gluon-core: make wifi rates configurable by site.conf

and add documentation

docs/site-example/site.conf

@@ -35,6 +35,14 @@
     -- Wireless channel.
     channel = 1,
 
+    -- List of supported wifi rates (optional)
+    -- Example removes 802.11b compatibility for better performance
+    supported_rates = {6000, 9000, 12000, 18000, 24000, 36000, 48000, 54000},
+
+    -- List of basic wifi rates (optional, required if supported_rates is set)
+    -- Example removes 802.11b compatibility for better performance
+    basic_rate = {6000, 9000, 18000, 36000, 54000},
+
     -- ESSID used for client network.
     ap = {
       ssid = 'entenhausen.freifunk.net',

docs/user/site.rst

@@ -98,6 +98,12 @@ wifi24 \: optional
     This will only affect new installations.
     Upgrades will not changed the disabled state.
 
+    Additionally it is possible to configure the ``supported_rates`` and ``basic_rate``
+    of each radio. Both are optional, by default hostapd/driver dictate the rates.
+    If ``supported_rates`` is set, ``basic_rate`` is required, because ``basic_rate``
+    has to be a subset of ``supported_rates``.
+    The example below disables 802.11b rates.
+
     ``ap`` requires a single parameter, a string, named ``ssid`` which sets the
     interface's ESSID.
 
@@ -112,6 +118,8 @@ wifi24 \: optional
 
        wifi24 = {
          channel = 11,
+         supported_rates = {6000, 9000, 12000, 18000, 24000, 36000, 48000, 54000},
+         basic_rate = {6000, 9000, 18000, 36000, 54000},
          ap = {
            ssid = 'entenhausen.freifunk.net',
          },

package/gluon-core/check_site.lua

@@ -28,6 +28,14 @@ for _, config in ipairs({'wifi24', 'wifi5'}) do
     need_string('regdom') -- regdom is only required when wifi24 or wifi5 is configured
 
     need_number(config .. '.channel')
+
+    local rates = {1000, 2000, 5500, 6000, 9000, 11000, 12000, 18000, 24000, 36000, 48000, 54000}
+    local supported_rates = need_array_of(config .. '.supported_rates', rates, false)
+    if supported_rates then
+      need_array_of(config .. '.basic_rate', supported_rates, true)
+    else
+      need_array_of(config .. '.basic_rate', rates, false)
+    end
   end
 end
 

package/gluon-core/luasrc/lib/gluon/upgrade/200-wireless

@@ -27,6 +27,18 @@ local function configure_radio(radio, index, config)
     uci:set('wireless', radio, 'channel', channel)
     uci:set('wireless', radio, 'htmode', 'HT20')
     uci:set('wireless', radio, 'country', site.regdom)
+
+    if config.supported_rates then
+      uci:set_list('wireless', radio, 'supported_rates', config.supported_rates)
+    else
+      uci:delete('wireless', radio, 'supported_rates')
+    end
+
+    if config.basic_rate then
+      uci:set_list('wireless', radio, 'basic_rate', config.basic_rate)
+    else
+      uci:delete('wireless', radio, 'basic_rate')
+    end
   end
 end