ifconfig question

Brooks Davis brooks at one-eyed-alien.net
Fri Oct 1 13:06:01 PDT 2004


On Fri, Oct 01, 2004 at 03:32:34PM -0400, Wesley Shields wrote:
> Per a message about a month ago[1] I recently started some work on
> adding a -v flag to ifconfig.  I've been able to get the index number
> and epoch as those are exposed to userland, but both the dname and dunit
> are in an ifnet struct which AFAIK is not visible.  I initially thought
> you might be able to get them through an ioctl but that is not the case.
> 
> Unless I'm mistaken I'd have to either move the parts I would like to
> see to the if_data struct (which is visible through a sysctl()), or make
> them visible through an ioctl.
> 
> Am I correct in thinking that these are the only way to go about this
> problem, and if so which way is the best way?
> 
> If neither of them are a wanted solution then any suggestions you have
> would be helpful, otherwise I guess I'm just barking up the wrong tree
> here.  :)

A pair of new per-interface sysctls is the right answer.  Those members
are't really intened to be used by public interfaces and if_data can not
grow in -current until at least the 5.4 release and never can grow in
5.x.  An ioctl could work, but a sysctls are a bit cheaper to add.

-- Brooks

-- 
Any statement of the form "X is the one, true Y" is FALSE.
PGP fingerprint 655D 519C 26A7 82E7 2529  9BF0 5D8E 8BE9 F238 1AD4
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 189 bytes
Desc: not available
Url : http://lists.freebsd.org/pipermail/freebsd-net/attachments/20041001/bb12c7d4/attachment.bin


More information about the freebsd-net mailing list