public static DiscoveryPacket ReadPacket(byte[] data)
{
DiscoveryPacket res = new DiscoveryPacket();
res.IsValid = false;
try
{
using (BinaryReader buf = new BinaryReader(new MemoryStream(data)))
{
ushort shortHeaderValue = buf.ReadUInt16();
if (shortHeaderValue != BBProtocol.PROTOCOL_HEADER)
{
res.ParseError = "Protocol header mismatch, not a packet we are looking for";
return(res);
}
ushort nPacketSize = buf.ReadUInt16();
byte byOpcode = buf.ReadByte();
if (nPacketSize > buf.BaseStream.Length - buf.BaseStream.Position)
{
res.ParseError = "Packet size smaller than expected, discard";
return(res);
}
else if (nPacketSize > BBProtocol.MAX_DISCPACKETSIZE_WITHOUTHEADER)
{
res.ParseError = "Packet size above max, discard";
return(res);
}
switch (byOpcode)
{
case BBProtocol.OP_DISCOVERY_ANSWER:
{
res.m_byOpcode = byOpcode;
DiscoveryPacket_Answer dpAnswer = new DiscoveryPacket_Answer(res);
dpAnswer.ProcessData(buf);
return(dpAnswer);
}
default:
{
res.ParseError = "Opcode unsupported";
return(res);
}
}
}
}
catch (IOException e)
{
res.ParseError = "Exception while reading packet: " + e.Message;
return(res);
}
}
protected DiscoveryPacket(DiscoveryPacket src)
{
IsValid = src.IsValid;
m_byOpcode = src.m_byOpcode;
ParseError = src.ParseError;
}
internal DiscoveryPacket_Answer(DiscoveryPacket src) : base(src)
{
}
