.TH "SKB editing action in tc" 8 "12 Jan 2015" "iproute2" "Linux"

.SH NAME

skbedit - SKB editing action

.SH SYNOPSIS

.in +8

.ti -8

.BR tc " ... " "action skbedit " [ " queue_mapping

.IR QUEUE_MAPPING " ] ["

.B priority

.IR PRIORITY " ] ["

.BI mark " MARK\fR[\fB/\fIMASK] ] ["

.B ptype

.IR PTYPE " ] ["

.BR inheritdsfield " ]"

.SH DESCRIPTION

The

.B skbedit

action allows to change a packet's associated meta data. It complements the

.B pedit

action, which in turn allows to change parts of the packet data itself.

The most unique feature of

.B skbedit

is its ability to decide over which queue of an interface with multiple

transmit queues the packet is to be sent out. The number of available transmit

queues is reflected by sysfs entries within

.I /sys/class/net/<interface>/queues

with name

.I tx-N

(where

.I N

is the actual queue number).

.SH OPTIONS

.TP

.BI queue_mapping " QUEUE_MAPPING"

Override the packet's transmit queue. Useful when applied to packets transmitted

over MQ-capable network interfaces.

.I QUEUE_MAPPING

is an unsigned 16bit value in decimal format.

.TP

.BI priority " PRIORITY"

Override the packet classification decision.

.I PRIORITY

is either

.BR root ", " none

or a hexadecimal major class ID optionally followed by a colon

.RB ( : )

and a hexadecimal minor class ID.

.TP

.BI mark " MARK\fR[\fB/\fIMASK]"

Change the packet's firewall mark value.

.I MARK

is an unsigned 32bit value in automatically detected format (i.e., prefix with

.RB ' 0x '

for hexadecimal interpretation, etc.).

.I MASK

defines the 32-bit mask selecting bits of mark value. Default is 0xffffffff.

.TP

.BI ptype " PTYPE"

Override the packet's type. Useful for setting packet type to host when

needing to allow ingressing packets with the wrong MAC address but

correct IP address.

.I PTYPE

is one of: host, otherhost, broadcast, multicast

.TP

.BI inheritdsfield

Override the packet classification decision, and any value specified with

.BR priority ", "

using the information stored in the Differentiated Services Field of the

IPv6/IPv4 header (RFC2474).

.SH SEE ALSO

.BR tc (8),

.BR tc-pedit (8)