embeddable-wg-library: add named wg_endpoint union

Define wg_endpoint as a named union to allow users of the emeddable
library to use the type in function arguments, variables etc.

Signed-off-by: Mikael Magnusson <mikma@users.sourceforge.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

contrib/embeddable-wg-library/wireguard.h

@@ -40,17 +40,19 @@ enum wg_peer_flags {
 	WGPEER_HAS_PERSISTENT_KEEPALIVE_INTERVAL = 1U << 4
 };
 
+typedef union wg_endpoint {
+	struct sockaddr addr;
+	struct sockaddr_in addr4;
+	struct sockaddr_in6 addr6;
+} wg_endpoint;
+
 typedef struct wg_peer {
 	enum wg_peer_flags flags;
 
 	wg_key public_key;
 	wg_key preshared_key;
 
-	union {
-		struct sockaddr addr;
-		struct sockaddr_in addr4;
-		struct sockaddr_in6 addr6;
-	} endpoint;
+	wg_endpoint endpoint;
 
 	struct timespec64 last_handshake_time;
 	uint64_t rx_bytes, tx_bytes;