libevent
util.h
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1 /*
2  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  * notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
11  * documentation and/or other materials provided with the distribution.
12  * 3. The name of the author may not be used to endorse or promote products
13  * derived from this software without specific prior written permission.
14  *
15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25  */
26 #ifndef EVENT2_UTIL_H_INCLUDED_
27 #define EVENT2_UTIL_H_INCLUDED_
28 
35 #include <event2/visibility.h>
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
41 #include <event2/event-config.h>
42 #ifdef EVENT__HAVE_SYS_TIME_H
43 #include <sys/time.h>
44 #endif
45 #ifdef EVENT__HAVE_STDINT_H
46 #include <stdint.h>
47 #elif defined(EVENT__HAVE_INTTYPES_H)
48 #include <inttypes.h>
49 #endif
50 #ifdef EVENT__HAVE_SYS_TYPES_H
51 #include <sys/types.h>
52 #endif
53 #ifdef EVENT__HAVE_STDDEF_H
54 #include <stddef.h>
55 #endif
56 #ifdef _MSC_VER
57 #include <BaseTsd.h>
58 #endif
59 #include <stdarg.h>
60 #ifdef EVENT__HAVE_NETDB_H
61 #include <netdb.h>
62 #endif
63 
64 #ifdef _WIN32
65 #include <winsock2.h>
66 #ifdef EVENT__HAVE_GETADDRINFO
67 /* for EAI_* definitions. */
68 #include <ws2tcpip.h>
69 #endif
70 #else
71 #ifdef EVENT__HAVE_ERRNO_H
72 #include <errno.h>
73 #endif
74 #include <sys/socket.h>
75 #endif
76 
77 #ifdef __OS2__
78 #include <libcx/net.h>
79 #endif
80 #include <time.h>
81 
82 /* Some openbsd autoconf versions get the name of this macro wrong. */
83 #if defined(EVENT__SIZEOF_VOID__) && !defined(EVENT__SIZEOF_VOID_P)
84 #define EVENT__SIZEOF_VOID_P EVENT__SIZEOF_VOID__
85 #endif
86 
116 #ifdef EVENT__HAVE_UINT64_T
117 #define ev_uint64_t uint64_t
118 #define ev_int64_t int64_t
119 #elif defined(_WIN32)
120 #define ev_uint64_t unsigned __int64
121 #define ev_int64_t signed __int64
122 #elif EVENT__SIZEOF_LONG_LONG == 8
123 #define ev_uint64_t unsigned long long
124 #define ev_int64_t long long
125 #elif EVENT__SIZEOF_LONG == 8
126 #define ev_uint64_t unsigned long
127 #define ev_int64_t long
128 #elif defined(EVENT_IN_DOXYGEN_)
129 #define ev_uint64_t ...
130 #define ev_int64_t ...
131 #else
132 #error "No way to define ev_uint64_t"
133 #endif
134 
135 #ifdef EVENT__HAVE_UINT32_T
136 #define ev_uint32_t uint32_t
137 #define ev_int32_t int32_t
138 #elif defined(_WIN32)
139 #define ev_uint32_t unsigned int
140 #define ev_int32_t signed int
141 #elif EVENT__SIZEOF_LONG == 4
142 #define ev_uint32_t unsigned long
143 #define ev_int32_t signed long
144 #elif EVENT__SIZEOF_INT == 4
145 #define ev_uint32_t unsigned int
146 #define ev_int32_t signed int
147 #elif defined(EVENT_IN_DOXYGEN_)
148 #define ev_uint32_t ...
149 #define ev_int32_t ...
150 #else
151 #error "No way to define ev_uint32_t"
152 #endif
153 
154 #ifdef EVENT__HAVE_UINT16_T
155 #define ev_uint16_t uint16_t
156 #define ev_int16_t int16_t
157 #elif defined(_WIN32)
158 #define ev_uint16_t unsigned short
159 #define ev_int16_t signed short
160 #elif EVENT__SIZEOF_INT == 2
161 #define ev_uint16_t unsigned int
162 #define ev_int16_t signed int
163 #elif EVENT__SIZEOF_SHORT == 2
164 #define ev_uint16_t unsigned short
165 #define ev_int16_t signed short
166 #elif defined(EVENT_IN_DOXYGEN_)
167 #define ev_uint16_t ...
168 #define ev_int16_t ...
169 #else
170 #error "No way to define ev_uint16_t"
171 #endif
172 
173 #ifdef EVENT__HAVE_UINT8_T
174 #define ev_uint8_t uint8_t
175 #define ev_int8_t int8_t
176 #elif defined(EVENT_IN_DOXYGEN_)
177 #define ev_uint8_t ...
178 #define ev_int8_t ...
179 #else
180 #define ev_uint8_t unsigned char
181 #define ev_int8_t signed char
182 #endif
183 
184 #ifdef EVENT__HAVE_UINTPTR_T
185 #define ev_uintptr_t uintptr_t
186 #define ev_intptr_t intptr_t
187 #elif EVENT__SIZEOF_VOID_P <= 4
188 #define ev_uintptr_t ev_uint32_t
189 #define ev_intptr_t ev_int32_t
190 #elif EVENT__SIZEOF_VOID_P <= 8
191 #define ev_uintptr_t ev_uint64_t
192 #define ev_intptr_t ev_int64_t
193 #elif defined(EVENT_IN_DOXYGEN_)
194 #define ev_uintptr_t ...
195 #define ev_intptr_t ...
196 #else
197 #error "No way to define ev_uintptr_t"
198 #endif
199 
200 #ifdef EVENT__ssize_t
201 #define ev_ssize_t EVENT__ssize_t
202 #else
203 #define ev_ssize_t ssize_t
204 #endif
205 
206 /* Note that we define ev_off_t based on the compile-time size of off_t that
207  * we used to build Libevent, and not based on the current size of off_t.
208  * (For example, we don't define ev_off_t to off_t.). We do this because
209  * some systems let you build your software with different off_t sizes
210  * at runtime, and so putting in any dependency on off_t would risk API
211  * mismatch.
212  */
213 #ifdef _WIN32
214 #define ev_off_t ev_int64_t
215 #elif EVENT__SIZEOF_OFF_T == 8
216 #define ev_off_t ev_int64_t
217 #elif EVENT__SIZEOF_OFF_T == 4
218 #define ev_off_t ev_int32_t
219 #elif defined(EVENT_IN_DOXYGEN_)
220 #define ev_off_t ...
221 #else
222 #define ev_off_t off_t
223 #endif
224 
226 /* Limits for integer types.
227 
228  We're making two assumptions here:
229  - The compiler does constant folding properly.
230  - The platform does signed arithmetic in two's complement.
231 */
232 
241 #ifndef EVENT__HAVE_STDINT_H
242 #define EV_UINT64_MAX ((((ev_uint64_t)0xffffffffUL) << 32) | 0xffffffffUL)
243 #define EV_INT64_MAX ((((ev_int64_t) 0x7fffffffL) << 32) | 0xffffffffL)
244 #define EV_INT64_MIN ((-EV_INT64_MAX) - 1)
245 #define EV_UINT32_MAX ((ev_uint32_t)0xffffffffUL)
246 #define EV_INT32_MAX ((ev_int32_t) 0x7fffffffL)
247 #define EV_INT32_MIN ((-EV_INT32_MAX) - 1)
248 #define EV_UINT16_MAX ((ev_uint16_t)0xffffUL)
249 #define EV_INT16_MAX ((ev_int16_t) 0x7fffL)
250 #define EV_INT16_MIN ((-EV_INT16_MAX) - 1)
251 #define EV_UINT8_MAX 255
252 #define EV_INT8_MAX 127
253 #define EV_INT8_MIN ((-EV_INT8_MAX) - 1)
254 #else
255 #define EV_UINT64_MAX UINT64_MAX
256 #define EV_INT64_MAX INT64_MAX
257 #define EV_INT64_MIN INT64_MIN
258 #define EV_UINT32_MAX UINT32_MAX
259 #define EV_INT32_MAX INT32_MAX
260 #define EV_INT32_MIN INT32_MIN
261 #define EV_UINT16_MAX UINT16_MAX
262 #define EV_INT16_MIN INT16_MIN
263 #define EV_INT16_MAX INT16_MAX
264 #define EV_UINT8_MAX UINT8_MAX
265 #define EV_INT8_MAX INT8_MAX
266 #define EV_INT8_MIN INT8_MIN
267 
268 #endif
269 
270 
276 #if EVENT__SIZEOF_SIZE_T == 8
277 #define EV_SIZE_MAX EV_UINT64_MAX
278 #define EV_SSIZE_MAX EV_INT64_MAX
279 #elif EVENT__SIZEOF_SIZE_T == 4
280 #define EV_SIZE_MAX EV_UINT32_MAX
281 #define EV_SSIZE_MAX EV_INT32_MAX
282 #elif defined(EVENT_IN_DOXYGEN_)
283 #define EV_SIZE_MAX ...
284 #define EV_SSIZE_MAX ...
285 #else
286 #error "No way to define SIZE_MAX"
287 #endif
288 
289 #define EV_SSIZE_MIN ((-EV_SSIZE_MAX) - 1)
290 
292 #ifdef _WIN32
293 #define ev_socklen_t int
294 #elif defined(EVENT__socklen_t)
295 #define ev_socklen_t EVENT__socklen_t
296 #else
297 #define ev_socklen_t socklen_t
298 #endif
299 
300 #ifdef EVENT__HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY
301 #if !defined(EVENT__HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY) \
302  && !defined(ss_family)
303 #define ss_family __ss_family
304 #endif
305 #endif
306 
310 #ifdef _WIN32
311 #define evutil_socket_t intptr_t
312 #else
313 #define evutil_socket_t int
314 #endif
315 
329 #ifdef EVENT_IN_DOXYGEN_
330 {/*Empty body so that doxygen will generate documentation here.*/}
331 #endif
332 ;
333 
334 #define EV_MONOT_PRECISE 1
335 #define EV_MONOT_FALLBACK 2
336 
343 EVENT2_EXPORT_SYMBOL int
344 evutil_date_rfc1123(char *date, const size_t datelen, const struct tm *tm);
345 
351 EVENT2_EXPORT_SYMBOL
353 
357 EVENT2_EXPORT_SYMBOL
359 
363 EVENT2_EXPORT_SYMBOL
365  int flags);
366 
377 EVENT2_EXPORT_SYMBOL
379  struct timeval *tp);
380 
392 EVENT2_EXPORT_SYMBOL
393 int evutil_socketpair(int d, int type, int protocol, evutil_socket_t sv[2]);
399 EVENT2_EXPORT_SYMBOL
401 
413 EVENT2_EXPORT_SYMBOL
415 
426 EVENT2_EXPORT_SYMBOL
428 
438 EVENT2_EXPORT_SYMBOL
440 
447 EVENT2_EXPORT_SYMBOL
449 
457 EVENT2_EXPORT_SYMBOL
459 #define EVUTIL_CLOSESOCKET(s) evutil_closesocket(s)
460 
472 EVENT2_EXPORT_SYMBOL
474 
475 #ifdef _WIN32
476 
477 #define EVUTIL_SOCKET_ERROR() WSAGetLastError()
478 
479 #define EVUTIL_SET_SOCKET_ERROR(errcode) \
480  do { WSASetLastError(errcode); } while (0)
481 
482 EVENT2_EXPORT_SYMBOL
485 EVENT2_EXPORT_SYMBOL
486 const char *evutil_socket_error_to_string(int errcode);
487 #define EVUTIL_INVALID_SOCKET INVALID_SOCKET
488 #elif defined(EVENT_IN_DOXYGEN_)
489 
504 #define EVUTIL_SOCKET_ERROR() ...
505 
506 #define EVUTIL_SET_SOCKET_ERROR(errcode) ...
507 
508 #define evutil_socket_geterror(sock) ...
509 
510 #define evutil_socket_error_to_string(errcode) ...
511 #define EVUTIL_INVALID_SOCKET -1
512 
513 #else
514 #define EVUTIL_SOCKET_ERROR() (errno)
515 #define EVUTIL_SET_SOCKET_ERROR(errcode) \
516  do { errno = (errcode); } while (0)
517 #define evutil_socket_geterror(sock) (errno)
518 #define evutil_socket_error_to_string(errcode) (strerror(errcode))
519 #define EVUTIL_INVALID_SOCKET -1
520 #endif
531 #ifdef EVENT__HAVE_TIMERADD
532 #define evutil_timeradd(tvp, uvp, vvp) timeradd((tvp), (uvp), (vvp))
533 #define evutil_timersub(tvp, uvp, vvp) timersub((tvp), (uvp), (vvp))
534 #else
535 #define evutil_timeradd(tvp, uvp, vvp) \
536  do { \
537  (vvp)->tv_sec = (tvp)->tv_sec + (uvp)->tv_sec; \
538  (vvp)->tv_usec = (tvp)->tv_usec + (uvp)->tv_usec; \
539  if ((vvp)->tv_usec >= 1000000) { \
540  (vvp)->tv_sec++; \
541  (vvp)->tv_usec -= 1000000; \
542  } \
543  } while (0)
544 #define evutil_timersub(tvp, uvp, vvp) \
545  do { \
546  (vvp)->tv_sec = (tvp)->tv_sec - (uvp)->tv_sec; \
547  (vvp)->tv_usec = (tvp)->tv_usec - (uvp)->tv_usec; \
548  if ((vvp)->tv_usec < 0) { \
549  (vvp)->tv_sec--; \
550  (vvp)->tv_usec += 1000000; \
551  } \
552  } while (0)
553 #endif /* !EVENT__HAVE_TIMERADD */
554 
555 #ifdef EVENT__HAVE_TIMERCLEAR
556 #define evutil_timerclear(tvp) timerclear(tvp)
557 #else
558 #define evutil_timerclear(tvp) (tvp)->tv_sec = (tvp)->tv_usec = 0
559 #endif
560 
564 #define evutil_timercmp(tvp, uvp, cmp) \
565  (((tvp)->tv_sec == (uvp)->tv_sec) ? \
566  ((tvp)->tv_usec cmp (uvp)->tv_usec) : \
567  ((tvp)->tv_sec cmp (uvp)->tv_sec))
568 
569 #ifdef EVENT__HAVE_TIMERISSET
570 #define evutil_timerisset(tvp) timerisset(tvp)
571 #else
572 #define evutil_timerisset(tvp) ((tvp)->tv_sec || (tvp)->tv_usec)
573 #endif
574 
576 #ifdef offsetof
577 #define evutil_offsetof(type, field) offsetof(type, field)
578 #else
579 #define evutil_offsetof(type, field) ((off_t)(&((type *)0)->field))
580 #endif
581 
582 /* big-int related functions */
584 EVENT2_EXPORT_SYMBOL
585 ev_int64_t evutil_strtoll(const char *s, char **endptr, int base);
586 
588 #ifdef EVENT__HAVE_GETTIMEOFDAY
589 #define evutil_gettimeofday(tv, tz) gettimeofday((tv), (tz))
590 #else
591 struct timezone;
592 EVENT2_EXPORT_SYMBOL
593 int evutil_gettimeofday(struct timeval *tv, struct timezone *tz);
594 #endif
595 
599 EVENT2_EXPORT_SYMBOL
600 int evutil_snprintf(char *buf, size_t buflen, const char *format, ...)
601 #ifdef __GNUC__
602  __attribute__((format(printf, 3, 4)))
603 #endif
604 ;
608 EVENT2_EXPORT_SYMBOL
609 int evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap)
610 #ifdef __GNUC__
611  __attribute__((format(printf, 3, 0)))
612 #endif
613 ;
614 
616 EVENT2_EXPORT_SYMBOL
617 const char *evutil_inet_ntop(int af, const void *src, char *dst, size_t len);
619 EVENT2_EXPORT_SYMBOL
620 int evutil_inet_pton(int af, const char *src, void *dst);
621 struct sockaddr;
622 
643 EVENT2_EXPORT_SYMBOL
644 int evutil_parse_sockaddr_port(const char *str, struct sockaddr *out, int *outlen);
645 
651 EVENT2_EXPORT_SYMBOL
652 int evutil_sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2,
653  int include_port);
654 
658 EVENT2_EXPORT_SYMBOL
659 int evutil_ascii_strcasecmp(const char *str1, const char *str2);
663 EVENT2_EXPORT_SYMBOL
664 int evutil_ascii_strncasecmp(const char *str1, const char *str2, size_t n);
665 
666 /* Here we define evutil_addrinfo to the native addrinfo type, or redefine it
667  * if this system has no getaddrinfo(). */
668 #ifdef EVENT__HAVE_STRUCT_ADDRINFO
669 #define evutil_addrinfo addrinfo
670 #else
671 
677  int ai_flags; /* AI_PASSIVE, AI_CANONNAME, AI_NUMERICHOST */
678  int ai_family; /* PF_xxx */
679  int ai_socktype; /* SOCK_xxx */
680  int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
681  size_t ai_addrlen; /* length of ai_addr */
682  char *ai_canonname; /* canonical name for nodename */
683  struct sockaddr *ai_addr; /* binary address */
684  struct evutil_addrinfo *ai_next; /* next structure in linked list */
685 };
686 #endif
687 
694 #if defined(EAI_ADDRFAMILY) && defined(EVENT__HAVE_GETADDRINFO)
695 #define EVUTIL_EAI_ADDRFAMILY EAI_ADDRFAMILY
696 #else
697 #define EVUTIL_EAI_ADDRFAMILY -901
698 #endif
699 #if defined(EAI_AGAIN) && defined(EVENT__HAVE_GETADDRINFO)
700 #define EVUTIL_EAI_AGAIN EAI_AGAIN
701 #else
702 #define EVUTIL_EAI_AGAIN -902
703 #endif
704 #if defined(EAI_BADFLAGS) && defined(EVENT__HAVE_GETADDRINFO)
705 #define EVUTIL_EAI_BADFLAGS EAI_BADFLAGS
706 #else
707 #define EVUTIL_EAI_BADFLAGS -903
708 #endif
709 #if defined(EAI_FAIL) && defined(EVENT__HAVE_GETADDRINFO)
710 #define EVUTIL_EAI_FAIL EAI_FAIL
711 #else
712 #define EVUTIL_EAI_FAIL -904
713 #endif
714 #if defined(EAI_FAMILY) && defined(EVENT__HAVE_GETADDRINFO)
715 #define EVUTIL_EAI_FAMILY EAI_FAMILY
716 #else
717 #define EVUTIL_EAI_FAMILY -905
718 #endif
719 #if defined(EAI_MEMORY) && defined(EVENT__HAVE_GETADDRINFO)
720 #define EVUTIL_EAI_MEMORY EAI_MEMORY
721 #else
722 #define EVUTIL_EAI_MEMORY -906
723 #endif
724 /* This test is a bit complicated, since some MS SDKs decide to
725  * remove NODATA or redefine it to be the same as NONAME, in a
726  * fun interpretation of RFC 2553 and RFC 3493. */
727 #if defined(EAI_NODATA) && defined(EVENT__HAVE_GETADDRINFO) && (!defined(EAI_NONAME) || EAI_NODATA != EAI_NONAME)
728 #define EVUTIL_EAI_NODATA EAI_NODATA
729 #else
730 #define EVUTIL_EAI_NODATA -907
731 #endif
732 #if defined(EAI_NONAME) && defined(EVENT__HAVE_GETADDRINFO)
733 #define EVUTIL_EAI_NONAME EAI_NONAME
734 #else
735 #define EVUTIL_EAI_NONAME -908
736 #endif
737 #if defined(EAI_SERVICE) && defined(EVENT__HAVE_GETADDRINFO)
738 #define EVUTIL_EAI_SERVICE EAI_SERVICE
739 #else
740 #define EVUTIL_EAI_SERVICE -909
741 #endif
742 #if defined(EAI_SOCKTYPE) && defined(EVENT__HAVE_GETADDRINFO)
743 #define EVUTIL_EAI_SOCKTYPE EAI_SOCKTYPE
744 #else
745 #define EVUTIL_EAI_SOCKTYPE -910
746 #endif
747 #if defined(EAI_SYSTEM) && defined(EVENT__HAVE_GETADDRINFO)
748 #define EVUTIL_EAI_SYSTEM EAI_SYSTEM
749 #else
750 #define EVUTIL_EAI_SYSTEM -911
751 #endif
752 
753 #define EVUTIL_EAI_CANCEL -90001
754 
755 #if defined(AI_PASSIVE) && defined(EVENT__HAVE_GETADDRINFO)
756 #define EVUTIL_AI_PASSIVE AI_PASSIVE
757 #else
758 #define EVUTIL_AI_PASSIVE 0x1000
759 #endif
760 #if defined(AI_CANONNAME) && defined(EVENT__HAVE_GETADDRINFO)
761 #define EVUTIL_AI_CANONNAME AI_CANONNAME
762 #else
763 #define EVUTIL_AI_CANONNAME 0x2000
764 #endif
765 #if defined(AI_NUMERICHOST) && defined(EVENT__HAVE_GETADDRINFO)
766 #define EVUTIL_AI_NUMERICHOST AI_NUMERICHOST
767 #else
768 #define EVUTIL_AI_NUMERICHOST 0x4000
769 #endif
770 #if defined(AI_NUMERICSERV) && defined(EVENT__HAVE_GETADDRINFO)
771 #define EVUTIL_AI_NUMERICSERV AI_NUMERICSERV
772 #else
773 #define EVUTIL_AI_NUMERICSERV 0x8000
774 #endif
775 #if defined(AI_V4MAPPED) && defined(EVENT__HAVE_GETADDRINFO)
776 #define EVUTIL_AI_V4MAPPED AI_V4MAPPED
777 #else
778 #define EVUTIL_AI_V4MAPPED 0x10000
779 #endif
780 #if defined(AI_ALL) && defined(EVENT__HAVE_GETADDRINFO)
781 #define EVUTIL_AI_ALL AI_ALL
782 #else
783 #define EVUTIL_AI_ALL 0x20000
784 #endif
785 #if defined(AI_ADDRCONFIG) && defined(EVENT__HAVE_GETADDRINFO)
786 #define EVUTIL_AI_ADDRCONFIG AI_ADDRCONFIG
787 #else
788 #define EVUTIL_AI_ADDRCONFIG 0x40000
789 #endif
790 
792 struct evutil_addrinfo;
804 EVENT2_EXPORT_SYMBOL
805 int evutil_getaddrinfo(const char *nodename, const char *servname,
806  const struct evutil_addrinfo *hints_in, struct evutil_addrinfo **res);
807 
809 EVENT2_EXPORT_SYMBOL
810 void evutil_freeaddrinfo(struct evutil_addrinfo *ai);
811 
812 EVENT2_EXPORT_SYMBOL
813 const char *evutil_gai_strerror(int err);
814 
824 EVENT2_EXPORT_SYMBOL
825 void evutil_secure_rng_get_bytes(void *buf, size_t n);
826 
843 EVENT2_EXPORT_SYMBOL
844 int evutil_secure_rng_init(void);
845 
859 EVENT2_EXPORT_SYMBOL
861 
862 #if !defined(EVENT__HAVE_ARC4RANDOM) || defined(EVENT__HAVE_ARC4RANDOM_ADDRANDOM)
863 
877 EVENT2_EXPORT_SYMBOL
878 void evutil_secure_rng_add_bytes(const char *dat, size_t datlen);
879 #endif
880 
881 #ifdef __cplusplus
882 }
883 #endif
884 
885 #endif /* EVENT1_EVUTIL_H_INCLUDED_ */
evutil_monotonic_timer
Structure to hold information about a monotonic timer.
