func()

in ptp/protocol/management.go [173:211]

• 36 lines of code
• 10 McCabe index (conditional complexity)

func (p *ManagementMsgErrorStatus) UnmarshalBinary(rawBytes []byte) error {
	reader := bytes.NewReader(rawBytes)
	be := binary.BigEndian
	if err := binary.Read(reader, be, &p.ManagementMsgHead); err != nil {
		return fmt.Errorf("reading ManagementMsgErrorStatus ManagementMsgHead: %w", err)
	}
	if err := binary.Read(reader, be, &p.ManagementErrorStatusTLV.TLVHead); err != nil {
		return fmt.Errorf("reading ManagementMsgErrorStatus TLVHead: %w", err)
	}
	if err := binary.Read(reader, be, &p.ManagementErrorStatusTLV.ManagementErrorID); err != nil {
		return fmt.Errorf("reading ManagementMsgErrorStatus ManagementErrorID: %w", err)
	}
	if err := binary.Read(reader, be, &p.ManagementErrorStatusTLV.ManagementID); err != nil {
		return fmt.Errorf("reading ManagementMsgErrorStatus ManagementID: %w", err)
	}
	if err := binary.Read(reader, be, &p.ManagementErrorStatusTLV.Reserved); err != nil {
		return fmt.Errorf("reading ManagementMsgErrorStatus Reserved: %w", err)
	}
	// packet can have trailing bytes, let's make sure we don't try to read past given length
	toRead := int(p.ManagementMsgHead.Header.MessageLength)
	toRead -= binary.Size(p.ManagementMsgHead)
	toRead -= binary.Size(p.ManagementErrorStatusTLV.TLVHead)
	toRead -= binary.Size(p.ManagementErrorStatusTLV.ManagementErrorID)
	toRead -= binary.Size(p.ManagementErrorStatusTLV.ManagementID)
	toRead -= binary.Size(p.ManagementErrorStatusTLV.Reserved)

	if reader.Len() == 0 || toRead <= 0 {
		// DisplayData is completely optional
		return nil
	}
	data := make([]byte, reader.Len())
	if _, err := io.ReadFull(reader, data); err != nil {
		return err
	}
	if err := p.DisplayData.UnmarshalBinary(data); err != nil {
		return fmt.Errorf("reading ManagementMsgErrorStatus DisplayData: %w", err)
	}
	return nil
}