@Test
public void testRead() throws Exception {
String pcapFile =
new StringBuilder()
.append(resourceDirPath)
.append("/")
.append(getClass().getSimpleName())
.append(".pcap")
.toString();
PcapHandle ph = Pcaps.openOffline(pcapFile);
StringBuilder sb = new StringBuilder(1000);
sb.append(ph.getNextPacket().toString())
.append(System.getProperty("line.separator"))
.append(ph.getNextPacket().toString());
ph.close();
FileReader fr =
new FileReader(
new StringBuilder()
.append(resourceDirPath)
.append("/")
.append(getClass().getSimpleName())
.append(".log")
.toString());
BufferedReader fbr = new BufferedReader(fr);
StringReader sr = new StringReader(sb.toString());
BufferedReader sbr = new BufferedReader(sr);
String line;
while ((line = fbr.readLine()) != null) {
assertEquals(line, sbr.readLine());
}
assertNull(sbr.readLine());
fbr.close();
fr.close();
sr.close();
sbr.close();
}
public static void main(String[] args)
throws PcapNativeException, NotOpenException, InterruptedException {
final PcapHandle pcapHandleReadOffline = Pcaps.openOffline(PCAP_FILE_READ);
pcapDumper = pcapHandleReadOffline.dumpOpen(PCAP_FILE_WRITE);
PacketListener packetListener =
new PacketListener() {
IPv4AddressRandomizer ipV4randomizer = new IPv4AddressRandomizer();
IPv6AddressRandomizer ipV6randomizer = new IPv6AddressRandomizer();
public void gotPacket(Packet fullPacket) {
long timestampInts = pcapHandleReadOffline.getTimestampInts();
int timestampMicros = pcapHandleReadOffline.getTimestampMicros();
UdpPacket udpPacket = fullPacket.get(UdpPacket.class);
fullPacket.getHeader();
if (udpPacket == null) return;
if (udpPacket.getHeader().getDstPort().value() != 2055)
return; // discard all packets which are not IPFIX
byte[] rawUpdPacketBytes = udpPacket.getRawData();
byte[] onlyIPFIXbytes = new byte[rawUpdPacketBytes.length - 8];
System.arraycopy(rawUpdPacketBytes, 8, onlyIPFIXbytes, 0, rawUpdPacketBytes.length - 8);
try {
MessageHeader messageHeader = MessageHeader.parse(onlyIPFIXbytes);
List<SetHeader> setHeaders = messageHeader.getSetHeaders();
for (SetHeader currentSetHeader : setHeaders) {
List<DataRecord> dataRecords = currentSetHeader.getDataRecords();
for (DataRecord currentDataRecord : dataRecords) {
try {
boolean foundIPv6 = false;
boolean foundIPv4 = false;
if (currentDataRecord instanceof L2IPDataRecord) {
L2IPDataRecord l2IPDataRecord = (L2IPDataRecord) currentDataRecord;
if (Utility.isConfigured(l2IPDataRecord.getDestinationIPv6Address())) {
foundIPv6 = true;
}
if (Utility.isConfigured(l2IPDataRecord.getSourceIPv6Address())) {
foundIPv6 = true;
}
if (Utility.isConfigured(l2IPDataRecord.getDestinationIPv4Address())) {
foundIPv4 = true;
}
if (Utility.isConfigured(l2IPDataRecord.getSourceIPv4Address())) {
foundIPv4 = true;
}
Inet4Address realDestinationIpv4 = l2IPDataRecord.getDestinationIPv4Address();
Inet4Address realSourceIpv4 = l2IPDataRecord.getSourceIPv4Address();
Inet6Address realDestinationIpv6 = l2IPDataRecord.getDestinationIPv6Address();
Inet6Address realSourceIpv6 = l2IPDataRecord.getSourceIPv6Address();
Inet4Address fakeDestinationIpv4 = realDestinationIpv4;
Inet4Address fakeSourceIpv4 = realSourceIpv4;
Inet6Address fakeDestinationIpv6 = realDestinationIpv6;
Inet6Address fakeSourceIpv6 = realSourceIpv6;
if (foundIPv4) {
fakeDestinationIpv4 =
(Inet4Address) ipV4randomizer.randomize(realDestinationIpv4);
fakeSourceIpv4 = (Inet4Address) ipV4randomizer.randomize(realSourceIpv4);
l2IPDataRecord.setDestinationIPv4Address(fakeDestinationIpv4);
l2IPDataRecord.setSourceIPv4Address(fakeSourceIpv4);
}
if (foundIPv6) {
fakeSourceIpv6 = (Inet6Address) ipV6randomizer.randomize(realSourceIpv6);
fakeDestinationIpv6 =
(Inet6Address) ipV6randomizer.randomize(realDestinationIpv6);
l2IPDataRecord.setDestinationIPv6Address(fakeDestinationIpv6);
l2IPDataRecord.setSourceIPv6Address(fakeSourceIpv6);
}
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Packet.Builder packetBuilderUDP = fullPacket.get(UdpPacket.class).getBuilder();
UnknownPacket.Builder unknownPacketBuilder = new UnknownPacket.Builder();
unknownPacketBuilder.rawData(messageHeader.getBytes());
packetBuilderUDP.payloadBuilder(unknownPacketBuilder);
Packet.Builder packetBuilderIPv4 = fullPacket.get(IpV4Packet.class).getBuilder();
packetBuilderIPv4.payloadBuilder(packetBuilderUDP);
Packet.Builder packetBuilderEthernet =
fullPacket.get(EthernetPacket.class).getBuilder();
packetBuilderEthernet.payloadBuilder(packetBuilderIPv4);
Packet newPacket = packetBuilderEthernet.build();
pcapDumper.dump(newPacket, timestampInts, timestampMicros);
if (onlyIPFIXbytes.length != messageHeader.getBytes().length) {
System.out.println(
"Lenght: OnlyIPFIX: "
+ onlyIPFIXbytes.length
+ " : Generated: "
+ messageHeader.getBytes().length);
}
} catch (HeaderParseException e) {
e.printStackTrace();
} catch (HeaderBytesException e) {
e.printStackTrace();
} catch (NotOpenException e) {
e.printStackTrace();
}
}
};
pcapHandleReadOffline.loop(-1, packetListener);
pcapHandleReadOffline.close();
pcapDumper.close();
}