question about netlink/rtnetlink sockets
I'm working on writing some code that talks to the kernel over a netlink socket and manipulates IP addresses, rules, and routes.
I've gotten it working, except for the case of adding an address that is already present. I would like to either ignore or replace it if it is already there (haven't decided which yet) but currently I get an EEXIST error. (Which is understandable, but I'd like to get rid of it.) I tried setting the NLM_F_REPLACE flag (which works when trying to add a route that already exists) but this didn't seem to do anything. Neither did NLM_F_EXCL.
Is this the expected behaviour? Is there some reason why we don't replace it with the newly specified address? If there is no serious reason, could you point me towards the code controlling this? I'm on 2.2.
Thanks,
Chris
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Chris Friesen | MailStop: 043/33/F10 Nortel Networks | work: (613) 765-0557 3500 Carling Avenue | fax: (613) 765-2986 Nepean, ON K2H 8E9 Canada | email: [email protected]