수면제가 필요해요...

import org.jnetpcap.packet.format.FormatUtils;

public class Ip4Header {

public final static int TCP = 6;

public final static int UDP = 17;

String version;

int     headerLength;

String srcIP;

String dstIP;

int protocol;

public String getVersion() {

return version;

}

public int getHeaderLength() {

return headerLength;

}

public String getSrcIP() {

return srcIP;

}

public String getDstIP() {

return dstIP;

}

public int getProtocol() {

return protocol;

}

public boolean makeHeader(byte[] buf) {

try {

byte[] bTmp = new byte[1];

System.arraycopy(buf, 14, bTmp, 0, bTmp.length);

if(!"4".equals(StringUtil.ascii2hexstr(bTmp).substring(0, 1))) return false;

this.version = StringUtil.ascii2hexstr(bTmp).substring(0, 1);

this.headerLength = Integer.parseInt(StringUtil.ascii2hexstr(bTmp).substring(1, 2)) * 4;

byte[] protocol = new byte[1];

byte[] dstIP = new byte[4];

byte[] srcIP = new byte[4];

System.arraycopy(buf, 23, protocol, 0, protocol.length);

System.arraycopy(buf, 26, srcIP, 0, srcIP.length);

System.arraycopy(buf, 30, dstIP, 0, dstIP.length);

this.protocol = protocol[0];

this.srcIP = FormatUtils.ip(srcIP);

this.dstIP = FormatUtils.ip(dstIP);

return true;

} catch(Exception e) {

e.printStackTrace();

return false;

}

}

}

public class EthernetHeader {

public final static String IP = "0800";

byte[] srcMac = new byte[6];

byte[] dstMac = new byte[6];

byte[] type = new byte[2];

public byte[] getDstMac() {

return dstMac;

}

public byte[] getSrcMac() {

return srcMac;

}

public byte[] getType() {

return type;

}

public boolean makeHeader(byte[] buf) {

try {

System.arraycopy(buf, 0, dstMac, 0, dstMac.length);

System.arraycopy(buf, 6, srcMac, 0, srcMac.length);

System.arraycopy(buf, 12, type, 0, type.length);

return true;

} catch(Exception e) {

return false;

}

}

public boolean isIp() {

return IP.equals(StringUtil.ascii2hexstr(type));

}

}

@Override

public void nextPacket(PcapHeader header, ByteBuffer buffer, Object arg2) {

try {

PcapDumper dumper = (PcapDumper) arg2;

    byte[] dst = new byte[buffer.capacity()];

    buffer.get(dst);

    EthernetHeader ethernetHeader = new EthernetHeader();

    if(!ethernetHeader.makeHeader(dst)) return;

    if(ethernetHeader.isIp()) { // IP 프로토콜

// packet 내의 시간 값 읽어 온다.

String timestampString = JNetPcapUtil.makeTimestampString("yyyyMMddHHmmssSSS", new Date(header.timestampInMillis()));
................
..........