dfee452713
Add a function to get a mac stored as text from flash. The octets of the mac address need to be separated by any separator supported by macaddr_canonicalize(). Signed-off-by: Dmitry Tunin <hanipouspilot@gmail.com> Signed-off-by: Mathias Kresin <dev@kresin.me>
155 lines
2.9 KiB
Bash
155 lines
2.9 KiB
Bash
# Copyright (C) 2006-2013 OpenWrt.org
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get_mac_binary() {
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local path="$1"
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local offset="$2"
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if [ -z "$path" ]; then
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echo "get_mac_binary: file $path not found!" >&2
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return
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fi
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hexdump -v -n 6 -s $offset -e '5/1 "%02x:" 1/1 "%02x"' $path 2>/dev/null
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}
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find_mtd_chardev() {
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local INDEX=$(find_mtd_index "$1")
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local PREFIX=/dev/mtd
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[ -d /dev/mtd ] && PREFIX=/dev/mtd/
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echo "${INDEX:+$PREFIX$INDEX}"
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}
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mtd_get_mac_ascii() {
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local mtdname="$1"
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local key="$2"
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local part
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local mac_dirty
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part=$(find_mtd_part "$mtdname")
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if [ -z "$part" ]; then
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echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
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return
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fi
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mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
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# "canonicalize" mac
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[ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
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}
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mtd_get_mac_text() {
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local mtdname=$1
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local offset=$2
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local part
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local mac_dirty
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part=$(find_mtd_part "$mtdname")
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if [ -z "$part" ]; then
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echo "mtd_get_mac_text: partition $mtdname not found!" >&2
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return
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fi
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if [ -z "$offset" ]; then
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echo "mtd_get_mac_text: offset missing!" >&2
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return
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fi
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mac_dirty=$(dd if="$part" bs=1 skip="$offset" count=17 2>/dev/null)
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# "canonicalize" mac
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[ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
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}
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mtd_get_mac_binary() {
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local mtdname="$1"
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local offset="$2"
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local part
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part=$(find_mtd_part "$mtdname")
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get_mac_binary "$part" "$offset"
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}
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mtd_get_mac_binary_ubi() {
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local mtdname="$1"
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local offset="$2"
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. /lib/upgrade/nand.sh
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local ubidev=$(nand_find_ubi $CI_UBIPART)
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local part=$(nand_find_volume $ubidev $1)
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if [ -z "$part" ]; then
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echo "mtd_get_mac_binary: ubi volume $mtdname not found!" >&2
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return
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fi
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hexdump -v -n 6 -s $offset -e '5/1 "%02x:" 1/1 "%02x"' /dev/$part 2>/dev/null
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}
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mtd_get_part_size() {
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local part_name=$1
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local first dev size erasesize name
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while read dev size erasesize name; do
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name=${name#'"'}; name=${name%'"'}
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if [ "$name" = "$part_name" ]; then
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echo $((0x$size))
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break
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fi
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done < /proc/mtd
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}
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macaddr_add() {
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local mac=$1
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local val=$2
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local oui=${mac%:*:*:*}
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local nic=${mac#*:*:*:}
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nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
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echo $oui:$nic
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}
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macaddr_setbit_la() {
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local mac=$1
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printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
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}
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macaddr_2bin() {
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local mac=$1
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echo -ne \\x${mac//:/\\x}
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}
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macaddr_canonicalize() {
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local mac="$1"
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local canon=""
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mac=$(echo -n $mac | tr -d \")
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[ ${#mac} -gt 17 ] && return
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[ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
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for octet in ${mac//[\.:-]/ }; do
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case "${#octet}" in
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1)
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octet="0${octet}"
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;;
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2)
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;;
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4)
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octet="${octet:0:2} ${octet:2:2}"
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;;
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12)
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octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
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;;
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*)
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return
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;;
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esac
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canon=${canon}${canon:+ }${octet}
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done
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[ ${#canon} -ne 17 ] && return
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printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
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}
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