC_LOG_DEBUG(("Parsing packet type %d", type));
683 /* Parse the packet type */
685 case SILC_PACKET_DISCONNECT:
686 silc_client_disconnected_by_server(client, sock, buffer);
688 case SILC_PACKET_SUCCESS:
690 * Success received for something. For now we can have only
691 * one protocol for connection executing at once hence this
692 * success message is for whatever protocol is executing currently.
694 if (sock->protocol) {
695 sock->protocol->execute(client->timeout_queue, 0,
696 sock->protocol, sock->sock, 0, 0);
699 case SILC_PACKET_FAILURE:
701 * Failure received for some protocol. Set the protocol state to
702 * error and call the protocol callback. This fill cause error on
703 * protocol and it will call the final callback.
705 if (sock->protocol) {
706 sock->protocol->state = SILC_PROTOCOL_STATE_FAILURE;
707 sock->protocol->execute(client->timeout_queue, 0,
708 sock->protocol, sock->sock, 0, 0);
710 /* XXX We have only two protocols currently thus we know what this
711 failure indication is. */
712 if (buffer->len >= 4) {
713 unsigned int failure;
715 SILC_GET32_MSB(failure, buffer->data);
717 /* Notify application */
718 client->ops->failure(client, sock->user_data, sock->protocol,
723 case SILC_PACKET_REJECT:
726 case SILC_PACKET_NOTIFY:
728 * Received notify message
730 silc_client_notify_by_server(client, sock, packet);
733 case SILC_PACKET_ERROR:
735 * Received error message
737 silc_client_error_by_server(client, sock, buffer);
740 case SILC_PACKET_CHANNEL_MESSAGE:
742 * Received message to (from, actually) a channel
744 silc_client_channel_message(client, sock, packet);
746 case SILC_PACKET_CHANNEL_KEY:
748 * Received key for a channel. By receiving this key the client will be
749 * able to talk to the channel it has just joined. This can also be
750 * a new key for existing channel as keys expire peridiocally.
752 silc_client_receive_channel_key(client, sock, buffer);
755 case SILC_PACKET_PRIVATE_MESSAGE:
757 * Received private message
759 silc_client_private_message(client, sock, packet);
761 case SILC_PACKET_PRIVATE_MESSAGE_KEY:
763 * Received private message key
767 case SILC_PACKET_COMMAND_REPLY:
769 * Recived reply for a command
771 silc_client_command_reply_process(client, sock, packet);
774 case SILC_PACKET_KEY_EXCHANGE:
775 if (sock->protocol) {
776 SilcClientKEInternalContext *proto_ctx =
777 (SilcClientKEInternalContext *)sock->protocol->context;
779 proto_ctx->packet = silc_packet_context_dup(packet);
780 proto_ctx->dest_id_type = packet->src_id_type;
781 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_type);
783 /* Let the protocol handle the packet */
784 sock->protocol->execute(client->timeout_queue, 0,
785 sock->protocol, sock->sock, 0, 0);
787 SILC_LOG_ERROR(("Received Key Exchange packet but no key exchange "
788 "protocol active, packet dropped."));
790 /* XXX Trigger KE protocol?? Rekey actually! */
794 case SILC_PACKET_KEY_EXCHANGE_1:
795 if (sock->protocol) {
798 SILC_LOG_ERROR(("Received Key Exchange 1 packet but no key exchange "
799 "protocol active, packet dropped."));
802 case SILC_PACKET_KEY_EXCHANGE_2:
803 if (sock->protocol) {
804 SilcClientKEInternalContext *proto_ctx =
805 (SilcClientKEInternalContext *)sock->protocol->context;
807 if (proto_ctx->packet)
808 silc_packet_context_free(proto_ctx->packet);
810 proto_ctx->packet = silc_packet_context_dup(packet);
811 proto_ctx->dest_id_type = packet->src_id_type;
812 proto_ctx->dest_id = silc_id_str2id(packet->src_id, packet->src_id_type);
814 /* Let the protocol handle the packet */
815 sock->protocol->execute(client->timeout_queue, 0,
816 sock->protocol, sock->sock, 0, 0);
818 SILC_LOG_ERROR(("Received Key Exchange 2 packet but no key exchange "
819 "protocol active, packet dropped."));
823 case SILC_PACKET_NEW_ID:
826 * Received new ID from server. This packet is received at
827 * the connection to the server. New ID is also received when
828 * user changes nickname but in that case the new ID is received
829 * as command reply and not as this packet type.
