Re: Incoming TCP TOS: A simple question, I would have thought...

From: David Luyer (david_luyer@pacific.net.au)
Date: Wed Mar 07 2001 - 00:05:45 EST

> getsockopt(fd, SOL_IP, IP_TOS, ..

Doesn't work. Returns the TOS of outgoing packets, which defaults to 0 even if
there is a TOS set on incoming traffic... that was what I tried in my first
test program.

David.

> cheers,
>
> lincoln.
>
> At 03:00 PM 7/03/2001 +1100, David Luyer wrote:
>
> >I've scrolled through various code in net/ipv4, and I can't see how to query
> >the TOS of an incoming TCP stream (or at the least, the TOS of the SYN which
> >initiated the connection).
> >
> >Someone has sent in a feature request for squid which would require this,
> >presumably so they can set the TOS in their routers and have the squid caches
> >honour the TOS to select performance (via delay pools, multiple parents,
> >different outgoing IP or similar). However I can't see how to get the TOS for
> >a TCP socket out of the kernel short of having an open raw socket watching for
> >SYNs and looking at the TOS on them.
> >
> >Any pointers?
> >
> >David. 

-- 
David Luyer                                        Phone:   +61 3 9674 7525
Engineering Projects Manager   P A C I F I C       Fax:     +61 3 9699 8693
Pacific Internet (Australia)  I N T E R N E T      Mobile:  +61 4 1111 2983
http://www.pacific.net.au/                         NASDAQ:  PCNTF

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

This archive was generated by hypermail 2b29 : Wed Mar 07 2001 - 21:00:21 EST