Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 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 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 26 | #ifndef UTIL_INTERNAL_H_INCLUDED_ |
| 27 | #define UTIL_INTERNAL_H_INCLUDED_ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 28 | |
| 29 | #include "event2/event-config.h" |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 30 | #include "evconfig-private.h" |
| 31 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 32 | #include <errno.h> |
| 33 | |
| 34 | /* For EVUTIL_ASSERT */ |
| 35 | #include "log-internal.h" |
| 36 | #include <stdio.h> |
| 37 | #include <stdlib.h> |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 38 | #ifdef EVENT__HAVE_SYS_SOCKET_H |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 39 | #include <sys/socket.h> |
| 40 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 41 | #ifdef EVENT__HAVE_SYS_EVENTFD_H |
| 42 | #include <sys/eventfd.h> |
| 43 | #endif |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 44 | #include "event2/util.h" |
| 45 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 46 | #include "time-internal.h" |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 47 | #include "ipv6-internal.h" |
| 48 | |
| 49 | #ifdef __cplusplus |
| 50 | extern "C" { |
| 51 | #endif |
| 52 | |
| 53 | /* If we need magic to say "inline", get it for free internally. */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 54 | #ifdef EVENT__inline |
| 55 | #define inline EVENT__inline |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 56 | #endif |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 57 | #if defined(EVENT____func__) && !defined(__func__) |
| 58 | #define __func__ EVENT____func__ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 59 | #endif |
| 60 | |
| 61 | /* A good no-op to use in macro definitions. */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 62 | #define EVUTIL_NIL_STMT_ ((void)0) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 63 | /* A no-op that tricks the compiler into thinking a condition is used while |
| 64 | * definitely not making any code for it. Used to compile out asserts while |
| 65 | * avoiding "unused variable" warnings. The "!" forces the compiler to |
| 66 | * do the sizeof() on an int, in case "condition" is a bitfield value. |
| 67 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 68 | #define EVUTIL_NIL_CONDITION_(condition) do { \ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 69 | (void)sizeof(!(condition)); \ |
| 70 | } while(0) |
| 71 | |
| 72 | /* Internal use only: macros to match patterns of error codes in a |
| 73 | cross-platform way. We need these macros because of two historical |
| 74 | reasons: first, nonblocking IO functions are generally written to give an |
| 75 | error on the "blocked now, try later" case, so sometimes an error from a |
| 76 | read, write, connect, or accept means "no error; just wait for more |
| 77 | data," and we need to look at the error code. Second, Windows defines |
| 78 | a different set of error codes for sockets. */ |
| 79 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 80 | #ifndef _WIN32 |
| 81 | |
| 82 | #if EAGAIN == EWOULDBLOCK |
| 83 | #define EVUTIL_ERR_IS_EAGAIN(e) \ |
| 84 | ((e) == EAGAIN) |
| 85 | #else |
| 86 | #define EVUTIL_ERR_IS_EAGAIN(e) \ |
| 87 | ((e) == EAGAIN || (e) == EWOULDBLOCK) |
| 88 | #endif |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 89 | |
| 90 | /* True iff e is an error that means a read/write operation can be retried. */ |
| 91 | #define EVUTIL_ERR_RW_RETRIABLE(e) \ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 92 | ((e) == EINTR || EVUTIL_ERR_IS_EAGAIN(e)) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 93 | /* True iff e is an error that means an connect can be retried. */ |