833 idp = silc_id_payload_parse(buffer);
834 if (silc_id_payload_get_type(idp) != SILC_ID_CLIENT)
837 silc_client_receive_new_id(client, sock, idp);
838 silc_id_payload_free(idp);
843 SILC_LOG_DEBUG(("Incorrect packet type %d, packet dropped", type));
848 /* Sends packet. This doesn't actually send the packet instead it assembles
849 it and marks it to be sent. However, if force_send is TRUE the packet
850 is sent immediately. if dst_id, cipher and hmac are NULL those parameters
851 will be derived from sock argument. Otherwise the valid arguments sent
854 void silc_client_packet_send(SilcClient client,
855 SilcSocketConnection sock,
858 SilcIdType dst_id_type,
862 unsigned int data_len,
865 SilcPacketContext packetdata;
867 SILC_LOG_DEBUG(("Sending packet, type %d", type));
869 /* Get data used in the packet sending, keys and stuff */
870 if ((!cipher || !hmac || !dst_id) && sock->user_data) {
871 if (!cipher && ((SilcClientConnection)sock->user_data)->send_key)
872 cipher = ((SilcClientConnection)sock->user_data)->send_key;
874 if (!hmac && ((SilcClientConnection)sock->user_data)->hmac)
875 hmac = ((SilcClientConnection)sock->user_data)->hmac;
877 if (!dst_id && ((SilcClientConnection)sock->user_data)->remote_id) {
878 dst_id = ((SilcClientConnection)sock->user_data)->remote_id;
879 dst_id_type = SILC_ID_SERVER;
883 /* Set the packet context pointers */
884 packetdata.flags = 0;
885 packetdata.type = type;
886 if (((SilcClientConnection)sock->user_data)->local_id_data)
887 packetdata.src_id = ((SilcClientConnection)sock->user_data)->local_id_data;
889 packetdata.src_id = silc_calloc(SILC_ID_CLIENT_LEN, sizeof(unsigned char));
890 packetdata.src_id_len = SILC_ID_CLIENT_LEN;
891 packetdata.src_id_type = SILC_ID_CLIENT;
893 packetdata.dst_id = silc_id_id2str(dst_id, dst_id_type);
894 packetdata.dst_id_len = silc_id_get_len(dst_id_type);
895 packetdata.dst_id_type = dst_id_type;
897 packetdata.dst_id = NULL;
898 packetdata.dst_id_len = 0;
899 packetdata.dst_id_type = SILC_ID_NONE;
901 packetdata.rng = client->rng;
902 packetdata.truelen = data_len + SILC_PACKET_HEADER_LEN +
903 packetdata.src_id_len + packetdata.dst_id_len;
904 packetdata.padlen = SILC_PACKET_PADLEN(packetdata.truelen);
906 /* Prepare outgoing data buffer for packet sending */
907 silc_packet_send_prepare(sock,
908 SILC_PACKET_HEADER_LEN +
909 packetdata.src_id_len +
910 packetdata.dst_id_len,
914 SILC_LOG_DEBUG(("Putting data to outgoing buffer, len %d", data_len));
916 packetdata.buffer = sock->outbuf;
918 /* Put the data to the buffer */
919 if (data && data_len)
920 silc_buffer_put(sock->outbuf, data, data_len);
922 /* Create the outgoing packet */
923 silc_packet_assemble(&packetdata);
925 /* Encrypt the packet */
927 silc_packet_encrypt(cipher, hmac, sock->outbuf, sock->outbuf->len);
929 SILC_LOG_HEXDUMP(("Packet, len %d", sock->outbuf->len),
930 sock->outbuf->data, sock->outbuf->len);
932 /* Now actually send the packet */
933 silc_client_packet_send_real(client, sock, force_send);
936 /* Sends packet to a channel. Packet to channel is always encrypted
937 differently from "normal" packets. SILC header of the packet is
938 encrypted with the next receiver's key and the rest of the packet is
939 encrypted with the channel specific key. Padding and HMAC is computed
940 with the next receiver's key. */
942 void silc_client_packet_send_to_channel(SilcClient client,
943 SilcSocketConnection sock,
944 SilcChannelEntry channel,
946 unsigned int data_len,
950 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
952 SilcPacketContext packetdata;
955 unsigned char *id_string;
957 SILC_LOG_DEBUG(("Sending packet to channel"));
959 if (!channel || !channel->key) {
960 client->ops->say(client, conn,
961 "Cannot talk to channel: key does not exist");
967 for (i = 0; i < 16; i++) channel->iv[i] = silc_rng_get_byte(client->rng);
969 silc_hash_make(client->md5hash, channel->iv, 16, channel->iv);
971 /* Encode the channel payload */
972 payload = silc_channel_payload_encode(data_len, data, 16, channel->iv,
975 client->ops->say(client, conn,
976 "Error: Could not create packet to be sent to channel");
980 /* Get data used in packet header encryption, keys and stuff. Rest
981 of the packet (the payload) is, however, encrypted with the
982 specified channel key. */
983 cipher = conn->send_key;
985 id_string = silc_id_id2str(channel->id, SILC_ID_CHANNEL);
987 /* Set the packet context pointers. The destination ID is always
988 the Channel ID of the channel. Server and router will handle the
989 distribution of the packet. */
990 packetdata.flags = 0;
991 packetdata.type = SILC_PACKET_CHANNEL_MESSAGE;
992 packetdata.src_id = conn->local_id_data;
993 packetdata.src_id_len = SILC_ID_CLIENT_LEN;
994 packetdata.src_id_type = SILC_ID_CLIENT;
995 packetdata.dst_id = id_string;
996 packetdata.dst_id_len = SILC_ID_CHANNEL_LEN;
997 packetdata.dst_id_type = SILC_ID_CHANNEL;
998 packetdata.rng = client->rng;
999 packetdata.truelen = payload->len + SILC_PACKET_HEADER_LEN +
1000 packetdata.src_id_len + packetdata.dst_id_len;
1001 packetdata.padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
1002 packetdata.src_id_len +
1003 packetdata.dst_id_len));
1005 /* Prepare outgoing data buffer for packet sending */
1006 silc_packet_send_prepare(sock,
1007 SILC_PACKET_HEADER_LEN +
1008 packetdata.src_id_len +
