network service shell

network_service.sh

#! /bin/bash
#
# network       Bring up/down networking
#
# chkconfig: 2345 10 90
# description: Activates/Deactivates all network interfaces configured to \
#              start at boot time.
#
### BEGIN INIT INFO
# Provides: $network
# Should-Start: iptables ip6tables NetworkManager-wait-online NetworkManager
# Short-Description: Bring up/down networking
# Description: Bring up/down networking
### END INIT INFO

# Source function library.
. /etc/init.d/functions

if [ ! -f /etc/sysconfig/network ]; then
    exit 6
fi

. /etc/sysconfig/network

if [ -f /etc/sysconfig/pcmcia ]; then
	. /etc/sysconfig/pcmcia
fi


# Check that networking is up.
[ "${NETWORKING}" = "no" ] && exit 6

# if the ip configuration utility isn't around we can't function.
[ -x /sbin/ip ] || exit 1


CWD=$(pwd)
cd /etc/sysconfig/network-scripts

. ./network-functions

# find all the interfaces besides loopback.
# ignore aliases, alternative configurations, and editor backup files
interfaces=$(ls ifcfg-* | \
	    LC_ALL=C sed -e "$__sed_discard_ignored_files" \
		       -e '/\(ifcfg-lo$\|:\|ifcfg-.*-range\)/d' \
		       -e '{ s/^ifcfg-//g;s/[0-9]/ &/}' | \
	    LC_ALL=C sort -k 1,1 -k 2n | \
	    LC_ALL=C sed 's/ //')
rc=0

# See how we were called.
case "$1" in
  start)
	[ "$EUID" != "0" ] && exit 4
	rc=0
	# IPv6 hook (pre IPv4 start)
	if [ -x /etc/sysconfig/network-scripts/init.ipv6-global ]; then
		/etc/sysconfig/network-scripts/init.ipv6-global start pre
	fi
  
	apply_sysctl

	#tell NM to reload its configuration
	if [ "$(LANG=C nmcli -t --fields running general status 2>/dev/null)" = "running" ]; then
		nmcli connection reload
	fi

	# bring up loopback interface
	action $"Bringing up loopback interface: " ./ifup ifcfg-lo

	case "$VLAN" in
	  yes)
	    if [ ! -d /proc/net/vlan ] && ! modprobe 8021q >/dev/null 2>&1 ; then
		net_log $"No 802.1Q VLAN support available in kernel."
	    fi
	    ;;
	esac

	vlaninterfaces=""
	vpninterfaces=""
	xdslinterfaces=""
	bridgeinterfaces=""

	# bring up all other interfaces configured to come up at boot time
	for i in $interfaces; do
		unset DEVICE TYPE SLAVE
		eval $(LANG=C grep -F "DEVICE=" ifcfg-$i)
		eval $(LANG=C grep -F "TYPE=" ifcfg-$i)
		eval $(LANG=C grep -F "SLAVE=" ifcfg-$i)
		eval $(LANG=C grep -F "NM_CONTROLLED=" ifcfg-$i)

		if [ -z "$DEVICE" ] ; then DEVICE="$i"; fi

                if [ "$SLAVE" = "yes" ] && ( ! is_nm_running || is_false $NM_CONTROLLED ) ; then
			continue
		fi

		if [ "${DEVICE##cipcb}" != "$DEVICE" ] ; then
			vpninterfaces="$vpninterfaces $i"
			continue
		fi
		if [ "$TYPE" = "xDSL" ]; then
		        xdslinterfaces="$xdslinterfaces $i"
			continue
		fi

		if [ "$TYPE" = "Bridge" ]; then
		        bridgeinterfaces="$bridgeinterfaces $i"
			continue
		fi
		if [ "$TYPE" = "IPSEC" ]; then
			vpninterfaces="$vpninterfaces $i"
			continue
		fi

		if [ "${DEVICE%%.*}" != "$DEVICE"  -o  "${DEVICE##vlan}" != "$DEVICE" ] ; then
			vlaninterfaces="$vlaninterfaces $i"
			continue
		fi
		
		if LANG=C grep -EL "^ONBOOT=['\"]?[Nn][Oo]['\"]?" ifcfg-$i > /dev/null ; then
		        # this loads the module, to preserve ordering
			is_available $i
			continue
		fi
		action $"Bringing up interface $i: " ./ifup $i boot
		[ $? -ne 0 ] && rc=1
	done
	
