| .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) |
