org.pcap4j.sample.GetNextPacketEx Maven / Gradle / Ivy
package org.pcap4j.sample;
import java.io.EOFException;
import java.io.IOException;
import java.util.concurrent.TimeoutException;
import org.pcap4j.core.BpfProgram.BpfCompileMode;
import org.pcap4j.core.NotOpenException;
import org.pcap4j.core.PcapHandle;
import org.pcap4j.core.PcapNativeException;
import org.pcap4j.core.PcapNetworkInterface;
import org.pcap4j.core.PcapNetworkInterface.PromiscuousMode;
import org.pcap4j.packet.Packet;
import org.pcap4j.util.NifSelector;
@SuppressWarnings("javadoc")
public class GetNextPacketEx {
private static final String COUNT_KEY
= GetNextPacketEx.class.getName() + ".count";
private static final int COUNT
= Integer.getInteger(COUNT_KEY, 5);
private static final String READ_TIMEOUT_KEY
= GetNextPacketEx.class.getName() + ".readTimeout";
private static final int READ_TIMEOUT
= Integer.getInteger(READ_TIMEOUT_KEY, 10); // [ms]
private static final String SNAPLEN_KEY
= GetNextPacketEx.class.getName() + ".snaplen";
private static final int SNAPLEN
= Integer.getInteger(SNAPLEN_KEY, 65536); // [bytes]
public static void main(String[] args) throws PcapNativeException, NotOpenException {
String filter = args.length != 0 ? args[0] : "";
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);
handle.setFilter(
filter,
BpfCompileMode.OPTIMIZE
);
int num = 0;
while (true) {
try {
Packet packet = handle.getNextPacketEx();
System.out.println(handle.getTimestamp());
System.out.println(packet);
num++;
if (num >= COUNT) {
break;
}
} catch (TimeoutException e) {
} catch (EOFException e) {
e.printStackTrace();
}
}
handle.close();
}
}