public bool Handshake(byte[] hash, byte[] peerId)
{
if (hash == null)
{
throw new ArgumentNullException(nameof(hash), "Hash cannot be null");
}
if (peerId == null)
{
throw new ArgumentNullException(nameof(peerId), "Peer ID cannot be null");
}
if (hash.Length != 20)
{
throw new ArgumentOutOfRangeException(nameof(hash), "hash must be 20 bytes exactly");
}
if (peerId.Length != 20)
{
throw new ArgumentOutOfRangeException(nameof(peerId), "Peer ID must be 20 bytes exactly");
}
byte[] reservedBytes = { 0, 0, 0, 0, 0, 0, 0, 0 };
foreach (var extension in _btProtocolExtensions)
{
for (var x = 0; x < 8; x++)
{
reservedBytes[x] |= extension.ByteMask[x];
}
}
var sendBuf = (new[] { (byte)_bitTorrentProtocolHeader.Length }).Cat(_bitTorrentProtocolHeader).Cat(reservedBytes).Cat(hash).Cat(peerId);
try
{
var len = Socket.Send(sendBuf);
if (len != sendBuf.Length)
{
throw new Exception("Didnt sent entire handshake");
}
}
catch (SocketException ex)
{
Trace.TraceInformation(ex.Message);
return(false);
}
foreach (IProtocolExtension extension in _btProtocolExtensions)
{
extension.OnHandshake(this);
}
_handshakeSent = true;
return(true);
}
