static UdtSocket PeerConnect(Socket socket, string remoteAddr, int remotePort)
{
bool bConnected = false;
int retry = 0;
UdtSocket client = null;
while (!bConnected)
{
try
{
DateTime now = InternetTime.Get();
int sleepTimeToSync = SleepTime(now);
Console.WriteLine("[{0}] - Waiting {1} sec to sync with other peer",
now.ToLongTimeString(),
sleepTimeToSync);
System.Threading.Thread.Sleep(sleepTimeToSync * 1000);
GetExternalEndPoint(socket);
if (client != null)
{
client.Close();
}
client = new UdtSocket(socket.AddressFamily, socket.SocketType);
client.Bind(socket);
Console.Write("\r{0} - Trying to connect to {1}:{2}. ",
retry++, remoteAddr, remotePort);
client.Connect(new IPEndPoint(IPAddress.Parse(remoteAddr), remotePort));
Console.WriteLine("Connected successfully to {0}:{1}",
remoteAddr, remotePort);
bConnected = true;
}
catch (Exception e)
{
Console.Write(e.Message.Replace(Environment.NewLine, ". "));
}
}
return(client);
}
static void Main(string[] args)
{
CommandLineArguments cla = CommandLineArguments.Parse(args);
if (cla == null || (!cla.Sender && !cla.Receiver))
{
CommandLineArguments.ShowUsage();
Environment.Exit(1);
return;
}
else if (cla.Sender && String.IsNullOrEmpty(cla.File))
{
CommandLineArguments.ShowUsage();
Environment.Exit(1);
return;
}
if (cla.File != null && (!(File.Exists(cla.File))))
{
Console.Error.WriteLine($"File {cla.File} does not exist");
Environment.Exit(2);
return;
}
string remoteIp;
int remotePort;
Socket socket = new Socket(
AddressFamily.InterNetwork,
SocketType.Dgram, ProtocolType.Udp);
try
{
if (cla.LocalPort != -1)
{
Console.WriteLine("Using local port: {0}", cla.LocalPort);
}
else
{
cla.LocalPort = 0;
}
socket.Bind(new IPEndPoint(IPAddress.Any, cla.LocalPort));
P2pEndPoint p2pEndPoint = GetExternalEndPoint(socket);
if (p2pEndPoint == null)
{
return;
}
Console.WriteLine("Tell this to your peer: {0}", p2pEndPoint.External.ToString());
Console.WriteLine();
Console.WriteLine();
Console.Write("Enter the ip:port of your peer: ");
string peer = Console.ReadLine();
if (string.IsNullOrEmpty(peer))
{
Console.WriteLine("Invalid ip:port entered");
return;
}
// try again to connect to external to "reopen" port
GetExternalEndPoint(socket);
ParseRemoteAddr(peer, out remoteIp, out remotePort);
UdtSocket connection = PeerConnect(socket, remoteIp, remotePort);
if (connection == null)
{
Console.Error.WriteLine("Failed to establish P2P conn to {0}", remoteIp);
Environment.Exit(3);
return;
}
try
{
if (cla.Sender)
{
Sender.Run(connection, cla.File, cla.Verbose);
return;
}
Receiver.Run(connection);
}
finally
{
connection.Close();
}
}
finally
{
socket.Close();
}
}