#!/bin/bash
# /usr/sbin/vznetcfg.custom
# a script to bring up bridged network interfaces (veth's) in a VE

GLOBALCONFIGFILE=/etc/vz/vz.conf
VECONFIGFILE=/etc/vz/conf/$VEID.conf
vzctl=/usr/sbin/vzctl
ip=/sbin/ip
. $GLOBALCONFIGFILE
. $VECONFIGFILE

NETIF_OPTIONS=`echo $NETIF | sed 's/,/\n/g'`
for str in $NETIF_OPTIONS; do \
        echo $str
        # getting 'ifname' parameter value
        if [[ "$str" =~ ^ifname= ]]; then
                # remove the parameter name from the string (along with '=')
                VEIFNAME=${str#*=};
        fi
        # getting 'host_ifname' parameter value
        if [[ "$str" =~ ^host_ifname= ]]; then
                # remove the parameter name from the string (along with '=')
                VZHOSTIF=${str#*=};
        fi
done

if [ ! -n "$VETH_IP_ADDRESS" ]; then
   echo "According to $CONFIGFILE VE$VEID has no veth IPs configured."
   exit 1
fi

if [ ! -n "$VZHOSTIF" ]; then
   echo "According to $CONFIGFILE VE$VEID has no veth interface configured."
   exit 1
fi

if [ ! -n "$VEIFNAME" ]; then
   echo "Corrupted $CONFIGFILE: no 'ifname' defined for host_ifname $VZHOSTIF."
   exit 1
fi

for IP in $VETH_IP_ADDRESS; do
   echo "Initializing interface $VZHOSTIF for VE$VEID."
   /sbin/ifconfig $VZHOSTIF 0
done

VEROUTEDEV=$VZHOSTIF

if [ -n "$BRIDGEDEV" ]; then
   echo "Adding interface $VZHOSTIF to the bridge $BRIDGEDEV."
   VEROUTEDEV=$BRIDGEDEV
   /usr/sbin/brctl addif $BRIDGEDEV $VZHOSTIF
fi

# Up the interface $VEIFNAME link in VE$VEID
$vzctl exec $VEID $ip link set $VEIFNAME up

for IP in $VETH_IP_ADDRESS; do
   echo "Adding an IP $IP to the $VEIFNAME for VE$VEID."
   $vzctl exec $VEID $ip address add $IP dev $VEIFNAME

   # removing the netmask
   IP_STRIP=${IP%%/*};

   echo "Adding a route from VE0 to VE$VEID."
   $ip route add $IP_STRIP dev $VEROUTEDEV
done

if [ -n "$VE0_IP" ]; then
   echo "Adding a route from VE$VEID to VE0."
   $vzctl exec $VEID $ip route add $VE0_IP dev $VEIFNAME
fi

if [ -n "$VE_DEFAULT_GATEWAY" ]; then
   echo "Setting $VE_DEFAULT_GATEWAY as a default gateway for VE$VEID."
   $vzctl exec $VEID \
        $ip route add default via $VE_DEFAULT_GATEWAY dev $VEIFNAME
fi

exit 0