1 | /*
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2 | * eui64.h - EUI64 routines for IPv6CP.
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3 | *
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4 | * Copyright (c) 1999 Tommi Komulainen. All rights reserved.
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5 | *
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6 | * Redistribution and use in source and binary forms, with or without
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7 | * modification, are permitted provided that the following conditions
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8 | * are met:
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9 | *
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10 | * 1. Redistributions of source code must retain the above copyright
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11 | * notice, this list of conditions and the following disclaimer.
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12 | *
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13 | * 2. Redistributions in binary form must reproduce the above copyright
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14 | * notice, this list of conditions and the following disclaimer in
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15 | * the documentation and/or other materials provided with the
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16 | * distribution.
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17 | *
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18 | * 3. The name(s) of the authors of this software must not be used to
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19 | * endorse or promote products derived from this software without
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20 | * prior written permission.
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21 | *
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22 | * 4. Redistributions of any form whatsoever must retain the following
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23 | * acknowledgment:
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24 | * "This product includes software developed by Tommi Komulainen
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25 | * <Tommi.Komulainen@iki.fi>".
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26 | *
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27 | * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
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28 | * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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29 | * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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30 | * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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31 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
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32 | * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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33 | * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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34 | *
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35 | * $Id$
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36 | */
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37 |
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38 | #include "netif/ppp/ppp_opts.h"
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39 | #if PPP_SUPPORT && PPP_IPV6_SUPPORT /* don't build if not configured for use in lwipopts.h */
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40 |
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41 | #ifndef EUI64_H
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42 | #define EUI64_H
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43 |
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44 | #ifdef __cplusplus
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45 | extern "C" {
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46 | #endif
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47 |
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48 | /*
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49 | * @todo:
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50 | *
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51 | * Maybe this should be done by processing struct in6_addr directly...
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52 | */
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53 | typedef union
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54 | {
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55 | u8_t e8[8];
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56 | u16_t e16[4];
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57 | u32_t e32[2];
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58 | } eui64_t;
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59 |
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60 | #define eui64_iszero(e) (((e).e32[0] | (e).e32[1]) == 0)
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61 | #define eui64_equals(e, o) (((e).e32[0] == (o).e32[0]) && \
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62 | ((e).e32[1] == (o).e32[1]))
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63 | #define eui64_zero(e) (e).e32[0] = (e).e32[1] = 0;
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64 |
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65 | #define eui64_copy(s, d) memcpy(&(d), &(s), sizeof(eui64_t))
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66 |
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67 | #define eui64_magic(e) do { \
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68 | (e).e32[0] = magic(); \
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69 | (e).e32[1] = magic(); \
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70 | (e).e8[0] &= ~2; \
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71 | } while (0)
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72 | #define eui64_magic_nz(x) do { \
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73 | eui64_magic(x); \
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74 | } while (eui64_iszero(x))
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75 | #define eui64_magic_ne(x, y) do { \
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76 | eui64_magic(x); \
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77 | } while (eui64_equals(x, y))
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78 |
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79 | #define eui64_get(ll, cp) do { \
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80 | eui64_copy((*cp), (ll)); \
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81 | (cp) += sizeof(eui64_t); \
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82 | } while (0)
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83 |
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84 | #define eui64_put(ll, cp) do { \
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85 | eui64_copy((ll), (*cp)); \
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86 | (cp) += sizeof(eui64_t); \
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87 | } while (0)
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88 |
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89 | #define eui64_set32(e, l) do { \
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90 | (e).e32[0] = 0; \
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91 | (e).e32[1] = lwip_htonl(l); \
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92 | } while (0)
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93 | #define eui64_setlo32(e, l) eui64_set32(e, l)
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94 |
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95 | char *eui64_ntoa(eui64_t); /* Returns ascii representation of id */
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96 |
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97 | #ifdef __cplusplus
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98 | }
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99 | #endif
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100 |
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101 | #endif /* EUI64_H */
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102 | #endif /* PPP_SUPPORT && PPP_IPV6_SUPPORT */
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