static void Main(string[] args)
{
if (!_TheFlagCanBeCapturedWithoutReversing())
{
return;
}
Console.WriteLine("Transmitting flag...");
var ipe = new IPEndPoint(IPAddress.Broadcast, 6969);
var c = new UdpClient {
EnableBroadcast = true
};
while (true)
{
for (int i = 0; i < _indexes.Length; i++)
{
var p = new FlagPacket()
{
SequenceSize = (byte)_indexes.Length,
SequenceNumber = _indexes[i],
FlagByte = _pieces[i]
};
var b = p.ToBytes();
c.Send(b, b.Length, ipe);
Thread.Sleep(500);
}
}
}
public static FlagPacket FromBytes(byte[] bytes)
{
if (bytes.Length < 7)
{
return(null);
}
var magicNumbers = Encoding.ASCII.GetString(bytes.Take(4).ToArray());
if (magicNumbers != "flag")
{
return(null);
}
var p = new FlagPacket()
{
SequenceSize = bytes[5],
SequenceNumber = bytes[6],
FlagByte = bytes[7]
};
return(p);
}