libzmq/tests/test_pub_invert_matching.cpp

/*
    Copyright (c) 2007-2014 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 <http://www.gnu.org/licenses/>.
*/

#include "testutil.hpp"

int main (void)
{
    setup_test_environment();
    void *ctx = zmq_ctx_new ();
    assert (ctx);

    //  Create a publisher
    void *pub = zmq_socket (ctx, ZMQ_PUB);
    assert (pub);
    int rc = zmq_bind (pub, "inproc://soname");
    assert (rc == 0);

    //  Create two subscribers
    void *sub1 = zmq_socket (ctx, ZMQ_SUB);
    assert (sub1);
    rc = zmq_connect (sub1, "inproc://soname");
    assert (rc == 0);

    void *sub2 = zmq_socket (ctx, ZMQ_SUB);
    assert (sub2);
    rc = zmq_connect (sub2, "inproc://soname");
    assert (rc == 0);

    //  Subscribe pub1 to one prefix
    //  and pub2 to another prefix.
    const char PREFIX1[] = "prefix1";
    const char PREFIX2[] = "p2";

    rc = zmq_setsockopt (sub1, ZMQ_SUBSCRIBE, PREFIX1, sizeof(PREFIX1));
    assert (rc == 0);

    rc = zmq_setsockopt (sub2, ZMQ_SUBSCRIBE, PREFIX2, sizeof(PREFIX2));
    assert (rc == 0);

    //  Send a message with the first prefix
    rc = zmq_send_const(pub, PREFIX1, sizeof(PREFIX1), 0);
    assert (rc == sizeof(PREFIX1));

    //  sub1 should receive it, but not sub2
    rc = zmq_recv (sub1, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == sizeof(PREFIX1));

    rc = zmq_recv (sub2, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == -1);
    assert (errno == EAGAIN);

    //  Send a message with the second prefix
    rc = zmq_send_const(pub, PREFIX2, sizeof(PREFIX2), 0);
    assert (rc == sizeof(PREFIX2));

    //  sub2 should receive it, but not sub1
    rc = zmq_recv (sub2, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == sizeof(PREFIX2));

    rc = zmq_recv (sub1, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == -1);
    assert (errno == EAGAIN);

    //  Now invert the matching
    int invert = 1;
    rc = zmq_setsockopt (pub, ZMQ_INVERT_MATCHING, &invert, sizeof(invert));
    assert (rc == 0);

    //  ... on both sides, otherwise the SUB socket will filter the messages out
    rc = zmq_setsockopt (sub1, ZMQ_INVERT_MATCHING, &invert, sizeof(invert));
    rc = zmq_setsockopt (sub2, ZMQ_INVERT_MATCHING, &invert, sizeof(invert));
    assert (rc == 0);

    //  Send a message with the first prefix
    rc = zmq_send_const(pub, PREFIX1, sizeof(PREFIX1), 0);
    assert (rc == sizeof(PREFIX1));

    //  sub2 should receive it, but not sub1
    rc = zmq_recv (sub2, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == sizeof(PREFIX1));

    rc = zmq_recv (sub1, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == -1);
    assert (errno == EAGAIN);

    //  Send a message with the second prefix
    rc = zmq_send_const(pub, PREFIX2, sizeof(PREFIX2), 0);
    assert (rc == sizeof(PREFIX2));

    //  sub1 should receive it, but not sub2
    rc = zmq_recv (sub1, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == sizeof(PREFIX2));

    rc = zmq_recv (sub2, NULL, 0, ZMQ_DONTWAIT);
    assert (rc == -1);
    assert (errno == EAGAIN);


    //  Clean up.
    rc = zmq_close (pub);
    assert (rc == 0);
    rc = zmq_close (sub1);
    assert (rc == 0);
    rc = zmq_close (sub2);
    assert (rc == 0);
    rc = zmq_ctx_term (ctx);
    assert (rc == 0);

    return 0 ;
}