DNS_OPCODE
ns_ops[DNS_OPCODE(np)],
printf("%d%s%s%s", EXTRACT_16BITS(&np->id), ns_ops[DNS_OPCODE(np)],
(DNS_OPCODE(np) == NS_NOTIFY_OP ? htons(0x400) : 0))
if (DNS_OPCODE(np) == IQUERY) {