Wireshark-dev: Re: [Wireshark-dev] Help with adding/displaying a particular type of field to a
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From: Jaap Keuter <jaap.keuter@xxxxxxxxx>
Date: Thu, 04 Jun 2009 22:04:08 +0200
Hi,

FT_BYTES, BASE_NONE

Thanx,
Jaap

fschorr@xxxxxxxxxxx wrote:

Group,
I'm having problems trying to figure out how to add/display a particular type field to a subtree. It seems no matter what I try I keep getting the following error in the Packets Detail windows:
[Dissector bug, protocol SMART: proto.c:1006: failed assertion "DISSECTOR_ASSERT_NOT_REACHED"]
I've tried to find code examples in other dissectors but I don't know just what type of field most of the dissectors are trying to deal with. I think I'm just having a mental block about this one! Any suggestions to get me over this hump will be greatly appreciated! 

Field description:
The protocol contains the length of the field - in my example it's 17 bytes. 

     In hex the data in the field looks like:

          50 53 46 00 00 02 00 00 6f 44 63 69 6d 2e 66  6c 65

     (ASCII bytes with NULL bytes embedded within the ASCII bytes)

Code example:
I have tried a number of different FT types with the same type of "failed assertion" error. 

       ...
     { &hf_test,
        { "Field test", "test.test",
FT_UINT_BYTES, BASE_HEX, NULL, 0x0, "Field test", HFILL}} 
     ...
     field_length = 17;
     offset = current_offset;
     proto_tree_add_item(tree, hf_test, tvb, offset, field_length, FALSE);
Should I be using the proto_tree_add_item() call for displaying? If so, which FT type would be appropriate? 

Many thanks,

Frank Schorr
     ..