1009 packetdata.dst_id_len,
1013 packetdata.buffer = sock->outbuf;
1015 /* Encrypt payload of the packet. This is encrypted with the channel key. */
1016 channel->channel_key->cipher->encrypt(channel->channel_key->context,
1017 payload->data, payload->data,
1018 payload->len - 16, /* -IV_LEN */
1021 /* Put the actual encrypted payload data into the buffer. */
1022 silc_buffer_put(sock->outbuf, payload->data, payload->len);
1024 /* Create the outgoing packet */
1025 silc_packet_assemble(&packetdata);
1027 /* Encrypt the header and padding of the packet. This is encrypted
1028 with normal session key shared with our server. */
1029 silc_packet_encrypt(cipher, hmac, sock->outbuf, SILC_PACKET_HEADER_LEN +
1030 packetdata.src_id_len + packetdata.dst_id_len +
1033 SILC_LOG_HEXDUMP(("Packet to channel, len %d", sock->outbuf->len),
1034 sock->outbuf->data, sock->outbuf->len);
1036 /* Now actually send the packet */
1037 silc_client_packet_send_real(client, sock, force_send);
1038 silc_buffer_free(payload);
1039 silc_free(id_string);
1042 /* Sends private message to remote client. If private message key has
1043 not been set with this client then the message will be encrypted using
1044 normal session keys. Private messages are special packets in SILC
1045 network hence we need this own function for them. This is similiar
1046 to silc_client_packet_send_to_channel except that we send private
1049 void silc_client_packet_send_private_message(SilcClient client,
1050 SilcSocketConnection sock,
1051 SilcClientEntry client_entry,
1052 unsigned char *data,
1053 unsigned int data_len,
1056 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1058 SilcPacketContext packetdata;
1059 unsigned int nick_len;
1063 SILC_LOG_DEBUG(("Sending private message"));
1065 /* Create private message payload */
1066 nick_len = strlen(conn->nickname);
1067 buffer = silc_buffer_alloc(2 + nick_len + data_len);
1068 silc_buffer_pull_tail(buffer, SILC_BUFFER_END(buffer));
1069 silc_buffer_format(buffer,
1070 SILC_STR_UI_SHORT(nick_len),
1071 SILC_STR_UI_XNSTRING(conn->nickname,
1073 SILC_STR_UI_XNSTRING(data, data_len),
1076 /* If we don't have private message specific key then private messages
1077 are just as any normal packet thus call normal packet sending. If
1078 the key exist then the encryption process is a bit different and
1079 will be done in the rest of this function. */
1080 if (!client_entry->send_key) {
1081 silc_client_packet_send(client, sock, SILC_PACKET_PRIVATE_MESSAGE,
1082 client_entry->id, SILC_ID_CLIENT, NULL, NULL,
1083 buffer->data, buffer->len, force_send);
1087 /* We have private message specific key */
1089 /* Get data used in the encryption */
1090 cipher = client_entry->send_key;
1093 /* Set the packet context pointers. */
1094 packetdata.flags = 0;
1095 packetdata.type = SILC_PACKET_PRIVATE_MESSAGE;
1096 packetdata.src_id = conn->local_id_data;
1097 packetdata.src_id_len = SILC_ID_CLIENT_LEN;
1098 packetdata.src_id_type = SILC_ID_CLIENT;
1100 packetdata.dst_id = silc_id_id2str(client_entry->id, SILC_ID_CLIENT);
1102 packetdata.dst_id = conn->local_id_data;
1103 packetdata.dst_id_len = SILC_ID_CLIENT_LEN;
1104 packetdata.dst_id_type = SILC_ID_CLIENT;
1105 packetdata.rng = client->rng;
1106 packetdata.truelen = buffer->len + SILC_PACKET_HEADER_LEN +
1107 packetdata.src_id_len + packetdata.dst_id_len;
1108 packetdata.padlen = SILC_PACKET_PADLEN((SILC_PACKET_HEADER_LEN +
1109 packetdata.src_id_len +
1110 packetdata.dst_id_len));
1112 /* Prepare outgoing data buffer for packet sending */
1113 silc_packet_send_prepare(sock,
1114 SILC_PACKET_HEADER_LEN +
1115 packetdata.src_id_len +
1116 packetdata.dst_id_len,
1120 packetdata.buffer = sock->outbuf;
1122 /* Encrypt payload of the packet. Encrypt with private message specific
1123 key if it exist, otherwise with session key. */
1124 cipher->cipher->encrypt(cipher->context, buffer->data, buffer->data,
1125 buffer->len, cipher->iv);
1127 /* Put the actual encrypted payload data into the buffer. */
1128 silc_buffer_put(sock->outbuf, buffer->data, buffer->len);
1130 /* Create the outgoing packet */
1131 silc_packet_assemble(&packetdata);
1133 /* Encrypt the header and padding of the packet. */
1134 silc_packet_encrypt(cipher, hmac, sock->outbuf, SILC_PACKET_HEADER_LEN +
1135 packetdata.src_id_len + packetdata.dst_id_len +
1138 SILC_LOG_HEXDUMP(("Private message packet, len %d", sock->outbuf->len),
1139 sock->outbuf->data, sock->outbuf->len);
1141 /* Now actually send the packet */
1142 silc_client_packet_send_real(client, sock, force_send);
1143 silc_free(packetdata.dst_id);
1149 /* Closes connection to remote end. Free's all allocated data except
1150 for some information such as nickname etc. that are valid at all time. */
1152 void silc_client_close_connection(SilcClient client,
1153 SilcSocketConnection sock)
1155 SilcClientConnection conn;
1157 /* We won't listen for this connection anymore */
1158 silc_schedule_unset_listen_fd(sock->sock);
1160 /* Unregister all tasks */
1161 silc_task_unregister_by_fd(client->io_queue, sock->sock);
1162 silc_task_unregister_by_fd(client->timeout_queue, sock->sock);
1164 /* Close the actual connection */
1165 silc_net_close_connection(sock->sock);
1167 client->ops->say(client, sock->user_data,
1168 "Closed connection to host %s", sock->hostname ?
