Exemplo n.º 1
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "reqrep_ipc test running...\n");

    void *ctx = xs_init ();
    assert (ctx);

    void *sb = xs_socket (ctx, XS_REP);
    assert (sb);
    int rc = xs_bind (sb, "ipc:///tmp/tester");
    assert (rc == 0);

    void *sc = xs_socket (ctx, XS_REQ);
    assert (sc);
    rc = xs_connect (sc, "ipc:///tmp/tester");
    assert (rc == 0);
    
    bounce (sb, sc);

    rc = xs_close (sc);
    assert (rc == 0);

    rc = xs_close (sb);
    assert (rc == 0);

    rc = xs_term (ctx);
    assert (rc == 0);

    return 0 ;
}
Exemplo n.º 2
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "pair_tcp test running...\n");

    void *ctx = xs_init ();
    assert (ctx);

    void *sb = xs_socket (ctx, XS_PAIR);
    assert (sb);
    int rc = xs_bind (sb, "tcp://127.0.0.1:5560");
    assert (rc == 0);

    void *sc = xs_socket (ctx, XS_PAIR);
    assert (sc);
    rc = xs_connect (sc, "tcp://127.0.0.1:5560");
    assert (rc == 0);
    
    bounce (sb, sc);

    rc = xs_close (sc);
    assert (rc == 0);

    rc = xs_close (sb);
    assert (rc == 0);

    rc = xs_term (ctx);
    assert (rc == 0);

    return 0 ;
}
Exemplo n.º 3
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "hwm test running...\n");

    void *ctx = xs_init ();
    assert (ctx);

    //  Create pair of socket, each with high watermark of 2. Thus the total
    //  buffer space should be 4 messages.
    void *sb = xs_socket (ctx, XS_PULL);
    assert (sb);
    int hwm = 2;
    int rc = xs_setsockopt (sb, XS_RCVHWM, &hwm, sizeof (hwm));
    assert (rc == 0);
    rc = xs_bind (sb, "inproc://a");
    assert (rc != -1);

    void *sc = xs_socket (ctx, XS_PUSH);
    assert (sc);
    rc = xs_setsockopt (sc, XS_SNDHWM, &hwm, sizeof (hwm));
    assert (rc == 0);
    rc = xs_connect (sc, "inproc://a");
    assert (rc != -1);

    //  Try to send 10 messages. Only 4 should succeed.
    for (int i = 0; i < 10; i++)
    {
        rc = xs_send (sc, NULL, 0, XS_DONTWAIT);
        if (i < 4)
            assert (rc == 0);
        else
            assert (rc < 0 && errno == EAGAIN);
    }

    // There should be now 4 messages pending, consume them.
    for (int i = 0; i != 4; i++) {
        rc = xs_recv (sb, NULL, 0, 0);
        assert (rc == 0);
    }

    // Now it should be possible to send one more.
    rc = xs_send (sc, NULL, 0, 0);
    assert (rc == 0);

    //  Consume the remaining message.
    rc = xs_recv (sb, NULL, 0, 0);
    assert (rc == 0);

    rc = xs_close (sc);
    assert (rc == 0);

    rc = xs_close (sb);
    assert (rc == 0);

    rc = xs_term (ctx);
    assert (rc == 0);

    return 0;
}
Exemplo n.º 4
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "msg_flags test running...\n");

    //  Create the infrastructure
    void *ctx = xs_init ();
    assert (ctx);
    void *sb = xs_socket (ctx, XS_XREP);
    assert (sb);
    int rc = xs_bind (sb, "inproc://a");
    assert (rc == 0);
    void *sc = xs_socket (ctx, XS_XREQ);
    assert (sc);
    rc = xs_connect (sc, "inproc://a");
    assert (rc == 0);
   
    //  Send 2-part message.
    rc = xs_send (sc, "A", 1, XS_SNDMORE);
    assert (rc == 1);
    rc = xs_send (sc, "B", 1, 0);
    assert (rc == 1);

