rdesktop/trunk/rdpsnd.c

/* 
   rdesktop: A Remote Desktop Protocol client.
   Sound Channel Process Functions
   Copyright (C) Matthew Chapman 2003
   Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include "rdesktop.h"

#define RDPSND_CLOSE            1
#define RDPSND_WRITE            2
#define RDPSND_SET_VOLUME       3
#define RDPSND_UNKNOWN4         4
#define RDPSND_COMPLETION       5
#define RDPSND_UNKNOWN6         6
#define RDPSND_NEGOTIATE        7

#define MAX_FORMATS             10

static VCHANNEL *rdpsnd_channel;

static BOOL device_open;
static WAVEFORMATEX formats[MAX_FORMATS];
static unsigned int format_count;
static unsigned int current_format;

STREAM
rdpsnd_init_packet(uint16 type, uint16 size)
{
        STREAM s;

        s = channel_init(rdpsnd_channel, size+4);
        out_uint16_le(s, type);
        out_uint16_le(s, size);
        return s;
}

void
rdpsnd_send(STREAM s)
{
#ifdef RDPSND_DEBUG
        printf("RDPSND send:\n");
        hexdump(s->channel_hdr+8, s->end-s->channel_hdr-8);
#endif

        channel_send(s, rdpsnd_channel);
}

void rdpsnd_send_completion(uint16 tick, uint8 packet_index)
{
        STREAM s;

        s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
        out_uint16_le(s, tick+50);
        out_uint8(s, packet_index);
        out_uint8(s, 0);
        s_mark_end(s);
        rdpsnd_send(s);
}

void
rdpsnd_process_negotiate(STREAM in)
{
        unsigned int in_format_count, i;
        WAVEFORMATEX *format;
        STREAM out;

        in_uint8s(in, 14);      /* flags, volume, pitch, UDP port */
        in_uint16_le(in, in_format_count);
        in_uint8s(in, 4);       /* pad, status, pad */

        format_count = 0;
        if (s_check_rem(in, 18*in_format_count))
        {
                for (i = 0; i < in_format_count; i++)
                {
                        format = &formats[format_count];
                        in_uint16_le(in, format->wFormatTag);
                        in_uint16_le(in, format->nChannels);
                        in_uint32_le(in, format->nSamplesPerSec);
                        in_uint32_le(in, format->nAvgBytesPerSec);
                        in_uint16_le(in, format->nBlockAlign);
                        in_uint16_le(in, format->wBitsPerSample);
                        in_uint16_le(in, format->cbSize);

                        if (wave_out_format_supported(format))
                        {
                                format_count++;
                                if (format_count == MAX_FORMATS)
                                        break;
                        }
                }
        }

        out = rdpsnd_init_packet(RDPSND_NEGOTIATE | 0x200, 20 + 18*format_count);
        out_uint32_le(out, 3);          /* flags */
        out_uint32(out, 0xffffffff);    /* volume */
        out_uint32(out, 0);             /* pitch */
        out_uint16(out, 0);             /* UDP port */

        out_uint16_le(out, format_count);
        out_uint8(out, 0x95);           /* pad? */
        out_uint16_le(out, 2);          /* status */
        out_uint8(out, 0x77);           /* pad? */

        for (i = 0; i < format_count; i++)
        {
                format = &formats[i];
                out_uint16_le(out, format->wFormatTag);
                out_uint16_le(out, format->nChannels);
                out_uint32_le(out, format->nSamplesPerSec);
                out_uint32_le(out, format->nAvgBytesPerSec);
                out_uint16_le(out, format->nBlockAlign);
                out_uint16_le(out, format->wBitsPerSample);
                out_uint16(out, 0); /* cbSize */
        }

        s_mark_end(out);
        rdpsnd_send(out);
}

void
rdpsnd_process_unknown6(STREAM in)
{
        uint16 unknown1, unknown2;
        STREAM out;

        /* in_uint8s(in, 4); unknown */
        in_uint16_le(in, unknown1);
        in_uint16_le(in, unknown2);

        out = rdpsnd_init_packet(RDPSND_UNKNOWN6 | 0x2300, 4);
        out_uint16_le(out, unknown1);
        out_uint16_le(out, unknown2);
        s_mark_end(out);
        rdpsnd_send(out);
}

void
rdpsnd_process(STREAM s)
{
        uint8 type;
        uint16 datalen;
        static uint16 tick, format;
        static uint8 packet_index;
        static BOOL awaiting_data_packet;