1169 sock->hostname : sock->ip);
1171 /* Free everything */
1172 if (sock->user_data) {
1173 conn = (SilcClientConnection)sock->user_data;
1175 /* XXX Free all client entries and channel entries. */
1177 /* Clear ID caches */
1178 silc_idcache_del_all(conn->client_cache);
1179 silc_idcache_del_all(conn->channel_cache);
1182 if (conn->remote_host)
1183 silc_free(conn->remote_host);
1185 silc_free(conn->local_id);
1186 if (conn->local_id_data)
1187 silc_free(conn->local_id_data);
1189 silc_cipher_free(conn->send_key);
1190 if (conn->receive_key)
1191 silc_cipher_free(conn->receive_key);
1193 silc_hmac_free(conn->hmac);
1194 if (conn->hmac_key) {
1195 memset(conn->hmac_key, 0, conn->hmac_key_len);
1196 silc_free(conn->hmac_key);
1200 conn->remote_port = 0;
1201 conn->remote_type = 0;
1202 conn->send_key = NULL;
1203 conn->receive_key = NULL;
1205 conn->hmac_key = NULL;
1206 conn->hmac_key_len = 0;
1207 conn->local_id = NULL;
1208 conn->local_id_data = NULL;
1209 conn->remote_host = NULL;
1210 conn->current_channel = NULL;
1212 silc_client_del_connection(client, conn);
1215 if (sock->protocol) {
1216 silc_protocol_free(sock->protocol);
1217 sock->protocol = NULL;
1219 silc_socket_free(sock);
1222 /* Called when we receive disconnection packet from server. This
1223 closes our end properly and displays the reason of the disconnection
1226 void silc_client_disconnected_by_server(SilcClient client,
1227 SilcSocketConnection sock,
1232 SILC_LOG_DEBUG(("Server disconnected us, sock %d", sock->sock));
1234 msg = silc_calloc(message->len + 1, sizeof(char));
1235 memcpy(msg, message->data, message->len);
1236 client->ops->say(client, sock->user_data, msg);
1239 SILC_SET_DISCONNECTED(sock);
1240 silc_client_close_connection(client, sock);
1243 /* Received error message from server. Display it on the screen.
1244 We don't take any action what so ever of the error message. */
1246 void silc_client_error_by_server(SilcClient client,
1247 SilcSocketConnection sock,
1252 msg = silc_calloc(message->len + 1, sizeof(char));
1253 memcpy(msg, message->data, message->len);
1254 client->ops->say(client, sock->user_data, msg);
1258 /* Called when notify is received and some async operation (such as command)
1259 is required before processing the notify message. This calls again the
1260 silc_client_notify_by_server and reprocesses the original notify packet. */
1262 static void silc_client_notify_by_server_pending(void *context)
1264 SilcPacketContext *p = (SilcPacketContext *)context;
1265 silc_client_notify_by_server(p->context, p->sock, p);
1266 silc_packet_context_free(p);
1269 /* Received notify message from server */
1271 void silc_client_notify_by_server(SilcClient client,
1272 SilcSocketConnection sock,
1273 SilcPacketContext *packet)
1275 SilcBuffer buffer = packet->buffer;
1276 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1277 SilcNotifyPayload payload;
1278 SilcNotifyType type;
1279 SilcArgumentPayload args;
1282 SilcClientID *client_id = NULL;
1283 SilcChannelID *channel_id = NULL;
1284 SilcClientEntry client_entry;
1285 SilcClientEntry client_entry2;
1286 SilcChannelEntry channel;
1287 SilcChannelUser chu;
1288 SilcIDCacheEntry id_cache = NULL;
1290 unsigned int tmp_len, mode;
1292 payload = silc_notify_payload_parse(buffer);
1293 type = silc_notify_get_type(payload);
1294 args = silc_notify_get_args(payload);
1299 case SILC_NOTIFY_TYPE_NONE:
1300 /* Notify application */
1301 client->ops->notify(client, conn, type,
1302 silc_argument_get_arg_type(args, 1, NULL));
1305 case SILC_NOTIFY_TYPE_INVITE:
1307 * Someone invited me to a channel. Find Client and Channel entries
1308 * for the application.
