1 /* $NetBSD: test-fdleak.c,v 1.1.1.2 2021/04/07 02:43:15 christos Exp $ */
2 /*
3 * Copyright (c) 2012 Ross Lagerwall <rosslagerwall@gmail.com>
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
28 #include "event2/event-config.h"
29 #include <sys/cdefs.h>
30 __RCSID("$NetBSD: test-fdleak.c,v 1.1.1.2 2021/04/07 02:43:15 christos Exp $");
31
32 #ifdef _WIN32
33 #define WIN32_LEAN_AND_MEAN
34 #include <windows.h>
35 #endif
36 #include <string.h>
37 #include <stdlib.h>
38 #include <errno.h>
39 #ifdef EVENT__HAVE_SYS_TIME_H
40 #include <sys/time.h>
41 #endif
42 #ifdef EVENT__HAVE_SYS_RESOURCE_H
43 #include <sys/resource.h>
44 #endif
45 #ifdef EVENT__HAVE_NETINET_IN_H
46 #include <netinet/in.h>
47 #endif
48
49 #include "event2/event.h"
50 #include "event2/bufferevent.h"
51 #include "event2/buffer.h"
52 #include "event2/listener.h"
53
54 /* Number of requests to make. Setting this too high might result in the machine
55 running out of ephemeral ports */
56 #ifdef _WIN32
57 #define MAX_REQUESTS 1000
58 #else
59 #define MAX_REQUESTS 4000
60 #endif
61
62 /* Provide storage for the address, both for the server & the clients */
63 static struct sockaddr_in saddr;
64
65 /* Number of sucessful requests so far */
66 static int num_requests;
67
68 static void start_client(struct event_base *base);
69
70 static void
my_perror(const char * s)71 my_perror(const char *s)
72 {
73 fprintf(stderr, "%s: %s",
74 s, evutil_socket_error_to_string(EVUTIL_SOCKET_ERROR()));
75 }
76
77 /*
78 ===============================================
79 Server functions
80 ===============================================
81 */
82
83 /* Read a byte from the client and write it back */
84 static void
server_read_cb(struct bufferevent * bev,void * ctx)85 server_read_cb(struct bufferevent *bev, void *ctx)
86 {
87 while (evbuffer_get_length(bufferevent_get_input(bev))) {
88 unsigned char tmp;
89 bufferevent_read(bev, &tmp, 1);
90 bufferevent_write(bev, &tmp, 1);
91 }
92 }
93
94 /* Wait for an EOF and then free the bufferevent */
95 static void
server_event_cb(struct bufferevent * bev,short events,void * ctx)96 server_event_cb(struct bufferevent *bev, short events, void *ctx)
97 {
98 if (events & BEV_EVENT_ERROR) {
99 my_perror("Error from bufferevent");
100 exit(1);
101 } else if (events & BEV_EVENT_EOF) {
102 bufferevent_free(bev);
103 if (num_requests == MAX_REQUESTS) {
104 event_base_loopbreak(bufferevent_get_base(bev));
105 }
106 }
107 }
108
109 /* Accept a client socket and set it up to for reading & writing */
110 static void
listener_accept_cb(struct evconnlistener * listener,evutil_socket_t sock,struct sockaddr * addr,int len,void * ptr)111 listener_accept_cb(struct evconnlistener *listener, evutil_socket_t sock,
112 struct sockaddr *addr, int len, void *ptr)
113 {
114 struct event_base *base = evconnlistener_get_base(listener);
115 struct bufferevent *bev = bufferevent_socket_new(base, sock,
116 BEV_OPT_CLOSE_ON_FREE);
117 bufferevent_setcb(bev, server_read_cb, NULL, server_event_cb, NULL);
118 bufferevent_enable(bev, EV_READ|EV_WRITE);
119 }
120
121 /* Start the server listening on a random port and start the first client. */
122 static void
start_loop(void)123 start_loop(void)
124 {
125 struct event_base *base;
126 struct evconnlistener *listener;
127 struct sockaddr_storage ss;
128 ev_socklen_t socklen = sizeof(ss);
129 evutil_socket_t fd;
130
131 base = event_base_new();
132 if (base == NULL) {
133 puts("Could not open event base!");
134 exit(1);
135 }
136
137 listener = evconnlistener_new_bind(base, listener_accept_cb, NULL,
138 LEV_OPT_CLOSE_ON_FREE|LEV_OPT_REUSEABLE,
139 -1, (struct sockaddr *)&saddr, sizeof(saddr));
140 if (listener == NULL) {
141 my_perror("Could not create listener!");
142 exit(1);
143 }
144 fd = evconnlistener_get_fd(listener);
145 if (fd < 0) {
146 puts("Couldn't get fd from listener");
147 exit(1);
148 }
149 if (getsockname(fd, (struct sockaddr *)&ss, &socklen) < 0) {
150 my_perror("getsockname()");
151 exit(1);
152 }
153 memcpy(&saddr, &ss, sizeof(saddr));
154 if (saddr.sin_family != AF_INET) {
155 puts("AF mismatch from getsockname().");
156 exit(1);
157 }
158
159 start_client(base);
160
161 event_base_dispatch(base);
162
163 evconnlistener_free(listener);
164 event_base_free(base);
165 }
166
167 /*
168 ===============================================
169 Client functions
170 ===============================================
171 */
172
173 /* Check that the server sends back the same byte that the client sent.
