| #!/usr/bin/env python |
| # |
| # Copyright (c) 2012, Intel Corporation |
| # |
| # Author: Johannes Berg <johannes@sipsolutions.net> |
| # |
| # This software may be distributed under the terms of the BSD license. |
| # See README for more details. |
| |
| import sys, struct, re |
| |
| def write_pcap_header(pcap_file): |
| pcap_file.write( |
| struct.pack('<IHHIIII', |
| 0xa1b2c3d4, 2, 4, 0, 0, 65535, |
| 105 # raw 802.11 format |
| )) |
| |
| def pcap_addpacket(pcap_file, ts, data): |
| # ts in seconds, float |
| pcap_file.write(struct.pack('<IIII', |
| int(ts), int(1000000 * ts) % 1000000, |
| len(data), len(data))) |
| pcap_file.write(data) |
| |
| if __name__ == "__main__": |
| try: |
| input = sys.argv[1] |
| pcap = sys.argv[2] |
| except IndexError: |
| print "Usage: %s <log file> <pcap file>" % sys.argv[0] |
| sys.exit(2) |
| |
| input_file = open(input, 'r') |
| pcap_file = open(pcap, 'w') |
| 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})*)') |
| |
| write_pcap_header(pcap_file) |
| |
| for line in input_file: |
| m = frame_re.match(line) |
| if m is None: |
| continue |
| if m.group(2): |
| ts = float(m.group(2)) |
| else: |
| ts = 0 |
| hexdata = m.group(3) |
| hexdata = hexdata.split() |
| data = ''.join([chr(int(x, 16)) for x in hexdata]) |
| pcap_addpacket(pcap_file, ts, data) |
| |
| input_file.close() |
| pcap_file.close() |