1312 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1316 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1318 /* Find Client entry and if not found query it */
1319 client_entry = silc_idlist_get_client_by_id(client, conn, client_id, TRUE);
1320 if (!client_entry) {
1321 SilcPacketContext *p = silc_packet_context_dup(packet);
1322 p->context = (void *)client;
1324 silc_client_command_pending(SILC_COMMAND_WHOIS,
1325 silc_client_notify_by_server_pending, p);
1329 /* Get Channel ID */
1330 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1334 channel_id = silc_id_payload_parse_id(tmp, tmp_len);
1336 /* XXX Will ALWAYS fail because currently we don't have way to resolve
1337 channel information for channel that we're not joined to. */
1338 /* XXX ways to fix: use (extended) LIST command, or define the channel
1339 name to the notfy type when name resolving is not mandatory. */
1340 /* Find channel entry */
1341 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
1342 SILC_ID_CHANNEL, &id_cache))
1345 channel = (SilcChannelEntry)id_cache->context;
1347 /* Notify application */
1348 client->ops->notify(client, conn, type, client_entry, channel);
1351 case SILC_NOTIFY_TYPE_JOIN:
1353 * Someone has joined to a channel. Get their ID and nickname and
1354 * cache them for later use.
1358 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1362 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1364 /* Find Client entry and if not found query it */
1365 client_entry = silc_idlist_get_client_by_id(client, conn, client_id, TRUE);
1366 if (!client_entry) {
1367 SilcPacketContext *p = silc_packet_context_dup(packet);
1368 p->context = (void *)client;
1370 silc_client_command_pending(SILC_COMMAND_WHOIS,
1371 silc_client_notify_by_server_pending, p);
1375 /* Get channel entry */
1376 channel_id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
1377 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
1378 SILC_ID_CHANNEL, &id_cache))
1381 channel = (SilcChannelEntry)id_cache->context;
1383 /* Add client to channel */
1384 chu = silc_calloc(1, sizeof(*chu));
1385 chu->client = client_entry;
1386 silc_list_add(channel->clients, chu);
1388 /* XXX add support for multiple same nicks on same channel. Check
1391 /* Notify application. The channel entry is sent last as this notify
1392 is for channel but application don't know it from the arguments
1394 client->ops->notify(client, conn, type, client_entry, channel);
1397 case SILC_NOTIFY_TYPE_LEAVE:
1399 * Someone has left a channel. We will remove it from the channel but
1400 * we'll keep it in the cache in case we'll need it later.
1404 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1408 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1410 /* Find Client entry */
1412 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1416 /* Get channel entry */
1417 channel_id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
1418 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
1419 SILC_ID_CHANNEL, &id_cache))
1422 channel = (SilcChannelEntry)id_cache->context;
1424 /* Remove client from channel */
1425 silc_list_start(channel->clients);
1426 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1427 if (chu->client == client_entry) {
1428 silc_list_del(channel->clients, chu);
1434 /* Notify application. The channel entry is sent last as this notify
1435 is for channel but application don't know it from the arguments
1437 client->ops->notify(client, conn, type, client_entry, channel);
1440 case SILC_NOTIFY_TYPE_SIGNOFF:
1442 * Someone left SILC. We'll remove it from all channels and from cache.
1446 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1450 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1452 /* Find Client entry */
1454 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1458 /* Remove from all channels */
1459 silc_client_remove_from_channels(client, conn, client_entry);
1461 /* Remove from cache */
1462 silc_idcache_del_by_id(conn->client_cache, SILC_ID_CLIENT,
1465 /* Notify application */
1466 client->ops->notify(client, conn, type, client_entry);
1469 if (client_entry->nickname)
1470 silc_free(client_entry->nickname);
1471 if (client_entry->server)
1472 silc_free(client_entry->server);
1473 if (client_entry->id)
1474 silc_free(client_entry->id);
1475 if (client_entry->send_key)
1476 silc_cipher_free(client_entry->send_key);
1477 if (client_entry->receive_key)
1478 silc_cipher_free(client_entry->receive_key);
1481 case SILC_NOTIFY_TYPE_TOPIC_SET:
1483 * Someone set the topic on a channel.
1487 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1491 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1493 /* Find Client entry */
1495 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1500 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1504 /* Get channel entry */
1505 channel_id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
1506 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
1507 SILC_ID_CHANNEL, &id_cache))
1510 channel = (SilcChannelEntry)id_cache->context;
1512 /* Notify application. The channel entry is sent last as this notify
1513 is for channel but application don't know it from the arguments
1515 client->ops->notify(client, conn, type, client_entry, tmp, channel);
1518 case SILC_NOTIFY_TYPE_NICK_CHANGE:
