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hostapd: add legacy_rates option to disable 802.11b data rates.

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Setting legacy_rates to 0 disables 802.11b data rates.
Setting legacy_rates to 1 enables 802.11b data rates. (Default)

The basic_rate option and supported_rates option are filtered based on this.

The rationale for the change, stronger now than in 2014, can be found in:

https://mentor.ieee.org/802.11/dcn/14/11-14-0099-00-000m-renewing-2-4ghz-band.pptx

The balance of equities between compatibility with b clients and the
detriment to the 2.4 GHz ecosystem as a whole strongly favors disabling b
rates by default.

Signed-off-by: Nick Lowe <nick.lowe@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name> [cleanup, defaults change]
This commit is contained in:
Nick Lowe 2017-03-27 10:50:23 +01:00 committed by Jo-Philipp Wich
parent 20198f7330
commit e194e1b3c8
1 changed files with 20 additions and 8 deletions
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28
package/network/services/hostapd/files/hostapd.sh
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@ -64,6 +64,7 @@ hostapd_common_add_device_config() {
config_add_string country
config_add_boolean country_ie doth
config_add_string require_mode
config_add_boolean legacy_rates
hostapd_add_log_config
}
@ -75,12 +76,15 @@ hostapd_prepare_device_config() {
local base="${config%%.conf}"
local base_cfg=
json_get_vars country country_ie beacon_int doth require_mode
json_get_vars country country_ie beacon_int doth require_mode legacy_rates
hostapd_set_log_options base_cfg
set_default country_ie 1
set_default doth 1
set_default legacy_rates 1
[ "$hwmode" = "b" ] && legacy_rates=1
[ -n "$country" ] && {
append base_cfg "country_code=$country" "$N"
@ -88,25 +92,33 @@ hostapd_prepare_device_config() {
[ "$country_ie" -gt 0 ] && append base_cfg "ieee80211d=1" "$N"
[ "$hwmode" = "a" -a "$doth" -gt 0 ] && append base_cfg "ieee80211h=1" "$N"
}
[ -n "$hwmode" ] && append base_cfg "hw_mode=$hwmode" "$N"
local brlist= br
json_get_values basic_rate_list basic_rate
for br in $basic_rate_list; do
hostapd_add_rate brlist "$br"
done
local rlist= r
json_get_values rate_list supported_rates
[ -n "$hwmode" ] && append base_cfg "hw_mode=$hwmode" "$N"
[ "$legacy_rates" -eq 0 ] && set_default require_mode g
[ "$hwmode" = "g" ] && {
[ "$legacy_rates" -eq 0 ] && set_default rate_list "6000 9000 12000 18000 24000 36000 48000 54000"
[ -n "$require_mode" ] && set_default basic_rate_list "6000 12000 24000"
}
case "$require_mode" in
g) brlist="60 120 240" ;;
n) append base_cfg "require_ht=1" "$N";;
ac) append base_cfg "require_vht=1" "$N";;
esac
local rlist= r
json_get_values rate_list supported_rates
for r in $rate_list; do
hostapd_add_rate rlist "$r"
done
for br in $basic_rate_list; do
hostapd_add_rate brlist "$br"
done
[ -n "$rlist" ] && append base_cfg "supported_rates=$rlist" "$N"
[ -n "$brlist" ] && append base_cfg "basic_rates=$brlist" "$N"
[ -n "$beacon_int" ] && append base_cfg "beacon_int=$beacon_int" "$N"