package edu.uci.iotproject;
+
+import org.pcap4j.core.*;
+import org.pcap4j.packet.*;
+import org.pcap4j.packet.DnsPacket;
+import org.pcap4j.packet.namednumber.DnsResourceRecordType;
+
+import java.io.EOFException;
+import java.net.Inet4Address;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.HashMap;
import java.util.List;
import java.util.Map;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Consumer;
/**
- * Entry point of the application.
+ * This is a system that reads PCAP files to compare
+ * patterns of DNS hostnames, packet sequences, and packet
+ * lengths with training data to determine certain events
+ * or actions for smart home devices.
*
* @author Janus Varmarken
+ * @author Rahmadi Trimananda (rtrimana@uci.edu)
+ * @version 0.1
*/
public class Main {
- public static void main(String[] args) {
- System.out.println("it works");
- }
- private String cloudIPAddress(String hostName) {
- if (hostName.equals("events.tplinkra.com"))
- return 205.251.203.26;
+ public static void main(String[] args) throws PcapNativeException, NotOpenException, EOFException, TimeoutException, UnknownHostException {
+ final String fileName = "/users/varmarken/Desktop/wlan1.local.dns.pcap";
+ List<DnsPacket> dnsPackets = extractDnsAnswerPackets(fileName);
+ Map<String, List<String>> ipToHostnameMap = constructIpToHostnameMap(dnsPackets);
+ ipToHostnameMap.forEach((k,v) -> System.out.println(String.format("%s => %s", k, v.toString())));
}
- // TODO move to separate class
- // Add parameter that is the trace to be analyzed (most like the pcap library's representation of a flow)
- public String findPattern(Map<String, List<Integer>> hostnameToPacketLengths, String smartPlugIp) {
+ private static List<DnsPacket> extractDnsAnswerPackets(String pcapFileName) throws PcapNativeException, NotOpenException, TimeoutException {
+ PcapHandle handle;
+ try {
+ handle = Pcaps.openOffline(pcapFileName, PcapHandle.TimestampPrecision.NANO);
+ } catch (PcapNativeException pne) {
+ handle = Pcaps.openOffline(pcapFileName);
+ }
+ // Apparently BPFs don't support "dns" protocol filter, so have to filter by port.
+ handle.setFilter("port 53", BpfProgram.BpfCompileMode.OPTIMIZE);
+ ArrayList<DnsPacket> result = new ArrayList<>();
+ try {
+ Packet packet;
+ while ((packet = handle.getNextPacketEx()) != null) {
+ DnsPacket dnsPacket = packet.get(DnsPacket.class);
+ // We only care about DNS answers.
+ if (dnsPacket != null && dnsPacket.getHeader().getAnswers().size() != 0) {
+ result.add(dnsPacket);
+ }
+ }
+ } catch (EOFException eof) {
+ // (Note have to resort to EOFException as handle.getStats().getNumPacketsCaptured() only works on Windows)
+ // Clean up.
+ handle.close();
+ }
+ System.out.println(String.format("Found %d DNS answers", result.size()));
+ return result;
+ }
- // No difference, output "Complete match"
- // If difference, output <Packet no, deviation from expected> for each packet
- return null;
+ private static Map<String, List<String>> constructIpToHostnameMap(List<DnsPacket> dnsPackets) throws UnknownHostException {
+ HashMap<String, List<String>> result = new HashMap<>();
+ for(DnsPacket dnsPacket : dnsPackets) {
+ // The hostname that this DNS reply provides answers for.
+ // TODO: safe to assume only one question?
+ String hostname = dnsPacket.getHeader().getQuestions().get(0).getQName().getName();
+ for(DnsResourceRecord answer : dnsPacket.getHeader().getAnswers()) {
+ // We only care about type A records
+ if (!answer.getDataType().equals(DnsResourceRecordType.A)) {
+ continue;
+ }
+ // Sanity check. For some reason the hostname appears to be the empty string in the answer .
+ // We hence have to assume that all answers correspond to a single question that holds the hostname as part of its object tree.
