IPT_ICMP_INV     1843 net/ipv4/netfilter/ip_tables.c 				    !!(icmpinfo->invflags&IPT_ICMP_INV));
IPT_ICMP_INV     1851 net/ipv4/netfilter/ip_tables.c 	return (icmpinfo->invflags & ~IPT_ICMP_INV) ? -EINVAL : 0;