| /* |
| * Copyright (c) 1992, 1993, 1994, 1995, 1996 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that: (1) source code distributions |
| * retain the above copyright notice and this paragraph in its entirety, (2) |
| * distributions including binary code include the above copyright notice and |
| * this paragraph in its entirety in the documentation or other materials |
| * provided with the distribution, and (3) all advertising materials mentioning |
| * features or use of this software display the following acknowledgement: |
| * ``This product includes software developed by the University of California, |
| * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
| * the University nor the names of its contributors may be used to endorse |
| * or promote products derived from this software without specific prior |
| * written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
| * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
| * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * @(#) $Header: /tcpdump/master/tcpdump/extract.h,v 1.15 1999-10-07 23:47:10 mcr Exp $ (LBL) |
| */ |
| |
| /* Network to host order macros */ |
| |
| #ifdef LBL_ALIGN |
| #define EXTRACT_16BITS(p) \ |
| ((u_short)*((u_char *)(p) + 0) << 8 | \ |
| (u_short)*((u_char *)(p) + 1)) |
| #define EXTRACT_32BITS(p) \ |
| ((u_int32_t)*((u_char *)(p) + 0) << 24 | \ |
| (u_int32_t)*((u_char *)(p) + 1) << 16 | \ |
| (u_int32_t)*((u_char *)(p) + 2) << 8 | \ |
| (u_int32_t)*((u_char *)(p) + 3)) |
| #else |
| #define EXTRACT_16BITS(p) \ |
| ((u_short)ntohs(*(u_short *)(p))) |
| #define EXTRACT_32BITS(p) \ |
| ((u_int32_t)ntohl(*(u_int32_t *)(p))) |
| #endif |
| |
| #define EXTRACT_24BITS(p) \ |
| ((u_int32_t)*((u_char *)(p) + 0) << 16 | \ |
| (u_int32_t)*((u_char *)(p) + 1) << 8 | \ |
| (u_int32_t)*((u_char *)(p) + 2)) |
| |
| /* Little endian protocol host order macros */ |
| |
| #define EXTRACT_LE_8BITS(p) (*(p)) |
| #define EXTRACT_LE_16BITS(p) \ |
| ((u_short)*((u_char *)(p) + 1) << 8 | \ |
| (u_short)*((u_char *)(p) + 0)) |
| #define EXTRACT_LE_32BITS(p) \ |
| ((u_int32_t)*((u_char *)(p) + 3) << 24 | \ |
| (u_int32_t)*((u_char *)(p) + 2) << 16 | \ |
| (u_int32_t)*((u_char *)(p) + 1) << 8 | \ |
| (u_int32_t)*((u_char *)(p) + 0)) |