/*-
* Copyright (c) 2006 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.
*/
/*
* Attempts to exercise UNIX domain socket races relating to the non-atomic
* connect-and-send properties of sendto(). As the result of such a race is
* a kernel panic, this test simply completes or doesn't.
*
* XXX: Despite implementing support for sendto() on stream sockets with
* implied connect, the appropriate flag isn't set in the FreeBSD kernel so
* it does not work. For now, don't call the stream test.
*/
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <err.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#define ITERATIONS 1000000
static char socket_path[] = "tmp.XXXXXX";
static void
stream_server(int listenfd)
{
int acceptfd;
while (1) {
acceptfd = accept(listenfd, NULL, NULL);
if (acceptfd < 0) {
warn("stream_server: accept");
continue;
}
sleep(1);
close(acceptfd);
}
}
static void
stream_client(void)
{
struct sockaddr_un sun;
ssize_t len;
char c = 0;
int fd, i;
bzero(&sun, sizeof(sun));
sun.sun_len = sizeof(sun);
sun.sun_family = AF_UNIX;
strcpy(sun.sun_path, socket_path);
for (i = 0; i < ITERATIONS; i++) {
fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
warn("stream_client: socket");
return;
}
len = sendto(fd, &c, sizeof(c), 0, (struct sockaddr *)&sun,
sizeof(sun));
if (len < 0)
warn("stream_client: sendto");
close(fd);
}
}
static void
stream_test(void)
{
struct sockaddr_un sun;
pid_t childpid;
int listenfd;
listenfd = socket(PF_UNIX, SOCK_STREAM, 0);
if (listenfd < 0)
err(-1, "stream_test: socket");
bzero(&sun, sizeof(sun));
sun.sun_len = sizeof(sun);
sun.sun_family = AF_UNIX;
strcpy(sun.sun_path, socket_path);
if (bind(listenfd, (struct sockaddr *)&sun, sizeof(sun)) < 0)
err(-1, "stream_test: bind");
if (listen(listenfd, -1) < 0)
err(-1, "stream_test: listen");
childpid = fork();
if (childpid < 0)
err(-1, "stream_test: fork");
if (childpid != 0) {
sleep(1);
stream_client();
kill(childpid, SIGTERM);
sleep(1);
} else
stream_server(listenfd);
(void)unlink(socket_path);
}
static void
datagram_server(int serverfd)
{
ssize_t len;
char c;
while (1) {
len = recv(serverfd, &c, sizeof(c), 0);
if (len < 0)
warn("datagram_server: recv");
}
}
static void
datagram_client(void)
{
struct sockaddr_un sun;
ssize_t len;
char c = 0;
int fd, i;
bzero(&sun, sizeof(sun));
sun.sun_len = sizeof(sun);
sun.sun_family = AF_UNIX;
strcpy(sun.sun_path, socket_path);
for (i = 0; i < ITERATIONS; i++) {
fd = socket(PF_UNIX, SOCK_DGRAM, 0);
if (fd < 0) {
warn("datagram_client: socket");
return;
}
len = sendto(fd, &c, sizeof(c), 0, (struct sockaddr *)&sun,
sizeof(sun));
if (len < 0)
warn("datagram_client: sendto");
close(fd);
}
}
static void
datagram_test(void)
{
struct sockaddr_un sun;
pid_t childpid;
int serverfd;
serverfd = socket(PF_UNIX, SOCK_DGRAM, 0);
if (serverfd < 0)
err(-1, "datagram_test: socket");
bzero(&sun, sizeof(sun));
sun.sun_len = sizeof(sun);
sun.sun_family = AF_UNIX;
strcpy(sun.sun_path, socket_path);
if (bind(serverfd, (struct sockaddr *)&sun, sizeof(sun)) < 0)
err(-1, "datagram_test: bind");
childpid = fork();
if (childpid < 0)
err(-1, "datagram_test: fork");
if (childpid != 0) {
sleep(1);
datagram_client();
kill(childpid, SIGTERM);
sleep(1);
} else
datagram_server(serverfd);
(void)unlink(socket_path);
}
int
main(void)
{
if (mkstemp(socket_path) == -1)
err(1, "mkstemp failed");
(void)unlink(socket_path);
datagram_test();
if (0)
stream_test();
return (0);
}
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