универсальный 32-битный фильтр управления трафиком (universal 32bit traffic control filter)
Синопсис (Synopsis)
tc filter ... [ handle HANDLE ] u32 OPTION_LIST [ offset OFFSET ]
[ hashkey HASHKEY ] [ classid CLASSID ] [ divisor
uint_value ] [ order u32_value ] [ ht HANDLE ] [ sample
SELECTOR [ divisor uint_value ] ] [ link HANDLE ] [ indev
ifname ] [ skip_hw | skip_sw ] [ help ]
HANDLE := { u12_hex_htid:[u8_hex_hash:[u12_hex_nodeid] |
0xu32_hex_value }
OPTION_LIST := [ OPTION_LIST ] OPTION
HASHKEY := [ mask u32_hex_value ] [ at 4*int_value ]
CLASSID := { root | none | [u16_major]:u16_minor | u32_hex_value
}
OFFSET := [ plus int_value ] [ at 2*int_value ] [ mask
u16_hex_value ] [ shift int_value ] [ eat ]
OPTION := { match SELECTOR | action ACTION }
SELECTOR := { u32 VAL_MASK_32 | u16 VAL_MASK_16 | u8 VAL_MASK_8 |
ip IP | ip6 IP6 | { tcp | udp } TCPUDP | icmp ICMP | mark
VAL_MASK_32 | ether ETHER }
IP := { { src | dst } { default | any | all | ip_address [ / {
prefixlen | netmask } ] } AT | { dsfield | ihl | protocol
| precedence | icmp_type | icmp_code } VAL_MASK_8 | {
sport | dport } VAL_MASK_16 | nofrag | firstfrag | df |
mf }
IP6 := { { src | dst } { default | any | all | ip6_address
[/prefixlen ] } AT | priority VAL_MASK_8 | { protocol |
icmp_type | icmp_code } VAL_MASK_8 | flowlabel
VAL_MASK_32 | { sport | dport } VAL_MASK_16 }
TCPUDP := { src | dst } VAL_MASK_16
ICMP := { type VAL_MASK_8 | code VAL_MASK_8 }
ETHER := { src | dst } ether_address AT
VAL_MASK_32 := u32_value u32_hex_mask [ AT ]
VAL_MASK_16 := u16_value u16_hex_mask [ AT ]
VAL_MASK_8 := u8_value u8_hex_mask [ AT ]
AT := [ at [ nexthdr+ ] int_value ]