| 94 | #define EVUTIL_ERR_CONNECT_RETRIABLE(e) \ |
| 95 | ((e) == EINTR || (e) == EINPROGRESS) |
| 96 | /* True iff e is an error that means a accept can be retried. */ |
| 97 | #define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 98 | ((e) == EINTR || EVUTIL_ERR_IS_EAGAIN(e) || (e) == ECONNABORTED) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 99 | |
| 100 | /* True iff e is an error that means the connection was refused */ |
| 101 | #define EVUTIL_ERR_CONNECT_REFUSED(e) \ |
| 102 | ((e) == ECONNREFUSED) |
| 103 | |
| 104 | #else |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 105 | /* Win32 */ |
| 106 | |
| 107 | #define EVUTIL_ERR_IS_EAGAIN(e) \ |
| 108 | ((e) == WSAEWOULDBLOCK || (e) == EAGAIN) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 109 | |
| 110 | #define EVUTIL_ERR_RW_RETRIABLE(e) \ |
| 111 | ((e) == WSAEWOULDBLOCK || \ |
| 112 | (e) == WSAEINTR) |
| 113 | |
| 114 | #define EVUTIL_ERR_CONNECT_RETRIABLE(e) \ |
| 115 | ((e) == WSAEWOULDBLOCK || \ |
| 116 | (e) == WSAEINTR || \ |
| 117 | (e) == WSAEINPROGRESS || \ |
| 118 | (e) == WSAEINVAL) |
| 119 | |
| 120 | #define EVUTIL_ERR_ACCEPT_RETRIABLE(e) \ |
| 121 | EVUTIL_ERR_RW_RETRIABLE(e) |
| 122 | |
| 123 | #define EVUTIL_ERR_CONNECT_REFUSED(e) \ |
| 124 | ((e) == WSAECONNREFUSED) |
| 125 | |
| 126 | #endif |
| 127 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 128 | /* Arguments for shutdown() */ |
| 129 | #ifdef SHUT_RD |
| 130 | #define EVUTIL_SHUT_RD SHUT_RD |
| 131 | #else |
| 132 | #define EVUTIL_SHUT_RD 0 |
| 133 | #endif |
| 134 | #ifdef SHUT_WR |
| 135 | #define EVUTIL_SHUT_WR SHUT_WR |
| 136 | #else |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 137 | #define EVUTIL_SHUT_WR 1 /* SD_SEND */ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 138 | #endif |
| 139 | #ifdef SHUT_BOTH |
| 140 | #define EVUTIL_SHUT_BOTH SHUT_BOTH |
| 141 | #else |
| 142 | #define EVUTIL_SHUT_BOTH 2 |
| 143 | #endif |
| 144 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 145 | /* Helper: Verify that all the elements in 'dlist' are internally consistent. |
| 146 | * Checks for circular lists and bad prev/next pointers. |
| 147 | * |
| 148 | * Example usage: |
| 149 | * EVUTIL_ASSERT_LIST_OK(eventlist, event, ev_next); |
| 150 | */ |
| 151 | #define EVUTIL_ASSERT_LIST_OK(dlist, type, field) do { \ |
| 152 | struct type *elm1, *elm2, **nextp; \ |
| 153 | if (LIST_EMPTY((dlist))) \ |
| 154 | break; \ |
| 155 | \ |
| 156 | /* Check list for circularity using Floyd's */ \ |
| 157 | /* 'Tortoise and Hare' algorithm */ \ |
| 158 | elm1 = LIST_FIRST((dlist)); \ |
| 159 | elm2 = LIST_NEXT(elm1, field); \ |
| 160 | while (elm1 && elm2) { \ |
| 161 | EVUTIL_ASSERT(elm1 != elm2); \ |
| 162 | elm1 = LIST_NEXT(elm1, field); \ |
| 163 | elm2 = LIST_NEXT(elm2, field); \ |
| 164 | if (!elm2) \ |
| 165 | break; \ |
| 166 | EVUTIL_ASSERT(elm1 != elm2); \ |
| 167 | elm2 = LIST_NEXT(elm2, field); \ |
| 168 | } \ |
| 169 | \ |
| 170 | /* Now check next and prev pointers for consistency. */ \ |
| 171 | nextp = &LIST_FIRST((dlist)); \ |
| 172 | elm1 = LIST_FIRST((dlist)); \ |
| 173 | while (elm1) { \ |
| 174 | EVUTIL_ASSERT(*nextp == elm1); \ |
| 175 | EVUTIL_ASSERT(nextp == elm1->field.le_prev); \ |
| 176 | nextp = &LIST_NEXT(elm1, field); \ |
| 177 | elm1 = *nextp; \ |
| 178 | } \ |
| 179 | } while (0) |
| 180 | |
| 181 | /* Helper: Verify that all the elements in a TAILQ are internally consistent. |
| 182 | * Checks for circular lists and bad prev/next pointers. |
| 183 | * |
| 184 | * Example usage: |
| 185 | * EVUTIL_ASSERT_TAILQ_OK(activelist, event, ev_active_next); |
| 186 | */ |
