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6737d50933
Solution: add socket option ZMQ_XSUB_VERBOSE_UNSUBSCRIBE to forward all unsubscribe messages
132 lines
4.6 KiB
C++
132 lines
4.6 KiB
C++
/*
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Copyright (c) 2021 Contributors as noted in the AUTHORS file
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This file is part of libzmq, the ZeroMQ core engine in C++.
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libzmq is free software; you can redistribute it and/or modify it under
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the terms of the GNU Lesser General Public License (LGPL) as published
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by the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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As a special exception, the Contributors give you permission to link
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this library with independent modules to produce an executable,
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regardless of the license terms of these independent modules, and to
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copy and distribute the resulting executable under terms of your choice,
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provided that you also meet, for each linked independent module, the
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terms and conditions of the license of that module. An independent
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module is a module which is not derived from or based on this library.
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If you modify this library, you must extend this exception to your
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version of the library.
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libzmq is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "testutil.hpp"
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#include "testutil_unity.hpp"
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SETUP_TEARDOWN_TESTCONTEXT
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const uint8_t unsubscribe_a_msg[] = {0, 'A'};
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const uint8_t subscribe_a_msg[] = {1, 'A'};
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const char test_endpoint[] = "inproc://soname";
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void test_xsub_verbose_unsubscribe ()
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{
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void *pub = test_context_socket (ZMQ_XPUB);
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TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (pub, test_endpoint));
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void *sub = test_context_socket (ZMQ_XSUB);
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TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (sub, test_endpoint));
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// set option ZMQ_XPUB_VERBOSER to get all messages
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int xbup_verboser = 1;
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TEST_ASSERT_SUCCESS_ERRNO (
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zmq_setsockopt (pub, ZMQ_XPUB_VERBOSER, &xbup_verboser, sizeof (int)));
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// unsubscribe from topic A, does not exist yet
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send_array_expect_success (sub, unsubscribe_a_msg, 0);
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// does not exist, so it will be filtered out by XSUB
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TEST_ASSERT_FAILURE_ERRNO (EAGAIN, zmq_recv (pub, NULL, 0, ZMQ_DONTWAIT));
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// subscribe to topic A
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send_array_expect_success (sub, subscribe_a_msg, 0);
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// receive subscription from subscriber
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recv_array_expect_success (pub, subscribe_a_msg, 0);
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// subscribe again to topic A
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send_array_expect_success (sub, subscribe_a_msg, 0);
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// receive subscription from subscriber
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recv_array_expect_success (pub, subscribe_a_msg, 0);
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// unsubscribe from topic A
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send_array_expect_success (sub, unsubscribe_a_msg, 0);
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// The first unsubscribe will be filtered out
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TEST_ASSERT_FAILURE_ERRNO (EAGAIN, zmq_recv (pub, NULL, 0, ZMQ_DONTWAIT));
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// unsubscribe again from topic A
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send_array_expect_success (sub, unsubscribe_a_msg, 0);
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// receive unsubscription from subscriber
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recv_array_expect_success (pub, unsubscribe_a_msg, 0);
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// set option ZMQ_XSUB_VERBOSE_UNSUBSCRIBE to get duplicate unsubscribes
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int xsub_verbose = 1;
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TEST_ASSERT_SUCCESS_ERRNO (zmq_setsockopt (
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sub, ZMQ_XSUB_VERBOSE_UNSUBSCRIBE, &xsub_verbose, sizeof (int)));
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// unsubscribe from topic A, does not exist yet
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send_array_expect_success (sub, unsubscribe_a_msg, 0);
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// does not exist, but with ZMQ_XSUB_VERBOSE_UNSUBSCRIBE set it will be forwarded anyway
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recv_array_expect_success (pub, unsubscribe_a_msg, 0);
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// subscribe to topic A
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send_array_expect_success (sub, subscribe_a_msg, 0);
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// receive subscription from subscriber
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recv_array_expect_success (pub, subscribe_a_msg, 0);
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// subscribe again to topic A
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send_array_expect_success (sub, subscribe_a_msg, 0);
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// receive subscription from subscriber
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recv_array_expect_success (pub, subscribe_a_msg, 0);
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// unsubscribe from topic A
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send_array_expect_success (sub, unsubscribe_a_msg, 0);
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// receive unsubscription from subscriber
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recv_array_expect_success (pub, unsubscribe_a_msg, 0);
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// unsubscribe again from topic A
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send_array_expect_success (sub, unsubscribe_a_msg, 0);
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// receive unsubscription from subscriber
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recv_array_expect_success (pub, unsubscribe_a_msg, 0);
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// Clean up.
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test_context_socket_close (pub);
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test_context_socket_close (sub);
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}
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int main ()
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{
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setup_test_environment ();
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UNITY_BEGIN ();
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RUN_TEST (test_xsub_verbose_unsubscribe);
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return UNITY_END ();
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}
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