wifi-scripts: rewrite wifi detect code in ucode

Rely entirely on /etc/board.json instead of screen scraping iw cli output

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/config/wifi-scripts/files/lib/wifi/mac80211.uc

@@ -0,0 +1,94 @@
+#!/usr/bin/env ucode
+import { readfile } from "fs";
+import * as uci from 'uci';
+
+const bands_order = [ "6G", "5G", "2G" ];
+const htmode_order = [ "HE", "VHT", "HT" ];
+
+let board = json(readfile("/etc/board.json"));
+if (!board.wlan)
+	exit(0);
+
+let idx = 0;
+let commit;
+
+let config = uci.cursor().get_all("wireless") ?? {};
+
+function radio_exists(path, macaddr, phy) {
+	for (let name, s in config) {
+		if (s[".type"] != "wifi-device")
+			continue;
+		if (s.macaddr & lc(s.macaddr) == lc(macaddr))
+			return true;
+		if (s.phy == phy)
+			return true;
+		if (!s.path || !path)
+			continue;
+		if (substr(s.path, -length(path)) == path)
+			return true;
+	}
+}
+
+for (let phy_name, phy in board.wlan) {
+	let info = phy.info;
+	if (!info || !length(info.bands))
+		continue;
+
+	while (config[`radio${idx}`])
+		idx++;
+	let name = "radio" + idx++;
+
+	let s = "wireless." + name;
+	let si = "wireless.default_" + name;
+
+	let band_name = filter(bands_order, (b) => info.bands[b])[0];
+	if (!band_name)
+		continue;
+
+	let band = info.bands[band_name];
+	let channel = band.default_channel ?? "auto";
+
+	let width = band.max_width;
+	if (band_name == "2G")
+		width = 20;
+	else if (width > 80)
+		width = 80;
+
+	let htmode = filter(htmode_order, (m) => band[lc(m)])[0];
+	if (htmode)
+		htmode += width;
+	else
+		htmode = "NOHT";
+
+	if (!phy.path)
+		continue;
+
+	let macaddr = trim(readfile(`/sys/class/ieee80211/${phy_name}/macaddress`));
+	if (radio_exists(phy.path, macaddr, phy_name))
+		continue;
+
+	let id = `phy='${phy_name}'`;
+	if (match(phy_name, /^phy[0-9]/))
+		id = `path='${phy.path}'`;
+
+	print(`set ${s}=wifi-device
+set ${s}.type='mac80211'
+set ${s}.${id}
+set ${s}.band='${lc(band_name)}'
+set ${s}.channel='${channel}'
+set ${s}.htmode='${htmode}'
+set ${s}.disabled='1'
+
+set ${si}=wifi-iface
+set ${si}.device='${name}'
+set ${si}.network='lan'
+set ${si}.mode='ap'
+set ${si}.ssid='OpenWrt'
+set ${si}.encryption='none'
+
+`);
+	commit = true;
+}
+
+if (commit)
+	print("commit wireless\n");

package/network/config/wifi-scripts/files/sbin/wifi

@@ -178,6 +178,7 @@ wifi_config() {
 	[ -e /tmp/.config_pending ] && return
 	ucode /usr/share/hostap/wifi-detect.uc
 	[ ! -f /etc/config/wireless ] && touch /etc/config/wireless
+	ucode /lib/wifi/mac80211.uc | uci -q batch
 
 	for driver in $DRIVERS; do (
 		if eval "type detect_$driver" 2>/dev/null >/dev/null; then