# SPDX-License-Identifier: GPL-3.0-only
#
# Copyright 2016 Tim Niemeyer
# Copyright 2022 Fabian Bläse

wifiListRadio() {
	if [ $# -ne "0" ]
	then
		echo "Usage: wifiListRadio"
		return 1
	fi

	uci -q show wireless | sed -n 's,.*\.\([a-z0-9]*\)=wifi-device,\1,p'
	return 0
}

wifiGetFreq() {
	if [ $# -ne "1" ]
	then
		echo "Usage: wifiGetFreq <radio>"
		return 1
	fi

	local radio=$1

	# Use uci radio band for switching, since this is always set by firmware (effectively hard-coded)
	# Do not use channel, as this might be "auto" for both
	[ "$(uci get "wireless.${radio}.band")" = "5g" ] && echo "5" || echo "2"
	return 0
}

wifiRadioSupportsOWE() {
	if [ $# -ne "1" ]
	then
		echo "Usage: wifiGetMacIndexDriver <path>"
		return 1
	fi

	local phy=$(ls /sys/devices/$1/ieee80211/ | head -n1)
	[ -n "$phy" ] || return 1

	local file="/sys/kernel/debug/ieee80211/$phy/hwflags"

	grep -q "MFP_CAPABLE" "$file" || return 1

	return 0
}

wifiGetMacIndexDriver() {
	# adopted from OpenWrt: /lib/netifd/wireless/mac80211.sh -> mac80211_get_addr()

	if [ $# -ne "2" ]
	then
		echo "Usage: wifiGetMacIndexDriver <phy> <index>"
		return 1
	fi

	local phy="$1"
	local idx="$(($2 + 1))"

	head -n $idx /sys/class/ieee80211/${phy}/addresses | tail -n1

	return 0
}

wifiGetMacIndex() {
	# adopted from OpenWrt: /lib/netifd/wireless/mac80211.sh -> mac80211_generate_mac()

	if [ $# -ne "2" ]
	then
		echo "Usage: wifiGetMacIndex <path> <index>"
		return 1
	fi

	local phy=$(ls /sys/devices/$1/ieee80211/ | head -n1)
	local id="$2"

	[ -n "$phy" ] || return 1

	local ref="$(cat /sys/class/ieee80211/${phy}/macaddress)"
	local mask="$(cat /sys/class/ieee80211/${phy}/address_mask)"

	[ "$mask" = "00:00:00:00:00:00" ] && {
		mask="ff:ff:ff:ff:ff:ff";

		[ "$(wc -l < /sys/class/ieee80211/${phy}/addresses)" -gt $id ] && {
			addr="$(wifiGetMacIndexDriver "$phy" "$id")"
			[ -n "$addr" ] && {
				echo "$addr"
				return 0
			}
		}
	}

	local oIFS="$IFS"; IFS=":"; set -- $mask; IFS="$oIFS"

	local mask1=$1
	local mask6=$6

	local oIFS="$IFS"; IFS=":"; set -- $ref; IFS="$oIFS"

	macidx=$(($id + 1))
	[ "$((0x$mask1))" -gt 0 ] && {
		b1="0x$1"
		[ "$id" -gt 0 ] && \
			b1=$(($b1 ^ ((($id - !($b1 & 2)) << 2)) | 0x2))
		printf "%02x:%s:%s:%s:%s:%s" $b1 $2 $3 $4 $5 $6
		return
	}
	[ "$((0x$mask6))" -lt 255 ] && {
		printf "%s:%s:%s:%s:%s:%02x" $1 $2 $3 $4 $5 $(( 0x$6 ^ $id ))
		return
	}
	off2=$(( (0x$6 + $id) / 0x100 ))
	printf "%s:%s:%s:%s:%02x:%02x" \
		$1 $2 $3 $4 \
		$(( (0x$5 + $off2) % 0x100 )) \
		$(( (0x$6 + $id) % 0x100 ))

	return 0
}
# vim: set noexpandtab:tabstop=4