probe::netfilter.ip.pre_routing — Called before an IP packet is routed
netfilter.ip.pre_routing
daddrA string representing the destination IP address
sportTCP or UDP source port (ipv4 only)
ipproto_tcpConstant used to signify that the packet protocol is TCP
nf_repeatConstant used to signify a 'repeat' verdict
ipproto_udpConstant used to signify that the packet protocol is UDP
saddrA string representing the source IP address
protocolPacket protocol from driver (ipv4 only)
nf_dropConstant used to signify a 'drop' verdict
rstTCP RST flag (if protocol is TCP; ipv4 only)
pfProtocol family - either 'ipv4' or 'ipv6'
nf_queueConstant used to signify a 'queue' verdict
outdevAddress of net_device representing output device, 0 if unknown
pshTCP PSH flag (if protocol is TCP; ipv4 only)
ackTCP ACK flag (if protocol is TCP; ipv4 only)
indevAddress of net_device representing input device, 0 if unknown
outdev_nameName of network device packet will be routed to (if known)
nf_acceptConstant used to signify an 'accept' verdict
iphdrAddress of IP header
familyIP address family
synTCP SYN flag (if protocol is TCP; ipv4 only)
urgTCP URG flag (if protocol is TCP; ipv4 only)
dportTCP or UDP destination port (ipv4 only)
finTCP FIN flag (if protocol is TCP; ipv4 only)
nf_stolenConstant used to signify a 'stolen' verdict
nf_stopConstant used to signify a 'stop' verdict
indev_nameName of network device packet was received on (if known)
lengthThe length of the packet buffer contents, in bytes