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tests/kern: add tests for PF_UNIX/SOCK_DGRAM

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This commit is contained in:
Gleb Smirnoff 2022-05-12 11:02:41 -07:00
parent 3e11d3f61a
commit 6d31772360
2 changed files with 218 additions and 0 deletions
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1
tests/sys/kern/Makefile
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@ -35,6 +35,7 @@ ATF_TESTS_C+= subr_physmem_test
PLAIN_TESTS_C+= subr_unit_test
ATF_TESTS_C+= sysctl_kern_proc
ATF_TESTS_C+= sys_getrandom
ATF_TESTS_C+= unix_dgram
ATF_TESTS_C+= unix_passfd_test
ATF_TESTS_C+= unix_seqpacket_test
TEST_METADATA.unix_seqpacket_test+= timeout="15"

217
tests/sys/kern/unix_dgram.c Normal file
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@ -0,0 +1,217 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2022 Gleb Smirnoff <glebius@FreeBSD.org>
*
* 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/time.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/un.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <atf-c.h>
static struct itimerval itv = {
.it_interval = { 0, 0 },
.it_value = { 1, 0 }, /* one second */
};
static sig_atomic_t timer_done = 0;
static void
sigalarm(int sig __unused)
{
timer_done = 1;
}
static struct sigaction sigact = {
.sa_handler = sigalarm,
};
/*
* Fill socket to a state when next send(len) would fail.
*/
static void
fill(int fd, void *buf, ssize_t len)
{
unsigned long recvspace;
size_t llen = sizeof(unsigned long);
ssize_t sent;
ATF_REQUIRE(sysctlbyname("net.local.dgram.recvspace", &recvspace,
&llen, NULL, 0) == 0);
for (sent = 0; sent + len < (ssize_t)recvspace; sent += len)
ATF_REQUIRE(send(fd, buf, len, 0) == len);
}
ATF_TC_WITHOUT_HEAD(basic);
ATF_TC_BODY(basic, tc)
{
struct msghdr msg;
struct iovec iov[1];
unsigned long maxdgram;
size_t llen = sizeof(unsigned long);
int fd[2];
char *buf;
/* Allocate and initialize:
* - fd[0] to send, fd[1] to receive
* - buf[maxdgram] for data
*/
ATF_REQUIRE(sysctlbyname("net.local.dgram.maxdgram", &maxdgram,
&llen, NULL, 0) == 0);
ATF_REQUIRE(socketpair(PF_UNIX, SOCK_DGRAM, 0, fd) != -1);
buf = malloc(maxdgram + 1);
ATF_REQUIRE(buf);
msg = (struct msghdr ){
.msg_iov = iov,
.msg_iovlen = 1,
};
iov[0] = (struct iovec ){
.iov_base = buf,
};
/* Fail to send > maxdgram. */
ATF_REQUIRE(send(fd[0], buf, maxdgram + 1, 0) == -1);
ATF_REQUIRE(errno == EMSGSIZE);
/* Send maxdgram. */
ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == (ssize_t)maxdgram);
/* Exercise MSG_PEEK, full and truncated.. */
ATF_REQUIRE(recv(fd[1], buf, maxdgram, MSG_PEEK) == (ssize_t)maxdgram);
iov[0].iov_len = 42;
ATF_REQUIRE(recvmsg(fd[1], &msg, MSG_PEEK) == 42);
ATF_REQUIRE(msg.msg_flags == (MSG_PEEK | MSG_TRUNC));
/* Receive maxdgram. */
iov[0].iov_len = maxdgram;
ATF_REQUIRE(recvmsg(fd[1], &msg, 0) == (ssize_t)maxdgram);
ATF_REQUIRE(msg.msg_flags == 0);
/* Receive truncated message. */
ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == (ssize_t)maxdgram);
iov[0].iov_len = maxdgram / 2;
ATF_REQUIRE(recvmsg(fd[1], &msg, 0) == (ssize_t)maxdgram / 2);
