port_forwarder 1.0.0

Manage router ports using UPnP(Universal Plug and Play), NAT-PCP(Port Control Protocol) or NAT-PMP(Port Mapping Protocol)

example/port_forwarder_example.dart

import 'package:port_forwarder/port_forwarder.dart';

const PortType _portType = PortType.tcp;
const int _portNumber = 8080;

void main() async {
  final gateway = await Gateway.discover(protocols: {GatewayType.upnp});
  if(gateway == null) {
    print("No gateway found!");
    return;
  }

  print("Internal gateway address: ${gateway.internalAddress}");
  print("External gateway address: ${await gateway.externalAddress}");

  try {
    print("Opening port $_portNumber($_portType)...");
    await gateway.openPort(protocol: _portType, externalPort: _portNumber);
    print("Opened port!");
  } on GatewayError catch(error) {
    print("Cannot open port: $error");
    return;
  }

  try {
    final mapped = await gateway.isMapped(protocol: _portType, externalPort: _portNumber);
    if(!mapped) {
      print("isMapped = false when port is supposed to be open");
    }
  } on GatewayError catch(error) {
    print("Cannot check if port is mapped: $error");
    return;
  }

  try {
    print("Closing port $_portNumber($_portType)...");
    await gateway.closePort(protocol: _portType, externalPort: _portNumber);
    print("Closed port!");
  } on GatewayError catch(error) {
    print("Cannot close port: $error");
    return;
  }

  try {
    final mapped = await gateway.isMapped(protocol: _portType, externalPort: _portNumber);
    if(mapped) {
      print("isMapped = true when port is not supposed to be open");
    }
  } on GatewayError catch(error) {
    print("Cannot check if port is mapped: $error");
    return;
  }
}