public override void ReadRequest(NetworkPacket packet)
{
segmentLen = 0;
startPos = packet.ReadUInt();
//first stream segment
if (startPos == 0)
{
uint totalBytes = packet.ReadUInt();
command = packet.ReadString();
byteData = new byte[totalBytes];
segmentLen = packet.ReadUInt();
byte[] bytes = packet.ReadBytes((int)segmentLen);
SetBuffer(bytes, 0);
return;
}
//subsequent stream segments
segmentLen = packet.ReadUInt();
byteData = packet.ReadBytes((int)segmentLen);
}
public override void ReadResponse(NetworkPacket packet)
{
methodId = (ushort)((uint)packet.ReadUShort() & 0x3FFF); //0x3F (0011 1111) sets left most 2 bits to 00
methodLength = packet.ReadUShort();
transactionID = packet.ReadBytes(16);
header.ackkey = BitConverter.ToUInt32(transactionID, 0);
method = (STUNMethod)methodId;
//Console.WriteLine("STUN Response address: " + packet.remoteEndPoint.ToString());
//Console.WriteLine("STUN Response Method: " + Enum.GetName(typeof(STUNMethod), method));
//Console.WriteLine("STUN Response Length: " + methodLength);
while (packet.bytePos < packet.byteLength)
{
STUNAddress address;
STUNAttribute attrType = (STUNAttribute)packet.ReadUShort();
attributeTypes.Add(attrType);
//Console.WriteLine("STUN Attr Type: " + Enum.GetName(typeof(STUNAttribute), attrType));
switch (attrType)
{
case STUNAttribute.MappedAddress:
case STUNAttribute.SourceAddress:
case STUNAttribute.ChangedAddress:
address = ReadMappedAddress(packet);
response.Add(attrType, address);
break;
case STUNAttribute.XorMappedAddress:
case STUNAttribute.XorRelayedAddress:
address = ReadXorMappedAddress(packet);
response.Add(attrType, address);
break;
case STUNAttribute.ErrorCode:
response.Add(attrType, ReadErrorCode(packet));
break;
case STUNAttribute.UnknownAttribute:
response.Add(attrType, ReadUnknownAttributes(packet));
break;
case STUNAttribute.ServerName:
response.Add(attrType, ReadString(packet));
break;
case STUNAttribute.Realm:
response.Add(attrType, ReadString(packet));
break;
case STUNAttribute.Username:
response.Add(attrType, ReadString(packet));
break;
default:
ushort attrLen = packet.ReadUShort();
byte[] bytes = packet.ReadBytes(attrLen);
response.Add(attrType, bytes);
while (((attrLen++) % 4) != 0)
{
packet.ReadByte();
}
break;
}
}
}
