if_nameindex with 2.2 kernel

[Ulrich Drepper]

On Wed, 2002-07-24 at 12:21, Roland McGrath wrote:
> What is the reason for preferring AF_UNIX over AF_INET at all?

AF_UNIX is always available.  While using AF_INET might cause a module
to be loaded.  Unlikely but there were cases.  Some people really have
machines with only other network protocols.

> An AF_UNIX
> socket can do SIOCGIFCONF but none of the other SIOCGIF* calls that are
> needed for e.g. getifaddrs or the existing _res_hconf_reorder_addrs
> (SIOCGIFNETMASK)--you must use an AF_INET socket for those to work.

You are taling about a normal setup as we know it.  But there are really
other people with strange environments.

> So in
> my tree I have made it try AF_INET first unconditionally, so my getifaddrs
> implementation can work (and I noticed along the way that the reorder
> option in /etc/host.conf can't possibly be working without that change).

Why the latter?  And maybe the __opensock interface needs to be revised.

-- 
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Ulrich Drepper  \    ,-------------------'   \  Sunnyvale, CA 94089 USA
Red Hat          `--' drepper at redhat.com   `------------------------
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