ATF_REQUIRE(msg.msg_flags == MSG_TRUNC);
/* Empty: block. */
ATF_REQUIRE(sigaction(SIGALRM, &sigact, NULL) == 0);
ATF_REQUIRE(timer_done == 0);
ATF_REQUIRE(setitimer(ITIMER_REAL, &itv, NULL) == 0);
ATF_REQUIRE(recv(fd[1], buf, maxdgram, 0) == -1);
ATF_REQUIRE(errno == EINTR);
ATF_REQUIRE(timer_done == 1);
/* Don't block with MSG_DONTWAIT. */
ATF_REQUIRE(recv(fd[1], buf, maxdgram, MSG_DONTWAIT) == -1);
ATF_REQUIRE(errno == EAGAIN);
/* Don't block with O_NONBLOCK. */
ATF_REQUIRE(fcntl(fd[1], F_SETFL, O_NONBLOCK) != -1);
ATF_REQUIRE(recv(fd[1], buf, maxdgram, 0) == -1);
ATF_REQUIRE(errno == EAGAIN);
/* Fail with ENOBUFS on full socket. */
fill(fd[0], buf, maxdgram);
ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == -1);
ATF_REQUIRE(errno == ENOBUFS);
/* Fail with EAGAIN with O_NONBLOCK set. */
ATF_REQUIRE(fcntl(fd[0], F_SETFL, O_NONBLOCK) != -1);
ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == -1);
ATF_REQUIRE(errno == EAGAIN);
/* Remote side closed -> ECONNRESET. */
close(fd[1]);
ATF_REQUIRE(send(fd[0], buf, maxdgram, 0) == -1);
ATF_REQUIRE(errno == ECONNRESET);
}
ATF_TC_WITHOUT_HEAD(one2many);
ATF_TC_BODY(one2many, tc)
{
struct sockaddr_un sun;
const char *path = "unix_dgram_listener";
int one, many[2], two;
char buf[1024];
/* Establish one to many connection. */
ATF_REQUIRE((one = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0);
bzero(&sun, sizeof(sun));
sun.sun_family = AF_LOCAL;
sun.sun_len = sizeof(sun);
strlcpy(sun.sun_path, path, sizeof(sun.sun_path));
ATF_REQUIRE(bind(one, (struct sockaddr *)&sun, sizeof(sun)) == 0);
/* listen(2) shall fail. */
ATF_REQUIRE(listen(one, -1) != 0);
for (int i = 0; i < 2; i++) {
ATF_REQUIRE((many[i] = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0);
ATF_REQUIRE(connect(many[i], (struct sockaddr *)&sun,
sizeof(sun)) == 0);
}
/* accept() on UNIX/DGRAM is invalid. */
ATF_REQUIRE(accept(one, NULL, NULL) == -1);
ATF_REQUIRE(errno == EINVAL);
/*
* Connecting a bound socket to self: a strange, useless, but
* historically existing edge case that is not explicitly described
* in SuS, neither is forbidden there. Works on FreeBSD and Linux.
*/
ATF_REQUIRE(connect(one, (struct sockaddr *)&sun, sizeof(sun)) == 0);
ATF_REQUIRE(send(one, buf, 42, 0) == 42);
ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == 42);
/*
* Sending from an unconnected socket to a bound socket. Connection is
* created for the duration of the syscall.
*/
ATF_REQUIRE((two = socket(PF_UNIX, SOCK_DGRAM, 0)) > 0);
ATF_REQUIRE(sendto(two, buf, 43, 0, (struct sockaddr *)&sun,
sizeof(sun)) == 43);
ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == 43);
/* One sender can fill the receive side.
* Current behavior which needs improvement.
*/
fill(many[0], buf, sizeof(buf));
ATF_REQUIRE(send(many[1], buf, sizeof(buf), 0) == -1);
ATF_REQUIRE(errno == ENOBUFS);
ATF_REQUIRE(recv(one, buf, sizeof(buf), 0) == sizeof(buf));
ATF_REQUIRE(send(many[1], buf, sizeof(buf), 0) == sizeof(buf));
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, basic);
ATF_TP_ADD_TC(tp, one2many);
return (atf_no_error());
}