Reconfigure hostapd per BSS

Shay Bar at
Tue Jun 30 01:11:19 EDT 2020

On 29/06/2020 19:53, John Crispin wrote:
> External Email
> On 24.06.20 07:16, Shay Bar wrote:
>> Hi Jouni,
>> In current code, SIGHUP can be used to reconfigure hostapd.
>> Upon this signal hostapd will read .conf file and reconfigure.
>> In case of MBSS, I find it useful to be able to reconfigure only
>> specific BSS(s) without interfering other BSS's currently running.
>> I want to implement such mechanism and want your opinion.
>> I waver between two options:
>> 1. Add BSS reload mask (of BSS's) to .conf file so that only the
>>      BSS's enabled in the bitmask will be reconfigured from the
>>      conf file upon SIGHUP.
>> 2. Add hostapd_cli RECONFIGURE option that receive as
>>       parameter the BSS's bitmask and reconfigures
>>       (from .conf file).only the enabled BSS's.
>> Appreciate your feedback.
>> Thanks,
>> Shay.
> Hi Shay,
> we are carrying a patch inside openwrt doing something similar [1]. it
> basically introduces a radio_id and config_id option, where we put a
> hash of the radio/bss section of the config file. when you call reload,
> hostapd will only restart that specific BSS. THis has been working for
> people in the field, and changes to one BSS wont interrupt the
> connectivity of others on the same phy. been meaning to send this
> updtream for a while. might be the time to do so now.
>      John
> [1]
Hi John,

Exactly what I need!
will wait for your upstream patch.

I would add to the patch:
1. hostapd.conf description of radio_config_id and config_id parameters.
2. Example how to trigger that reload (changing SSID of a specific BSS
for example).

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