lock the set_message_types() method for imvs

src/libcharon/plugins/tnc_imv/tnc_imv.c

@@ -19,6 +19,7 @@
 
 #include <debug.h>
 #include <library.h>
+#include <threading/mutex.h>
 
 typedef struct private_tnc_imv_t private_tnc_imv_t;
 
@@ -61,6 +62,11 @@ struct private_tnc_imv_t {
 	 * Number of supported message types
 	 */
 	TNC_UInt32 type_count;
+
+	/**
+	 * mutex to lock the imv_t object
+	 */
+	mutex_t *mutex;
 };
 
 METHOD(imv_t, set_id, void,
@@ -90,6 +96,9 @@ METHOD(imv_t, set_message_types, void,
 	int len = sizeof(buf);
 	int written;
 
+	/* lock the imv_t instance */
+	this->mutex->lock(this->mutex);
+
 	/* Free an existing MessageType list */
 	free(this->supported_types);
 	this->supported_types = NULL;
@@ -118,6 +127,9 @@ METHOD(imv_t, set_message_types, void,
 	*pos = '\0';
 	DBG2(DBG_TNC, "IMV %u supports %u message types:%s",
 				  this->id, type_count, buf);
+
+	/* lock the imv_t instance */
+	this->mutex->unlock(this->mutex);
 }
 
 METHOD(imv_t, type_supported, bool,
@@ -151,6 +163,7 @@ METHOD(imv_t, destroy, void,
 	private_tnc_imv_t *this)
 {
 	dlclose(this->handle);
+	this->mutex->destroy(this->mutex);
 	free(this->supported_types);
 	free(this->name);
 	free(this->path);
@@ -175,6 +188,7 @@ imv_t* tnc_imv_create(char *name, char *path)
 		},
 		.name = name,
 		.path = path,
+		.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
 	);
 
 	this->handle = dlopen(path, RTLD_LAZY);