Field with flags dissected

["Crawford, Anthony R" <Anthony.R.Crawford () charter com>]

Hi all,
I need some help dissecting a field with its flags. I am trying to present the dissection of a single field with its 
value, then the dissected flags under it, presented like this:

Message ID: 0x8013
    10.. .... .... .... = Message Discriminator: Server and Network (2)
    ..00 0000 0001 .... = Message Scenario: Session Setup (1)
    .... .... .... 0011 = Message Type: Response Message (3)

However it is being presented like this instead:

Message ID: 0x8013, Message Discriminator: Server and Network, Message Scenario: Session Setup, Message Type: Response 
Message
    10.. .... .... .... = Message Discriminator: Server and Network (2)
    ..00 0000 0001 .... = Message Scenario: Session Setup (1)
    .... .... .... 0011 = Message Type: Response Message (3)

Anything after the 0x8013 in the same line I do not need.

Here is my code:

static const int *message_id_bits[] = {
        &hf_dsmcc_un_sess_flag_message_discriminator,
        &hf_dsmcc_un_sess_flag_message_scenario,
        &hf_dsmcc_un_sess_flag_message_type
    };

proto_tree_add_bitmask(sub_tree, tvb, offset, hf_dsmcc_message_id, ett_dsmcc_message_id, message_id_bits, ENC_NA);


I've spent the whole day trying to figure out how to present bitwise dissections. I haven't been able to find the right 
solution despite reading dissection docs and other source codes.


Thanks,
Anthony

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