xref: /netbsd-src/external/bsd/ntp/dist/sntp/libevent/test/regress_bufferevent.c (revision d11b170b9000ada93db553723522a63d5deac310)
1 /*	$NetBSD: regress_bufferevent.c,v 1.1.1.1 2013/12/27 23:31:27 christos Exp $	*/
2 
3 /*
4  * Copyright (c) 2003-2007 Niels Provos <provos@citi.umich.edu>
5  * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  * 3. The name of the author may not be used to endorse or promote products
16  *    derived from this software without specific prior written permission.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 #include "util-internal.h"
30 
31 /* The old tests here need assertions to work. */
32 #undef NDEBUG
33 
34 #ifdef _WIN32
35 #include <winsock2.h>
36 #include <windows.h>
37 #endif
38 
39 #include "event2/event-config.h"
40 
41 #include <sys/types.h>
42 #include <sys/stat.h>
43 #ifdef EVENT__HAVE_SYS_TIME_H
44 #include <sys/time.h>
45 #endif
46 #include <sys/queue.h>
47 #ifndef _WIN32
48 #include <sys/socket.h>
49 #include <sys/wait.h>
50 #include <signal.h>
51 #include <unistd.h>
52 #include <netdb.h>
53 #include <netinet/in.h>
54 #endif
55 #include <fcntl.h>
56 #include <signal.h>
57 #include <stdlib.h>
58 #include <stdio.h>
59 #include <string.h>
60 #include <errno.h>
61 #include <assert.h>
62 
63 #ifdef EVENT__HAVE_ARPA_INET_H
64 #include <arpa/inet.h>
65 #endif
66 
67 #include "event2/event-config.h"
68 #include "event2/event.h"
69 #include "event2/event_struct.h"
70 #include "event2/event_compat.h"
71 #include "event2/tag.h"
72 #include "event2/buffer.h"
73 #include "event2/bufferevent.h"
74 #include "event2/bufferevent_compat.h"
75 #include "event2/bufferevent_struct.h"
76 #include "event2/listener.h"
77 #include "event2/util.h"
78 
79 #include "bufferevent-internal.h"
80 #include "util-internal.h"
81 #ifdef _WIN32
82 #include "iocp-internal.h"
83 #endif
84 
85 #include "regress.h"
86 #include "regress_testutils.h"
87 
88 /*
89  * simple bufferevent test
90  */
91 
92 static void
93 readcb(struct bufferevent *bev, void *arg)
94 {
95 	if (evbuffer_get_length(bev->input) == 8333) {
96 		struct evbuffer *evbuf = evbuffer_new();
97 		assert(evbuf != NULL);
98 
99 		/* gratuitous test of bufferevent_read_buffer */
100 		bufferevent_read_buffer(bev, evbuf);
101 
102 		bufferevent_disable(bev, EV_READ);
103 
104 		if (evbuffer_get_length(evbuf) == 8333) {
105 			test_ok++;
106 		}
107 
108 		evbuffer_free(evbuf);
109 	}
110 }
111 
112 static void
113 writecb(struct bufferevent *bev, void *arg)
114 {
115 	if (evbuffer_get_length(bev->output) == 0) {
116 		test_ok++;
117 	}
118 }
119 
120 static void
121 errorcb(struct bufferevent *bev, short what, void *arg)
122 {
123 	test_ok = -2;
124 }
125 
126 static void
127 test_bufferevent_impl(int use_pair)
128 {
129 	struct bufferevent *bev1 = NULL, *bev2 = NULL;
130 	char buffer[8333];
131 	int i;
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 
176 	event_dispatch();
177 
178 	bufferevent_free(bev1);
179 	tt_ptr_op(bufferevent_pair_get_partner(bev2), ==, NULL);
