header.go
func (h *Header) UnmarshalBinary(b []byte) error {
	// Must contain minimum length for header
	if len(b) < headerLen {
		return io.ErrUnexpectedEOF
	}

	// Version must indicate Version constant (1, at time of writing)
	h.Version = uint8(b[0] >> 4)
	if h.Version != Version {
		return ErrorUnsupportedVersion
	}

	// Flags occupy bits 5 and 6 of first byte
	h.FlagResponse = (b[0] & 0x08) != 0
	h.FlagError = (b[0] & 0x04) != 0

	// Retrieve other fields stored in network byte order
	h.Error = Error(b[1])
	h.Major = binary.BigEndian.Uint16(b[2:4])
	h.Minor = b[4]
	h.Command = Command(b[5])

	tag := [4]byte{}
	copy(tag[:], b[6:10])
	h.Tag = tag

	// Determine Arg type using Command
	var a Arg
	switch h.Command {
	case CommandIssueATACommand:
		a = new(ATAArg)
	case CommandQueryConfigInformation:
		a = new(ConfigArg)
	case CommandMACMaskList:
		a = new(MACMaskArg)
	case CommandReserveRelease:
		a = new(ReserveReleaseArg)
	default:
		// Unknown Command type
		return ErrorUnrecognizedCommandCode
	}

	// Unmarshal Arg as proper type; this may also return io.ErrUnexpectedEOF
	// or other errors
	if err := a.UnmarshalBinary(b[10:]); err != nil {
		return err
	}
	h.Arg = a

	return nil
}
func (h *Header) UnmarshalBinary(b []byte) error {
	// Must contain minimum length for header
	if len(b) < headerLen {
		return io.ErrUnexpectedEOF
	}

	// Version must indicate Version constant (1, at time of writing)
	h.Version = uint8(b[0] >> 4)
	if h.Version != Version {
		return ErrorUnsupportedVersion
	}

	// Flags occupy bits 5 and 6 of first byte
	h.FlagResponse = (b[0] & 0x08) != 0
	h.FlagError = (b[0] & 0x04) != 0

	// Retrieve other fields stored in network byte order
	h.Error = Error(b[1])
	h.Major = binary.BigEndian.Uint16(b[2:4])
	h.Minor = b[4]
	h.Command = Command(b[5])

	tag := [4]byte{}
	copy(tag[:], b[6:10])
	h.Tag = tag

	// Determine Arg type using Command
	var a Arg
	switch h.Command {
	case CommandIssueATACommand:
		a = new(ATAArg)
	case CommandQueryConfigInformation:
		a = new(ConfigArg)
	case CommandMACMaskList:
		a = new(MACMaskArg)
	case CommandReserveRelease:
		a = new(ReserveReleaseArg)
	default:
		// Unknown Command type
		return ErrorUnrecognizedCommandCode
	}

	// Unmarshal Arg as proper type; this may also return io.ErrUnexpectedEOF
	// or other errors
	if err := a.UnmarshalBinary(b[10:]); err != nil {
		return err
	}
	h.Arg = a

	return nil
}
func ( h * Header ) UnmarshalBinary ( b [ ] byte ) error { // Must contain minimum length for header if len ( b ) < headerLen { return io . ErrUnexpectedEOF } // Version must indicate Version constant (1, at time of writing) h . Version = uint8 ( b [ 0 ] >> 4 ) if h . Version != Version { return ErrorUnsupportedVersion } // Flags occupy bits 5 and 6 of first byte h . FlagResponse = ( b [ 0 ] & 0x08 ) != 0 h . FlagError = ( b [ 0 ] & 0x04 ) != 0 // Retrieve other fields stored in network byte order h . Error = Error ( b [ 1 ] ) h . Major = binary . BigEndian . Uint16 ( b [ 2 : 4 ] ) h . Minor = b [ 4 ] h . Command = Command ( b [ 5 ] ) tag := [ 4 ] byte { } copy ( tag [ : ] , b [ 6 : 10 ] ) h . Tag = tag // Determine Arg type using Command var a Arg switch h . Command { case CommandIssueATACommand : a = new ( ATAArg ) case CommandQueryConfigInformation : a = new ( ConfigArg ) case CommandMACMaskList : a = new ( MACMaskArg ) case CommandReserveRelease : a = new ( ReserveReleaseArg ) default : // Unknown Command type return ErrorUnrecognizedCommandCode } // Unmarshal Arg as proper type; this may also return io.ErrUnexpectedEOF // or other errors if err := a . UnmarshalBinary ( b [ 10 : ] ) ; err != nil { return err } h . Arg = a return nil }
// UnmarshalBinary unmarshals a byte slice into a Header.
//
// If the byte slice does not contain enough data to form a valid Header,
// or an argument is malformed, io.ErrUnexpectedEOF is returned.
//
// If the AoE version detected is not equal to the Version constant (1),
// ErrorUnsupportedVersion is returned.
//
// If an unknown Command type is present, ErrorUnrecognizedCommandCode is
// returned.
UnmarshalBinary unmarshals a byte slice into a Header . If the byte slice does not contain enough data to form a valid Header or an argument is malformed io . ErrUnexpectedEOF is returned . If the AoE version detected is not equal to the Version constant ( 1 ) ErrorUnsupportedVersion is returned . If an unknown Command type is present ErrorUnrecognizedCommandCode is returned .