ICMP_UNREACH_NET_PROHIB
{ "net-prohib", ICMP_UNREACH_NET_PROHIB },
case ICMP_UNREACH_NET_PROHIB:
{ "net-prohib", ICMP_UNREACH, ICMP_UNREACH_NET_PROHIB },
case ICMP_UNREACH_NET_PROHIB: /*misuse*/