public static UdpPacket Decode(Stream stream)
{
EndianBinaryReader endianBinaryReader = stream != null?stream.CreateSuitableBinaryReader() : throw new ArgumentNullException(nameof(stream));
short num1 = endianBinaryReader.ReadInt16();
short num2 = endianBinaryReader.ReadInt16();
UdpPacketType udpPacketType = (UdpPacketType)endianBinaryReader.ReadByte();
byte num3 = endianBinaryReader.ReadByte();
switch (udpPacketType)
{
case UdpPacketType.DataReqAck:
case UdpPacketType.DataNotReqAck:
if (num1 == 5)
{
byte num4 = endianBinaryReader.ReadByte();
UdpPacket udpPacket1 = new UdpPacket();
udpPacket1.Id = num2;
udpPacket1.Type = udpPacketType;
UdpPacket udpPacket2 = udpPacket1;
UdpResponse udpResponse1 = new UdpResponse();
udpResponse1.AvlPacketId = num3;
udpResponse1.AcceptedNum = num4;
UdpResponse udpResponse2 = udpResponse1;
udpPacket2.Payload = udpResponse2;
return(udpPacket1);
}
string s = ImeiEncoding.Decode(stream);
int count = num1 - 2 - 1 - 1 - (2 + ImeiEncoding.Encoding.GetByteCount(s));
byte[] numArray = endianBinaryReader.ReadBytes(count);
UdpPacket udpPacket3 = new UdpPacket();
udpPacket3.Id = num2;
udpPacket3.Type = udpPacketType;
UdpPacket udpPacket4 = udpPacket3;
UdpData udpData1 = new UdpData();
udpData1.AvlPacketId = num3;
udpData1.Imei = s;
udpData1.Data = numArray;
UdpData udpData2 = udpData1;
udpPacket4.Payload = udpData2;
return(udpPacket3);
case UdpPacketType.Ack:
endianBinaryReader.ReadByte();
return(new UdpPacket()
{
Id = num2,
Type = udpPacketType,
Payload = null
});
default:
throw new ApplicationException("Not supported packet type");
}
}
public static void Encode(UdpPacket packet, Stream stream)
{
if (packet == null)
{
throw new ArgumentNullException(nameof(packet));
}
EndianBinaryWriter endianBinaryWriter = stream != null?stream.CreateSuitableBinaryWriter() : throw new ArgumentNullException(nameof(stream));
switch (packet.Type)
{
case UdpPacketType.DataReqAck:
case UdpPacketType.DataNotReqAck:
UdpData payload1 = packet.Payload as UdpData;
if (payload1 != null)
{
int num = 6 + ImeiEncoding.Encoding.GetByteCount(payload1.Imei) + payload1.Data.Length;
endianBinaryWriter.Write((short)num);
endianBinaryWriter.Write(packet.Id);
endianBinaryWriter.Write((byte)packet.Type);
endianBinaryWriter.Write(payload1.AvlPacketId);
endianBinaryWriter.Write(ImeiEncoding.Encode(payload1.Imei));
endianBinaryWriter.Write(payload1.Data);
break;
}
UdpResponse payload2 = packet.Payload as UdpResponse;
if (payload2 == null)
{
throw new InvalidOperationException("Payload");
}
endianBinaryWriter.Write((short)5);
endianBinaryWriter.Write(packet.Id);
endianBinaryWriter.Write((byte)packet.Type);
endianBinaryWriter.Write(payload2.AvlPacketId);
endianBinaryWriter.Write(payload2.AcceptedNum);
break;
case UdpPacketType.Ack:
if (packet.Payload as UdpResponse == null)
{
throw new InvalidOperationException("UdpAck");
}
endianBinaryWriter.Write((short)3);
endianBinaryWriter.Write(packet.Id);
endianBinaryWriter.Write((byte)packet.Type);
break;
default:
throw new ApplicationException("Not supported packet type");
}
endianBinaryWriter.Flush();
}