TCP options order changed in FreeBSD 7, incompatible with some routers

[Bjoern A. Zeeb]

On Wed, 12 Mar 2008, Mike Silbersack wrote:

>
> On Wed, 12 Mar 2008, Bjoern A. Zeeb wrote:
>
>> On Tue, 11 Mar 2008, d.s. al coda wrote:
>> 
>>> - FreeBSD 7 has <mss 1412, sackOK, eol> (there is of course an aligning 
>>> nop
>>> after the eol, which tcpdump skips)
>> 
>> Which is a bug (the nop after the EOL) that I recently fixed in HEAD.
>> I am still curious to know if it's only ordering or the invalid padding
>> or both that keeps clients from connecting. The problem is getting
>> hands on such a problematic "client".
>
> Bjoern, can you get that fix MFC'd ASAP?

I'll do that the next hours.


> I've e-mailed a tcpdump developer asking how we can enhance it so that it 
> prints out <..., eol, nop> so that we can detect such errors more easily in 
> the future.
>
> I wish I had paid more attention to that part of the previous thread on this 
> topic!
>
> -Mike
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-- 
Bjoern A. Zeeb                                 bzeeb at Zabbadoz dot NeT
Software is harder than hardware  so better get it right the first time.