mixing c/c++ to write a plugin

c++
plugins

asked 2018-04-17 13:05:56 +0000

tof
3 ●3 ●5 ●6

Hello

After having spent a few hours in prototyping my custom protocol dissector with LUA, I decided to switch to C (Win10 x64 / VS2015 / 2.9.0rc of WS)

We already have a code base in some othre projects consuming that same protocol, but it is written in C++. Is it possible to use C++ to write a dissector plugin or am I stuck to C?

Thanks

Christophe

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2 Answers

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answered 2024-04-16 15:36:00 +0000

Himanshu

1 ●1

updated 2024-04-16 15:36:30 +0000

It can be done by dividing the protocol in C and C++ like below (creating DLMS plugin for wireshark. May want to refer my GitHub repository for the same:

#!/bin/sh
g++ -Wall -Wno-sign-compare -Wno-unused-variable -Wno-unused-function \
    `pkg-config --cflags-only-I wireshark` \
    -Iinclude \
    -shared \
    -fPIC \
    -o dlms.o \
    -c dlms.cpp \
&& \
ar rs libdlms.a dlms.o \
&& echo "libdlms.a created" \
&& rm dlms.o \
&& \
gcc -Wall -Wno-sign-compare \
    `pkg-config --cflags-only-I wireshark` \
    -Iinclude \
    -shared \
    -o dlms.so \
    proto.c libdlms.a \
&& echo "dlms.so created" \
&& rm libdlms.a \
&& sudo cp dlms.so /usr/lib/x86_64-linux-gnu/wireshark/plugins/3.2/epan \
&& echo "dlms.so copied to wireshark plugins" \
&& rm dlms.so

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Comments

With proper use of extern "C" it may be possible to write it completely in C++ (if C++ compilers turn extern "C" functions into code that follows the platform's C ABI/procedure call interface).