Re: [LARTC] A tc htb/iptables rate control script for ADSL

[don-lartc@isis.cs3-inc.com (Don Cohen)]

 > From: Martin Devera <devik@cdi.cz>
 > I'm happy that HTB gained so much popularity ;) Only
 > one hint for you - you can completely avoid all these
 > tc filter add .... fw ...
 > You can use only one
 > tc filter add dev ppp0 parent 1: protocol ip prio 1 handle 1 fw
 > 
 > and set classid directly in iptables like:
 > iptables -t mangle -A to-dsl -p tcp --dport 80 -j MARK --set-mark 0x10010
 > iptables -t mangle -A to-dsl -p tcp --sport 24 -j MARK --set-mark 0x10020
 > 
 > and so on ..
 > devik
 > 
 > 
 > On 17 Apr 2002, alex wrote:
 > 
 > >     /sbin/iptables -t mangle -A to-dsl -p tcp --dport 22   -j MARK
 > > --set-mark 1
 > >
 > >     /sbin/iptables -t mangle -A to-dsl -p tcp --dport 80   -j MARK
 > > --set-mark 2
 > >
 > >     /sbin/tc filter add dev ppp0 parent 1: protocol ip prio 1 handle 1
 > > fw classid 1:10
 > >     /sbin/tc filter add dev ppp0 parent 1: protocol ip prio 2 handle 2
 > > fw classid 1:20

Is this documented anywhere?  How/why does it work?
I gather that the mark is interpreted as 16 bits of parent and 16 bits
of class.  But you couldn't you also have said something like this?
 iptables -t mangle -A to-dsl -p tcp --dport 80 -j MARK --set-mark 0x10010
 /sbin/tc filter add dev ppp0 parent 1: protocol ip prio 1
  handle 10 fw classid 1:20
         **            ****
Would that just not work?
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