The functions are used for static builds to initialize extensions after
libxtables init. Regular library users should not need them, but the
empty declarations introduced in #else case (and therefore present in
user's env) may clash with existing symbol names.
Avoid problems and guard the whole block declaring the function
prototypes and mangling extensions' _init functions by XTABLES_INTERNAL.
Reported-by: Nick <vincent@xxxxxxxxxxxx>
Fixes: 6c689b639cf8e ("Simplify static build extension loading")
Signed-off-by: Phil Sutter <phil@xxxxxx>
---
include/xtables.h | 44 ++++++++++++++++++++++----------------------
1 file changed, 22 insertions(+), 22 deletions(-)
diff --git a/include/xtables.h b/include/xtables.h
index c2694b7b28886..f1937f3ea0530 100644
--- a/include/xtables.h
+++ b/include/xtables.h
@@ -585,27 +585,6 @@ static inline void xtables_print_mark_mask(unsigned int mark,
xtables_print_val_mask(mark, mask, NULL);
}
-#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
-# ifdef _INIT
-# undef _init
-# define _init _INIT
-# endif
- extern void init_extensions(void);
- extern void init_extensions4(void);
- extern void init_extensions6(void);
- extern void init_extensionsa(void);
- extern void init_extensionsb(void);
-#else
-# define _init __attribute__((constructor)) _INIT
-# define EMPTY_FUNC_DEF(x) static inline void x(void) {}
- EMPTY_FUNC_DEF(init_extensions)
- EMPTY_FUNC_DEF(init_extensions4)
- EMPTY_FUNC_DEF(init_extensions6)
- EMPTY_FUNC_DEF(init_extensionsa)
- EMPTY_FUNC_DEF(init_extensionsb)
-# undef EMPTY_FUNC_DEF
-#endif
-
extern const struct xtables_pprot xtables_chain_protos[];
extern uint16_t xtables_parse_protocol(const char *s);
@@ -663,9 +642,30 @@ void xtables_announce_chain(const char *name);
# define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
# endif
+#if defined(ALL_INCLUSIVE) || defined(NO_SHARED_LIBS)
+# ifdef _INIT
+# undef _init
+# define _init _INIT
+# endif
+ extern void init_extensions(void);
+ extern void init_extensions4(void);
+ extern void init_extensions6(void);
+ extern void init_extensionsa(void);
+ extern void init_extensionsb(void);
+#else
+# define _init __attribute__((constructor)) _INIT
+# define EMPTY_FUNC_DEF(x) static inline void x(void) {}
+ EMPTY_FUNC_DEF(init_extensions)
+ EMPTY_FUNC_DEF(init_extensions4)
+ EMPTY_FUNC_DEF(init_extensions6)
+ EMPTY_FUNC_DEF(init_extensionsa)
+ EMPTY_FUNC_DEF(init_extensionsb)
+# undef EMPTY_FUNC_DEF
+#endif
+
extern void _init(void);
-#endif
+#endif /* XTABLES_INTERNAL */
#ifdef __cplusplus
} /* extern "C" */
--
2.34.1
