/*- * Copyright (c) 2004-2005 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. */ #include #include #include #include #include #include #include #include #include #include /* * The listenclose regression test is designed to catch kernel bugs that may * trigger as a result of performing a close on a listen() socket with as-yet * unaccepted connections in its queues. This results in the connections * being aborted, which is a not-often-followed code path. To do this, we * create a local TCP socket, build a non-blocking connection to it, and then * close the accept socket. The connection must be non-blocking or the * program will block and as such connect() will not return as accept() is * never called. */ int main(void) { int listen_sock, connect_sock; struct sockaddr_in sin; socklen_t len; u_short port; int arg; listen_sock = socket(PF_INET, SOCK_STREAM, 0); if (listen_sock == -1) errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for listen socket: %s", strerror(errno)); 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 = 0; if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) errx(-1, "bind(%s, %d) for listen socket: %s", inet_ntoa(sin.sin_addr), 0, strerror(errno)); len = sizeof(sin); if (getsockname(listen_sock, (struct sockaddr *)&sin, &len) < 0) errx(-1, "getsockname() for listen socket: %s", strerror(errno)); port = sin.sin_port; if (listen(listen_sock, -1) < 0) errx(-1, "listen() for listen socket: %s", strerror(errno)); connect_sock = socket(PF_INET, SOCK_STREAM, 0); if (connect_sock == -1) errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect " "socket: %s", strerror(errno)); arg = O_NONBLOCK; if (fcntl(connect_sock, F_SETFL, &arg) < 0) errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect socket" ": %s", strerror(errno)); 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 = port; if (connect(connect_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0) errx(-1, "connect() for connect socket: %s", strerror(errno)); close(connect_sock); close(listen_sock); return (0); }