func DecodePacket()

in ptp/protocol/protocol.go [416:451]

• 35 lines of code
• 12 McCabe index (conditional complexity)

func DecodePacket(b []byte) (Packet, error) {
	r := bytes.NewReader(b)
	head := &Header{}
	if err := binary.Read(r, binary.BigEndian, head); err != nil {
		return nil, err
	}
	msgType := head.MessageType()
	var p Packet
	switch msgType {
	case MessageSync, MessageDelayReq:
		p = &SyncDelayReq{}
	case MessagePDelayReq:
		p = &PDelayReq{}
	case MessagePDelayResp:
		p = &PDelayResp{}
	case MessageFollowUp:
		p = &FollowUp{}
	case MessageDelayResp:
		p = &DelayResp{}
	case MessagePDelayRespFollowUp:
		p = &PDelayRespFollowUp{}
	case MessageAnnounce:
		p = &Announce{}
	case MessageSignaling:
		p = &Signaling{}
	case MessageManagement:
		return decodeMgmtPacket(b)
	default:
		return nil, fmt.Errorf("unsupported type %s", msgType)
	}

	if err := FromBytes(b, p); err != nil {
		return nil, err
	}
	return p, nil
}