protected void BeginSendToServer(int length, AsyncSession session, AsyncCallback callback)
{
if (!_serverHeaderSent)
{
_serverHeaderSent = true;
// Append socks5 header
int len = Socks5Util.HeaderAddrLength(_destEndPoint);
Array.Copy(ConnetionRecvBuffer, 0, ConnetionRecvBuffer, len, length);
Socks5Util.FillHeaderAddr(ConnetionRecvBuffer, 0, _destEndPoint);
length += len;
}
_totalWrite += length;
int bytesToSend;
lock (_encryptionLock)
{
_encryptor.Encrypt(ConnetionRecvBuffer, length, _connetionSendBuffer, out bytesToSend);
}
_tcprelay.UpdateOutboundCounter(_server, bytesToSend);
_startSendingTime = DateTime.Now;
session.Remote.BeginSend(_connetionSendBuffer, 0, bytesToSend, SocketFlags.None, callback, session);
IStrategy strategy = _controller.GetCurrentStrategy();
strategy?.UpdateLastWrite(_server);
}
public void BeginConnectDest(EndPoint destEndPoint, AsyncCallback callback, object state)
{
DestEndPoint = destEndPoint;
int len = Socks5Util.HeaderAddrLength(destEndPoint);
byte[] request = new byte[len + 3];
Socks5Util.FillHeaderAddr(request, 3, destEndPoint);
// 构造request包剩余部分
request[0] = 5;
request[1] = 1;
request[2] = 0;
var st = new Socks5State();
st.Callback = callback;
st.AsyncState = state;
_remote.BeginSend(request, 0, request.Length, 0, Socks5RequestSendCallback, st);
}
