package/base-files/files/lib/functions/system.sh

   1 # Copyright (C) 2006-2013 OpenWrt.org
   2
   3 find_mtd_index() {
   4         local PART="$(grep "\"$1\"" /proc/mtd | awk -F: '{print $1}')"
   5         local INDEX="${PART##mtd}"
   6
   7         echo ${INDEX}
   8 }
   9
  10 find_mtd_chardev() {
  11         local INDEX=$(find_mtd_index "$1")
  12         local PREFIX=/dev/mtd
  13
  14         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
  15         echo "${INDEX:+$PREFIX$INDEX}"
  16 }
  17
  18 mtd_get_mac_ascii()
  19 {
  20         local mtdname="$1"
  21         local key="$2"
  22         local part
  23         local mac_dirty
  24
  25         part=$(find_mtd_part "$mtdname")
  26         if [ -z "$part" ]; then
  27                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
  28                 return
  29         fi
  30
  31         mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
  32
  33         # "canonicalize" mac
  34         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
  35 }
  36
  37 mtd_get_mac_binary() {
  38         local mtdname="$1"
  39         local offset="$2"
  40         local part
  41
  42         part=$(find_mtd_part "$mtdname")
  43         if [ -z "$part" ]; then
  44                 echo "mtd_get_mac_binary: partition $mtdname not found!" >&2
  45                 return
  46         fi
  47
  48         dd bs=1 skip=$offset count=6 if=$part 2>/dev/null | hexdump -v -n 6 -e '5/1 "%02x:" 1/1 "%02x"'
  49 }
  50
  51 mtd_get_part_size() {
  52         local part_name=$1
  53         local first dev size erasesize name
  54         while read dev size erasesize name; do
  55                 name=${name#'"'}; name=${name%'"'}
  56                 if [ "$name" = "$part_name" ]; then
  57                         echo $((0x$size))
  58                         break
  59                 fi
  60         done < /proc/mtd
  61 }
  62
  63 macaddr_add() {
  64         local mac=$1
  65         local val=$2
  66         local oui=${mac%:*:*:*}
  67         local nic=${mac#*:*:*:}
  68
  69         nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
  70         echo $oui:$nic
  71 }
  72
  73 macaddr_setbit_la()
  74 {
  75         local mac=$1
  76
  77         printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
  78 }
  79
  80 macaddr_2bin()
  81 {
  82         local mac=$1
  83
  84         echo -ne \\x${mac//:/\\x}
  85 }
  86
  87 macaddr_canonicalize()
  88 {
  89         local mac="$1"
  90         local canon=""
  91
  92         [ ${#mac} -gt 17 ] && return
  93         [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
  94
  95         for octet in ${mac//[\.:-]/ }; do
  96                 case "${#octet}" in
  97                 1)
  98                         octet="0${octet}"
  99                         ;;
 100                 2)
 101                         ;;
 102                 4)
 103                         octet="${octet:0:2} ${octet:2:2}"
 104                         ;;
 105                 12)
 106                         octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
 107                         ;;
 108                 *)
 109                         return
 110                         ;;
 111                 esac
 112                 canon=${canon}${canon:+ }${octet}
 113         done
 114
 115         [ ${#canon} -ne 17 ] && return
 116
 117         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
 118 }