| #!/usr/bin/python |
| # |
| # Sigma Control API DUT (sniffer - P2P NoA check) |
| # Copyright (c) 2014, Qualcomm Atheros, Inc. |
| # All Rights Reserved. |
| # Licensed under the Clear BSD license. See README for more details. |
| |
| import sys |
| import subprocess |
| |
| infile = sys.argv[1] |
| bssid = sys.argv[2] |
| srcmac = sys.argv[3] |
| destmac = sys.argv[4] |
| |
| tshark = subprocess.Popen(['tshark', '-r', infile, |
| '-c', '1', |
| '-R', 'wlan.sa==' + bssid + " and wlan.fc.type_subtype==8", |
| '-Tfields', |
| '-e', 'radiotap.mactime', |
| '-e', 'wlan_mgt.fixed.timestamp', |
| '-e', 'wifi_p2p.noa.duration', |
| '-e', 'wifi_p2p.noa.interval', |
| '-e', 'wifi_p2p.noa.start_time', |
| '-e', 'frame.time_relative'], |
| stdout=subprocess.PIPE) |
| noa_data = tshark.stdout.read() |
| vals = noa_data.rstrip().split('\t') |
| mactime = int(vals[0]) |
| timestamp = int(vals[1], 16) |
| noa_duration = int(vals[2]) |
| noa_interval = int(vals[3]) |
| noa_start = int(vals[4]) |
| frame_time = float(vals[5]) |
| |
| if noa_start > timestamp: |
| print "FilterStatus,FAIL,reasonCode,Unexpected NoA Start Time after Beacon timestamp" |
| sys.exit() |
| |
| noa_start_mactime = mactime - (timestamp - noa_start) |
| noa_start_frame_time = frame_time - (timestamp - noa_start) / 1000000.0 |
| |
| debug = open(infile + ".txt", "w") |
| debug.write("mactime={}\ntimestamp={}\nnoa_duration={}\nnoa_interval={}\nnoa_start={}\nnoa_start_mactime={}\nnoa_start_frame_time={}\n".format(mactime, timestamp, noa_duration, noa_interval, noa_start, noa_start_mactime, noa_start_frame_time)) |
| |
| tshark = subprocess.Popen(['tshark', '-r', infile, |
| '-R', 'wlan.da==' + destmac + " and wlan.sa==" + srcmac, |
| '-Tfields', |
| '-e', 'frame.number', |
| '-e', 'radiotap.mactime', |
| '-e', 'frame.time_relative'], |
| stdout=subprocess.PIPE) |
| frames = tshark.stdout.read() |
| error_frame = None |
| debug.write("\nframenum mactime offset(mactime) offset(frametime)\n") |
| for f in frames.splitlines(): |
| vals = f.rstrip().split('\t') |
| framenum = int(vals[0]) |
| mactime = int(vals[1]) |
| frametime = float(vals[2]) |
| if mactime < noa_start_mactime: |
| print "FilterStatus,FAIL,reasonCode,Unexpected mactime before NoA Start Time" |
| sys.exit() |
| offset = (mactime - noa_start_mactime) % noa_interval |
| offset_t = ((frametime - noa_start_frame_time) * 1000000) % noa_interval |
| debug.write("{} {} {} {}\n".format(framenum, mactime, offset, offset_t)) |
| # allow 200 us as extra buffer to compensate for sniffer inaccuracy |
| allow_buffer = 200 |
| if offset > allow_buffer and offset + allow_buffer < noa_duration: |
| debug.write("Frame {} during GO absence (mactime) (mactime={}, offset={} usec, NoA-duration={} usec)\n".format(framenum, mactime, offset, noa_duration)) |
| error_frame = framenum |
| if offset_t > allow_buffer and offset_t + allow_buffer < noa_duration: |
| debug.write("Frame {} during GO absence (frametime) (frametime={}, offset={} usec, NoA-duration={} usec)\n".format(framenum, frametime, offset_t, noa_duration)) |
| #error_frame = framenum |
| |
| if error_frame: |
| print "FilterStatus,FAILURE,frameNumber," + str(error_frame) |
| else: |
| print "FilterStatus,SUCCESS" |