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802.11 radio information

asked 2021-11-25 08:34:33 +0000

For 802.11 can anyone tell me

1) Where does wireshark get the radio information->PHY type value from?

2) How does wireshark calculate the radio information->duration for 11a and 11b? (I've tried looking at the C code but I can't get that to agree with the values I'm actually seeing in wireshark.

Thanks.

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answered 2021-11-28 12:24:25 +0000

grahamb gravatar image

Presuming you're looking for info on the wlan_radio.phy and wlan_radio.duration fields, packet-ieee80211-radio.c derives these values.

  • wlan_radio.phy is derived from the 802.11 pseudo-header in dissect_wlan_radio_phdr().
  • wlan_radio.duration is derived in the same function, depending on many factors in the actual frame.
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Asked: 2021-11-25 08:34:10 +0000

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Last updated: Nov 28 '21