84 lines
2.9 KiB
C#
84 lines
2.9 KiB
C#
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//
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// Authors:
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// Nicholas Terry <nick.i.terry@gmail.com>
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//
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// Copyright (C) 2014 Nicholas Terry
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Net;
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using System.Net.Sockets;
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using System.Text;
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using Mono.Nat.Pmp;
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namespace Mono.Nat.Pmp.Mappers
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{
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internal class PmpMapper : Pmp, IMapper
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{
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public event EventHandler<DeviceEventArgs> DeviceFound;
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static PmpMapper()
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{
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CreateSocketsAndAddGateways();
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}
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public void Map(IPAddress gatewayAddress)
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{
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sockets.ForEach(x => Map(x, gatewayAddress));
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}
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void Map(UdpClient client, IPAddress gatewayAddress)
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{
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// The nat-pmp search message. Must be sent to GatewayIP:53531
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byte[] buffer = new byte[] { PmpConstants.Version, PmpConstants.OperationCode };
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client.Send(buffer, buffer.Length, new IPEndPoint(gatewayAddress, PmpConstants.ServerPort));
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}
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public void Handle(IPAddress localAddres, byte[] response)
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{
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//if (!IsSearchAddress(endpoint.Address))
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// return;
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if (response.Length != 12)
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return;
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if (response[0] != PmpConstants.Version)
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return;
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if (response[1] != PmpConstants.ServerNoop)
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return;
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int errorcode = IPAddress.NetworkToHostOrder(BitConverter.ToInt16(response, 2));
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if (errorcode != 0)
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NatUtility.Log("Non zero error: {0}", errorcode);
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IPAddress publicIp = new IPAddress(new byte[] { response[8], response[9], response[10], response[11] });
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OnDeviceFound(new DeviceEventArgs(new PmpNatDevice(localAddres, publicIp)));
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}
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private void OnDeviceFound(DeviceEventArgs args)
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{
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if (DeviceFound != null)
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DeviceFound(this, args);
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}
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}
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}
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