mirror of
https://github.com/zeromq/libzmq.git
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251 lines
7.7 KiB
C++
251 lines
7.7 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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int main (void)
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{
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setup_test_environment ();
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int val;
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int rc;
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char buffer[16];
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size_t len = MAX_SOCKET_STRING;
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char my_endpoint[MAX_SOCKET_STRING];
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// TEST 1.
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// First we're going to attempt to send messages to two
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// pipes, one connected, the other not. We should see
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// the PUSH load balancing to both pipes, and hence half
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// of the messages getting queued, as connect() creates a
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// pipe immediately.
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void *context = zmq_ctx_new ();
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assert (context);
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void *to = zmq_socket (context, ZMQ_PULL);
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assert (to);
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// Bind the one valid receiver
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val = 0;
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rc = zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof (val));
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assert (rc == 0);
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rc = zmq_bind (to, "tcp://127.0.0.1:*");
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assert (rc == 0);
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rc = zmq_getsockopt (to, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
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assert (rc == 0);
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// Create a socket pushing to two endpoints - only 1 message should arrive.
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void *from = zmq_socket (context, ZMQ_PUSH);
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assert (from);
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val = 0;
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zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof (val));
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// This pipe will not connect
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rc = zmq_connect (from, "tcp://localhost:5556");
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assert (rc == 0);
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// This pipe will
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rc = zmq_connect (from, my_endpoint);
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assert (rc == 0);
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msleep (SETTLE_TIME);
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// We send 10 messages, 5 should just get stuck in the queue
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// for the not-yet-connected pipe
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for (int i = 0; i < 10; ++i) {
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rc = zmq_send (from, "Hello", 5, 0);
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assert (rc == 5);
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}
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// We now consume from the connected pipe
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// - we should see just 5
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int timeout = 250;
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rc = zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int));
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assert (rc == 0);
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int seen = 0;
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while (true) {
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rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
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if (rc == -1)
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break; // Break when we didn't get a message
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seen++;
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}
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assert (seen == 5);
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rc = zmq_close (from);
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assert (rc == 0);
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rc = zmq_close (to);
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assert (rc == 0);
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rc = zmq_ctx_term (context);
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assert (rc == 0);
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// TEST 2
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// This time we will do the same thing, connect two pipes,
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// one of which will succeed in connecting to a bound
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// receiver, the other of which will fail. However, we will
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// also set the delay attach on connect flag, which should
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// cause the pipe attachment to be delayed until the connection
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// succeeds.
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context = zmq_ctx_new ();
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// Bind the valid socket
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to = zmq_socket (context, ZMQ_PULL);
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assert (to);
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rc = zmq_bind (to, "tcp://127.0.0.1:*");
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assert (rc == 0);
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len = MAX_SOCKET_STRING;
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rc = zmq_getsockopt (to, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
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assert (rc == 0);
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val = 0;
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rc = zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof (val));
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assert (rc == 0);
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// Create a socket pushing to two endpoints - all messages should arrive.
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from = zmq_socket (context, ZMQ_PUSH);
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assert (from);
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val = 0;
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rc = zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof (val));
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assert (rc == 0);
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// Set the key flag
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val = 1;
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rc = zmq_setsockopt (from, ZMQ_IMMEDIATE, &val, sizeof (val));
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assert (rc == 0);
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// Connect to the invalid socket
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rc = zmq_connect (from, "tcp://localhost:5561");
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assert (rc == 0);
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// Connect to the valid socket
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rc = zmq_connect (from, my_endpoint);
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assert (rc == 0);
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// Send 10 messages, all should be routed to the connected pipe
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for (int i = 0; i < 10; ++i) {
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rc = zmq_send (from, "Hello", 5, 0);
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assert (rc == 5);
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}
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rc = zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int));
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assert (rc == 0);
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seen = 0;
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while (true) {
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rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
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if (rc == -1)
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break; // Break when we didn't get a message
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seen++;
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}
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assert (seen == 10);
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rc = zmq_close (from);
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assert (rc == 0);
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rc = zmq_close (to);
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assert (rc == 0);
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rc = zmq_ctx_term (context);
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assert (rc == 0);
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// TEST 3
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// This time we want to validate that the same blocking behaviour
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// occurs with an existing connection that is broken. We will send
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// messages to a connected pipe, disconnect and verify the messages
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// block. Then we reconnect and verify messages flow again.
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context = zmq_ctx_new ();
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void *backend = zmq_socket (context, ZMQ_DEALER);
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assert (backend);
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void *frontend = zmq_socket (context, ZMQ_DEALER);
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assert (frontend);
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int zero = 0;
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rc = zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero));
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assert (rc == 0);
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rc = zmq_setsockopt (frontend, ZMQ_LINGER, &zero, sizeof (zero));
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assert (rc == 0);
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// Frontend connects to backend using IMMEDIATE
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int on = 1;
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rc = zmq_setsockopt (frontend, ZMQ_IMMEDIATE, &on, sizeof (on));
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assert (rc == 0);
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rc = zmq_bind (backend, "tcp://127.0.0.1:*");
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assert (rc == 0);
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len = MAX_SOCKET_STRING;
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rc = zmq_getsockopt (backend, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
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assert (rc == 0);
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rc = zmq_connect (frontend, my_endpoint);
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assert (rc == 0);
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// Ping backend to frontend so we know when the connection is up
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rc = zmq_send (backend, "Hello", 5, 0);
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assert (rc == 5);
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rc = zmq_recv (frontend, buffer, 255, 0);
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assert (rc == 5);
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// Send message from frontend to backend
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rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
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assert (rc == 5);
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rc = zmq_close (backend);
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assert (rc == 0);
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// Give time to process disconnect
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msleep (SETTLE_TIME * 10);
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// Send a message, should fail
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rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
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assert (rc == -1);
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// Recreate backend socket
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backend = zmq_socket (context, ZMQ_DEALER);
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assert (backend);
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rc = zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero));
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assert (rc == 0);
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rc = zmq_bind (backend, my_endpoint);
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assert (rc == 0);
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// Ping backend to frontend so we know when the connection is up
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rc = zmq_send (backend, "Hello", 5, 0);
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assert (rc == 5);
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rc = zmq_recv (frontend, buffer, 255, 0);
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assert (rc == 5);
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// After the reconnect, should succeed
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rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
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assert (rc == 5);
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rc = zmq_close (backend);
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assert (rc == 0);
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rc = zmq_close (frontend);
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assert (rc == 0);
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rc = zmq_ctx_term (context);
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assert (rc == 0);
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}
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