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probe::netfilter.ip.post_routing(3stap) — Linux manual page

PROBE::NETFILTER.I(3stap)   Networking TapsetPROBE::NETFILTER.I(3stap)

NAME        top

       probe::netfilter.ip.post_routing - Called immediately before an       outgoing IP packet leaves the computer

SYNOPSIS        top

       netfilter.ip.post_routing

VALUES        top

saddr           A string representing the source IP addressfin           TCP FIN flag (if protocol is TCP; ipv4 only)syn           TCP SYN flag (if protocol is TCP; ipv4 only)daddr           A string representing the destination IP addressurg           TCP URG flag (if protocol is TCP; ipv4 only)nf_queue           Constant used to signify a 'queue' verdictrst           TCP RST flag (if protocol is TCP; ipv4 only)outdev_name           Name of network device packet will be routed to (if known)ipproto_tcp           Constant used to signify that the packet protocol is TCPnf_stolen           Constant used to signify a 'stolen' verdictindev_name           Name of network device packet was received on (if known)sport           TCP or UDP source port (ipv4 only)pf           Protocol family -- either “ipv4” or “ipv6”iphdr           Address of IP headerdport           TCP or UDP destination port (ipv4 only)psh           TCP PSH flag (if protocol is TCP; ipv4 only)length           The length of the packet buffer contents, in bytesipproto_udp           Constant used to signify that the packet protocol is UDPnf_drop           Constant used to signify a 'drop' verdictfamily           IP address familydata_str           A string representing the packet buffer contentsnf_repeat           Constant used to signify a 'repeat' verdictindev           Address of net_device representing input device, 0 if unknownprotocol           Packet protocol from driver (ipv4 only)ack           TCP ACK flag (if protocol is TCP; ipv4 only)outdev           Address of net_device representing output device, 0 if unknowndata_hex           A hexadecimal string representing the packet buffer contentsnf_accept           Constant used to signify an 'accept' verdictnf_stop           Constant used to signify a 'stop' verdict

SEE ALSO        top

tapset::netfilter(3stap)

COLOPHON        top

       This page is part of thesystemtap (a tracing and live-system       analysis tool) project.  Information about the project can be       found at ⟨https://sourceware.org/systemtap/⟩.  If you have a bug       report for this manual page, send it to systemtap@sourceware.org.       This page was obtained from the project's upstream Git repository       ⟨git://sourceware.org/git/systemtap.git⟩ on 2025-08-11.  (At that       time, the date of the most recent commit that was found in the       repository was 2025-07-24.)  If you discover any rendering       problems in this HTML version of the page, or you believe there is       a better or more up-to-date source for the page, or you have       corrections or improvements to the information in this COLOPHON       (which isnot part of the original manual page), send a mail to       man-pages@man7.orgSystemTap Tapset Reference      April 2025PROBE::NETFILTER.I(3stap)

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