# Copyright 2016 Tim Niemeyer
# License GPLv3

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

	> /etc/config/wireless

	return 0
}

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

	grep 'config wifi-iface' /etc/config/wireless | sed -n -e "s/.*'\([^']*\)'.*/\1/p" | while read -r line ; do
		uci -q delete "wireless.$line"
	done
	uci -q commit wireless

	return 0
}

wifiAddPhy() {
	if [ $# -ne "2" ]
	then
		echo "Usage: wifiAddPhy <phy> <channel>"
		return 1
	fi

	local phy=$1
	local channel=$2
	local radio="radio$(echo "$phy" | tr -d -C "0-9")"
	local hwmode="11g"
	if [ "$channel" = "auto5" ] ; then
		hwmode="11a"
		channel="auto"
	elif ( ! [ "$channel" = "auto" ] ) && [ "$channel" -gt "14" ]; then
		hwmode="11a"
	fi

	uci batch <<-__EOF__
		set wireless.${radio}='wifi-device'
		set wireless.${radio}.type='mac80211'
		set wireless.${radio}.channel='${channel}'
		set wireless.${radio}.phy='${phy}'
		set wireless.${radio}.hwmode='${hwmode}'
		set wireless.${radio}.htmode='HT20'
		set wireless.${radio}.country='DE'
	__EOF__
	if [ "$hwmode" = "11g" ]; then
		uci batch <<-__EOF__
			set wireless.${radio}.supported_rates='6000 9000 12000 18000 24000 36000 48000 54000'
			set wireless.${radio}.basic_rate='6000 9000 18000 36000 54000'
		__EOF__
	fi
	uci commit wireless

	echo "${radio}"
	return 0
}

wifiAddPhyCond() {
	if [ $# -ne "3" ]
	then
		return 1
	fi

	local phy=$1
	local freq=$2
	local channel=$3
	local radio=""

	if iw phy "$phy" info | grep -q -m1 "${freq}... MHz"; then
		radio="$(wifiAddPhy "$phy" "$channel")"
		if [ -z "$radio" ]; then
			return 1
		fi
	fi
	
	echo "$radio"
	return 0 # also returns success if outermost if is false
}

wifiAddAdHocMesh() {
	if [ $# -ne "3" ]
	then
		echo "Usage: wifiAddAdHocMesh <radio> <essid> <bssid>"
		return 1
	fi

	local radio=$1
	local essid=$2
	local bssid=$3

	local channel=$(uci get "wireless.${radio}.channel")
	local iface="w2ibss"
	if [ "$channel" -gt "14" ]; then
		iface="w5ibss"
	fi

	uci batch <<-__EOF__
		set wireless.${iface}='wifi-iface'
		set wireless.${iface}.device='${radio}'
		set wireless.${iface}.network='${iface}'
		set wireless.${iface}.ifname='${iface}'
		set wireless.${iface}.mode='adhoc'
		set wireless.${iface}.bssid='${bssid}'
		set wireless.${iface}.ssid='${essid}'
		set wireless.${iface}.mcast_rate='6000'
		set wireless.${iface}.encryption='none'
		commit wireless

		set network.${iface}='interface'
		set network.${iface}.mtu='1528'
		set network.${iface}.proto='batadv'
		set network.${iface}.mesh='bat0'
		commit network
	__EOF__

	echo "${iface}"
	return 0
}

wifiAddAP() {
	if [ $# -ne "5" ]
	then
		echo "Usage: wifiAddAP <radio> <essid> <network> <iface> <hidden>"
		return 1
	fi

	local radio=$1
	local essid=$2
	local network=$3
	local inface=$4
	local hidden=$5

	local channel=$(uci get "wireless.${radio}.channel")
	local iface="w2${inface}"
	if [ "$channel" -gt "14" ]; then
		iface="w5${inface}"
	fi
	uci batch <<-__EOF__
		set wireless.${iface}='wifi-iface'
		set wireless.${iface}.device='${radio}'
		set wireless.${iface}.network='${network}'
		set wireless.${iface}.ifname='${iface}'
		set wireless.${iface}.mode='ap'
		set wireless.${iface}.ssid='${essid}'
		set wireless.${iface}.encryption='none'
		set wireless.${iface}.hidden='${hidden}'

		commit wireless
	__EOF__

	echo "${iface}"
	return 0
}

wifiAddSta() {
	if [ $# -ne "4" ]
	then
		echo "Usage: wifiAddSta <radio> <essid> <network> <iface>"
		return 1
	fi

	local radio=$1
	local essid=$2
	local network=$3
	local iface=$4

	uci batch <<-__EOF__
		set wireless.${iface}='wifi-iface'
		set wireless.${iface}.device='${radio}'
		set wireless.${iface}.network='${network}'
		set wireless.${iface}.ifname='${iface}'
		set wireless.${iface}.mode='sta'
		set wireless.${iface}.ssid='${essid}'

		commit wireless
	__EOF__
	
	echo "${iface}"
	return 0
}

wifiAddMesh() {
	if [ $# -ne "2" ]
	then
		echo "Usage: wifiAddMesh <radio> <mesh-id>"
		return 1
	fi

	local radio=$1
	local mesh_id=$2

	local channel=$(uci get "wireless.${radio}.channel")
	local iface="w2mesh"
	if [ "$channel" -gt "14" ]; then
		iface="w5mesh"
	fi
	uci batch <<-__EOF__
		set wireless.${iface}='wifi-iface'
		set wireless.${iface}.device='${radio}'
		set wireless.${iface}.network='${iface}'
		set wireless.${iface}.ifname='${iface}'
		set wireless.${iface}.mode='mesh'
		set wireless.${iface}.mesh_id='${mesh_id}'
		set wireless.${iface}.encryption='none'
		set wireless.${iface}.mesh_fwding=0
		commit wireless

		set network.${iface}='interface'
		set network.${iface}.mtu='1528'
		set network.${iface}.proto='batadv'
		set network.${iface}.mesh='bat0'
		commit network
	__EOF__

	echo "${iface}"
	return 0
}
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