180 	bufferevent_free(bev2);
181 
182 	if (test_ok != 2)
183 		test_ok = 0;
184 end:
185 	;
186 }
187 
188 static void
189 test_bufferevent(void)
190 {
191 	test_bufferevent_impl(0);
192 }
193 
194 static void
195 test_bufferevent_pair(void)
196 {
197 	test_bufferevent_impl(1);
198 }
199 
200 /*
201  * test watermarks and bufferevent
202  */
203 
204 static void
205 wm_readcb(struct bufferevent *bev, void *arg)
206 {
207 	struct evbuffer *evbuf = evbuffer_new();
208 	int len = (int)evbuffer_get_length(bev->input);
209 	static int nread;
210 
211 	assert(len >= 10 && len <= 20);
212 
213 	assert(evbuf != NULL);
214 
215 	/* gratuitous test of bufferevent_read_buffer */
216 	bufferevent_read_buffer(bev, evbuf);
217 
218 	nread += len;
219 	if (nread == 65000) {
220 		bufferevent_disable(bev, EV_READ);
221 		test_ok++;
222 	}
223 
224 	evbuffer_free(evbuf);
225 }
226 
227 static void
228 wm_writecb(struct bufferevent *bev, void *arg)
229 {
230 	assert(evbuffer_get_length(bev->output) <= 100);
231 	if (evbuffer_get_length(bev->output) == 0) {
232 		evbuffer_drain(bev->output, evbuffer_get_length(bev->output));
233 		test_ok++;
234 	}
235 }
236 
237 static void
238 wm_errorcb(struct bufferevent *bev, short what, void *arg)
239 {
240 	test_ok = -2;
241 }
242 
243 static void
244 test_bufferevent_watermarks_impl(int use_pair)
245 {
246 	struct bufferevent *bev1 = NULL, *bev2 = NULL;
247 	char buffer[65000];
248 	int i;
249 	test_ok = 0;
250 
251 	if (use_pair) {
252 		struct bufferevent *pair[2];
253 		tt_assert(0 == bufferevent_pair_new(NULL, 0, pair));
254 		bev1 = pair[0];
255 		bev2 = pair[1];
256 		bufferevent_setcb(bev1, NULL, wm_writecb, errorcb, NULL);
257 		bufferevent_setcb(bev2, wm_readcb, NULL, errorcb, NULL);
258 	} else {
259 		bev1 = bufferevent_new(pair[0], NULL, wm_writecb, wm_errorcb, NULL);
260 		bev2 = bufferevent_new(pair[1], wm_readcb, NULL, wm_errorcb, NULL);
261 	}
262 	tt_assert(bev1);
263 	tt_assert(bev2);
264 	bufferevent_disable(bev1, EV_READ);
265 	bufferevent_enable(bev2, EV_READ);
266 
267 	for (i = 0; i < (int)sizeof(buffer); i++)
268 		buffer[i] = (char)i;
269 
270 	/* limit the reading on the receiving bufferevent */
271 	bufferevent_setwatermark(bev2, EV_READ, 10, 20);
272 
273 	/* Tell the sending bufferevent not to notify us till it's down to
274 	   100 bytes. */
275 	bufferevent_setwatermark(bev1, EV_WRITE, 100, 2000);
276 
277 	bufferevent_write(bev1, buffer, sizeof(buffer));
278 
279 	event_dispatch();
280 
281 	tt_int_op(test_ok, ==, 2);
282 
283 	/* The write callback drained all the data from outbuf, so we
284 	 * should have removed the write event... */
285 	tt_assert(!event_pending(&bev2->ev_write, EV_WRITE, NULL));
286 
287 end:
288 	if (bev1)
289 		bufferevent_free(bev1);
290 	if (bev2)
291 		bufferevent_free(bev2);
292 }
293 
294 static void
295 test_bufferevent_watermarks(void)
296 {
297 	test_bufferevent_watermarks_impl(0);
298 }
299 
300 static void
301 test_bufferevent_pair_watermarks(void)
302 {
