1 /*- 2 * Copyright (c) 2017 Hartmut Brandt <harti@FreeBSD.org> 3 * Copyright (c) 2017 Gleb Smirnoff <glebius@FreeBSD.org> 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * $FreeBSD$ 28 */ 29 30 #include <sys/types.h> 31 #include <sys/socket.h> 32 #include <sys/event.h> 33 #include <sys/filio.h> 34 #include <sys/ioctl.h> 35 #include <netinet/in.h> 36 #include <err.h> 37 #include <stdio.h> 38 #include <string.h> 39 #include <unistd.h> 40 41 /* 42 * This regression test is against a scenario when a socket is first added 43 * to a kqueue, and only then is put into listening state. 44 * This weird scenario was made a valid one in r313043, and shouldn't be 45 * broken later. 46 */ 47 48 int 49 main() 50 { 51 struct sockaddr_in addr; 52 struct kevent ev[2]; 53 socklen_t socklen; 54 int kq, sock, opt, pid, nev, fd; 55 56 if ((kq = kqueue()) == -1) 57 err(1, "kqueue"); 58 59 if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == -1) 60 err(1, "socket"); 61 62 EV_SET(&ev[0], sock, EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, NULL); 63 EV_SET(&ev[1], sock, EVFILT_WRITE, EV_ADD | EV_CLEAR, 0, 0, NULL); 64 65 opt = 1; 66 if (setsockopt(sock, SOL_SOCKET, SO_NOSIGPIPE, &opt, sizeof(opt)) == -1) 67 err(1, "setsockopt"); 68 69 if (kevent(kq, ev, 2, NULL, 0, NULL) == -1) 70 err(1, "kevent"); 71 72 if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt)) == -1) 73 err(1, "setsockopt"); 74 75 memset(&addr, 0, sizeof(addr)); 76 addr.sin_family = AF_INET; 77 addr.sin_port = htons(10000); 78 79 if (bind(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) 80 err(1, "bind"); 81 if (listen(sock, 0x80) == -1) 82 err(1, "listen"); 83 84 if (ioctl(sock, FIONBIO, &opt) == -1) 85 err(1, "ioctl(FIONBIO)"); 86 87 if (kevent(kq, ev, 2, NULL, 0, NULL) == -1) 88 err(1, "kevent"); 89 90 pid = fork(); 91 if (pid == -1) 92 err(1, "fork"); 93 if (pid == 0) { 94 if (close(sock) == -1) 95 err(1, "close"); 96 if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == -1) 97 err(1, "socket"); 98 if (connect(sock, (struct sockaddr *)&addr, sizeof(addr)) == -1) 99 err(1, "connect"); 100 } else { 101 nev = kevent(kq, NULL, 0, ev, 2, NULL); 102 if (nev < 1) 103 err(1, "kevent"); 104 for (int i = 0; i < nev; ++i) { 105 if (ev[i].ident == (uintptr_t )sock) { 106 fd = accept(ev[i].ident, 107 (struct sockaddr *)&addr, &socklen); 108 if (fd == -1) 109 err(1, "accept"); 110 printf("OK\n"); 111 } 112 } 113 } 114 } 115