package org.pcap4j.sample;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.pcap4j.core.BpfProgram.BpfCompileMode;
import org.pcap4j.core.NotOpenException;
import org.pcap4j.core.PacketListener;
import org.pcap4j.core.PcapHandle;
import org.pcap4j.core.PcapNativeException;
import org.pcap4j.core.PcapNetworkInterface;
import org.pcap4j.core.PcapNetworkInterface.PromiscuousMode;
import org.pcap4j.core.Pcaps;
import org.pcap4j.packet.ArpPacket;
import org.pcap4j.packet.EthernetPacket;
import org.pcap4j.packet.Packet;
import org.pcap4j.packet.namednumber.ArpHardwareType;
import org.pcap4j.packet.namednumber.ArpOperation;
import org.pcap4j.packet.namednumber.EtherType;
import org.pcap4j.util.ByteArrays;
import org.pcap4j.util.MacAddress;
import org.pcap4j.util.NifSelector;
@SuppressWarnings("javadoc")
public class SendArpRequest {
private static final String COUNT_KEY
= SendArpRequest.class.getName() + ".count";
private static final int COUNT
= Integer.getInteger(COUNT_KEY, 1);
private static final String READ_TIMEOUT_KEY
= SendArpRequest.class.getName() + ".readTimeout";
private static final int READ_TIMEOUT
= Integer.getInteger(READ_TIMEOUT_KEY, 10); // [ms]
private static final String SNAPLEN_KEY
= SendArpRequest.class.getName() + ".snaplen";
private static final int SNAPLEN
= Integer.getInteger(SNAPLEN_KEY, 65536); // [bytes]
private static final MacAddress SRC_MAC_ADDR
= MacAddress.getByName("fe:00:01:02:03:04");
private static MacAddress resolvedAddr;
/**
*
* @param args
* @throws PcapNativeException
* @throws NotOpenException
*/
public static void main(String[] args) throws PcapNativeException, NotOpenException {
String strSrcIpAddress = "192.0.2.100"; // for InetAddress.getByName()
String strDstIpAddress = args[0]; // for InetAddress.getByName()
System.out.println(COUNT_KEY + ": " + COUNT);
System.out.println(READ_TIMEOUT_KEY + ": " + READ_TIMEOUT);
System.out.println(SNAPLEN_KEY + ": " + SNAPLEN);
System.out.println("\n");
PcapNetworkInterface nif;
try {
nif = new NifSelector().selectNetworkInterface();
} catch (IOException e) {
e.printStackTrace();
return;
}
if (nif == null) {
return;
}
System.out.println(nif.getName() + "(" + nif.getDescription() + ")");
PcapHandle handle
= nif.openLive(SNAPLEN, PromiscuousMode.PROMISCUOUS, READ_TIMEOUT);
PcapHandle sendHandle
= nif.openLive(SNAPLEN, PromiscuousMode.PROMISCUOUS, READ_TIMEOUT);
ExecutorService pool = Executors.newSingleThreadExecutor();
try {
handle.setFilter(
"arp and src host " + strDstIpAddress
+ " and dst host " + strSrcIpAddress
+ " and ether dst " + Pcaps.toBpfString(SRC_MAC_ADDR),
BpfCompileMode.OPTIMIZE
);
PacketListener listener
= new PacketListener() {
public void gotPacket(Packet packet) {
if (packet.contains(ArpPacket.class)) {
ArpPacket arp = packet.get(ArpPacket.class);
if (arp.getHeader().getOperation().equals(ArpOperation.REPLY)) {
SendArpRequest.resolvedAddr = arp.getHeader().getSrcHardwareAddr();
}
}
System.out.println(packet);
}
};
Task t = new Task(handle, listener);
pool.execute(t);
ArpPacket.Builder arpBuilder = new ArpPacket.Builder();
try {
arpBuilder
.hardwareType(ArpHardwareType.ETHERNET)
.protocolType(EtherType.IPV4)
.hardwareLength((byte)MacAddress.SIZE_IN_BYTES)
.protocolLength((byte)ByteArrays.INET4_ADDRESS_SIZE_IN_BYTES)
.operation(ArpOperation.REQUEST)
.srcHardwareAddr(SRC_MAC_ADDR)
.srcProtocolAddr(InetAddress.getByName(strSrcIpAddress))
.dstHardwareAddr(MacAddress.ETHER_BROADCAST_ADDRESS)
.dstProtocolAddr(InetAddress.getByName(strDstIpAddress));
} catch (UnknownHostException e) {
throw new IllegalArgumentException(e);
}
EthernetPacket.Builder etherBuilder = new EthernetPacket.Builder();
etherBuilder.dstAddr(MacAddress.ETHER_BROADCAST_ADDRESS)
.srcAddr(SRC_MAC_ADDR)
.type(EtherType.ARP)
.payloadBuilder(arpBuilder)
.paddingAtBuild(true);
for (int i = 0; i < COUNT; i++) {
Packet p = etherBuilder.build();
System.out.println(p);
sendHandle.sendPacket(p);
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
break;
}
}
} finally {
if (handle != null && handle.isOpen()) {
handle.close();
}
if (sendHandle != null && sendHandle.isOpen()) {
sendHandle.close();
}
if (pool != null && !pool.isShutdown()) {
pool.shutdown();
}
System.out.println(strDstIpAddress + " was resolved to " + resolvedAddr);
}
}
private static class Task implements Runnable {
private PcapHandle handle;
private PacketListener listener;
public Task(PcapHandle handle, PacketListener listener) {
this.handle = handle;
this.listener = listener;
}
public void run() {
try {
handle.loop(COUNT, listener);
} catch (PcapNativeException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} catch (NotOpenException e) {
e.printStackTrace();
}
}
}
}