303 	test_bufferevent_watermarks_impl(1);
304 }
305 
306 /*
307  * Test bufferevent filters
308  */
309 
310 /* strip an 'x' from each byte */
311 
312 static enum bufferevent_filter_result
313 bufferevent_input_filter(struct evbuffer *src, struct evbuffer *dst,
314     ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
315 {
316 	const unsigned char *buffer;
317 	unsigned i;
318 
319 	buffer = evbuffer_pullup(src, evbuffer_get_length(src));
320 	for (i = 0; i < evbuffer_get_length(src); i += 2) {
321 		assert(buffer[i] == 'x');
322 		evbuffer_add(dst, buffer + i + 1, 1);
323 
324 		if (i + 2 > evbuffer_get_length(src))
325 			break;
326 	}
327 
328 	evbuffer_drain(src, i);
329 	return (BEV_OK);
330 }
331 
332 /* add an 'x' before each byte */
333 
334 static enum bufferevent_filter_result
335 bufferevent_output_filter(struct evbuffer *src, struct evbuffer *dst,
336     ev_ssize_t lim, enum bufferevent_flush_mode state, void *ctx)
337 {
338 	const unsigned char *buffer;
339 	unsigned i;
340 
341 	buffer = evbuffer_pullup(src, evbuffer_get_length(src));
342 	for (i = 0; i < evbuffer_get_length(src); ++i) {
343 		evbuffer_add(dst, "x", 1);
344 		evbuffer_add(dst, buffer + i, 1);
345 	}
346 
347 	evbuffer_drain(src, evbuffer_get_length(src));
348 	return (BEV_OK);
349 }
350 
351 static void
352 test_bufferevent_filters_impl(int use_pair)
353 {
354 	struct bufferevent *bev1 = NULL, *bev2 = NULL;
355 	struct bufferevent *bev1_base = NULL, *bev2_base = NULL;
356 	char buffer[8333];
357 	int i;
358 
359 	test_ok = 0;
360 
361 	if (use_pair) {
362 		struct bufferevent *pair[2];
363 		tt_assert(0 == bufferevent_pair_new(NULL, 0, pair));
364 		bev1 = pair[0];
365 		bev2 = pair[1];
366 	} else {
367 		bev1 = bufferevent_socket_new(NULL, pair[0], 0);
368 		bev2 = bufferevent_socket_new(NULL, pair[1], 0);
369 	}
370 	bev1_base = bev1;
371 	bev2_base = bev2;
372 
373 	for (i = 0; i < (int)sizeof(buffer); i++)
374 		buffer[i] = i;
375 
376 	bev1 = bufferevent_filter_new(bev1, NULL, bufferevent_output_filter,
377 				      BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
378 
379 	bev2 = bufferevent_filter_new(bev2, bufferevent_input_filter,
380 				      NULL, BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
381 	bufferevent_setcb(bev1, NULL, writecb, errorcb, NULL);
382 	bufferevent_setcb(bev2, readcb, NULL, errorcb, NULL);
383 
384 	tt_ptr_op(bufferevent_get_underlying(bev1), ==, bev1_base);
385 	tt_ptr_op(bufferevent_get_underlying(bev2), ==, bev2_base);
386 	tt_int_op(bufferevent_getfd(bev1), ==, -1);
387 	tt_int_op(bufferevent_getfd(bev2), ==, -1);
388 
389 	bufferevent_disable(bev1, EV_READ);
390 	bufferevent_enable(bev2, EV_READ);
391 	/* insert some filters */
392 	bufferevent_write(bev1, buffer, sizeof(buffer));
393 
394 	event_dispatch();
395 
396 	if (test_ok != 2)
397 		test_ok = 0;
398 
399 end:
400 	if (bev1)
401 		bufferevent_free(bev1);
402 	if (bev2)
403 		bufferevent_free(bev2);
404 
405 }
406 
407 static void
408 test_bufferevent_filters(void)
