sd-netlink: make NLType internal

If we extend NLType to support arrays and further extended types, we
really want to avoid hard-coding the type-layout outside of
netlink-types.c. We already avoid accessing nl_type->type_system outside
of netlink-types.c, extend this to also avoid accessing any other fields.

Provide accessor functions for nl_type->type and nl_type->size and then
move NLType away from the type-system header.

With this in place, follow-up patches can safely turn "type_system" and
"type_system_union" into a real "union { }", and then add another type for
arrays.

1 files changed, 2 insertions, 7 deletions

diff --git a/src/libsystemd/sd-netlink/netlink-types.h b/src/libsystemd/sd-netlink/netlink-types.h
index 74a59bb7c2..cb6a78fb3e 100644
--- a/src/libsystemd/sd-netlink/netlink-types.h
+++ b/src/libsystemd/sd-netlink/netlink-types.h
@@ -58,13 +58,8 @@ struct NLTypeSystem {
         const NLType *types;
 };
 
-struct NLType {
-        uint16_t type;
-        size_t size;
-        const NLTypeSystem *type_system;
-        const NLTypeSystemUnion *type_system_union;
-};
-
+uint16_t type_get_type(const NLType *type);
+size_t type_get_size(const NLType *type);
 void type_get_type_system(const NLType *type, const NLTypeSystem **ret);
 void type_get_type_system_union(const NLType *type, const NLTypeSystemUnion **ret);
 int type_system_get_type(const NLTypeSystem *type_system, const NLType **ret, uint16_t type);