contrib/libevent/test/regress_bufferevent.c

   1 /*
   2  * Copyright (c) 2003-2007 Niels Provos <provos@citi.umich.edu>
   3  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. The name of the author may not be used to endorse or promote products
  14  *    derived from this software without specific prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26  */
  27 #include "util-internal.h"
  28
  29 /* The old tests here need assertions to work. */
  30 #undef NDEBUG
  31
  32 #ifdef _WIN32
  33 #include <winsock2.h>
  34 #include <windows.h>
  35 #endif
  36
  37 #include "event2/event-config.h"
  38
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #ifdef EVENT__HAVE_SYS_TIME_H
  42 #include <sys/time.h>
  43 #endif
  44 #include <sys/queue.h>
  45 #ifndef _WIN32
  46 #include <sys/socket.h>
  47 #include <sys/wait.h>
  48 #include <signal.h>
  49 #include <unistd.h>
  50 #include <netdb.h>
  51 #include <netinet/in.h>
  52 #endif
  53 #include <fcntl.h>
  54 #include <signal.h>
  55 #include <stdlib.h>
  56 #include <stdio.h>
  57 #include <string.h>
  58 #include <errno.h>
  59 #include <assert.h>
  60
  61 #ifdef EVENT__HAVE_ARPA_INET_H
  62 #include <arpa/inet.h>
  63 #endif
  64
  65 #include "event2/event-config.h"
  66 #include "event2/event.h"
  67 #include "event2/event_struct.h"
  68 #include "event2/event_compat.h"
  69 #include "event2/tag.h"
  70 #include "event2/buffer.h"
  71 #include "event2/bufferevent.h"
  72 #include "event2/bufferevent_compat.h"
  73 #include "event2/bufferevent_struct.h"
  74 #include "event2/listener.h"
  75 #include "event2/util.h"
  76
  77 #include "bufferevent-internal.h"
  78 #include "evthread-internal.h"
  79 #include "util-internal.h"
  80 #ifdef _WIN32
  81 #include "iocp-internal.h"
  82 #endif
  83
  84 #include "regress.h"
  85 #include "regress_testutils.h"
  86
  87 /*
  88  * simple bufferevent test
  89  */
  90
  91 static void
  92 readcb(struct bufferevent *bev, void *arg)
  93 {
  94         if (evbuffer_get_length(bev->input) == 8333) {
  95                 struct evbuffer *evbuf = evbuffer_new();
  96                 assert(evbuf != NULL);
  97
  98                 /* gratuitous test of bufferevent_read_buffer */
  99                 bufferevent_read_buffer(bev, evbuf);
 100
 101                 bufferevent_disable(bev, EV_READ);
 102
 103                 if (evbuffer_get_length(evbuf) == 8333) {
 104                         test_ok++;
 105                 }
 106
 107                 evbuffer_free(evbuf);
 108         }
 109 }
 110
 111 static void
 112 writecb(struct bufferevent *bev, void *arg)
 113 {
 114         if (evbuffer_get_length(bev->output) == 0) {
 115                 test_ok++;
 116         }
 117 }
 118
 119 static void
 120 errorcb(struct bufferevent *bev, short what, void *arg)
 121 {
 122         test_ok = -2;
 123 }
 124
 125 static void
 126 test_bufferevent_impl(int use_pair, int flush)
 127 {
 128         struct bufferevent *bev1 = NULL, *bev2 = NULL;
 129         char buffer[8333];
 130         int i;
 131         int expected = 2;
 132
 133         if (use_pair) {
 134                 struct bufferevent *pair[2];
 135                 tt_assert(0 == bufferevent_pair_new(NULL, 0, pair));
 136                 bev1 = pair[0];
 137                 bev2 = pair[1];
 138                 bufferevent_setcb(bev1, readcb, writecb, errorcb, bev1);
 139                 bufferevent_setcb(bev2, readcb, writecb, errorcb, NULL);
 140                 tt_int_op(bufferevent_getfd(bev1), ==, -1);
 141                 tt_ptr_op(bufferevent_get_underlying(bev1), ==, NULL);
 142                 tt_ptr_op(bufferevent_pair_get_partner(bev1), ==, bev2);
 143                 tt_ptr_op(bufferevent_pair_get_partner(bev2), ==, bev1);
 144         } else {
 145                 bev1 = bufferevent_new(pair[0], readcb, writecb, errorcb, NULL);
 146                 bev2 = bufferevent_new(pair[1], readcb, writecb, errorcb, NULL);
 147                 tt_int_op(bufferevent_getfd(bev1), ==, pair[0]);
 148                 tt_ptr_op(bufferevent_get_underlying(bev1), ==, NULL);
 149                 tt_ptr_op(bufferevent_pair_get_partner(bev1), ==, NULL);
 150                 tt_ptr_op(bufferevent_pair_get_partner(bev2), ==, NULL);
 151         }
 152
 153         {
 154                 /* Test getcb. */
 155                 bufferevent_data_cb r, w;
 156                 bufferevent_event_cb e;
 157                 void *a;
 158                 bufferevent_getcb(bev1, &r, &w, &e, &a);
 159                 tt_ptr_op(r, ==, readcb);
 160                 tt_ptr_op(w, ==, writecb);
 161                 tt_ptr_op(e, ==, errorcb);
 162                 tt_ptr_op(a, ==, use_pair ? bev1 : NULL);
 163         }
 164
 165         bufferevent_disable(bev1, EV_READ);
 166         bufferevent_enable(bev2, EV_READ);
 167
 168         tt_int_op(bufferevent_get_enabled(bev1), ==, EV_WRITE);
 169         tt_int_op(bufferevent_get_enabled(bev2), ==, EV_WRITE|EV_READ);
 170
 171         for (i = 0; i < (int)sizeof(buffer); i++)
 172                 buffer[i] = i;
 173
 174         bufferevent_write(bev1, buffer, sizeof(buffer));
 175         if (flush >= 0) {
 176                 tt_int_op(bufferevent_flush(bev1, EV_WRITE, flush), >=, 0);
 177         }
 178
 179         event_dispatch();
 180
 181         bufferevent_free(bev2);
 182         tt_ptr_op(bufferevent_pair_get_partner(bev1), ==, NULL);
 183         bufferevent_free(bev1);
 184
 185         /** Only pair call errorcb for BEV_FINISHED */
 186         if (use_pair && flush == BEV_FINISHED) {
 187                 expected = -1;
 188         }
 189         if (test_ok != expected)
 190                 test_ok = 0;
 191 end:
 192         ;
 193 }
 194
 195 static void test_bufferevent(void) { test_bufferevent_impl(0, -1); }
 196 static void test_bufferevent_pair(void) { test_bufferevent_impl(1, -1); }
 197
 198 static void test_bufferevent_flush_normal(void) { test_bufferevent_impl(0, BEV_NORMAL); }
 199 static void test_bufferevent_flush_flush(void) { test_bufferevent_impl(0, BEV_FLUSH); }
 200 static void test_bufferevent_flush_finished(void) { test_bufferevent_impl(0, BEV_FINISHED); }
 201
 202 static void test_bufferevent_pair_flush_normal(void) { test_bufferevent_impl(1, BEV_NORMAL); }
 203 static void test_bufferevent_pair_flush_flush(void) { test_bufferevent_impl(1, BEV_FLUSH); }
 204 static void test_bufferevent_pair_flush_finished(void) { test_bufferevent_impl(1, BEV_FINISHED); }
 205
 206 #if defined(EVTHREAD_USE_PTHREADS_IMPLEMENTED)
 207 /**
 208  * Trace lock/unlock/alloc/free for locks.
