libzmq/tests/test_proxy_terminate.cpp

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/*
Copyright (c) 2007-2017 Contributors as noted in the AUTHORS file
This file is part of libzmq, the ZeroMQ core engine in C++.
libzmq is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
As a special exception, the Contributors give you permission to link
this library with independent modules to produce an executable,
regardless of the license terms of these independent modules, and to
copy and distribute the resulting executable under terms of your choice,
provided that you also meet, for each linked independent module, the
terms and conditions of the license of that module. An independent
module is a module which is not derived from or based on this library.
If you modify this library, you must extend this exception to your
version of the library.
libzmq 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "testutil.hpp"
#include "testutil_unity.hpp"
#include <stdlib.h>
SETUP_TEARDOWN_TESTCONTEXT
// This is a test for issue #1382. The server thread creates a SUB-PUSH
// steerable proxy. The main process then sends messages to the SUB
// but there is no pull on the other side, previously the proxy blocks
// in writing to the backend, preventing the proxy from terminating
void server_task (void * /*unused_*/)
{
char my_endpoint[MAX_SOCKET_STRING];
// Frontend socket talks to main process
void *frontend = zmq_socket (get_test_context (), ZMQ_SUB);
TEST_ASSERT_NOT_NULL (frontend);
TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (frontend, ZMQ_SUBSCRIBE, "", 0));
bind_loopback_ipv4 (frontend, my_endpoint, sizeof my_endpoint);
// Nice socket which is never read
void *backend = zmq_socket (get_test_context (), ZMQ_PUSH);
TEST_ASSERT_NOT_NULL (backend);
TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (backend, "tcp://127.0.0.1:*"));
// Control socket receives terminate command from main over inproc
void *control = zmq_socket (get_test_context (), ZMQ_REQ);
TEST_ASSERT_NOT_NULL (control);
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (control, "inproc://control"));
send_string_expect_success (control, my_endpoint, 0);
// Connect backend to frontend via a proxy
TEST_ASSERT_SUCCESS_ERRNO (
zmq_proxy_steerable (frontend, backend, NULL, control));
TEST_ASSERT_SUCCESS_ERRNO (zmq_close (frontend));
TEST_ASSERT_SUCCESS_ERRNO (zmq_close (backend));
TEST_ASSERT_SUCCESS_ERRNO (zmq_close (control));
}
// The main thread simply starts a basic steerable proxy server, publishes some messages, and then
// waits for the server to terminate.
void test_proxy_terminate ()
{
void *thread = zmq_threadstart (&server_task, NULL);
// Control socket receives terminate command from main over inproc
void *control = test_context_socket (ZMQ_REP);
TEST_ASSERT_NOT_NULL (control);
TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (control, "inproc://control"));
char *my_endpoint = s_recv (control);
TEST_ASSERT_NOT_NULL (my_endpoint);
msleep (500); // Run for 500 ms
// Start a secondary publisher which writes data to the SUB-PUSH server socket
void *publisher = test_context_socket (ZMQ_PUB);
TEST_ASSERT_NOT_NULL (publisher);
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (publisher, my_endpoint));
msleep (SETTLE_TIME);
send_string_expect_success (publisher, "This is a test", 0);
msleep (50);
send_string_expect_success (publisher, "This is a test", 0);
msleep (50);
send_string_expect_success (publisher, "This is a test", 0);
send_string_expect_success (control, "TERMINATE", 0);
test_context_socket_close (publisher);
test_context_socket_close (control);
free (my_endpoint);
zmq_threadclose (thread);
}
int main (void)
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_proxy_terminate);
return UNITY_END ();
}