#!/bin/sh

UCIBIN=uci
UCIFUNC=/usr/lib/mac-to-devinfo/devinfo-functions.sh
OVERRIDETABLE=mactodevinfo
DEVDB=macdevdb
UCICONFIG=/etc/config

OUIURL=http://standards.ieee.org/regauth/oui/oui.txt
IABURL=http://standards.ieee.org/regauth/oui/iab.txt

OUIDIR=/var/cache/mac-to-devinfo

OUIFILE=$OUIDIR/oui.txt
IABFILE=$OUIDIR/iab.txt

UCIDEVDB=/usr/share/mac-to-devinfo
UCISTATE="$(mktemp -t)"

. $UCIFUNC

MAC=$1

if [ -z "$MAC" ]; then
	echo "Must specify MAC address"
	exit 1
fi

parse_override() {
	local cfg="$1"
	config_get name "$cfg" name
	config_get maclow "$cfg" maclow
	config_get machigh "$cfg" machigh
	config_get vendor "$cfg" vendor
	config_get devtype "$cfg" devtype
	config_get model "$cfg" model
	config_get ouiowneroverride "$cfg" ouiowner
	LOW=$(echo $maclow | sed -e 's/://g')
	HIGH=$(echo $machigh | sed -e 's/://g')
	if [ -z "$LOW" ] || [ -z "$HIGH" ] || [ -n "$(echo $LOW | grep -E -v '^[0-9A-Fa-f]{12}$')" ] || [ -n "$(echo $HIGH | grep -E -v '^[0-9A-Fa-f]{12}$')" ]; then
	        echo "Invalid mac range for $name: $ouiowneroverride $vendor $devtype $model : $LOW-$HIGH" >&2
		return 1
	fi

	LOWMSB=$(expr substr "$LOW" 1 6)
	LOWLSB=$(expr substr "$LOW" 7 6)
	HIGHMSB=$(expr substr "$HIGH" 1 6)
	HIGHLSB=$(expr substr "$HIGH" 7 6)

	if [ -z "$LOWMSB" ] || [ -z "$LOWLSB" ] || [ -z "$HIGHMSB" ] || [ -z "$HIGHLSB" ]; then
		echo "Error splitting database address strings"
		return 1
	fi

	MACMSB=$(expr substr "$MACNUM" 1 6)
	MACLSB=$(expr substr "$MACNUM" 7 6)

	if [ -z "$MACMSB" ] || [ -z "$MACLSB" ]; then
		echo "Error spliiting mac address string"
		return 1
	fi

	if [ -n "$ouiowneroverride" ]; then
	    OUIOWNER="$ouiowneroverride"
	fi
	if [ $((0x$MACMSB)) -ge $((0x$LOWMSB)) ] && [ $((0x$MACMSB)) -le $((0x$HIGHMSB)) ]; then
		if [ $((0x$MACLSB)) -ge $((0x$LOWLSB)) ] && [ $((0x$MACLSB)) -le $((0x$HIGHLSB)) ]; then
			if [ -n "$OUTSTRING" ]; then	
				echo "ERROR: We already have found information '$OUTSTRING'" >&2
				echo -n "and now we have: " >&2
				echo "$MAC | $OUIOWNER | $vendor | $devtype | $model" >&2
				return 1
			else
				echo "$MAC | $OUIOWNER | $vendor | $devtype | $model"
				return 0
			fi
		fi
	fi
	return 0
}

if [ ! -r "$OUIFILE" ] || [ ! -r "$IABFILE" ]; then
	echo "Missing IEEE Registration Authority Database.  Please run prep-devinfo"
	exit 1
fi	

OUI="$(echo $MAC | cut -f1-3 -d:  | sed -e 's/:/-/g' | tr abcdef ABCDEF )"

OUIOWNER="$(cat $OUIFILE | grep $OUI | tr -s '\t' | cut -f2- -d"$(printf '\t')" )"

if [ -z "$OUIOWNER" ] || [ "$OUIOWNER" = "IEEE REGISTRATION AUTHORITY" ]; then
	if [ -n "$(cat $IABFILE | grep $OUI)" ]; then
		LOWRANGE="$(echo $MAC | cut -f4-6 -d:  | sed -e 's/://g' | tr abcdef ABCDEF )"
		for range in $(cat $IABFILE |grep -E '[0-9A-F]{6}\-[0-9A-F]{6}' |cut -f1 -d"$(printf '\t')"  ); do
			LOW="$(echo $range | cut -f1 -d- )"
			HIGH="$(echo $range | cut -f2 -d- )"
			if [ -z "$LOW" ] || [ -z "$HIGH" ]; then
				echo "Error parsing IAB table"
				exit 1

			fi
			LOWMSB=$(expr substr "$LOW" 1 6)
			LOWLSB=$(expr substr "$LOW" 7 6)
			HIGHMSB=$(expr substr "$HIGH" 1 6)
			HIGHLSB=$(expr substr "$HIGH" 7 6)

			if [ -z "$LOWMSB" ] || [ -z "$LOWLSB" ] || [ -z "$HIGHMSB" ] || [ -z "$HIGHLSB" ]; then
				echo "Error splitting registration authority IAB address strings"
				exit 1
			fi

			MACMSB=$(expr substr "$LOWRANGE" 1 6)
			MACLSB=$(expr substr "$LOWRANGE" 7 6)
			
			if [ -z "$MACMSB" ] || [ -z "$MACLSB" ]; then
				echo "Error splitting mac address string"
				exit 1
			fi
			if [ $((0x$MACMSB)) -ge $((0x$LOWMSB)) ] && [ $((0x$MACMSB)) -le $((0x$HIGHMSB)) ]; then
				if [ $((0x$MACLSB)) -ge $((0x$LOWLSB)) ] && [ $((0x$MACLSB)) -le $((0x$HIGHLSB)) ]; then
					OUIOWNER="$(cat $IABFILE | grep "$LOW-$HIGH" | tr -s '\t' | cut -f3- -d"$(printf '\t')" )"
					break;
				fi
			fi
		done
	fi
fi

if [ -z "$OUIOWNER" ]; then
    OUIOWNER="Unknown Organization"
fi

MACNUM="$(echo $MAC |sed -e 's/://g' | tr ABCDEF abcdef )"

UCI="$UCIBIN -c $UCIDEVDB"
config_load $DEVDB
DEVSTRING=$(config_foreach parse_override mactodevinfo)

SAVEDEVSTRING="$DEVSTRING"

UCI="$UCIBIN -c $UCICONFIG"
config_load $OVERRIDETABLE
DEVSTRING=$(config_foreach parse_override mactodevinfo)

if [ -z "$DEVSTRING" ]; then
    if [ -z "$SAVEDEVSTRING" ]; then
	echo "$MAC | $OUIOWNER | unknown | unknown | unknown"
    else
	echo "$SAVEDEVSTRING"
    fi
else
    echo "$DEVSTRING"
fi

rm -f $UCISTATE