/// <summary>
/// Serializes the packet and returns the packed information
/// to the caller.
/// </summary>
/// <exception cref="System.ArgumentException">Thrown when the packet was corrupt</exception>
/// <returns>The serialized packet</returns>
public byte[] Serialize()
{
// First check if this packet is corrupt
if (Corrupted)
{
throw new ArgumentException("StreamPacket: Trying to serialize a corrupt packet.");
}
// Calculate the necessary packet size
byte[] buffer = new byte[HEADER_BIT_SIZE / 8 + Data.Length];
// ----------------------------------------------------
// 1. Serialize the version
// ----------------------------------------------------
buffer[0] = ProtocolVersion;
// ----------------------------------------------------
// 2. Serialize the flags
// ----------------------------------------------------
buffer[1] = _flags;
// ----------------------------------------------------
// 3. Serialize the checksum
// ----------------------------------------------------
Array.Copy(BitConverter.GetBytes(_checksum), 0, buffer, 2, 2);
// ----------------------------------------------------
// 4. Serialize the type
// ----------------------------------------------------
Array.Copy(BitConverter.GetBytes((int)Type), 0, buffer, 4, 4);
// ----------------------------------------------------
// 5. Serialize the source address
// ----------------------------------------------------
Array.Copy(AddrStructureConvert.GetBytes(Source), 0, buffer, 8, 32);
// ----------------------------------------------------
// 6. Serialize the destination address
// ----------------------------------------------------
Array.Copy(AddrStructureConvert.GetBytes(Destination), 0, buffer, 40, 32);
// ----------------------------------------------------
// 7. Serialize the size of the payload
// ----------------------------------------------------
Array.Copy(BitConverter.GetBytes(Data.Length), 0, buffer, 72, 4);
// ----------------------------------------------------
// 8. Serialize the data
// ----------------------------------------------------
Array.Copy(Data, 0, buffer, 76, Data.Length);
return(buffer);
}
/// <summary>
/// Deserialize a new message from a given stream. Rethrows an IOException or
/// ArgumentException to the caller.
/// </summary>
/// <exception cref="System.ArgumentException">Thrown when the argument was invalid</exception>
/// <exception cref="System.IO.IOException">Thrown when the I/O failed</exception>
/// <param name="stream"></param>
public void Deserialize(Stream stream)
{
try
{
byte[] buffer = new byte[32];
// ----------------------------------------------------
// 1. Read the version
// ----------------------------------------------------
int bytes = stream.Read(buffer, 0, 1);
if (bytes != 1)
{
return;
}
ProtocolVersion = buffer[0];
// ----------------------------------------------------
// 2. Read the flags
// ----------------------------------------------------
bytes = stream.Read(buffer, 0, 1);
if (bytes != 1)
{
return;
}
_flags = buffer[0];
// ----------------------------------------------------
// 3. Read the checksum
// ----------------------------------------------------
bytes = stream.Read(buffer, 0, 2);
if (bytes != 2)
{
return;
}
_checksum = BitConverter.ToUInt16(buffer, 0);
// ----------------------------------------------------
// 4. Read the type
// ----------------------------------------------------
bytes = stream.Read(buffer, 0, 4);
if (bytes != 4)
{
return;
}
Type = (PacketType)Enum.ToObject(typeof(PacketType), BitConverter.ToUInt32(buffer, 0));
bool blnIsExist = Enum.IsDefined(typeof(PacketType), Type);
if (!blnIsExist)
{
return;
}
// ----------------------------------------------------
// 5. Read the source address
// ----------------------------------------------------
bytes = stream.Read(buffer, 0, 32);
if (bytes != 32)
{
return;
}
Source = AddrStructureConvert.GetEndPoint(buffer);
// ----------------------------------------------------
// 6. Read the destination address
// ----------------------------------------------------
bytes = stream.Read(buffer, 0, 32);
if (bytes != 32)
{
return;
}
Destination = AddrStructureConvert.GetEndPoint(buffer);
// ----------------------------------------------------
// 7. Read the size of the payload
// ----------------------------------------------------
bytes = stream.Read(buffer, 0, 4);
if (bytes != 4)
{
return;
}
int size = BitConverter.ToInt32(buffer, 0);
// ----------------------------------------------------
// 8. Read the data
// ----------------------------------------------------
_data = new byte[size];
if (size != 0)
{
bytes = stream.Read(_data, 0, size);
if (bytes != size)
{
return;
}
}
}
catch
{
throw; // Rethrow any exception
}
}