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100 lines
3.8 KiB
C++
100 lines
3.8 KiB
C++
/*
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Copyright (c) 2007-2017 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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// Issue 566 describes a problem in libzmq v4.0.0 where a dealer to router
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// connection would fail randomly. The test works when the two sockets are
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// on the same context, and failed when they were on separate contexts.
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// Fixed by https://github.com/zeromq/libzmq/commit/be25cf.
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int main (void)
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{
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setup_test_environment ();
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size_t len = MAX_SOCKET_STRING;
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char my_endpoint[MAX_SOCKET_STRING];
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void *ctx1 = zmq_ctx_new ();
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assert (ctx1);
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void *ctx2 = zmq_ctx_new ();
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assert (ctx2);
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void *router = zmq_socket (ctx1, ZMQ_ROUTER);
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int on = 1;
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int rc = zmq_setsockopt (router, ZMQ_ROUTER_MANDATORY, &on, sizeof (on));
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assert (rc == 0);
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rc = zmq_bind (router, "tcp://127.0.0.1:*");
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assert (rc != -1);
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rc = zmq_getsockopt (router, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
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assert (rc == 0);
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// Repeat often enough to be sure this works as it should
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for (int cycle = 0; cycle < 100; cycle++) {
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// Create dealer with unique explicit routing id
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// We assume the router learns this out-of-band
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void *dealer = zmq_socket (ctx2, ZMQ_DEALER);
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char routing_id[10];
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sprintf (routing_id, "%09d", cycle);
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rc = zmq_setsockopt (dealer, ZMQ_ROUTING_ID, routing_id, 10);
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assert (rc == 0);
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int rcvtimeo = 1000;
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rc = zmq_setsockopt (dealer, ZMQ_RCVTIMEO, &rcvtimeo, sizeof (int));
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assert (rc == 0);
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rc = zmq_connect (dealer, my_endpoint);
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assert (rc == 0);
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// Router will try to send to dealer, at short intervals.
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// It typically takes 2-5 msec for the connection to establish
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// on a loopback interface, but we'll allow up to one second
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// before failing the test (e.g. for running on a debugger or
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// a very slow system).
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for (int attempt = 0; attempt < 500; attempt++) {
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zmq_poll (0, 0, 2);
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rc = zmq_send (router, routing_id, 10, ZMQ_SNDMORE);
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if (rc == -1 && errno == EHOSTUNREACH)
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continue;
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assert (rc == 10);
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rc = zmq_send (router, "HELLO", 5, 0);
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assert (rc == 5);
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break;
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}
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uint8_t buffer[5];
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rc = zmq_recv (dealer, buffer, 5, 0);
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assert (rc == 5);
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assert (memcmp (buffer, "HELLO", 5) == 0);
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close_zero_linger (dealer);
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}
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zmq_close (router);
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zmq_ctx_destroy (ctx1);
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zmq_ctx_destroy (ctx2);
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return 0;
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}
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