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According to the man page, Ubuntu only supports the following fields:

IEEE80211_RADIOTAP_TSFT

IEEE80211_RADIOTAP_FLAGS

IEEE80211_RADIOTAP_RATE

IEEE80211_RADIOTAP_CHANNEL

IEEE80211_RADIOTAP_DBM_ANTSIGNAL

IEEE80211_RADIOTAP_DBM_ANTNOISE

IEEE80211_RADIOTAP_DBM_TX_POWER

IEEE80211_RADIOTAP_ANTENNA

IEEE80211_RADIOTAP_DB_ANTSIGNAL

IEEE80211_RADIOTAP_DB_ANTNOISE

IEEE80211_RADIOTAP_XCHANNEL

I want to write a kernel module that will supply the VHT and MCS fields if the driver can provide them.

I've written kernel modules before, but it's been a while, and I'm not sure exactly where to start for network stuff. I would appreciate a general outline if anyone is able to give it.

TechnoSam
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    I regret that version 14.04 has reached end of life https://wiki.ubuntu.com/Releases and https://askubuntu.com/help/on-topic states in part: "You should avoid asking questions regarding...Support for versions for Ubuntu releases past their Support or "End of Life" (EOL) — unless the question is asking how to upgrade to a supported release." However https://ubuntuforums.org/ and http://www.linuxforums.org/forum/ may be helpful as might https://answers.launchpad.net/ubuntu/+questions?field.search_text=14.04+kernel – K7AAY Aug 19 '19 at 23:25
  • Also https://www.linuxquestions.org/ may be helpful. – K7AAY Aug 19 '19 at 23:47
  • If you are using Ubuntu 14.04 ESM (supported by Canonical) you can use your Ubuntu Advantage support options (which isn't here). – guiverc Aug 20 '19 at 01:45
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    @K7AAY I edited my question. Ubuntu 18.04 has the same issue, so I expect that the general starting point would probably be the same for me. Even if it's not, it would still be helpful. – TechnoSam Aug 20 '19 at 13:30
  • Anyway this question is too broad for AU. – Pilot6 Aug 20 '19 at 13:41
  • Over my (wooden) head, but these may be helpful: https://askubuntu.com/questions/1111417/unable-to-build-simple-hello-world-kernel-module https://askubuntu.com/questions/184593/reverse-engineer-driver-for-multi-colored-backlit-keyboard-on-clevo-laptops/274600#274600 https://askubuntu.com/questions/57119/building-a-new-vanilla-kernel-some-confusion-with-the-produced-debs – K7AAY Aug 20 '19 at 15:16

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