| PROBE::NETFILTER.I(3stap) | Networking Tapset | PROBE::NETFILTER.I(3stap) |
NAME¶
probe::netfilter.ip.pre_routing - Called before an IP packet is routed
SYNOPSIS¶
probe netfilter.ip.pre_routing {}
VALUES¶
pf
Protocol family - either 'ipv4' or 'ipv6'
indev
Address of net_device representing input device, 0 if
unknown
sport
TCP or UDP source port (ipv4 only)
ack
TCP ACK flag (if protocol is TCP; ipv4 only)
psh
TCP PSH flag (if protocol is TCP; ipv4 only)
nf_accept
Constant used to signify an 'accept' verdict
nf_repeat
Constant used to signify a 'repeat' verdict
outdev
Address of net_device representing output device, 0 if
unknown
saddr
A string representing the source IP address
data_hex
A hexadecimal string representing the packet buffer
contents
outdev_name
Name of network device packet will be routed to (if
known)
nf_stolen
Constant used to signify a 'stolen' verdict
urg
TCP URG flag (if protocol is TCP; ipv4 only)
data_str
A string representing the packet buffer contents
ipproto_tcp
Constant used to signify that the packet protocol is
TCP
nf_stop
Constant used to signify a 'stop' verdict
protocol
Packet protocol from driver (ipv4 only)
fin
TCP FIN flag (if protocol is TCP; ipv4 only)
indev_name
Name of network device packet was received on (if
known)
family
IP address family
dport
TCP or UDP destination port (ipv4 only)
rst
TCP RST flag (if protocol is TCP; ipv4 only)
length
The length of the packet buffer contents, in bytes
ipproto_udp
Constant used to signify that the packet protocol is
UDP
syn
TCP SYN flag (if protocol is TCP; ipv4 only)
iphdr
Address of IP header
nf_drop
Constant used to signify a 'drop' verdict
nf_queue
Constant used to signify a 'queue' verdict
daddr
A string representing the destination IP address
SEE ALSO0¶
tapset::netfilter(3stap)
| September 2026 | SystemTap Tapset Reference Ver |