guacamole-spice-protocol/src/protocols/rdp/guac_rdpsnd/rdpsnd_service.c

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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
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*
* The Original Code is libguac-client-rdp.
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*
* The Initial Developer of the Original Code is
* Michael Jumper.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
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#include <stdlib.h>
#include <string.h>
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#include <freerdp/constants.h>
#include <freerdp/types.h>
#include <freerdp/utils/svc_plugin.h>
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#ifdef ENABLE_WINPR
#include <winpr/stream.h>
#include <winpr/wtypes.h>
#else
#include "compat/winpr-stream.h"
#include "compat/winpr-wtypes.h"
#endif
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#include <guacamole/client.h>
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#include "audio.h"
#include "rdpsnd_service.h"
#include "rdpsnd_messages.h"
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/**
* Entry point for RDPSND virtual channel.
*/
int VirtualChannelEntry(PCHANNEL_ENTRY_POINTS pEntryPoints) {
/* Allocate plugin */
guac_rdpsndPlugin* rdpsnd =
(guac_rdpsndPlugin*) calloc(1, sizeof(guac_rdpsndPlugin));
/* Init channel def */
strcpy(rdpsnd->plugin.channel_def.name, "rdpsnd");
rdpsnd->plugin.channel_def.options =
CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP;
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/* Set callbacks */
rdpsnd->plugin.connect_callback = guac_rdpsnd_process_connect;
rdpsnd->plugin.receive_callback = guac_rdpsnd_process_receive;
rdpsnd->plugin.event_callback = guac_rdpsnd_process_event;
rdpsnd->plugin.terminate_callback = guac_rdpsnd_process_terminate;
/* Finish init */
svc_plugin_init((rdpSvcPlugin*) rdpsnd, pEntryPoints);
return 1;
}
/*
* Service Handlers
*/
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void guac_rdpsnd_process_connect(rdpSvcPlugin* plugin) {
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/* Get audio stream from plugin */
audio_stream* audio = (audio_stream*)
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plugin->channel_entry_points.pExtendedData;
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#ifdef RDPSVCPLUGIN_INTERVAL_MS
/* Update every 10 ms */
plugin->interval_ms = 10;
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#endif
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/* Log that sound has been loaded */
guac_client_log_info(audio->client, "guacsnd connected.");
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}
void guac_rdpsnd_process_terminate(rdpSvcPlugin* plugin) {
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free(plugin);
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}
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void guac_rdpsnd_process_event(rdpSvcPlugin* plugin, wMessage* event) {
freerdp_event_free(event);
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}
void guac_rdpsnd_process_receive(rdpSvcPlugin* plugin,
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wStream* input_stream) {
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guac_rdpsndPlugin* rdpsnd = (guac_rdpsndPlugin*) plugin;
guac_rdpsnd_pdu_header header;
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/* Get audio stream from plugin */
audio_stream* audio = (audio_stream*)
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plugin->channel_entry_points.pExtendedData;
/* Read RDPSND PDU header */
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Stream_Read_UINT8(input_stream, header.message_type);
Stream_Seek_UINT8(input_stream);
Stream_Read_UINT16(input_stream, header.body_size);
/*
* If next PDU is SNDWAVE (due to receiving WaveInfo PDU previously),
* ignore the header and parse as a Wave PDU.
*/
if (rdpsnd->next_pdu_is_wave) {
guac_rdpsnd_wave_handler(rdpsnd, audio, input_stream, &header);
return;
}
/* Dispatch message to standard handlers */
switch (header.message_type) {
/* Server Audio Formats and Version PDU */
case SNDC_FORMATS:
guac_rdpsnd_formats_handler(rdpsnd, audio,
input_stream, &header);
break;
/* Training PDU */
case SNDC_TRAINING:
guac_rdpsnd_training_handler(rdpsnd, audio,
input_stream, &header);
break;
/* WaveInfo PDU */
case SNDC_WAVE:
guac_rdpsnd_wave_info_handler(rdpsnd, audio,
input_stream, &header);
break;
/* Close PDU */
case SNDC_CLOSE:
guac_rdpsnd_close_handler(rdpsnd, audio,
input_stream, &header);
break;
}
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}