| 187 | #define EVUTIL_ASSERT_TAILQ_OK(tailq, type, field) do { \ |
| 188 | struct type *elm1, *elm2, **nextp; \ |
| 189 | if (TAILQ_EMPTY((tailq))) \ |
| 190 | break; \ |
| 191 | \ |
| 192 | /* Check list for circularity using Floyd's */ \ |
| 193 | /* 'Tortoise and Hare' algorithm */ \ |
| 194 | elm1 = TAILQ_FIRST((tailq)); \ |
| 195 | elm2 = TAILQ_NEXT(elm1, field); \ |
| 196 | while (elm1 && elm2) { \ |
| 197 | EVUTIL_ASSERT(elm1 != elm2); \ |
| 198 | elm1 = TAILQ_NEXT(elm1, field); \ |
| 199 | elm2 = TAILQ_NEXT(elm2, field); \ |
| 200 | if (!elm2) \ |
| 201 | break; \ |
| 202 | EVUTIL_ASSERT(elm1 != elm2); \ |
| 203 | elm2 = TAILQ_NEXT(elm2, field); \ |
| 204 | } \ |
| 205 | \ |
| 206 | /* Now check next and prev pointers for consistency. */ \ |
| 207 | nextp = &TAILQ_FIRST((tailq)); \ |
| 208 | elm1 = TAILQ_FIRST((tailq)); \ |
| 209 | while (elm1) { \ |
| 210 | EVUTIL_ASSERT(*nextp == elm1); \ |
| 211 | EVUTIL_ASSERT(nextp == elm1->field.tqe_prev); \ |
| 212 | nextp = &TAILQ_NEXT(elm1, field); \ |
| 213 | elm1 = *nextp; \ |
| 214 | } \ |
| 215 | EVUTIL_ASSERT(nextp == (tailq)->tqh_last); \ |
| 216 | } while (0) |
| 217 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 218 | /* Locale-independent replacements for some ctypes functions. Use these |
| 219 | * when you care about ASCII's notion of character types, because you are about |
| 220 | * to send those types onto the wire. |
| 221 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 222 | int EVUTIL_ISALPHA_(char c); |
| 223 | int EVUTIL_ISALNUM_(char c); |
| 224 | int EVUTIL_ISSPACE_(char c); |
| 225 | int EVUTIL_ISDIGIT_(char c); |
| 226 | int EVUTIL_ISXDIGIT_(char c); |
| 227 | int EVUTIL_ISPRINT_(char c); |
| 228 | int EVUTIL_ISLOWER_(char c); |
| 229 | int EVUTIL_ISUPPER_(char c); |
| 230 | char EVUTIL_TOUPPER_(char c); |
| 231 | char EVUTIL_TOLOWER_(char c); |
| 232 | |
| 233 | /** Remove all trailing horizontal whitespace (space or tab) from the end of a |
| 234 | * string */ |
| 235 | void evutil_rtrim_lws_(char *); |
| 236 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 237 | |
| 238 | /** Helper macro. If we know that a given pointer points to a field in a |
| 239 | structure, return a pointer to the structure itself. Used to implement |
| 240 | our half-baked C OO. Example: |
| 241 | |
| 242 | struct subtype { |
| 243 | int x; |
| 244 | struct supertype common; |
| 245 | int y; |
| 246 | }; |
| 247 | ... |
| 248 | void fn(struct supertype *super) { |
| 249 | struct subtype *sub = EVUTIL_UPCAST(super, struct subtype, common); |
| 250 | ... |
| 251 | } |
| 252 | */ |
| 253 | #define EVUTIL_UPCAST(ptr, type, field) \ |
| 254 | ((type *)(((char*)(ptr)) - evutil_offsetof(type, field))) |
| 255 | |
| 256 | /* As open(pathname, flags, mode), except that the file is always opened with |
| 257 | * the close-on-exec flag set. (And the mode argument is mandatory.) |
| 258 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 259 | int evutil_open_closeonexec_(const char *pathname, int flags, unsigned mode); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 260 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 261 | int evutil_read_file_(const char *filename, char **content_out, size_t *len_out, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 262 | int is_binary); |
| 263 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 264 | int evutil_socket_connect_(evutil_socket_t *fd_ptr, const struct sockaddr *sa, int socklen); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 265 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 266 | int evutil_socket_finished_connecting_(evutil_socket_t fd); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 267 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 268 | int evutil_ersatz_socketpair_(int, int , int, evutil_socket_t[]); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 269 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 270 | int evutil_resolve_(int family, const char *hostname, struct sockaddr *sa, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 271 | ev_socklen_t *socklen, int port); |
