Mercurial > hg > Members > kono > WifiBroadcast

annotate src/main/java/jp/ac/uryukyu/ie/kono/wifibroadcast/WifiBroadcast.java @ 27:12633f67f3cf default tip

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jar
author oshiro
date Wed, 28 Nov 2018 18:28:39 +0900
parents src/main/jp/ac/uryukyu/ie/kono/wifibroadcast/WifiBroadcast.java@42ecbd9364fa
children
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27
oshiro
parents: 26
diff changeset
1 package jp.ac.uryukyu.ie.kono.wifibroadcast;
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df9d16620c08 Wifi broad cast test program
Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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2
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3 import java.net.NetworkInterface;
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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4 import java.io.IOException;
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404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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5 import java.net.DatagramPacket;
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6 import java.net.DatagramSocket;
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7 import java.net.InetAddress;
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8 import java.net.InterfaceAddress;
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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9 import java.net.SocketException;
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10 import java.net.UnknownHostException;
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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11 import java.nio.ByteBuffer;
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12 import java.util.Enumeration;
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13
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14 public class WifiBroadcast implements WifiReceiver {
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15
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16 private DatagramSocket s;
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404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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17 private int port;
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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18 private InetAddress mAddr;
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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19
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95d58cc5bb0b instance for test, multiple senders
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20 public WifiBroadcast(int id,int port, SocketType sender) throws IOException {
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404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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21 this.port = port;
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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22
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23 if (sender == SocketType.Sender) {
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24 try {
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25 InetAddress address0 = getBroadcast();
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26 System.out.println("Found broadcast "+address0);
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404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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27 mAddr = address0;
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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28 s = new DatagramSocket();
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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29 // s.bind(new InetSocketAddress(address0,port+1+id));
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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30 // s.setBroadcast(true);
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31 } catch (SocketException e) {
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32 }
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33 } else {
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34 // InetAddress address0 = getBroadcast();
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35 s = new DatagramSocket(port);
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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36 // s.bind(new InetSocketAddress(address0,port));
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37 s.setReuseAddress(true);
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38 s.setBroadcast(true);
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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39 }
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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40 }
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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42 public void recieve(ByteBuffer testData, long timeout) throws IOException {
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43 DatagramPacket packet = new DatagramPacket(testData.array(),testData.capacity());
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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44 s.receive(packet);
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45 testData.limit(packet.getLength());
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46 testData.position(0);
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47 System.out.println("recv "+packet.getLength()+" bytes from "+packet.getAddress());
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48 return; // one at a time
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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49 }
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50
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51
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52 public void send(ByteBuffer testData) throws IOException {
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53 if(testData.limit() < 1500) {
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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54 DatagramPacket sendPacket = new DatagramPacket(testData.array(), testData.limit(),mAddr, port);
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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55 s.send(sendPacket);
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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56 testData.position(testData.limit());
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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57 } else {
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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58 int temp = 1000;
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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59 for(int i = 0 ; i < testData.limit();) {
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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60 DatagramPacket sendPacket = new DatagramPacket(testData.array(),i, temp, mAddr, port);
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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61 s.send(sendPacket);
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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62 testData.position(i);
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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63 i += 1000;
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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64 if(testData.limit() - i > 1000) {
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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65 temp = 1000;
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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66 } else {
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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67 temp = testData.limit() - i;
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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68 }
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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69 }
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Taninari YU <you@cr.ie.u-ryukyu.ac.jp>
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70 }
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404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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71 System.out.println("send");
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Shinji KONO <kono@ie.u-ryukyu.ac.jp>
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72 }
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73
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74 public InetAddress getBroadcast0() throws UnknownHostException {
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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75 return InetAddress.getByName("192.168.100.66");
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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76 }
404778ac3f55 worked. Broadcast, Multicast, Multicast channel.
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77
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78 public static InetAddress getBroadcast() throws SocketException {
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79 Enumeration<NetworkInterface> interfaces =
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80 NetworkInterface.getNetworkInterfaces();
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81 while (interfaces.hasMoreElements()) {
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82 NetworkInterface networkInterface = interfaces.nextElement();
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83 if (networkInterface.isLoopback())
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84 continue; // Don't want to broadcast to the loopback interface
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85 for (InterfaceAddress interfaceAddress :
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86 networkInterface.getInterfaceAddresses()) {
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87 InetAddress broadcast = interfaceAddress.getBroadcast();
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88 if (broadcast == null)
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89 continue;
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90 // Use the address
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91 System.out.println("MTU="+networkInterface.getMTU());
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92 return broadcast;
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93 }
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94 }
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95 throw new SocketException();
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96 }
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98 @Override
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99 public void selectMode(boolean mode) {
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100 }
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101
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649b8573372c cleanup
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102
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103 }