jellyfin/Mono.Nat/Pmp/Mappers/PmpMapper.cs
2016-09-11 03:33:53 -04:00

84 lines
2.9 KiB
C#

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