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, 1 insertions, 1 deletions

diff --git a/src/libsystemd/sd-netlink/netlink-socket.c b/src/libsystemd/sd-netlink/netlink-socket.c
index 8136cf36ae..db4efb58d4 100644
--- a/src/libsystemd/sd-netlink/netlink-socket.c
+++ b/src/libsystemd/sd-netlink/netlink-socket.c
@@ -253,7 +253,7 @@ int socket_read_message(sd_netlink *rtnl) {
                 }
 
                 /* check that the size matches the message type */
-                if (new_msg->nlmsg_len < NLMSG_LENGTH(nl_type->size)) {
+                if (new_msg->nlmsg_len < NLMSG_LENGTH(type_get_size(nl_type))) {
                         log_debug("sd-netlink: message larger than expected, dropping");
                         continue;
                 }