[TheDominis]

I suggest looking into the WPILib\NetworkCommunication\FRCComm.h

I have reproduced it in this post.

It contains the struct that is passed along the network. You must swap intrinsic data type from big to little endian. You shouldn't have to swap byte arrays unless intrinsic data is converted to a byte array.

struct FRCCommonControlData{
	UINT16 packetIndex;
	union {
		UINT8 control;
		struct {
			UINT8 reset : 1;
			UINT8 notEStop : 1;
			UINT8 enabled : 1;
			UINT8 autonomous : 1;
			UINT8 fmsAttached:1;
			UINT8 resync : 1;
			UINT8 cRIOChkSum :1;
			UINT8 fpgaChkSum :1;
		};
	};
	UINT8 dsDigitalIn;
	UINT16 teamID;

	char dsID_Alliance;
	char dsID_Position;

	union {
		INT8 stick0Axes[6];
		struct {
			INT8 stick0Axis1;
			INT8 stick0Axis2;
			INT8 stick0Axis3;
			INT8 stick0Axis4;
			INT8 stick0Axis5;
			INT8 stick0Axis6;
		};
	};
	UINT16 stick0Buttons;		// Left-most 4 bits are unused

	union {
		INT8 stick1Axes[6];
		struct {
			INT8 stick1Axis1;
			INT8 stick1Axis2;
			INT8 stick1Axis3;
			INT8 stick1Axis4;
			INT8 stick1Axis5;
			INT8 stick1Axis6;
		};
	};
	UINT16 stick1Buttons;		// Left-most 4 bits are unused

	union {
		INT8 stick2Axes[6];
		struct {
			INT8 stick2Axis1;
			INT8 stick2Axis2;
			INT8 stick2Axis3;
			INT8 stick2Axis4;
			INT8 stick2Axis5;
			INT8 stick2Axis6;
		};
	};
	UINT16 stick2Buttons;		// Left-most 4 bits are unused

	union {
		INT8 stick3Axes[6];
		struct {
			INT8 stick3Axis1;
			INT8 stick3Axis2;
			INT8 stick3Axis3;
			INT8 stick3Axis4;
			INT8 stick3Axis5;
			INT8 stick3Axis6;
		};
	};
	UINT16 stick3Buttons;		// Left-most 4 bits are unused

	//Analog inputs are 10 bit right-justified
	UINT16 analog1;
	UINT16 analog2;
	UINT16 analog3;
	UINT16 analog4;

	UINT64 cRIOChecksum;
	UINT32 FPGAChecksum0;
	UINT32 FPGAChecksum1;
	UINT32 FPGAChecksum2;
	UINT32 FPGAChecksum3;

	char versionData[8];
};