Formatting

  ip a flush eth0

  ip a flush ${VM_NET_TAP}

  _DhcpIP=$( dhclient -v ${VM_NET_TAP} 2>&1 | grep ^bound | cut -d' ' -f3 )

  [[ "${_DhcpIP}" == [0-9.]* ]] \

  && echo "Info: Retrieved IP ${_DhcpIP} via DHCP" \

  || ( echo "ERROR: Cannot retrieve IP from DHCP using MAC ${VM_NET_MAC}" && exit 16 )

  DHCP_IP=$( dhclient -v ${VM_NET_TAP} 2>&1 | grep ^bound | cut -d' ' -f3 )

  if [[ "${DHCP_IP}" == [0-9.]* ]]; then

    echo "Info: Retrieved IP ${DHCP_IP} via DHCP"

  else

    echo "ERROR: Cannot retrieve IP from DHCP using MAC ${VM_NET_MAC}" && exit 16

  fi

  ip a flush ${VM_NET_TAP}

  _tmpTapPath="/dev/tap$(</sys/class/net/${VM_NET_TAP}/ifindex)"

  TAP_PATH="/dev/tap$(</sys/class/net/${VM_NET_TAP}/ifindex)"

  # create dev file (there is no udev in container: need to be done manually)

  IFS=: read MAJOR MINOR < <(cat /sys/class/net/${VM_NET_TAP}/macvtap/${_tmpTapPath##*/}/uevent)

  IFS=: read MAJOR MINOR < <(cat /sys/class/net/${VM_NET_TAP}/macvtap/${TAP_PATH##*/}/uevent)

  [[ "x${MAJOR}" != "x" ]] \

	  && echo "Info: Please make sure that the following docker setting is used: --device-cgroup-rule='c ${MAJOR}:* rwm'" \

      	  || ( echo "Info: Macvtap creation issue: Cannot find: /sys/class/net/${VM_NET_TAP}/" && exit 18 )

  if [[ "x${MAJOR}" != "x" ]]; then

    echo "Info: Please make sure that the following docker setting is used: --device-cgroup-rule='c ${MAJOR}:* rwm'"

  else

     echo "Info: Macvtap creation issue: Cannot find: /sys/class/net/${VM_NET_TAP}/" && exit 18

  fi

  [[ ! -e ${_tmpTapPath} ]] && [[ -e /dev0/${_tmpTapPath##*/} ]] && ln -s /dev0/${_tmpTapPath##*/} ${_tmpTapPath}

  [[ ! -e ${TAP_PATH} ]] && [[ -e /dev0/${TAP_PATH##*/} ]] && ln -s /dev0/${TAP_PATH##*/} ${TAP_PATH}

  if [[ ! -e ${_tmpTapPath} ]]; then

    mknod ${_tmpTapPath} c $MAJOR $MINOR && : || ("ERROR: Cannot mknod: ${_tmpTapPath}" && exit 20)

  if [[ ! -e ${TAP_PATH} ]]; then

    mknod ${TAP_PATH} c $MAJOR $MINOR && : || ("ERROR: Cannot mknod: ${TAP_PATH}" && exit 20)

  fi

  exec 30>>$_tmpTapPath

  exec 30>>$TAP_PATH

  exec 40>>/dev/vhost-net

  NET_OPTS="-netdev tap,id=hostnet0,vhost=on,vhostfd=40,fd=30"