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// --------------------------------------------------------------------------------------------------------------------
// <copyright file="PortService.cs" company="HandBrake Project (http://handbrake.fr)">
// This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
// Defines the PortService type.
// </summary>
// --------------------------------------------------------------------------------------------------------------------
namespace HandBrakeWPF.Services
{
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.NetworkInformation;
using HandBrakeWPF.Services.Interfaces;
public class PortService : IPortService
{
private readonly object lockObject = new object();
private List<int> usedPorts = new List<int>();
public PortService()
{
}
public void FreePort(int port)
{
lock (this.lockObject)
{
this.usedPorts.Remove(port);
}
}
public int GetOpenPort(int startPort)
{
lock (this.lockObject)
{
int foundPort = FindUnusedPort(startPort);
// If we find a port that's free on the system, but we've already allocated, try find another.
while (this.usedPorts.Contains(foundPort))
{
int nextPort = foundPort + 1;
foundPort = FindUnusedPort(nextPort);
}
// Record we've used this port.
this.usedPorts.Add(foundPort);
return foundPort;
}
}
private int FindUnusedPort(int startPort)
{
if (startPort == 0)
{
startPort = 8037;
}
int portStartIndex = startPort;
IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
IPEndPoint[] tcpEndPoints = properties.GetActiveTcpListeners();
List<int> usedPorts = tcpEndPoints.Select(p => p.Port).ToList<int>();
int unusedPort = 0;
unusedPort = Enumerable.Range(portStartIndex, 99).FirstOrDefault(p => !usedPorts.Contains(p));
return unusedPort;
}
}
}
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