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