1 /*- 2 * Copyright (c) 2004 Robert N. M. Watson 3 * All rights reserved. 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include <sys/types.h> 30 #include <sys/socket.h> 31 #include <sys/wait.h> 32 33 #include <netinet/in.h> 34 35 #include <err.h> 36 #include <errno.h> 37 #include <fcntl.h> 38 #include <signal.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <unistd.h> 43 44 #define LOOPS 500 45 46 volatile int quit; 47 48 static void 49 child_died(int sig) 50 { 51 quit = 1; 52 } 53 54 /* 55 * This test is intended to detect a leak of a file descriptor in the process 56 * following a failed non-blocking accept. It measures an available fd 57 * baseline, then performs 1000 failing accepts, then checks to see what the 58 * next fd is. It relies on sequential fd allocation, and will test for it 59 * briefly before beginning (not 100% reliable, but a good start). 60 */ 61 int 62 main(int argc, char *argv[]) 63 { 64 struct sockaddr_in sin; 65 socklen_t size; 66 pid_t child; 67 int fd1, fd2, fd3, i, s; 68 int status; 69 70 printf("1..2\n"); 71 72 /* 73 * Check for sequential fd allocation, and give up early if not. 74 */ 75 fd1 = dup(STDIN_FILENO); 76 fd2 = dup(STDIN_FILENO); 77 if (fd2 != fd1 + 1) 78 errx(-1, "Non-sequential fd allocation\n"); 79 80 s = socket(PF_INET, SOCK_STREAM, 0); 81 if (s == -1) 82 errx(-1, "socket: %s", strerror(errno)); 83 84 bzero(&sin, sizeof(sin)); 85 sin.sin_len = sizeof(sin); 86 sin.sin_family = AF_INET; 87 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 88 sin.sin_port = htons(8080); 89 90 if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) != 0) 91 errx(-1, "bind: %s", strerror(errno)); 92 93 if (listen(s, -1) != 0) 94 errx(-1, "listen: %s", strerror(errno)); 95 96 i = fcntl(s, F_GETFL); 97 if (i == -1) 98 errx(-1, "ioctl(F_GETFL): %s", strerror(errno)); 99 i |= O_NONBLOCK; 100 if (fcntl(s, F_SETFL, i) != 0) 101 errx(-1, "ioctl(F_SETFL): %s", strerror(errno)); 102 i = fcntl(s, F_GETFL); 103 if (i == -1) 104 errx(-1, "ioctl(F_GETFL): %s", strerror(errno)); 105 if ((i & O_NONBLOCK) != O_NONBLOCK) 106 errx(-1, "Failed to set O_NONBLOCK (i=0x%x)\n", i); 107 108 for (i = 0; i < LOOPS; i++) { 109 size = sizeof(sin); 110 if (accept(s, (struct sockaddr *)&sin, &size) != -1) 111 errx(-1, "accept succeeded\n"); 112 if (errno != EAGAIN) 113 errx(-1, "accept: %s", strerror(errno)); 114 } 115 116 /* 117 * Allocate a file descriptor and make sure it's fd2+2. 2 because 118 * we allocate an fd for the socket. 119 */ 120 fd3 = dup(STDIN_FILENO); 121 if (fd3 != fd2 + 2) 122 printf("not ok 1 - (%d, %d, %d)\n", fd1, fd2, fd3); 123 else 124 printf("ok 1\n"); 125 126 /* 127 * Try failing accept's w/o non-blocking where the destination 128 * address pointer is invalid. 129 */ 130 close(fd3); 131 signal(SIGCHLD, child_died); 132 child = fork(); 133 if (child < 0) 134 errx(-1, "fork: %s", strerror(errno)); 135 136 /* 137 * Child process does 1000 connect's. 138 */ 139 if (child == 0) { 140 bzero(&sin, sizeof(sin)); 141 sin.sin_len = sizeof(sin); 142 sin.sin_family = AF_INET; 143 sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 144 sin.sin_port = htons(8080); 145 146 for (i = 0; i < 1000; i++) { 147 s = socket(PF_INET, SOCK_STREAM, 0); 148 if (s == -1) 149 errx(-1, "socket: %s", strerror(errno)); 150 if (connect(s, (struct sockaddr *)&sin, 151 sizeof(sin)) < 0) 152 errx(-1, "connect: %s", strerror(errno)); 153 close(s); 154 } 155 exit(0); 156 } 157 158 /* Reset back to a blocking socket. */ 159 i = fcntl(s, F_GETFL); 160 if (i == -1) 161 errx(-1, "ioctl(F_GETFL): %s", strerror(errno)); 162 i &= ~O_NONBLOCK; 163 if (fcntl(s, F_SETFL, i) != 0) 164 errx(-1, "ioctl(F_SETFL): %s", strerror(errno)); 165 i = fcntl(s, F_GETFL); 166 if (i == -1) 167 errx(-1, "ioctl(F_GETFL): %s", strerror(errno)); 168 if (i & O_NONBLOCK) 169 errx(-1, "Failed to clear O_NONBLOCK (i=0x%x)\n", i); 170 171 /* Do 1000 accept's with an invalid pointer. */ 172 for (i = 0; !quit && i < 1000; i++) { 173 size = sizeof(sin); 174 if (accept(s, (struct sockaddr *)(uintptr_t)(0x100), 175 &size) != -1) 176 errx(-1, "accept succeeded\n"); 177 if (errno != EFAULT) 178 errx(-1, "accept: %s", strerror(errno)); 179 } 180 181 if (waitpid(child, &status, 0) < 0) 182 errx(-1, "waitpid: %s", strerror(errno)); 183 if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) 184 warnx("child process died"); 185 186 /* 187 * Allocate a file descriptor and make sure it's fd2+2. 2 because 188 * we allocate an fd for the socket. 189 */ 190 fd3 = dup(STDIN_FILENO); 191 if (fd3 != fd2 + 2) 192 printf("not ok 2 - (%d, %d, %d)\n", fd1, fd2, fd3); 193 else 194 printf("ok 2\n"); 195 196 return (0); 197 } 198