source: bootscripts-embedded/clfs/rc.d/init.d/bcm47xx-switch@ 73ee2a6

#!/bin/ash
#
# Broadcom 47xx vlan and switch configuration init script
#
# Config: uses the 'nvram' settings for setting up vlan devices

. /etc/rc.d/init.d/functions

if [ ! -x /sbin/robocfg ]; then
        echo -n "Setting up vlan: /sbin/robocfg not found "
        false
        check_status
fi

if [ ! -x /sbin/vconfig ]; then
        echo -n "Setting up vlan: /sbin/vconfig not found "
        false
        check_status
fi

if [ ! -x /sbin/nvram ]; then
        echo -n "Setting up vlan: /sbin/nvram not found "
        false
        check_status
fi

case "$1" in
start)

        # Add a specific workaround for the case of weirdly set wireless mac address
        # Do what openwrt is doing, and increment the last hex with 2
        if [ "`nvram get il0macaddr`" = 00:90:4c:5f:00:2a ]; then
                et0="$(nvram get et0macaddr)"
                prefix="$(echo $et0 | sed -e 's/:..$//')"
                addendum=$(( (0x$(echo $et0 | sed -e s/.*://g) + 2) % 256 ))
                il0=$(printf %s:%02x $prefix $addendum)
                echo -n "Fixing up wlan0 mac address: "
                nvram set il0macaddr=$il0 && nvram commit
                check_status
                ifconfig wlan0 hw ether $il0 2>/dev/null
        fi

        # eth0 has to be up for this
        ifconfig eth0 up

        robocfg switch disable
        robocfg vlans enable reset

        nvram show | grep vlan[0-4]ports= | sed -e s/vlan// -e s/ports=/\ / |
          while read vlan ports; do
                echo -n "Bringing up eth0.${vlan}: "
                robocfg vlan ${vlan} ports "${ports}" &&
                vconfig add eth0 $vlan
                check_status
        done
        robocfg switch enable
        exit 0
        ;;
stop)
        # FIXME: Should we really do something at shutdown?
        exit 0
        ;;
restart)
        $0 stop
        $0 start
        ;;
status)
        robocfg show
        ;;
*)
        echo "Usage: $0 {start|stop|restart|status}"
        exit 1
esac