Automatic hotspot hosting & joining

[bulzipke]

20250420_182800.mp4

Left: Host
Right: Client

Short Summary
Added Adhoc (Hotspot) feature for local Netplay with nearby players.
Users can now play Netplay together without going through a router.

Detailed Description

1. configs/knulli-board.common

   • Added HOSTAPD/DNSMASQ packages for creating Wi-Fi host mode.

2. package/batocera/core/batocera-system/batocera.conf

   • Added Wi-Fi SSID/Key settings for adhoc (hotspot) usage.

3. board/batocera/fsoverlay/etc/init.d/S20connman

   • Added .adhoc configuration.
   • It has the lowest priority among Wi-Fi connections.
   • If no user setting is found, it will load the default value from datainit.

4. package/batocera/core/batocera-configgen/scripts/adhoc_hooks.sh

   • This script runs before starting a game.
   • It checks hotspot option, wlan0 availability, and current Wi-Fi connection status to create a hotspot if needed.

5. package/batocera/core/batocera-scripts/scripts/batocera-wifi

   • ES to check connection status after joining a game via hotspot.

from knulli-cfw#326

[crcerror]

I did not check the whole coding but would it be possible to use a single service script instead od init.d plus an additional /usr/script? I like the idea but I think it would be nice to activate this all by ES + user choice.