03fd74b2905bec9e35f06547d8f2e85f70931cb9
[strongswan.git] / Source / charon / definitions.h
1 /**
2 * @file definitions.h
3 *
4 * @brief general purpose definitions and macros
5 *
6 */
7
8 /*
9 * Copyright (C) 2005 Jan Hutter, Martin Willi
10 * Hochschule fuer Technik Rapperswil
11 * Copyright (C) 1998, 1999 D. Hugh Redelmeier. (Endian stuff)
12 *
13 * This program is free software; you can redistribute it and/or modify it
14 * under the terms of the GNU General Public License as published by the
15 * Free Software Foundation; either version 2 of the License, or (at your
16 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
17 *
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
20 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
21 * for more details.
22 */
23
24 #ifndef DEFINITIONS_H_
25 #define DEFINITIONS_H_
26
27
28
29 /* stolen from strongswan */
30 #if linux
31 # if defined(i386) && !defined(__i386__)
32 # define __i386__ 1
33 # define MYHACKFORTHIS 1
34 # endif
35 # include <endian.h>
36 # ifdef MYHACKFORTHIS
37 # undef __i386__
38 # undef MYHACKFORTHIS
39 # endif
40 #elif !(defined(BIG_ENDIAN) && defined(LITTLE_ENDIAN) && defined(BYTE_ORDER))
41 /* we don't know how to do this, so we require the macros to be defined
42 * with compiler flags:
43 * -DBIG_ENDIAN=4321 -DLITTLE_ENDIAN=1234 -DBYTE_ORDER=BIG_ENDIAN
44 * or -DBIG_ENDIAN=4321 -DLITTLE_ENDIAN=1234 -DBYTE_ORDER=LITTLE_ENDIAN
45 * Thse match the GNU definitions
46 */
47 # include <sys/endian.h>
48 #endif
49
50 #ifndef BIG_ENDIAN
51 #error "BIG_ENDIAN must be defined"
52 #endif
53
54 #ifndef LITTLE_ENDIAN
55 #error "LITTLE_ENDIAN must be defined"
56 #endif
57
58 #ifndef BYTE_ORDER
59 #error "BYTE_ORDER must be defined"
60 #endif
61
62 /**
63 * Doxygen namespace support
64 */
65
66
67 /**
68 * @addtogroup transforms
69 *
70 * Transform algorithms of different kind.
71 */
72
73 /**
74 * @addtogroup prfs
75 *
76 * Pseudo random functions, generate a lot of pseudo
77 * randomness using random numbers.
78 *
79 * @ingroup transforms
80 */
81
82 /**
83 * @addtogroup signers
84 *
85 * Symmetric signing algorithms, used to ensure
86 * message integrity.
87 *
88 * @ingroup transforms
89 */
90
91 /**
92 * @addtogroup crypters
93 *
94 * Symmetric encryption algorithms, used to en-
95 * and decrypt.
96 *
97 * @ingroup transforms
98 */
99
100 /**
101 * @addtogroup hashers
102 *
103 * Hash algorithms
104 *
105 * @ingroup transforms
106 */
107
108 /**
109 * @addtogroup utils
110 *
111 * Generic helper classes.
112 */
113
114 /**
115 * @addtogroup threads
116 *
117 * Threaded classes, which will do their
118 * job alone.
119 */
120
121
122
123 /**
124 * macro gives back larger of two values
125 */
126 #define max(x,y) (x > y ? x : y)
127
128
129 /**
130 * macro gives back smaller of two values
131 */
132 #define min(x,y) (x < y ? x : y)
133
134
135 /**
136 * mapping entry which defines the end of a mapping_t array
137 */
138 #define MAPPING_END (-1)
139
140 typedef struct mapping_t mapping_t;
141
142 /**
143 * @brief mapping entry, where enum-to-string mappings are stored.
144 */
145 struct mapping_t
146 {
147 /**
148 * enumeration value
149 */
150 int value;
151 /**
152 * mapped string
153 */
154 char *string;
155 };
156
157
158 /**
159 * @brief find a mapping_string in the mapping[]
160 *
161 * @param mappings mappings array
162 * @param value enum-value to get the string from
163 *
164 */
165 char *mapping_find(mapping_t *mappings, int value);
166
167
168 /**
169 * Default random device used when no device is given.
170 */
171 #define DEFAULT_RANDOM_DEVICE "/dev/random"
172
173 /**
174 * Pseudo random device used when no device is given.
175 */
176 #define DEFAULT_PSEUDO_RANDOM_DEVICE "/dev/urandom"
177
178
179 #endif /*DEFINITIONS_H_*/