NAME

       dnsjit.core.object.tcp - A TCP segment header

DESCRIPTION

       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.

SEE ALSO

       dnsjit.core.object(3), dnsjit.core.object.payload(3), dnsjit.filter.layer(3)

AUTHORS and CONTRIBUTORS

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

       Maintained by DNS-OARC

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

BUGS

       For issues and feature requests please use:

              https://github.com/DNS-OARC/dnsjit/issues

       For question and help please use:

              admin@dns-oarc.net