NPC_IPPROTO_ICMP6
[NPC_IPPROTO_ICMP6] = "ip proto icmp6",
*features |= BIT_ULL(NPC_IPPROTO_ICMP6);
if (features & BIT_ULL(NPC_IPPROTO_ICMP6))
req->features |= BIT_ULL(NPC_IPPROTO_ICMP6);