| // 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); |
| } |
| } |
| } |