    //  Identity comes first.
    xs_msg_t msg;
    rc = xs_msg_init (&msg);
    assert (rc == 0);
    rc = xs_recvmsg (sb, &msg, 0);
    assert (rc >= 0);
    int more;
    size_t more_size = sizeof (more);
    rc = xs_getmsgopt (&msg, XS_MORE, &more, &more_size);
    assert (rc == 0);
    assert (more == 1);

    //  Then the first part of the message body.
    rc = xs_recvmsg (sb, &msg, 0);
    assert (rc == 1);
    more_size = sizeof (more);
    rc = xs_getmsgopt (&msg, XS_MORE, &more, &more_size);
    assert (rc == 0);
    assert (more == 1);

    //  And finally, the second part of the message body.
    rc = xs_recvmsg (sb, &msg, 0);
    assert (rc == 1);
    more_size = sizeof (more);
    rc = xs_getmsgopt (&msg, XS_MORE, &more, &more_size);
    assert (rc == 0);
    assert (more == 0);

    //  Deallocate the infrastructure.
    rc = xs_close (sc);
    assert (rc == 0);
    rc = xs_close (sb);
    assert (rc == 0);
    rc = xs_term (ctx);
    assert (rc == 0);
    return 0 ;
}
Exemplo n.º 5
0
static void *worker (void *ctx_)
#endif
{
    void *s;
    int rc;
    int i;
    xs_msg_t msg;

    s = xs_socket (ctx_, XS_REP);
    if (!s) {
        printf ("error in xs_socket: %s\n", xs_strerror (errno));
        exit (1);
    }

    rc = xs_connect (s, "inproc://lat_test");
    if (rc == -1) {
        printf ("error in xs_connect: %s\n", xs_strerror (errno));
        exit (1);
    }

    rc = xs_msg_init (&msg);
    if (rc != 0) {
        printf ("error in xs_msg_init: %s\n", xs_strerror (errno));
        exit (1);
    }

    for (i = 0; i != roundtrip_count; i++) {
        rc = xs_recvmsg (s, &msg, 0);
        if (rc < 0) {
            printf ("error in xs_recvmsg: %s\n", xs_strerror (errno));
            exit (1);
        }
        rc = xs_sendmsg (s, &msg, 0);
        if (rc < 0) {
            printf ("error in xs_sendmsg: %s\n", xs_strerror (errno));
            exit (1);
        }
    }

    rc = xs_msg_close (&msg);
    if (rc != 0) {
        printf ("error in xs_msg_close: %s\n", xs_strerror (errno));
        exit (1);
    }

    rc = xs_close (s);
    if (rc != 0) {
        printf ("error in xs_close: %s\n", xs_strerror (errno));
        exit (1);
    }

#if defined XS_HAVE_WINDOWS
    return 0;
#else
    return NULL;
#endif
}
Exemplo n.º 6
0
static void *worker (void *ctx_)
#endif
{
    void *s;
    int rc;
    int i;
    xs_msg_t msg;

    s = xs_socket (ctx_, XS_PUSH);
    if (!s) {
        printf ("error in xs_socket: %s\n", xs_strerror (errno));
        exit (1);
    }

    rc = xs_connect (s, "inproc://thr_test");
    if (rc == -1) {
        printf ("error in xs_connect: %s\n", xs_strerror (errno));
        exit (1);
    }

    for (i = 0; i != message_count; i++) {

        rc = xs_msg_init_size (&msg, message_size);
        if (rc != 0) {
            printf ("error in xs_msg_init_size: %s\n", xs_strerror (errno));
            exit (1);
        }
#if defined XS_MAKE_VALGRIND_HAPPY
        memset (xs_msg_data (&msg), 0, message_size);
#endif

        rc = xs_sendmsg (s, &msg, 0);
        if (rc < 0) {
            printf ("error in xs_sendmsg: %s\n", xs_strerror (errno));
            exit (1);
        }
        rc = xs_msg_close (&msg);
        if (rc != 0) {
            printf ("error in xs_msg_close: %s\n", xs_strerror (errno));
            exit (1);
        }
    }

    rc = xs_close (s);
    if (rc != 0) {
        printf ("error in xs_close: %s\n", xs_strerror (errno));
        exit (1);
    }

