[ovs-dev] [PATCH] tests: Add check for correct l3l4 conntrack frag reassembly

Gregory Rose gvrose8192 at gmail.com
Thu Oct 3 16:32:25 UTC 2019

On 10/3/2019 6:08 AM, Ben Pfaff wrote:
> On Thu, Oct 03, 2019 at 08:35:42AM -0700, Greg Rose wrote:
>> Two commits recently fixed an issue with setting the corrrect l3 and l4
>> flow information when conntrack reassembles packet fragments.
>> c98f776 datapath: Clear the L4 portion of the key for "later" fragments
>> 2609173 datapath: Properly set L4 keys on "later" IP fragments
>> This test checks for regressions that might break this feature.  It
>> counts on the fact that when the bug is present the udp src port
>> will not be correct.  It will either be zero or else some other
>> garbage value.  So the test feeds some fragments through for
>> reassembly and then checks to make sure that the udp srce port
>> is actually the correct value of 5001.
>> Tested by reverting the above commits and observing that the test
>> then fails.
>> Signed-off-by: Greg Rose <gvrose8192 at gmail.com>
> This patch doesn't apply, with:
>      error: corrupt patch at line 43
> I think that it's probably because this has very long lines.  Email
> doesn't do well with lines over about 1000 bytes long.  I know of two
> ways to avoid the problem: use pull requests instead of email, or
> shorten the lines, e.g. by splicing with \ or dnl.  The latter might be
> a little better because it means that patches that later update or
> correct the tests will pass through email OK.
> Will you try one of these?

Hmm, yes.  git send-email complained about that.  OK, let me try 
reformatting the patch so it works
better with email.

- Greg

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