UDP Server Output Packet Information

Work in Progress

Byte Index	bit 7	bit 6	bit 5	bit 4	bit 3	bit 2	bit 1	bit 0
[0-3]	"DSUS"
[4-5]	Protocol Version (1001)
[6-7]	Buffer Length (84)
[8-11]	CRC32
[12-15]	Server Id
[16-19]	PadDataRsp (0x1000002)
[20]	PadId (0 - 3)
[21]	PadState
[22]	Model
[23]	Connection Type
[24-29]	Mac Address
[30]	Battery Status
[31]	Pad IsActive (0,1)
[32-35]	Hid Report Packet Counter
[36]	Dpad Left	Dpad Down	Dpad Right	Dpad Up	Options	R3	L3	Share
[37]	Square	Cross	Circle	Triangle	R1	L1	R2Btn	L2Btn
[38]	PS
[39]	Touch Button
[40]	Left Stick X
[41]	Left Stick Y Inverted
[42]	Right Stick X
[43]	Right Stick Y Inverted
[44]	DPad Left Button
[45]	DPad Down Button
[46]	DPad Right Button
[47]	DPad Up Button
[48]	Square Button
[49]	Cross Button
[50]	Circle Button
[51]	Triangle Button
[52]	R1 Button
[53]	L1 Button
[54]	R2
[55]	L2
[56]	Touch 1 Active
[57]	Touch 1 Id
[58-59]	Touch 1 X
[60-61]	Touch 1 Y
[62]	Touch 2 Active
[63]	Touch 2 Id
[64-65]	Touch 2 X
[66-67]	Touch 2 Y
[68-75]	Total Micro Seconds
[76-79]	Accelerometer X
[80-83]	Accelerometer Y
[84-87]	Accelerometer Z Inverted
[88-91]	Gyro Angular Velocity Pitch
[92-95]	Gyro Angular Velocity Yaw
[96-99]	Gyro Angular Velocity Roll

Struct based version

For ease of use and better documentation, a struct based message handler is now used in DS4Windows. The information is placed in a defined struct and then copied over to a byte array that is then transmitted. The struct based version is slightly faster due to some design choices but I am sure the older array based version can be improved.

[StructLayout(LayoutKind.Explicit, Size = 100)]
unsafe struct PadDataRspPacket
{
    // Header section
    [FieldOffset(0)]
    public fixed byte initCode[4];
    [FieldOffset(4)]
    public ushort protocolVersion;
    [FieldOffset(6)]
    public ushort messageLen;
    [FieldOffset(8)]
    public int crc;
    [FieldOffset(12)]
    public uint serverId;
    [FieldOffset(16)]
    public uint messageType;

    // Pad meta section
    [FieldOffset(20)]
    public byte padId;
    [FieldOffset(21)]
    public byte padState;
    [FieldOffset(22)]
    public byte model;
    [FieldOffset(23)]
    public byte connectionType;
    [FieldOffset(24)]
    public fixed byte address[6];
    [FieldOffset(30)]
    public byte batteryStatus;
    [FieldOffset(31)]
    public byte isActive;
    [FieldOffset(32)]
    public uint packetCounter;

    // Primary controls
    [FieldOffset(36)]
    public byte buttons1;
    [FieldOffset(37)]
    public byte buttons2;
    [FieldOffset(38)]
    public byte psButton;
    [FieldOffset(39)]
    public byte touchButton;
    [FieldOffset(40)]
    public byte lx;
    [FieldOffset(41)]
    public byte ly;
    [FieldOffset(42)]
    public byte rx;
    [FieldOffset(43)]
    public byte ry;
    [FieldOffset(44)]
    public byte dpadLeft;
    [FieldOffset(45)]
    public byte dpadDown;
    [FieldOffset(46)]
    public byte dpadRight;
    [FieldOffset(47)]
    public byte dpadUp;
    [FieldOffset(48)]
    public byte square;
    [FieldOffset(49)]
    public byte cross;
    [FieldOffset(50)]
    public byte circle;
    [FieldOffset(51)]
    public byte triangle;
    [FieldOffset(52)]
    public byte r1;
    [FieldOffset(53)]
    public byte l1;
    [FieldOffset(54)]
    public byte r2;
    [FieldOffset(55)]
    public byte l2;

    // Touch 1
    [FieldOffset(56)]
    public byte touch1Active;
    [FieldOffset(57)]
    public byte touch1PacketId;
    [FieldOffset(58)]
    public ushort touch1X;
    [FieldOffset(60)]
    public ushort touch1Y;

    // Touch 2
    [FieldOffset(62)]
    public byte touch2Active;
    [FieldOffset(63)]
    public byte touch2PacketId;
    [FieldOffset(64)]
    public ushort touch2X;
    [FieldOffset(66)]
    public ushort touch2Y;

    // Accel
    [FieldOffset(68)]
    public ulong totalMicroSec;
    [FieldOffset(76)]
    public float accelXG;
    [FieldOffset(80)]
    public float accelYG;
    [FieldOffset(84)]
    public float accelZG;

    // Gyro
    [FieldOffset(88)]
    public float angVelPitch;
    [FieldOffset(92)]
    public float angVelYaw;
    [FieldOffset(96)]
    public float angVelRoll;
}

https://github.com/Ryochan7/DS4Windows/blob/ef6f5b1d2f8337e48a3f2c00025b007175662094/DS4Windows/DS4Control/UdpServer.cs#L68