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 "event2/event-config.h" 28 29#ifdef _WIN32 30#include <winsock2.h> 31#else 32#include <unistd.h> 33#endif 34#include <sys/types.h> 35#include <sys/stat.h> 36#ifdef EVENT__HAVE_SYS_TIME_H 37#include <sys/time.h> 38#endif 39#ifdef EVENT__HAVE_SYS_SOCKET_H 40#include <sys/socket.h> 41#endif 42#include <fcntl.h> 43#include <stdlib.h> 44#include <stdio.h> 45#include <string.h> 46#include <errno.h> 47 48#include <event.h> 49#include <evutil.h> 50 51#ifdef EVENT____func__ 52#define __func__ EVENT____func__ 53#endif 54 55struct timeval timeout = {3, 0}; 56 57static void 58closed_cb(evutil_socket_t fd, short event, void *arg) 59{ 60 if (EV_TIMEOUT & event) { 61 printf("%s: Timeout!\n", __func__); 62 exit(1); 63 } 64 65 if (EV_CLOSED & event) { 66 printf("%s: detected socket close with success\n", __func__); 67 return; 68 } 69 70 printf("%s: unable to detect socket close\n", __func__); 71 exit(1); 72} 73 74#ifndef SHUT_WR 75#define SHUT_WR 1 76#endif 77 78int 79main(int argc, char **argv) 80{ 81 struct event_base *base; 82 struct event_config *cfg; 83 struct event *ev; 84 const char *test = "test string"; 85 evutil_socket_t pair[2]; 86 87 /* Initialize the library and check if the backend 88 supports EV_FEATURE_EARLY_CLOSE 89 */ 90 cfg = event_config_new(); 91 event_config_require_features(cfg, EV_FEATURE_EARLY_CLOSE); 92 base = event_base_new_with_config(cfg); 93 event_config_free(cfg); 94 if (!base) { 95 /* Backend doesn't support EV_FEATURE_EARLY_CLOSE */ 96 return 0; 97 } 98 99 /* Create a pair of sockets */ 100 if (evutil_socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == -1) 101 return (1); 102 103 /* Send some data on socket 0 and immediately close it */ 104 if (send(pair[0], test, (int)strlen(test)+1, 0) < 0) 105 return (1); 106 shutdown(pair[0], SHUT_WR); 107 108 /* Dispatch */ 109 ev = event_new(base, pair[1], EV_CLOSED | EV_TIMEOUT, closed_cb, event_self_cbarg()); 110 event_add(ev, &timeout); 111 event_base_dispatch(base); 112 113 /* Finalize library */ 114 event_base_free(base); 115 return 0; 116} 117 118