 209  * (More heavier then evthread_debug*)
 210  */
 211 typedef struct
 212 {
 213         void *lock;
 214         enum {
 215                 ALLOC, FREE,
 216         } status;
 217         size_t locked /** allow recursive locking */;
 218 } lock_wrapper;
 219 struct lock_unlock_base
 220 {
 221         /* Original callbacks */
 222         struct evthread_lock_callbacks cbs;
 223         /* Map of locks */
 224         lock_wrapper *locks;
 225         size_t nr_locks;
 226 } lu_base = {
 227         .locks = NULL,
 228 };
 229
 230 static lock_wrapper *lu_find(void *lock_)
 231 {
 232         size_t i;
 233         for (i = 0; i < lu_base.nr_locks; ++i) {
 234                 lock_wrapper *lock = &lu_base.locks[i];
 235                 if (lock->lock == lock_)
 236                         return lock;
 237         }
 238         return NULL;
 239 }
 240
 241 static void *trace_lock_alloc(unsigned locktype)
 242 {
 243         void *lock;
 244         ++lu_base.nr_locks;
 245         lu_base.locks = realloc(lu_base.locks,
 246                 sizeof(lock_wrapper) * lu_base.nr_locks);
 247         lock = lu_base.cbs.alloc(locktype);
 248         lu_base.locks[lu_base.nr_locks - 1] = (lock_wrapper){ lock, ALLOC, 0 };
 249         return lock;
 250 }
 251 static void trace_lock_free(void *lock_, unsigned locktype)
 252 {
 253         lock_wrapper *lock = lu_find(lock_);
 254         if (!lock || lock->status == FREE || lock->locked) {
 255                 TT_FAIL(("lock: free error"));
 256         } else {
 257                 lock->status = FREE;
 258                 lu_base.cbs.free(lock_, locktype);
 259         }
 260 }
 261 static int trace_lock_lock(unsigned mode, void *lock_)
 262 {
 263         lock_wrapper *lock = lu_find(lock_);
 264         if (!lock || lock->status == FREE) {
 265                 TT_FAIL(("lock: lock error"));
 266                 return -1;
 267         } else {
 268                 ++lock->locked;
 269                 return lu_base.cbs.lock(mode, lock_);
 270         }
 271 }
 272 static int trace_lock_unlock(unsigned mode, void *lock_)
 273 {
 274         lock_wrapper *lock = lu_find(lock_);
 275         if (!lock || lock->status == FREE || !lock->locked) {
 276                 TT_FAIL(("lock: unlock error"));
 277                 return -1;
 278         } else {
 279                 --lock->locked;
 280                 return lu_base.cbs.unlock(mode, lock_);
 281         }
 282 }
 283 static void lock_unlock_free_thread_cbs(void)
 284 {
 285         event_base_free(NULL);
 286
 287         if (libevent_tests_running_in_debug_mode)
 288                 libevent_global_shutdown();
 289
 290         /** drop immutable flag */
 291         evthread_set_lock_callbacks(NULL);
 292         /** avoid calling of event_global_setup_locks_() for new cbs */
 293         libevent_global_shutdown();
 294         /** drop immutable flag for non-debug ops (since called after shutdown) */
 295         evthread_set_lock_callbacks(NULL);
 296 }
 297
 298 static int use_lock_unlock_profiler(void)
 299 {
 300         struct evthread_lock_callbacks cbs = {
 301                 EVTHREAD_LOCK_API_VERSION,
 302                 EVTHREAD_LOCKTYPE_RECURSIVE,
 303                 trace_lock_alloc,
 304                 trace_lock_free,
 305                 trace_lock_lock,
 306                 trace_lock_unlock,
 307         };
 308         memcpy(&lu_base.cbs, evthread_get_lock_callbacks(),
 309                 sizeof(lu_base.cbs));
 310         {
 311                 lock_unlock_free_thread_cbs();
 312
 313                 evthread_set_lock_callbacks(&cbs);
 314                 /** re-create debug locks correctly */
 315                 evthread_enable_lock_debugging();
 316
 317                 event_init();
 318         }
 319         return 0;
 320 }
 321 static void free_lock_unlock_profiler(struct basic_test_data *data)
 322 {
 323         /** fix "held_by" for kqueue */
 324         evthread_set_lock_callbacks(NULL);
 325
 326         lock_unlock_free_thread_cbs();
 327         free(lu_base.locks);
 328         data->base = NULL;
 329 }
 330
 331 static void test_bufferevent_pair_release_lock(void *arg)
 332 {
 333         struct basic_test_data *data = arg;
 334         use_lock_unlock_profiler();
 335         {
 336                 struct bufferevent *pair[2];
 337                 if (!bufferevent_pair_new(NULL, BEV_OPT_THREADSAFE, pair)) {
 338                         bufferevent_free(pair[0]);
 339                         bufferevent_free(pair[1]);
 340                 } else
 341                         tt_abort_perror("bufferevent_pair_new");
 342         }
 343         free_lock_unlock_profiler(data);
 344 end:
 345         ;
 346 }
 347 #endif
 348
 349 /*
 350  * test watermarks and bufferevent
 351  */
 352
 353 static void
 354 wm_readcb(struct bufferevent *bev, void *arg)
 355 {
 356         struct evbuffer *evbuf = evbuffer_new();
 357         int len = (int)evbuffer_get_length(bev->input);
 358         static int nread;
 359
 360         assert(len >= 10 && len <= 20);
 361
 362         assert(evbuf != NULL);
 363
 364         /* gratuitous test of bufferevent_read_buffer */
 365         bufferevent_read_buffer(bev, evbuf);
 366
 367         nread += len;
 368         if (nread == 65000) {
 369                 bufferevent_disable(bev, EV_READ);
 370                 test_ok++;
 371         }
 372
 373         evbuffer_free(evbuf);
 374 }
 375
 376 static void
 377 wm_writecb(struct bufferevent *bev, void *arg)
 378 {
 379         assert(evbuffer_get_length(bev->output) <= 100);
 380         if (evbuffer_get_length(bev->output) == 0) {
 381                 evbuffer_drain(bev->output, evbuffer_get_length(bev->output));
 382                 test_ok++;
 383         }
 384 }
 385
 386 static void
 387 wm_errorcb(struct bufferevent *bev, short what, void *arg)
 388 {
 389         test_ok = -2;
 390 }
 391
 392 static void
 393 test_bufferevent_watermarks_impl(int use_pair)
 394 {
 395         struct bufferevent *bev1 = NULL, *bev2 = NULL;
 396         char buffer[65000];
 397         size_t low, high;
 398         int i;
 399         test_ok = 0;
 400
 401         if (use_pair) {
 402                 struct bufferevent *pair[2];
 403                 tt_assert(0 == bufferevent_pair_new(NULL, 0, pair));
 404                 bev1 = pair[0];
 405                 bev2 = pair[1];
 406                 bufferevent_setcb(bev1, NULL, wm_writecb, errorcb, NULL);
 407                 bufferevent_setcb(bev2, wm_readcb, NULL, errorcb, NULL);
 408         } else {
 409                 bev1 = bufferevent_new(pair[0], NULL, wm_writecb, wm_errorcb, NULL);
 410                 bev2 = bufferevent_new(pair[1], wm_readcb, NULL, wm_errorcb, NULL);
 411         }
 412         tt_assert(bev1);
 413         tt_assert(bev2);
 414         bufferevent_disable(bev1, EV_READ);
 415         bufferevent_enable(bev2, EV_READ);
 416
 417         /* By default, low watermarks are set to 0 */
 418         bufferevent_getwatermark(bev1, EV_READ, &low, NULL);
 419         tt_int_op(low, ==, 0);
 420         bufferevent_getwatermark(bev2, EV_WRITE, &low, NULL);
 421         tt_int_op(low, ==, 0);
 422
 423         for (i = 0; i < (int)sizeof(buffer); i++)
 424                 buffer[i] = (char)i;
 425
 426         /* limit the reading on the receiving bufferevent */
 427         bufferevent_setwatermark(bev2, EV_READ, 10, 20);
 428
 429         bufferevent_getwatermark(bev2, EV_READ, &low, &high);
 430         tt_int_op(low, ==, 10);
 431         tt_int_op(high, ==, 20);
 432
 433         /* Tell the sending bufferevent not to notify us till it's down to
 434            100 bytes. */
 435         bufferevent_setwatermark(bev1, EV_WRITE, 100, 2000);
 436
 437         bufferevent_getwatermark(bev1, EV_WRITE, &low, &high);
 438         tt_int_op(low, ==, 100);
 439         tt_int_op(high, ==, 2000);
 440
 441         {
 442         int r = bufferevent_getwatermark(bev1, EV_WRITE | EV_READ, &low, &high);
 443         tt_int_op(r, !=, 0);
 444         }
 445
 446         bufferevent_write(bev1, buffer, sizeof(buffer));
 447
 448         event_dispatch();
 449
 450         tt_int_op(test_ok, ==, 2);
 451
 452         /* The write callback drained all the data from outbuf, so we
 453          * should have removed the write event... */
 454         tt_assert(!event_pending(&bev2->ev_write, EV_WRITE, NULL));
 455
 456 end:
 457         if (bev1)
 458                 bufferevent_free(bev1);
 459         if (bev2)
 460                 bufferevent_free(bev2);
 461 }
 462
 463 static void
 464 test_bufferevent_watermarks(void)
 465 {
 466         test_bufferevent_watermarks_impl(0);
 467 }
 468
 469 static void
 470 test_bufferevent_pair_watermarks(void)
 471 {
 472         test_bufferevent_watermarks_impl(1);
 473 }
 474
 475 /*
 476  * Test bufferevent filters
 477  */
 478
 479 /* strip an 'x' from each byte */
 480
 481 static enum bufferevent_filter_result
 482 bufferevent_input_filter(struct evbuffer *src, struct evbuffer *dst,
 483     ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
 484 {
 485         const unsigned char *buffer;
 486         unsigned i;
 487
 488         buffer = evbuffer_pullup(src, evbuffer_get_length(src));
 489         for (i = 0; i < evbuffer_get_length(src); i += 2) {
 490                 if (buffer[i] == '-')
 491                         continue;
 492
 493                 assert(buffer[i] == 'x');
 494                 evbuffer_add(dst, buffer + i + 1, 1);
 495         }
 496
 497         evbuffer_drain(src, i);
 498         return (BEV_OK);
 499 }
 500
 501 /* add an 'x' before each byte */
 502
 503 static enum bufferevent_filter_result
 504 bufferevent_output_filter(struct evbuffer *src, struct evbuffer *dst,
 505     ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
 506 {
 507         const unsigned char *buffer;
 508         unsigned i;
 509         struct bufferevent **bevp = ctx;
 510
 511         ++test_ok;
 512
 513         if (test_ok == 1) {
 514                 buffer = evbuffer_pullup(src, evbuffer_get_length(src));
 515                 for (i = 0; i < evbuffer_get_length(src); ++i) {
 516                         evbuffer_add(dst, "x", 1);
 517                         evbuffer_add(dst, buffer + i, 1);
 518                 }
 519                 evbuffer_drain(src, evbuffer_get_length(src));
 520         } else {
 521                 return BEV_ERROR;
 522         }
 523
 524         if (bevp && test_ok == 1) {
 525                 int prev = ++test_ok;
 526                 bufferevent_write(*bevp, "-", 1);
 527                 /* check that during this bufferevent_write()
 528                  * bufferevent_output_filter() will not be called again */
 529                 assert(test_ok == prev);
 530                 --test_ok;
 531         }
 532
 533         return (BEV_OK);
 534 }
 535
 536 static void
 537 test_bufferevent_filters_impl(int use_pair, int disable)
 538 {
 539         struct bufferevent *bev1 = NULL, *bev2 = NULL;
 540         struct bufferevent *bev1_base = NULL, *bev2_base = NULL;
 541         char buffer[8333];
 542         int i;
 543
 544         test_ok = 0;
 545
 546         if (use_pair) {
 547                 struct bufferevent *pair[2];
 548                 tt_assert(0 == bufferevent_pair_new(NULL, 0, pair));
 549                 bev1 = pair[0];
 550                 bev2 = pair[1];
 551         } else {
 552                 bev1 = bufferevent_socket_new(NULL, pair[0], 0);
 553                 bev2 = bufferevent_socket_new(NULL, pair[1], 0);
 554         }
 555         bev1_base = bev1;
 556         bev2_base = bev2;
 557
 558         for (i = 0; i < (int)sizeof(buffer); i++)
 559                 buffer[i] = i;
 560
 561         bev1 = bufferevent_filter_new(bev1, NULL, bufferevent_output_filter,
 562                                       BEV_OPT_CLOSE_ON_FREE, NULL,
 563                                           disable ? &bev1 : NULL);
 564
 565         bev2 = bufferevent_filter_new(bev2, bufferevent_input_filter,
 566                                       NULL, BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
 567         bufferevent_setcb(bev1, NULL, writecb, errorcb, NULL);
 568         bufferevent_setcb(bev2, readcb, NULL, errorcb, NULL);
 569
 570         tt_ptr_op(bufferevent_get_underlying(bev1), ==, bev1_base);
 571         tt_ptr_op(bufferevent_get_underlying(bev2), ==, bev2_base);
 572         tt_int_op(bufferevent_getfd(bev1), ==, -1);
 573         tt_int_op(bufferevent_getfd(bev2), ==, -1);
 574
 575         bufferevent_disable(bev1, EV_READ);
 576         bufferevent_enable(bev2, EV_READ);
 577         /* insert some filters */
 578         bufferevent_write(bev1, buffer, sizeof(buffer));
 579
 580         event_dispatch();
 581
 582         if (test_ok != 3 + !!disable)
 583                 test_ok = 0;
 584
 585 end:
 586         if (bev1)
 587                 bufferevent_free(bev1);
 588         if (bev2)
 589                 bufferevent_free(bev2);
 590
 591 }
 592
 593 static void test_bufferevent_filters(void)
 594 { test_bufferevent_filters_impl(0, 0); }
 595 static void test_bufferevent_pair_filters(void)
 596 { test_bufferevent_filters_impl(1, 0); }
 597 static void test_bufferevent_filters_disable(void)
 598 { test_bufferevent_filters_impl(0, 1); }
 599 static void test_bufferevent_pair_filters_disable(void)
