[LARTC] Prioritizing based on HTTP Content-Type header

[Alexandre J. Correa - Onda Internet]

You can use STRING + CONSAVE modules !!

mark packets...

because string match only "starter packet" ... the others packets from 
the same connection isn´t marked.. consave can track this..

-j CONNMARK --restore-mark
-m string --string 'string' --algo bm -j MARK --set-mark 1
-m string --string 'string2' --algo bm -j MARK --set-mark 2
-m mark --mark 1 -j CONNMARK --save-mark
-m mark --mark 2 -j CONNMARK --save-mark


Michael Alger wrote:
> I'm setting up a reverse-proxy on a limited-bandwidth pipe. The
> system is Debian "etch" on Linux 2.6, using squid as the proxy.
>
> As we've only got 5mbit to play with, what I'd really like to do is
> set up priority levels based on the Content-Type of the (outgoing)
> response:
>
>   1. text/* gets highest priority (along with
>      application/x-javascript).
>   2. image/* gets middle priority.
>   3. */* gets lowest priority.
>
> Today I tried just using tc, with netfilter's "string" match module
> to select matching packets, with limited success: while it does
> match the packet containing the response header, additional packets
> in the same stream don't retain the fwmark (unsurprisingly).
>
> Does anyone have any ideas of -- or even better, experience with --
> a stack which can achieve this? squid's built-in rate limiting
> doesn't have the concept of borrowing bandwidth, so that's out.
>
> I'm open to pretty much anything: userspace proxies (either in front
> of or replacing squid) are fine.
>
> Another option is simply to "punish" bandwidth hogs: the primary
> goal is to ensure downloads of large files don't slow down users
> that are browing webpages. Possibly just using SFQ will work for
> this, but I'm not sure.
>
> Any suggestions would be appreciated. I'm even open to changing
> platform (e.g. FreeBSD), but I'd prefer to stick with Debian as it's
> what I'm most comfortable with.
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>
>   


-- 
Sds.

Alexandre J. Correa
Onda Internet
www.ondainternet.com.br
Linux User ID #142329