Java UnknownPacket.Builder方法代码示例

import org.pcap4j.packet.UnknownPacket; //导入方法依赖的package包/类
/**
 * Build packet
 *
 * @throws java.net.UnknownHostException
 */
public void buildPacket() throws UnknownHostException {

    int calculatedLength = getPacketLength();
    String payloadString = payload.getPayloadType().getPadPayloadString(payload.getPayloadPattern(), calculatedLength * 2);

    udpBuilder = new UdpPacket.Builder();
    UnknownPacket.Builder unknownb = new UnknownPacket.Builder();
    unknownb.rawData(payload.getPayloadPad(payloadString, calculatedLength));
    Inet4Address srcAddr = (Inet4Address) InetAddress.getByAddress(
            new byte[]{(byte) 0, (byte) 0, (byte) 0, (byte) 0}
    );
    Inet4Address dstAddr = (Inet4Address) InetAddress.getByAddress(
            new byte[]{(byte) 0, (byte) 0, (byte) 0, (byte) 0}
    );

    udpBuilder.srcPort(UdpPort.getInstance((short) srcPort.value()))
            .dstPort(UdpPort.getInstance((short) dstPort.value()))
            .srcAddr(srcAddr)
            .dstAddr(dstAddr)
            .length((short) calculatedLength)
            .payloadBuilder(unknownb)
            .correctChecksumAtBuild(true)
            .correctLengthAtBuild(false);

    this.packet = udpBuilder.build();
}
 

import org.pcap4j.packet.UnknownPacket; //导入方法依赖的package包/类
public static Packet buildIpV4(
		MacAddress srcAddress_mac,
		MacAddress dstAddrress_mac,
		IpV4Packet.Builder builder_ipv4){

	org.pcap4j.packet.Packet.Builder builder=null;
	EtherType etherType=null;
	Packet p=null;
	if(ppp){
		etherType=EtherType.PPPOE_SESSION_STAGE;
		
		UnknownPacket.Builder pppBuilder=new UnknownPacket.Builder();
		byte[] ipData=builder_ipv4.build().getRawData();
		
		byte[] lenb=new byte[2];
		ByteShortConvert.toByteArray((short) (ipData.length+2), lenb, 0);
		
		byte[] pppHead=new byte[8];
		System.arraycopy(pppHead_static, 0, pppHead, 0, pppHead.length);
		System.arraycopy(lenb, 0, pppHead, 4, 2);
		
		byte[] newData=new byte[pppHead.length+ipData.length];
		System.arraycopy(pppHead, 0, newData, 0, pppHead.length);
		System.arraycopy(ipData, 0, newData, 8, ipData.length);
		pppBuilder.rawData(newData);
		
		builder=pppBuilder;
	}else {
		etherType=EtherType.IPV4;
		builder=builder_ipv4;
	}
	
	EthernetPacket.Builder etherBuilder = new EthernetPacket.Builder();
	etherBuilder.dstAddr(dstAddrress_mac)
	.srcAddr(srcAddress_mac)
	.type(etherType)
	.payloadBuilder(builder)
	.paddingAtBuild(true);
	
	p = etherBuilder.build();
	
	return p;
}
 

import org.pcap4j.packet.UnknownPacket; //导入方法依赖的package包/类
/**
 * Build packet
 */
public void buildPacket() {

    int calculatedLength = getPacketLength() - 14;

    String payloadString = payload.getPayloadType().getPadPayloadString(payload.getPayloadPattern(), calculatedLength * 2);

    UnknownPacket.Builder unknownb = null;
    if (calculatedLength != 0) {
        unknownb = new UnknownPacket.Builder();
        unknownb.rawData(payload.getPayloadPad(payloadString, calculatedLength));
    }
    ArrayList<TcpOption> options = new ArrayList<TcpOption>();

    options.add(TcpEndOfOptionList.getInstance());

    tcpBuilder = new TcpPacket.Builder();
    tcpBuilder.dstPort(dstPort)
            .srcPort(srcPort)
            .sequenceNumber(sequenceNumber)
            .acknowledgmentNumber(acknowledgmentNumber)
            .dataOffset(dataOffset)
            .reserved(reserved)
            .urg(urg)
            .ack(ack)
            .psh(psh)
            .rst(rst)
            .syn(syn)
            .fin(fin)
            .window(window)
            .checksum(checksum)
            .urgentPointer(urgentPointer)
            .options(options)
            .padding(new byte[]{(byte) 0xaa})
            .correctChecksumAtBuild(false)
            .correctLengthAtBuild(false)
            .paddingAtBuild(false);

