/* Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file This file is part of 0MQ. 0MQ is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. 0MQ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this program. If not, see . */ #include "testutil.hpp" int main (void) { setup_test_environment(); void *ctx = zmq_ctx_new (); assert (ctx); void *req = zmq_socket (ctx, ZMQ_REQ); assert (req); int enabled = 1; int rc = zmq_setsockopt (req, ZMQ_REQ_RELAXED, &enabled, sizeof (int)); assert (rc == 0); rc = zmq_setsockopt (req, ZMQ_REQ_CORRELATE, &enabled, sizeof (int)); assert (rc == 0); rc = zmq_bind (req, "tcp://127.0.0.1:5555"); assert (rc == 0); const size_t services = 5; void *rep [services]; for (size_t peer = 0; peer < services; peer++) { rep [peer] = zmq_socket (ctx, ZMQ_REP); assert (rep [peer]); int timeout = 100; rc = zmq_setsockopt (rep [peer], ZMQ_RCVTIMEO, &timeout, sizeof (int)); assert (rc == 0); rc = zmq_connect (rep [peer], "tcp://localhost:5555"); assert (rc == 0); } // We have to give the connects time to finish otherwise the requests // will not properly round-robin. We could alternatively connect the // REQ sockets to the REP sockets. zmq_sleep(1); // Case 1: Second send() before a reply arrives in a pipe. // Send a request, ensure it arrives, don't send a reply s_send_seq (req, "A", "B", SEQ_END); s_recv_seq (rep [0], "A", "B", SEQ_END); // Send another request on the REQ socket s_send_seq (req, "C", "D", SEQ_END); s_recv_seq (rep [1], "C", "D", SEQ_END); // Send a reply to the first request - that should be discarded by the REQ s_send_seq (rep [0], "WRONG", SEQ_END); // Send the expected reply s_send_seq (rep [1], "OK", SEQ_END); s_recv_seq (req, "OK", SEQ_END); // Another standard req-rep cycle, just to check s_send_seq (req, "E", SEQ_END); s_recv_seq (rep [2], "E", SEQ_END); s_send_seq (rep [2], "F", "G", SEQ_END); s_recv_seq (req, "F", "G", SEQ_END); // Case 2: Second send() after a reply is already in a pipe on the REQ. // Send a request, ensure it arrives, send a reply s_send_seq (req, "H", SEQ_END); s_recv_seq (rep [3], "H", SEQ_END); s_send_seq (rep [3], "BAD", SEQ_END); // Wait for message to be there. rc = zmq_poll (0, 0, 100); assert (rc == 0); // Without receiving that reply, send another request on the REQ socket s_send_seq (req, "I", SEQ_END); s_recv_seq (rep [4], "I", SEQ_END); // Send the expected reply s_send_seq (rep [4], "GOOD", SEQ_END); s_recv_seq (req, "GOOD", SEQ_END); close_zero_linger (req); for (size_t peer = 0; peer < services; peer++) close_zero_linger (rep [peer]); // Wait for disconnects. rc = zmq_poll (0, 0, 100); assert (rc == 0); rc = zmq_ctx_term (ctx); assert (rc == 0); return 0 ; }