Hi,
The lenny version of the tc(8) manual page no longer contains broken
references, but the situation didn't improve much otherwise.
The manual page says:
tc filter [ add | change | replace ]
dev DEV
[ parent qdisc-id | root]
protocol protocol
prio priority
filtertype [ filtertype specific parameters ]
flowid flow-id
Whereas the tc binary says:
% sudo tc filter help
Usage: tc filter [ add | del | change | get ] dev STRING
[ pref PRIO ] [ protocol PROTO ]
[ estimator INTERVAL TIME_CONSTANT ]
[ root | classid CLASSID ] [ handle FILTERID ]
[ [ FILTER_TYPE ] [ help | OPTIONS ] ]
tc filter show [ dev STRING ] [ root | parent CLASSID ]
Where:
FILTER_TYPE := { rsvp | u32 | fw | route | etc. }
FILTERID := ... format depends on classifier, see there
OPTIONS := ... try tc filter add <desired FILTER_KIND> help
% sudo tc filter add dev eth0 parent 1:0 protocol ip rsvp help
Usage: ... rsvp ipproto PROTOCOL session DST[/PORT | GPI ]
[ sender SRC[/PORT | GPI ]
[ classid CLASSID ] [ police POLICE_SPEC ]
[ tunnelid ID ] [ tunnel ID skip NUMBER ]
Where: GPI := { flowlabel NUMBER | spi/ah SPI | spi/esp SPI |
u{8|16|32} NUMBER mask MASK at OFFSET}
POLICE_SPEC := ... look at TBF
FILTERID := X:Y
NOTE: CLASSID is parsed as hexadecimal input.
% sudo tc filter add dev eth0 parent 1:0 protocol ip u32 help
Usage: ... u32 [ match SELECTOR ... ] [ link HTID ] [ classid CLASSID ]
[ police POLICE_SPEC ] [ offset OFFSET_SPEC ]
[ ht HTID ] [ hashkey HASHKEY_SPEC ]
[ sample SAMPLE ]
or u32 divisor DIVISOR
Where: SELECTOR := SAMPLE SAMPLE ...
SAMPLE := { ip | ip6 | udp | tcp | icmp | u{32|16|8} | mark }
SAMPLE_ARGS [divisor DIVISOR]
FILTERID := X:Y:Z
NOTE: CLASSID is parsed at hexadecimal input.
% sudo tc filter add dev eth0 parent 1:0 protocol ip fw help
Usage: ... fw [ classid CLASSID ] [ police POLICE_SPEC ]
POLICE_SPEC := ... look at TBF
CLASSID := X:Y
NOTE: CLASSID is parsed as hexadecimal input.
% sudo tc filter add dev eth0 parent 1:0 protocol ip route help
Usage: ... route [ from REALM | fromif TAG ] [ to REALM ]
[ flowid CLASSID ] [ police POLICE_SPEC ]
POLICE_SPEC := ... look at TBF
CLASSID := X:Y
NOTE: CLASSID is parsed as hexadecimal input.
<end>
Just making these two consistent would be an improvement :)
But an actual explanation of how u32 and others work would
be necessary to make the documentation really useful.
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