IPPROTO_IPIP       32 include/uapi/linux/in.h   IPPROTO_IPIP = 4,		/* IPIP tunnels (older KA9Q tunnels use 94) */
IPPROTO_IPIP       33 include/uapi/linux/in.h #define IPPROTO_IPIP		IPPROTO_IPIP
IPPROTO_IPIP       33 include/uapi/linux/in.h #define IPPROTO_IPIP		IPPROTO_IPIP