public async ValueTask WriteAsync(ReadOnlyMemory <byte> buffer)
{
var packData = UdpPackData.Parse(buffer);
if (!_addressMap.TryGetValue(packData.Remote, out var endPoint))
{
if (IPAddress.TryParse(packData.Remote.Address, out var address))
{
endPoint = new IPEndPoint(address, packData.Remote.Port);
}
else
{
foreach (var addr in await Dns.GetHostAddressesAsync(packData.Remote.Address))
{
if (addr.AddressFamily == AddressFamily.InterNetwork)
{
address = addr;
break;
}
}
endPoint = new IPEndPoint(address, packData.Remote.Port);
}
_addressMap.TryAdd(packData.Remote, endPoint);
_endPointMap.TryAdd(endPoint, packData.Remote);
}
await _udp.SendAsync(packData.Data, packData.Data.Length, endPoint);
lastRemote = packData.Remote;
}
public static Socks5UdpRelayRequest Parse(byte[] buffer)
{
var result = new Socks5UdpRelayRequest
{
Frag = buffer[2],
Data = UdpPackData.Parse(new ReadOnlyMemory <byte>(buffer, 3, buffer.Length - 3))
};
return(result);
}