409 {
410 	test_bufferevent_filters_impl(0);
411 }
412 
413 static void
414 test_bufferevent_pair_filters(void)
415 {
416 	test_bufferevent_filters_impl(1);
417 }
418 
419 
420 static void
421 sender_writecb(struct bufferevent *bev, void *ctx)
422 {
423 	if (evbuffer_get_length(bufferevent_get_output(bev)) == 0) {
424 		bufferevent_disable(bev,EV_READ|EV_WRITE);
425 		bufferevent_free(bev);
426 	}
427 }
428 
429 static void
430 sender_errorcb(struct bufferevent *bev, short what, void *ctx)
431 {
432 	TT_FAIL(("Got sender error %d",(int)what));
433 }
434 
435 static int bufferevent_connect_test_flags = 0;
436 static int n_strings_read = 0;
437 static int n_reads_invoked = 0;
438 
439 #define TEST_STR "Now is the time for all good events to signal for " \
440 	"the good of their protocol"
441 static void
442 listen_cb(struct evconnlistener *listener, evutil_socket_t fd,
443     struct sockaddr *sa, int socklen, void *arg)
444 {
445 	struct event_base *base = arg;
446 	struct bufferevent *bev;
447 	const char s[] = TEST_STR;
448 	TT_BLATHER(("Got a request on socket %d", (int)fd ));
449 	bev = bufferevent_socket_new(base, fd, bufferevent_connect_test_flags);
450 	tt_assert(bev);
451 	bufferevent_setcb(bev, NULL, sender_writecb, sender_errorcb, NULL);
452 	bufferevent_write(bev, s, sizeof(s));
453 end:
454 	;
455 }
456 
457 static void
458 reader_eventcb(struct bufferevent *bev, short what, void *ctx)
459 {
460 	struct event_base *base = ctx;
461 	if (what & BEV_EVENT_ERROR) {
462 		perror("foobar");
463 		TT_FAIL(("got connector error %d", (int)what));
464 		return;
465 	}
466 	if (what & BEV_EVENT_CONNECTED) {
467 		bufferevent_enable(bev, EV_READ);
468 	}
469 	if (what & BEV_EVENT_EOF) {
470 		char buf[512];
471 		size_t n;
472 		n = bufferevent_read(bev, buf, sizeof(buf)-1);
473 		buf[n] = '\0';
474 		tt_str_op(buf, ==, TEST_STR);
475 		if (++n_strings_read == 2)
476 			event_base_loopexit(base, NULL);
477 	}
478 end:
479 	;
480 }
481 
482 static void
483 reader_readcb(struct bufferevent *bev, void *ctx)
484 {
485 	n_reads_invoked++;
486 }
487 
488 static void
489 test_bufferevent_connect(void *arg)
490 {
491 	struct basic_test_data *data = arg;
492 	struct evconnlistener *lev=NULL;
493 	struct bufferevent *bev1=NULL, *bev2=NULL;
494 	struct sockaddr_in localhost;
495 	struct sockaddr_storage ss;
496 	struct sockaddr *sa;
497 	ev_socklen_t slen;
498 
499 	int be_flags=BEV_OPT_CLOSE_ON_FREE;
500 
501 	if (strstr((char*)data->setup_data, "defer")) {
502 		be_flags |= BEV_OPT_DEFER_CALLBACKS;
503 	}
504 	if (strstr((char*)data->setup_data, "unlocked")) {
505 		be_flags |= BEV_OPT_UNLOCK_CALLBACKS;
506 	}
507 	if (strstr((char*)data->setup_data, "lock")) {
508 		be_flags |= BEV_OPT_THREADSAFE;
509 	}
510 	bufferevent_connect_test_flags = be_flags;
511 #ifdef _WIN32
512 	if (!strcmp((char*)data->setup_data, "unset_connectex")) {
513 		struct win32_extension_fns *ext =
514 		    (struct win32_extension_fns *)
515 		    event_get_win32_extension_fns_();
