added the SocketAddress class partially done

qse/include/qse/cmn/ipad.h

@@ -30,7 +30,6 @@
 #include <qse/types.h>
 #include <qse/macros.h>
 
-typedef struct qse_ipad_t  qse_ipad_t;
 typedef struct qse_ip4ad_t qse_ip4ad_t;
 typedef struct qse_ip6ad_t qse_ip6ad_t;
 

qse/include/qse/cmn/nwad.h

@@ -247,6 +247,15 @@ QSE_EXPORT int qse_skadfamily (
 	const qse_skad_t* skad
 );
 
+
+/**
+ * The qse_skadlength() function returns the socket address size
+ * of a given address \a skad.
+ */
+QSE_EXPORT int qse_skadsize (
+	const qse_skad_t* skad
+);
+
 #if defined(__cplusplus)
 }
 #endif