 600 { test_bufferevent_filters_impl(1, 1); }
 601
 602
 603 static void
 604 sender_writecb(struct bufferevent *bev, void *ctx)
 605 {
 606         if (evbuffer_get_length(bufferevent_get_output(bev)) == 0) {
 607                 bufferevent_disable(bev,EV_READ|EV_WRITE);
 608                 TT_BLATHER(("Flushed %d: freeing it.", (int)bufferevent_getfd(bev)));
 609                 bufferevent_free(bev);
 610         }
 611 }
 612
 613 static void
 614 sender_errorcb(struct bufferevent *bev, short what, void *ctx)
 615 {
 616         TT_FAIL(("Got sender error %d",(int)what));
 617 }
 618
 619 static int bufferevent_connect_test_flags = 0;
 620 static int bufferevent_trigger_test_flags = 0;
 621 static int n_strings_read = 0;
 622 static int n_reads_invoked = 0;
 623 static int n_events_invoked = 0;
 624
 625 #define TEST_STR "Now is the time for all good events to signal for " \
 626         "the good of their protocol"
 627 static void
 628 listen_cb(struct evconnlistener *listener, evutil_socket_t fd,
 629     struct sockaddr *sa, int socklen, void *arg)
 630 {
 631         struct event_base *base = arg;
 632         struct bufferevent *bev;
 633         const char s[] = TEST_STR;
 634         TT_BLATHER(("Got a request on socket %d", (int)fd ));
 635         bev = bufferevent_socket_new(base, fd, bufferevent_connect_test_flags);
 636         tt_assert(bev);
 637         bufferevent_setcb(bev, NULL, sender_writecb, sender_errorcb, NULL);
 638         bufferevent_write(bev, s, sizeof(s));
 639 end:
 640         ;
 641 }
 642
 643 static int
 644 fake_listener_create(struct sockaddr_in *localhost)
 645 {
 646         struct sockaddr *sa = (struct sockaddr *)localhost;
 647         evutil_socket_t fd = -1;
 648         ev_socklen_t slen = sizeof(*localhost);
 649
 650         memset(localhost, 0, sizeof(*localhost));
 651         localhost->sin_port = 0; /* have the kernel pick a port */
 652         localhost->sin_addr.s_addr = htonl(0x7f000001L);
 653         localhost->sin_family = AF_INET;
 654
 655         /* bind, but don't listen or accept. should trigger
 656            "Connection refused" reliably on most platforms. */
 657         fd = socket(localhost->sin_family, SOCK_STREAM, 0);
 658         tt_assert(fd >= 0);
 659         tt_assert(bind(fd, sa, slen) == 0);
 660         tt_assert(getsockname(fd, sa, &slen) == 0);
 661
 662         return fd;
 663
 664 end:
 665         return -1;
 666 }
 667
 668 static void
 669 reader_eventcb(struct bufferevent *bev, short what, void *ctx)
 670 {
 671         struct event_base *base = ctx;
 672         if (what & BEV_EVENT_ERROR) {
 673                 perror("foobar");
 674                 TT_FAIL(("got connector error %d", (int)what));
 675                 return;
 676         }
 677         if (what & BEV_EVENT_CONNECTED) {
 678                 TT_BLATHER(("connected on %d", (int)bufferevent_getfd(bev)));
 679                 bufferevent_enable(bev, EV_READ);
 680         }
 681         if (what & BEV_EVENT_EOF) {
 682                 char buf[512];
 683                 size_t n;
 684                 n = bufferevent_read(bev, buf, sizeof(buf)-1);
 685                 tt_int_op(n, >=, 0);
 686                 buf[n] = '\0';
 687                 tt_str_op(buf, ==, TEST_STR);
 688                 if (++n_strings_read == 2)
 689                         event_base_loopexit(base, NULL);
 690                 TT_BLATHER(("EOF on %d: %d strings read.",
 691                         (int)bufferevent_getfd(bev), n_strings_read));
 692         }
 693 end:
 694         ;
 695 }
 696
 697 static void
 698 reader_eventcb_simple(struct bufferevent *bev, short what, void *ctx)
 699 {
 700         TT_BLATHER(("Read eventcb simple invoked on %d.",
 701                 (int)bufferevent_getfd(bev)));
 702         n_events_invoked++;
 703 }
 704
 705 static void
 706 reader_readcb(struct bufferevent *bev, void *ctx)
 707 {
 708         TT_BLATHER(("Read invoked on %d.", (int)bufferevent_getfd(bev)));
 709         n_reads_invoked++;
 710 }
 711
 712 static void
 713 test_bufferevent_connect(void *arg)
 714 {
 715         struct basic_test_data *data = arg;
 716         struct evconnlistener *lev=NULL;
 717         struct bufferevent *bev1=NULL, *bev2=NULL;
 718         struct sockaddr_in localhost;
 719         struct sockaddr_storage ss;
 720         struct sockaddr *sa;
 721         ev_socklen_t slen;
 722
 723         int be_flags=BEV_OPT_CLOSE_ON_FREE;
 724
 725         if (strstr((char*)data->setup_data, "defer")) {
 726                 be_flags |= BEV_OPT_DEFER_CALLBACKS;
 727         }
 728         if (strstr((char*)data->setup_data, "unlocked")) {
 729                 be_flags |= BEV_OPT_UNLOCK_CALLBACKS;
 730         }
 731         if (strstr((char*)data->setup_data, "lock")) {
 732                 be_flags |= BEV_OPT_THREADSAFE;
 733         }
 734         bufferevent_connect_test_flags = be_flags;
 735 #ifdef _WIN32
 736         if (!strcmp((char*)data->setup_data, "unset_connectex")) {
 737                 struct win32_extension_fns *ext =
 738                     (struct win32_extension_fns *)
 739                     event_get_win32_extension_fns_();
 740                 ext->ConnectEx = NULL;
 741         }
 742 #endif
 743
 744         memset(&localhost, 0, sizeof(localhost));
 745
 746         localhost.sin_port = 0; /* pick-a-port */
 747         localhost.sin_addr.s_addr = htonl(0x7f000001L);
 748         localhost.sin_family = AF_INET;
 749         sa = (struct sockaddr *)&localhost;
 750         lev = evconnlistener_new_bind(data->base, listen_cb, data->base,
 751             LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
 752             16, sa, sizeof(localhost));
 753         tt_assert(lev);
 754
 755         sa = (struct sockaddr *)&ss;
 756         slen = sizeof(ss);
 757         if (regress_get_listener_addr(lev, sa, &slen) < 0) {
 758                 tt_abort_perror("getsockname");
 759         }
 760
 761         tt_assert(!evconnlistener_enable(lev));
 762         bev1 = bufferevent_socket_new(data->base, -1, be_flags);
 763         bev2 = bufferevent_socket_new(data->base, -1, be_flags);
 764         tt_assert(bev1);
 765         tt_assert(bev2);
 766         bufferevent_setcb(bev1, reader_readcb,NULL, reader_eventcb, data->base);
 767         bufferevent_setcb(bev2, reader_readcb,NULL, reader_eventcb, data->base);
 768
 769         bufferevent_enable(bev1, EV_READ);
 770         bufferevent_enable(bev2, EV_READ);
 771
 772         tt_want(!bufferevent_socket_connect(bev1, sa, sizeof(localhost)));
 773         tt_want(!bufferevent_socket_connect(bev2, sa, sizeof(localhost)));
 774
 775         event_base_dispatch(data->base);
 776
 777         tt_int_op(n_strings_read, ==, 2);
