socket: Add new test for shutdown

This commit adds shutdown test with SHUT_RD, SHUT_WR, SHUT_RDWR for an
UNIX socket connection.

Reviewed-by: DJ Delorie <dj@redhat.com>
This commit is contained in:
Sergey Kolosov 2024-06-25 11:19:03 +02:00 committed by DJ Delorie
parent d2f6ceaccb
commit 50f5a09e68
2 changed files with 258 additions and 0 deletions

View File

@ -71,6 +71,7 @@ tests := \
tst-cmsg_cloexec \
tst-cmsghdr \
tst-connect \
tst-shutdown \
tst-sockopt \
# tests

257
socket/tst-shutdown.c Normal file
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@ -0,0 +1,257 @@
/* Test the shutdown function.
Copyright (C) 2024 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
#include <support/check.h>
#include <support/support.h>
#include <support/xsocket.h>
#include <support/xunistd.h>
#include <sys/socket.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
struct connection
{
int sockets[2];
};
void
establish_connection (struct connection *conn)
{
if (socketpair (AF_UNIX, SOCK_STREAM, 0, conn->sockets) != 0)
{
FAIL_EXIT1 ("socketpair (AF_UNIX, SOCK_STREAM, 0): %m\n");
}
}
void
close_connection (struct connection *conn)
{
xclose (conn->sockets[0]);
xclose (conn->sockets[1]);
}
/* Open a file and check that shutdown fails with the ENOTSOCK error code. */
void
do_test_enotsock (void)
{
/* Open file and check that shutdown will fail with ENOTSOCK. */
int fd = xopen ("/dev/null", O_RDWR, 0);
int result = shutdown (fd, SHUT_RD);
if (result == 0 || errno != ENOTSOCK)
{
FAIL_EXIT1 ("shutdown should fail with ENOTSOCK");
}
xclose (fd);
}
/* Test shutdown with SHUT_RD. */
void
do_test_shut_rd (void)
{
struct connection conn;
const char *str = "AAAAAAA";
int len = 8;
int ret;
void *s_buf = xmalloc (len);
bzero (s_buf, len);
establish_connection (&conn);
int server = conn.sockets[0];
int client = conn.sockets[1];
/* Call shutdown with SHUT_RD on server socket. */
if (shutdown (server, SHUT_RD) != 0)
{
FAIL_EXIT1 ("shutdown with SHUT_RD on socket %d failed", server);
}
ret = send (server, str, len, 0);
if (ret <= 0)
{
FAIL_EXIT1 ("send (%d, data, %d): %m", server, len);
}
ret = recv (client, s_buf, len, 0);
if (ret <= 0)
{
FAIL_EXIT1 ("recv (%d, data, %d): %m", client, len);
}
TEST_COMPARE_BLOB (str, len, s_buf, len);
/* Send data should be disallowed on shutdown socket. */
errno = 0;
ret = send (client, str, len, MSG_NOSIGNAL);
if (ret >= 0 || errno != EPIPE)
{
FAIL_EXIT1 ("Send on SHUT_RD socket should be disallowed: %m");
}
/* Recv should return zero and no error. */
errno = 0;
ret = recv (server, s_buf, len, 0);
if (ret != 0 || errno != 0)
{
FAIL_EXIT1 ("recv should return 0 without error: %m");
}
close_connection (&conn);
}
/* Test shutdown with SHUT_WR. */
void
do_test_shut_wr (void)
{
struct connection conn;
const char *str1 = "CCCCCCC";
const char *str2 = "DDDDDDD";
const char *str3 = "EEEEEEE";
int len = 8;
int ret;
void *c_buf = xmalloc (len);
void *s_buf = xmalloc (len);
establish_connection (&conn);
int server = conn.sockets[0];
int client = conn.sockets[1];
xwrite (client, str1, len);
if (shutdown (client, SHUT_WR) != 0)
{
FAIL_EXIT1 ("shutdown with SHUT_WR on socket %d failed", client);
}
ret = send (client, str2, len, MSG_NOSIGNAL);
if (ret >= 0)
{
FAIL_EXIT1 ("send on SHUT_WR socket should fail");
}
/* Read data written before shutdown and check if it's correct. */
xread (server, s_buf, len);
TEST_COMPARE_BLOB (str1, len, s_buf, len);
/* Second read should return zero without error. */
errno = 0;
if (read (server, s_buf, len) != 0 || errno != 0)
{
FAIL_EXIT1 ("read after shutdown should return zero without error: %m");
}
/* Write some data to socket and check it still can be read on other side. */
memcpy (s_buf, str3, len);
xwrite (server, s_buf, len);
xread (client, c_buf, len);
TEST_COMPARE_BLOB (s_buf, len, c_buf, len);
close_connection (&conn);
}
/* Test shutdown with SHUT_RDWR. */
void
do_test_shut_rdwr (void)
{
struct connection conn;
struct sockaddr peer;
socklen_t peer_len = sizeof (peer);
const char *str1 = "FFFFFFF";
const char *str2 = "GGGGGGG";
int len = 8;
int ret;
void *s_buf = xmalloc (len);
bzero (s_buf, len);
establish_connection (&conn);
int server = conn.sockets[0];
int client = conn.sockets[1];
/* Send some data to both sockets before shutdown. */
xwrite (client, str1, len);
xwrite (server, str2, len);
/* Call shutdown with SHUT_RDWR on client socket. */
if (shutdown (client, SHUT_RDWR) != 0)
{
FAIL_EXIT1 ("shutdown with SHUT_RDWR on socket %d failed", client);
}
/* Verify that socket is still connected. */
xgetsockname (client, &peer, &peer_len);
/* Read data written before shutdown. */
xread (client, s_buf, len);
TEST_COMPARE_BLOB (s_buf, len, str2, len);
/* Second read should return zero, but no error. */
errno = 0;
if (read (client, s_buf, len) != 0 || errno != 0)
{
FAIL_EXIT1 ("read after shutdown should return zero without error: %m");
}
/* Send some data to shutdown socket and expect error. */
errno = 0;
ret = send (server, str2, len, MSG_NOSIGNAL);
if (ret >= 0 || errno != EPIPE)
{
FAIL_EXIT1 ("send to RDWR shutdown socket should fail with EPIPE");
}
/* Read data written before shutdown. */
xread (server, s_buf, len);
TEST_COMPARE_BLOB (s_buf, len, str1, len);
/* Second read should return zero, but no error. */
errno = 0;
if (read (server, s_buf, len) != 0 || errno != 0)
{
FAIL_EXIT1 ("read after shutdown should return zero without error: %m");
}
/* Send some data to shutdown socket and expect error. */
errno = 0;
ret = send (client, str1, len, MSG_NOSIGNAL);
if (ret >= 0 || errno != EPIPE)
{
FAIL_EXIT1 ("send to RDWR shutdown socket should fail with EPIPE");
}
close_connection (&conn);
}
static int
do_test (void)
{
do_test_enotsock ();
do_test_shut_rd ();
do_test_shut_wr ();
do_test_shut_rdwr ();
return 0;
}
#include <support/test-driver.c>