+ // Therefore, if there are more questions in one query-reply exchange, we are in trouble.
+ if (!answer.getName().getName().equals("") && !answer.getName().getName().equals(hostname)) {
+ throw new RuntimeException("[DNS parser] mismatch between hostname in question and hostname in answer");
+ }
+ // The IP in byte representation.
+ byte[] ipBytes = answer.getRData().getRawData();
+ // Convert to string representation.
+ String ip = Inet4Address.getByAddress(ipBytes).getHostAddress();
+ List<String> hostnameList = new ArrayList<>();
+ hostnameList.add(hostname);
+ // Update or insert depending on presence of key:
+ // Concat the existing list and the new list if ip already present as key,
+ // otherwise add an entry for ip pointing to new list.
+ result.merge(ip, hostnameList, (v1, v2) -> { v1.addAll(v2); return v1; });
+ }
+ }
+ return result;
}
+// /**
+// * Private class properties
+// */
+// private Pcap pcap;
+// private List<Pcap.Packet> listPacket;
+// private Map<String, String> mapIPAddressToHostname;
+//
+// /**
+// * Private class constants
+// */
+// private static final int DNS_PORT = 53;
+//
+// /**
+// * Constructor
+// *
+// * @param file name of the analyzed PCAP file
+// */
+// public Main(String file) throws IOException {
+//
+// pcap = Pcap.fromFile(file);
+// listPacket = pcap.packets();
+// mapIPAddressToHostname = new HashMap<String, String>();
+// }
+//
+//
+//
+//
+//
+// /**
+// * Private method that maps DNS hostnames to their
+// * respected IP addresses. This method iterates
+// * through the List<Pcap.Packet>, gets DNS packets,
+// * and gets the IP addresses associated with them.
+// */
+// private void mapHostnamesToIPAddresses() {
+//
+// int counter = 1;
+// for(Pcap.Packet packet : listPacket) {
+// System.out.print("# " + counter++);
+// // Check the packet type
+// if (packet._root().hdr().network() == Pcap.Linktype.ETHERNET) {
+// EthernetFrame ethFrame = (EthernetFrame) packet.body();
+// if (ethFrame.etherType() == EthernetFrame.EtherTypeEnum.IPV4) {
+// Ipv4Packet ip4Packet = (Ipv4Packet) ethFrame.body();
+//
+// System.out.print(" - Protocol: " + ip4Packet.protocol());
+// if (ip4Packet.protocol() == Ipv4Packet.ProtocolEnum.UDP) {
+// // DNS is UDP port 53
+// UdpDatagram udpData = (UdpDatagram) ip4Packet.body();
+// System.out.print(" - Source Port: " + udpData.srcPort());
+// System.out.print(" - Dest Port: " + udpData.dstPort());
+//
+// // Source port 53 means this is DNS response
+// if (udpData.srcPort() == DNS_PORT) {
+// KaitaiStream dnsStream = new ByteBufferKaitaiStream(udpData.body());
+// DnsPacket dnsPacket = new DnsPacket(dnsStream);
+// ArrayList<DnsPacket.Query> queries = dnsPacket.queries();
+// ArrayList<DnsPacket.Answer> answers = dnsPacket.answers();
+// String strDomainName = new String();
+// for(DnsPacket.Query query : queries) {
+// System.out.print(" - Queries: ");
+// DnsPacket.DomainName domainName = query.name();
+// ArrayList<DnsPacket.Label> labels = domainName.name();
+// for(int i = 0; i < labels.size(); i++) {
+// System.out.print(labels.get(i).name());
+// strDomainName = strDomainName + labels.get(i).name();
+// if(i < labels.size()-2) {
+// System.out.print(".");
+// strDomainName = strDomainName + ".";
+// }
+// }
+// break; // We are assuming that there is only one query
+// }
+// System.out.print(" - Answers " + answers.size());
+// for(DnsPacket.Answer answer : answers) {