516 		ext->ConnectEx = NULL;
517 	}
518 #endif
519 
520 	memset(&localhost, 0, sizeof(localhost));
521 
522 	localhost.sin_port = 0; /* pick-a-port */
523 	localhost.sin_addr.s_addr = htonl(0x7f000001L);
524 	localhost.sin_family = AF_INET;
525 	sa = (struct sockaddr *)&localhost;
526 	lev = evconnlistener_new_bind(data->base, listen_cb, data->base,
527 	    LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
528 	    16, sa, sizeof(localhost));
529 	tt_assert(lev);
530 
531 	sa = (struct sockaddr *)&ss;
532 	slen = sizeof(ss);
533 	if (regress_get_listener_addr(lev, sa, &slen) < 0) {
534 		tt_abort_perror("getsockname");
535 	}
536 
537 	tt_assert(!evconnlistener_enable(lev));
538 	bev1 = bufferevent_socket_new(data->base, -1, be_flags);
539 	bev2 = bufferevent_socket_new(data->base, -1, be_flags);
540 	tt_assert(bev1);
541 	tt_assert(bev2);
542 	bufferevent_setcb(bev1, reader_readcb,NULL, reader_eventcb, data->base);
543 	bufferevent_setcb(bev2, reader_readcb,NULL, reader_eventcb, data->base);
544 
545 	bufferevent_enable(bev1, EV_READ);
546 	bufferevent_enable(bev2, EV_READ);
547 
548 	tt_want(!bufferevent_socket_connect(bev1, sa, sizeof(localhost)));
549 	tt_want(!bufferevent_socket_connect(bev2, sa, sizeof(localhost)));
550 
551 	event_base_dispatch(data->base);
552 
553 	tt_int_op(n_strings_read, ==, 2);
554 	tt_int_op(n_reads_invoked, >=, 2);
555 end:
556 	if (lev)
557 		evconnlistener_free(lev);
558 
559 	if (bev1)
560 		bufferevent_free(bev1);
561 
562 	if (bev2)
563 		bufferevent_free(bev2);
564 }
565 
566 static void
567 want_fail_eventcb(struct bufferevent *bev, short what, void *ctx)
568 {
569 	struct event_base *base = ctx;
570 	const char *err;
571 	evutil_socket_t s;
572 
573 	if (what & BEV_EVENT_ERROR) {
574 		s = bufferevent_getfd(bev);
575 		err = evutil_socket_error_to_string(evutil_socket_geterror(s));
576 		TT_BLATHER(("connection failure on "EV_SOCK_FMT": %s",
577 			EV_SOCK_ARG(s), err));
578 		test_ok = 1;
579 	} else {
580 		TT_FAIL(("didn't fail? what %hd", what));
581 	}
582 
583 	event_base_loopexit(base, NULL);
584 }
585 
586 static void
587 close_socket_cb(evutil_socket_t fd, short what, void *arg)
588 {
589 	evutil_socket_t *fdp = arg;
590 	if (*fdp >= 0) {
591 		evutil_closesocket(*fdp);
592 		*fdp = -1;
593 	}
594 }
595 
596 static void
597 test_bufferevent_connect_fail(void *arg)
598 {
599 	struct basic_test_data *data = arg;
600 	struct bufferevent *bev=NULL;
601 	struct sockaddr_in localhost;
602 	struct sockaddr *sa = (struct sockaddr*)&localhost;
603 	evutil_socket_t fake_listener = -1;
604 	ev_socklen_t slen = sizeof(localhost);
605 	struct event close_listener_event;
606 	int close_listener_event_added = 0;
607 	struct timeval one_second = { 1, 0 };
608 	int r;
609 
610 	test_ok = 0;
611 
612 	memset(&localhost, 0, sizeof(localhost));
613 	localhost.sin_port = 0; /* have the kernel pick a port */
614 	localhost.sin_addr.s_addr = htonl(0x7f000001L);
615 	localhost.sin_family = AF_INET;
616 
