How would one get the master device of a network device they have an index of? I have looked into rtnetlink, but would prefer a simpler and more concise solution
Linux C get network interface's master interface
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Given the interface name you can read the value of
/sys/class/net/<interface>/master. For example, on my system I have container with interfaceveth3c732e7. To find the associated bridge:We can confirm that information with the
ip linkcommand:If you want to know how to do this without using
/sys, theiptool itself is open source. The relevant functions appear to be here and here; it involves sending a netlink message and then receiving and parsing the response.