Add sigpipe, a simple UNIX domain socket and TCP regression test that is
intended to verify that SIGPIPE is delivered to a process writing or sending on a socket that has been shut down for write. If available, SO_NOSIGPIPE is also tested. This regression test is currently passed by RELENG_4, but not by HEAD or RELENG_5, due to a bug in the write() code for sockets. SO_NOSIGPIPE is not present in RELENG_4, however, so is not tested there. Reported by: Mikko Tyolajarvi <mbsd at pacbell dot net> PR: 78478
This commit is contained in:
rwatson
parent
7014c90c7d
commit
832b048264
9
tools/regression/sockets/sigpipe/Makefile
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9
tools/regression/sockets/sigpipe/Makefile
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#
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# $FreeBSD$
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#
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PROG= sigpipe
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NO_MAN=
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WARNS?= 2
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.include <bsd.prog.mk>
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318
tools/regression/sockets/sigpipe/sigpipe.c
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318
tools/regression/sockets/sigpipe/sigpipe.c
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/*-
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* Copyright (c) 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 <err.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/*
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* This regression test is intended to verify whether or not SIGPIPE is
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* properly generated in several simple test cases, as well as testing
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* whether SO_NOSIGPIPE disables SIGPIPE, if available on the system.
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* SIGPIPE is generated if a write or send is attempted on a socket that has
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* been shutdown for write. This test runs several test cases with UNIX
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* domain sockets and TCP sockets to confirm that either EPIPE or SIGPIPE is
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* properly returned.
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*
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* For the purposes of testing TCP, an unused port number must be specified.
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*/
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static void
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usage(void)
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{
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errx(-1, "usage: sigpipe tcpport");
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}
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/*
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* Signal catcher. Set a global flag that can be tested by the caller.
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*/
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static int signaled;
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static int
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got_signal(void)
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{
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return (signaled);
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}
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static void
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signal_handler(int signum)
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{
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signaled = 1;
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}
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static void
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signal_setup(const char *testname)
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{
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signaled = 0;
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if (signal(SIGPIPE, signal_handler) == SIG_ERR)
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err(-1, "%s: signal(SIGPIPE)", testname);
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}
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static void
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test_send(const char *testname, int sock)
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{
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ssize_t len;
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char ch;
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ch = 0;
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len = send(sock, &ch, sizeof(ch), 0);
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if (len < 0) {
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if (errno == EPIPE)
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return;
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err(-1, "%s: send", testname);
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}
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errx(-1, "%s: send: returned %d", testname, len);
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}
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static void
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test_write(const char *testname, int sock)
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{
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ssize_t len;
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char ch;
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ch = 0;
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len = write(sock, &ch, sizeof(ch));
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if (len < 0) {
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if (errno == EPIPE)
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return;
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err(-1, "%s: write", testname);
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}
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errx(-1, "%s: write: returned %d", testname, len);
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}
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static void
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test_send_wantsignal(const char *testname, int sock1, int sock2)
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{
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shutdown(sock2, SHUT_WR);
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signal_setup(testname);
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test_send(testname, sock2);
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if (!got_signal())
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errx(-1, "%s: send: didn't receive SIGPIPE", testname);
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close(sock1);
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close(sock2);
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}
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#ifdef SO_NOSIGPIPE
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static void
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test_send_dontsignal(const char *testname, int sock1, int sock2)
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{
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int i;
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i = 1;
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if (setsockopt(sock2, SOL_SOCKET, SO_NOSIGPIPE, &i, sizeof(i)) < 0)
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err(-1, "%s: setsockopt(SOL_SOCKET, SO_NOSIGPIPE)", testname);
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shutdown(sock2, SHUT_WR);
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signal_setup(testname);
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test_send(testname, sock2);
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if (got_signal())
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errx(-1, "%s: send: got SIGPIPE", testname);
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close(sock1);
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close(sock2);
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}
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#endif
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static void
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test_write_wantsignal(const char *testname, int sock1, int sock2)
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{
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shutdown(sock2, SHUT_WR);
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signal_setup(testname);
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test_write(testname, sock2);
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if (!got_signal())
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errx(-1, "%s: write: didn't receive SIGPIPE", testname);
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close(sock1);
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close(sock2);
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}
