test-fdleak.c revision 1.4 
1/*	$NetBSD: test-fdleak.c,v 1.4 2015/07/10 14:20:35 christos Exp $	*/
2
3/*
4 * Copyright (c) 2012 Ross Lagerwall <rosslagerwall@gmail.com>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include "event2/event-config.h"
30
31#ifdef _WIN32
32#define WIN32_LEAN_AND_MEAN
33#include <windows.h>
34#endif
35#include <string.h>
36#include <stdlib.h>
37#include <errno.h>
38#ifdef EVENT__HAVE_SYS_TIME_H
39#include <sys/time.h>
40#endif
41#ifdef EVENT__HAVE_SYS_RESOURCE_H
42#include <sys/resource.h>
43#endif
44#ifdef EVENT__HAVE_NETINET_IN_H
45#include <netinet/in.h>
46#endif
47
48#include "event2/event.h"
49#include "event2/bufferevent.h"
50#include "event2/buffer.h"
51#include "event2/listener.h"
52
53/* Number of requests to make. Setting this too high might result in the machine
54   running out of ephemeral ports */
55#ifdef _WIN32
56#define MAX_REQUESTS 1000
57#else
58#define MAX_REQUESTS 4000
59#endif
60
61/* Provide storage for the address, both for the server & the clients */
62static struct sockaddr_in saddr;
63
64/* Number of sucessful requests so far */
65static int num_requests;
66
67static void start_client(struct event_base *base);
68
69static void
70my_perror(const char *s)
71{
72	fprintf(stderr, "%s: %s",
73	    s, evutil_socket_error_to_string(EVUTIL_SOCKET_ERROR()));
74}
75
76/*
77===============================================
78Server functions
79===============================================
80*/
81
82/* Read a byte from the client and write it back */
83static void
84server_read_cb(struct bufferevent *bev, void *ctx)
85{
86	while (evbuffer_get_length(bufferevent_get_input(bev))) {
87		unsigned char tmp;
88		bufferevent_read(bev, &tmp, 1);
89		bufferevent_write(bev, &tmp, 1);
90	}
91}
92
93/* Wait for an EOF and then free the bufferevent */
94static void
95server_event_cb(struct bufferevent *bev, short events, void *ctx)
96{
97	if (events & BEV_EVENT_ERROR) {
98		my_perror("Error from bufferevent");
99		exit(1);
100	} else if (events & (BEV_EVENT_EOF | BEV_EVENT_ERROR)) {
101		bufferevent_free(bev);
102	}
103}
104
105/* Accept a client socket and set it up to for reading & writing */
106static void
107listener_accept_cb(struct evconnlistener *listener, evutil_socket_t sock,
108                   struct sockaddr *addr, int len, void *ptr)
109{
110	struct event_base *base = evconnlistener_get_base(listener);
111	struct bufferevent *bev = bufferevent_socket_new(base, sock,
112                                                         BEV_OPT_CLOSE_ON_FREE);
113
114	bufferevent_setcb(bev, server_read_cb, NULL, server_event_cb, NULL);
115	bufferevent_enable(bev, EV_READ|EV_WRITE);
116}
117
118/* Start the server listening on a random port and start the first client. */
119static void
120start_loop(void)
121{
122	struct event_base *base;
123	struct evconnlistener *listener;
124	struct sockaddr_storage ss;
125	ev_socklen_t socklen = sizeof(ss);
126	evutil_socket_t fd;
127
128	base = event_base_new();
129	if (base == NULL) {
130		puts("Could not open event base!");
131		exit(1);
132	}
133
134	listener = evconnlistener_new_bind(base, listener_accept_cb, NULL,
135	    LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
136	    -1, (struct sockaddr *)&saddr, sizeof(saddr));
137	if (listener == NULL) {
138		my_perror("Could not create listener!");
139		exit(1);
140	}
141	fd = evconnlistener_get_fd(listener);
142	if (fd < 0) {
143		puts("Couldn't get fd from listener");
144		exit(1);
145	}
146	if (getsockname(fd, (struct sockaddr *)&ss, &socklen) < 0) {
147		my_perror("getsockname()");
148		exit(1);
149	}
150	memcpy(&saddr, &ss, sizeof(saddr));
151	if (saddr.sin_family != AF_INET) {
152		puts("AF mismatch from getsockname().");
153		exit(1);
154	}
155
156	start_client(base);
157
158	event_base_dispatch(base);
159}
160
161/*
162===============================================
163Client functions
164===============================================
165*/
166
167/* Check that the server sends back the same byte that the client sent.
168   If MAX_REQUESTS have been reached, exit. Otherwise, start another client. */
169static void
170client_read_cb(struct bufferevent *bev, void *ctx)
171{
172	unsigned char tmp;
173	struct event_base *base = bufferevent_get_base(bev);
174
175	bufferevent_read(bev, &tmp, 1);
176	if (tmp != 'A') {
177		puts("Incorrect data received!");
178		exit(2);
179	}
180	bufferevent_free(bev);
181
182	num_requests++;
183	if (num_requests == MAX_REQUESTS) {
184		event_base_loopbreak(base);
185	} else {
186		start_client(base);
187	}
188}
189
190/* Send a byte to the server. */
191static void
192client_event_cb(struct bufferevent *bev, short events, void *ctx)
193{
194	if (events & BEV_EVENT_CONNECTED) {
195		unsigned char tmp = 'A';
196		bufferevent_write(bev, &tmp, 1);
197	} else if (events & BEV_EVENT_ERROR) {
198		puts("Client socket got error!");
199		exit(2);
200	}
201
202	bufferevent_enable(bev, EV_READ);
203}
204
205/* Open a client socket to connect to localhost on sin */
206static void
207start_client(struct event_base *base)
208{
209	struct bufferevent *bev = bufferevent_socket_new(base, -1,
210                                                         BEV_OPT_CLOSE_ON_FREE);
211	bufferevent_setcb(bev, client_read_cb, NULL, client_event_cb, NULL);
212
213	if (bufferevent_socket_connect(bev, (struct sockaddr *)&saddr,
214                                       sizeof(saddr)) < 0) {
215		my_perror("Could not connect!");
216		bufferevent_free(bev);
217		exit(2);
218	}
219}
220
221int
222main(int argc, char **argv)
223{
224#ifdef EVENT__HAVE_SETRLIMIT
225	/* Set the fd limit to a low value so that any fd leak is caught without
226	making many requests. */
227	struct rlimit rl;
228	rl.rlim_cur = rl.rlim_max = 20;
229	if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
230		my_perror("setrlimit");
231		exit(3);
232	}
233#endif
234
235#ifdef _WIN32
236	WSADATA WSAData;
237	WSAStartup(0x101, &WSAData);
238#endif
239
240	/* Set up an address, used by both client & server. */
241	memset(&saddr, 0, sizeof(saddr));
242	saddr.sin_family = AF_INET;
243	saddr.sin_addr.s_addr = htonl(0x7f000001);
244	saddr.sin_port = 0; /* Tell the implementation to pick a port. */
245
246	start_loop();
247
248	return 0;
249}
250
251/* XXX why does this test cause so much latency sometimes (OSX 10.5)? */
252