1520 * Someone changed their nickname. If we don't have entry for the new
1521 * ID we will query it and return here after it's done. After we've
1522 * returned we fetch the old entry and free it and notify the
1526 /* Get new Client ID */
1527 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1531 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1534 if (!SILC_ID_CLIENT_COMPARE(client_id, conn->local_id))
1537 /* Find Client entry and if not found query it */
1539 silc_idlist_get_client_by_id(client, conn, client_id, TRUE);
1540 if (!client_entry2) {
1541 SilcPacketContext *p = silc_packet_context_dup(packet);
1542 p->context = (void *)client;
1544 silc_client_command_pending(SILC_COMMAND_WHOIS,
1545 silc_client_notify_by_server_pending, p);
1549 /* Get old Client ID */
1550 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1554 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1556 /* Find old Client entry */
1558 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1562 /* Remove the old from cache */
1563 silc_idcache_del_by_id(conn->client_cache, SILC_ID_CLIENT,
1566 /* Replace old ID entry with new one on all channels. */
1567 silc_client_replace_from_channels(client, conn, client_entry,
1570 /* Notify application */
1571 client->ops->notify(client, conn, type, client_entry, client_entry2);
1574 if (client_entry->nickname)
1575 silc_free(client_entry->nickname);
1576 if (client_entry->server)
1577 silc_free(client_entry->server);
1578 if (client_entry->id)
1579 silc_free(client_entry->id);
1580 if (client_entry->send_key)
1581 silc_cipher_free(client_entry->send_key);
1582 if (client_entry->receive_key)
1583 silc_cipher_free(client_entry->receive_key);
1586 case SILC_NOTIFY_TYPE_CMODE_CHANGE:
1588 * Someone changed a channel mode
1592 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1596 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1598 /* Find Client entry */
1600 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1605 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1609 SILC_GET32_MSB(mode, tmp);
1611 /* Get channel entry */
1612 channel_id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
1613 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
1614 SILC_ID_CHANNEL, &id_cache))
1617 channel = (SilcChannelEntry)id_cache->context;
1619 /* Save the new mode */
1620 channel->mode = mode;
1622 /* Notify application. The channel entry is sent last as this notify
1623 is for channel but application don't know it from the arguments
1625 client->ops->notify(client, conn, type, client_entry, mode, channel);
1628 case SILC_NOTIFY_TYPE_CUMODE_CHANGE:
1630 * Someone changed user's mode on a channel
1634 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1638 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1640 /* Find Client entry */
1642 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1647 tmp = silc_argument_get_arg_type(args, 2, &tmp_len);
1651 SILC_GET32_MSB(mode, tmp);
1653 /* Get target Client ID */
1654 tmp = silc_argument_get_arg_type(args, 3, &tmp_len);
1658 silc_free(client_id);
1659 client_id = silc_id_payload_parse_id(tmp, tmp_len);
1661 /* Find target Client entry */
1663 silc_idlist_get_client_by_id(client, conn, client_id, FALSE);
1667 /* Get channel entry */
1668 channel_id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
1669 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)channel_id,
1670 SILC_ID_CHANNEL, &id_cache))
1673 channel = (SilcChannelEntry)id_cache->context;
1676 silc_list_start(channel->clients);
1677 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1678 if (chu->client == client_entry) {
1684 /* Notify application. The channel entry is sent last as this notify
1685 is for channel but application don't know it from the arguments
1687 client->ops->notify(client, conn, type, client_entry, mode,
1688 client_entry2, channel);
1691 case SILC_NOTIFY_TYPE_MOTD:
1693 * Received Message of the day
1697 tmp = silc_argument_get_arg_type(args, 1, &tmp_len);
1701 /* Notify application */
1702 client->ops->notify(client, conn, type, tmp);
1710 silc_notify_payload_free(payload);
1712 silc_free(client_id);
1714 silc_free(channel_id);
1717 /* Processes the received new Client ID from server. Old Client ID is
1718 deleted from cache and new one is added. */
1720 void silc_client_receive_new_id(SilcClient client,
1721 SilcSocketConnection sock,
1724 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1726 /* Delete old ID from ID cache */
1727 silc_idcache_del_by_id(conn->client_cache, SILC_ID_CLIENT, conn->local_id);
1729 /* Save the new ID */
1731 silc_free(conn->local_id);
1732 if (conn->local_id_data)
1733 silc_free(conn->local_id_data);
1735 conn->local_id = silc_id_payload_get_id(idp);
1736 conn->local_id_data = silc_id_payload_get_data(idp);
1737 conn->local_id_data_len = silc_id_payload_get_len(idp);;
1739 if (!conn->local_entry)
1740 conn->local_entry = silc_calloc(1, sizeof(*conn->local_entry));
1742 conn->local_entry->nickname = conn->nickname;
1743 if (!conn->local_entry->username) {
1744 conn->local_entry->username =
1745 silc_calloc(strlen(client->username) + strlen(client->hostname) + 1,
1746 sizeof(conn->local_entry->username));
1747 sprintf(conn->local_entry->username, "%s@%s", client->username,
