cvs commit: src/sbin/ifconfig ifconfig.c src/sys/net if.c if.h

[Brooks Davis]

On Wed, Sep 01, 2004 at 02:44:45PM -0600, Justin T. Gibbs wrote:
> 
> > brooks      2004-09-01 18:22:14 UTC
> > 
> >   FreeBSD src repository
> > 
> >   Modified files:
> >     sbin/ifconfig        ifconfig.c 
> >     sys/net              if.c if.h 
> >   Log:
> >   Use a spare byte in struct if_data to store the structure size without
> >   increasing it.  Add code to ifconfig to use this size to find the
> >   sockaddr_dl after the struct if_data in the routing message.  This
> >   allows struct if_data to grow (up to 255 bytes) without breaking
> >   ifconfig.
> 
> You could squeeze out 256 bytes if you treat 0 as meaning 256 - just like
> the SCSI protocol.

Unfortunaly, we're using 0 as the magic, not-set variable.  My intent is to
add some better hurristics for the 0 case if we do end up keeping this
hack.  Long term, we probably need to rev the routing message API to fix
this kind of junk, but that's a massive undertaking.

-- Brooks

-- 
Any statement of the form "X is the one, true Y" is FALSE.
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