poky/openembedded/packages/netbase/netbase/init

#!/bin/sh

manage network interfaces and configure some networking options

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

if ! [ -x /sbin/ifup ]; then exit 0 fi

spoofprotect_rp_filter () { # This is the best method: turn on Source Address Verification and get # spoof protection on all current and future interfaces.

if [ -e /proc/sys/net/ipv4/conf/all/rp_filter ]; then
    for f in /proc/sys/net/ipv4/conf/*; do
    [ -e $f/rp_filter ] && echo 1 > $f/rp_filter
    done
    return 0
else
    return 1
fi

}

spoofprotect () { echo -n "Setting up IP spoofing protection: " if spoofprotect_rp_filter; then echo "rp_filter." else echo "FAILED." fi }

ip_forward () { if [ -e /proc/sys/net/ipv4/ip_forward ]; then echo -n "Enabling packet forwarding... " echo 1 > /proc/sys/net/ipv4/ip_forward echo "done." fi }

syncookies () { if [ -e /proc/sys/net/ipv4/tcp_syncookies ]; then echo -n "Enabling TCP/IP SYN cookies... " echo 1 > /proc/sys/net/ipv4/tcp_syncookies echo "done." fi }

doopt () { optname=$1 default=$2 opt=grep "^$optname=" /etc/network/options if [ -z "$opt" ]; then opt="$optname=$default" fi optval=${opt#$optname=} if [ "$optval" = "yes" ]; then eval $optname fi }

case "$1" in start) doopt spoofprotect yes doopt syncookies no doopt ip_forward no

    echo -n "Configuring network interfaces... "
    ifup -a
echo "done."
;;
stop)
    if sed -n 's/^[^ ]* \([^ ]*\) \([^ ]*\) .*$/\1 \2/p' /proc/mounts | 
      grep -q "^/ nfs$"; then
        echo "NOT deconfiguring network interfaces: / is an NFS mount"
    elif sed -n 's/^[^ ]* \([^ ]*\) \([^ ]*\) .*$/\1 \2/p' /proc/mounts |  
      grep -q "^/ smbfs$"; then
        echo "NOT deconfiguring network interfaces: / is an SMB mount"
elif sed -n 's/^[^ ]* \([^ ]*\) \([^ ]*\) .*$/\2/p' /proc/mounts | 
      grep -qE '^(nfs|smbfs|ncp|coda)$'; then
        echo "NOT deconfiguring network interfaces: network shares still mounted."
    else
        echo -n "Deconfiguring network interfaces... "
        ifdown -a
    echo "done."
    fi
;;
force-reload|restart)
    echo -n "Reconfiguring network interfaces... "
    ifdown -a
    ifup -a
echo "done."
;;
*)
echo "Usage: /etc/init.d/networking {start|stop|restart|force-reload}"
exit 1
;;

esac

exit 0