IP_RECVTOS

[Michael Tuexen]

On Jun 6, 2012, at 7:17 PM, Adrian Chadd wrote:

> Hi,
> 
> For TCP, I've seen the network layer change things (eg setting bits on
> incoming traffic to mark which interface it came in on), so you can't
> guarantee the outbound ToS == inbound ToS.
I've not said that inbound == outbound... I just wanted to make clear
that there is a socket option of setting the TOS byte for outgoing
traffic. The TCP stack might overwrite the ECN bits...

I need the IP_RECVTOS functionality for implementing a transport stack supporting
ECN in userland, actually running the SCTP kernel sources (with some glue code)
in userland on top of UDP...

Best regards
Michael
> 
> 
> 
> Adrian
>