74 lines
2.3 KiB
Java
74 lines
2.3 KiB
Java
/*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Ziver Koc
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* 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, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package zutil.net;
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import java.io.IOException;
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import java.net.DatagramPacket;
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import java.net.DatagramSocket;
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import java.net.InetAddress;
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import java.net.MulticastSocket;
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/**
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* This class is the client for ServerFind that receives the server IP
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*
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* @author Ziver
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*
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*/
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public class ServerFindClient{
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public String broadcastAddress = "230.0.0.1";
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private int port;
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/**
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* Creates a ServerFind Client
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*
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* @param port The port to contact the server on
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*/
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public ServerFindClient(int port){
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this.port = port;
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}
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/**
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* Requests IP from server
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*
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* @return The address of the server
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* @throws IOException
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*/
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public InetAddress find() throws IOException{
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InetAddress group = InetAddress.getByName(broadcastAddress);
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DatagramSocket lan_socket = new DatagramSocket();
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MulticastSocket Msocket = new MulticastSocket(port);
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Msocket.joinGroup(group);
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byte[] buf = new byte[256];
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DatagramPacket packet = new DatagramPacket(buf, buf.length, group, port);
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lan_socket.send(packet);
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packet = new DatagramPacket(buf, buf.length);
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Msocket.receive(packet);
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return packet.getAddress();
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}
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}
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