libnetfilter_conntrack.so and C++

libnetfilter_conntrack.so and C++

[denis stauffer]

Hi everybody,

I'm trying to develop a C++ programm wich uses
libnetfilter_conntrack.so library. I've encountered a problem when
linking the library : the called funtions in libnetfilter_contrack are
not recognized.
If some one has succeeded to use the libnetfilter_conntrack library
with g++, please can you gve me some information about how to do it.

Thank's in advance,
Denis

Re: libnetfilter_conntrack.so and C++

[Jan Engelhardt]

> Hi everybody,
>
> I'm trying to develop a C++ programm wich uses
> libnetfilter_conntrack.so library. I've encountered a problem when
> linking the library : the called funtions in libnetfilter_contrack are
> not recognized.
> If some one has succeeded to use the libnetfilter_conntrack library
> with g++, please can you gve me some information about how to do it.

extern "C" {
#include <linux/netfilter.h>
#include <foo/bar.h>
}


Slightly ugly.


Jan Engelhardt
-- 

Re: libnetfilter_conntrack.so and C++

[Eric Leblond]

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Hi,

Le lundi 25 septembre 2006 à 10:51 +0200, denis stauffer a écrit :
> Hi everybody,
> 
> I'm trying to develop a C++ programm wich uses
> libnetfilter_conntrack.so library. I've encountered a problem when
> linking the library : the called funtions in libnetfilter_contrack are
> not recognized.
> If some one has succeeded to use the libnetfilter_conntrack library
> with g++, please can you gve me some information about how to do it.
> 
> Thank's in advance,
> Denis

Coud you try the following patch ?

BR,
-- 
Éric Leblond, eleblond@inl.fr
Téléphone : 01 44 89 46 39, Fax : 01 44 89 45 01
INL, http://www.inl.fr

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Index: include/libnetfilter_conntrack/libnetfilter_conntrack.h
===================================================================
--- include/libnetfilter_conntrack/libnetfilter_conntrack.h	(revision 6670)
+++ include/libnetfilter_conntrack/libnetfilter_conntrack.h	(working copy)
@@ -8,6 +8,18 @@
 #ifndef _LIBNETFILTER_CONNTRACK_H_
 #define _LIBNETFILTER_CONNTRACK_H_
 
+
+/* Disable inline keyword when compiling in strict ANSI conformance */
+#if defined(__STRICT_ANSI__) && !defined(__cplusplus)
+#  define inline
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+
 #include <netinet/in.h>
 #include <libnfnetlink/linux_nfnetlink.h>
 #include <libnfnetlink/libnfnetlink.h>
@@ -332,6 +344,8 @@
 extern void nfct_build_tuple(struct nfnlhdr *req, int size, 
 			     struct nfct_tuple *t, int type);
 
+#ifdef __cplusplus
+}
+#endif
 
-
 #endif	/* _LIBNETFILTER_CONNTRACK_H_ */

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