617 	/* bind, but don't listen or accept. should trigger
618 	   "Connection refused" reliably on most platforms. */
619 	fake_listener = socket(localhost.sin_family, SOCK_STREAM, 0);
620 	tt_assert(fake_listener >= 0);
621 	tt_assert(bind(fake_listener, sa, slen) == 0);
622 	tt_assert(getsockname(fake_listener, sa, &slen) == 0);
623 	bev = bufferevent_socket_new(data->base, -1,
624 		BEV_OPT_CLOSE_ON_FREE | BEV_OPT_DEFER_CALLBACKS);
625 	tt_assert(bev);
626 	bufferevent_setcb(bev, NULL, NULL, want_fail_eventcb, data->base);
627 
628 	r = bufferevent_socket_connect(bev, sa, slen);
629 	/* XXXX we'd like to test the '0' case everywhere, but FreeBSD tells
630 	 * detects the error immediately, which is not really wrong of it. */
631 	tt_want(r == 0 || r == -1);
632 
633 	/* Close the listener socket after a second. This should trigger
634 	   "connection refused" on some other platforms, including OSX. */
635 	evtimer_assign(&close_listener_event, data->base, close_socket_cb,
636 	    &fake_listener);
637 	event_add(&close_listener_event, &one_second);
638 	close_listener_event_added = 1;
639 
640 	event_base_dispatch(data->base);
641 
642 	tt_int_op(test_ok, ==, 1);
643 
644 end:
645 	if (fake_listener >= 0)
646 		evutil_closesocket(fake_listener);
647 
648 	if (bev)
649 		bufferevent_free(bev);
650 
651 	if (close_listener_event_added)
652 		event_del(&close_listener_event);
653 }
654 
655 struct timeout_cb_result {
656 	struct timeval read_timeout_at;
657 	struct timeval write_timeout_at;
658 	struct timeval last_wrote_at;
659 	int n_read_timeouts;
660 	int n_write_timeouts;
661 	int total_calls;
662 };
663 
664 static void
665 bev_timeout_write_cb(struct bufferevent *bev, void *arg)
666 {
667 	struct timeout_cb_result *res = arg;
668 	evutil_gettimeofday(&res->last_wrote_at, NULL);
669 }
670 
671 static void
672 bev_timeout_event_cb(struct bufferevent *bev, short what, void *arg)
673 {
674 	struct timeout_cb_result *res = arg;
675 	++res->total_calls;
676 
677 	if ((what & (BEV_EVENT_READING|BEV_EVENT_TIMEOUT))
678 	    == (BEV_EVENT_READING|BEV_EVENT_TIMEOUT)) {
679 		evutil_gettimeofday(&res->read_timeout_at, NULL);
680 		++res->n_read_timeouts;
681 	}
682 	if ((what & (BEV_EVENT_WRITING|BEV_EVENT_TIMEOUT))
683 	    == (BEV_EVENT_WRITING|BEV_EVENT_TIMEOUT)) {
684 		evutil_gettimeofday(&res->write_timeout_at, NULL);
685 		++res->n_write_timeouts;
686 	}
687 }
688 
689 static void
690 test_bufferevent_timeouts(void *arg)
691 {
692 	/* "arg" is a string containing "pair" and/or "filter". */
693 	struct bufferevent *bev1 = NULL, *bev2 = NULL;
694 	struct basic_test_data *data = arg;
695 	int use_pair = 0, use_filter = 0;
696 	struct timeval tv_w, tv_r, started_at;
697 	struct timeout_cb_result res1, res2;
698 	char buf[1024];
699 
700 	memset(&res1, 0, sizeof(res1));
701 	memset(&res2, 0, sizeof(res2));
702 
703 	if (strstr((char*)data->setup_data, "pair"))
704 		use_pair = 1;
705 	if (strstr((char*)data->setup_data, "filter"))
706 		use_filter = 1;
707 
708 	if (use_pair) {
