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

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