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tc-flower(8)


NAME

   flower - flow based traffic control filter

SYNOPSIS

   tc  filter  ...  flower [ MATCH_LIST ] [ action ACTION_SPEC ] [ classid
           CLASSID ]

   MATCH_LIST := [ MATCH_LIST ] MATCH

   MATCH := { indev ifname | { dst_mac | src_mac } mac_address |  eth_type
           {  ipv4 | ipv6 | ETH_TYPE } | ip_proto { tcp | udp | IP_PROTO }
           | { dst_ip | src_ip } {  ipv4_address  |  ipv6_address  }  |  {
           dst_port | src_port } port_number }

DESCRIPTION

   The  flower  filter  matches  flows  to  the  set of keys specified and
   assigns an arbitrarily chosen class ID to packets  belonging  to  them.
   Additionally  (or  alternatively)  an  action  from  the generic action
   framework may be called.

OPTIONS

   action ACTION_SPEC
          Apply an action from the generic actions framework  on  matching
          packets.

   classid CLASSID
          Specify  a  class to pass matching packets on to.  CLASSID is in
          the form X:Y, while X  and  Y  are  interpreted  as  numbers  in
          hexadecimal format.

   indev ifname
          Match  on  incoming  interface  name. Obviously this makes sense
          only for forwarded flows.  ifname is the name  of  an  interface
          which must exist at the time of tc invocation.

   dst_mac mac_address
   src_mac mac_address
          Match on source or destination MAC address.

   eth_type ETH_TYPE
          Match on layer three protocol.  ETH_TYPE may be either ipv4,ipv6
          or an unsigned 16bit value in hexadecimal format.

   ip_proto IP_PROTO
          Match on layer four protocol.  IP_PROTO may be either tcp,udp or
          an unsigned 8bit value in hexadecimal format.

   dst_ip ADDRESS
   src_ip ADDRESS
          Match  on  source  or destination IP address.  ADDRESS must be a
          valid IPv4 or IPv6 address, depending on ether_type,  which  has
          to be specified in beforehand.

   dst_port NUMBER
   src_port NUMBER
          Match  on  layer  4  protocol source or destination port number.
          Only available for ip_proto values udp and tcp, which has to  be
          specified in beforehand.

NOTES

   As stated above where applicable, matches of a certain layer implicitly
   depend on the matches of the next lower layer. Precisely, layer one and
   two  matches  ( indev,dst_mac,src_mac and eth_type) have no dependency,
   layer three matches (  ip_proto,dst_ip  and  src_ip)  require  eth_type
   being  set  to  either  ipv4  or ipv6, and finally layer four matches (
   dst_port and src_port) depend on ip_proto being set to  either  tcp  or
   udp.

   There  can be only used one mask per one prio. If user needs to specify
   different mask, he has to use different prio.

SEE ALSO

   tc(8), tc-flow(8)



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