Detailed Description

TCP header.

Access this header after checking transport protocol:

if (packet_transport_proto(ctx) == IP_PROTO_TCP) {
    struct TcpHeader* tcp = packet_transport_header(ctx);
    ...
}

Note: This function is for advanced users. Prefer packet_flow() to get ports. Prefer packet_transport_payload() to access payload and its length.; If you modify the fields of this header and return result_pass from the filter, call set_packet_mangled() to update checksums.

See also: https://en.wikipedia.org/wiki/Transmission_Control_Protocol#TCP_segment_structure; https://tools.ietf.org/html/rfc793

The documentation for this struct was generated from the following file: