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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
|
/*
* Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _EVENT_UTIL_INTERNAL_H
#define _EVENT_UTIL_INTERNAL_H
#include "event2/event-config.h"
#include <errno.h>
/* For EVUTIL_ASSERT */
#include "log-internal.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef _EVENT_HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif
#include "event2/util.h"
#include "ipv6-internal.h"
#ifdef __cplusplus
extern "C" {
#endif
/* If we need magic to say "inline", get it for free internally. */
#ifdef _EVENT_inline
#define inline _EVENT_inline
#endif
#ifdef _EVENT___func__
#define __func__ _EVENT___func__
#endif
/* A good no-op to use in macro definitions. */
#define _EVUTIL_NIL_STMT ((void)0)
/* A no-op that tricks the compiler into thinking a condition is used while
* definitely not making any code for it. Used to compile out asserts while
* avoiding "unused variable" warnings. The "!" forces the compiler to
* do the sizeof() on an int, in case "condition" is a bitfield value.
*/
#define _EVUTIL_NIL_CONDITION(condition) do { \
(void)sizeof(!(condition)); \
} while(0)
/* Internal use only: macros to match patterns of error codes in a
cross-platform way. We need these macros because of two historical
reasons: first, nonblocking IO functions are generally written to give an
error on the "blocked now, try later" case, so sometimes an error from a
read, write, connect, or accept means "no error; just wait for more
data," and we need to look at the error code. Second, Windows defines
a different set of error codes for sockets. */
#ifndef WIN32
/* True iff e is an error that means a read/write operation can be retried. */
#define EVUTIL_ERR_RW_RETRIABLE(e) \
((e) == EINTR || (e) == EAGAIN)
/* True iff e is an error that means an connect can be retried. */
#define EVUTIL_ERR_CONNECT_RETRIABLE(e) \
((e) == EINTR || (e) == EINPROGRESS)
/* True iff e is an error that means a accept can be retried. */
#define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \
((e) == EINTR || (e) == EAGAIN || (e) == ECONNABORTED)
/* True iff e is an error that means the connection was refused */
#define EVUTIL_ERR_CONNECT_REFUSED(e) \
((e) == ECONNREFUSED)
#else
#define EVUTIL_ERR_RW_RETRIABLE(e) \
((e) == WSAEWOULDBLOCK || \
(e) == WSAEINTR)
#define EVUTIL_ERR_CONNECT_RETRIABLE(e) \
((e) == WSAEWOULDBLOCK || \
(e) == WSAEINTR || \
(e) == WSAEINPROGRESS || \
(e) == WSAEINVAL)
#define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \
EVUTIL_ERR_RW_RETRIABLE(e)
#define EVUTIL_ERR_CONNECT_REFUSED(e) \
((e) == WSAECONNREFUSED)
#endif
#ifdef _EVENT_socklen_t
#define socklen_t _EVENT_socklen_t
#endif
/* Arguments for shutdown() */
#ifdef SHUT_RD
#define EVUTIL_SHUT_RD SHUT_RD
#else
#define EVUTIL_SHUT_RD 0
#endif
#ifdef SHUT_WR
#define EVUTIL_SHUT_WR SHUT_WR
#else
#define EVUTIL_SHUT_WR 1
#endif
#ifdef SHUT_BOTH
#define EVUTIL_SHUT_BOTH SHUT_BOTH
#else
#define EVUTIL_SHUT_BOTH 2
#endif
/* Locale-independent replacements for some ctypes functions. Use these
* when you care about ASCII's notion of character types, because you are about
* to send those types onto the wire.
*/
int EVUTIL_ISALPHA(char c);
int EVUTIL_ISALNUM(char c);
int EVUTIL_ISSPACE(char c);
int EVUTIL_ISDIGIT(char c);
int EVUTIL_ISXDIGIT(char c);
int EVUTIL_ISPRINT(char c);
int EVUTIL_ISLOWER(char c);
int EVUTIL_ISUPPER(char c);
char EVUTIL_TOUPPER(char c);
char EVUTIL_TOLOWER(char c);
/** Helper macro. If we know that a given pointer points to a field in a
structure, return a pointer to the structure itself. Used to implement
our half-baked C OO. Example:
struct subtype {
int x;
struct supertype common;
int y;
};
...
void fn(struct supertype *super) {
struct subtype *sub = EVUTIL_UPCAST(super, struct subtype, common);
...
}
*/
#define EVUTIL_UPCAST(ptr, type, field) \
((type *)(((char*)(ptr)) - evutil_offsetof(type, field)))
/* As open(pathname, flags, mode), except that the file is always opened with
* the close-on-exec flag set. (And the mode argument is mandatory.)
