5007142 Add ntohll and htonll to sys/byteorder.h
6717509 Need to use bswap/bswapq for byte swap of 64-bit integer on x32/x64
PSARC 2008/474

@@ -1,12 +1,11 @@
 /*
  * CDDL HEADER START
  *
  * The contents of this file are subject to the terms of the
- * Common Development and Distribution License, Version 1.0 only
- * (the "License").  You may not use this file except in compliance
- * with the License.
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
  *
  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  * or http://www.opensolaris.org/os/licensing.
  * See the License for the specific language governing permissions
  * and limitations under the License.

@@ -18,20 +17,45 @@
  * information: Portions Copyright [yyyy] [name of copyright owner]
  *
  * CDDL HEADER END
  */
 /*
- * Copyright 1991-2000, 2003 Sun Microsystems, Inc.  All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma ident   "%Z%%M% %I%     %E% SMI"
-
 #include <sys/types.h>
 #include <netinet/in.h>
 
+/*
+ * htonll(), ntohll(), htonl(), ntohl(), htons(), ntohs()
+ *
+ * On little endian machines these functions reverse the byte order of the
+ * input parameter and returns the result.  This is to convert the byte order
+ * from host byte order (little endian) to network byte order (big endian),
+ * or vice versa.
+ *
+ * On big endian machines these functions just return the input parameter,
+ * as the host byte order is the same as the network byte order (big endian).
+ */
+
+
 #ifdef  _LITTLE_ENDIAN
+uint64_t
+htonll(uint64_t in)
+{
+        return ((uint64_t)htonl((in >> 32) & 0xffffffff) |
+            ((uint64_t)htonl(in & 0xffffffff) << 32));
+}
+
+uint64_t
+ntohll(uint64_t in)
+{
+        return ((uint64_t)ntohl((in >> 32) & 0xffffffff) |
+            ((uint64_t)ntohl(in & 0xffffffff) << 32));
+}
+
 uint32_t
 htonl(uint32_t in)
 {
         uint32_t        i;
 

@@ -66,11 +90,22 @@
 }
 
 #else   /* _LITTLE_ENDIAN */
 
 #if defined(lint)
+uint64_t
+htonll(uint64_t in)
+{
+        return (in);
+}
 
+uint64_t
+ntohll(uint64_t in)
+{
+        return (in);
+}
+
 uint32_t
 htonl(uint32_t in)
 {
         return (in);
 }