#if defined XS_HAVE_WINDOWS
    return 0;
#else
    return NULL;
#endif
}
Exemplo n.º 7
0
    static void shutdown_stress_worker (void *s_)
    {
        int rc;

        rc = xs_connect (s_, "tcp://127.0.0.1:5560");
        assert (rc == 0);

        //  Start closing the socket while the connecting process is underway.
        rc = xs_close (s_);
        assert (rc == 0);
    }
Exemplo n.º 8
0
 void polltimeo_worker(void *ctx_)
 {
     //  Worker thread connects after delay of 1 second. Then it waits
     //  for 1 more second, so that async connect has time to succeed.
     sleep (1);
     void *sc = xs_socket (ctx_, XS_PUSH);
     assert (sc);
     int rc = xs_connect (sc, "inproc://timeout_test");
     assert (rc == 0);
     sleep (1);
     rc = xs_close (sc);
     assert (rc == 0);
 }
Exemplo n.º 9
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "linger test running...\n");

    //  Create socket.
    void *ctx = xs_init ();
    assert (ctx);
    void *s = xs_socket (ctx, XS_PUSH);
    assert (s);

    //  Set linger to 0.1 second.
    int linger = 100;
    int rc = xs_setsockopt (s, XS_LINGER, &linger, sizeof (int));

    //  Connect to non-existent endpoing.
    assert (rc == 0);
    rc = xs_connect (s, "tcp://127.0.0.1:5560");
    assert (rc == 0);

    //  Send a message.
    rc = xs_send (s, "r", 1, 0);
    assert (rc == 1);

    //  Close the socket.
    rc = xs_close (s);
    assert (rc == 0);

    //  Terminate the context. This should take 0.1 second.
    void *watch = xs_stopwatch_start ();
    rc = xs_term (ctx);
    assert (rc == 0);
    int ms = (int) xs_stopwatch_stop (watch) / 1000;
#if !defined _WIN32 || !defined _DEBUG
    assert (ms > 50 && ms < 150);
#endif

    return 0;
}
Exemplo n.º 10
0
int zmq_connect (void *s, const char *addr)
{
    int rc = xs_connect (s, addr);
    return rc < 0 ? -1 : 0;
}
Exemplo n.º 11
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "sub_forward test running...\n");

    void *ctx = xs_init ();
    assert (ctx);

    //  First, create an intermediate device.
    void *xpub = xs_socket (ctx, XS_XPUB);
    assert (xpub);
    int rc = xs_bind (xpub, "tcp://127.0.0.1:5560");
    assert (rc == 0);
    void *xsub = xs_socket (ctx, XS_XSUB);
    assert (xsub);
    rc = xs_bind (xsub, "tcp://127.0.0.1:5561");
    assert (rc == 0);

    //  Create a publisher.
    void *pub = xs_socket (ctx, XS_PUB);
    assert (pub);
    rc = xs_connect (pub, "tcp://127.0.0.1:5561");
    assert (rc == 0);

    //  Create a subscriber.
    void *sub = xs_socket (ctx, XS_SUB);
    assert (sub);
    rc = xs_connect (sub, "tcp://127.0.0.1:5560");
    assert (rc == 0);

    //  Subscribe for all messages.
    rc = xs_setsockopt (sub, XS_SUBSCRIBE, "", 0);
    assert (rc == 0);

    //  Pass the subscription upstream through the device.
    char buff [32];
    rc = xs_recv (xpub, buff, sizeof (buff), 0);
    assert (rc >= 0);
    rc = xs_send (xsub, buff, rc, 0);
    assert (rc >= 0);

    //  Wait a bit till the subscription gets to the publisher.
    sleep (1);

    //  Send an empty message.
    rc = xs_send (pub, NULL, 0, 0);
    assert (rc == 0);

    //  Pass the message downstream through the device.
    rc = xs_recv (xsub, buff, sizeof (buff), 0);
    assert (rc >= 0);
    rc = xs_send (xpub, buff, rc, 0);
    assert (rc >= 0);

