Wireshark · Ethereal-dev: Re: [Ethereal-dev] Need help with protocol that spans multiple TVBs

[Tomas Kukosa <tomas.kukosa@xxxxxxxxxxx>]

Sid Sid wrote:
> > Yes, although, ideally, the ACSE dissector should perhaps have a
> > string-based dissector table for the OID of the protocol using ACSE, so
> > that dissectors for those protocols can just register in the dissector
> > table, rather than having the ACSE dissector have a hard-wired
> > association of OIDs with dissectors.
>
> Good idea.
> What is the best way to do it ?
> I mean should we have some registration function inside ACSE dissector 
> which will be called by FTAM/CMIP/MMS and so on  dissectors ?

See packet-h225 or packet-h245 for example. Short hint is below.

--- ACSE dissector ---
/* Subdissector tables */
static dissector_table_t application_dissector_table;

show_request_sequence_top() {
...
  app_handle = dissector_get_string_handle(application_dissector_table, oid_string);
...
}

proto_register_acse() {
...
  application_dissector_table = register_dissector_table("acse.application", "???", 
FT_STRING, BASE_NONE);
...
}

--- FTAM dissector ---
proto_reg_handoff_ftam() {
...
  dissector_add_string("acse.application", "1.0.8571.1.1", ftam_handle);
...
}