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author | Darren Hart <dvhart@linux.intel.com> | 2012-01-26 10:39:01 -0800 |
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committer | Darren Hart <dvhart@linux.intel.com> | 2012-02-03 09:25:18 -0800 |
commit | c42364375acb28f0f23867e3a24c9ae25beced37 (patch) | |
tree | 5c5c7d1519d04076f11f89de51e70a1d69acbaa9 | |
parent | 7b1d216a133d3df4597c336e3a6c3c941e69989a (diff) | |
download | meta-intel-c42364375acb28f0f23867e3a24c9ae25beced37.tar.gz meta-intel-c42364375acb28f0f23867e3a24c9ae25beced37.tar.bz2 meta-intel-c42364375acb28f0f23867e3a24c9ae25beced37.zip |
genmac: Replace RANDOM_MAC in network/interfaces with a randomly generated MAC
For machines that do not have a MAC in hardware and with drivers that don't
generate a random one in the kernel, this init script will replace the string
RANDOM_MAC in the network/interfaces file with one generated with "ranpwd -m".
Care is taken to ensure multiple interfaces can use RANDOM_MAC and receive
unique addresses. ranpwd generates MACs with the locally administered bit set
and the multicast bit disabled.
Signed-off-by: Darren Hart <dvhart@linux.intel.com>
Signed-off-by: Joshua Lock <josh@linux.intel.com>
-rw-r--r-- | meta-sys940x/recipes-bsp/genmac/files/genmac | 46 | ||||
-rw-r--r-- | meta-sys940x/recipes-bsp/genmac/genmac.bb | 30 |
2 files changed, 76 insertions, 0 deletions
diff --git a/meta-sys940x/recipes-bsp/genmac/files/genmac b/meta-sys940x/recipes-bsp/genmac/files/genmac new file mode 100644 index 00000000..1899e95f --- /dev/null +++ b/meta-sys940x/recipes-bsp/genmac/files/genmac @@ -0,0 +1,46 @@ +#!/bin/sh +### BEGIN INIT INFO +# Provides: Random MAC address generator +# Required-Start: $syslog +# Required-Stop: $syslog +# Default-Start: 2 3 4 5 +# Default-Stop: 0 1 6 +# Short-Description: Set a random MAC for tagged interfaces +# Description: Set a random MAC for interfaces with RANDOM_MAC +### END INIT INFO + +# Author: Darren Hart <dvhart@linux.intel.com> +# Based on /etc/init.d/skeleton + +PATH=/sbin:/usr/sbin:/bin:/usr/bin +DESC="Set a random MAC for tagged interfaces" +NAME=genmac +RANPWD=`which ranpwd` +SCRIPTNAME=/etc/init.d/$NAME + +# Exit if ranpwd is not installed +[ -x "$RANPWD" ] || exit 0 + +do_start() { + # Replace every occurence of RANDOM_MAC with a unique locally + # administered, unicast, randomly generated MAC address. + while grep -q RANDOM_MAC /etc/network/interfaces; do + sed -i "1,/RANDOM_MAC/s/RANDOM_MAC/$($RANPWD -m)/" /etc/network/interfaces + done +} + +case "$1" in +start) + echo "$NAME: Setting random MAC addresses" + do_start + ;; +stop) + ;; +*) + echo "Usage: $SCRIPTNAME {start|stop}" >&2 + exit 3 + ;; +esac + +exit 0 + diff --git a/meta-sys940x/recipes-bsp/genmac/genmac.bb b/meta-sys940x/recipes-bsp/genmac/genmac.bb new file mode 100644 index 00000000..56849b46 --- /dev/null +++ b/meta-sys940x/recipes-bsp/genmac/genmac.bb @@ -0,0 +1,30 @@ +SUMMARY = "Provide a basic init script to generate a random MAC" +DESCRIPTION = "Set the MAC from the config file." +SECTION = "base" +LICENSE = "MIT" +LIC_FILES_CHKSUM = "file://${COREBASE}/LICENSE;md5=3f40d7994397109285ec7b81fdeb3b58" + +PR = "r0" + +inherit update-rc.d + +RDEPENDS_${PN} = "ranpwd" + +SRC_URI = "file://genmac" + +INITSCRIPT_NAME = "genmac" +# Run as early as possible to ensure we are before the networking scripts +INITSCRIPT_PARAMS = "start 39 S ." + +do_install() { + install -d ${D}${sysconfdir} \ + ${D}${sysconfdir}/init.d + install -m 0755 ${WORKDIR}/${INITSCRIPT_NAME} ${D}${sysconfdir}/init.d + cat ${WORKDIR}/${INITSCRIPT_NAME} | \ + sed -e 's,/etc,${sysconfdir},g' \ + -e 's,/usr/sbin,${sbindir},g' \ + -e 's,/var,${localstatedir},g' \ + -e 's,/usr/bin,${bindir},g' \ + -e 's,/usr,${prefix},g' > ${D}${sysconfdir}/init.d/${INITSCRIPT_NAME} + chmod 755 ${D}${sysconfdir}/init.d/${INITSCRIPT_NAME} +} |