Re: Assertion error

[FYI, Wireshark-dev is probably a better place to ask such questions now...]

Jim Fan wrote:
> Hi, I am getting an error in one of the packets I am decoding:
>  
> dissector bug, protocol xxx: proto.c:2742 Failed assertion 
> "(guint)hfIndex < gpa_hfInfo.len"
>  
> I found that this could be related to the limitation of how many header 
> fields can a protocol have. 200 is the default value. In my case I have 
> over 200 header fields (approximately 260), therefore any header fields 
> that is after the 200th are reported as assertion error. Ethereal should 
> have the ability of dynamically increases the memory allocation on the 
> go based on the dissector definition, but somehow I am getting this 
> error here.
>  
> Anyone has any idea about how to fix this problem?

The header fields are dynamically allocated--by the dissector, no less. 
  Are they all being registered in 'proto_register_field_array()'?  Are 
you sure you don't have something wrong with your 'hf_register_info' 
array (maybe around the 200th entry) that causes 
'proto_register_field_array()' to not read the whole array?

As an example, packet-h245.c has a few more than 200 header fields:

> mozart [~/Projects/wireshark/source/]> egrep -c "^static int hf" epan/dissectors/packet-h245.c
> 1375