From 779cbe97956941eea1dcbb8b2266166d29eb41d2 Mon Sep 17 00:00:00 2001
From: Astro <astro@spaceboyz.net>
Date: Wed, 1 Nov 2023 01:14:24 +0100
Subject: [PATCH] pkgs/openwrt/uci-config: properly set mobility_domain, nasid
 to fix fast transition

---
 nix/pkgs/openwrt/uci-config.nix | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/nix/pkgs/openwrt/uci-config.nix b/nix/pkgs/openwrt/uci-config.nix
index 7619721..7e147b2 100644
--- a/nix/pkgs/openwrt/uci-config.nix
+++ b/nix/pkgs/openwrt/uci-config.nix
@@ -272,6 +272,7 @@ in
       ${concatMapStrings (ssid:
         let
           ssidConfig = radioConfig.ssids.${ssid};
+          netConfig = config.site.net.${ssidConfig.net};
 
           # mapping our option to openwrt/hostapd setting
           encryption = {
@@ -286,6 +287,11 @@ in
             then ssidConfig.ifname
             else "${ifPrefix}-${ssidConfig.net}";
 
+          pad = len: prefix: s:
+            if builtins.stringLength s < len
+            then pad len prefix "${prefix}${s}"
+            else s;
+
         in ''
           uci add wireless wifi-iface
           uci set wireless.@wifi-iface[-1].ifname=${ifname}
@@ -316,7 +322,15 @@ in
           uci set wireless.@wifi-iface[-1].ieee80211r=1
           uci set wireless.@wifi-iface[-1].ft_over_ds=1
           uci set wireless.@wifi-iface[-1].ft_psk_generate_local=1
-          uci set wireless.@wifi-iface[-1].ieee80211v=1
+          uci set wireless.@wifi-iface[-1].nasid='${pad 12 "0" (
+            toString ((lib.toInt (lib.removePrefix "ap" hostName)) * 65536 + index)
+          )}'
+          ${lib.optionalString (netConfig.vlan != null) ''
+            uci set wireless.@wifi-iface[-1].mobility_domain='${
+              pad 4 "0" (lib.toHexString (49920 + netConfig.vlan))
+            }'
+          ''}
+          uci set wireless.@wifi-iface[-1].bss_transition=1
           uci set wireless.@wifi-iface[-1].ft_bridge=${mgmtInterface}
         ''
       ) (builtins.attrNames radioConfig.ssids)}