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# Copyright (C) 2019 Robert Marko <robimarko@gmail.com>
# Copyright (C) 2019 Roger Pueyo Centelles <roger.pueyo@guifi.net>
#
# Helper function to extract MAC addresses and calibration data for MikroTik
#
mikrotik_caldata_extract() {
local part=$1
local offset=$(($2))
local count=$(($3))
local mtd
local erdfile="/tmp/erd.bin"
local fwfile="/lib/firmware/${FIRMWARE}"
[ -e $fwfile ] && exit 0
mtd=$(find_mtd_chardev $part)
[ -n "$mtd" ] || caldata_die "no mtd device found for partition $part"
rbextract -e $mtd $erdfile
dd if=$erdfile of=$fwfile iflag=skip_bytes bs=$count skip=$offset count=1 2>/dev/null || \
caldata_die "failed to extract calibration data from $mtd"
rm -f $erdfile
}
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