networkd: rework headers to avoid circular includes

Header files were organized in a way where the includer would add various
typedefs used by the includee before including it, resulting in a tangled
web of dependencies between files.

Replace this with the following logic:

          networkd.h
         /          \
networkd-link.h      \
networkd-ipv4ll.h--\__\
networkd-fdb.h         \
networkd-network.h    netword-netdev-*.h
networkd-route.h           \
                      networkd-netdev.h

If a pointer to a structure defined in a different header file is needed,
use a typedef line instead of including the whole header.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/network/networkd-netdev-dummy.h b/src/network/networkd-netdev-dummy.h
index 42da62ebe4..efe302267e 100644
--- a/src/network/networkd-netdev-dummy.h
+++ b/src/network/networkd-netdev-dummy.h
@@ -19,12 +19,11 @@
   along with systemd; If not, see <http://www.gnu.org/licenses/>.
 ***/
 
-typedef struct Dummy Dummy;
-
 #include "networkd-netdev.h"
 
-struct Dummy {
+typedef struct Dummy {
         NetDev meta;
-};
+} Dummy;
 
+DEFINE_NETDEV_CAST(DUMMY, Dummy);
 extern const NetDevVTable dummy_vtable;