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      1 /*
      2  * Copyright (c) 2003-2007 Niels Provos <provos (at) 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 };
   1444