1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
* Copyright (C) 2008-2014 Tobias Brunner
* Copyright (C) 2008 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
/**
* @defgroup utils_i utils
* @{ @ingroup utils
*/
#ifndef UTILS_H_
#define UTILS_H_
#include <sys/types.h>
#include <stdlib.h>
#include <stddef.h>
#include <sys/time.h>
#include <string.h>
#ifdef WIN32
# include "compat/windows.h"
#else
# define _GNU_SOURCE
# include <arpa/inet.h>
# include <sys/socket.h>
# include <netdb.h>
# include <netinet/in.h>
# include <sched.h>
# include <poll.h>
#endif
#include "utils/types.h"
#include "enum.h"
#include "utils/atomics.h"
#include "utils/align.h"
#include "utils/byteorder.h"
#include "utils/string.h"
#include "utils/memory.h"
#include "utils/strerror.h"
#include "utils/status.h"
#include "utils/object.h"
#include "utils/path.h"
#include "utils/time.h"
#include "utils/tty.h"
#ifdef __APPLE__
# include "compat/apple.h"
#endif
/**
* Initialize utility functions
*/
void utils_init();
/**
* Deinitialize utility functions
*/
void utils_deinit();
/**
* strongSwan program return codes
*/
#define SS_RC_LIBSTRONGSWAN_INTEGRITY 64
#define SS_RC_DAEMON_INTEGRITY 65
#define SS_RC_INITIALIZATION_FAILED 66
#define SS_RC_FIRST SS_RC_LIBSTRONGSWAN_INTEGRITY
#define SS_RC_LAST SS_RC_INITIALIZATION_FAILED
/**
* Number of bits in a byte
*/
#define BITS_PER_BYTE 8
/**
* Default length for various auxiliary text buffers
*/
#define BUF_LEN 512
/**
* Build assertion macro for integer expressions, evaluates to 0
*/
#define BUILD_ASSERT(x) (sizeof(char[(x) ? 0 : -1]))
/**
* Build time check to assert a is an array, evaluates to 0
*
* The address of an array element has a pointer type, which is not compatible
* to the array type.
*/
#define BUILD_ASSERT_ARRAY(a) \
BUILD_ASSERT(!__builtin_types_compatible_p(typeof(a), typeof(&(a)[0])))
/**
* Debug macro to follow control flow
*/
#define POS printf("%s, line %d\n", __FILE__, __LINE__)
/**
* This macro allows counting the number of arguments passed to a macro.
* Combined with the VA_ARGS_DISPATCH() macro this can be used to implement
* macro overloading based on the number of arguments.
* 0 to 10 arguments are currently supported.
*/
#define VA_ARGS_NUM(...) _VA_ARGS_NUM(0,##__VA_ARGS__,10,9,8,7,6,5,4,3,2,1,0)
#define _VA_ARGS_NUM(_0,_1,_2,_3,_4,_5,_6,_7,_8,_9,_10,NUM,...) NUM
/**
* This macro can be used to dispatch a macro call based on the number of given
* arguments, for instance:
*
* @code
* #define MY_MACRO(...) VA_ARGS_DISPATCH(MY_MACRO, __VA_ARGS__)(__VA_ARGS__)
* #define MY_MACRO1(arg) one_arg(arg)
* #define MY_MACRO2(arg1,arg2) two_args(arg1,arg2)
* @endcode
*
* MY_MACRO() can now be called with either one or two arguments, which will
* resolve to one_arg(arg) or two_args(arg1,arg2), respectively.
*/
#define VA_ARGS_DISPATCH(func, ...) _VA_ARGS_DISPATCH(func, VA_ARGS_NUM(__VA_ARGS__))
#define _VA_ARGS_DISPATCH(func, num) __VA_ARGS_DISPATCH(func, num)
#define __VA_ARGS_DISPATCH(func, num) func ## num
/**
* Macro to allocate a sized type.
*/
#define malloc_thing(thing) ((thing*)malloc(sizeof(thing)))
/**
* Get the number of elements in an array
*/
#define countof(array) (sizeof(array)/sizeof((array)[0]) \
+ BUILD_ASSERT_ARRAY(array))
/**
* Ignore result of functions tagged with warn_unused_result attributes
*/
#define ignore_result(call) { if(call){}; }
/**
* Portable function to wait for SIGINT/SIGTERM (or equivalent).
*/
void wait_sigint();
#ifndef HAVE_CLOSEFROM
/**
* Close open file descriptors greater than or equal to lowfd.
*
* @param lowfd start closing file descriptors from here
*/
void closefrom(int lowfd);
#endif
/**
* returns null
*/
void *return_null();
/**
* No-Operation function
*/
void nop();
/**
* returns TRUE
*/
bool return_true();
/**
* returns FALSE
*/
bool return_false();
#endif /** UTILS_H_ @}*/
|
