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wifi-scripts: fix missing VHT capabilities detection

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* Add missing parentheses in the conditionals for VHT160/VHT160-80PLUS80
  and VHT_MAX_MPDU capabilities. The missing parentheses caused the bitwise
  AND to be evaluated after the equality comparison due to ECMA's operator
  precedence, where `==` has higher precedence than `&`.

* Fix Max MPDU length detection by changing the comparison operators to
  `>=` vs `>` otherwise the condition would never be met.

* Add missing default values:
  - `true` value for `short_gi_80` (As it exists for `short_gi_20`, `short_gi_40`, `short_gi_160`)
  - `7` for `vht_max_mpdu` (Without it the loop in MAX-MPDU-* calculation always compares with null)

* Change the `vht160` condition to `config.vht160 <= 2`. This flag is
  `2` by default, and only ever set to `0` when `vht_oper_chwidth < 2`.

Signed-off-by: Sean Khan <datapronix@protonmail.com>
Link: https://github.com/openwrt/openwrt/pull/18013
Signed-off-by: John Crispin <john@phrozen.org>
This commit is contained in:
Sean Khan
2025-02-17 17:08:09 -05:00
committed by John Crispin
parent 1851131427
commit eabea737fa
2 changed files with 8 additions and 6 deletions
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8
package/network/config/wifi-scripts/files-ucode/usr/share/ucode/wifi/hostapd.uc
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@@ -338,15 +338,15 @@ function device_htmode_append(config) {
config.vht_capab += '[BF-ANTENNA-' + min(((vht_capab >> 13) & 3) + 1, config.beamformer_antennas) + ']';
/* supported Channel widths */
if (vht_capab & 0xc == 8 && config.vht160 <= 2)
if ((vht_capab & 0xc) == 8 && config.vht160 <= 2)
config.vht_capab += '[VHT160-80PLUS80]';
else if (vht_capab & 0xc == 4 && config.vht160 <= 1)
else if ((vht_capab & 0xc) == 4 && config.vht160 <= 2)
config.vht_capab += '[VHT160]';
/* maximum MPDU length */
if (vht_capab & 3 > 1 && config.vht_max_mpdu > 11454)
if ((vht_capab & 3) > 1 && config.vht_max_mpdu >= 11454)
config.vht_capab += '[MAX-MPDU-11454]';
else if (vht_capab & 3 && config.vht_max_mpdu > 7991)
else if ((vht_capab & 3) && config.vht_max_mpdu >= 7991)
config.vht_capab += '[MAX-MPDU-7991]';
/* maximum A-MPDU length exponent */