Wireshark-dev: [Wireshark-dev] problems with accessing pinfo, tvb in C, pinfo and tvb are passed from lua

From: yami <yamisoe@xxxxxxxxx>
Date: Tue, 9 Dec 2008 17:46:25 +0800

Hi dev,

Here is my story: my C dissector stores some information in pinfo->private_data, then it calls my lua dissector. I also wrote a C dynamic library which can be called by lua dissector, so that lua dissector can extract information from pinfo->private_data. The whole process can be ilustrated by:

C dissector ---calls---> lua dissector
     ----loadlib---> C function extract data from pinfo->private_data
         ----return-data----> lua dissector

Unfortunately the definition of Pinfo in epan/wslua/wslua.h was changed from rev. 25844 to rev. 25845 [1]. Due to this change, my code make wireshark crash.

My question is: how can we prevent this kind of thing in the futhure? By adding a function (or macro) like this (?)

packet_info* wslua_pinfo(Pinfo pinfo)
{
    return pinfo->ws_pinfo;
}

Thanks!

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[1] See bug 2453: https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=2453