    //  Receive the message in the subscriber.
    rc = xs_recv (sub, buff, sizeof (buff), 0);
    assert (rc == 0);

    //  Clean up.
    rc = xs_close (xpub);
    assert (rc == 0);
    rc = xs_close (xsub);
    assert (rc == 0);
    rc = xs_close (pub);
    assert (rc == 0);
    rc = xs_close (sub);
    assert (rc == 0);
    rc = xs_term (ctx);
    assert (rc == 0);

    return 0 ;
}
Exemplo n.º 12
0
int XS_TEST_MAIN ()
{
    fprintf (stderr, "reqrep_device test running...\n");

    void *ctx = xs_init ();
    errno_assert (ctx);

    //  Create a req/rep device.
    void *xreq = xs_socket (ctx, XS_XREQ);
    errno_assert (xreq);
    int rc = xs_bind (xreq, "tcp://127.0.0.1:5560");
    errno_assert (rc != -1);
    void *xrep = xs_socket (ctx, XS_XREP);
    errno_assert (xrep);
    rc = xs_bind (xrep, "tcp://127.0.0.1:5561");
    errno_assert (rc != -1);

    //  Create a worker.
    void *rep = xs_socket (ctx, XS_REP);
    errno_assert (rep);
    rc = xs_connect (rep, "tcp://127.0.0.1:5560");
    errno_assert (rc != -1);

    //  Create a client.
    void *req = xs_socket (ctx, XS_REQ);
    errno_assert (req);
    rc = xs_connect (req, "tcp://127.0.0.1:5561");
    errno_assert (rc != -1);

    //  Send a request.
    rc = xs_send (req, "ABC", 3, XS_SNDMORE);
    errno_assert (rc == 3);
    rc = xs_send (req, "DEF", 3, 0);
    errno_assert (rc == 3);

    //  Pass the request through the device.
    for (int i = 0; i != 4; i++) {
        xs_msg_t msg;
        rc = xs_msg_init (&msg);
        errno_assert (rc == 0);
        rc = xs_recvmsg (xrep, &msg, 0);
        errno_assert (rc >= 0);
        int rcvmore;
        size_t sz = sizeof (rcvmore);
        rc = xs_getsockopt (xrep, XS_RCVMORE, &rcvmore, &sz);
        errno_assert (rc == 0);
        rc = xs_sendmsg (xreq, &msg, rcvmore ? XS_SNDMORE : 0);
        errno_assert (rc >= 0);
    }

    //  Receive the request.
    char buff [3];
    rc = xs_recv (rep, buff, 3, 0);
    errno_assert (rc == 3);
    assert (memcmp (buff, "ABC", 3) == 0);
    int rcvmore;
    size_t sz = sizeof (rcvmore);
    rc = xs_getsockopt (rep, XS_RCVMORE, &rcvmore, &sz);
    errno_assert (rc == 0);
    assert (rcvmore);
    rc = xs_recv (rep, buff, 3, 0);
    errno_assert (rc == 3);
    assert (memcmp (buff, "DEF", 3) == 0);
    rc = xs_getsockopt (rep, XS_RCVMORE, &rcvmore, &sz);
    errno_assert (rc == 0);
    assert (!rcvmore);

    //  Send the reply.
    rc = xs_send (rep, "GHI", 3, XS_SNDMORE);
    errno_assert (rc == 3);
    rc = xs_send (rep, "JKL", 3, 0);
    errno_assert (rc == 3);

    //  Pass the reply through the device.
    for (int i = 0; i != 4; i++) {
        xs_msg_t msg;
        rc = xs_msg_init (&msg);
        errno_assert (rc == 0);
        rc = xs_recvmsg (xreq, &msg, 0);
        errno_assert (rc >= 0);
        rc = xs_getsockopt (xreq, XS_RCVMORE, &rcvmore, &sz);
        errno_assert (rc == 0);
        rc = xs_sendmsg (xrep, &msg, rcvmore ? XS_SNDMORE : 0);
        errno_assert (rc >= 0);
    }