1750 conn->local_entry->server = strdup(conn->remote_host);
1751 conn->local_entry->id = conn->local_id;
1753 /* Put it to the ID cache */
1754 silc_idcache_add(conn->client_cache, conn->nickname, SILC_ID_CLIENT,
1755 conn->local_id, (void *)conn->local_entry, TRUE);
1758 /* Processed received Channel ID for a channel. This is called when client
1759 joins to channel and server replies with channel ID. The ID is cached. */
1761 void silc_client_new_channel_id(SilcClient client,
1762 SilcSocketConnection sock,
1764 unsigned int mode, SilcIDPayload idp)
1766 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1767 SilcChannelEntry channel;
1769 SILC_LOG_DEBUG(("New channel ID"));
1771 channel = silc_calloc(1, sizeof(*channel));
1772 channel->channel_name = channel_name;
1773 channel->id = silc_id_payload_get_id(idp);
1774 channel->mode = mode;
1775 silc_list_init(channel->clients, struct SilcChannelUserStruct, next);
1777 conn->current_channel = channel;
1779 /* Put it to the ID cache */
1780 silc_idcache_add(conn->channel_cache, channel_name, SILC_ID_CHANNEL,
1781 (void *)channel->id, (void *)channel, TRUE);
1784 /* Saves channel key from encoded `key_payload'. This is used when we
1785 receive Channel Key Payload and when we are processing JOIN command
1788 void silc_client_save_channel_key(SilcClientConnection conn,
1789 SilcBuffer key_payload,
1790 SilcChannelEntry channel)
1792 unsigned char *id_string, *key, *cipher;
1793 unsigned int tmp_len;
1795 SilcIDCacheEntry id_cache = NULL;
1796 SilcChannelKeyPayload payload;
1798 payload = silc_channel_key_payload_parse(key_payload);
1802 id_string = silc_channel_key_get_id(payload, &tmp_len);
1804 silc_channel_key_payload_free(payload);
1808 id = silc_id_str2id(id_string, SILC_ID_CHANNEL);
1812 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)id,
1813 SILC_ID_CHANNEL, &id_cache))
1816 /* Get channel entry */
1817 channel = (SilcChannelEntry)id_cache->context;
1821 key = silc_channel_key_get_key(payload, &tmp_len);
1822 cipher = silc_channel_key_get_cipher(payload, NULL);
1823 channel->key_len = tmp_len;
1824 channel->key = silc_calloc(tmp_len, sizeof(*channel->key));
1825 memcpy(channel->key, key, tmp_len);
1827 if (!silc_cipher_alloc(cipher, &channel->channel_key)) {
1828 conn->client->ops->say(conn->client, conn,
1829 "Cannot talk to channel: unsupported cipher %s", cipher);
1832 channel->channel_key->cipher->set_key(channel->channel_key->context,
1835 /* Client is now joined to the channel */
1836 channel->on_channel = TRUE;
1840 silc_channel_key_payload_free(payload);
1843 /* Processes received key for channel. The received key will be used
1844 to protect the traffic on the channel for now on. Client must receive
1845 the key to the channel before talking on the channel is possible.
1846 This is the key that server has generated, this is not the channel
1847 private key, it is entirely local setting. */
1849 void silc_client_receive_channel_key(SilcClient client,
1850 SilcSocketConnection sock,
1853 SILC_LOG_DEBUG(("Received key for channel"));
1856 silc_client_save_channel_key(sock->user_data, packet, NULL);
1859 /* Process received message to a channel (or from a channel, really). This
1860 decrypts the channel message with channel specific key and parses the
1861 channel payload. Finally it displays the message on the screen. */
1863 void silc_client_channel_message(SilcClient client,
1864 SilcSocketConnection sock,
1865 SilcPacketContext *packet)
1867 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1868 SilcBuffer buffer = packet->buffer;
1869 SilcChannelPayload payload = NULL;
1870 SilcChannelID *id = NULL;
1871 SilcChannelEntry channel;
1872 SilcChannelUser chu;
1873 SilcIDCacheEntry id_cache = NULL;
1874 SilcClientID *client_id = NULL;
1879 if (packet->dst_id_type != SILC_ID_CHANNEL)
1882 client_id = silc_id_str2id(packet->src_id, SILC_ID_CLIENT);
1883 id = silc_id_str2id(packet->dst_id, SILC_ID_CHANNEL);
1885 /* Find the channel entry from channels on this connection */
1886 if (!silc_idcache_find_by_id_one(conn->channel_cache, (void *)id,
1887 SILC_ID_CHANNEL, &id_cache))
1890 channel = (SilcChannelEntry)id_cache->context;
1892 /* Decrypt the channel message payload. Push the IV out of the way,
1893 since it is not encrypted (after pushing buffer->tail has the IV). */
1894 silc_buffer_push_tail(buffer, 16);
1895 channel->channel_key->cipher->decrypt(channel->channel_key->context,
1896 buffer->data, buffer->data,
1897 buffer->len, buffer->tail);
1898 silc_buffer_pull_tail(buffer, 16);
1900 /* Parse the channel message payload */
1901 payload = silc_channel_payload_parse(buffer);
1906 nickname = "[unknown]";
1907 silc_list_start(channel->clients);
1908 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
1909 if (!SILC_ID_CLIENT_COMPARE(chu->client->id, client_id)) {
1910 nickname = chu->client->nickname;
1915 /* Pass the message to application */
1916 client->ops->channel_message(client, conn, nickname,
1917 channel->channel_name,
1918 silc_channel_get_data(payload, NULL));
1924 silc_free(client_id);
1926 silc_channel_payload_free(payload);
1929 /* Private message received. This processes the private message and
1930 finally displays it on the screen. */
1932 void silc_client_private_message(SilcClient client,
1933 SilcSocketConnection sock,
