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/* SPDX-License-Identifier: MPL-2.0 */
#include "testutil.hpp"
#include "testutil_unity.hpp"
SETUP_TEARDOWN_TESTCONTEXT
// Issue 566 describes a problem in libzmq v4.0.0 where a dealer to router
// connection would fail randomly. The test works when the two sockets are
// on the same context, and failed when they were on separate contexts.
// Fixed by https://github.com/zeromq/libzmq/commit/be25cf.
void test_issue_566 ()
{
char my_endpoint[MAX_SOCKET_STRING];
void *ctx1 = zmq_ctx_new ();
TEST_ASSERT_NOT_NULL (ctx1);
void *ctx2 = zmq_ctx_new ();
TEST_ASSERT_NOT_NULL (ctx2);
void *router = zmq_socket (ctx1, ZMQ_ROUTER);
int on = 1;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (router, ZMQ_ROUTER_MANDATORY, &on, sizeof (on)));
bind_loopback_ipv4 (router, my_endpoint, sizeof (my_endpoint));
// Repeat often enough to be sure this works as it should
for (int cycle = 0; cycle < 100; cycle++) {
// Create dealer with unique explicit routing id
// We assume the router learns this out-of-band
void *dealer = zmq_socket (ctx2, ZMQ_DEALER);
// Leave space for NULL char from sprintf, gcc warning
char routing_id[11];
snprintf (routing_id, 11 * sizeof (char), "%09d", cycle);
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (dealer, ZMQ_ROUTING_ID, routing_id, 10));
int rcvtimeo = 1000;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (dealer, ZMQ_RCVTIMEO, &rcvtimeo, sizeof (int)));
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (dealer, my_endpoint));
// Router will try to send to dealer, at short intervals.
// It typically takes 2-5 msec for the connection to establish
// on a loopback interface, but we'll allow up to one second
// before failing the test (e.g. for running on a debugger or
// a very slow system).
for (int attempt = 0; attempt < 500; attempt++) {
zmq_poll (NULL, 0, 2);
int rc = zmq_send (router, routing_id, 10, ZMQ_SNDMORE);
if (rc == -1 && errno == EHOSTUNREACH)
continue;
TEST_ASSERT_EQUAL (10, rc);
send_string_expect_success (router, "HELLO", 0);
break;
}
recv_string_expect_success (dealer, "HELLO", 0);
close_zero_linger (dealer);
}
zmq_close (router);
zmq_ctx_destroy (ctx1);
zmq_ctx_destroy (ctx2);
}
int main ()
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_issue_566);
return UNITY_END ();
}
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