1 /*
2 * Copyright (c) 2002-2007 Niels Provos <provos@citi.umich.edu>
3 * Copyright (c) 2007-2013 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 #include "event2/event-config.h"
29
30 #ifdef _WIN32
31 #include <winsock2.h>
32 #else
33 #include <unistd.h>
34 #endif
35 #include <sys/types.h>
36 #include <sys/stat.h>
37 #ifdef EVENT__HAVE_SYS_TIME_H
38 #include <sys/time.h>
39 #endif
40 #ifdef EVENT__HAVE_SYS_SOCKET_H
41 #include <sys/socket.h>
42 #endif
43 #include <fcntl.h>
44 #include <stdlib.h>
45 #include <stdio.h>
46 #include <string.h>
47 #include <errno.h>
48
49 #include <event.h>
50 #include <evutil.h>
51
52 struct timeval timeout = {3, 0};
53
54 static void
closed_cb(evutil_socket_t fd,short event,void * arg)55 closed_cb(evutil_socket_t fd, short event, void *arg)
56 {
57 if (EV_TIMEOUT & event) {
58 printf("%s: Timeout!\n", __func__);
59 exit(1);
60 }
61
62 if (EV_CLOSED & event) {
63 printf("%s: detected socket close with success\n", __func__);
64 return;
65 }
66
67 printf("%s: unable to detect socket close\n", __func__);
68 exit(1);
69 }
70
71 int
main(int argc,char ** argv)72 main(int argc, char **argv)
73 {
74 struct event_base *base;
75 struct event_config *cfg;
76 struct event *ev;
77 const char *test = "test string";
78 evutil_socket_t pair[2];
79
80 /* Initialize the library and check if the backend
81 supports EV_FEATURE_EARLY_CLOSE
82 */
83 cfg = event_config_new();
84 event_config_require_features(cfg, EV_FEATURE_EARLY_CLOSE);
85 base = event_base_new_with_config(cfg);
86 event_config_free(cfg);
87 if (!base) {
88 /* Backend doesn't support EV_FEATURE_EARLY_CLOSE */
89 return 0;
90 }
91
92 /* Create a pair of sockets */
93 if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1)
94 return (1);
95
96 /* Send some data on socket 0 and immediately close it */
97 if (send(pair[0], test, (int)strlen(test)+1, 0) < 0)
98 return (1);
99 shutdown(pair[0], EVUTIL_SHUT_WR);
100
101 /* Dispatch */
102 ev = event_new(base, pair[1], EV_CLOSED | EV_TIMEOUT, closed_cb, event_self_cbarg());
103 event_add(ev, &timeout);
104 event_base_dispatch(base);
105
106 /* Finalize library */
107 event_free(ev);
108 event_base_free(base);
109 return 0;
110 }
111
112