	# Bring up xDSL and VPN interfaces
	for i in $vlaninterfaces $bridgeinterfaces $xdslinterfaces $vpninterfaces ; do
            if ! LANG=C grep -EL "^ONBOOT=['\"]?[Nn][Oo]['\"]?" ifcfg-$i >/dev/null 2>&1 ; then
		action $"Bringing up interface $i: " ./ifup $i boot
		[ $? -ne 0 ] && rc=1
	    fi
        done

	# Add non interface-specific static-routes.
	if [ -f /etc/sysconfig/static-routes ]; then
	   if [ -x /sbin/route ]; then
	       grep "^any" /etc/sysconfig/static-routes | while read ignore args ; do
                   /sbin/route add -$args
	       done
	   else
	       net_log $"Legacy static-route support not available: /sbin/route not found"
	   fi
	fi    

 	# IPv6 hook (post IPv4 start)
 	if [ -x /etc/sysconfig/network-scripts/init.ipv6-global ]; then
 		/etc/sysconfig/network-scripts/init.ipv6-global start post
 	fi
	# Run this again to catch any interface-specific actions
	apply_sysctl
 
        touch /var/lock/subsys/network

	[ -n "${NETWORKDELAY}" ] && /bin/sleep ${NETWORKDELAY}
        ;;
  stop)
	[ "$EUID" != "0" ] && exit 4
  	# Don't shut the network down if root is on NFS or a network
	# block device.
        rootfs=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/" && $3 != "rootfs") { print $3; }}' /proc/mounts)
        rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' /etc/mtab)
	
	if [[ "$rootfs" == nfs* || "$rootopts" =~ _r?netdev ]] ; then
		exit 1
	fi

        systemctl show --property=RequiredBy -- -.mount | grep -q 'remote-fs.target' && exit 1
  
	vlaninterfaces=""
	vpninterfaces=""
	xdslinterfaces=""
	bridgeinterfaces=""
	remaining=""
	rc=0

	# get list of bonding, vpn, and xdsl interfaces
	for i in $interfaces; do
		unset DEVICE TYPE
		eval $(LANG=C grep -F "DEVICE=" ifcfg-$i)
		eval $(LANG=C grep -F "TYPE=" ifcfg-$i)

		if [ -z "$DEVICE" ] ; then DEVICE="$i"; fi

		if [ "${DEVICE##cipcb}" != "$DEVICE" ] ; then
			vpninterfaces="$vpninterfaces $i"
			continue
		fi
		if [ "$TYPE" = "IPSEC" ]; then
			vpninterfaces="$vpninterfaces $i"
			continue
		fi
		if [ "$TYPE" = "Bridge" ]; then
		        bridgeinterfaces="$bridgeinterfaces $i"
		        continue
		fi
		if [ "$TYPE" = "xDSL" ]; then
		        xdslinterfaces="$xdslinterfaces $i"
			continue
		fi

		if [ "${DEVICE%%.*}" != "$DEVICE"  -o  "${DEVICE##vlan}" != "$DEVICE" ] ; then
			vlaninterfaces="$vlaninterfaces $i"
			continue
		fi
		remaining="$remaining $i"
	done
	
	for i in $vpninterfaces $xdslinterfaces $bridgeinterfaces $vlaninterfaces $remaining; do
		unset DEVICE TYPE
		(. ./ifcfg-$i
		if [ -z "$DEVICE" ] ; then DEVICE="$i"; fi

		if ! check_device_down $DEVICE; then
		   action $"Shutting down interface $i: " ./ifdown $i boot
		   [ $? -ne 0 ] && rc=1
		fi
		)
	done

	action $"Shutting down loopback interface: " ./ifdown ifcfg-lo

	sysctl -w net.ipv4.ip_forward=0 > /dev/null 2>&1

	# IPv6 hook (post IPv4 stop)
	if [ -x /etc/sysconfig/network-scripts/init.ipv6-global ]; then
		/etc/sysconfig/network-scripts/init.ipv6-global stop post
	fi
	
        rm -f /var/lock/subsys/network
        ;;
  status)
	echo $"Configured devices:"
	echo lo $interfaces

	echo $"Currently active devices:"
	echo $(/sbin/ip -o link show up | awk -F ": " '{ print $2 }')
	;;
  restart|reload|force-reload)
        cd "$CWD"
	$0 stop
	$0 start
	rc=$?
	;;
  *)
        echo $"Usage: $0 {start|stop|status|restart|reload|force-reload}"
        exit 2
esac

exit $rc