Hello.

In article [ref] (at Wed, 16 Jul 2003 04:21:33 +0400 (MSD)), kuznet@ms2.inr.ac.ru says:

Select yourself: either IFA_IFFLAGS or translated flags in ifa_flags.
I prefer the second way just because it is too unpleasant to add
a new attribute for sake of two bits with no visible candidates
to use remaining ones.

Well, I dislike ifa_flags because 
 - it is conceptually wrong to combine them.
   e.g. even if all autoconf addresses expired, flags lasts and 
   we should report it to userspace.
 - ifa_flags is extremely expensive resource.
   There are only 8 bits. Use it only for addresses.

My suggestion is:
 - create L3 per-interface RTM, say, RTM_xxxIFACE.
 - provide inet_device / inet6_dev things via this RTM.
    e.g. per-interface statistics, flags etc.

-- 
Hideaki YOSHIFUJI @ USAGI Project [off-list ref]
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