dnsapi: Added check for _msg_ptr vs. _ptr member in ns_msg struct.

configure

@@ -20742,6 +20742,135 @@ _ACEOF
 fi
 
 
+{ echo "$as_me:$LINENO: checking for ns_msg._msg_ptr" >&5
+echo $ECHO_N "checking for ns_msg._msg_ptr... $ECHO_C" >&6; }
+if test "${ac_cv_member_ns_msg__msg_ptr+set}" = set; then
+  echo $ECHO_N "(cached) $ECHO_C" >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+# include <arpa/nameser.h>
+#endif
+
+int
+main ()
+{
+static ns_msg ac_aggr;
+if (ac_aggr._msg_ptr)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_member_ns_msg__msg_ptr=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+# include <arpa/nameser.h>
+#endif
+
+int
+main ()
+{
+static ns_msg ac_aggr;
+if (sizeof ac_aggr._msg_ptr)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
+  (eval $ac_compile) 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } &&
+	 { ac_try='test -z "$ac_c_werror_flag"			 || test ! -s conftest.err'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; } &&
+	 { ac_try='test -s conftest.$ac_objext'
+  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); }; }; then
+  ac_cv_member_ns_msg__msg_ptr=yes
+else
+  echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_cv_member_ns_msg__msg_ptr=no
+fi
+
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ echo "$as_me:$LINENO: result: $ac_cv_member_ns_msg__msg_ptr" >&5
+echo "${ECHO_T}$ac_cv_member_ns_msg__msg_ptr" >&6; }
+if test $ac_cv_member_ns_msg__msg_ptr = yes; then
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_NS_MSG__MSG_PTR 1
+_ACEOF
+
+
+fi
+
+
 { echo "$as_me:$LINENO: checking for timezone variable" >&5
 echo $ECHO_N "checking for timezone variable... $ECHO_C" >&6; }
 if test "${ac_cv_have_timezone+set}" = set; then

configure.ac

@@ -1455,6 +1455,18 @@ AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_scope_id],,,
 #include <netinet/in.h>
 #endif])
 
+dnl Check for ns_msg ptr member
+AC_CHECK_MEMBERS([ns_msg._msg_ptr],,,
+[#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+#ifdef HAVE_ARPA_NAMESER_H
+# include <arpa/nameser.h>
+#endif])
+
 dnl Check for the external timezone variables timezone and daylight
 AC_CACHE_CHECK([for timezone variable], ac_cv_have_timezone,
                AC_TRY_LINK([#include <time.h>],[timezone;],

dlls/dnsapi/ns_parse.c

@@ -40,6 +40,12 @@ static void	setsection(ns_msg *msg, ns_sect sect);
 
 #define RETERR(err) do { return (-1); } while (0)
 
+#ifdef HAVE_NS_MSG__MSG_PTR
+# define NS_PTR(ns_msg) ((ns_msg)->_msg_ptr)
+#else
+# define NS_PTR(ns_msg) ((ns_msg)->_ptr)
+#endif
+
 /* Public. */
 
 static int
@@ -121,38 +127,38 @@ dns_ns_parserr(ns_msg *handle, ns_sect section, int rrnum, ns_rr *rr) {
 	if (rrnum < handle->_rrnum)
 		setsection(handle, section);
 	if (rrnum > handle->_rrnum) {
-		b = dns_ns_skiprr(handle->_ptr, handle->_eom, section,
+		b = dns_ns_skiprr(NS_PTR(handle), handle->_eom, section,
 			      rrnum - handle->_rrnum);
 
 		if (b < 0)
 			return (-1);
-		handle->_ptr += b;
+		NS_PTR(handle) += b;
 		handle->_rrnum = rrnum;
 	}
 
 	/* Do the parse. */
 	b = dn_expand(handle->_msg, handle->_eom,
-		      handle->_ptr, rr->name, NS_MAXDNAME);
+		      NS_PTR(handle), rr->name, NS_MAXDNAME);
 	if (b < 0)
 		return (-1);
-	handle->_ptr += b;
-	if (handle->_ptr + NS_INT16SZ + NS_INT16SZ > handle->_eom)
+	NS_PTR(handle) += b;
+	if (NS_PTR(handle) + NS_INT16SZ + NS_INT16SZ > handle->_eom)
 		RETERR(EMSGSIZE);
-	NS_GET16(rr->type, handle->_ptr);
-	NS_GET16(rr->rr_class, handle->_ptr);
+	NS_GET16(rr->type, NS_PTR(handle));
+	NS_GET16(rr->rr_class, NS_PTR(handle));
 	if (section == ns_s_qd) {
 		rr->ttl = 0;
 		rr->rdlength = 0;
 		rr->rdata = NULL;
 	} else {
-		if (handle->_ptr + NS_INT32SZ + NS_INT16SZ > handle->_eom)
+                if (NS_PTR(handle) + NS_INT32SZ + NS_INT16SZ > handle->_eom)
 			RETERR(EMSGSIZE);
-		NS_GET32(rr->ttl, handle->_ptr);
-		NS_GET16(rr->rdlength, handle->_ptr);
-		if (handle->_ptr + rr->rdlength > handle->_eom)
+		NS_GET32(rr->ttl, NS_PTR(handle));
+		NS_GET16(rr->rdlength, NS_PTR(handle));
+		if (NS_PTR(handle) + rr->rdlength > handle->_eom)
 			RETERR(EMSGSIZE);
-		rr->rdata = handle->_ptr;
-		handle->_ptr += rr->rdlength;
+		rr->rdata = NS_PTR(handle);
+		NS_PTR(handle) += rr->rdlength;
 	}
 	if (++handle->_rrnum > handle->_counts[(int)section])
 		setsection(handle, (ns_sect)((int)section + 1));
@@ -168,9 +174,9 @@ setsection(ns_msg *msg, ns_sect sect) {
 	msg->_sect = sect;
 	if (sect == ns_s_max) {
 		msg->_rrnum = -1;
-		msg->_ptr = NULL;
+		NS_PTR(msg) = NULL;
 	} else {
 		msg->_rrnum = 0;
-		msg->_ptr = msg->_sections[(int)sect];
+		NS_PTR(msg) = msg->_sections[(int)sect];
 	}
 }

include/config.h.in

@@ -476,6 +476,9 @@
 /* Define to 1 if you have the <net/route.h> header file. */
 #undef HAVE_NET_ROUTE_H
 
+/* Define to 1 if `_msg_ptr' is member of `ns_msg'. */
+#undef HAVE_NS_MSG__MSG_PTR
+
 /* Define to 1 if the system has the type `off_t'. */
 #undef HAVE_OFF_T