1#!/usr/bin/env python3 2# 3# Copyright (c) 2012-2022, 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 11from binascii import unhexlify 12 13def write_pcap_header(pcap_file): 14 pcap_file.write( 15 struct.pack('<IHHIIII', 16 0xa1b2c3d4, 2, 4, 0, 0, 65535, 17 105 # raw 802.11 format 18 )) 19 20def pcap_addpacket(pcap_file, ts, data): 21 # ts in seconds, float 22 pcap_file.write(struct.pack('<IIII', 23 int(ts), int(1000000 * ts) % 1000000, 24 len(data), len(data))) 25 pcap_file.write(data) 26 27if __name__ == "__main__": 28 try: 29 input = sys.argv[1] 30 pcap = sys.argv[2] 31 except IndexError: 32 print("Usage: %s <log file> <pcap file>" % sys.argv[0]) 33 sys.exit(2) 34 35 input_file = open(input, 'r') 36 pcap_file = open(pcap, 'wb') 37 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})*)') 38 39 write_pcap_header(pcap_file) 40 41 for line in input_file: 42 m = frame_re.match(line) 43 if m is None: 44 continue 45 if m.group(2): 46 ts = float(m.group(2)) 47 else: 48 ts = 0 49 hexdata = m.group(3) 50 hexdata = hexdata.split() 51 data = unhexlify("".join(hexdata)) 52 pcap_addpacket(pcap_file, ts, data) 53 54 input_file.close() 55 pcap_file.close() 56