Wireshark · Ethereal-dev: Re: [Ethereal-dev] need help with tvb exceptions

[Andy Howell <AndyHowell@xxxxxxxxxxxxx>]

Peter Johansson wrote:

> Somewhere in your code you are probably doing something similar to 
> proto_tree_add_item(tree,  hf_something, tvb, some_offset, some_length, 
> FALSE);
> My guess is that some_offset + some_length exceeds the value returned by 
> tvb_length(tvb).
> Set a breakpoint in packet-frame.c near or at line 244 (search for 
> "Malformed packet") and run again, check the stack to verify where in 
> your code it causes "an exception" and why.

Peter,

	Thanks for you help. Turns out I was miscalculating the "reported 
length" for tvb_new_subset().

Andy