 778         tt_int_op(n_reads_invoked, >=, 2);
 779 end:
 780         if (lev)
 781                 evconnlistener_free(lev);
 782
 783         if (bev1)
 784                 bufferevent_free(bev1);
 785
 786         if (bev2)
 787                 bufferevent_free(bev2);
 788 }
 789
 790 static void
 791 test_bufferevent_connect_fail_eventcb(void *arg)
 792 {
 793         struct basic_test_data *data = arg;
 794         int flags = BEV_OPT_CLOSE_ON_FREE | (long)data->setup_data;
 795         struct bufferevent *bev = NULL;
 796         struct evconnlistener *lev = NULL;
 797         struct sockaddr_in localhost;
 798         ev_socklen_t slen = sizeof(localhost);
 799         evutil_socket_t fake_listener = -1;
 800
 801         fake_listener = fake_listener_create(&localhost);
 802
 803         tt_int_op(n_events_invoked, ==, 0);
 804
 805         bev = bufferevent_socket_new(data->base, -1, flags);
 806         tt_assert(bev);
 807         bufferevent_setcb(bev, reader_readcb, reader_readcb,
 808                 reader_eventcb_simple, data->base);
 809         bufferevent_enable(bev, EV_READ|EV_WRITE);
 810         tt_int_op(n_events_invoked, ==, 0);
 811         tt_int_op(n_reads_invoked, ==, 0);
 812         /** @see also test_bufferevent_connect_fail() */
 813         bufferevent_socket_connect(bev, (struct sockaddr *)&localhost, slen);
 814         tt_int_op(n_events_invoked, ==, 0);
 815         tt_int_op(n_reads_invoked, ==, 0);
 816         event_base_dispatch(data->base);
 817         tt_int_op(n_events_invoked, ==, 1);
 818         tt_int_op(n_reads_invoked, ==, 0);
 819
 820 end:
 821         if (lev)
 822                 evconnlistener_free(lev);
 823         if (bev)
 824                 bufferevent_free(bev);
 825         if (fake_listener >= 0)
 826                 evutil_closesocket(fake_listener);
 827 }
 828
 829 static void
 830 want_fail_eventcb(struct bufferevent *bev, short what, void *ctx)
 831 {
 832         struct event_base *base = ctx;
 833         const char *err;
 834         evutil_socket_t s;
 835
 836         if (what & BEV_EVENT_ERROR) {
 837                 s = bufferevent_getfd(bev);
 838                 err = evutil_socket_error_to_string(evutil_socket_geterror(s));
 839                 TT_BLATHER(("connection failure on "EV_SOCK_FMT": %s",
 840                         EV_SOCK_ARG(s), err));
 841                 test_ok = 1;
 842         } else {
 843                 TT_FAIL(("didn't fail? what %hd", what));
 844         }
 845
 846         event_base_loopexit(base, NULL);
 847 }
 848
 849 static void
 850 close_socket_cb(evutil_socket_t fd, short what, void *arg)
 851 {
 852         evutil_socket_t *fdp = arg;
 853         if (*fdp >= 0) {
 854                 evutil_closesocket(*fdp);
 855                 *fdp = -1;
 856         }
 857 }
 858
 859 static void
 860 test_bufferevent_connect_fail(void *arg)
 861 {
 862         struct basic_test_data *data = (struct basic_test_data *)arg;
 863         struct bufferevent *bev=NULL;
 864         struct event close_listener_event;
 865         int close_listener_event_added = 0;
 866         struct timeval one_second = { 1, 0 };
 867         struct sockaddr_in localhost;
 868         ev_socklen_t slen = sizeof(localhost);
 869         evutil_socket_t fake_listener = -1;
 870         int r;
 871
 872         test_ok = 0;
 873
 874         fake_listener = fake_listener_create(&localhost);
 875         bev = bufferevent_socket_new(data->base, -1,
 876                 BEV_OPT_CLOSE_ON_FREE | BEV_OPT_DEFER_CALLBACKS);
 877         tt_assert(bev);
 878         bufferevent_setcb(bev, NULL, NULL, want_fail_eventcb, data->base);
 879
 880         r = bufferevent_socket_connect(bev, (struct sockaddr *)&localhost, slen);
 881         /* XXXX we'd like to test the '0' case everywhere, but FreeBSD tells
 882          * detects the error immediately, which is not really wrong of it. */
 883         tt_want(r == 0 || r == -1);
 884
 885         /* Close the listener socket after a second. This should trigger
 886            "connection refused" on some other platforms, including OSX. */
 887         evtimer_assign(&close_listener_event, data->base, close_socket_cb,
 888             &fake_listener);
 889         event_add(&close_listener_event, &one_second);
 890         close_listener_event_added = 1;
 891
 892         event_base_dispatch(data->base);
 893
 894         tt_int_op(test_ok, ==, 1);
 895
 896 end:
 897         if (fake_listener >= 0)
 898                 evutil_closesocket(fake_listener);
 899
 900         if (bev)
 901                 bufferevent_free(bev);
 902
 903         if (close_listener_event_added)
 904                 event_del(&close_listener_event);
 905 }
 906
 907 struct timeout_cb_result {
 908         struct timeval read_timeout_at;
 909         struct timeval write_timeout_at;
 910         struct timeval last_wrote_at;
 911         int n_read_timeouts;
 912         int n_write_timeouts;
 913         int total_calls;
 914 };
 915
 916 static void
 917 bev_timeout_write_cb(struct bufferevent *bev, void *arg)
 918 {
 919         struct timeout_cb_result *res = arg;
 920         evutil_gettimeofday(&res->last_wrote_at, NULL);
 921 }
 922
 923 static void
 924 bev_timeout_event_cb(struct bufferevent *bev, short what, void *arg)
 925 {
 926         struct timeout_cb_result *res = arg;
 927         ++res->total_calls;
 928
 929         if ((what & (BEV_EVENT_READING|BEV_EVENT_TIMEOUT))
 930             == (BEV_EVENT_READING|BEV_EVENT_TIMEOUT)) {
 931                 evutil_gettimeofday(&res->read_timeout_at, NULL);
 932                 ++res->n_read_timeouts;
 933         }
 934         if ((what & (BEV_EVENT_WRITING|BEV_EVENT_TIMEOUT))
 935             == (BEV_EVENT_WRITING|BEV_EVENT_TIMEOUT)) {
 936                 evutil_gettimeofday(&res->write_timeout_at, NULL);
 937                 ++res->n_write_timeouts;
 938         }
 939 }
 940
 941 static void
 942 test_bufferevent_timeouts(void *arg)
 943 {
 944         /* "arg" is a string containing "pair" and/or "filter". */
 945         struct bufferevent *bev1 = NULL, *bev2 = NULL;
 946         struct basic_test_data *data = arg;
 947         int use_pair = 0, use_filter = 0;
 948         struct timeval tv_w, tv_r, started_at;
 949         struct timeout_cb_result res1, res2;
 950         char buf[1024];
 951
 952         memset(&res1, 0, sizeof(res1));
 953         memset(&res2, 0, sizeof(res2));
 954
 955         if (strstr((char*)data->setup_data, "pair"))
 956                 use_pair = 1;
 957         if (strstr((char*)data->setup_data, "filter"))
 958                 use_filter = 1;
 959
 960         if (use_pair) {
 961                 struct bufferevent *p[2];
