1 /* 2 * Copyright (c) 2002-2007 Niels Provos <provos (at) 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 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 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_base_free(base); 108 return 0; 109 } 110 111
