how to remove/unregister a dissector?

[George Nychis <gnychis () gmail com>]

Hi all,

I am looking for the cleanest way to remove or unregister a set of
dissectors from libwireshark.  When using libwireshark, I register using:
  epan_init(register_all_protocols, register_all_protocol_handoffs, NULL,
NULL,
            failure_message, open_failure_message, read_failure_message,
            write_failure_message);

However, there are some protocols I do not want registered.  Like,
packet-smb* ... so, is there a way to unregister certain protocols after
registering them all?

Another alternative, is to remove packet-smb* from the build.  I thought a
simple way to do this would be to remove it from register.c as a quick hack,
but that seems to break many things.  So then I looked in to how register.c
is generated, and I couldn't find a good answer.  I thought that I could
remove packet-smb* from epan/CMakeLists.txt, and after cleaning and entirely
rebuilding, it would remove packet-smb* from the dissectors library.  But,
it doesn't seem like that is where it is getting generated from.

This is where I am at now.  I can hack at epan/dissectors/Makefile to remove
specific protocols, but I want it to be something more robust.  Are there
any better methods?

Thanks!
George

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