mirror of
https://github.com/zeromq/libzmq.git
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221 lines
6.9 KiB
C++
221 lines
6.9 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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static void bounce (void *socket)
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{
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int more;
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size_t more_size = sizeof (more);
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do {
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zmq_msg_t recv_part, sent_part;
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int rc = zmq_msg_init (&recv_part);
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assert (rc == 0);
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rc = zmq_msg_recv (&recv_part, socket, 0);
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assert (rc != -1);
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rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size);
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assert (rc == 0);
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zmq_msg_init (&sent_part);
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zmq_msg_copy (&sent_part, &recv_part);
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rc = zmq_msg_send (&sent_part, socket, more ? ZMQ_SNDMORE : 0);
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assert (rc != -1);
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zmq_msg_close (&recv_part);
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} while (more);
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}
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static int get_events (void *socket)
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{
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int rc;
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int events;
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size_t events_size = sizeof (events);
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rc = zmq_getsockopt (socket, ZMQ_EVENTS, &events, &events_size);
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assert (rc == 0);
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return events;
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}
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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 *ctx = zmq_ctx_new ();
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assert (ctx);
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void *req = zmq_socket (ctx, ZMQ_REQ);
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assert (req);
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int enabled = 1;
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int rc = zmq_setsockopt (req, ZMQ_REQ_RELAXED, &enabled, sizeof (int));
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assert (rc == 0);
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rc = zmq_setsockopt (req, ZMQ_REQ_CORRELATE, &enabled, sizeof (int));
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assert (rc == 0);
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rc = zmq_bind (req, "tcp://127.0.0.1:*");
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assert (rc == 0);
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rc = zmq_getsockopt (req, ZMQ_LAST_ENDPOINT, my_endpoint, &len);
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assert (rc == 0);
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const size_t services = 5;
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void *rep[services];
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for (size_t peer = 0; peer < services; peer++) {
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rep[peer] = zmq_socket (ctx, ZMQ_REP);
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assert (rep[peer]);
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int timeout = 500;
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rc = zmq_setsockopt (rep[peer], ZMQ_RCVTIMEO, &timeout, sizeof (int));
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assert (rc == 0);
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rc = zmq_connect (rep[peer], my_endpoint);
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assert (rc == 0);
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}
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// We have to give the connects time to finish otherwise the requests
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// will not properly round-robin. We could alternatively connect the
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// REQ sockets to the REP sockets.
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msleep (SETTLE_TIME);
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// Case 1: Second send() before a reply arrives in a pipe.
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int events = get_events (req);
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assert (events == ZMQ_POLLOUT);
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// Send a request, ensure it arrives, don't send a reply
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s_send_seq (req, "A", "B", SEQ_END);
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s_recv_seq (rep[0], "A", "B", SEQ_END);
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events = get_events (req);
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assert (events == ZMQ_POLLOUT);
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// Send another request on the REQ socket
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s_send_seq (req, "C", "D", SEQ_END);
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s_recv_seq (rep[1], "C", "D", SEQ_END);
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events = get_events (req);
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assert (events == ZMQ_POLLOUT);
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// Send a reply to the first request - that should be discarded by the REQ
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s_send_seq (rep[0], "WRONG", SEQ_END);
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// Send the expected reply
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s_send_seq (rep[1], "OK", SEQ_END);
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s_recv_seq (req, "OK", SEQ_END);
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// Another standard req-rep cycle, just to check
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s_send_seq (req, "E", SEQ_END);
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s_recv_seq (rep[2], "E", SEQ_END);
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s_send_seq (rep[2], "F", "G", SEQ_END);
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s_recv_seq (req, "F", "G", SEQ_END);
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// Case 2: Second send() after a reply is already in a pipe on the REQ.
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// Send a request, ensure it arrives, send a reply
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s_send_seq (req, "H", SEQ_END);
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s_recv_seq (rep[3], "H", SEQ_END);
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s_send_seq (rep[3], "BAD", SEQ_END);
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// Wait for message to be there.
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msleep (SETTLE_TIME);
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// Without receiving that reply, send another request on the REQ socket
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s_send_seq (req, "I", SEQ_END);
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s_recv_seq (rep[4], "I", SEQ_END);
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// Send the expected reply
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s_send_seq (rep[4], "GOOD", SEQ_END);
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s_recv_seq (req, "GOOD", SEQ_END);
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// Case 3: Check issue #1690. Two send() in a row should not close the
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// communication pipes. For example pipe from req to rep[0] should not be
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// closed after executing Case 1. So rep[0] should be the next to receive,
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// not rep[1].
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s_send_seq (req, "J", SEQ_END);
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s_recv_seq (rep[0], "J", SEQ_END);
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close_zero_linger (req);
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for (size_t peer = 0; peer < services; peer++)
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close_zero_linger (rep[peer]);
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// Wait for disconnects.
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msleep (SETTLE_TIME);
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// Case 4: Check issue #1695. As messages may pile up before a responder
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// is available, we check that responses to messages other than the last
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// sent one are correctly discarded by the REQ pipe
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// Setup REQ socket as client
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req = zmq_socket (ctx, ZMQ_REQ);
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assert (req);
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rc = zmq_setsockopt (req, ZMQ_REQ_RELAXED, &enabled, sizeof (int));
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assert (rc == 0);
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rc = zmq_setsockopt (req, ZMQ_REQ_CORRELATE, &enabled, sizeof (int));
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assert (rc == 0);
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rc = zmq_connect (req, ENDPOINT_0);
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assert (rc == 0);
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// Setup ROUTER socket as server but do not bind it just yet
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void *router = zmq_socket (ctx, ZMQ_ROUTER);
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assert (router);
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// Send two requests
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s_send_seq (req, "TO_BE_DISCARDED", SEQ_END);
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s_send_seq (req, "TO_BE_ANSWERED", SEQ_END);
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// Bind server allowing it to receive messages
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rc = zmq_bind (router, ENDPOINT_0);
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assert (rc == 0);
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// Read the two messages and send them back as is
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bounce (router);
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bounce (router);
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// Read the expected correlated reply. As the ZMQ_REQ_CORRELATE is active,
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// the expected answer is "TO_BE_ANSWERED", not "TO_BE_DISCARDED".
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s_recv_seq (req, "TO_BE_ANSWERED", SEQ_END);
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close_zero_linger (req);
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close_zero_linger (router);
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// Wait for disconnects.
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msleep (SETTLE_TIME);
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rc = zmq_ctx_term (ctx);
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assert (rc == 0);
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return 0;
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}
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