Hi all,

I'm trying to modify source to hide certain interfaces and routes from the
vty shell. Namely any interface containing "eth" and a specific route.

I'm not trying to remove these from netlink, I just don't want them to
appear in vtysh.

I've achieved the former by modifying netlink_interface() in
zebra/rt_netlink.c to perform a string comparison test against ifp->name
which is working perfectly.

I'm now on to the latter in which I'm trying to hide a specific route which
can be achieved by preventing zebra from learning about any routes with the
gateway X.X.X.X for example.

I imagine the relevant code is hiding within netlink_routing_table() in
zebra/rt_netlink.c though I can't seem to see what type gate is and how to
match against it with an IPv4 address (or even if it's the right var).

Any pointers would be greatly appreciated.

Thanks!
Alex Turner
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