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authorGabor Juhos <juhosg@openwrt.org>2013-11-14 17:44:42 +0000
committerGabor Juhos <juhosg@openwrt.org>2013-11-14 17:44:42 +0000
commitb7914344adb14c70348498a2196e96bb79dd52ca (patch)
tree3d74694b871607136b05e532f4203fe6dd6f42c1 /package/base-files/files/lib/functions.sh
parent4a977252f5a3b885695835540838dae0696c6208 (diff)
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base-files: add macaddr_canonicalize helper function
In commit r38690, the MAC address canonicalization has been converted to use 'tr' instead of 'printf'. This only works if with MAC addresses which uses the 'xx:xx:xx:xx:xx:xx' format. However on some boards, the MAC addresses are stored in different format in the mtd partition. Some vendors are using hyphens or dots as separators instead of colons. Also the leading zeroes may be missing from the individual octets or those are replaced with spaces. Add a new function which can be used to convert these into the 'xx:xx:xx:xx:xx:xx' format. Also update the 'mtd_get_mac_ascii' function to use the new helper. The helper function is based on this code: http://isquared.nl/blog/2010/08/11/Bash-function-to-canonicalize-MAC-addresses/ Signed-off-by: Gabor Juhos <juhosg@openwrt.org> SVN-Revision: 38803
Diffstat (limited to 'package/base-files/files/lib/functions.sh')
-rwxr-xr-xpackage/base-files/files/lib/functions.sh35
1 files changed, 34 insertions, 1 deletions
diff --git a/package/base-files/files/lib/functions.sh b/package/base-files/files/lib/functions.sh
index 6cb6df92fd..85ebc2aeb1 100755
--- a/package/base-files/files/lib/functions.sh
+++ b/package/base-files/files/lib/functions.sh
@@ -257,7 +257,7 @@ mtd_get_mac_ascii()
mac_dirty=$(strings "$part" | sed -n 's/^'"$key"'=//p')
# "canonicalize" mac
- [ -n "$mac_dirty" ] && echo ${mac_dirty} | tr [A-F] [a-f]
+ [ -n "$mac_dirty" ] && macaddr_canonicalize "$mac_dirty"
}
mtd_get_mac_binary() {
@@ -310,6 +310,39 @@ macaddr_2bin()
echo -ne \\x${mac//:/\\x}
}
+macaddr_canonicalize()
+{
+ local mac="$1"
+ local canon=""
+
+ [ ${#mac} -gt 17 ] && return
+ [ -n "${mac//[a-fA-F0-9\.: -]/}" ] && return
+
+ for octet in ${mac//[\.:-]/ }; do
+ case "${#octet}" in
+ 1)
+ octet="0${octet}"
+ ;;
+ 2)
+ ;;
+ 4)
+ octet="${octet:0:2} ${octet:2:2}"
+ ;;
+ 12)
+ octet="${octet:0:2} ${octet:2:2} ${octet:4:2} ${octet:6:2} ${octet:8:2} ${octet:10:2}"
+ ;;
+ *)
+ return
+ ;;
+ esac
+ canon=${canon}${canon:+ }${octet}
+ done
+
+ [ ${#canon} -ne 17 ] && return
+
+ printf "%02x:%02x:%02x:%02x:%02x:%02x" 0x${canon// / 0x} 2>/dev/null
+}
+
strtok() { # <string> { <variable> [<separator>] ... }
local tmp
local val="$1"