Wireshark · Wireshark-dev: Re: [Wireshark-dev] Calling C++ files from C dissector

["Behdad Forghani" <behdad.forghani@xxxxxxxxx>]

Let's say you want to write a function x with C calling function to call a
function called y in a C++ libarary.
In file x.cpp, declare
extern "C" void x()
{
  y();
}
In Wireshark call x.
Link Wireshark, x and library together.

-----Original Message-----
From: wireshark-dev-bounces@xxxxxxxxxxxxx
[mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of gogrady@xxxxxxxxx
Sent: Monday, February 02, 2009 12:25 PM
To: wireshark-dev@xxxxxxxxxxxxx
Subject: Re: [Wireshark-dev] Calling C++ files from C dissector

Sorry, a bit over my head. so declare the functions i'm going to use in the
library with extern? what if i can't change anything in the library, i was
hoping that i could create a third file that i could use. So my dissector ->
third file -> library. would i use extern in the third file and then not
need it in the library functions? and what do you mean by linking it to my
code? Sorry, like i said, not very experienced

Greg

--------------------------------------------------
You need to declare your function to use C calling convention using extern
"C" declaration and then you can link it into your code.

-----Original Message-----
From: wireshark-dev-bounces@xxxxxxxxxxxxx
[mailto:wireshark-dev-bounces@xxxxxxxxxxxxx] On Behalf Of gogrady@xxxxxxxxx
Sent: Monday, February 02, 2009 12:09 PM
To: wireshark-dev@xxxxxxxxxxxxx
Subject: [Wireshark-dev] Calling C++ files from C dissector

Hello,

So i'm writing a custom dissector. I have a library for a custom protocol
which has functions i need to call. What i want to do is take the raw data,
send it to the library, and the library will send back the useful
information for output. I've written the dissector code for getting the raw
data, but now i don't know how to call the library. I want to create a
proxy, or another file that i will use to call the library so my dissector
isnt interacting directly with the library. I'm not sure how i even start to
do this. any help would be greatly appreciated, i'm new to C/C++.

Thank,
Greg
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