| 272 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 273 | const char *evutil_getenv_(const char *name); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 274 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 275 | /* Structure to hold the state of our weak random number generator. |
| 276 | */ |
| 277 | struct evutil_weakrand_state { |
| 278 | ev_uint32_t seed; |
| 279 | }; |
| 280 | |
| 281 | #define EVUTIL_WEAKRAND_MAX EV_INT32_MAX |
| 282 | |
| 283 | /* Initialize the state of a week random number generator based on 'seed'. If |
| 284 | * the seed is 0, construct a new seed based on not-very-strong platform |
| 285 | * entropy, like the PID and the time of day. |
| 286 | * |
| 287 | * This function, and the other evutil_weakrand* functions, are meant for |
| 288 | * speed, not security or statistical strength. If you need a RNG which an |
| 289 | * attacker can't predict, or which passes strong statistical tests, use the |
| 290 | * evutil_secure_rng* functions instead. |
| 291 | */ |
| 292 | ev_uint32_t evutil_weakrand_seed_(struct evutil_weakrand_state *state, ev_uint32_t seed); |
| 293 | /* Return a pseudorandom value between 0 and EVUTIL_WEAKRAND_MAX inclusive. |
| 294 | * Updates the state in 'seed' as needed -- this value must be protected by a |
| 295 | * lock. |
| 296 | */ |
| 297 | ev_int32_t evutil_weakrand_(struct evutil_weakrand_state *seed); |
| 298 | /* Return a pseudorandom value x such that 0 <= x < top. top must be no more |
| 299 | * than EVUTIL_WEAKRAND_MAX. Updates the state in 'seed' as needed -- this |
| 300 | * value must be proteced by a lock */ |
| 301 | ev_int32_t evutil_weakrand_range_(struct evutil_weakrand_state *seed, ev_int32_t top); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 302 | |
| 303 | /* Evaluates to the same boolean value as 'p', and hints to the compiler that |
| 304 | * we expect this value to be false. */ |
| 305 | #if defined(__GNUC__) && __GNUC__ >= 3 /* gcc 3.0 or later */ |
| 306 | #define EVUTIL_UNLIKELY(p) __builtin_expect(!!(p),0) |
| 307 | #else |
| 308 | #define EVUTIL_UNLIKELY(p) (p) |
| 309 | #endif |
| 310 | |
| 311 | /* Replacement for assert() that calls event_errx on failure. */ |
| 312 | #ifdef NDEBUG |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 313 | #define EVUTIL_ASSERT(cond) EVUTIL_NIL_CONDITION_(cond) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 314 | #define EVUTIL_FAILURE_CHECK(cond) 0 |
| 315 | #else |
| 316 | #define EVUTIL_ASSERT(cond) \ |
| 317 | do { \ |
| 318 | if (EVUTIL_UNLIKELY(!(cond))) { \ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 319 | event_errx(EVENT_ERR_ABORT_, \ |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 320 | "%s:%d: Assertion %s failed in %s", \ |
| 321 | __FILE__,__LINE__,#cond,__func__); \ |
| 322 | /* In case a user-supplied handler tries to */ \ |
| 323 | /* return control to us, log and abort here. */ \ |
| 324 | (void)fprintf(stderr, \ |
| 325 | "%s:%d: Assertion %s failed in %s", \ |
| 326 | __FILE__,__LINE__,#cond,__func__); \ |
| 327 | abort(); \ |
| 328 | } \ |
| 329 | } while (0) |
| 330 | #define EVUTIL_FAILURE_CHECK(cond) EVUTIL_UNLIKELY(cond) |
| 331 | #endif |
| 332 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 333 | #ifndef EVENT__HAVE_STRUCT_SOCKADDR_STORAGE |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 334 | /* Replacement for sockaddr storage that we can use internally on platforms |
