rc.d/init.d/network

   1 #!/bin/bash
   2 #
   3 # network       Bring up/down networking
   4 #
   5 # chkconfig: 345 10 97
   6 # description: Activates/Deactivates all network interfaces configured to \
   7 #              start at boot time.
   8 # probe: true
   9
  10 # Source function library.
  11 . /etc/rc.d/init.d/functions
  12
  13 if [ ! -f /etc/sysconfig/network ]; then
  14     exit 0
  15 fi
  16
  17 . /etc/sysconfig/network
  18
  19 if [ -f /etc/sysconfig/pcmcia ]; then
  20         . /etc/sysconfig/pcmcia
  21 fi
  22
  23 if [ -f /etc/sysconfig/network-ip6 ]; then
  24         . /etc/sysconfig/network-ip6
  25 fi
  26
  27 # Check that networking is up.
  28 [ ${NETWORKING} = "no" ] && exit 0
  29
  30 [ -x /sbin/ifconfig ] || exit 0
  31
  32 # Load IPv6 module
  33
  34 if [ ${IP6NETWORKING} = "yes" ]; then
  35         if [ -r /lib/modules/`uname -r`/ipv6/ipv6.o ]; then
  36         /sbin/modprobe net-pf-10
  37         fi
  38 fi
  39
  40 # Even if IPX is configured, without the utilities we can't do much
  41 [ ! -x /usr/bin/ipx_internal_net -o ! -x /usr/bin/ipx_configure ] && IPX=
  42
  43 cd /etc/sysconfig/network-scripts
  44
  45 # find all the interfaces besides loopback.
  46 # ignore aliases, alternative configurations, and editor backup files
  47 interfaces=`ls ifcfg* | egrep -v '(ifcfg-lo|:)' | egrep 'ifcfg-[a-z0-9]+$' | \
  48             sed 's/^ifcfg-//g'`
  49
  50 ipv4_forward_set ()
  51 {
  52         # Turn IP forwarding on or off. We do this before bringing up the
  53         # interfaces to make sure we don't forward when we shouldn't, and
  54         # we do it even if networking isn't configured (why not?).
  55         if [ -d /proc/sys/net/ipv4 ]; then
  56             # people could have left this out of their kernel, which isn't
  57             # exactly an error
  58             if [ ! -f /proc/sys/net/ipv4/ip_forward ] ; then
  59                 echo "/proc/sys/net/ipv4/ip_forward is missing --" \
  60                         "cannot control IP forwarding" >&2
  61             else
  62                 if [ "$FORWARD_IPV4" = "no" -o "$FORWARD_IPV4" = "false" ]; then
  63                     value=0
  64                     message="Disabling IPv4 packet forwarding."
  65                 else
  66                     value=1
  67                     message="Enabling IPv4 packet forwarding."
  68                 fi
  69
  70                 if [ $value != `cat /proc/sys/net/ipv4/ip_forward` ]; then
  71                     show $message
  72                     busy
  73                     echo "$value" > /proc/sys/net/ipv4/ip_forward
  74                     deltext
  75                     ok
  76                 fi
  77             fi
  78         fi
  79 }
  80
  81 ipv4_spoof_protection ()
  82 {
  83 # This is the best method: turn on Source Address Verification and get
  84 # spoof protection on all current and future interfaces.
  85 if [ -e /proc/sys/net/ipv4/conf/all/rp_filter ]; then
  86   show Setting up IP spoofing protection
  87   busy
  88   for f in /proc/sys/net/ipv4/conf/*/rp_filter; do
  89       echo 1 > $f
  90   done
  91   deltext
  92   ok
  93   else
  94   deltext
  95   fail
  96   echo "PROBLEMS SETTING UP IP SPOOFING PROTECTION.  BE WORRIED!"
  97 fi
  98 }
  99
 100 # See how we were called.
