1 | initial version |
Only in 802.11ac
A quick look at the 3.4.x and main-branch code seems to indicate that if a frame manages to be identified as 11ac, the duration is always calculated. (Look for have_duration
being set to TRUE
.)
If somebody has an 11ac capture where the 802.11 radio information shows the PHY as 11ac:
PHY type: 802.11ac (VHT)
and there's no duration information, please file an issue on the Wireshark issue list and attach a capture file containing at least one frame where that's the case, so we can determine why that's happening.
Note that a routine used when calculating the duration for 11ac has a comment that says:
"NOTE: this is a crude quick hack, need proper calculation of bits/symbols/FEC/etc"
so the duration might not be as accurate as you might like.
For 11n, the code will not try to calculate the duration if:
and maybe 802.11ax
There is currently no code to calculate the duration for 11ax, because nobody's written it.