Commit f6da5743 authored by Gisle Vanem's avatar Gisle Vanem
Browse files

Support big-endian machines.

parent b09d5c31

ares/ares_dns.h

+7 −0
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ 
#ifndef ARES__DNS_H

#define ARES__DNS_H



#if 0

#define DNS__16BIT(p)                   (((p)[0] << 8) | (p)[1])

#define DNS__32BIT(p)                   (((p)[0] << 24) | ((p)[1] << 16) | \

                                         ((p)[2] << 8) | (p)[3])
@@ -27,6 +28,12 @@ 
                                         ((p)[1] = ((v) >> 16) & 0xff), \

                                         ((p)[2] = ((v) >> 8) & 0xff), \

                                         ((p)[3] = (v) & 0xff))

#else  /* big-endian aware versions */

#define DNS__16BIT(p)                   ntohs(*(unsigned short*)(p))

#define DNS__32BIT(p)                   ntohl(*(unsigned long*)(p))

#define DNS__SET16BIT(p, v)             *(unsigned short*)(p) = htons(v)

#define DNS__SET32BIT(p, v)             *(unsigned long*)(p) = htonl(v)

#endif



/* Macros for parsing a DNS header */

#define DNS_HEADER_QID(h)               DNS__16BIT(h)