709 		struct bufferevent *p[2];
710 		tt_int_op(0, ==, bufferevent_pair_new(data->base, 0, p));
711 		bev1 = p[0];
712 		bev2 = p[1];
713 	} else {
714 		bev1 = bufferevent_socket_new(data->base, data->pair[0], 0);
715 		bev2 = bufferevent_socket_new(data->base, data->pair[1], 0);
716 	}
717 
718 	tt_assert(bev1);
719 	tt_assert(bev2);
720 
721 	if (use_filter) {
722 		struct bufferevent *bevf1, *bevf2;
723 		bevf1 = bufferevent_filter_new(bev1, NULL, NULL,
724 		    BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
725 		bevf2 = bufferevent_filter_new(bev2, NULL, NULL,
726 		    BEV_OPT_CLOSE_ON_FREE, NULL, NULL);
727 		tt_assert(bevf1);
728 		tt_assert(bevf2);
729 		bev1 = bevf1;
730 		bev2 = bevf2;
731 	}
732 
733 	/* Do this nice and early. */
734 	bufferevent_disable(bev2, EV_READ);
735 
736 	/* bev1 will try to write and read.  Both will time out. */
737 	evutil_gettimeofday(&started_at, NULL);
738 	tv_w.tv_sec = tv_r.tv_sec = 0;
739 	tv_w.tv_usec = 100*1000;
740 	tv_r.tv_usec = 150*1000;
741 	bufferevent_setcb(bev1, NULL, bev_timeout_write_cb,
742 	    bev_timeout_event_cb, &res1);
743 	bufferevent_setwatermark(bev1, EV_WRITE, 1024*1024+10, 0);
744 	bufferevent_set_timeouts(bev1, &tv_r, &tv_w);
745 	if (use_pair) {
746 		/* For a pair, the fact that the other side isn't reading
747 		 * makes the writer stall */
748 		bufferevent_write(bev1, "ABCDEFG", 7);
749 	} else {
750 		/* For a real socket, the kernel's TCP buffers can eat a
751 		 * fair number of bytes; make sure that at some point we
752 		 * have some bytes that will stall. */
753 		struct evbuffer *output = bufferevent_get_output(bev1);
754 		int i;
755 		memset(buf, 0xbb, sizeof(buf));
756 		for (i=0;i<1024;++i) {
757 			evbuffer_add_reference(output, buf, sizeof(buf),
758 			    NULL, NULL);
759 		}
760 	}
761 	bufferevent_enable(bev1, EV_READ|EV_WRITE);
762 
763 	/* bev2 has nothing to say, and isn't listening. */
764 	bufferevent_setcb(bev2, NULL,  bev_timeout_write_cb,
765 	    bev_timeout_event_cb, &res2);
766 	tv_w.tv_sec = tv_r.tv_sec = 0;
767 	tv_w.tv_usec = 200*1000;
768 	tv_r.tv_usec = 100*1000;
769 	bufferevent_set_timeouts(bev2, &tv_r, &tv_w);
770 	bufferevent_enable(bev2, EV_WRITE);
771 
772 	tv_r.tv_sec = 0;
773 	tv_r.tv_usec = 350000;
774 
775 	event_base_loopexit(data->base, &tv_r);
776 	event_base_dispatch(data->base);
777 
778 	/* XXXX Test that actually reading or writing a little resets the
779 	 * timeouts. */
780 
781 	/* Each buf1 timeout happens, and happens only once. */
782 	tt_want(res1.n_read_timeouts);
783 	tt_want(res1.n_write_timeouts);
784 	tt_want(res1.n_read_timeouts == 1);
785 	tt_want(res1.n_write_timeouts == 1);
786 
787 	test_timeval_diff_eq(&started_at, &res1.read_timeout_at, 150);
788 	test_timeval_diff_eq(&started_at, &res1.write_timeout_at, 100);
789 
790 end:
791 	if (bev1)
792 		bufferevent_free(bev1);
793 	if (bev2)
794 		bufferevent_free(bev2);
795 }
796 
797 struct testcase_t bufferevent_testcases[] = {
798 
799 	LEGACY(bufferevent, TT_ISOLATED),
