diff options
| -rw-r--r-- | tools/regression/sockets/accept_fd_leak/Makefile | 11 | ||||
| -rw-r--r-- | tools/regression/sockets/accept_fd_leak/accept_fd_leak.c | 131 |
2 files changed, 142 insertions, 0 deletions
diff --git a/tools/regression/sockets/accept_fd_leak/Makefile b/tools/regression/sockets/accept_fd_leak/Makefile new file mode 100644 index 0000000..69ac015 --- /dev/null +++ b/tools/regression/sockets/accept_fd_leak/Makefile @@ -0,0 +1,11 @@ +# +# $FreeBSD$ +# + +PROG= accept_fd_leak +NOMAN= yes + +regress: + ./accept_fd_leak + +.include <bsd.prog.mk> diff --git a/tools/regression/sockets/accept_fd_leak/accept_fd_leak.c b/tools/regression/sockets/accept_fd_leak/accept_fd_leak.c new file mode 100644 index 0000000..6d81eb9 --- /dev/null +++ b/tools/regression/sockets/accept_fd_leak/accept_fd_leak.c @@ -0,0 +1,131 @@ +/*- + * Copyright (c) 2004 Robert N. M. Watson + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/types.h> +#include <sys/socket.h> + +#include <netinet/in.h> + +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#define LOOPS 500 + +/* + * This test is intended to detect a leak of a file descriptor in the process + * following a failed non-blocking accept. It measures an available fd + * baseline, then performs 1000 failing accepts, then checks to see what the + * next fd is. It relies on sequential fd allocation, and will test for it + * briefly before beginning (not 100% reliable, but a good start). + */ +int +main(int argc, char *argv[]) +{ + struct sockaddr_in sin; + socklen_t size; + int fd1, fd2, fd3, i, s; + + /* + * Check for sequential fd allocation, and give up early if not. + */ + fd1 = dup(STDIN_FILENO); + fd2 = dup(STDIN_FILENO); + if (fd2 != fd1 + 1) { + fprintf(stderr, "Non-sequential fd allocation!\n"); + exit(-1); + } + + s = socket(PF_INET, SOCK_STREAM, 0); + if (s == -1) { + perror("socket"); + exit(-1); + } + + bzero(&sin, sizeof(sin)); + sin.sin_len = sizeof(sin); + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK); + sin.sin_port = htons(8080); + + if (bind(s, (struct sockaddr *) &sin, sizeof(sin)) != 0) { + perror("bind"); + exit(-1); + } + + if (listen(s, -1) != 0) { + perror("listen"); + exit(-1); + } + + i = fcntl(s, F_GETFL); + if (i == -1) { + perror("F_GETFL"); + exit(-1); + } + i |= O_NONBLOCK; + if (fcntl(s, F_SETFL, i) != 0) { + perror("F_SETFL"); + exit(-1); + } + i = fcntl(s, F_GETFL); + if (i == -1) { + perror("F_GETFL"); + exit(-1); + } + if ((i & O_NONBLOCK) != O_NONBLOCK) { + fprintf(stderr, "Failed to set O_NONBLOCK (i=%d)\n", i); + exit(-1); + } + + for (i = 0; i < LOOPS; i++) { + if (accept(s, (struct sockaddr *)&sin, &size) != -1) { + fprintf(stderr, "accept succeeded!\n"); + exit(-1); + } + if (errno != EAGAIN) { + perror("accept"); + exit(-1); + } + } + + /* + * Allocate a file descriptor and make sure it's fd2+2. 2 because + * we allocate an fd for the socket. + */ + fd3 = dup(STDIN_FILENO); + if (fd3 != fd2 + 2) { + fprintf(stderr, "TEST FAILED (%d, %d, %d)\n", fd1, fd2, fd3); + exit(-1); + } + + return (0); +} |
