Hi Harshitha,
On 26.09.24 07:14, Harshitha Prem wrote:
Hi Team,
The MLO interface requires support for multi-radio wiphy and we would
like to propose the following design for the wireless configuration file
to accommodate multi-radio wiphy. For the multi-radio wireless
configuration, we could use Wi-Fi devices named as radio0_band0,
radio0_band1, etc. This naming convention would be helpful for hardware
that includes a combination of one multi-radio capable wiphy
(radio0_band0, radio0_band1) and one non-multi-radio wiphy (radio1).
Sample multi-radio wireless configuration file:
config wifi-device radio0
option type mac80211
option channel 11
option hwmode 11g
option htmode HT20
# REMOVE THIS LINE TO ENABLE WIFI:
option disabled 1
config wifi-iface
option device radio0
option network lan
option mode ap
option ssid OpenWrt
option encryption none
config wifi-device radio1_band0
option type mac80211
option channel 36
option hwmode 11a
option htmode VHT80
# REMOVE THIS LINE TO ENABLE WIFI:
option disabled 1
option country US
config wifi-iface
option device radio1_band0
option network lan
option mode ap
option ssid OpenWrt
option encryption none
config wifi-device radio1_band1
option type mac80211
option channel 49
option hwmode 11a
option band 3
option htmode HE80
# REMOVE THIS LINE TO ENABLE WIFI:
option disabled 1
config wifi-iface
option device radio1_band1
option network lan
option mode ap
option ssid OpenWrt
option encryption sae
option sae_pwe 1
option key 0123456789
To configure a IEEE802.11be Multi-link Interface (MLD VAP), we could use
options such as mld in each wifi-iface section which are part of MLD and
introduce a new wireless configuration section, wifi-mld. This allows us
to couple multiple links together under a single interface and any ML
specific configurations could be updated under this section.
Please find the sample ML interface configuration below:
I have a different plan for supporting MLD already. In my staging tree,
I've been working on user space code for using the multi-radio wiphy
support that I added to cfg80211/mac80211.
The idea is to still have multiple wifi-device sections (like on your
proposal), but with an option radio <idx> matching the wiphy radio index.
The code will use my work-in-progress code for setting allowed radios
for each vif.
The next step (which I have not implemented yet) is to turn the device
option for a wifi-iface into a list, so that the same SSID can be
brought up on multiple radios without duplicating the section.
That should be supported for both MLD and non-MLD configurations, adding
an extra option to enable MLD for the SSID.
I want to retain the ability to bring individual wifi devices up and
down via the wifi command and make the hostapd ucode script responsible
for adding/removing MLD links accordingly.
I can go into more detail once I've made more progress with the code.
The next step for me is to rework the vif-allowed-radios code based on
feedback from Johannes and to complete the single-wiphy support for
legacy mode. After that I will move on to MLD.
- Felix
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