/*-
* Copyright (c) 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 <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <err.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
/*
* This regression test is intended to verify whether or not SIGPIPE is
* properly generated in several simple test cases, as well as testing
* whether SO_NOSIGPIPE disables SIGPIPE, if available on the system.
* SIGPIPE is generated if a write or send is attempted on a socket that has
* been shutdown for write. This test runs several test cases with UNIX
* domain sockets and TCP sockets to confirm that either EPIPE or SIGPIPE is
* properly returned.
*
* For the purposes of testing TCP, an unused port number must be specified.
*/
static void
usage(void)
{
errx(-1, "usage: sigpipe tcpport");
}
/*
* Signal catcher. Set a global flag that can be tested by the caller.
*/
static int signaled;
static int
got_signal(void)
{
return (signaled);
}
static void
signal_handler(int signum __unused)
{
signaled = 1;
}
static void
signal_setup(const char *testname)
{
signaled = 0;
if (signal(SIGPIPE, signal_handler) == SIG_ERR)
err(-1, "%s: signal(SIGPIPE)", testname);
}
static void
test_send(const char *testname, int sock)
{
ssize_t len;
char ch;
ch = 0;
len = send(sock, &ch, sizeof(ch), 0);
if (len < 0) {
if (errno == EPIPE)
return;
err(-1, "%s: send", testname);
}
errx(-1, "%s: send: returned %zd", testname, len);
}
static void
test_write(const char *testname, int sock)
{
ssize_t len;
char ch;
ch = 0;
len = write(sock, &ch, sizeof(ch));
if (len < 0) {
if (errno == EPIPE)
return;
err(-1, "%s: write", testname);
}
errx(-1, "%s: write: returned %zd", testname, len);
}
static void
test_send_wantsignal(const char *testname, int sock1, int sock2)
{
if (shutdown(sock2, SHUT_WR) < 0)
err(-1, "%s: shutdown", testname);
signal_setup(testname);
test_send(testname, sock2);
if (!got_signal())
errx(-1, "%s: send: didn't receive SIGPIPE", testname);
close(sock1);
close(sock2);
}
#ifdef SO_NOSIGPIPE
static void
test_send_dontsignal(const char *testname, int sock1, int sock2)
{
int i;
i = 1;
if (setsockopt(sock2, SOL_SOCKET, SO_NOSIGPIPE, &i, sizeof(i)) < 0)
err(-1, "%s: setsockopt(SOL_SOCKET, SO_NOSIGPIPE)", testname);
if (shutdown(sock2, SHUT_WR) < 0)
err(-1, "%s: shutdown", testname);
signal_setup(testname);
test_send(testname, sock2);
if (got_signal())
errx(-1, "%s: send: got SIGPIPE", testname);
close(sock1);
close(sock2);
}
#endif
static void
test_write_wantsignal(const char *testname, int sock1, int sock2)
{
if (shutdown(sock2, SHUT_WR) < 0)
err(-1, "%s: shutdown", testname);
signal_setup(testname);
test_write(testname, sock2);
if (!got_signal())
errx(-1, "%s: write: didn't receive SIGPIPE", testname);
close(sock1);
close(sock2);
}
#ifdef SO_NOSIGPIPE
static void
test_write_dontsignal(const char *testname, int sock1, int sock2)
{
int i;
i = 1;
if (setsockopt(sock2, SOL_SOCKET, SO_NOSIGPIPE, &i, sizeof(i)) < 0)
err(-1, "%s: setsockopt(SOL_SOCKET, SO_NOSIGPIPE)", testname);
if (shutdown(sock2, SHUT_WR) < 0)
err(-1, "%s: shutdown", testname);
signal_setup(testname);
test_write(testname, sock2);
if (got_signal())
errx(-1, "%s: write: got SIGPIPE", testname);
close(sock1);
close(sock2);
}
#endif
static int listen_sock;
static void
tcp_setup(u_short port)
{
struct sockaddr_in sin;
listen_sock = socket(PF_INET, SOCK_STREAM, 0);
if (listen_sock < 0)
err(-1, "tcp_setup: listen");
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(port);
if (bind(listen_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
err(-1, "tcp_setup: bind");
if (listen(listen_sock, -1) < 0)
err(-1, "tcp_setup: listen");
}
static void
tcp_teardown(void)
{
close(listen_sock);
}
static void
tcp_pair(u_short port, int sock[2])
{
int accept_sock, connect_sock;
struct sockaddr_in sin;
socklen_t len;
connect_sock = socket(PF_INET, SOCK_STREAM, 0);
if (connect_sock < 0)
err(-1, "tcp_pair: socket");
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(port);
if (connect(connect_sock, (struct sockaddr *)&sin, sizeof(sin)) < 0)
err(-1, "tcp_pair: connect");
sleep(1); /* Time for TCP to settle. */
len = sizeof(sin);
accept_sock = accept(listen_sock, (struct sockaddr *)&sin, &len);
if (accept_sock < 0)
err(-1, "tcp_pair: accept");
sleep(1); /* Time for TCP to settle. */
sock[0] = accept_sock;
sock[1] = connect_sock;
}
int
main(int argc, char *argv[])
{
char *dummy;
int sock[2];
long port;
if (argc != 2)
usage();
port = strtol(argv[1], &dummy, 10);
if (port < 0 || port > 65535 || *dummy != '\0')
usage();
#ifndef SO_NOSIGPIPE
warnx("sigpipe: SO_NOSIGPIPE not defined, skipping some tests");
#endif
/*
* UNIX domain socketpair().
*/
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
test_send_wantsignal("test_send_wantsignal(PF_LOCAL)", sock[0],
sock[1]);
#ifdef SO_NOSIGPIPE
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
test_send_dontsignal("test_send_dontsignal(PF_LOCAL)", sock[0],
sock[1]);
#endif
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
test_write_wantsignal("test_write_wantsignal(PF_LOCAL)", sock[0],
sock[1]);
#ifdef SO_NOSIGPIPE
if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sock) < 0)
err(-1, "socketpair(PF_LOCAL, SOCK_STREAM)");
test_write_dontsignal("test_write_dontsignal(PF_LOCAL)", sock[0],
sock[1]);
#endif
/*
* TCP.
*/
tcp_setup(port);
tcp_pair(port, sock);
test_send_wantsignal("test_send_wantsignal(PF_INET)", sock[0],
sock[1]);
#ifdef SO_NOSIGPIPE
tcp_pair(port, sock);
test_send_dontsignal("test_send_dontsignal(PF_INET)", sock[0],
sock[1]);
#endif
tcp_pair(port, sock);
test_write_wantsignal("test_write_wantsignal(PF_INET)", sock[0],
sock[1]);
#ifdef SO_NOSIGPIPE
tcp_pair(port, sock);
test_write_dontsignal("test_write_dontsignal(PF_INET)", sock[0],
sock[1]);
#endif
tcp_teardown();
fprintf(stderr, "PASS\n");
return (0);
}
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