112 lines
3.6 KiB
C
112 lines
3.6 KiB
C
/*-
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* Copyright (c) 2004-2005 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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/*
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* The listenclose regression test is designed to catch kernel bugs that may
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* trigger as a result of performing a close on a listen() socket with as-yet
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* unaccepted connections in its queues. This results in the connections
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* being aborted, which is a not-often-followed code path. To do this, we
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* create a local TCP socket, build a non-blocking connection to it, and then
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* close the accept socket. The connection must be non-blocking or the
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* program will block and as such connect() will not return as accept() is
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* never called.
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*/
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int
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main(void)
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{
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int listen_sock, connect_sock;
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struct sockaddr_in sin;
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socklen_t len;
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u_short port;
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int arg;
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listen_sock = socket(PF_INET, SOCK_STREAM, 0);
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if (listen_sock == -1)
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errx(-1,
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"socket(PF_INET, SOCK_STREAM, 0) for listen socket: %s",
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strerror(errno));
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bzero(&sin, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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sin.sin_port = 0;
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if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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errx(-1, "bind(%s, %d) for listen socket: %s",
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inet_ntoa(sin.sin_addr), 0, strerror(errno));
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len = sizeof(sin);
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if (getsockname(listen_sock, (struct sockaddr *)&sin, &len) < 0)
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errx(-1, "getsockname() for listen socket: %s",
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strerror(errno));
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port = sin.sin_port;
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if (listen(listen_sock, -1) < 0)
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errx(-1, "listen() for listen socket: %s", strerror(errno));
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connect_sock = socket(PF_INET, SOCK_STREAM, 0);
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if (connect_sock == -1)
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errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect "
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"socket: %s", strerror(errno));
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arg = O_NONBLOCK;
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if (fcntl(connect_sock, F_SETFL, &arg) < 0)
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errx(-1, "socket(PF_INET, SOCK_STREAM, 0) for connect socket"
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": %s", strerror(errno));
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bzero(&sin, sizeof(sin));
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sin.sin_len = sizeof(sin);
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sin.sin_family = AF_INET;
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sin.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
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sin.sin_port = port;
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if (connect(connect_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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errx(-1, "connect() for connect socket: %s", strerror(errno));
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close(connect_sock);
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close(listen_sock);
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return (0);
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}
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