Definition: util.h:328
evutil_inet_pton
EVENT2_EXPORT_SYMBOL int evutil_inet_pton(int af, const char *src, void *dst)
Replacement for inet_pton for platforms which lack it.
evutil_date_rfc1123
EVENT2_EXPORT_SYMBOL int evutil_date_rfc1123(char *date, const size_t datelen, const struct tm *tm)
Format a date string using RFC 1123 format (used in HTTP).
evutil_gettime_monotonic
EVENT2_EXPORT_SYMBOL int evutil_gettime_monotonic(struct evutil_monotonic_timer *timer, struct timeval *tp)
Query the current monotonic time from a struct evutil_monotonic_timer previously configured with evut...
evutil_ascii_strcasecmp
EVENT2_EXPORT_SYMBOL int evutil_ascii_strcasecmp(const char *str1, const char *str2)
As strcasecmp, but always compares the characters in locale-independent ASCII.
evutil_make_listen_socket_ipv6only
EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_ipv6only(evutil_socket_t sock)
Set ipv6 only bind socket option to make listener work only in ipv6 sockets.
evutil_getaddrinfo
EVENT2_EXPORT_SYMBOL int evutil_getaddrinfo(const char *nodename, const char *servname, const struct evutil_addrinfo *hints_in, struct evutil_addrinfo **res)
This function clones getaddrinfo for systems that don't have it.
evutil_ascii_strncasecmp
EVENT2_EXPORT_SYMBOL int evutil_ascii_strncasecmp(const char *str1, const char *str2, size_t n)
As strncasecmp, but always compares the characters in locale-independent ASCII.
evutil_make_socket_nonblocking
EVENT2_EXPORT_SYMBOL int evutil_make_socket_nonblocking(evutil_socket_t sock)
Do platform-specific operations as needed to make a socket nonblocking.
evutil_secure_rng_init
EVENT2_EXPORT_SYMBOL int evutil_secure_rng_init(void)
Seed the secure random number generator if needed, and return 0 on success or -1 on failure.
evutil_parse_sockaddr_port
EVENT2_EXPORT_SYMBOL int evutil_parse_sockaddr_port(const char *str, struct sockaddr *out, int *outlen)
Parse an IPv4 or IPv6 address, with optional port, from a string.
evutil_secure_rng_set_urandom_device_file
EVENT2_EXPORT_SYMBOL int evutil_secure_rng_set_urandom_device_file(char *fname)
Set a filename to use in place of /dev/urandom for seeding the secure PRNG.
evutil_socket_error_to_string
#define evutil_socket_error_to_string(errcode)
Convert a socket error to a string.
Definition: util.h:510
evutil_inet_ntop
const EVENT2_EXPORT_SYMBOL char * evutil_inet_ntop(int af, const void *src, char *dst, size_t len)
Replacement for inet_ntop for platforms which lack it.
evutil_socket_geterror
#define evutil_socket_geterror(sock)
Return the most recent socket error to occur on sock.
