Adding new analysis - incoming (not yet including outgoing) packets inter-arrival...

[pingpong.git] / parser / parse_inter_arrival_time.py

diff --git a/parser/parse_inter_arrival_time.py b/parser/parse_inter_arrival_time.py
new file mode 100644 (file)
index 0000000..798c7eb
--- /dev/null
+++ b/parser/parse_inter_arrival_time.py
@@ -0,0 +1,125 @@
+#!/usr/bin/python
+
+"""
+Script that takes a file (output by wireshark/tshark, in JSON format) and analyze
+the packet inter-arrival times of a certain device at a certain time.
+"""
+
+import sys
+import json
+import numpy as np
+from collections import defaultdict
+from dateutil import parser
+from decimal import *
+
+JSON_KEY_SOURCE = "_source"
+JSON_KEY_LAYERS = "layers"
+
+JSON_KEY_ETH = "eth"
+JSON_KEY_ETH_DST = "eth.dst"
+JSON_KEY_ETH_SRC = "eth.src"
+JSON_KEY_FRAME = "frame"
+JSON_KEY_FRAME_TIME = "frame.time_epoch"
+TABLE_HEADER_X = "Packet number"
+TABLE_HEADER_Y = "Time (seconds)"
+INCOMING_APPENDIX = "_incoming"
+OUTGOING_APPENDIX = "_outgoing"
+FILE_APPENDIX = ".dat"
+
+
+def save_to_file(tblheader, timestamp_list, filenameout):
+    """ Show summary of statistics of PCAP file
+        Args:
+            tblheader: header for the saved table
+            dictionary: dictionary to be saved
+            filename_out: file name to save
+    """
+    # Appending, not overwriting!
+    f = open(filenameout, 'a')
+    # Write the table header
+    f.write("# " + tblheader + "\n")
+    f.write("# " + TABLE_HEADER_X + " " + TABLE_HEADER_Y + "\n")
+    # Write "0 0" if dictionary is empty
+    if not timestamp_list:
+        f.write("0 0")
+        f.close()
+        print "Writing zeroes to file: ", filenameout
+        return
+    ind = 0
+    # Iterate over list and write index-value pairs
+    for val in timestamp_list:
+        # Space separated
+        f.write(str(ind) + " " + str(timestamp_list[ind]) + "\n")
+        ind += 1
+    f.close()
+    print "Writing output to file: ", filenameout
+
+
+def main():
+    """ Main function
+    """
+    if len(sys.argv) < 5:
+        print "Usage: python", sys.argv[0], "<input_file> <output_file> <device_name> <mac_address>"
+        return
+    # Parse the file for the specified MAC address
+    timestamplist_incoming = parse_json(sys.argv[1], sys.argv[4])
+    # Write statistics into file
+    print "====================================================================="
+    print "==> Analyzing incoming traffic ..."
+    save_to_file(sys.argv[3] + INCOMING_APPENDIX, timestamplist_incoming, sys.argv[2] + INCOMING_APPENDIX + FILE_APPENDIX)
+    print "====================================================================="
+    #print "==> Analyzing outgoing traffic ..."
+    #save_to_file(sys.argv[3] + OUTGOING_APPENDIX, timestamplist_outgoing, sys.argv[2] + OUTGOING_APPENDIX + FILE_APPENDIX)
+    #print "====================================================================="
+
+
+# Convert JSON file containing DNS traffic to a map in which a hostname points to its set of associated IPs.
+def parse_json(filepath, macaddress):
+    """ Show summary of statistics of PCAP file
+        Args:
+            filepath: path of the read file
+            macaddress: MAC address of a device to analyze
+    """
+    # Maps timestamps to frequencies of packets
+    timestamplist = list()
+    with open(filepath) as jf:
+        # Read JSON.
+        # data becomes reference to root JSON object (or in our case json array)
+        data = json.load(jf)
+        # Loop through json objects in data
+        # Each entry is a pcap entry (request/response (packet) and associated metadata)
+        # Preserve two pointers prev and curr to iterate over the timestamps
+        prev = None
+        curr = None
+        for p in data:
+            # p is a JSON object, not an index
+            layers = p[JSON_KEY_SOURCE][JSON_KEY_LAYERS]
+            # Get timestamp
+            frame = layers.get(JSON_KEY_FRAME, None)
+            timestamp = Decimal(frame.get(JSON_KEY_FRAME_TIME, None))
+            # Get into the Ethernet address part
+            eth = layers.get(JSON_KEY_ETH, None)
+            # Skip any non DNS traffic
+            if eth is None:
+                print "[ WARNING: Packet has no ethernet address! ]"
+                continue
+            # Get source and destination MAC addresses
+            src = eth.get(JSON_KEY_ETH_SRC, None)
+            dst = eth.get(JSON_KEY_ETH_DST, None)
+            # Get and count the traffic for the specified MAC address
+            if dst == macaddress:
+                # Check if timestamp already exists in the map
+                # If yes, then just increment the frequency value...
+                print str(timestamp) + " - src:" + str(src) + " - dest:" + str(dst)
+                curr = timestamp
+                if prev is not None:
+                    inter_arrival_time = curr - prev
+                    timestamplist.append(inter_arrival_time)
+                prev = curr
+
+    return timestamplist
+
+
+if __name__ == '__main__':
+    main()
+