AsyncResolverDNSMacros.h File Reference

Macros for manipulating DNS queries. More...

Go to the source code of this file.

Defines
#define	DNS__16BIT(p)   (((p)[0] << 8) | (p)[1])
#define	DNS__32BIT(p)
#define	DNS__SET16BIT(p, v)
#define	DNS__SET32BIT(p, v)
#define	DNS_HEADER_QID(h)   DNS__16BIT(h)
#define	DNS_HEADER_QR(h)   (((h)[2] >> 7) & 0x1)
#define	DNS_HEADER_OPCODE(h)   (((h)[2] >> 3) & 0xf)
#define	DNS_HEADER_AA(h)   (((h)[2] >> 2) & 0x1)
#define	DNS_HEADER_TC(h)   (((h)[2] >> 1) & 0x1)
#define	DNS_HEADER_RD(h)   ((h)[2] & 0x1)
#define	DNS_HEADER_RA(h)   (((h)[3] >> 7) & 0x1)
#define	DNS_HEADER_Z(h)   (((h)[3] >> 4) & 0x7)
#define	DNS_HEADER_RCODE(h)   ((h)[3] & 0xf)
#define	DNS_HEADER_QDCOUNT(h)   DNS__16BIT((h) + 4)
#define	DNS_HEADER_ANCOUNT(h)   DNS__16BIT((h) + 6)
#define	DNS_HEADER_NSCOUNT(h)   DNS__16BIT((h) + 8)
#define	DNS_HEADER_ARCOUNT(h)   DNS__16BIT((h) + 10)
#define	DNS_HEADER_SET_QID(h, v)   DNS__SET16BIT(h, v)
#define	DNS_HEADER_SET_QR(h, v)   ((h)[2] |= (((v) & 0x1) << 7))
#define	DNS_HEADER_SET_OPCODE(h, v)   ((h)[2] |= (((v) & 0xf) << 3))
#define	DNS_HEADER_SET_AA(h, v)   ((h)[2] |= (((v) & 0x1) << 2))
#define	DNS_HEADER_SET_TC(h, v)   ((h)[2] |= (((v) & 0x1) << 1))
#define	DNS_HEADER_SET_RD(h, v)   ((h)[2] |= (((v) & 0x1)))
#define	DNS_HEADER_SET_RA(h, v)   ((h)[3] |= (((v) & 0x1) << 7))
#define	DNS_HEADER_SET_Z(h, v)   ((h)[3] |= (((v) & 0x7) << 4))
#define	DNS_HEADER_SET_RCODE(h, v)   ((h)[3] |= (((v) & 0xf)))
#define	DNS_HEADER_SET_QDCOUNT(h, v)   DNS__SET16BIT((h) + 4, v)
#define	DNS_HEADER_SET_ANCOUNT(h, v)   DNS__SET16BIT((h) + 6, v)
#define	DNS_HEADER_SET_NSCOUNT(h, v)   DNS__SET16BIT((h) + 8, v)
#define	DNS_HEADER_SET_ARCOUNT(h, v)   DNS__SET16BIT((h) + 10, v)
#define	DNS_QUESTION_TYPE(q)   DNS__16BIT(q)
#define	DNS_QUESTION_CLASS(q)   DNS__16BIT((q) + 2)
#define	DNS_QUESTION_SET_TYPE(q, v)   DNS__SET16BIT(q, v)
#define	DNS_QUESTION_SET_CLASS(q, v)   DNS__SET16BIT((q) + 2, v)
#define	DNS_RR_TYPE(r)   DNS__16BIT(r)
#define	DNS_RR_CLASS(r)   DNS__16BIT((r) + 2)
#define	DNS_RR_TTL(r)   DNS__32BIT((r) + 4)
#define	DNS_RR_LEN(r)   DNS__16BIT((r) + 8)
#define	DNS_RR_SET_TYPE(r)   DNS__SET16BIT(r, v)
#define	DNS_RR_SET_CLASS(r)   DNS__SET16BIT((r) + 2, v)
#define	DNS_RR_SET_TTL(r)   DNS__SET32BIT((r) + 4, v)
#define	DNS_RR_SET_LEN(r)   DNS__SET16BIT((r) + 8, v)

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Detailed Description

Macros for manipulating DNS queries.

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Define Documentation

#define DNS__32BIT (  p   )

Value: (((p)[0] << 24) | ((p)[1] << 16) | \ ((p)[2] << 8) | (p)[3])

#define DNS__SET16BIT (  p, v   )

Value: (((p)[0] = (unsigned char)((v) >> 8) & 0xff), \ ((p)[1] = (unsigned char)(v) & 0xff))

#define DNS__SET32BIT (  p, v   )

Value: (((p)[0] = (unsigned char)((v) >> 24) & 0xff), \ ((p)[1] = (unsigned char)((v) >> 16) & 0xff), \ ((p)[2] = (unsigned char)((v) >> 8) & 0xff), \ ((p)[3] = (unsigned char)(v) & 0xff))

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