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iftop

    1: /*
    2:  * Copyright (c) 1992, 1993, 1994, 1995, 1996
    3:  *	The Regents of the University of California.  All rights reserved.
    4:  *
    5:  * Redistribution and use in source and binary forms, with or without
    6:  * modification, are permitted provided that: (1) source code distributions
    7:  * retain the above copyright notice and this paragraph in its entirety, (2)
    8:  * distributions including binary code include the above copyright notice and
    9:  * this paragraph in its entirety in the documentation or other materials
   10:  * provided with the distribution, and (3) all advertising materials mentioning
   11:  * features or use of this software display the following acknowledgement:
   12:  * ``This product includes software developed by the University of California,
   13:  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
   14:  * the University nor the names of its contributors may be used to endorse
   15:  * or promote products derived from this software without specific prior
   16:  * written permission.
   17:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
   18:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
   19:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
   20:  *
   21:  * @(#) $Header: /usr/local/www/users/anoncvs/cvs/embedaddon/iftop/extract.h,v 1.1.1.1 2012/02/21 16:57:34 misho Exp $ (LBL)
   22:  */
   23: 
   24: /* Network to host order macros */
   25: 
   26: #ifdef LBL_ALIGN
   27: #define EXTRACT_16BITS(p) \
   28: 	((u_int16_t)*((const u_int8_t *)(p) + 0) << 8 | \
   29: 	(u_int16_t)*((const u_int8_t *)(p) + 1))
   30: #define EXTRACT_32BITS(p) \
   31: 	((u_int32_t)*((const u_int8_t *)(p) + 0) << 24 | \
   32: 	(u_int32_t)*((const u_int8_t *)(p) + 1) << 16 | \
   33: 	(u_int32_t)*((const u_int8_t *)(p) + 2) << 8 | \
   34: 	(u_int32_t)*((const u_int8_t *)(p) + 3))
   35: #else
   36: #define EXTRACT_16BITS(p) \
   37: 	((u_int16_t)ntohs(*(const u_int16_t *)(p)))
   38: #define EXTRACT_32BITS(p) \
   39: 	((u_int32_t)ntohl(*(const u_int32_t *)(p)))
   40: #endif
   41: 
   42: #define EXTRACT_24BITS(p) \
   43: 	((u_int32_t)*((const u_int8_t *)(p) + 0) << 16 | \
   44: 	(u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
   45: 	(u_int32_t)*((const u_int8_t *)(p) + 2))
   46: 
   47: /* Little endian protocol host order macros */
   48: 
   49: #define EXTRACT_LE_8BITS(p) (*(p))
   50: #define EXTRACT_LE_16BITS(p) \
   51: 	((u_int16_t)*((const u_int8_t *)(p) + 1) << 8 | \
   52: 	(u_int16_t)*((const u_int8_t *)(p) + 0))
   53: #define EXTRACT_LE_32BITS(p) \
   54: 	((u_int32_t)*((const u_int8_t *)(p) + 3) << 24 | \
   55: 	(u_int32_t)*((const u_int8_t *)(p) + 2) << 16 | \
   56: 	(u_int32_t)*((const u_int8_t *)(p) + 1) << 8 | \
   57: 	(u_int32_t)*((const u_int8_t *)(p) + 0))