| 335 | * that lack it. It is not space-efficient, but neither is sockaddr_storage. |
| 336 | */ |
| 337 | struct sockaddr_storage { |
| 338 | union { |
| 339 | struct sockaddr ss_sa; |
| 340 | struct sockaddr_in ss_sin; |
| 341 | struct sockaddr_in6 ss_sin6; |
| 342 | char ss_padding[128]; |
| 343 | } ss_union; |
| 344 | }; |
| 345 | #define ss_family ss_union.ss_sa.sa_family |
| 346 | #endif |
| 347 | |
| 348 | /* Internal addrinfo error code. This one is returned from only from |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 349 | * evutil_getaddrinfo_common_, when we are sure that we'll have to hit a DNS |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 350 | * server. */ |
| 351 | #define EVUTIL_EAI_NEED_RESOLVE -90002 |
| 352 | |
| 353 | struct evdns_base; |
| 354 | struct evdns_getaddrinfo_request; |
| 355 | typedef struct evdns_getaddrinfo_request* (*evdns_getaddrinfo_fn)( |
| 356 | struct evdns_base *base, |
| 357 | const char *nodename, const char *servname, |
| 358 | const struct evutil_addrinfo *hints_in, |
| 359 | void (*cb)(int, struct evutil_addrinfo *, void *), void *arg); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 360 | void evutil_set_evdns_getaddrinfo_fn_(evdns_getaddrinfo_fn fn); |
| 361 | typedef void (*evdns_getaddrinfo_cancel_fn)( |
| 362 | struct evdns_getaddrinfo_request *req); |
| 363 | void evutil_set_evdns_getaddrinfo_cancel_fn_(evdns_getaddrinfo_cancel_fn fn); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 364 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 365 | struct evutil_addrinfo *evutil_new_addrinfo_(struct sockaddr *sa, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 366 | ev_socklen_t socklen, const struct evutil_addrinfo *hints); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 367 | struct evutil_addrinfo *evutil_addrinfo_append_(struct evutil_addrinfo *first, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 368 | struct evutil_addrinfo *append); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 369 | void evutil_adjust_hints_for_addrconfig_(struct evutil_addrinfo *hints); |
| 370 | int evutil_getaddrinfo_common_(const char *nodename, const char *servname, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 371 | struct evutil_addrinfo *hints, struct evutil_addrinfo **res, int *portnum); |
| 372 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 373 | struct evdns_getaddrinfo_request *evutil_getaddrinfo_async_( |
| 374 | struct evdns_base *dns_base, |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 375 | const char *nodename, const char *servname, |
| 376 | const struct evutil_addrinfo *hints_in, |
| 377 | void (*cb)(int, struct evutil_addrinfo *, void *), void *arg); |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 378 | void evutil_getaddrinfo_cancel_async_(struct evdns_getaddrinfo_request *data); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 379 | |
| 380 | /** Return true iff sa is a looback address. (That is, it is 127.0.0.1/8, or |
| 381 | * ::1). */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 382 | int evutil_sockaddr_is_loopback_(const struct sockaddr *sa); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 383 | |
| 384 | |
| 385 | /** |
| 386 | Formats a sockaddr sa into a string buffer of size outlen stored in out. |
| 387 | Returns a pointer to out. Always writes something into out, so it's safe |
| 388 | to use the output of this function without checking it for NULL. |