+// System.out.print(" - TypeType: " + answer.type());
+// System.out.print(" - ClassType: " + answer.answerClass());
+// System.out.print("\n - Answers: ");
+// DnsPacket.Address address = answer.address();
+// if (answer.type() == DnsPacket.TypeType.A) {
+// String strAnswer = new String();
+// ArrayList<Integer> ipList = address.ip();
+// for(int i = 0; i < ipList.size(); i++) {
+// System.out.print(ipList.get(i));
+// strAnswer = strAnswer + Integer.toString(ipList.get(i));
+// if(i < ipList.size()-1) {
+// System.out.print(".");
+// strAnswer = strAnswer + ".";
+// }
+// }
+// mapIPAddressToHostname.put(strAnswer, strDomainName);
+// }
+// }
+// }
+// }
+// }
+// }
+// System.out.println();
+// }
+//// for(Map.Entry<String, String> entry : mapIPAddressToHostname.entrySet()) {
+//// if (entry.getValue().equals("devs.tplinkcloud.com")) {
+//// System.out.println(entry.getKey() + " - " + entry.getValue());
+//// }
+//// }
+// System.out.println("Total map size: " + mapIPAddressToHostname.size());
+// System.out.println("Answer for 13.33.41.8: " + mapIPAddressToHostname.get("13.33.41.8"));
+// System.out.println("Answer for 34.226.240.125: " + mapIPAddressToHostname.get("34.226.240.125"));
+// }
+//
+// /*private String cloudIPAddress(String hostName) {
+// if (hostName.equals("events.tplinkra.com"))
+// return "205.251.203.26";
+// else
+// return null;
+// }*/
+//
+// // TODO move to separate class
+// // Add parameter that is the trace to be analyzed (most like the pcap library's representation of a flow)
+// public String findPattern(Map<String, List<Integer>> hostnameToPacketLengths, String smartPlugIp) {
+//
+// // No difference, output "Complete match"
+// // If difference, output <Packet no, deviation from expected> for each packet
+// return null;
+// }
+//
+// public static void main(String[] args) {
+// System.out.println("it works");
+//
+// //String file = "/home/rtrimana/pcap_processing/smart_home_traffic/Code/Projects/SmartPlugDetector/pcap/wlan1.local.dns.pcap";
+// String file = "/home/rtrimana/pcap_processing/smart_home_traffic/Code/Projects/SmartPlugDetector/pcap/wlan1.remote.dns.pcap";
+//
+// try {
+// Main main = new Main(file);
+// main.mapHostnamesToIPAddresses();
+//
+// /*Pcap data = Pcap.fromFile(file);
+// List<Pcap.Packet> listPacket = data.packets();
+// System.out.println("Number of packets: " + listPacket.size());
+// System.out.println("===================");
+// for(Pcap.Packet packet : listPacket) {
+// if (packet._root().hdr().network() == Pcap.Linktype.ETHERNET) {
+// EthernetFrame eFrame = (EthernetFrame) packet.body();
+// if (eFrame.etherType() == EthernetFrame.EtherTypeEnum.IPV4) {
+// Ipv4Packet ip4Packet = (Ipv4Packet) eFrame.body();
+// byte[] srcIp = ip4Packet.srcIpAddr();
+// byte[] dstIp = ip4Packet.dstIpAddr();
+// System.out.println("Byte length source: " + srcIp.length + " Byte length dest: " + dstIp.length);
+// System.out.print("Source: ");
+// for(int i = 0; i < srcIp.length; i++) {
+// System.out.print(Byte.toUnsignedInt(srcIp[i]));
+// if(i < srcIp.length-1)
+// System.out.print(".");
+// }
+// System.out.print(" - Dest: ");
+// for(int i = 0; i < dstIp.length; i++) {
+// System.out.print(Byte.toUnsignedInt(dstIp[i]));
+// if(i < dstIp.length-1)
+// System.out.print(".");
+// else
+// System.out.println("\n");
+// }
+// }
+// }
+// }*/
+//
+// } catch (Exception e) {
+// e.printStackTrace();
+// }
+// }
}
projects / pingpong.git / blobdiff