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#ifdef SO_NOSIGPIPE
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static void
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test_write_dontsignal(const char *testname, int sock1, int sock2)
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{
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int i;
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i = 1;
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if (setsockopt(sock2, SOL_SOCKET, SO_NOSIGPIPE, &i, sizeof(i)) < 0)
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err(-1, "%s: setsockopt(SOL_SOCKET, SO_NOSIGPIPE)", testname);
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shutdown(sock2, SHUT_WR);
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signal_setup(testname);
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test_write(testname, sock2);
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if (got_signal())
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errx(-1, "%s: write: got SIGPIPE", testname);
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close(sock1);
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close(sock2);
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}
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#endif
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static int listen_sock;
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static void
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tcp_setup(u_short port)
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{
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struct sockaddr_in sin;
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listen_sock = socket(PF_INET, SOCK_STREAM, 0);
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if (listen_sock < 0)
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err(-1, "tcp_setup: listen");
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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 = htons(port);
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if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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err(-1, "tcp_setup: bind");
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if (listen(listen_sock, -1) < 0)
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err(-1, "tcp_setup: listen");
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}
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static void
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tcp_teardown(void)
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{
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close(listen_sock);
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}
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static void
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tcp_pair(u_short port, int sock[2])
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{
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int accept_sock, connect_sock;
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struct sockaddr_in sin;
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socklen_t len;
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connect_sock = socket(PF_INET, SOCK_STREAM, 0);
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if (connect_sock < 0)
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err(-1, "tcp_pair: socket");
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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 = htons(port);
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if (connect(connect_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
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err(-1, "tcp_pair: connect");
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sleep(1); /* Time for TCP to settle. */
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len = sizeof(sin);
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accept_sock = accept(listen_sock, (struct sockaddr *)&sin, &len);
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if (accept_sock < 0)
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err(-1, "tcp_pair: accept");
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sleep(1); /* Time for TCP to settle. */
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sock[0] = accept_sock;
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sock[1] = connect_sock;
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}
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int
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main(int argc, char *argv[])
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{
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char *dummy;
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int sock[2];
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long port;
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if (argc != 2)
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usage();
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port = strtol(argv[1], &dummy, 10);
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if (port < 0 || port > 65535 || *dummy != '\0')
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usage();
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#ifndef SO_NOSIGPIPE
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warnx("sigpipe: SO_NOSIGPIPE not defined, skipping some tests");
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#endif
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/*
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* UNIX domain socketpair().
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*/
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if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
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err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
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test_send_wantsignal("test_send_wantsignal(PF_LOCAL)", sock[0],
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sock[1]);
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#ifdef SO_NOSIGPIPE
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if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
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err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
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test_send_dontsignal("test_send_dontsignal(PF_LOCAL)", sock[0],
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sock[1]);
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#endif
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if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
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err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
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test_write_wantsignal("test_write_wantsignal(PF_LOCAL)", sock[0],
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sock[1]);
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#ifdef SO_NOSIGPIPE
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if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
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err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
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test_write_dontsignal("test_write_dontsignal(PF_LOCAL)", sock[0],
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sock[1]);
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#endif
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/*
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* TCP.
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*/
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tcp_setup(port);
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tcp_pair(port, sock);
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test_send_wantsignal("test_send_wantsignal(PF_INET)", sock[0],
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sock[1]);
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#ifdef SO_NOSIGPIPE
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tcp_pair(port, sock);
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test_send_dontsignal("test_send_dontsignal(PF_INET)", sock[0],
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sock[1]);
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#endif
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tcp_pair(port, sock);
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test_write_wantsignal("test_write_wantsignal(PF_INET)", sock[0],
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sock[1]);
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#ifdef SO_NOSIGPIPE
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tcp_pair(port, sock);
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test_write_dontsignal("test_write_dontsignal(PF_INET)", sock[0],
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sock[1]);
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#endif
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tcp_teardown();
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fprintf(stderr, "PASS\n");
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return (0);
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}
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