174 If MAX_REQUESTS have been reached, exit. Otherwise, start another client. */
175 static void
client_read_cb(struct bufferevent * bev,void * ctx)176 client_read_cb(struct bufferevent *bev, void *ctx)
177 {
178 unsigned char tmp;
179 struct event_base *base = bufferevent_get_base(bev);
180
181 bufferevent_read(bev, &tmp, 1);
182 if (tmp != 'A') {
183 puts("Incorrect data received!");
184 exit(2);
185 }
186 bufferevent_free(bev);
187
188 num_requests++;
189 if (++num_requests < MAX_REQUESTS) {
190 start_client(base);
191 }
192 }
193
194 /* Send a byte to the server. */
195 static void
client_event_cb(struct bufferevent * bev,short events,void * ctx)196 client_event_cb(struct bufferevent *bev, short events, void *ctx)
197 {
198 if (events & BEV_EVENT_CONNECTED) {
199 unsigned char tmp = 'A';
200 bufferevent_write(bev, &tmp, 1);
201 } else if (events & BEV_EVENT_ERROR) {
202 puts("Client socket got error!");
203 exit(2);
204 }
205
206 bufferevent_enable(bev, EV_READ);
207 }
208
209 /* Open a client socket to connect to localhost on sin */
210 static void
start_client(struct event_base * base)211 start_client(struct event_base *base)
212 {
213 struct bufferevent *bev = bufferevent_socket_new(base, -1,
214 BEV_OPT_CLOSE_ON_FREE);
215 bufferevent_setcb(bev, client_read_cb, NULL, client_event_cb, NULL);
216
217 if (bufferevent_socket_connect(bev, (struct sockaddr *)&saddr,
218 sizeof(saddr)) < 0) {
219 my_perror("Could not connect!");
220 bufferevent_free(bev);
221 exit(2);
222 }
223 }
224
225 int
main(int argc,char ** argv)226 main(int argc, char **argv)
227 {
228 #ifdef EVENT__HAVE_SETRLIMIT
229 /* Set the fd limit to a low value so that any fd leak is caught without
230 making many requests. */
231 struct rlimit rl;
232 rl.rlim_cur = rl.rlim_max = 20;
233 if (setrlimit(RLIMIT_NOFILE, &rl) == -1) {
234 my_perror("setrlimit");
235 exit(3);
236 }
237 #endif
238
239 #ifdef _WIN32
240 WSADATA WSAData;
241 WSAStartup(0x101, &WSAData);
242 #endif
243
244 /* Set up an address, used by both client & server. */
245 memset(&saddr, 0, sizeof(saddr));
246 saddr.sin_family = AF_INET;
247 saddr.sin_addr.s_addr = htonl(0x7f000001);
248 saddr.sin_port = 0; /* Tell the implementation to pick a port. */
249
250 start_loop();
251
252 return 0;
253 }
254
255 /* XXX why does this test cause so much latency sometimes (OSX 10.5)? */
256