dnsjit.core.object.tcp(3)

Overview

A TCP segment header. The data itself is in the dnsjit.core.object.payload object, which is the next object in the chain after parsing with, for example, dnsjit.filter.layer.

Attributes

`sport`	Source port.
`dport`	Destination port.
`seq`	Sequence number.
`ack`	Acknowledgement number.
`off`	Data offset.
`x2`	Unused.
`flags`	TCP flags.
`win`	Window.
`sum`	Checksum.
`urp`	Urgent pointer.
`opts`	Array of bytes with the TCP options found.
`opts_len`	Length of the TCP options.

Functions

`Tcp:type()`	Return the textual type of the object.
`Tcp:prev()`	Return the previous object.
`Tcp:cast()`	Cast the object to the underlining object module and return it.
`Tcp:uncast()`	Cast the object to the generic object module and return it.
`Tcp:copy()`	Make a copy of the object and return it.
`Tcp:free()`	Free the object, should only be used on copies or otherwise allocated.

AUTHORS and CONTRIBUTORS

Jerry Lundström (DNS-OARC), Tomáš Křížek (CZ.NIC), Petr Špaček (ISC)

Maintained by DNS-OARC

https://www.dns-oarc.net/

Releases

2 releases since Debian 12 (Bookworm); the text changed 1 time.

12
13

Referred to by

dnsjit.core.object(3) Base object that is passed between receiver and receivee dnsjit.core.objects(3) Easy way to import all objects dnsjit.filter.layer(3) Parse the ether/IP stack dnsjit.core.object.payload(3) Application data payload