static public void configureNetwork(string externalIp, int port)
{
// Network configuration
UPnP upnp = new UPnP();
IxianHandler.publicPort = port;
if (externalIp != "" && IPAddress.TryParse(externalIp, out _))
{
IxianHandler.publicIP = externalIp;
}
else
{
IxianHandler.publicIP = "";
List <IPAndMask> local_ips = CoreNetworkUtils.GetAllLocalIPAddressesAndMasks();
foreach (IPAndMask local_ip in local_ips)
{
if (IPv4Subnet.IsPublicIP(local_ip.Address))
{
Logging.info(String.Format("Public IP detected: {0}, mask {1}.", local_ip.Address.ToString(), local_ip.SubnetMask.ToString()));
IxianHandler.publicIP = local_ip.Address.ToString();
}
}
if (IxianHandler.publicIP == "")
{
IPAddress primary_local = CoreNetworkUtils.GetPrimaryIPAddress();
if (primary_local == null)
{
Logging.warn("Unable to determine primary IP address.");
}
else
{
Logging.warn(String.Format("None of the locally configured IP addresses are public. Attempting UPnP..."));
Task <IPAddress> public_ip = upnp.GetExternalIPAddress();
if (public_ip.Wait(1000))
{
if (public_ip.Result != null)
{
Logging.info(String.Format("UPNP-determined public IP: {0}. Attempting to configure a port-forwarding rule.", public_ip.Result.ToString()));
if (upnp.MapPublicPort(port, primary_local))
{
IxianHandler.publicIP = public_ip.Result.ToString(); //upnp.getMappedIP();
Logging.info(string.Format("Network configured. Public IP is: {0}", IxianHandler.publicIP));
}
else
{
Logging.warn("UPnP configuration failed, please set port forwarding for port {0} manually.", port);
}
}
else
{
Logging.warn("UPnP configuration failed, please set port forwarding for port {0} manually.", port);
}
}
}
}
}
}
/// <summary>
/// Returns the first IPv4, unicast address on the local computer which has a gateway configured and is, therefore,
/// probably Internet-connectable.
/// </summary>
/// <returns>IP address object</returns>
public static IPAddress GetPrimaryIPAddress()
{
// This is impossible to find, but we return the first IP which has a gateway configured
List <IPAndMask> ips = new List <IPAndMask>();
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
foreach (NetworkInterface nic in nics)
{
if (nic.OperationalStatus == OperationalStatus.Up && nic.Supports(NetworkInterfaceComponent.IPv4))
{
IPInterfaceProperties properties = nic.GetIPProperties();
if (properties.GatewayAddresses.Count == 0)
{
continue;
}
UnicastIPAddressInformationCollection unicast = properties.UnicastAddresses;
foreach (UnicastIPAddressInformation unicastIP in unicast)
{
if (unicastIP.Address.AddressFamily == AddressFamily.InterNetwork)
{
IPv4Subnet subnet = IPv4Subnet.FromSubnet(unicastIP.Address, unicastIP.IPv4Mask);
foreach (GatewayIPAddressInformation gw_addr in properties.GatewayAddresses)
{
if (gw_addr.Address.AddressFamily == AddressFamily.InterNetwork)
{
if (subnet.IsIPInSubnet(gw_addr.Address))
{
return(unicastIP.Address);
}
}
}
}
}
}
}
return(null);
}