test-fdleak.c revision 290001 
1/*
2 * Copyright (c) 2012 Ross Lagerwall <rosslagerwall@gmail.com>
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. The name of the author may not be used to endorse or promote products
13 *    derived from this software without specific prior written permission.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "event2/event-config.h"
28
29#ifdef _WIN32
30#define WIN32_LEAN_AND_MEAN
31#include <windows.h>
32#endif
33#include <string.h>
34#include <stdlib.h>
35#include <errno.h>
36#ifdef EVENT__HAVE_SYS_TIME_H
37#include <sys/time.h>
38#endif
39#ifdef EVENT__HAVE_SYS_RESOURCE_H
40#include <sys/resource.h>
41#endif
42#ifdef EVENT__HAVE_NETINET_IN_H
43#include <netinet/in.h>
44#endif
45
46#include "event2/event.h"
47#include "event2/bufferevent.h"
48#include "event2/buffer.h"
49#include "event2/listener.h"
50
51/* Number of requests to make. Setting this too high might result in the machine
52   running out of ephemeral ports */
53#ifdef _WIN32
54#define MAX_REQUESTS 1000
55#else
56#define MAX_REQUESTS 4000
57#endif
58
59/* Provide storage for the address, both for the server & the clients */
60static struct sockaddr_in saddr;
61
62/* Number of sucessful requests so far */
63static int num_requests;
64
65static void start_client(struct event_base *base);
66
67static void
68my_perror(const char *s)
69{
70	fprintf(stderr, "%s: %s",
71	    s, evutil_socket_error_to_string(EVUTIL_SOCKET_ERROR()));
72}
73
74/*
75===============================================
76Server functions
77===============================================
78*/
79
80/* Read a byte from the client and write it back */
81static void
82server_read_cb(struct bufferevent *bev, void *ctx)
83{
84	while (evbuffer_get_length(bufferevent_get_input(bev))) {
85		unsigned char tmp;
86		bufferevent_read(bev, &tmp, 1);
87		bufferevent_write(bev, &tmp, 1);
88	}
89}
90
91/* Wait for an EOF and then free the bufferevent */
92static void
93server_event_cb(struct bufferevent *bev, short events, void *ctx)
94{
95	if (events & BEV_EVENT_ERROR) {
96		my_perror("Error from bufferevent");
97		exit(1);
98	} else if (events & (BEV_EVENT_EOF | BEV_EVENT_ERROR)) {
99		bufferevent_free(bev);
100	}
101}
102
103/* Accept a client socket and set it up to for reading & writing */
104static void
105listener_accept_cb(struct evconnlistener *listener, evutil_socket_t sock,
106                   struct sockaddr *addr, int len, void *ptr)
107{
108	struct event_base *base = evconnlistener_get_base(listener);
109	struct bufferevent *bev = bufferevent_socket_new(base, sock,
110                                                         BEV_OPT_CLOSE_ON_FREE);
111
112	bufferevent_setcb(bev, server_read_cb, NULL, server_event_cb, NULL);
113	bufferevent_enable(bev, EV_READ|EV_WRITE);
114}
115
116/* Start the server listening on a random port and start the first client. */
117static void
118start_loop(void)
119{
120	struct event_base *base;
121	struct evconnlistener *listener;
122	struct sockaddr_storage ss;
123	ev_socklen_t socklen = sizeof(ss);
124	evutil_socket_t fd;
125
126	base = event_base_new();
127	if (base == NULL) {
128		puts("Could not open event base!");
129		exit(1);
130	}
131
132	listener = evconnlistener_new_bind(base, listener_accept_cb, NULL,
133	    LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
134	    -1, (struct sockaddr *)&saddr, sizeof(saddr));
135	if (listener == NULL) {
136		my_perror("Could not create listener!");
137		exit(1);
138	}
139	fd = evconnlistener_get_fd(listener);
140	if (fd < 0) {
141		puts("Couldn't get fd from listener");
142		exit(1);
143	}
144	if (getsockname(fd, (struct sockaddr *)&ss, &socklen) < 0) {
145		my_perror("getsockname()");
146		exit(1);
147	}
148	memcpy(&saddr, &ss, sizeof(saddr));
149	if (saddr.sin_family != AF_INET) {
150		puts("AF mismatch from getsockname().");
151		exit(1);
152	}
153
154	start_client(base);
155
156	event_base_dispatch(base);
157}
158
159/*
160===============================================
161Client functions
162===============================================
163*/
164
165/* Check that the server sends back the same byte that the client sent.
166   If MAX_REQUESTS have been reached, exit. Otherwise, start another client. */
167static void
168client_read_cb(struct bufferevent *bev, void *ctx)
169{
170	unsigned char tmp;
171	struct event_base *base = bufferevent_get_base(bev);
172
173	bufferevent_read(bev, &tmp, 1);
174	if (tmp != 'A') {
175		puts("Incorrect data received!");
176		exit(2);
177	}
178	bufferevent_free(bev);
179
180	num_requests++;
181	if (num_requests == MAX_REQUESTS) {
182		event_base_loopbreak(base);
183	} else {
184		start_client(base);
185	}
186}
187
188/* Send a byte to the server. */
189static void
190client_event_cb(struct bufferevent *bev, short events, void *ctx)
191{
192	if (events & BEV_EVENT_CONNECTED) {
193		unsigned char tmp = 'A';
194		bufferevent_write(bev, &tmp, 1);
195	} else if (events & BEV_EVENT_ERROR) {
196		puts("Client socket got error!");
197		exit(2);
198	}
199
200	bufferevent_enable(bev, EV_READ);
201}
202
203/* Open a client socket to connect to localhost on sin */
204static void
205start_client(struct event_base *base)
206{
207	struct bufferevent *bev = bufferevent_socket_new(base, -1,
208                                                         BEV_OPT_CLOSE_ON_FREE);
209	bufferevent_setcb(bev, client_read_cb, NULL, client_event_cb, NULL);
210
211	if (bufferevent_socket_connect(bev, (struct sockaddr *)&saddr,
212                                       sizeof(saddr)) < 0) {
213		my_perror("Could not connect!");
214		bufferevent_free(bev);
215		exit(2);
216	}
217}
218
219int
220main(int argc, char **argv)
221{
222#ifdef EVENT__HAVE_SETRLIMIT
223	/* Set the fd limit to a low value so that any fd leak is caught without
224	making many requests. */
225	struct rlimit rl;
226	rl.rlim_cur = rl.rlim_max = 20;
227	if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
228		my_perror("setrlimit");
229		exit(3);
230	}
231#endif
232
233#ifdef _WIN32
234	WSADATA WSAData;
235	WSAStartup(0x101, &WSAData);
236#endif
237
238	/* Set up an address, used by both client & server. */
239	memset(&saddr, 0, sizeof(saddr));
240	saddr.sin_family = AF_INET;
241	saddr.sin_addr.s_addr = htonl(0x7f000001);
242	saddr.sin_port = 0; /* Tell the implementation to pick a port. */
243
244	start_loop();
245
246	return 0;
247}
248
249/* XXX why does this test cause so much latency sometimes (OSX 10.5)? */
250