#ifdef RDPSND_DEBUG
        printf("RDPSND recv:\n");
        hexdump(s->p, s->end-s->p);
#endif

        if (awaiting_data_packet)
        {
                if (format >= MAX_FORMATS)
                {
                        error("RDPSND: Invalid format index\n");
                        return;
                }

                if (!device_open || (format != current_format))
                {
                        if (!device_open && !wave_out_open())
                        {
                                rdpsnd_send_completion(tick, packet_index);
                                return;
                        }
                        if (!wave_out_set_format(&formats[format]))
                        {
                                rdpsnd_send_completion(tick, packet_index);
                                wave_out_close();
                                device_open = False;
                                return;
                        }
                        device_open = True;
                        current_format = format;
                }

                wave_out_write(s, tick, packet_index);
                awaiting_data_packet = False;
                return;
        }

        in_uint8(s, type);
        in_uint8s(s, 1); /* unknown? */
        in_uint16_le(s, datalen);

        switch (type)
        {
        case RDPSND_WRITE:
                in_uint16_le(s, tick);
                in_uint16_le(s, format);
                in_uint8(s, packet_index);
                awaiting_data_packet = True;
                break;
        case RDPSND_CLOSE:
                wave_out_close();
                device_open = False;
                break;
        case RDPSND_NEGOTIATE:
                rdpsnd_process_negotiate(s);
                break;
        case RDPSND_UNKNOWN6:
                rdpsnd_process_unknown6(s);
                break;
        case RDPSND_SET_VOLUME:
                /* uint32 volume */
                break;
        default:
                unimpl("RDPSND packet type %d\n", type);
                break;
        }
}

