accept_fd_leak.c revision 134238
1132295Srwatson/*- 2132295Srwatson * Copyright (c) 2004 Robert N. M. Watson 3132295Srwatson * All rights reserved. 4132295Srwatson * 5132295Srwatson * Redistribution and use in source and binary forms, with or without 6132295Srwatson * modification, are permitted provided that the following conditions 7132295Srwatson * are met: 8132295Srwatson * 1. Redistributions of source code must retain the above copyright 9132295Srwatson * notice, this list of conditions and the following disclaimer. 10132295Srwatson * 2. Redistributions in binary form must reproduce the above copyright 11132295Srwatson * notice, this list of conditions and the following disclaimer in the 12132295Srwatson * documentation and/or other materials provided with the distribution. 13132295Srwatson * 14132295Srwatson * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15132295Srwatson * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16132295Srwatson * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17132295Srwatson * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18132295Srwatson * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19132295Srwatson * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20132295Srwatson * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21132295Srwatson * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22132295Srwatson * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23132295Srwatson * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24132295Srwatson * SUCH DAMAGE. 25132295Srwatson * 26132295Srwatson * $FreeBSD: head/tools/regression/sockets/accept_fd_leak/accept_fd_leak.c 134238 2004-08-24 04:59:26Z rwatson $ 27132295Srwatson */ 28132295Srwatson 29132295Srwatson#include <sys/types.h> 30132295Srwatson#include <sys/socket.h> 31132295Srwatson 32132295Srwatson#include <netinet/in.h> 33132295Srwatson 34132295Srwatson#include <errno.h> 35132295Srwatson#include <fcntl.h> 36132295Srwatson#include <stdio.h> 37132295Srwatson#include <stdlib.h> 38132295Srwatson#include <string.h> 39132295Srwatson#include <unistd.h> 40132295Srwatson 41132295Srwatson#define LOOPS 500 42132295Srwatson 43132295Srwatson/* 44132295Srwatson * This test is intended to detect a leak of a file descriptor in the process 45132295Srwatson * following a failed non-blocking accept. It measures an available fd 46132295Srwatson * baseline, then performs 1000 failing accepts, then checks to see what the 47132295Srwatson * next fd is. It relies on sequential fd allocation, and will test for it 48132295Srwatson * briefly before beginning (not 100% reliable, but a good start). 49132295Srwatson */ 50132295Srwatsonint 51132295Srwatsonmain(int argc, char *argv[]) 52132295Srwatson{ 53132295Srwatson struct sockaddr_in sin; 54132295Srwatson socklen_t size; 55132295Srwatson int fd1, fd2, fd3, i, s; 56132295Srwatson 57132295Srwatson /* 58132295Srwatson * Check for sequential fd allocation, and give up early if not. 59132295Srwatson */ 60132295Srwatson fd1 = dup(STDIN_FILENO); 61132295Srwatson fd2 = dup(STDIN_FILENO); 62132295Srwatson if (fd2 != fd1 + 1) { 63132295Srwatson fprintf(stderr, "Non-sequential fd allocation!\n"); 64132295Srwatson exit(-1); 65132295Srwatson } 66132295Srwatson 67132295Srwatson s = socket(PF_INET, SOCK_STREAM, 0); 68132295Srwatson if (s == -1) { 69132295Srwatson perror("socket"); 70132295Srwatson exit(-1); 71132295Srwatson } 72132295Srwatson 73132295Srwatson bzero(&sin, sizeof(sin)); 74132295Srwatson sin.sin_len = sizeof(sin); 75132295Srwatson sin.sin_family = AF_INET; 76132295Srwatson sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); 77132295Srwatson sin.sin_port = htons(8080); 78132295Srwatson 79132295Srwatson if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) != 0) { 80132295Srwatson perror("bind"); 81132295Srwatson exit(-1); 82132295Srwatson } 83132295Srwatson 84132295Srwatson if (listen(s, -1) != 0) { 85132295Srwatson perror("listen"); 86132295Srwatson exit(-1); 87132295Srwatson } 88132295Srwatson 89132295Srwatson i = fcntl(s, F_GETFL); 90132295Srwatson if (i == -1) { 91132295Srwatson perror("F_GETFL"); 92132295Srwatson exit(-1); 93132295Srwatson } 94132295Srwatson i |= O_NONBLOCK; 95132295Srwatson if (fcntl(s, F_SETFL, i) != 0) { 96132295Srwatson perror("F_SETFL"); 97132295Srwatson exit(-1); 98132295Srwatson } 99132295Srwatson i = fcntl(s, F_GETFL); 100132295Srwatson if (i == -1) { 101132295Srwatson perror("F_GETFL"); 102132295Srwatson exit(-1); 103132295Srwatson } 104132295Srwatson if ((i & O_NONBLOCK) != O_NONBLOCK) { 105132295Srwatson fprintf(stderr, "Failed to set O_NONBLOCK (i=%d)\n", i); 106132295Srwatson exit(-1); 107132295Srwatson } 108132295Srwatson 109132295Srwatson for (i = 0; i < LOOPS; i++) { 110134238Srwatson size = sizeof(sin); 111132295Srwatson if (accept(s, (struct sockaddr *)&sin, &size) != -1) { 112132295Srwatson fprintf(stderr, "accept succeeded!\n"); 113132295Srwatson exit(-1); 114132295Srwatson } 115132295Srwatson if (errno != EAGAIN) { 116132295Srwatson perror("accept"); 117132295Srwatson exit(-1); 118132295Srwatson } 119132295Srwatson } 120132295Srwatson 121132295Srwatson /* 122132295Srwatson * Allocate a file descriptor and make sure it's fd2+2. 2 because 123132295Srwatson * we allocate an fd for the socket. 124132295Srwatson */ 125132295Srwatson fd3 = dup(STDIN_FILENO); 126132295Srwatson if (fd3 != fd2 + 2) { 127132295Srwatson fprintf(stderr, "TEST FAILED (%d, %d, %d)\n", fd1, fd2, fd3); 128132295Srwatson exit(-1); 129132295Srwatson } 130132295Srwatson 131132295Srwatson return (0); 132132295Srwatson} 133