Re: tc filter for small udp packets < 64 bytes

Salatiel Filho wrote:
> Hi guys, according  to http://lartc.org/howto/lartc.adv-filter.html i
> can use the following filter  to match ACKs on packets smaller than 64
> bytes:
>          tc filter add dev $interface parent 1:0 protocol ip prio 1 u32 \
>              match ip protocol 6 0xff \
>              match u8 0x05 0x0f at 0 \
>              match u16 0x0000 0xffc0 at 2 \
>              match u8 0x10 0xff at 33 \
>              flowid 1:10
> 
> but how can i filter any udp packet smaller than 64 bytes?

Untested, but I guess

tc filter add dev $interface parent 1:0 protocol ip prio 1 u32 \
              match ip protocol 17 0xff \
              match u16 0x0000 0xffc0 at 2 \
              flowid 1:10

should do it.