    //  Receive the reply.
    rc = xs_recv (req, buff, 3, 0);
    errno_assert (rc == 3);
    assert (memcmp (buff, "GHI", 3) == 0);
    rc = xs_getsockopt (req, XS_RCVMORE, &rcvmore, &sz);
    errno_assert (rc == 0);
    assert (rcvmore);
    rc = xs_recv (req, buff, 3, 0);
    errno_assert (rc == 3);
    assert (memcmp (buff, "JKL", 3) == 0);
    rc = xs_getsockopt (req, XS_RCVMORE, &rcvmore, &sz);
    errno_assert (rc == 0);
    assert (!rcvmore);

    //  Clean up.
    rc = xs_close (req);
    errno_assert (rc == 0);
    rc = xs_close (rep);
    errno_assert (rc == 0);
    rc = xs_close (xrep);
    errno_assert (rc == 0);
    rc = xs_close (xreq);
    errno_assert (rc == 0);
    rc = xs_term (ctx);
    errno_assert (rc == 0);

    return 0 ;
}
Exemplo n.º 13
0
int XS_TEST_MAIN ()
{
    int rc;
    char buf [32];

    fprintf (stderr, "survey test running...\n");

    //  Create the basic infrastructure.
    void *ctx = xs_init ();
    assert (ctx);
    void *xsurveyor = xs_socket (ctx, XS_XSURVEYOR);
    assert (xsurveyor);
    rc = xs_bind (xsurveyor, "inproc://a");
    assert (rc != -1);
    void *xrespondent = xs_socket (ctx, XS_XRESPONDENT);
    assert (xrespondent);
    rc = xs_bind (xrespondent, "inproc://b");
    assert (rc != -1);
    void *surveyor = xs_socket (ctx, XS_SURVEYOR);
    assert (surveyor);
    rc = xs_connect (surveyor, "inproc://b");
    assert (rc != -1);
    void *respondent1 = xs_socket (ctx, XS_RESPONDENT);
    assert (respondent1);
    rc = xs_connect (respondent1, "inproc://a");
    assert (rc != -1);
    void *respondent2 = xs_socket (ctx, XS_RESPONDENT);
    assert (respondent2);
    rc = xs_connect (respondent2, "inproc://a");
    assert (rc != -1);

    //  Send the survey.
    rc = xs_send (surveyor, "ABC", 3, 0);
    assert (rc == 3);

    //  Forward the survey through the intermediate device.
    //  Survey consist of identity (4 bytes), survey ID (4 bytes) and the body.
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xsurveyor, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xsurveyor, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 3);
    rc = xs_send (xsurveyor, buf, 3, 0);
    assert (rc == 3);

    //  Respondent 1 responds to the survey.
    rc = xs_recv (respondent1, buf, sizeof (buf), 0);
    assert (rc == 3);
    rc = xs_send (respondent1, "DE", 2, 0);
    assert (rc == 2);

    //  Forward the response through the intermediate device.
    rc = xs_recv (xsurveyor, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xsurveyor, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xsurveyor, buf, sizeof (buf), 0);
    assert (rc == 2);
    rc = xs_send (xrespondent, buf, 2, 0);
    assert (rc == 2);

    //  Surveyor gets the response.
    rc = xs_recv (surveyor, buf, sizeof (buf), 0);
    assert (rc == 2);

    //  Respondent 2 responds to the survey.
    rc = xs_recv (respondent2, buf, sizeof (buf), 0);
    assert (rc == 3);
    rc = xs_send (respondent2, "FGHI", 4, 0);
    assert (rc == 4);

    //  Forward the response through the intermediate device.
    rc = xs_recv (xsurveyor, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xsurveyor, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xsurveyor, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, 0);
    assert (rc == 4);

    //  Surveyor gets the response.
    rc = xs_recv (surveyor, buf, sizeof (buf), 0);
    assert (rc == 4);

    //  Now let's test whether survey timeout works as expected.
    int timeout = 100;
    rc = xs_setsockopt (surveyor, XS_SURVEY_TIMEOUT, &timeout, sizeof (int));
    assert (rc == 0);
    rc = xs_send (surveyor, "ABC", 3, 0);
    assert (rc == 3);
    void *watch = xs_stopwatch_start ();
    rc = xs_recv (surveyor, buf, sizeof (buf), 0);
    assert (rc == - 1 && errno == EAGAIN);
    unsigned long elapsed = xs_stopwatch_stop (watch) / 1000;
    time_assert (elapsed, (unsigned long) timeout);

