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View Code? Open in Web Editor NEW802.11 radiotap and MPDU parser
License: Other
802.11 radiotap and MPDU parser
License: Other
I have some issues:
data:3d2118a6f711e7b90000000000000000000000000000000000000000000000000000000000000b000080020000000040000000ffffffffffff3ea659ce780bffffffffffff40570000010802040b160c12182432043048606c03010b2d1a7e0113ff00000001000000000000000100000000000000000000
ERROR:asyncio:Exception in callback _SelectorDatagramTransport._read_ready()
handle: <Handle _SelectorDatagramTransport._read_ready()>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/asyncio/events.py", line 88, in _run
self._context.run(self._callback, *self._args)
File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 973, in _read_ready
self._protocol.datagram_received(data, addr)
File "radar-server.py", line 62, in datagram_received
dR1,DM1,l3,err = sushi.bento(data[36:])
File "/home/radar/.local/lib/python3.7/site-packages/itamae/sushi.py", line 51, in bento
dM = mpdu.parse(f[dR.size:],'fcs' in dR.flags)
TypeError: argument of type 'NoneType' is not iterable
data:3d2118a6f711e7b900000000000000000000000000000000000000000000000000000000000018002e4000a02008000000026c09a000b9000000b90040000000ffffffffffffdaa1198def87fffffffffffff0820000010402040b1632080c1218243048606c0301012d1a6e0103ff00000000000000000000000000000000000000000000dd070050f2080001007f0500000a0201
ERROR:asyncio:Exception in callback _SelectorDatagramTransport._read_ready()
handle: <Handle _SelectorDatagramTransport._read_ready()>
Traceback (most recent call last):
File "/usr/local/lib/python3.7/asyncio/events.py", line 88, in _run
self._context.run(self._callback, *self._args)
File "/usr/local/lib/python3.7/asyncio/selector_events.py", line 973, in _read_ready
self._protocol.datagram_received(data, addr)
File "radar-server.py", line 62, in datagram_received
dR1,DM1,l3,err = sushi.bento(data[36:])
File "/home/radar/.local/lib/python3.7/site-packages/itamae/sushi.py", line 51, in bento
dM = mpdu.parse(f[dR.size:],'fcs' in dR.flags)
File "/home/radar/.local/lib/python3.7/site-packages/itamae/mpdu.py", line 299, in parse
if m.type == std.FT_MGMT: _mpdu._parsemgmt_(f,m)
File "/home/radar/.local/lib/python3.7/site-packages/itamae/_mpdu.py", line 414, in _parsemgmt_
ie = _parseie_(eid,ie)
File "/home/radar/.local/lib/python3.7/site-packages/itamae/_mpdu.py", line 465, in _parseie_
info = [_eidrates_(struct.unpack('=B',r)[0]) for r in info]
File "/home/radar/.local/lib/python3.7/site-packages/itamae/_mpdu.py", line 465, in <listcomp>
info = [_eidrates_(struct.unpack('=B',r)[0]) for r in info]
TypeError: a bytes-like object is required, not 'int'
I'm using this tool to get packets that processed by ESP8266 MAC Layer with the help of this tool (https://github.com/ernacktob/esp8266_wifi_raw/).
However, I got many errors when parsing these packets with mpdu.parse
for example, first line is the packet and second line is the result.
80000000fffffffffffffcb698f61380fcb698f61380e0a78081362feb0100002c01211400075748552d535455010882840b160c1218240301010504000100010706434e20010d142a010032043048606c460571000000002d1a8c0103ffff0000000000000000000001000000000000000000003d16010005000000000000000000000000000000000000007f080000080000000440dd180050f2020101030003a4000027a4000042435e0062322f00dd0900037f01010000ff7f00004243
{'info-elements': {0: [u'WHU-STU', u''], 3: [1], 5: [{'dtim-cnt': 0, 'bm-ctrl': {'tib': 0, 'offset': 0}, 'dtim-per': 1, 'vir-bm': '01'}], 7: [{'country': bytearray(b'CN '), 'op-tuples': [(67, 78, 32), (1, 13, 20)]}], 42: [{'use-protect': 0, 'barker': 0, 'non-erp': 0, 'rsrv': 0}], 45: [{'ht-info': {'ch-width-set': 0, '40-intolerant': 0, 'dsss-cck-mod': 0, 'rsrv': 0, 'ldpc-cap': 0, 'lsig-txop-pro': 0, 'max-amsdu': 0, 'tx-stbc': 1, 'short-gi-40': 0, 'rx-stbc': 1, 'short-gi-20': 0, 'ht-greenfield': 0, 'ht-delay-back': 0, 'sm-pwr-save': 3}, 'ampdu-param': {'max-length': 3, 'min-spacing': 0, 'rsrv': 0}, 'asel-cap': {'ant-cap': 0, 'tx-ppdu-cap': 0, 'rsrv': 0, 'ant-asel-cap': 0, 'recv-asel-cap': 0, 'csi-asel-cap': 0, 'ant-sel': 0, 'csi-cap': 0}, 'tx-beamform': {'rx-stag-sound': 0, 'tx-csi-feedback': 0, 'rsrv': 0, 'calibration': 0, 'rx-ndp': 0, 'csi-tx': 0, 'noncompressed-feedback': 