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

   1 # Copyright (C) 2006-2013 OpenWrt.org
   2
   3 . /lib/functions.sh
   4 . /usr/share/libubox/jshn.sh
   5
   6 get_mac_binary() {
   7         local path="$1"
   8         local offset="$2"
   9
  10         if ! [ -e "$path" ]; then
  11                 echo "get_mac_binary: file $path not found!" >&2
  12                 return
  13         fi
  14
  15         hexdump -v -n 6 -s $offset -e '5/1 "%02x:" 1/1 "%02x"' $path 2>/dev/null
  16 }
  17
  18 get_mac_label_dt() {
  19         local basepath="/proc/device-tree"
  20         local macdevice="$(cat "$basepath/aliases/label-mac-device" 2>/dev/null)"
  21         local macaddr
  22
  23         [ -n "$macdevice" ] || return
  24
  25         macaddr=$(get_mac_binary "$basepath/$macdevice/mac-address" 0 2>/dev/null)
  26         [ -n "$macaddr" ] || macaddr=$(get_mac_binary "$basepath/$macdevice/local-mac-address" 0 2>/dev/null)
  27
  28         echo $macaddr
  29 }
  30
  31 get_mac_label_json() {
  32         local cfg="/etc/board.json"
  33         local macaddr
  34
  35         [ -s "$cfg" ] || return
  36
  37         json_init
  38         json_load "$(cat $cfg)"
  39         if json_is_a system object; then
  40                 json_select system
  41                         json_get_var macaddr label_macaddr
  42                 json_select ..
  43         fi
  44
  45         echo $macaddr
  46 }
  47
  48 get_mac_label() {
  49         local macaddr=$(get_mac_label_dt)
  50
  51         [ -n "$macaddr" ] || macaddr=$(get_mac_label_json)
  52
  53         echo $macaddr
  54 }
  55
  56 find_mtd_chardev() {
  57         local INDEX=$(find_mtd_index "$1")
  58         local PREFIX=/dev/mtd
  59
  60         [ -d /dev/mtd ] && PREFIX=/dev/mtd/
  61         echo "${INDEX:+$PREFIX$INDEX}"
  62 }
  63
  64 mtd_get_mac_ascii() {
  65         local mtdname="$1"
  66         local key="$2"
  67         local part
  68         local mac_dirty
  69
  70         part=$(find_mtd_part "$mtdname")
  71         if [ -z "$part" ]; then
  72                 echo "mtd_get_mac_ascii: partition $mtdname not found!" >&2
  73                 return
  74         fi
  75
  76         mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
  77
  78         # "canonicalize" mac
  79         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
  80 }
  81
  82 mtd_get_mac_text() {
  83         local mtdname=$1
  84         local offset=$(($2))
  85         local part
  86         local mac_dirty
  87
  88         part=$(find_mtd_part "$mtdname")
  89         if [ -z "$part" ]; then
  90                 echo "mtd_get_mac_text: partition $mtdname not found!" >&2
  91                 return
  92         fi
  93
  94         if [ -z "$offset" ]; then
  95                 echo "mtd_get_mac_text: offset missing!" >&2
  96                 return
  97         fi
  98
  99         mac_dirty=$(dd if="$part" bs=1 skip="$offset" count=17 2>/dev/null)
 100
 101         # "canonicalize" mac
 102         [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
 103 }
 104
 105 mtd_get_mac_binary() {
 106         local mtdname="$1"
 107         local offset="$2"
 108         local part
 109
 110         part=$(find_mtd_part "$mtdname")
 111         get_mac_binary "$part" "$offset"
 112 }
 113
 114 mtd_get_mac_binary_ubi() {
 115         local mtdname="$1"
 116         local offset="$2"
 117
 118         . /lib/upgrade/nand.sh
 119
 120         local ubidev=$(nand_find_ubi $CI_UBIPART)
 121         local part=$(nand_find_volume $ubidev $1)
 122
 123         get_mac_binary "/dev/$part" "$offset"
 124 }
 125
 126 mtd_get_part_size() {
 127         local part_name=$1
 128         local first dev size erasesize name
 129         while read dev size erasesize name; do
 130                 name=${name#'"'}; name=${name%'"'}
 131                 if [ "$name" = "$part_name" ]; then
 132                         echo $((0x$size))
 133                         break
 134                 fi
 135         done < /proc/mtd
 136 }
 137
 138 mmc_get_mac_binary() {
 139         local part_name="$1"
 140         local offset="$2"
 141         local part
 142
 143         part=$(find_mmc_part "$part_name")
 144         get_mac_binary "$part" "$offset"
 145 }
 146
 147 macaddr_add() {
 148         local mac=$1
 149         local val=$2
 150         local oui=${mac%:*:*:*}
 151         local nic=${mac#*:*:*:}
 152
 153         nic=$(printf "%06x" $((0x${nic//:/} + val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
 154         echo $oui:$nic
 155 }
 156
 157 macaddr_geteui() {
 158         local mac=$1
 159         local sep=$2
 160
 161         echo ${mac:9:2}$sep${mac:12:2}$sep${mac:15:2}
 162 }
 163
 164 macaddr_setbit() {
 165         local mac=$1
 166         local bit=${2:-0}
 167
 168         [ $bit -gt 0 -a $bit -le 48 ] || return
 169
 170         printf "%012x" $(( 0x${mac//:/} | 2**(48-bit) )) | sed -e 's/\(.\{2\}\)/\1:/g' -e 's/:$//'
 171 }
 172
 173 macaddr_unsetbit() {
 174         local mac=$1
 175         local bit=${2:-0}
 176
 177         [ $bit -gt 0 -a $bit -le 48 ] || return
 178
 179         printf "%012x" $(( 0x${mac//:/} & ~(2**(48-bit)) )) | sed -e 's/\(.\{2\}\)/\1:/g' -e 's/:$//'
 180 }
 181
 182 macaddr_setbit_la() {
 183         macaddr_setbit $1 7
 184 }
 185
 186 macaddr_unsetbit_mc() {
 187         local mac=$1
 188
 189         printf "%02x:%s" $((0x${mac%%:*} & ~0x01)) ${mac#*:}
 190 }
 191
 192 macaddr_random() {
 193         local randsrc=$(get_mac_binary /dev/urandom 0)
 194
 195         echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${randsrc}")")"
 196 }
 197
 198 macaddr_2bin() {
 199         local mac=$1
 200
 201         echo -ne \\x${mac//:/\\x}
 202 }
 203
 204 macaddr_canonicalize() {
 205         local mac="$1"
 206         local canon=""
 207
 208         mac=$(echo -n $mac | tr -d \")
 209         [ ${#mac} -gt 17 ] && return
 210         [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
 211
 212         for octet in ${mac//[\.:-]/ }; do
 213                 case "${#octet}" in
 214                 1)
 215                         octet="0${octet}"
 216                         ;;
 217                 2)
 218                         ;;
 219                 4)
 220                         octet="${octet:0:2} ${octet:2:2}"
 221                         ;;
 222                 12)
 223                         octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
 224                         ;;
 225                 *)
 226                         return
 227                         ;;
 228                 esac
 229                 canon=${canon}${canon:+ }${octet}
 230         done
 231
 232         [ ${#canon} -ne 17 ] && return
 233
 234         printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
 235 }