IPPROTO_NONE     1402 netinet6/ip6_input.c 	case IPPROTO_NONE:
IPPROTO_NONE     1846 netinet6/ip6_mroute.c 			return (IPPROTO_NONE);
IPPROTO_NONE      239 netinet6/raw_ip6.c 		if (proto == IPPROTO_NONE)