-#define BSD_AFNUM_INET 2
-#define BSD_AFNUM_NS 6 /* XEROX NS protocols */
-#define BSD_AFNUM_ISO 7
-#define BSD_AFNUM_APPLETALK 16
-#define BSD_AFNUM_IPX 23
-#define BSD_AFNUM_INET6_BSD 24 /* OpenBSD (and probably NetBSD), BSD/OS */
-#define BSD_AFNUM_INET6_FREEBSD 28
-#define BSD_AFNUM_INET6_DARWIN 30
+#define BSD_AF_INET 2
+#define BSD_AF_NS 6 /* XEROX NS protocols */
+#define BSD_AF_ISO 7
+#define BSD_AF_APPLETALK 16
+#define BSD_AF_IPX 23
+#define BSD_AF_INET6_BSD 24 /* NetBSD, OpenBSD, BSD/OS, Npcap */
+#define BSD_AF_INET6_FREEBSD 28 /* FreeBSD */
+#define BSD_AF_INET6_DARWIN 30 /* macOS, iOS, other Darwin-based OSes */