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Wireshark-dev: [Wireshark-dev] Re new plug-in dissector - no packets, , displayed when dissect

From: Stuart Marsden <stuart@xxxxxxxxxxxx>
Date: Tue, 05 May 2009 13:04:17 +0100
Hi,

	   6
thanks 1*10

works a treat, just proves there is now substitute for talent

Stuart

------------------

From: Guy Harris <guy@xxxxxxxxxxxx>
Subject: Re: [Wireshark-dev] new plug-in dissector - no packets,
	displayed when dissector specific filter applied


On May 1, 2009, at 9:10 AM, Stuart Marsden wrote:

>    hf_sslbp_type = frmtyp;
  
Don't do that.  If you do that, then, even if you *do* correctly  
attempt to add sslbp.frametype into the protocol tree, it will fail,  
as the value assigned by Wireshark to hf_sslbp_type is an index into  
an array of fields internal to the Wireshark core, and if you give it  
a different value, it'll put the wrong field into the protocol tree.

>    proto_tree_add_text(header_tree, tvb, offset+3, 1,
>        "Frame type: %s", val_to_str(frmtyp,frame_type,"Unknown (0x 
> %02x)"));
  
If you want sslbp.frametype to be in the protocol tree, do

	proto_tree_add_uint(header_tree, hf_sslbp_type, tvb, offset+3, 1,  
frmtyp);

If sslbp.frametype isn't in the protocol tree, any filter trying to  
match it will fail, so you want it in the protocol tree.

See doc/README.developer in the source tree.