Kernel can drop routes, addresses and neighbors without notification via netlink. So we update information in our structures as follows:
- when a link is removed all associated routes, addresses and neighbors are removed too
- when a link is disabled all associated routes and neighbors are removed
- when an address on a link is removed all routes and neighbors from this network are removed
All routes, neighbors and addresses always belong to some link, so a new class LinkInfo was created and it holds all information related to a single link. This makes finding information related to a specific link much easier.
Differential Revision: https://phabricator.services.mozilla.com/D48360
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extra : moz-landing-system : lando
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