Wireshark-dev: Re: [Wireshark-dev] lenght
From: "Didier" <[email protected]>
Date: Wed, 14 Nov 2007 22:08:01 +0100
Hi

On Wed, 14 Nov 2007 17:49:06 +0000, khalid habibi wrote
> i m a beginner.
> I have the following output:
>  
> DATA: 005F000103E5
> I will spend it in HEX also 0x.
> Because it has an variable length, I do not know how to do this?
>  

> proto_tree_add_item(application_tree, hf_data_nbyte, tvb, offset, -1, pdu_ackd);
-1 means to the end of the tvb buffer.

In your case:

 len = tvb_get_guint8(tvb, offset); // or  tvb_get_ntohs(tvb, offset); if it's 16 bits and so on.

proto_tree_add_item(application_tree, hf_data_nbyte, tvb, offset, len, pdu_ackd);
offset +=len;

or len +1, but you get the idea.
>  
> { &hf_data_nbyte,
>    { "DATA",       "lon.datum",
>    FT_BYTES, BASE_HEX, NULL, 0,          
>     "DATA", HFILL }
>    }
>

Didier