void checkDstOnline(link l)
{
string dst_ip = null;
if (!sl.linked)
{
throw new Exception("您已离线.");
}
sl.query4IP(l.dst_username, out dst_ip);
IPAddress addr = IPAddress.Parse(dst_ip);
IPEndPoint endpoint = new IPEndPoint(addr, common.p2p_port);
if (!l.linked)
{
bool done = false;
l.sendSocket.BeginConnect(endpoint.Address, endpoint.Port,
new AsyncCallback((IAsyncResult ar) =>
{
done = true;
Socket s = (Socket)ar.AsyncState;
s.EndConnect(ar);
}), l.sendSocket);
while (!done)
{
;
}
Console.WriteLine("successfully connect " + l.sendSocket.RemoteEndPoint);
}
if (!l.linked)
{
throw new Exception("无法连接" + l.dst_username + "的IP地址。");
}
}
public void start()
{
if (working)
{
throw new Exception("您已经登录了。");
}
string ip;
sl.query4IP(sl.getUserName(), out ip);
IPAddress ipAddress = IPAddress.Parse(ip);
IPEndPoint localEndPoint = new IPEndPoint(ipAddress, common.p2p_port);
try
{
listenSocket.Bind(localEndPoint);
listenSocket.Listen(backlog);
working = true;
using (BackgroundWorker bw = new BackgroundWorker())
{
bw.DoWork += (object o, DoWorkEventArgs ea) =>
{
allDone.Reset();
listenSocket.BeginAccept(
new AsyncCallback(this.acceptCallback),
listenSocket);
Console.WriteLine("Waiting for a connection...");
allDone.WaitOne();
};
bw.RunWorkerCompleted += (object o, RunWorkerCompletedEventArgs ea) =>
{
if (ea.Error == null && working)
{
bw.RunWorkerAsync();
}
};
bw.RunWorkerAsync();
}
}
catch (System.Exception ex)
{
working = false;
if (listenSocket.Connected)
{
listenSocket.Close();
}
throw ex;
}
}
