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Implementing a daemon that listens for netlink messages in Python was discussed
for many years. This is a proof-of-concept implementation how we can listen for
netlink messages and process them in Python.
Python 3.10 minimum is required due to the use of case statements which mimics
C-style switch/case instructions.
Add example:
set interfaces ethernet eth1 vif 21 address dhcp
set interfaces ethernet eth1 vif 21 address dhcpv6
commit
If network cable is unplugged:
vyos-netlinkd[12681]: RTM_NEWLINK -> eth3.10, state=DOWN, mac=00:50:56:b3:9d:8e
vyos-netlinkd[12681]: Stopping dhclient@eth3.10.service...
vyos-netlinkd[12681]: Stopping dhcp6c@eth3.10.service...
If cable is plugged back in:
vyos-netlinkd[12681]: RTM_NEWLINK -> eth3.10, state=DOWN, mac=00:50:56:b3:9d:8e
vyos-netlinkd[12681]: RTM_NEWLINK -> eth3.10, state=UP, mac=00:50:56:b3:9d:8e
vyos-netlinkd[12681]: Restarting dhclient@eth3.10.service...
vyos-netlinkd[12681]: Restarting dhcp6c@eth3.10.service...
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