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URL https://opencores.org/ocsvn/udp_ip_stack/udp_ip_stack/trunk

Subversion Repositories udp_ip_stack

[/] [udp_ip_stack/] [trunk/] [sw/] [UDPCxn.java] - Blame information for rev 4

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Line No. Rev Author Line
1 2 pjf
package com.pjf;
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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.SocketException;
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import java.net.UnknownHostException;
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public class UDPCxn {
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        private DatagramSocket skt;
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        private InetAddress dstIP;
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        public UDPCxn(long dstIPadr) throws SocketException, UnknownHostException {
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                skt = new DatagramSocket();
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                        byte[] target = new byte[4];
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                        target[0] = (byte) ((dstIPadr >> 24) & 0xff);
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                        target[1] = (byte) ((dstIPadr >> 16) & 0xff);
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                        target[2] = (byte) ((dstIPadr >> 8) & 0xff);
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                        target[3] = (byte) (dstIPadr & 0xff);
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                        dstIP = InetAddress.getByAddress(target);
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        }
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        public UDPCxn(String dstIPadr) throws SocketException, UnknownHostException {
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                skt = new DatagramSocket();
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                String[] parts = dstIPadr.split("[.]");
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                if (parts.length != 4) {
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                        throw new UnknownHostException("ip addr must have 4 parts");
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                }
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                        byte[] target = new byte[4];
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                        for (int i = 0; i<4; i++) {
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                                target[i] = (byte) Integer.parseInt(parts[i]);
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                        }
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                        dstIP = InetAddress.getByAddress(target);
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        }
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        public void send(byte[] data, int port) throws IOException {
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                DatagramPacket pkt = new DatagramPacket(data, data.length, dstIP, port);
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                System.out.println("Sending packet");
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                skt.send(pkt);
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        }
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        public void fixSend(String str, int port, boolean print) throws IOException {
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                String s1 = str.replace('~','\001');
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                byte[] data = s1.getBytes();
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                DatagramPacket pkt = new DatagramPacket(data, data.length, dstIP, port);
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                if (print) {
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                        System.out.println("Sending packet: " + str + " on port " + port);
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                }
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                skt.send(pkt);
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        }
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        public byte[] rcv() throws IOException {
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                byte[] buf = new byte[1024];
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                    DatagramPacket pkt = new DatagramPacket(buf, buf.length);
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//                  System.out.println("waiting to receive ...");
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                    skt.receive(pkt);
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                    int len = pkt.getLength();
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                    byte[] rd = pkt.getData();
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                byte[] data = new byte[len];
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                    for (int i=0; i<len; i++) {
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                        data[i] = rd[i];
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                    }
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                    return data;
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        }
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        public void close() {
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                    skt.close();
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        }
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        }

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