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PROBE::NETFILTER.B(3stap) Networking Tapset PROBE::NETFILTER.B(3stap)

NAME

probe::netfilter.bridge.pre_routing - - Called before a bridging packet is routed

SYNOPSIS

netfilter.bridge.pre_routing

VALUES

br_type

BPDU type

indev_name

Name of network device packet was received on (if known)

data_hex

A hexadecimal string representing the packet buffer contents

llcpdu

Address of LLC Protocol Data Unit

br_max

Max age in 1/256 secs

length

The length of the packet buffer contents, in bytes

br_fd

Forward delay in 1/256 secs

br_bid

Identity of bridge

pf

Protocol family -- always “bridge”

br_prid

Protocol identifier

protocol

Packet protocol

br_msg

Message age in 1/256 secs

data_str

A string representing the packet buffer contents

br_vid

Protocol version identifier

nf_queue

Constant used to signify a 'queue' verdict

outdev_name

Name of network device packet will be routed to (if known)

nf_stop

Constant used to signify a 'stop' verdict

nf_stolen

Constant used to signify a 'stolen' verdict

nf_drop

Constant used to signify a 'drop' verdict

brhdr

Address of bridge header

br_rid

Identity of root bridge

br_htime

Hello time in 1/256 secs

llcproto_stp

Constant used to signify Bridge Spanning Tree Protocol packet

br_mac

Bridge MAC address

br_cost

Total cost from transmitting bridge to root

br_rmac

Root bridge MAC address

indev

Address of net_device representing input device, 0 if unknown

nf_accept

Constant used to signify an 'accept' verdict

outdev

Address of net_device representing output device, 0 if unknown

br_poid

Port identifier

nf_repeat

Constant used to signify a 'repeat' verdict

br_flags

BPDU flags

SEE ALSO0

tapset::netfilter(3stap)

October 2025 SystemTap Tapset Reference