blob: 78b735c89f7cc53e95d417a5b16e5f53b61ee9e8 [file] [log] [blame]
// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
using System;
using System.Linq;
using System.Net;
using System.Net.Sockets;
namespace Org.Apache.REEF.Wake.Util
{
public static class NetworkUtils
{
private static IPAddress _localAddress;
private static readonly Random Random = new Random();
/// <summary>
/// Returns the first usable IP Address for the machine.
/// </summary>
/// <returns>The machine's local IP Address</returns>
public static IPAddress LocalIPAddress
{
get
{
if (_localAddress == null)
{
IPAddress[] localIps = Dns.GetHostAddresses(Dns.GetHostName());
_localAddress = localIps.Where(i => i.AddressFamily.Equals(AddressFamily.InterNetwork))
.OrderBy(ip => ip.ToString())
.First();
}
return _localAddress;
}
}
/// <summary>
/// Generate a random port between low (inclusive) and high (exclusive)
/// </summary>
/// <param name="low">The inclusive lower bound of the of the port range</param>
/// <param name="high">The exclusive upper bound of the port range</param>
/// <returns>The randomly generated port</returns>
public static int GenerateRandomPort(int low, int high)
{
return Random.Next(low, high);
}
}
}