BOOL
rdpsnd_init(void)
{
        rdpsnd_channel =
                channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED | CHANNEL_OPTION_ENCRYPT_RDP,
                                 rdpsnd_process);
        return (rdpsnd_channel != NULL);
}
1	matthewc	474	/*
2			rdesktop: A Remote Desktop Protocol client.
3			Sound Channel Process Functions
4			Copyright (C) Matthew Chapman 2003
5			Copyright (C) GuoJunBo guojunbo@ict.ac.cn 2003
6
7			This program is free software; you can redistribute it and/or modify
8			it under the terms of the GNU General Public License as published by
9			the Free Software Foundation; either version 2 of the License, or
10			(at your option) any later version.
11
12			This program is distributed in the hope that it will be useful,
13			but WITHOUT ANY WARRANTY; without even the implied warranty of
14			MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			GNU General Public License for more details.
16
17			You should have received a copy of the GNU General Public License
18			along with this program; if not, write to the Free Software
19			Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20			*/
21
22	matthewc	432	#include "rdesktop.h"
23
24	matthewc	474	#define RDPSND_CLOSE 1
25			#define RDPSND_WRITE 2
26			#define RDPSND_SET_VOLUME 3
27			#define RDPSND_UNKNOWN4 4
28			#define RDPSND_COMPLETION 5
29			#define RDPSND_UNKNOWN6 6
30			#define RDPSND_NEGOTIATE 7
31
32			#define MAX_FORMATS 10
33
34	matthewc	432	static VCHANNEL *rdpsnd_channel;
35
36	matthewc	474	static BOOL device_open;
37			static WAVEFORMATEX formats[MAX_FORMATS];
38			static unsigned int format_count;
39			static unsigned int current_format;
40
41			STREAM
42			rdpsnd_init_packet(uint16 type, uint16 size)
43			{
44			STREAM s;
45
46			s = channel_init(rdpsnd_channel, size+4);
47			out_uint16_le(s, type);
48			out_uint16_le(s, size);
49			return s;
50			}
51
52			void
53			rdpsnd_send(STREAM s)
54			{
55			#ifdef RDPSND_DEBUG
56			printf("RDPSND send:\n");
57			hexdump(s->channel_hdr+8, s->end-s->channel_hdr-8);
58			#endif
59
60			channel_send(s, rdpsnd_channel);
61			}
62
63			void rdpsnd_send_completion(uint16 tick, uint8 packet_index)
64			{
65			STREAM s;
66
67			s = rdpsnd_init_packet(RDPSND_COMPLETION, 4);
68			out_uint16_le(s, tick+50);
69			out_uint8(s, packet_index);
70			out_uint8(s, 0);
71			s_mark_end(s);
72			rdpsnd_send(s);
73			}
74
75			void
76			rdpsnd_process_negotiate(STREAM in)
77			{
78			unsigned int in_format_count, i;
79			WAVEFORMATEX *format;
80			STREAM out;
81
82			in_uint8s(in, 14); /* flags, volume, pitch, UDP port */
83			in_uint16_le(in, in_format_count);
84			in_uint8s(in, 4); /* pad, status, pad */
85
86			format_count = 0;
87			if (s_check_rem(in, 18*in_format_count))
88			{
89			for (i = 0; i < in_format_count; i++)
90			{
91			format = &formats[format_count];
92			in_uint16_le(in, format->wFormatTag);
93			in_uint16_le(in, format->nChannels);
94			in_uint32_le(in, format->nSamplesPerSec);
95			in_uint32_le(in, format->nAvgBytesPerSec);
96			in_uint16_le(in, format->nBlockAlign);
97			in_uint16_le(in, format->wBitsPerSample);
98			in_uint16_le(in, format->cbSize);
99
100			if (wave_out_format_supported(format))
101			{
102			format_count++;
103			if (format_count == MAX_FORMATS)
104			break;
105			}
106			}
107			}
108
109			out = rdpsnd_init_packet(RDPSND_NEGOTIATE \| 0x200, 20 + 18*format_count);
110			out_uint32_le(out, 3); /* flags */
111			out_uint32(out, 0xffffffff); /* volume */
112			out_uint32(out, 0); /* pitch */
113			out_uint16(out, 0); /* UDP port */
114
115			out_uint16_le(out, format_count);
116			out_uint8(out, 0x95); /* pad? */
117			out_uint16_le(out, 2); /* status */
118			out_uint8(out, 0x77); /* pad? */
119
120			for (i = 0; i < format_count; i++)
121			{
122			format = &formats[i];
123			out_uint16_le(out, format->wFormatTag);
124			out_uint16_le(out, format->nChannels);
125			out_uint32_le(out, format->nSamplesPerSec);
126			out_uint32_le(out, format->nAvgBytesPerSec);
127			out_uint16_le(out, format->nBlockAlign);
128			out_uint16_le(out, format->wBitsPerSample);
129			out_uint16(out, 0); /* cbSize */
130			}
131
132			s_mark_end(out);
133			rdpsnd_send(out);
134			}
135
136			void
137			rdpsnd_process_unknown6(STREAM in)
138			{
139			uint16 unknown1, unknown2;
140			STREAM out;
141
142			/* in_uint8s(in, 4); unknown */
143			in_uint16_le(in, unknown1);
144			in_uint16_le(in, unknown2);
145
146			out = rdpsnd_init_packet(RDPSND_UNKNOWN6 \| 0x2300, 4);
147			out_uint16_le(out, unknown1);
148			out_uint16_le(out, unknown2);
149			s_mark_end(out);
150			rdpsnd_send(out);
151			}
152
153			void
154	matthewc	432	rdpsnd_process(STREAM s)
155			{
156	matthewc	474	uint8 type;
157			uint16 datalen;
158			static uint16 tick, format;
159			static uint8 packet_index;
160			static BOOL awaiting_data_packet;
161
162			#ifdef RDPSND_DEBUG
163			printf("RDPSND recv:\n");
164			hexdump(s->p, s->end-s->p);
165			#endif
166
167			if (awaiting_data_packet)
168			{
169			if (format >= MAX_FORMATS)
170			{
171			error("RDPSND: Invalid format index\n");
172			return;
173			}
174
175			if (!device_open \|\| (format != current_format))
176			{
177			if (!device_open && !wave_out_open())
178			{
179			rdpsnd_send_completion(tick, packet_index);
180			return;
181			}
182			if (!wave_out_set_format(&formats[format]))
183			{
184			rdpsnd_send_completion(tick, packet_index);
185			wave_out_close();
186			device_open = False;
187			return;
188			}
189			device_open = True;
190			current_format = format;
191			}
192
193			wave_out_write(s, tick, packet_index);
194			awaiting_data_packet = False;
195			return;
196			}
197
198			in_uint8(s, type);
199			in_uint8s(s, 1); /* unknown? */
200			in_uint16_le(s, datalen);
201
202			switch (type)
203			{
204			case RDPSND_WRITE:
205			in_uint16_le(s, tick);
206			in_uint16_le(s, format);
207			in_uint8(s, packet_index);
208			awaiting_data_packet = True;
209			break;
210			case RDPSND_CLOSE:
211			wave_out_close();
212			device_open = False;
213			break;
214			case RDPSND_NEGOTIATE:
215			rdpsnd_process_negotiate(s);
216			break;
217			case RDPSND_UNKNOWN6:
218			rdpsnd_process_unknown6(s);
219			break;
220			case RDPSND_SET_VOLUME:
221			/* uint32 volume */
222			break;
223			default:
224			unimpl("RDPSND packet type %d\n", type);
225			break;
226			}
227	matthewc	432	}
228
229			BOOL
230			rdpsnd_init(void)
231			{
232	astrand	435	rdpsnd_channel =
233			channel_register("rdpsnd", CHANNEL_OPTION_INITIALIZED \| CHANNEL_OPTION_ENCRYPT_RDP,
234			rdpsnd_process);
235	matthewc	432	return (rdpsnd_channel != NULL);
236			}