0, 'compressed-feedback': 0, 'comp-antenna': 0, 'csi-max-rows': 0, 'csi-antenna': 0, 'tx-bf-cap': 0, 'rx-cap': 0, 'compressed': 0, 'tx-stag-sound': 0, 'noncomp-antenna': 0, 'tx-ndp': 0, 'ch-est-cap': 0, 'min-grouping': 0, 'noncompressed': 0}, 'mcs-set': {'tx-max-num-spatial': 0, 'tx/rx-mcs-set-unequal': 0, 'tx-highest-sup-data-rate': 0, 'tx-ms-set-defined': 1, 'tx-unequal-mod': 0, 'rx-mcs-bitmask': [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'rsrv-1': 0, 'rsrv-2': 0, 'rsrv-3': 0}, 'ht-ext-cap': {'+htc': 0, 'mcs-feedback': 0, 'rd-resp': 0, 'pco': 0, 'rsrv-1': 0, 'rsrv-2': 0, 'pco-transit': 0}}], 221: [{'content': bytearray(b"\x02\x01\x01\x03\x00\x03\xa4\x00\x00\'\xa4\x00\x00BC^\x00b2/\x00"), 'oui': '00:50:f2'}, {'content': bytearray(b'\x01\x01\x00\x00\xff\x7f'), 'oui': '00:03:7f'}], 61: [{'mcs-set': {'tx-max-num-spatial': 0, 'tx/rx-mcs-set-unequal': 0, 'tx-highest-sup-data-rate': 0, 'tx-ms-set-defined': 0, 'tx-unequal-mod': 0, 'rx-mcs-bitmask': [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], 'rsrv-1': 0, 'rsrv-2': 0, 'rsrv-3': 0}, 'ht-op-info': {'pco-phase': 0, 'non-greenfield': 1, 'sta-ch-width': 0, 'rifs': 0, 'obss-non-ht': 0, 'lsig-txop-pro': 0, 'dual-cts': 0, 'ht-pro': 1, 'dual-beacon': 0, 'stbc-beacon': 0, 'pco-active': 0, 'rsrv-4': 0, 'rsrv-5': 0, 'sec-ch-off': 0, 'rsrv-1': 0, 'rsrv-2': 0, 'rsrv-3': 0}, 'pri-ch': 1}]}, 'err': [('mgmt.info-elements.eid-1', "parsing <type 'exceptions.RuntimeError'>-unpack requires a string argument of length 1"), ('mgmt.info-elements.eid-50', "parsing <type 'exceptions.RuntimeError'>-unpack requires a string argument of length 1"), ('mgmt.info-elements.eid-70', "parsing <type 'exceptions.TypeError'>-an integer is required"), ('mgmt.info-elements.eid-127', "parsing <type 'exceptions.EnvironmentError'>-[Errno 127] subelement has length"), ('mgmt.info-elements.eid-66', "parsing <type 'exceptions.RuntimeError'>-unpack requires a string argument of length 1")], 'stripped': 0, 'addr1': 'ff:ff:ff:ff:ff:ff', 'seqctrl': {'seqno': 2686, 'fragno': 0}, 'fixed-params': {'capability': {'rdo-meas': 1, 'dsss-ofdm': 0, 'cfpollable': 0, 'ess': 1, 'privacy': 0, 'ibss': 0, 'ch-agility': 0, 'immediate-ba': 0, 'spec-mgmt': 0, 'time-slot': 1, 'pbcc': 0, 'cf-poll-req': 0, 'delayed-ba': 0, 'short-pre': 1, 'apsd': 0, 'qos': 0}, 'timestamp': 2109621043584L, 'beacon-int': 307200}, 'addr2': 'fc:b6:98:f6:13:80', 'addr3': 'fc:b6:98:f6:13:80', 'offset': 258, 'duration': {'dur': 0, 'type': 'vcs'}, 'framectrl': {'subtype': 8, 'vers': 0, 'type': 0, 'flags': {'md': 0, 'mf': 0, 'o': 0, 'r': 0, 'fd': 0, 'pf': 0, 'td': 0, 'pm': 0}}, 'present': ['framectrl', 'duration', 'addr1', 'addr2', 'addr3', 'seqctrl', 'fixed-params', 'info-elements']}
I'm not sure if it's the problem during my packet sniffing or parsing.
By the way, In _mpdu.py#417 the except RuntimeError
should be except RuntimeError as e:
or except Exception as e:
. otherwise it will crash directly with the input.
This is the code I'm using and the data I collected.
https://gist.github.com/Yangff/7f88e7503ce15e8bc8a7c4b1a06ca5f2
Hi,
I think there is a problem when parsing 802.11n data rate. Although the 3 Bytes for mcs are retrieved correctly, when I call
dR2 = rtap.parse(raw2)
dR2.rate
it gives me slightly different rate than when I parse the same packets with wireshark.
I use ath10k and
iw mon0 set freq 5180 80 5210
and monitor my mobile phone traffic.
I tracked the problem to your code in mcs.py and I noticed that in your MCS_HT_RATES
list you might have put the Guard Interval bits in different order.
By having a look here http://mcsindex.com/ and here http://www.radiotap.org/fields/MCS.html we know that if for example this 07 05 07
is the hex representation of MCS field, from the second Byte we get that Bandwidth is 40(2 least significant bits) and from the 3d bit we get "1" which means GI=short GI. From the third Byte we get mcs_index = 7.
Now in your mcs_rate() function the 7th element from the list is called
{20:{1:65,0:72.2},40:{1:135,0:150}}, # mcs index 7
with bandwidth 40 and guard interval 1 which points to 135 instead of 150 as the rate should be based on mcsindex.com --> Data Rate SGI = 400ns 40MHZ mcs index 7 = 150
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