Wireshark · Ethereal-dev: RE: [Ethereal-dev] GTP dissector: probable bug, some assistance needed

[<Michal.Melerowicz@xxxxxxxxx>]

Hi Flavio

Please send me some examples of GTP-U with PPP payload, and I will try to get it working for any GTP coming from any vendor.

Thanks in advance for cooperation, cheers

Michal

-----Original Message-----
From: ext Flavio Poletti [mailto:flavio@xxxxxxxxxxx]
Sent: Friday, August 30, 2002 6:17 PM
To: ethereal-dev@xxxxxxxxxxxx
Subject: [Ethereal-dev] GTP dissector: probable bug, some assistance
needed


Hi,

  still on the GTP dissector... 

I noticed that PPP embedded in PCO from mobiles are incorrectly displayed. 
In particular, when I select the line "Point-to-Point Protocol" (which is 
two lines below "[WARNING] Next 3 bytes...") I notice that the hexadecimal 
highlighting is incorrect, i.e. two more octets are selected. 

I think that the problem is in line 3824, within function 
decode_gtp_proto_conf(): 

 next_tvb = tvb_new_subset (tvb, offset + 1, proto_len + 2, proto_len + 2); 

Why do we need to pass "proto_len + 2"? Could it be here that the problem 
arises? I've also noted that the contents of the PPP dissector are correctly 
handles, i.e. the two extra bytes are not highlighted. 

Thank you in advance and best regards, 

  Flavio. 

 --
Flavio Poletti
flavio[AT]polettix.it 
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