 962                 tt_int_op(0, ==, bufferevent_pair_new(data->base, 0, p));
 963                 bev1 = p[0];
 964                 bev2 = p[1];
 965         } else {
 966                 bev1 = bufferevent_socket_new(data->base, data->pair[0], 0);
 967                 bev2 = bufferevent_socket_new(data->base, data->pair[1], 0);
 968         }
 969
 970         tt_assert(bev1);
 971         tt_assert(bev2);
 972
 973         if (use_filter) {
 974                 struct bufferevent *bevf1, *bevf2;
 975                 bevf1 = bufferevent_filter_new(bev1, NULL, NULL,
 976                     BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
 977                 bevf2 = bufferevent_filter_new(bev2, NULL, NULL,
 978                     BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
 979                 tt_assert(bevf1);
 980                 tt_assert(bevf2);
 981                 bev1 = bevf1;
 982                 bev2 = bevf2;
 983         }
 984
 985         /* Do this nice and early. */
 986         bufferevent_disable(bev2, EV_READ);
 987
 988         /* bev1 will try to write and read.  Both will time out. */
 989         evutil_gettimeofday(&started_at, NULL);
 990         tv_w.tv_sec = tv_r.tv_sec = 0;
 991         tv_w.tv_usec = 100*1000;
 992         tv_r.tv_usec = 150*1000;
 993         bufferevent_setcb(bev1, NULL, bev_timeout_write_cb,
 994             bev_timeout_event_cb, &res1);
 995         bufferevent_setwatermark(bev1, EV_WRITE, 1024*1024+10, 0);
 996         bufferevent_set_timeouts(bev1, &tv_r, &tv_w);
 997         if (use_pair) {
 998                 /* For a pair, the fact that the other side isn't reading
 999                  * makes the writer stall */
1000                 bufferevent_write(bev1, "ABCDEFG", 7);
1001         } else {
1002                 /* For a real socket, the kernel's TCP buffers can eat a
1003                  * fair number of bytes; make sure that at some point we
1004                  * have some bytes that will stall. */
1005                 struct evbuffer *output = bufferevent_get_output(bev1);
1006                 int i;
1007                 memset(buf, 0xbb, sizeof(buf));
1008                 for (i=0;i<1024;++i) {
1009                         evbuffer_add_reference(output, buf, sizeof(buf),
1010                             NULL, NULL);
1011                 }
1012         }
1013         bufferevent_enable(bev1, EV_READ|EV_WRITE);
1014
1015         /* bev2 has nothing to say, and isn't listening. */
1016         bufferevent_setcb(bev2, NULL,  bev_timeout_write_cb,
1017             bev_timeout_event_cb, &res2);
1018         tv_w.tv_sec = tv_r.tv_sec = 0;
1019         tv_w.tv_usec = 200*1000;
1020         tv_r.tv_usec = 100*1000;
1021         bufferevent_set_timeouts(bev2, &tv_r, &tv_w);
1022         bufferevent_enable(bev2, EV_WRITE);
1023
1024         tv_r.tv_sec = 0;
1025         tv_r.tv_usec = 350000;
1026
1027         event_base_loopexit(data->base, &tv_r);
1028         event_base_dispatch(data->base);
1029
1030         /* XXXX Test that actually reading or writing a little resets the
1031          * timeouts. */
1032
1033         /* Each buf1 timeout happens, and happens only once. */
1034         tt_want(res1.n_read_timeouts);
1035         tt_want(res1.n_write_timeouts);
1036         tt_want(res1.n_read_timeouts == 1);
1037         tt_want(res1.n_write_timeouts == 1);
1038
1039         test_timeval_diff_eq(&started_at, &res1.read_timeout_at, 150);
1040         test_timeval_diff_eq(&started_at, &res1.write_timeout_at, 100);
1041
1042 end:
1043         if (bev1)
1044                 bufferevent_free(bev1);
1045         if (bev2)
1046                 bufferevent_free(bev2);
1047 }
1048
1049 static void
1050 trigger_failure_cb(evutil_socket_t fd, short what, void *ctx)
1051 {
1052         TT_FAIL(("The triggered callback did not fire or the machine is really slow (try increasing timeout)."));
1053 }
1054
1055 static void
1056 trigger_eventcb(struct bufferevent *bev, short what, void *ctx)
1057 {
1058         struct event_base *base = ctx;
1059         if (what == ~0) {
1060                 TT_BLATHER(("Event successfully triggered."));
1061                 event_base_loopexit(base, NULL);
1062                 return;
1063         }
1064         reader_eventcb(bev, what, ctx);
1065 }
1066
1067 static void
1068 trigger_readcb_triggered(struct bufferevent *bev, void *ctx)
1069 {
1070         TT_BLATHER(("Read successfully triggered."));
1071         n_reads_invoked++;
1072         bufferevent_trigger_event(bev, ~0, bufferevent_trigger_test_flags);
1073 }
1074
1075 static void
1076 trigger_readcb(struct bufferevent *bev, void *ctx)
1077 {
1078         struct timeval timeout = { 30, 0 };
1079         struct event_base *base = ctx;
1080         size_t low, high, len;
1081         int expected_reads;
1082
1083         TT_BLATHER(("Read invoked on %d.", (int)bufferevent_getfd(bev)));
1084         expected_reads = ++n_reads_invoked;
1085
1086         bufferevent_setcb(bev, trigger_readcb_triggered, NULL, trigger_eventcb, ctx);
1087
1088         bufferevent_getwatermark(bev, EV_READ, &low, &high);
1089         len = evbuffer_get_length(bufferevent_get_input(bev));
1090
1091         bufferevent_setwatermark(bev, EV_READ, len + 1, 0);
1092         bufferevent_trigger(bev, EV_READ, bufferevent_trigger_test_flags);
1093         /* no callback expected */
1094         tt_int_op(n_reads_invoked, ==, expected_reads);
1095
1096         if ((bufferevent_trigger_test_flags & BEV_TRIG_DEFER_CALLBACKS) ||
1097             (bufferevent_connect_test_flags & BEV_OPT_DEFER_CALLBACKS)) {
1098                 /* will be deferred */
1099         } else {
1100                 expected_reads++;
1101         }
1102
1103         event_base_once(base, -1, EV_TIMEOUT, trigger_failure_cb, NULL, &timeout);
1104
1105         bufferevent_trigger(bev, EV_READ,
1106             bufferevent_trigger_test_flags | BEV_TRIG_IGNORE_WATERMARKS);
1107         tt_int_op(n_reads_invoked, ==, expected_reads);
1108
1109         bufferevent_setwatermark(bev, EV_READ, low, high);
1110 end:
1111         ;
1112 }
1113
1114 static void
1115 test_bufferevent_trigger(void *arg)
1116 {
1117         struct basic_test_data *data = arg;
1118         struct evconnlistener *lev=NULL;
1119         struct bufferevent *bev=NULL;
1120         struct sockaddr_in localhost;
1121         struct sockaddr_storage ss;
1122         struct sockaddr *sa;
1123         ev_socklen_t slen;
1124
1125         int be_flags=BEV_OPT_CLOSE_ON_FREE;
1126         int trig_flags=0;
1127
1128         if (strstr((char*)data->setup_data, "defer")) {
1129                 be_flags |= BEV_OPT_DEFER_CALLBACKS;
1130         }
