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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
DJ Delorie
parent
d2f6ceaccb
commit
50f5a09e68
@ -71,6 +71,7 @@ tests := \
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tst-cmsg_cloexec \
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tst-cmsg_cloexec \
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tst-cmsghdr \
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tst-cmsghdr \
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tst-connect \
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tst-connect \
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tst-shutdown \
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tst-sockopt \
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tst-sockopt \
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# tests
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# tests
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257
socket/tst-shutdown.c
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257
socket/tst-shutdown.c
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@ -0,0 +1,257 @@
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/* Test the shutdown function.
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Copyright (C) 2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <arpa/inet.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdbool.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xsocket.h>
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#include <support/xunistd.h>
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#include <sys/socket.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <string.h>
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struct connection
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{
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int sockets[2];
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};
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void
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establish_connection (struct connection *conn)
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{
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if (socketpair (AF_UNIX, SOCK_STREAM, 0, conn->sockets) != 0)
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{
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FAIL_EXIT1 ("socketpair (AF_UNIX, SOCK_STREAM, 0): %m\n");
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}
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}
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void
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close_connection (struct connection *conn)
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{
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xclose (conn->sockets[0]);
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xclose (conn->sockets[1]);
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}
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/* Open a file and check that shutdown fails with the ENOTSOCK error code. */
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void
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do_test_enotsock (void)
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{
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/* Open file and check that shutdown will fail with ENOTSOCK. */
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int fd = xopen ("/dev/null", O_RDWR, 0);
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int result = shutdown (fd, SHUT_RD);
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if (result == 0 || errno != ENOTSOCK)
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{
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FAIL_EXIT1 ("shutdown should fail with ENOTSOCK");
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}
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xclose (fd);
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}
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/* Test shutdown with SHUT_RD. */
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void
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do_test_shut_rd (void)
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{
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struct connection conn;
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const char *str = "AAAAAAA";
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int len = 8;
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int ret;
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void *s_buf = xmalloc (len);
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bzero (s_buf, len);
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establish_connection (&conn);
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int server = conn.sockets[0];
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int client = conn.sockets[1];
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/* Call shutdown with SHUT_RD on server socket. */
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if (shutdown (server, SHUT_RD) != 0)
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{
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FAIL_EXIT1 ("shutdown with SHUT_RD on socket %d failed", server);
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}
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ret = send (server, str, len, 0);
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if (ret <= 0)
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{
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FAIL_EXIT1 ("send (%d, data, %d): %m", server, len);
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}
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ret = recv (client, s_buf, len, 0);
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if (ret <= 0)
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{
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FAIL_EXIT1 ("recv (%d, data, %d): %m", client, len);
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}
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TEST_COMPARE_BLOB (str, len, s_buf, len);
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/* Send data should be disallowed on shutdown socket. */
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errno = 0;
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ret = send (client, str, len, MSG_NOSIGNAL);
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if (ret >= 0 || errno != EPIPE)
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{
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FAIL_EXIT1 ("Send on SHUT_RD socket should be disallowed: %m");
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}
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/* Recv should return zero and no error. */
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errno = 0;
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ret = recv (server, s_buf, len, 0);
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if (ret != 0 || errno != 0)
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{
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FAIL_EXIT1 ("recv should return 0 without error: %m");
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}
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close_connection (&conn);
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}
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/* Test shutdown with SHUT_WR. */
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void
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do_test_shut_wr (void)
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{
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struct connection conn;
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const char *str1 = "CCCCCCC";
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const char *str2 = "DDDDDDD";
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const char *str3 = "EEEEEEE";
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int len = 8;
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int ret;
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void *c_buf = xmalloc (len);
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void *s_buf = xmalloc (len);
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establish_connection (&conn);
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int server = conn.sockets[0];
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int client = conn.sockets[1];
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xwrite (client, str1, len);
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if (shutdown (client, SHUT_WR) != 0)
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{
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FAIL_EXIT1 ("shutdown with SHUT_WR on socket %d failed", client);
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}
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ret = send (client, str2, len, MSG_NOSIGNAL);
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if (ret >= 0)
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{
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FAIL_EXIT1 ("send on SHUT_WR socket should fail");
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}
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/* Read data written before shutdown and check if it's correct. */
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xread (server, s_buf, len);
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TEST_COMPARE_BLOB (str1, len, s_buf, len);
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/* Second read should return zero without error. */
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errno = 0;
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if (read (server, s_buf, len) != 0 || errno != 0)
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{
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FAIL_EXIT1 ("read after shutdown should return zero without error: %m");
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}
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/* Write some data to socket and check it still can be read on other side. */
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memcpy (s_buf, str3, len);
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xwrite (server, s_buf, len);
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xread (client, c_buf, len);
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TEST_COMPARE_BLOB (s_buf, len, c_buf, len);
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close_connection (&conn);
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}
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/* Test shutdown with SHUT_RDWR. */
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void
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do_test_shut_rdwr (void)
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{
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struct connection conn;
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struct sockaddr peer;
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socklen_t peer_len = sizeof (peer);
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const char *str1 = "FFFFFFF";
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const char *str2 = "GGGGGGG";
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int len = 8;
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int ret;
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void *s_buf = xmalloc (len);
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bzero (s_buf, len);
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establish_connection (&conn);
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int server = conn.sockets[0];
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int client = conn.sockets[1];
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/* Send some data to both sockets before shutdown. */
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xwrite (client, str1, len);
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xwrite (server, str2, len);
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/* Call shutdown with SHUT_RDWR on client socket. */
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if (shutdown (client, SHUT_RDWR) != 0)
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{
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FAIL_EXIT1 ("shutdown with SHUT_RDWR on socket %d failed", client);
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}
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/* Verify that socket is still connected. */
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xgetsockname (client, &peer, &peer_len);
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/* Read data written before shutdown. */
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xread (client, s_buf, len);
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TEST_COMPARE_BLOB (s_buf, len, str2, len);
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/* Second read should return zero, but no error. */
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errno = 0;
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if (read (client, s_buf, len) != 0 || errno != 0)
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{
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FAIL_EXIT1 ("read after shutdown should return zero without error: %m");
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}
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/* Send some data to shutdown socket and expect error. */
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errno = 0;
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ret = send (server, str2, len, MSG_NOSIGNAL);
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if (ret >= 0 || errno != EPIPE)
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{
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FAIL_EXIT1 ("send to RDWR shutdown socket should fail with EPIPE");
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}
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/* Read data written before shutdown. */
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xread (server, s_buf, len);
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TEST_COMPARE_BLOB (s_buf, len, str1, len);
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/* Second read should return zero, but no error. */
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errno = 0;
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if (read (server, s_buf, len) != 0 || errno != 0)
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{
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FAIL_EXIT1 ("read after shutdown should return zero without error: %m");
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}
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/* Send some data to shutdown socket and expect error. */
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errno = 0;
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ret = send (client, str1, len, MSG_NOSIGNAL);
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if (ret >= 0 || errno != EPIPE)
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{
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FAIL_EXIT1 ("send to RDWR shutdown socket should fail with EPIPE");
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}
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close_connection (&conn);
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}
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static int
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do_test (void)
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{
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do_test_enotsock ();
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do_test_shut_rd ();
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do_test_shut_wr ();
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do_test_shut_rdwr ();
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return 0;
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}
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#include <support/test-driver.c>
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