@@ -94,6 +94,8 @@

 #include "t_lookup.h"

 #include "t_stats.h"

+MODULE_VERSION

+

 inline static int w_t_check(struct sip_msg* msg, char* str, char* str2);

@@ -31,6 +31,7 @@

  *  2003-03-19  replaced all mallocs/frees w/ pkg_malloc/pkg_free (andrei)

  *  2003-03-19  Support for flags in find_export (janakj)

  *  2003-03-29  cleaning pkg_mallocs introduced (jiri)

+ *  2003-04-24  module version checking introduced (jiri)

  */

@@ -147,6 +148,32 @@ error:

 	return ret;

 }

+#ifndef DLSYM_PREFIX

+/* define it to null */

+#define DLSYM_PREFIX

+#endif

+

+static inline int version_control(void *handle, char *path)

+{

+	char **m_ver;

+	char* error;

+

+	m_ver=(char **)dlsym(handle, DLSYM_PREFIX "module_version");

+	if ((error=(char *)dlerror())!=0) {

+		LOG(L_WARN, "WARNING: no version info in module <%s>: %s\n",

+			path, error );

+		return 0;

+	}

+	if (!m_ver || !(*m_ver)) {

+		LOG(L_WARN, "WARNING: no version in module <%s>\n", path );

+		return 0;

+	}

+	if (strcmp(VERSION,*m_ver)==0)

+		return 1;

+	LOG(L_WARN, "WARNING: module version mismatch for %s; "

+		"core: %s; module: %s\n", path, VERSION, *m_ver );

+	return 0;

+}

 /* returns 0 on success , <0 on error */

 int load_module(char* path)

@@ -159,10 +186,6 @@ int load_module(char* path)

 #ifndef RTLD_NOW

 /* for openbsd */

 #define RTLD_NOW DL_LAZY

-#endif

-#ifndef DLSYM_PREFIX

-/* define it to null */

-#define DLSYM_PREFIX

 #endif

 	handle=dlopen(path, RTLD_NOW); /* resolve all symbols now */

 	if (handle==0){

@@ -178,6 +201,8 @@ int load_module(char* path)

 			goto skip;

 		}

 	}

+	/* version control */

+	version_control(handle, path);

 	/* launch register */

 	exp = (struct module_exports*)dlsym(handle, DLSYM_PREFIX "exports");

 	if ( (error =(char*)dlerror())!=0 ){

@@ -66,6 +66,8 @@ typedef enum {

 #define PROC_FIFO     -2  /* FIFO attendant process */

 #define PROC_TCP_MAIN -4  /* TCP main process */

+#define MODULE_VERSION char *module_version=VERSION;

+

 struct cmd_export_ {

 	char* name;             /* null terminated command name */

 	cmd_function function;  /* pointer to the corresponding function */