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Annotation of embedaddon/iftop/extract.h, revision 1.1

1.1     ! misho       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: /home/pdw/vcvs/repos/iftop/extract.h,v 1.2 2003/06/06 22:42:34 pdw 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))