構造体定義書

typedef struct

No.	名称	属性	説明
1	HEADER
	id	unsigned	query identification number
	qr	unsigned	response flag
	opcode	unsigned	purpose of message
	aa	unsigned	authoritive answer
	tc	unsigned	truncated message
	rd	unsigned	recursion desired
	ra	unsigned	recursion available
	pr	unsigned	primary server req'd (!standard)
	unused	unsigned	unused bits (MBZ as of 4.9.3a3)
	rcode	unsigned	response code
	rd	unsigned	recursion desired
	tc	unsigned	truncated message
	aa	unsigned	authoritive answer
	opcode	unsigned	purpose of message
	qr	unsigned	response flag
	rcode	unsigned	response code
	unused	unsigned	unused bits (MBZ as of 4.9.3a3)
	pr	unsigned	primary server req'd (!standard)
	ra	unsigned	recursion available
	qdcount	unsigned	number of question entries
	ancount	unsigned	number of answer entries
	nscount	unsigned	number of authority entries
	arcount	unsigned	number of resource entries

HEADER