Re: where does ifconfig get ppp0 inet addr?

[Aaron Hall <lisps@vitaphone.net>]

On Fri, 6 Jan 2006, Hugo Vanwoerkom wrote:

> Joachim Fahnenmüller wrote:
> > Hi Hugo,
> >
> > On Fri, Jan 06, 2006 at 12:44:34PM -0600, Hugo Vanwoerkom wrote:
> > > Hi,
> > >
> > > Debian's search tool is down.
> > >
> > > Anybody know where ifconfig gets the inet addr?
> > >
> > > ...
> > > ppp0      Link encap:Point-to-Point Protocol
> > >           inet addr:200.57.201.194  P-t-P:200.57.219.18 
> > > Mask:255.255.255.255
> > > ...
> >
> > What sort of interface is it, and how do you bring it up? E. G. if it is a 
> > modem
> > connection to an ISP, the IP address is probably given by the ISP
> > Regards
>
> I did not phrase that question correctly.
> I mean, where in the /proc or /sym directories is the IP address stored.
> From someplace there ifconfig gets it.
> Indeed initially it is provided by the ISP.

A (very) quick look at the ifconfig source in net-tools suggests that it
calls glibc for the information. In particular, it looks like it depends
on interfaces in /usr/include/net and /usr/include/netinet, among other
places.

- Aaron

--
Aaron Hall           :    I do quarrel with logic that says, "Stupid people
ahall@vitaphone.net  :    are associated with X, therefore X is stupid."
                     :    Stupid people are associated with everything.
                     :                                       -- Larry Wall