xnu-792.22.5.tar.gz

[apple/xnu.git] / bsd / netat / ddp.h

diff --git a/bsd/netat/ddp.h b/bsd/netat/ddp.h
index 919d7337382209a7883d124948540c414d80eece..0554ddf0e4950fc4a13285967c8b9c2eb787d404 100644 (file)
--- a/bsd/netat/ddp.h
+++ b/bsd/netat/ddp.h
@@ -1,23 +1,29 @@
 /*
  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
  *
- * @APPLE_LICENSE_HEADER_START@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License").  You may not use this file except in compliance with the
- * License.  Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
+ * This file contains Original Code and/or Modifications of Original Code
+ * as defined in and that are subject to the Apple Public Source License
+ * Version 2.0 (the 'License'). You may not use this file except in
+ * compliance with the License. The rights granted to you under the License
+ * may not be used to create, or enable the creation or redistribution of,
+ * unlawful or unlicensed copies of an Apple operating system, or to
+ * circumvent, violate, or enable the circumvention or violation of, any
+ * terms of an Apple operating system software license agreement.
  * 
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * Please obtain a copy of the License at
+ * http://www.opensource.apple.com/apsl/ and read it before using this file.
+ * 
+ * The Original Code and all software distributed under the License are
+ * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
- * License for the specific language governing rights and limitations
- * under the License.
+ * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+ * Please see the License for the specific language governing rights and
+ * limitations under the License.
  * 
- * @APPLE_LICENSE_HEADER_END@
+ * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  *
@@ -62,9 +68,17 @@
 /* DDP extended header packet format */
 
 typedef struct {
-        unsigned   unused:2,
-                  hopcount:4,
-                  length:10;           /* Datagram length */
+#if BYTE_ORDER == BIG_ENDIAN
+               unsigned        unused:2,
+                           hopcount:4,         /* hop count/len high order  */
+                               length_H:2;     
+#endif
+#if BYTE_ORDER == LITTLE_ENDIAN
+               unsigned        length_H:2,
+                                       hopcount:4,
+                                       unused:2;
+#endif
+        u_char    length_L;                    /* len low order */
         ua_short   checksum;           /* Checksum */
         at_net     dst_net;            /* Destination network number */
         at_net     src_net;            /* Source network number */
@@ -72,12 +86,17 @@ typedef struct {
         at_node    src_node;           /* Source node ID */
         at_socket  dst_socket;                 /* Destination socket number */
         at_socket  src_socket;                 /* Source socket number */
-        u_char    type;                /* Protocol type */
+        u_char    type;                        /* Protocol type */
         char       data[DDP_DATA_SIZE];
 } at_ddp_t;
 
-#define        DDPLEN_ASSIGN(ddp, len)         ddp->length = len
-#define        DDPLEN_VALUE(ddp)               ddp->length
+
+#define        DDPLEN_ASSIGN(ddp, len)         \
+               ddp->length_H = 0x03 & (len >> 8); \
+               ddp->length_L = len & 0xff;
+               
+#define        DDPLEN_VALUE(ddp)                       \
+               (((u_short)ddp->length_H) << 8) + ddp->length_L
 
 /* DDP module statistics and configuration */