 101 case "$1" in
 102   start)
 103         ipv4_forward_set
 104
 105         ./ifup ifcfg-lo
 106
 107         case "$IPX" in
 108           yes|true)
 109             /usr/bin/ipx_configure --auto_primary=$IPXAUTOPRIMARY \
 110                                    --auto_interface=$IPXAUTOFRAME
 111             /usr/bin/ipx_internal_net add $IPXINTERNALNETNUM $IPXINTERNALNODENUM
 112             ;;
 113         esac
 114
 115         for i in $interfaces; do
 116                 ./ifup $i boot
 117         done
 118
 119         ipv4_spoof_protection
 120
 121         touch /var/lock/subsys/network
 122         ;;
 123   stop)
 124         for i in $interfaces; do
 125                 ./ifdown $i boot
 126         done
 127         case "$IPX" in
 128           yes|true)
 129             /usr/bin/ipx_internal_net del
 130             ;;
 131         esac
 132         ./ifdown ifcfg-lo
 133         echo "Disabling IPv4 packet forwarding."
 134         echo 0 > /proc/sys/net/ipv4/ip_forward
 135         rm -f /var/lock/subsys/network
 136         ;;
 137   status)
 138         echo "Configured devices:"
 139         echo lo $interfaces
 140
 141         if [ -x /bin/linuxconf ] ; then
 142                 eval `/bin/linuxconf --hint netdev`
 143                 echo "Devices that are down:"
 144                 echo $DEV_UP
 145                 echo "Devices with modified configuration:"
 146                 echo $DEV_RECONF
 147         else
 148                 echo "Currently active devices:"
 149                 echo `/sbin/ifconfig | grep ^[a-z] | awk '{print $1}'`
 150         fi
 151         ;;
 152   restart)
 153         $0 stop
 154         $0 start
 155         ;;
 156   reload)
 157         if [ -x /bin/linuxconf ] ; then
 158                 eval `/bin/linuxconf --hint netdev`
 159                 if [ "$RECONF_IPV4ROUTING" = "yes" ] ; then
 160                         ipv4_forward_set
 161                 fi
 162                 for device in $DEV_UP ; do
 163                         ./ifup $device
 164                 done
 165                 for device in $DEV_DOWN ; do
 166                         ./ifdown $device
 167                 done
 168                 for device in $DEV_RECONF ; do
 169                         ./ifdown $device
 170                         ./ifup $device
 171                 done
 172                 for device in $DEV_RECONF_ALIASES ; do
 173                         /etc/sysconfig/network-scripts/ifup-aliases $device
 174                 done
 175                 for device in $DEV_RECONF_ROUTES ; do
 176                         /etc/sysconfig/network-scripts/ifup-routes $device
 177                 done
 178                 case $IPX in yes|true)
 179                   case $IPXINTERNALNET in
 180                     reconf)
 181                         /usr/bin/ipx_internal_net del
 182                         /usr/bin/ipx_internal_net add $IPXINTERNALNETNUM \
 183                                                       $IPXINTERNALNODENUM
 184                         ;;
 185                     add)
 186                         /usr/bin/ipx_internal_net add $IPXINTERNALNETNUM \
 187                                                       $IPXINTERNALNODENUM
 188                         ;;
 189                     del)
 190                         /usr/bin/ipx_internal_net del
 191                         ;;
 192                   esac
 193                   ;;
 194                 esac
 195         else
 196                 $0 restart
 197         fi
 198         ;;
 199   probe)
 200         if [ -x /bin/linuxconf ] ; then
 201                 eval `/bin/linuxconf --hint netdev`
 202                 [ -n "$DEV_UP$DEV_DOWN$DEV_RECONF$DEV_RECONF_ALIASES" -o \
 203                   -n "$DEV_RECONF_ROUTES$IPXINTERNALNET" -o \
 204                   "$RECONF_IPV4ROUTING" = yes ] && \
 205                         echo reload
 206                 exit 0
 207         else
 208                 # if linuxconf isn't around to figure stuff out for us,
 209                 # we punt.  Probably better than completely reloading
 210                 # networking if user isn't sure which to do.  If user
 211                 # is sure, they would run restart or reload, not probe.
 212                 exit 0
 213         fi
 214         ;;
 215   *)
 216         echo "Usage: network {start|stop|restart|reload|status|probe}"
 217         exit 1
 218 esac
 219
 220 exit 0