#!/bin/bash
# vim: set ts=8 sw=2 sts=2 et sta fileencoding=utf-8:

# Define a VLAN interface in network interfaces file.
# Usage:
# iface foo inet <static|manual|dhcp|...>
#     vlan-master <interface>
#     vlan-id <N>
#     ...
#
# Optional:
#     vlan-protocol <802.1Q|802.1ad>
#     vlan-loose-binding <on|off>
#     vlan-gvrp <on|off>
#     vlan-mvrp <on|off>
#     vlan-ingress-qos-map FROM:TO FROM:TO...
#     vlan-egress-qos-map FROM:TO FROM:TO...

# No assumptions are made about the vlan-id or master from the interface name.
# You need to specify both vlan-id and vlan-master.

[[ -z "${IF_VLAN_ID}" ]] && exit 0
[[ -z "${IF_VLAN_MASTER}" ]] && exit 0

run() {
  [[ "${VERBOSITY}" -ge 1 ]] && echo "$@"
  "$@"
}

case "${MODE}" in
  start)
    ip link add link "${IF_VLAN_MASTER}" name "${IFACE}" \
      type vlan id "${IF_VLAN_ID}" \
      ${IF_VLAN_PROTOCOL:+protocol ${IF_VLAN_PROTOCOL}} \
      ${IF_VLAN_LOOSE_BINDING:+loose_binding ${IF_VLAN_LOOSE_BINDING}} \
      ${IF_VLAN_GVRP:+gvrp ${GVRP}} \
      ${IF_VLAN_MVRP:+mvrp ${MVRP}} \
      ${IF_VLAN_INGRESS_QOS_MAP:+ingress-qos-map "${IF_VLAN_INGRESS_QOS_MAP}"} \
      ${IF_VLAN_EGRESS_QOS_MAP:+egress-qos-map "${IF_VLAN_EGRESS_QOS_MAP}"}
    ;;
  stop)
    ip link delete "${IFACE}"
    ;;
  *) echo 'Invalid mode:' "${MODE:-none}" >&2; exit 1 ;;
esac