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;