Equalizing bandwidth according to use

[Joaquim Pedro França Simão <osmano807@xxxxxxxxx>]

I need a way to prioritize packets without setting bandwidth limits.
For example, I have a client using the whole bandwidth. As soon as other 
clients need bandwidth, reduce the bandwidth of the former to not impair 
navigation, but as soon as finish the download, restore the initial 
client to his full bandwidth.

I'm trying to control torrent bandwidth usage to not impact the 
navigation, but at the same time using all the bandwidth when there is 
no navigation. The torrent traffic had TOS 0x48.

I tried a script using HFSC, but did not work as expected.

    #!/bin/bash

    TC=/usr/sbin/tc

    DEV=ppp0

    ID=1

    # Cleanup
    $TC qdisc del dev $DEV root 2>/dev/null

    # Classes

    ## Dev class
    $TC qdisc add dev $DEV root handle $ID: hfsc

    ## Root class
    $TC class add dev $DEV parent $ID: classid $ID:1 hfsc \
        sc rate 600kbit \
        ul rate 600kbit

    ## HTTP and prioritized packets
    $TC class add dev $DEV parent $ID:1 classid $ID:10 hfsc \
        sc rate 400kbit \
        ul rate 600kbit

    ## Trash traffic
    $TC class add dev $DEV parent $ID:1 classid $ID:20 hfsc \
        ul rate 400kbit \
        ls rate 200kbit


    # Filters

    ## Torrent
    $TC filter add dev $DEV parent $ID:0 protocol ip prio 1 u32 \
        match ip tos 0x48 0xff \
        flowid 1:20

    ## Resto
    $TC filter add dev $DEV parent $ID:0 prio 5 u32 \
        match ip src any flowid 1:10

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