What does "absent" mean on some fields of the radiotap header?
Hi,
To see the detailed PHY information of the 802.11ac packets, I am using wireshark to parse the .pcap file, which is captured by tcpdump.
However, some of my interested fields under radiotap header appear to be "absent". By "absent", I cannot know whether it means true or false.
So what does "absent" exactly mean? Can I interpret that as false?
Yanbo
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