/* * 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 1.15.1.1 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))