| 389 | */ |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 390 | const char *evutil_format_sockaddr_port_(const struct sockaddr *sa, char *out, size_t outlen); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 391 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 392 | int evutil_hex_char_to_int_(char c); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 393 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 394 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 395 | void evutil_free_secure_rng_globals_(void); |
| 396 | void evutil_free_globals_(void); |
| 397 | |
| 398 | #ifdef _WIN32 |
| 399 | HMODULE evutil_load_windows_system_library_(const TCHAR *library_name); |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 400 | #endif |
| 401 | |
| 402 | #ifndef EV_SIZE_FMT |
| 403 | #if defined(_MSC_VER) || defined(__MINGW32__) || defined(__MINGW64__) |
| 404 | #define EV_U64_FMT "%I64u" |
| 405 | #define EV_I64_FMT "%I64d" |
| 406 | #define EV_I64_ARG(x) ((__int64)(x)) |
| 407 | #define EV_U64_ARG(x) ((unsigned __int64)(x)) |
| 408 | #else |
| 409 | #define EV_U64_FMT "%llu" |
| 410 | #define EV_I64_FMT "%lld" |
| 411 | #define EV_I64_ARG(x) ((long long)(x)) |
| 412 | #define EV_U64_ARG(x) ((unsigned long long)(x)) |
| 413 | #endif |
| 414 | #endif |
| 415 | |
| 416 | #ifdef _WIN32 |
| 417 | #define EV_SOCK_FMT EV_I64_FMT |
| 418 | #define EV_SOCK_ARG(x) EV_I64_ARG((x)) |
| 419 | #else |
| 420 | #define EV_SOCK_FMT "%d" |
| 421 | #define EV_SOCK_ARG(x) (x) |
| 422 | #endif |
| 423 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 424 | #if defined(__STDC__) && defined(__STDC_VERSION__) && !defined(__MINGW64_VERSION_MAJOR) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 425 | #if (__STDC_VERSION__ >= 199901L) |
| 426 | #define EV_SIZE_FMT "%zu" |
| 427 | #define EV_SSIZE_FMT "%zd" |
| 428 | #define EV_SIZE_ARG(x) (x) |
| 429 | #define EV_SSIZE_ARG(x) (x) |
| 430 | #endif |
| 431 | #endif |
| 432 | |
| 433 | #ifndef EV_SIZE_FMT |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 434 | #if (EVENT__SIZEOF_SIZE_T <= EVENT__SIZEOF_LONG) |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 435 | #define EV_SIZE_FMT "%lu" |
| 436 | #define EV_SSIZE_FMT "%ld" |
| 437 | #define EV_SIZE_ARG(x) ((unsigned long)(x)) |
| 438 | #define EV_SSIZE_ARG(x) ((long)(x)) |
| 439 | #else |
| 440 | #define EV_SIZE_FMT EV_U64_FMT |
| 441 | #define EV_SSIZE_FMT EV_I64_FMT |
| 442 | #define EV_SIZE_ARG(x) EV_U64_ARG(x) |
| 443 | #define EV_SSIZE_ARG(x) EV_I64_ARG(x) |
| 444 | #endif |
| 445 | #endif |
| 446 | |
Narayan Kamath | fc74cb4 | 2017-09-13 12:53:52 +0100 | [diff] [blame] | 447 | evutil_socket_t evutil_socket_(int domain, int type, int protocol); |
| 448 | evutil_socket_t evutil_accept4_(evutil_socket_t sockfd, struct sockaddr *addr, |
| 449 | ev_socklen_t *addrlen, int flags); |
| 450 | |
| 451 | /* used by one of the test programs.. */ |
| 452 | EVENT2_EXPORT_SYMBOL |
| 453 | int evutil_make_internal_pipe_(evutil_socket_t fd[2]); |
| 454 | evutil_socket_t evutil_eventfd_(unsigned initval, int flags); |
| 455 | |
| 456 | #ifdef SOCK_NONBLOCK |
| 457 | #define EVUTIL_SOCK_NONBLOCK SOCK_NONBLOCK |
| 458 | #else |
| 459 | #define EVUTIL_SOCK_NONBLOCK 0x4000000 |
| 460 | #endif |
| 461 | #ifdef SOCK_CLOEXEC |
| 462 | #define EVUTIL_SOCK_CLOEXEC SOCK_CLOEXEC |
| 463 | #else |
| 464 | #define EVUTIL_SOCK_CLOEXEC 0x80000000 |
| 465 | #endif |
| 466 | #ifdef EFD_NONBLOCK |
| 467 | #define EVUTIL_EFD_NONBLOCK EFD_NONBLOCK |
| 468 | #else |
| 469 | #define EVUTIL_EFD_NONBLOCK 0x4000 |
| 470 | #endif |
| 471 | #ifdef EFD_CLOEXEC |
| 472 | #define EVUTIL_EFD_CLOEXEC EFD_CLOEXEC |
| 473 | #else |
| 474 | #define EVUTIL_EFD_CLOEXEC 0x8000 |
| 475 | #endif |
| 476 | |
Christopher Wiley | e867981 | 2015-07-01 13:36:18 -0700 | [diff] [blame] | 477 | void evutil_memclear_(void *mem, size_t len); |
| 478 | |
| 479 | #ifdef __cplusplus |
| 480 | } |
| 481 | #endif |
| 482 | |
| 483 | #endif |