#!/bin/sh

set_ether_mac() {
	# Most devices have a standard "VCTL" partition
	CONFIG_PARTITION="$(grep "VCTL" /proc/mtd | cut -d: -f1)"
	if [ ! -z $CONFIG_PARTITION ] ; then
		MAC1="$(strings /dev/$CONFIG_PARTITION |grep MAC|cut -d: -f2|cut -c3-14|sed -e 's,\(..\),:\1,g' -e 's,^:,,')"
		MAC2="$(strings /dev/$CONFIG_PARTITION |grep MAC|cut -d: -f8|cut -c3-14|sed -e 's,\(..\),:\1,g' -e 's,^:,,')"

		ifconfig eth0 hw ether $MAC1 2>/dev/null
		ifconfig eth1 hw ether $MAC2 2>/dev/null
		return 0
	fi

	# The DNS-313 has a special field in its RedBoot
	# binary that we need to check
	CONFIG_PARTITION="$(grep "RedBoot" /proc/mtd | cut -d: -f1)"
	if [ ! -z $CONFIG_PARTITION ] ; then
		DEVID="$(dd if=/dev/mtdblock0 bs=1 skip=119508 count=7 2>/dev/null)"
		if [ "x$DEVID" = "xdns-313" ] ; then
			MAC1="$(dd if=/dev/mtdblock0 bs=1 skip=119540 count=6 2>/dev/null | hexdump -n6 -e '/1 ":%02X"' | sed s/^://g)"
			ifconfig eth0 hw ether $MAC1 2>/dev/null
			return 0
		fi
	fi
}

boot_hook_add preinit_main set_ether_mac