mirror of
https://gitlab.freedesktop.org/NetworkManager/NetworkManager
synced 2024-07-21 10:14:41 +00:00
117 lines
3.6 KiB
Bash
Executable file
117 lines
3.6 KiB
Bash
Executable file
#!/bin/sh
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# NetworkManager device handler for geneve interfaces.
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#
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# Put this script in "/etc/NetworkManager/dispatcher.d/device" and
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# create a generic connection with:
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#
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# nmcli connection add type generic \
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# con-name geneve1 \
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# ifname geneve1 \
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# generic.device-handler geneve \
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# connection.autoconnect no
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#
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# Then add the following parameters at the bottom of file
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# /etc/NetworkManager/system-connections/geneve1 , and do a "nmcli
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# connection reload".
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#
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# [user]
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# geneve.remote=172.25.14.15
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# geneve.vni=5555
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# geneve.dstport=6082
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#
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# Now, when activating connection "geneve1", NetworkManager calls this
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# script to create the device according to parameters in the user
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# settings, and then performs IP configuration on it.
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#
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# This script will use the following properties from the [user] setting:
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#
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# - geneve.remote (required)
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# - geneve.vni (required)
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# - geneve.ttl
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# - geneve.dstport
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#
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# See the GENEVE section of "man ip-link" for more details.
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ifname=$1
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action=$2
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require()
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{
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if ! command -v "$1" > /dev/null ; then
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echo "ERROR='$1' is not installed"
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exit 1
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fi
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}
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get_iplink_param()
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{
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ip -j -d link show "$1" | jq -r .[0].linkinfo.info_data."$2"
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}
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require jq
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if [ "$action" = device-add ]; then
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# Create the interface here and then write a line to stdout
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# containing "IFINDEX=" followed by the ifindex of the interface
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# just created, so that NetworkManager can manage it and configure
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# IPs on the interface. The name of the returned ifindex must be
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# the same as "$ifname".
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vni=$CONNECTION_USER_GENEVE__VNI
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remote=$CONNECTION_USER_GENEVE__REMOTE
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ttl=$CONNECTION_USER_GENEVE__TTL
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dstport=$CONNECTION_USER_GENEVE__DSTPORT
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if [ -z "$vni" ] || [ -z "$remote" ]; then
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echo "ERROR=Missing VNI or remote"
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exit 2
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fi
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if [ -d /sys/class/net/"$ifname" ]; then
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# If the interface already exists, reuse it after checking
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# that the parameters are compatible.
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# NOTE: it's not strictly necessary to handle an already
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# existing interface, but if the script doesn't, it won't be
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# possible to re-activate the connection when it's up.
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if [ "$vni" != "$(get_iplink_param "$ifname" id)" ]; then
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echo "ERROR=The link already exists with different VNI"
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exit 3
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fi
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if [ "$remote" != "$(get_iplink_param "$ifname" remote)" ]; then
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echo "ERROR=The link already exists with different remote"
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exit 3
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fi
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if [ -n "$ttl" ] && [ "$ttl" != "$(get_iplink_param "$ifname" ttl)" ]; then
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echo "ERROR=The link already exists with different TTL"
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exit 3
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fi
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if [ -n "$dstport" ] && [ "$dstport" != "$(get_iplink_param "$ifname" port)" ]; then
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echo "ERROR=The link already exists with different dstport"
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exit 3
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fi
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echo IFINDEX="$(cat /sys/class/net/"$ifname"/ifindex)"
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exit 0
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fi
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# The interface doesn't exist, create it
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if ! err=$(ip link add "$ifname" type geneve vni "$vni" remote "$remote" \
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${tos:+tos "$tos"} \
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${ttl:+ttl "$ttl"} \
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${dstport:+dstport "$dstport"} 2>&1); then
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echo "ERROR=Failed creating the interface: $err"
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exit 4
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fi
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echo IFINDEX="$(cat /sys/class/net/"$ifname"/ifindex)"
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exit 0
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elif [ "$action" = device-delete ]; then
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# NM automatically deletes the link on deactivation,
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# it's not necessary to do it here. The "device-delete"
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# action can be used to perform additional operations.
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exit 0
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fi
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exit 5
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