800 	LEGACY(bufferevent_pair, TT_ISOLATED),
801 	LEGACY(bufferevent_watermarks, TT_ISOLATED),
802 	LEGACY(bufferevent_pair_watermarks, TT_ISOLATED),
803 	LEGACY(bufferevent_filters, TT_ISOLATED),
804 	LEGACY(bufferevent_pair_filters, TT_ISOLATED),
805 	{ "bufferevent_connect", test_bufferevent_connect, TT_FORK|TT_NEED_BASE,
806 	  &basic_setup, (void*)"" },
807 	{ "bufferevent_connect_defer", test_bufferevent_connect,
808 	  TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"defer" },
809 	{ "bufferevent_connect_lock", test_bufferevent_connect,
810 	  TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup, (void*)"lock" },
811 	{ "bufferevent_connect_lock_defer", test_bufferevent_connect,
812 	  TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup,
813 	  (void*)"defer lock" },
814 	{ "bufferevent_connect_unlocked_cbs", test_bufferevent_connect,
815 	  TT_FORK|TT_NEED_BASE|TT_NEED_THREADS, &basic_setup,
816 	  (void*)"lock defer unlocked" },
817 	{ "bufferevent_connect_fail", test_bufferevent_connect_fail,
818 	  TT_FORK|TT_NEED_BASE, &basic_setup, NULL },
819 	{ "bufferevent_timeout", test_bufferevent_timeouts,
820 	  TT_FORK|TT_NEED_BASE|TT_NEED_SOCKETPAIR, &basic_setup, (void*)"" },
821 	{ "bufferevent_timeout_pair", test_bufferevent_timeouts,
822 	  TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"pair" },
823 	{ "bufferevent_timeout_filter", test_bufferevent_timeouts,
824 	  TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"filter" },
825 	{ "bufferevent_timeout_filter_pair", test_bufferevent_timeouts,
826 	  TT_FORK|TT_NEED_BASE, &basic_setup, (void*)"filter pair" },
827 #ifdef EVENT__HAVE_LIBZ
828 	LEGACY(bufferevent_zlib, TT_ISOLATED),
829 #else
830 	{ "bufferevent_zlib", NULL, TT_SKIP, NULL, NULL },
831 #endif
832 
833 	END_OF_TESTCASES,
834 };
835 
836 struct testcase_t bufferevent_iocp_testcases[] = {
837 
838 	LEGACY(bufferevent, TT_ISOLATED|TT_ENABLE_IOCP),
839 	LEGACY(bufferevent_watermarks, TT_ISOLATED|TT_ENABLE_IOCP),
840 	LEGACY(bufferevent_filters, TT_ISOLATED|TT_ENABLE_IOCP),
841 	{ "bufferevent_connect", test_bufferevent_connect,
842 	  TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, (void*)"" },
843 	{ "bufferevent_connect_defer", test_bufferevent_connect,
844 	  TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, (void*)"defer" },
845 	{ "bufferevent_connect_lock", test_bufferevent_connect,
846 	  TT_FORK|TT_NEED_BASE|TT_NEED_THREADS|TT_ENABLE_IOCP, &basic_setup,
847 	  (void*)"lock" },
848 	{ "bufferevent_connect_lock_defer", test_bufferevent_connect,
849 	  TT_FORK|TT_NEED_BASE|TT_NEED_THREADS|TT_ENABLE_IOCP, &basic_setup,
850 	  (void*)"defer lock" },
851 	{ "bufferevent_connect_fail", test_bufferevent_connect_fail,
852 	  TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup, NULL },
853 	{ "bufferevent_connect_nonblocking", test_bufferevent_connect,
854 	  TT_FORK|TT_NEED_BASE|TT_ENABLE_IOCP, &basic_setup,
855 	  (void*)"unset_connectex" },
856 
857 	END_OF_TESTCASES,
858 };
859