pre 2.6.14 ip_queue - packet shrink issues?

pre 2.6.14 ip_queue - packet shrink issues?

[Scott MacKay]

With ip_queue, under the older libipq style interface
I seem to be having a problem resizing a mangled
message smaller under 2.6.  It seems like the contents
could be changed, but the receiver got the original
packet size, like the trim failed or something.  Still
need to check the details in ethereal, but from anyone
using ip_queue or noting improvements in the new
style, does an issue like this ring any bells?  Thanks
in advance!

-Scott


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Re: pre 2.6.14 ip_queue - packet shrink issues?

[Eric Leblond]

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Hello,

On Friday, 2008 March 28 at  6:07:47 -0700, Scott MacKay wrote:
> With ip_queue, under the older libipq style interface
> I seem to be having a problem resizing a mangled
> message smaller under 2.6.  It seems like the contents
> could be changed, but the receiver got the original
> packet size, like the trim failed or something.  Still
> need to check the details in ethereal, but from anyone
> using ip_queue or noting improvements in the new
> style, does an issue like this ring any bells?  Thanks
> in advance!

I think remember such an issue. It has been fixed and should work with
up-to-date code (I mean with libnetfilter_queue).

BR,
-- 
Eric Leblond
INL: http://www.inl.fr/
NuFW: http://www.nufw.org/

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Re: pre 2.6.14 ip_queue - packet shrink issues?

[Scott MacKay]

--- Eric Leblond <eric@inl.fr> wrote:

> Hello,
> 
> On Friday, 2008 March 28 at  6:07:47 -0700, Scott
> MacKay wrote:
> > With ip_queue, under the older libipq style
> interface
> > I seem to be having a problem resizing a mangled
> > message smaller under 2.6.  It seems like the
> contents
> > could be changed, but the receiver got the
> original
> > packet size, like the trim failed or something. 
> Still
> > need to check the details in ethereal, but from
> anyone
> > using ip_queue or noting improvements in the new
> > style, does an issue like this ring any bells? 
> Thanks
> > in advance!
> 
> I think remember such an issue. It has been fixed
> and should work with
> up-to-date code (I mean with libnetfilter_queue).
> 
> BR,
> -- 
> Eric Leblond
> INL: http://www.inl.fr/
> NuFW: http://www.nufw.org/
> 
Aah...so possibly no fix in the older style?  The new
design seems easy enough to port to, I was just hoping
on not hopping too many revisions from the kernel rev
I have in (RHEL 4.5) if possible.  I was glad a minor
UG within the up2date cleared my huge issue (panic
when returning a payload thru libipq) but this of
course is just as bad...I had a hope to keep in the
RHEL available kernel distros but understand if this
was rolled in outside of what is convenient.

-Scott


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