IN_LOOPBACK       292 include/uapi/linux/in.h #define	IN_LOOPBACK(a)		((((long int) (a)) & 0xff000000) == 0x7f000000)
IN_LOOPBACK       292 tools/include/uapi/linux/in.h #define	IN_LOOPBACK(a)		((((long int) (a)) & 0xff000000) == 0x7f000000)