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