*/
int evutil_open_closeonexec(const char *pathname, int flags, unsigned mode);
int evutil_read_file(const char *filename, char **content_out, size_t *len_out,
int is_binary);
int evutil_socket_connect(evutil_socket_t *fd_ptr, struct sockaddr *sa, int socklen);
int evutil_socket_finished_connecting(evutil_socket_t fd);
int evutil_ersatz_socketpair(int, int , int, evutil_socket_t[]);
int evutil_resolve(int family, const char *hostname, struct sockaddr *sa,
ev_socklen_t *socklen, int port);
const char *evutil_getenv(const char *name);
long _evutil_weakrand(void);
/* Evaluates to the same boolean value as 'p', and hints to the compiler that
* we expect this value to be false. */
#if defined(__GNUC__) && __GNUC__ >= 3 /* gcc 3.0 or later */
#define EVUTIL_UNLIKELY(p) __builtin_expect(!!(p),0)
#else
#define EVUTIL_UNLIKELY(p) (p)
#endif
/* Replacement for assert() that calls event_errx on failure. */
#ifdef NDEBUG
#define EVUTIL_ASSERT(cond) _EVUTIL_NIL_CONDITION(cond)
#define EVUTIL_FAILURE_CHECK(cond) 0
#else
#define EVUTIL_ASSERT(cond) \
do { \
if (EVUTIL_UNLIKELY(!(cond))) { \
event_errx(_EVENT_ERR_ABORT, \
"%s:%d: Assertion %s failed in %s", \
__FILE__,__LINE__,#cond,__func__); \
/* In case a user-supplied handler tries to */ \
/* return control to us, log and abort here. */ \
(void)fprintf(stderr, \
"%s:%d: Assertion %s failed in %s", \
__FILE__,__LINE__,#cond,__func__); \
abort(); \
} \
} while (0)
#define EVUTIL_FAILURE_CHECK(cond) EVUTIL_UNLIKELY(cond)
#endif
#ifndef _EVENT_HAVE_STRUCT_SOCKADDR_STORAGE
/* Replacement for sockaddr storage that we can use internally on platforms
* that lack it. It is not space-efficient, but neither is sockaddr_storage.
*/
struct sockaddr_storage {
union {
struct sockaddr ss_sa;
struct sockaddr_in ss_sin;
struct sockaddr_in6 ss_sin6;
char ss_padding[128];
} ss_union;
};
#define ss_family ss_union.ss_sa.sa_family
#endif
/* Internal addrinfo error code. This one is returned from only from
* evutil_getaddrinfo_common, when we are sure that we'll have to hit a DNS
* server. */
#define EVUTIL_EAI_NEED_RESOLVE -90002
struct evdns_base;
struct evdns_getaddrinfo_request;
typedef struct evdns_getaddrinfo_request* (*evdns_getaddrinfo_fn)(
struct evdns_base *base,
const char *nodename, const char *servname,
const struct evutil_addrinfo *hints_in,
void (*cb)(int, struct evutil_addrinfo *, void *), void *arg);
void evutil_set_evdns_getaddrinfo_fn(evdns_getaddrinfo_fn fn);
struct evutil_addrinfo *evutil_new_addrinfo(struct sockaddr *sa,
ev_socklen_t socklen, const struct evutil_addrinfo *hints);
struct evutil_addrinfo *evutil_addrinfo_append(struct evutil_addrinfo *first,
struct evutil_addrinfo *append);
void evutil_adjust_hints_for_addrconfig(struct evutil_addrinfo *hints);
int evutil_getaddrinfo_common(const char *nodename, const char *servname,
struct evutil_addrinfo *hints, struct evutil_addrinfo **res, int *portnum);
int evutil_getaddrinfo_async(struct evdns_base *dns_base,
const char *nodename, const char *servname,
const struct evutil_addrinfo *hints_in,
void (*cb)(int, struct evutil_addrinfo *, void *), void *arg);
/** Return true iff sa is a looback address. (That is, it is 127.0.0.1/8, or
* ::1). */
int evutil_sockaddr_is_loopback(const struct sockaddr *sa);
/**
Formats a sockaddr sa into a string buffer of size outlen stored in out.
Returns a pointer to out. Always writes something into out, so it's safe
to use the output of this function without checking it for NULL.
*/
const char *evutil_format_sockaddr_port(const struct sockaddr *sa, char *out, size_t outlen);
long evutil_tv_to_msec(const struct timeval *tv);
int evutil_hex_char_to_int(char c);
#ifdef WIN32
HANDLE evutil_load_windows_system_library(const TCHAR *library_name);
#endif
#ifndef EV_SIZE_FMT
#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__)
#define EV_U64_FMT "%I64u"
#define EV_I64_FMT "%I64d"
#define EV_I64_ARG(x) ((__int64)(x))
#define EV_U64_ARG(x) ((unsigned __int64)(x))
#else
#define EV_U64_FMT "%llu"
#define EV_I64_FMT "%lld"
#define EV_I64_ARG(x) ((long long)(x))
#define EV_U64_ARG(x) ((unsigned long long)(x))
#endif
#endif
#ifdef _WIN32
#define EV_SOCK_FMT EV_I64_FMT
#define EV_SOCK_ARG(x) EV_I64_ARG((x))
#else
#define EV_SOCK_FMT "%d"
#define EV_SOCK_ARG(x) (x)
#endif
#if defined(__STDC__) && defined(__STDC_VERSION__)
#if (__STDC_VERSION__ >= 199901L)
#define EV_SIZE_FMT "%zu"
#define EV_SSIZE_FMT "%zd"
#define EV_SIZE_ARG(x) (x)
#define EV_SSIZE_ARG(x) (x)
#endif
#endif
#ifndef EV_SIZE_FMT
#if (_EVENT_SIZEOF_SIZE_T <= _EVENT_SIZEOF_LONG)
#define EV_SIZE_FMT "%lu"
#define EV_SSIZE_FMT "%ld"
#define EV_SIZE_ARG(x) ((unsigned long)(x))
#define EV_SSIZE_ARG(x) ((long)(x))
#else
#define EV_SIZE_FMT EV_U64_FMT
#define EV_SSIZE_FMT EV_I64_FMT
#define EV_SIZE_ARG(x) EV_U64_ARG(x)
#define EV_SSIZE_ARG(x) EV_I64_ARG(x)
#endif
#endif
#ifdef __cplusplus
}
#endif
#endif
|
