1 /*- 2 * Copyright (C) 2005 The FreeBSD Project. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 #include <sys/types.h> 29 #include <sys/socket.h> 30 31 #include <netinet/in.h> 32 #include <arpa/inet.h> 33 34 #include <err.h> 35 #include <errno.h> 36 #include <stdio.h> 37 #include <string.h> 38 #include <unistd.h> 39 40 int 41 main(void) 42 { 43 struct sockaddr_in sock; 44 socklen_t len; 45 int listen_sock, connect_sock; 46 u_short port; 47 48 listen_sock = -1; 49 50 /* Shutdown(2) on an invalid file descriptor has to return EBADF. */ 51 if ((shutdown(listen_sock, SHUT_RDWR) != -1) && (errno != EBADF)) 52 errx(-1, "shutdown() for invalid file descriptor does not " 53 "return EBADF"); 54 55 listen_sock = socket(PF_INET, SOCK_STREAM, 0); 56 if (listen_sock == -1) 57 errx(-1, 58 "socket(PF_INET, SOCK_STREAM, 0) for listen socket: %s", 59 strerror(errno)); 60 61 bzero(&sock, sizeof(sock)); 62 sock.sin_len = sizeof(sock); 63 sock.sin_family = AF_INET; 64 sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 65 sock.sin_port = 0; 66 67 if (bind(listen_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0) 68 errx(-1, "bind(%s, %d) for listen socket: %s", 69 inet_ntoa(sock.sin_addr), sock.sin_port, strerror(errno)); 70 71 len = sizeof(sock); 72 if (getsockname(listen_sock, (struct sockaddr *)&sock, &len) < 0) 73 errx(-1, "getsockname() for listen socket: %s", 74 strerror(errno)); 75 port = sock.sin_port; 76 77 if (listen(listen_sock, -1) < 0) 78 errx(-1, "listen() for listen socket: %s", strerror(errno)); 79 80 connect_sock = socket(PF_INET, SOCK_STREAM, 0); 81 if (connect_sock == -1) 82 errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect " 83 "socket: %s", strerror(errno)); 84 85 bzero(&sock, sizeof(sock)); 86 sock.sin_len = sizeof(sock); 87 sock.sin_family = AF_INET; 88 sock.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 89 sock.sin_port = port; 90 91 if (connect(connect_sock, (struct sockaddr *)&sock, sizeof(sock)) < 0) 92 errx(-1, "connect() for connect socket: %s", strerror(errno)); 93 /* Try to pass an invalid flags. */ 94 if ((shutdown(connect_sock, SHUT_RD - 1) != -1) && (errno != EINVAL)) 95 errx(-1, "shutdown(SHUT_RD - 1) does not return EINVAL"); 96 if ((shutdown(connect_sock, SHUT_RDWR + 1) != -1) && (errno != EINVAL)) 97 errx(-1, "shutdown(SHUT_RDWR + 1) does not return EINVAL"); 98 99 if (shutdown(connect_sock, SHUT_RD) < 0) 100 errx(-1, "shutdown(SHUT_RD) for connect socket: %s", 101 strerror(errno)); 102 if (shutdown(connect_sock, SHUT_WR) < 0) 103 errx(-1, "shutdown(SHUT_WR) for connect socket: %s", 104 strerror(errno)); 105 106 close(connect_sock); 107 close(listen_sock); 108 109 return (0); 110 } 111