Wireshark · Wireshark-dev: [Wireshark-dev] Using "ip.id" for dissector_add

[Lars Friedrichs <larsfriedrichs@xxxxxx>]

Hi there,

I have an obscure protocol I am writing a dissector for. It relies on
the ip.id value set to a certain value (253) so I want to add my
dissector to that value:

void proto_reg_handoff_lusc(void) {
/* registriert das Protokoll samt CallBack für den Dissector mit
Hinweisen auf die automatische Dekodierung */
        static gboolean initialized = FALSE;
        if (!initialized) {
                lusc_handle = create_dissector_handle(dissect_lusc,
proto_lusc);
                global_lusc_ipid_mark = 253;
                dissector_add("ip.id", global_lusc_ipid_mark, lusc_handle);
        }
}

I get an error while wireshark is initializing:
00:43:08          Err  file packet.c: line 697 (dissector_add):
assertion failed: (sub_dissectors)
Aborted (core dumped)

If I read and understand the sources correct it seems that ip.id is not
a known dissector_table but how can I change that? Using "tcp.port"
gives the expected result so I am sure it has to do with "ip.id" being
used with dissector_add.
Can anyone solve my problem?

Thanks,
Lars