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