1934 SilcPacketContext *packet)
1936 SilcClientConnection conn = (SilcClientConnection)sock->user_data;
1937 SilcBuffer buffer = packet->buffer;
1938 unsigned short nick_len;
1939 unsigned char *nickname, *message;
1942 silc_buffer_unformat(buffer,
1943 SILC_STR_UI16_NSTRING_ALLOC(&nickname, &nick_len),
1945 silc_buffer_pull(buffer, 2 + nick_len);
1947 message = silc_calloc(buffer->len + 1, sizeof(char));
1948 memcpy(message, buffer->data, buffer->len);
1950 /* Pass the private message to application */
1951 client->ops->private_message(client, conn, nickname, message);
1953 /* See if we are away (gone). If we are away we will reply to the
1954 sender with the set away message. */
1955 if (conn->away && conn->away->away) {
1956 SilcClientID *remote_id;
1957 SilcClientEntry remote_client;
1958 SilcIDCacheEntry id_cache;
1960 if (packet->src_id_type != SILC_ID_CLIENT)
1963 remote_id = silc_id_str2id(packet->src_id, SILC_ID_CLIENT);
1967 /* If it's me, ignore */
1968 if (!SILC_ID_CLIENT_COMPARE(remote_id, conn->local_id))
1971 /* Check whether we know this client already */
1972 if (!silc_idcache_find_by_id_one(conn->client_cache, remote_id,
1973 SILC_ID_CLIENT, &id_cache))
1975 /* Allocate client entry */
1976 remote_client = silc_calloc(1, sizeof(*remote_client));
1977 remote_client->id = remote_id;
1978 silc_parse_nickname(nickname, &remote_client->nickname,
1979 &remote_client->server, &remote_client->num);
1981 /* Save the client to cache */
1982 silc_idcache_add(conn->client_cache, remote_client->nickname,
1983 SILC_ID_CLIENT, remote_client->id, remote_client,
1986 silc_free(remote_id);
1987 remote_client = (SilcClientEntry)id_cache->context;
1990 /* Send the away message */
1991 silc_client_packet_send_private_message(client, sock, remote_client,
1993 strlen(conn->away->away), TRUE);
1997 memset(message, 0, buffer->len);
1999 silc_free(nickname);
2002 /* Removes a client entry from all channel it has joined. This really is
2003 a performance killer (client_entry should have pointers to channel
2006 void silc_client_remove_from_channels(SilcClient client,
2007 SilcClientConnection conn,
2008 SilcClientEntry client_entry)
2010 SilcIDCacheEntry id_cache;
2011 SilcIDCacheList list;
2012 SilcChannelEntry channel;
2013 SilcChannelUser chu;
2016 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
2017 SILC_ID_CHANNEL, &list))
2020 silc_idcache_list_first(list, &id_cache);
2021 channel = (SilcChannelEntry)id_cache->context;
2025 /* Remove client from channel */
2026 silc_list_start(channel->clients);
2027 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
2028 if (chu->client == client_entry) {
2029 silc_list_del(channel->clients, chu);
2035 if (!silc_idcache_list_next(list, &id_cache))
2038 channel = (SilcChannelEntry)id_cache->context;
2041 silc_idcache_list_free(list);
2044 /* Replaces `old' client entries from all channels to `new' client entry.
2045 This can be called for example when nickname changes and old ID entry
2046 is replaced from ID cache with the new one. If the old ID entry is only
2047 updated, then this fucntion needs not to be called. */
2049 void silc_client_replace_from_channels(SilcClient client,
2050 SilcClientConnection conn,
2051 SilcClientEntry old,
2052 SilcClientEntry new)
2054 SilcIDCacheEntry id_cache;
2055 SilcIDCacheList list;
2056 SilcChannelEntry channel;
2057 SilcChannelUser chu;
2060 if (!silc_idcache_find_by_id(conn->channel_cache, SILC_ID_CACHE_ANY,
2061 SILC_ID_CHANNEL, &list))
2064 silc_idcache_list_first(list, &id_cache);
2065 channel = (SilcChannelEntry)id_cache->context;
2069 /* Replace client entry */
2070 silc_list_start(channel->clients);
2071 while ((chu = silc_list_get(channel->clients)) != SILC_LIST_END) {
2072 if (chu->client == old) {
2078 if (!silc_idcache_list_next(list, &id_cache))
2081 channel = (SilcChannelEntry)id_cache->context;
2084 silc_idcache_list_free(list);
2087 /* Parses mode mask and returns the mode as string. */
2089 char *silc_client_chmode(unsigned int mode)
2096 memset(string, 0, sizeof(string));
2098 if (mode & SILC_CHANNEL_MODE_PRIVATE)
2099 strncat(string, "p", 1);
2101 if (mode & SILC_CHANNEL_MODE_SECRET)
2102 strncat(string, "s", 1);
2104 if (mode & SILC_CHANNEL_MODE_PRIVKEY)
2105 strncat(string, "k", 1);
2107 if (mode & SILC_CHANNEL_MODE_INVITE)
2108 strncat(string, "i", 1);
2110 if (mode & SILC_CHANNEL_MODE_TOPIC)
2111 strncat(string, "t", 1);
2113 if (mode & SILC_CHANNEL_MODE_ULIMIT)
2114 strncat(string, "l", 1);
2116 if (mode & SILC_CHANNEL_MODE_PASSPHRASE)
2117 strncat(string, "a", 1);
2119 /* Rest of mode is ignored */
2121 return strdup(string);
2124 /* Parses channel user mode mask and returns te mode as string */
2126 char *silc_client_chumode(unsigned int mode)
2133 memset(string, 0, sizeof(string));
2135 if (mode & SILC_CHANNEL_UMODE_CHANFO)
2136 strncat(string, "f", 1);
2138 if (mode & SILC_CHANNEL_UMODE_CHANOP)
2139 strncat(string, "o", 1);
2141 return strdup(string);
2144 /* Parses channel user mode and returns it as special mode character. */
2146 char *silc_client_chumode_char(unsigned int mode)
2153 memset(string, 0, sizeof(string));
2155 if (mode & SILC_CHANNEL_UMODE_CHANFO)
2156 strncat(string, "*", 1);
2158 if (mode & SILC_CHANNEL_UMODE_CHANOP)
2159 strncat(string, "@", 1);
2161 return strdup(string);