1131         bufferevent_connect_test_flags = be_flags;
1132
1133         if (strstr((char*)data->setup_data, "postpone")) {
1134                 trig_flags |= BEV_TRIG_DEFER_CALLBACKS;
1135         }
1136         bufferevent_trigger_test_flags = trig_flags;
1137
1138         memset(&localhost, 0, sizeof(localhost));
1139
1140         localhost.sin_port = 0; /* pick-a-port */
1141         localhost.sin_addr.s_addr = htonl(0x7f000001L);
1142         localhost.sin_family = AF_INET;
1143         sa = (struct sockaddr *)&localhost;
1144         lev = evconnlistener_new_bind(data->base, listen_cb, data->base,
1145             LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
1146             16, sa, sizeof(localhost));
1147         tt_assert(lev);
1148
1149         sa = (struct sockaddr *)&ss;
1150         slen = sizeof(ss);
1151         if (regress_get_listener_addr(lev, sa, &slen) < 0) {
1152                 tt_abort_perror("getsockname");
1153         }
1154
1155         tt_assert(!evconnlistener_enable(lev));
1156         bev = bufferevent_socket_new(data->base, -1, be_flags);
1157         tt_assert(bev);
1158         bufferevent_setcb(bev, trigger_readcb, NULL, trigger_eventcb, data->base);
1159
1160         bufferevent_enable(bev, EV_READ);
1161
1162         tt_want(!bufferevent_socket_connect(bev, sa, sizeof(localhost)));
1163
1164         event_base_dispatch(data->base);
1165
1166         tt_int_op(n_reads_invoked, ==, 2);
1167 end:
1168         if (lev)
1169                 evconnlistener_free(lev);
1170
1171         if (bev)
1172                 bufferevent_free(bev);
1173 }
1174
1175 static void
1176 test_bufferevent_socket_filter_inactive(void *arg)
1177 {
1178         struct basic_test_data *data = arg;
1179         struct bufferevent *bev = NULL, *bevf = NULL;
1180
1181         bev = bufferevent_socket_new(data->base, -1, 0);
1182         tt_assert(bev);
1183         bevf = bufferevent_filter_new(bev, NULL, NULL, 0, NULL, NULL);
1184         tt_assert(bevf);
1185
1186 end:
1187         if (bevf)
1188                 bufferevent_free(bevf);
1189         if (bev)
1190                 bufferevent_free(bev);
1191 }
1192
1193 static void
1194 pair_flush_eventcb(struct bufferevent *bev, short what, void *ctx)
1195 {
1196         int *callback_what = ctx;
1197         *callback_what = what;
1198 }
1199
1200 static void
1201 test_bufferevent_pair_flush(void *arg)
1202 {
1203         struct basic_test_data *data = arg;
1204         struct bufferevent *pair[2];
1205         struct bufferevent *bev1 = NULL;
1206         struct bufferevent *bev2 = NULL;
1207         int callback_what = 0;
1208
1209         tt_assert(0 == bufferevent_pair_new(data->base, 0, pair));
1210         bev1 = pair[0];
1211         bev2 = pair[1];
1212         tt_assert(0 == bufferevent_enable(bev1, EV_WRITE));
1213         tt_assert(0 == bufferevent_enable(bev2, EV_READ));
1214
1215         bufferevent_setcb(bev2, NULL, NULL, pair_flush_eventcb, &callback_what);
1216
1217         bufferevent_flush(bev1, EV_WRITE, BEV_FINISHED);
1218
1219         event_base_loop(data->base, EVLOOP_ONCE);
1220
1221         tt_assert(callback_what == (BEV_EVENT_READING | BEV_EVENT_EOF));
1222
1223 end:
1224         if (bev1)
1225                 bufferevent_free(bev1);
1226         if (bev2)
1227                 bufferevent_free(bev2);
1228 }
1229
1230 struct bufferevent_filter_data_stuck {
1231         size_t header_size;
1232         size_t total_read;
1233 };
1234
1235 static void
1236 bufferevent_filter_data_stuck_readcb(struct bufferevent *bev, void *arg)
1237 {
1238         struct bufferevent_filter_data_stuck *filter_data = arg;
1239         struct evbuffer *input = bufferevent_get_input(bev);
1240         size_t read_size = evbuffer_get_length(input);
1241         evbuffer_drain(input, read_size);
1242         filter_data->total_read += read_size;
1243 }
1244
1245 /**
1246  * This filter prepends header once before forwarding data.
1247  */
1248 static enum bufferevent_filter_result
1249 bufferevent_filter_data_stuck_inputcb(
1250     struct evbuffer *src, struct evbuffer *dst, ev_ssize_t dst_limit,
1251     enum bufferevent_flush_mode mode, void *ctx)
1252 {
1253         struct bufferevent_filter_data_stuck *filter_data = ctx;
1254         static int header_inserted = 0;
1255         size_t payload_size;
1256         size_t header_size = 0;
1257
1258         if (!header_inserted) {
1259                 char *header = calloc(filter_data->header_size, 1);
1260                 evbuffer_add(dst, header, filter_data->header_size);
1261                 free(header);
1262                 header_size = filter_data->header_size;
1263                 header_inserted = 1;
1264         }
1265
1266         payload_size = evbuffer_get_length(src);
1267         if (payload_size > dst_limit - header_size) {
1268                 payload_size = dst_limit - header_size;
1269         }
1270
1271         tt_int_op(payload_size, ==, evbuffer_remove_buffer(src, dst, payload_size));
1272
1273 end:
1274         return BEV_OK;
1275 }
1276
1277 static void
1278 test_bufferevent_filter_data_stuck(void *arg)
1279 {
1280         const size_t read_high_wm = 4096;
1281         struct bufferevent_filter_data_stuck filter_data;
1282         struct basic_test_data *data = arg;
1283         struct bufferevent *pair[2];
1284         struct bufferevent *filter = NULL;
1285
1286         int options = BEV_OPT_CLOSE_ON_FREE | BEV_OPT_DEFER_CALLBACKS;
1287
1288         char payload[4096];
1289         int payload_size = sizeof(payload);
1290
1291         memset(&filter_data, 0, sizeof(filter_data));
1292         filter_data.header_size = 20;
1293
1294         tt_assert(bufferevent_pair_new(data->base, options, pair) == 0);
1295
1296         bufferevent_setwatermark(pair[0], EV_READ, 0, read_high_wm);
1297         bufferevent_setwatermark(pair[1], EV_READ, 0, read_high_wm);
1298
1299         tt_assert(
1300                 filter =
1301                  bufferevent_filter_new(pair[1],
1302                  bufferevent_filter_data_stuck_inputcb,
1303                  NULL,
1304                  options,
1305                  NULL,
1306                  &filter_data));
1307
1308         bufferevent_setcb(filter,
1309                 bufferevent_filter_data_stuck_readcb,
1310                 NULL,
1311                 NULL,
1312                 &filter_data);
1313
1314         tt_assert(bufferevent_enable(filter, EV_READ|EV_WRITE) == 0);
1315
1316         bufferevent_setwatermark(filter, EV_READ, 0, read_high_wm);
1317
1318         tt_assert(bufferevent_write(pair[0], payload, sizeof(payload)) == 0);
1319
1320         event_base_dispatch(data->base);
1321
