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authorYu Jiung <jiung.yu@samsung.com>2016-11-09 02:15:33 (GMT)
committerYu Jiung <jiung.yu@samsung.com>2016-11-09 02:15:43 (GMT)
commitb6627e2c19506bd30328969ea8aab73fa0945f36 (patch)
tree24b768763efadd60f318873601e58dd98fe9714c /ares_dns.h
parentb8e6c26b7b9608dffc84645f17fe4cf534af18dd (diff)
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Imported Upstream version 1.10.0refs/changes/17/96417/1
Change-Id: Ic7f3b0ad7dca62abe4cfa642a5eb5e190eb7a8c9
Diffstat (limited to 'ares_dns.h')
-rw-r--r--ares_dns.h35
1 files changed, 24 insertions, 11 deletions
diff --git a/ares_dns.h b/ares_dns.h
index 6893c02..79f993b 100644
--- a/ares_dns.h
+++ b/ares_dns.h
@@ -1,5 +1,7 @@
+#ifndef HEADER_CARES_DNS_H
+#define HEADER_CARES_DNS_H
-/* Copyright 1998 by the Massachusetts Institute of Technology.
+/* Copyright 1998, 2011 by the Massachusetts Institute of Technology.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
@@ -14,12 +16,23 @@
* without express or implied warranty.
*/
-#ifndef ARES__DNS_H
-#define ARES__DNS_H
+/*
+ * Macro DNS__16BIT reads a network short (16 bit) given in network
+ * byte order, and returns its value as an unsigned short.
+ */
+#define DNS__16BIT(p) ((unsigned short)((unsigned int) 0xffff & \
+ (((unsigned int)((unsigned char)(p)[0]) << 8U) | \
+ ((unsigned int)((unsigned char)(p)[1])))))
-#define DNS__16BIT(p) (((p)[0] << 8) | (p)[1])
-#define DNS__32BIT(p) (((p)[0] << 24) | ((p)[1] << 16) | \
- ((p)[2] << 8) | (p)[3])
+/*
+ * Macro DNS__32BIT reads a network long (32 bit) given in network
+ * byte order, and returns its value as an unsigned int.
+ */
+#define DNS__32BIT(p) ((unsigned int) \
+ (((unsigned int)((unsigned char)(p)[0]) << 24U) | \
+ ((unsigned int)((unsigned char)(p)[1]) << 16U) | \
+ ((unsigned int)((unsigned char)(p)[2]) << 8U) | \
+ ((unsigned int)((unsigned char)(p)[3]))))
#define DNS__SET16BIT(p, v) (((p)[0] = (unsigned char)(((v) >> 8) & 0xff)), \
((p)[1] = (unsigned char)((v) & 0xff)))
@@ -82,9 +95,9 @@
#define DNS_RR_LEN(r) DNS__16BIT((r) + 8)
/* Macros for constructing the fixed part of a DNS resource record */
-#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)
+#define DNS_RR_SET_TYPE(r, v) DNS__SET16BIT(r, v)
+#define DNS_RR_SET_CLASS(r, v) DNS__SET16BIT((r) + 2, v)
+#define DNS_RR_SET_TTL(r, v) DNS__SET32BIT((r) + 4, v)
+#define DNS_RR_SET_LEN(r, v) DNS__SET16BIT((r) + 8, v)
-#endif /* ARES__DNS_H */
+#endif /* HEADER_CARES_DNS_H */