Corrected descriptor sizes.

src/main/c/src/USB_Config_Descriptor.c

@@ -36,7 +36,8 @@ jobject wrap_usb_config_descriptor(JNIEnv *env,
     jmethodID constructor = (*env)->GetMethodID(env, cls, "<init>",
         "(Ljava/nio/ByteBuffer;)V");
     if (constructor == NULL) return NULL;
-    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor, 18);
+    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor,
+        sizeof(struct usb_config_descriptor));
     return (*env)->NewObject(env, cls, constructor, buffer);
 }
 

src/main/c/src/USB_Device_Descriptor.c

@@ -37,7 +37,8 @@ jobject wrap_usb_device_descriptor(JNIEnv *env,
     jmethodID constructor = (*env)->GetMethodID(env, cls, "<init>",
         "(Ljava/nio/ByteBuffer;)V");
     if (constructor == NULL) return NULL;
-    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor, 18);
+    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor,
+        sizeof(struct usb_device_descriptor));
     return (*env)->NewObject(env, cls, constructor, buffer);
 }
 

src/main/c/src/USB_Endpoint_Descriptor.c

@@ -35,7 +35,8 @@ jobject wrap_usb_endpoint_descriptor(JNIEnv *env,
     jmethodID constructor = (*env)->GetMethodID(env, cls, "<init>",
         "(Ljava/nio/ByteBuffer;)V");
     if (constructor == NULL) return NULL;
-    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor, 18);
+    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor,
+        sizeof(struct usb_endpoint_descriptor));
     return (*env)->NewObject(env, cls, constructor, buffer);
 }
 

src/main/c/src/USB_Interface_Descriptor.c

@@ -37,7 +37,8 @@ jobject wrap_usb_interface_descriptor(JNIEnv *env,
     jmethodID constructor = (*env)->GetMethodID(env, cls, "<init>",
         "(Ljava/nio/ByteBuffer;)V");
     if (constructor == NULL) return NULL;
-    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor, 18);
+    jobject buffer = (*env)->NewDirectByteBuffer(env, descriptor,
+        sizeof(struct usb_endpoint_descriptor));
     return (*env)->NewObject(env, cls, constructor, buffer);
 }