Re: TCPMSS clamp-mss-to-pmtu breaks packets that have no MSS set (incl. solution)

[Daniel Gibson <metalcaedes@gmail.com>]

Nepenthes Development Team schrieb:
> Hi,
> 
> On Mon, Aug 2, 2010 at 5:16 PM, Jan Engelhardt <jengelh@medozas.de> wrote:
>> If a packet has no MSS option, none will be added no more.
>> (commit v2.6.34-rc1~233^2~154^2~44)
> 
> git log -1 -p v2.6.34-rc1~233^2~154^2~44
> 
> I found some changes to prevent setting an MSS if the SYN packet has a
> payload already, and to prevent it from increasing the MSS, but
> nothing to prevent if from setting the MSS if there was no MSS set
> before.
> 
> The code to add an MSS option if none exists still exists,
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=blob;f=net/netfilter/xt_TCPMSS.c;h=62ec021fbd50ddd278da5f9f53756587d83fb786;hb=HEAD#l116
> 
> 
> Markus
> --

Hi,

any news on this?

- Daniel