ifupdown-ng/executor-scripts/linux/vxlan
Maximilian Wilhelm 3f67b2137d Add VXLAN support
Add a vxlan exectutor as well as mappings from ifupdown2 parameters to ours.

  Closes #75

Signed-off-by: Maximilian Wilhelm <max@sdn.clinic>
2020-10-02 02:20:10 +02:00

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#!/bin/sh
#
# This executor is responsible for setting up the Virtual Extensible LAN (VXLA) overlay interfaces.
#
# Fri, 02 Oct 2020 01:10:29 +0200
# -- Maximilian Wilhelm <max@sdn.clinic>
#
# Known options for the main interface are:
#
# IF_VXLAN_ID The VXLAN Network Identifier (VNI)
# IF_VXLAN_PHYSDEV Specifies the physical device to use for tunnel endpoint communication
# IF_VXLAN_LOCAL_IP Specifies the source IP address to use in outgoing packets
# IF_VXLAN_REMOTE_IP IP of the remote VTEP endpoint (for ptp mode)
# IF_VXLAN_REMOTE_GROUP Multicast group to use for this VNI (for ptmp mode)
# IF_VXLAN_LEARNING Wether to activate MAC learning on this instance (on/off)
# IF_VXLAN_AGEING Specifies the lifetime in seconds of FDB entries learnt by the kernel
# IF_VXLAN_DSTPORT UDP destination port to communicate to the remote VXLAN tunnel endpoint (default 4789)
#
set -e
[ -n "$VERBOSE" ] && set -x
# No VNI, nuthin' to do for us
if [ ! "${IF_VXLAN_ID}" ]; then
exit 0
fi
case "$PHASE" in
depend)
if [ "${IF_VXLAN_PHYSDEV}" ]; then
echo "${IF_VXLAN_PHYSDEV}"
fi
;;
create)
if [ -d "/sys/class/net/${IFACE}" ]; then
iface_type=$(ip -d link show dev "${IFACE}" | head -n3 | tail -n1 | awk '{ print $1 }')
if [ "${iface_type}" != 'dummy' ]; then
echo "Interface ${IFACE} exists but is of type ${iface_type} instead of dummy"
exit 1
fi
exit 0
fi
# Input validation
if [ "${IF_VXLAN_REMOTE_IP}" -a "${IF_VXLAN_REMOTE_GROUP}" ]; then
echo "Error on ${IFACE} (vxlan): Only one of 'remote' and 'group' can be given!" >&2
exit 1
fi
# Gather arguments
ARGS=""
[ "${IF_VXLAN_PHYSDEV}" ] && ARGS="${ARGS} dev ${IF_VXLAN_PHYSDEV}"
[ "${IF_VXLAN_LOCAL_IP}" ] && ARGS="${ARGS} local ${IF_VXLAN_LOCAL_IP}"
[ "${IF_VXLAN_REMOTE_IP}" ] && ARGS="${ARGS} remote ${IF_VXLAN_REMOTE_IP}"
[ "${IF_VXLAN_REMOTE_GROUP}" ] && ARGS="${ARGS} group ${IF_VXLAN_REMOTE_GROUP}"
[ "${IF_VXLAN_AGEING}" ] && ARGS="${ARGS} ageing ${IF_VXLAN_AGEING}"
# Linux uses non-standard default port - WTF?
if [ "${IF_VXLAN_DSTPORT}" ]; then
ARGS="${ARGS} dstport ${IF_VXLAN_DSTPORT}"
else
ARGS="${ARGS} dstport 4789"
fi
case "${IF_VXLAN_LEARNING}" in
on|yes)
ARGS="${ARGS} learning"
;;
off|no)
ARGS="${ARGS} nolearning"
;;
esac
${MOCK} ip link add "${IFACE}" type vxlan id "${IF_VXLAN_ID}" ${ARGS}
;;
destroy)
if [ -z "${MOCK}" -a ! -d "/sys/class/net/${IFACE}" ]; then
exit 0
fi
${MOCK} ip link del "${IFACE}"
;;
esac