Annotation of embedaddon/iftop/extract.h, revision 1.1.1.1
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))
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