    if (calculatedLength != 0) {
        tcpBuilder.payloadBuilder(unknownb);
    }
    this.packet = tcpBuilder.build();
}
 

import org.pcap4j.packet.UnknownPacket; //导入方法依赖的package包/类
@Override
public void gotPacket(Packet rawPacket) {
    try {
        LOG.info("Read raw " + rawPacket);
        IpV4Packet ipPacket = rawPacket.get(IpV4Packet.class);
        UdpPacket udpPacket = rawPacket.get(UdpPacket.class);
        byte[] dhcpData = udpPacket.getPayload().getRawData();
        InetSocketAddress remoteAddress = new InetSocketAddress(ipPacket.getHeader().getSrcAddr(), udpPacket.getHeader().getSrcPort().valueAsInt());
        InetSocketAddress localAddress = new InetSocketAddress(ipPacket.getHeader().getDstAddr(), udpPacket.getHeader().getDstPort().valueAsInt());
        DhcpRequestContext context = new DhcpRequestContext(interfaceAddresses, remoteAddress, localAddress);
        DhcpMessage request = decoder.decode(ByteBuffer.wrap(dhcpData));
        LOG.info("Read DHCP " + request);
        DhcpMessage reply = service.getReplyFor(context, request);
        if (reply == null)
            return;
        byte[] replyData = new byte[1536];
        ByteBuffer buffer = ByteBuffer.wrap(replyData);
        encoder.encode(buffer, reply);
        replyData = Arrays.copyOf(replyData, buffer.position());    // Truncate array to writer position.
        UnknownPacket.Builder dhcpBuilder = new UnknownPacket.Builder()
                .rawData(replyData);
        UdpPacket.Builder udpBuilder = new UdpPacket.Builder()
                .payloadBuilder(dhcpBuilder)
                .srcPort(udpPacket.getHeader().getDstPort())
                .dstPort(udpPacket.getHeader().getSrcPort())
                .correctChecksumAtBuild(true)
                .correctLengthAtBuild(true);
        IpV4Packet.Builder ipBuilder = new IpV4Packet.Builder()
                .payloadBuilder(udpBuilder)
                .srcAddr(null) // TODO
                .dstAddr(null) // TODO
                .protocol(IpNumber.UDP)
                .correctChecksumAtBuild(true)
                .correctLengthAtBuild(true)
                .paddingAtBuild(true);
        EthernetPacket.Builder ethernetBuilder = new EthernetPacket.Builder()
                .payloadBuilder(ipBuilder)
                .type(EtherType.IPV4)
                .paddingAtBuild(true);
        Packet replyPacket = ethernetBuilder.build();
        // handle.sendPacket(replyPacket);
    } catch (Exception e) {
        LOG.error("DHCP failed", e);
    }
}
 

import org.pcap4j.packet.UnknownPacket; //导入方法依赖的package包/类
public void sendSnmpMessage(
  InetAddress dstAddr, int dstPort,
  byte[] message
) throws SendPacketException {
  InetAddress srcAddr;
  int srcPort;
  NetworkInterface sender;

  SnmpContext context = agent.getContextfulWorkerPool().unregisterContext();
  if (context != null) {
    // response
    sender = context.getGetter();
    IpV4Packet ipV4Packet = context.getRequestPacket().get(IpV4Packet.class);
    if (ipV4Packet != null) {
      srcAddr = context.getRequestPacket().get(IpV4Packet.class).getHeader()
                  .getDstAddr();
    }
    else {
      srcAddr = context.getRequestPacket().get(IpV6Packet.class).getHeader()
                  .getDstAddr();
    }
    srcPort = context.getRequestPacket().get(UdpPacket.class).getHeader()
                .getDstPort().value() & 0xFFFF;
  }
  else {
    // trap
    if (dstAddr instanceof Inet4Address) {
      sender = getNifByDstIpAddr((Inet4Address)dstAddr);
    }
    else {
      sender = getNifByDstIpAddr((Inet6Address)dstAddr);
    }
    srcAddr = agent.getInetAddress();
    srcPort = TRAP_SRC_PORT;
  }
  UnknownPacket.Builder unknownb = new UnknownPacket.Builder();
  unknownb.rawData(message);

  UdpPacket udpp
    = UdpHelper.pack(
        unknownb.build(),
        UdpPort.getInstance((short)srcPort),
        UdpPort.getInstance((short)dstPort),
        srcAddr,
        dstAddr
      );

  sendL4Packet(udpp, srcAddr, dstAddr, sender);
}