1#!/usr/bin/env python 2# 3# Copyright (c) 2012, Intel Corporation 4# 5# Author: Johannes Berg <johannes@sipsolutions.net> 6# 7# This software may be distributed under the terms of the BSD license. 8# See README for more details. 9 10import sys, struct, re 11 12def write_pcap_header(pcap_file): 13 pcap_file.write( 14 struct.pack('<IHHIIII', 15 0xa1b2c3d4, 2, 4, 0, 0, 65535, 16 105 # raw 802.11 format 17 )) 18 19def pcap_addpacket(pcap_file, ts, data): 20 # ts in seconds, float 21 pcap_file.write(struct.pack('<IIII', 22 int(ts), int(1000000 * ts) % 1000000, 23 len(data), len(data))) 24 pcap_file.write(data) 25 26if __name__ == "__main__": 27 try: 28 input = sys.argv[1] 29 pcap = sys.argv[2] 30 except IndexError: 31 print "Usage: %s <log file> <pcap file>" % sys.argv[0] 32 sys.exit(2) 33 34 input_file = open(input, 'r') 35 pcap_file = open(pcap, 'w') 36 frame_re = re.compile(r'(([0-9]+.[0-9]{6}):\s*)?nl80211: MLME event frame - hexdump\(len=[0-9]*\):((\s*[0-9a-fA-F]{2})*)') 37 38 write_pcap_header(pcap_file) 39 40 for line in input_file: 41 m = frame_re.match(line) 42 if m is None: 43 continue 44 if m.group(2): 45 ts = float(m.group(2)) 46 else: 47 ts = 0 48 hexdata = m.group(3) 49 hexdata = hexdata.split() 50 data = ''.join([chr(int(x, 16)) for x in hexdata]) 51 pcap_addpacket(pcap_file, ts, data) 52 53 input_file.close() 54 pcap_file.close() 55