Definition: util.h:508
evutil_snprintf
EVENT2_EXPORT_SYMBOL int evutil_snprintf(char *buf, size_t buflen, const char *format,...)
Replacement for snprintf to get consistent behavior on platforms for which the return value of snprin...
evutil_make_socket_closeonexec
EVENT2_EXPORT_SYMBOL int evutil_make_socket_closeonexec(evutil_socket_t sock)
Do platform-specific operations as needed to close a socket upon a successful execution of one of the...
evutil_configure_monotonic_time
EVENT2_EXPORT_SYMBOL int evutil_configure_monotonic_time(struct evutil_monotonic_timer *timer, int flags)
Set up a struct evutil_monotonic_timer; flags can include EV_MONOT_PRECISE and EV_MONOT_FALLBACK.
evutil_socketpair
EVENT2_EXPORT_SYMBOL int evutil_socketpair(int d, int type, int protocol, evutil_socket_t sv[2])
Create two new sockets that are connected to each other.
evutil_freeaddrinfo
EVENT2_EXPORT_SYMBOL void evutil_freeaddrinfo(struct evutil_addrinfo *ai)
Release storage allocated by evutil_getaddrinfo or evdns_getaddrinfo.
evutil_monotonic_timer_new
EVENT2_EXPORT_SYMBOL struct evutil_monotonic_timer * evutil_monotonic_timer_new(void)
Allocate a new struct evutil_monotonic_timer for use with the evutil_configure_monotonic_time() and e...
evutil_strtoll
EVENT2_EXPORT_SYMBOL ev_int64_t evutil_strtoll(const char *s, char **endptr, int base)
Parse a 64-bit value from a string.
evutil_make_tcp_listen_socket_deferred
EVENT2_EXPORT_SYMBOL int evutil_make_tcp_listen_socket_deferred(evutil_socket_t sock)
Do platform-specific operations, if possible, to make a tcp listener socket defer accept()s until the...
evutil_secure_rng_add_bytes
EVENT2_EXPORT_SYMBOL void evutil_secure_rng_add_bytes(const char *dat, size_t datlen)
Seed the random number generator with extra random bytes.
evutil_sockaddr_cmp
EVENT2_EXPORT_SYMBOL int evutil_sockaddr_cmp(const struct sockaddr *sa1, const struct sockaddr *sa2, int include_port)
Compare two sockaddrs; return 0 if they are equal, or less than 0 if sa1 preceeds sa2,...
evutil_closesocket
EVENT2_EXPORT_SYMBOL int evutil_closesocket(evutil_socket_t sock)
Do the platform-specific call needed to close a socket returned from socket() or accept().
evutil_monotonic_timer_free
EVENT2_EXPORT_SYMBOL void evutil_monotonic_timer_free(struct evutil_monotonic_timer *timer)
Free a struct evutil_monotonic_timer that was allocated using evutil_monotonic_timer_new().
evutil_addrinfo
A definition of struct addrinfo for systems that lack it.
Definition: util.h:676
evutil_make_listen_socket_reuseable_port
EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_reuseable_port(evutil_socket_t sock)
Do platform-specific operations to make a listener port reusable.
evutil_make_listen_socket_reuseable
EVENT2_EXPORT_SYMBOL int evutil_make_listen_socket_reuseable(evutil_socket_t sock)
Do platform-specific operations to make a listener socket reusable.
evutil_vsnprintf
EVENT2_EXPORT_SYMBOL int evutil_vsnprintf(char *buf, size_t buflen, const char *format, va_list ap)
Replacement for vsnprintf to get consistent behavior on platforms for which the return value of snpri...
evutil_secure_rng_get_bytes
EVENT2_EXPORT_SYMBOL void evutil_secure_rng_get_bytes(void *buf, size_t n)
Generate n bytes of secure pseudorandom data, and store them in buf.
evutil_socket_t
#define evutil_socket_t
A type wide enough to hold the output of "socket()" or "accept()".
Definition: util.h:313