1322         tt_int_op(filter_data.total_read, ==, payload_size + filter_data.header_size);
1323 end:
1324         if (pair[0])
1325                 bufferevent_free(pair[0]);
1326         if (filter)
1327                 bufferevent_free(filter);
1328 }
1329
1330 struct testcase_t bufferevent_testcases[] = {
1331
1332         LEGACY(bufferevent, TT_ISOLATED),
1333         LEGACY(bufferevent_pair, TT_ISOLATED),
1334         LEGACY(bufferevent_flush_normal, TT_ISOLATED),
1335         LEGACY(bufferevent_flush_flush, TT_ISOLATED),
1336         LEGACY(bufferevent_flush_finished, TT_ISOLATED),
1337         LEGACY(bufferevent_pair_flush_normal, TT_ISOLATED),
1338         LEGACY(bufferevent_pair_flush_flush, TT_ISOLATED),
1339         LEGACY(bufferevent_pair_flush_finished, TT_ISOLATED),
1340 #if defined(EVTHREAD_USE_PTHREADS_IMPLEMENTED)
1341         { "bufferevent_pair_release_lock", test_bufferevent_pair_release_lock,
1342           TT_FORK|TT_ISOLATED|TT_NEED_THREADS|TT_NEED_BASE|TT_LEGACY,
1343           &basic_setup, NULL },
1344 #endif
1345         LEGACY(bufferevent_watermarks, TT_ISOLATED),
1346         LEGACY(bufferevent_pair_watermarks, TT_ISOLATED),
1347         LEGACY(bufferevent_filters, TT_ISOLATED),
1348         LEGACY(bufferevent_pair_filters, TT_ISOLATED),
1349         LEGACY(bufferevent_filters_disable, TT_ISOLATED),
1350         LEGACY(bufferevent_pair_filters_disable, TT_ISOLATED),
1351         { "bufferevent_connect", test_bufferevent_connect, TT_FORK|TT_NEED_BASE,
1352           &basic_setup, (void*)"" },
1353         { "bufferevent_connect_defer", test_bufferevent_connect,
1354           TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"defer" },
1355         { "bufferevent_connect_lock", test_bufferevent_connect,
1356           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup, (void*)"lock" },
1357         { "bufferevent_connect_lock_defer", test_bufferevent_connect,
1358           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup,
1359           (void*)"defer lock" },
1360         { "bufferevent_connect_unlocked_cbs", test_bufferevent_connect,
1361           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup,
1362           (void*)"lock defer unlocked" },
1363         { "bufferevent_connect_fail", test_bufferevent_connect_fail,
1364           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1365         { "bufferevent_timeout", test_bufferevent_timeouts,
1366           TT_FORK|TT_NEED_BASE|TT_NEED_SOCKETPAIR, &basic_setup, (void*)"" },
1367         { "bufferevent_timeout_pair", test_bufferevent_timeouts,
1368           TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"pair" },
1369         { "bufferevent_timeout_filter", test_bufferevent_timeouts,
1370           TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"filter" },
1371         { "bufferevent_timeout_filter_pair", test_bufferevent_timeouts,
1372           TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"filter pair" },
1373         { "bufferevent_trigger", test_bufferevent_trigger, TT_FORK|TT_NEED_BASE,
1374           &basic_setup, (void*)"" },
1375         { "bufferevent_trigger_defer", test_bufferevent_trigger,
1376           TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"defer" },
1377         { "bufferevent_trigger_postpone", test_bufferevent_trigger,
1378           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup,
1379           (void*)"postpone" },
1380         { "bufferevent_trigger_defer_postpone", test_bufferevent_trigger,
1381           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup,
1382           (void*)"defer postpone" },
1383 #ifdef EVENT__HAVE_LIBZ
1384         LEGACY(bufferevent_zlib, TT_ISOLATED),
1385 #else
1386         { "bufferevent_zlib", NULL, TT_SKIP, NULL, NULL },
1387 #endif
1388
1389         { "bufferevent_connect_fail_eventcb_defer",
1390           test_bufferevent_connect_fail_eventcb,
1391           TT_FORK|TT_NEED_BASE, &basic_setup, (void*)BEV_OPT_DEFER_CALLBACKS },
1392         { "bufferevent_connect_fail_eventcb",
1393           test_bufferevent_connect_fail_eventcb,
1394           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1395
1396         { "bufferevent_socket_filter_inactive",
1397           test_bufferevent_socket_filter_inactive,
1398           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1399         { "bufferevent_pair_flush",
1400           test_bufferevent_pair_flush,
1401           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1402         { "bufferevent_filter_data_stuck",
1403           test_bufferevent_filter_data_stuck,
1404           TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
1405
1406         END_OF_TESTCASES,
1407 };
1408
1409 struct testcase_t bufferevent_iocp_testcases[] = {
1410
1411         LEGACY(bufferevent, TT_ISOLATED|TT_ENABLE_IOCP),
1412         LEGACY(bufferevent_flush_normal, TT_ISOLATED),
1413         LEGACY(bufferevent_flush_flush, TT_ISOLATED),
1414         LEGACY(bufferevent_flush_finished, TT_ISOLATED),
1415         LEGACY(bufferevent_watermarks, TT_ISOLATED|TT_ENABLE_IOCP),
1416         LEGACY(bufferevent_filters, TT_ISOLATED|TT_ENABLE_IOCP),
1417         LEGACY(bufferevent_filters_disable, TT_ISOLATED|TT_ENABLE_IOCP),
1418         { "bufferevent_connect", test_bufferevent_connect,
1419           TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, (void*)"" },
1420         { "bufferevent_connect_defer", test_bufferevent_connect,
1421           TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, (void*)"defer" },
1422         { "bufferevent_connect_lock", test_bufferevent_connect,
1423           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS|TT_ENABLE_IOCP, &basic_setup,
1424           (void*)"lock" },
1425         { "bufferevent_connect_lock_defer", test_bufferevent_connect,
1426           TT_FORK|TT_NEED_BASE|TT_NEED_THREADS|TT_ENABLE_IOCP, &basic_setup,
1427           (void*)"defer lock" },
1428         { "bufferevent_connect_fail", test_bufferevent_connect_fail,
1429           TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, NULL },
1430         { "bufferevent_connect_nonblocking", test_bufferevent_connect,
1431           TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup,
1432           (void*)"unset_connectex" },
1433
1434         { "bufferevent_connect_fail_eventcb_defer",
1435           test_bufferevent_connect_fail_eventcb,
1436           TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup,
1437           (void*)BEV_OPT_DEFER_CALLBACKS },
1438         { "bufferevent_connect_fail_eventcb",
1439           test_bufferevent_connect_fail_eventcb,
1440           TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, NULL },
1441
1442         END_OF_TESTCASES,
1443 };