Colors in log

configureDHCP() {

  VM_NET_VLAN="${VM_NET_TAP}_vlan"

  GATEWAY=$(ip r | grep default | awk '{print $3}')

  NETWORK=$(ip -o route | grep "${VM_NET_DEV}" | grep -v default | awk '{print $1}')

  IP=$(ip address show dev "${VM_NET_DEV}" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)

  [[ "${DEBUG}" == [Yy1]* ]] && set -x

  # Create a macvlan network to allow for communication between the host and the VM guest

  { ip link add link "${VM_NET_DEV}" "${VM_NET_VLAN}" type macvlan mode bridge ; rc=$?; } || :

  if (( rc != 0 )); then

    echo "ERROR: Cannot create macvlan interface. Please make sure the network type is 'macvlan' and not 'ipvlan',"

    echo "ERROR: and that the NET_ADMIN capability has been added to the container config: --cap-add NET_ADMIN" && exit 15

  fi

  ip address add "${IP}" dev "${VM_NET_VLAN}"

  ip link set dev "${VM_NET_VLAN}" up

  ip route flush dev "${VM_NET_VLAN}"

  ip route del "${NETWORK}" dev "${VM_NET_DEV}"

  ip route add "${NETWORK}" dev "${VM_NET_VLAN}" metric 0

  # Create a macvtap network for the VM guest

  { ip link add link "${VM_NET_DEV}" name "${VM_NET_TAP}" address "${VM_NET_MAC}" type macvtap mode bridge ; rc=$?; } || :

  if (( rc != 0 )); then

    echo "ERROR: Capability NET_ADMIN has not been set most likely. Please add the "

    echo "ERROR: following docker setting to your container: --cap-add NET_ADMIN" && exit 16

    error "Cannot create macvtap interface. Please make sure the network type is 'macvlan' and not 'ipvlan',"

    error "and that the NET_ADMIN capability has been added to the container config: --cap-add NET_ADMIN" && exit 16

  fi

  ip link set "${VM_NET_TAP}" up

  { set +x; } 2>/dev/null

  TAP_NR=$(</sys/class/net/"${VM_NET_TAP}"/ifindex)

  TAP_PATH="/dev/tap${TAP_NR}"

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

  IFS=: read -r MAJOR MINOR < <(cat /sys/devices/virtual/net/"${VM_NET_TAP}"/tap*/dev)

  if (( MAJOR < 1)); then

     echo "ERROR: Cannot find: sys/devices/virtual/net/${VM_NET_TAP}" && exit 18

  fi

  (( MAJOR < 1)) && error "Cannot find: sys/devices/virtual/net/${VM_NET_TAP}" && exit 18

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

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

    { mknod "${TAP_PATH}" c "$MAJOR" "$MINOR" ; rc=$?; } || :

    (( rc != 0 )) && echo "ERROR: Cannot mknod: ${TAP_PATH} ($rc)" && exit 20

    (( rc != 0 )) && error "Cannot mknod: ${TAP_PATH} ($rc)" && exit 20

  fi

  { exec 30>>"$TAP_PATH"; rc=$?; } || :

  if (( rc != 0 )); then

    echo "ERROR: Cannot create TAP interface ($rc). Please add the following docker settings to your "

    echo "ERROR: container: --device-cgroup-rule='c ${MAJOR}:* rwm' --device=/dev/vhost-net" && exit 21

    error "Cannot create TAP interface ($rc). Please add the following docker settings to your "

    error "container: --device-cgroup-rule='c ${MAJOR}:* rwm' --device=/dev/vhost-net" && exit 21

  fi

  { exec 40>>/dev/vhost-net; rc=$?; } || :

  if (( rc != 0 )); then

    echo "ERROR: VHOST can not be found ($rc). Please add the following "

    echo "ERROR: docker setting to your container: --device=/dev/vhost-net" && exit 22

    error "VHOST can not be found ($rc). Please add the following "

    error "docker setting to your container: --device=/dev/vhost-net" && exit 22

  fi

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

configureNAT () {

  # Create a bridge with a static IP for the VM guest

  VM_NET_IP='20.20.20.21'

  [[ "${DEBUG}" == [Yy1]* ]] && set -x

  # Create bridge with static IP for the VM guest

  { ip link add dev dockerbridge type bridge ; rc=$?; } || :

  if (( rc != 0 )); then

    echo "ERROR: Capability NET_ADMIN has not been set most likely. Please add the "

    echo "ERROR: following docker setting to your container: --cap-add NET_ADMIN" && exit 23

    error "Capability NET_ADMIN has not been set most likely. Please add the "

    error "following docker setting to your container: --cap-add NET_ADMIN" && exit 23

  fi

  ip address add ${VM_NET_IP%.*}.1/24 broadcast ${VM_NET_IP%.*}.255 dev dockerbridge

  if [[ $(< /proc/sys/net/ipv4/ip_forward) -eq 0 ]]; then

    { sysctl -w net.ipv4.ip_forward=1 ; rc=$?; } || :

    if (( rc != 0 )); then

      echo "ERROR: Please add the following docker setting to your container: --sysctl net.ipv4.ip_forward=1" && exit 24

      error "Please add the following docker setting to your container: --sysctl net.ipv4.ip_forward=1" && exit 24

    fi

  fi

  $DNSMASQ ${DNSMASQ_OPTS:+ $DNSMASQ_OPTS}

  { set +x; } 2>/dev/null

  [[ "${DEBUG}" == [Yy1]* ]] && echo

}

# ######################################

  chmod 666 /dev/net/tun

fi

[ ! -c /dev/net/tun ] && echo "ERROR: TUN network interface not available..." && exit 85

[ ! -c /dev/net/tun ] && error "TUN network interface not available..." && exit 85

# Create the necessary file structure for /dev/vhost-net

if [ ! -c /dev/vhost-net ]; then

if [[ "${DEBUG}" == [Yy1]* ]]; then

  IP=$(ip address show dev "${VM_NET_DEV}" | grep inet | awk '/inet / { print $2 }' | cut -f1 -d/)

  echo "INFO: Container IP is ${IP} with gateway ${GATEWAY}" && echo

  info "Container IP is ${IP} with gateway ${GATEWAY}" && echo

fi

if [[ "${DHCP}" == [Yy1]* ]]; then

  if [[ "$GATEWAY" == "172."* ]]; then

    echo -n "ERROR: You cannot enable DHCP while the container is "

    echo "in a bridge network, only on a macvlan network!" && exit 86

    error "You cannot enable DHCP while the container is "

    error "in a bridge network, only on a macvlan network!" && exit 86

  fi

  # Configuration for DHCP IP

NET_OPTS="${NET_OPTS} -device virtio-net-pci,romfile=,netdev=hostnet0,mac=${VM_NET_MAC},id=net0"

[[ "${DEBUG}" == [Yy1]* ]] && echo && echo "Finished network setup.." && echo

return 0