base-files: add minimal mmc support

[openwrt/openwrt.git] / package / base-files / files / lib / functions / system.sh

diff --git a/package/base-files/files/lib/functions/system.sh b/package/base-files/files/lib/functions/system.sh
index c4dc3cc3a9bdd3a9174c400d5b2d5e113de4928c..0ac291201452a01ab1ba4d96188990387f83576e 100644 (file)
--- a/package/base-files/files/lib/functions/system.sh
+++ b/package/base-files/files/lib/functions/system.sh
@@ -1,5 +1,6 @@
 # Copyright (C) 2006-2013 OpenWrt.org
 
+. /lib/functions.sh
 . /usr/share/libubox/jshn.sh
 
 get_mac_binary() {
@@ -134,13 +135,22 @@ mtd_get_part_size() {
        done < /proc/mtd
 }
 
+mmc_get_mac_binary() {
+       local part_name="$1"
+       local offset="$2"
+       local part
+
+       part=$(find_mmc_part "$part_name")
+       get_mac_binary "$part" "$offset"
+}
+
 macaddr_add() {
        local mac=$1
        local val=$2
        local oui=${mac%:*:*:*}
        local nic=${mac#*:*:*:}
 
-       nic=$(printf "%06x" $((0x${nic//:/} + $val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
+       nic=$(printf "%06x" $((0x${nic//:/} + val & 0xffffff)) | sed 's/^\(.\{2\}\)\(.\{2\}\)\(.\{2\}\)/\1:\2:\3/')
        echo $oui:$nic
 }
 
@@ -151,10 +161,38 @@ macaddr_geteui() {
        echo ${mac:9:2}$sep${mac:12:2}$sep${mac:15:2}
 }
 
+macaddr_setbit() {
+       local mac=$1
+       local bit=${2:-0}
+
+       [ $bit -gt 0 -a $bit -le 48 ] || return
+
+       printf "%012x" $(( 0x${mac//:/} | 2**(48-bit) )) | sed -e 's/\(.\{2\}\)/\1:/g' -e 's/:$//'
+}
+
+macaddr_unsetbit() {
+       local mac=$1
+       local bit=${2:-0}
+
+       [ $bit -gt 0 -a $bit -le 48 ] || return
+
+       printf "%012x" $(( 0x${mac//:/} & ~(2**(48-bit)) )) | sed -e 's/\(.\{2\}\)/\1:/g' -e 's/:$//'
+}
+
 macaddr_setbit_la() {
+       macaddr_setbit $1 7
+}
+
+macaddr_unsetbit_mc() {
        local mac=$1
 
-       printf "%02x:%s" $((0x${mac%%:*} | 0x02)) ${mac#*:}
+       printf "%02x:%s" $((0x${mac%%:*} & ~0x01)) ${mac#*:}
+}
+
+macaddr_random() {
+       local randsrc=$(get_mac_binary /dev/urandom 0)
+       
+       echo "$(macaddr_unsetbit_mc "$(macaddr_setbit_la "${randsrc}")")"
 }
 
 macaddr_2bin() {