    //  Test whether responses for old surveys are discarded. First,
    //  initiate new survey.
    rc = xs_setsockopt (surveyor, XS_SURVEY_TIMEOUT, &timeout, sizeof (int));
    assert (rc == 0);
    rc = xs_send (surveyor, "DE", 2, 0);
    assert (rc == 2);

    //  Read, process and reply to the old survey.
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 3);
    rc = xs_send (xrespondent, buf, 3, 0);
    assert (rc == 3);

    //  Read, process and reply to the new survey.
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 4);
    rc = xs_send (xrespondent, buf, 4, XS_SNDMORE);
    assert (rc == 4);
    rc = xs_recv (xrespondent, buf, sizeof (buf), 0);
    assert (rc == 2);
    rc = xs_send (xrespondent, buf, 2, 0);
    assert (rc == 2);

    //  Get the response and check it's the response to the new survey and
    //  that response to the old survey was silently discarded.
    rc = xs_recv (surveyor, buf, sizeof (buf), 0);
    assert (rc == 2);

    rc = xs_close (respondent2);
    assert (rc == 0);
    rc = xs_close (respondent1);
    assert (rc == 0);
    rc = xs_close (surveyor);
    assert (rc == 0);
    rc = xs_close (xrespondent);
    assert (rc == 0);
    rc = xs_close (xsurveyor);
    assert (rc == 0);
    rc = xs_term (ctx);
    assert (rc == 0);
    
    return 0 ;
}
Exemplo n.º 14
0
int main (int argc, char *argv [])
{
    const char *connect_to;
    int roundtrip_count;
    size_t message_size;
    void *ctx;
    void *s;
    int rc;
    int i;
    xs_msg_t msg;
    void *watch;
    unsigned long elapsed;
    double latency;

    if (argc != 4) {
        printf ("usage: remote_lat <connect-to> <message-size> "
            "<roundtrip-count>\n");
        return 1;
    }
    connect_to = argv [1];
    message_size = atoi (argv [2]);
    roundtrip_count = atoi (argv [3]);

    ctx = xs_init ();
    if (!ctx) {
        printf ("error in xs_init: %s\n", xs_strerror (errno));
        return -1;
    }

    s = xs_socket (ctx, XS_REQ);
    if (!s) {
        printf ("error in xs_socket: %s\n", xs_strerror (errno));
        return -1;
    }

    rc = xs_connect (s, connect_to);
    if (rc == -1) {
        printf ("error in xs_connect: %s\n", xs_strerror (errno));
        return -1;
    }

    rc = xs_msg_init_size (&msg, message_size);
    if (rc != 0) {
        printf ("error in xs_msg_init_size: %s\n", xs_strerror (errno));
        return -1;
    }
    memset (xs_msg_data (&msg), 0, message_size);

    watch = xs_stopwatch_start ();

    for (i = 0; i != roundtrip_count; i++) {
        rc = xs_sendmsg (s, &msg, 0);
        if (rc < 0) {
            printf ("error in xs_sendmsg: %s\n", xs_strerror (errno));
            return -1;
        }
        rc = xs_recvmsg (s, &msg, 0);
        if (rc < 0) {
            printf ("error in xs_recvmsg: %s\n", xs_strerror (errno));
            return -1;
        }
        if (xs_msg_size (&msg) != message_size) {
            printf ("message of incorrect size received\n");
            return -1;
        }
    }

    elapsed = xs_stopwatch_stop (watch);

    rc = xs_msg_close (&msg);
    if (rc != 0) {
        printf ("error in xs_msg_close: %s\n", xs_strerror (errno));
        return -1;
    }

    latency = (double) elapsed / (roundtrip_count * 2);

    printf ("message size: %d [B]\n", (int) message_size);
    printf ("roundtrip count: %d\n", (int) roundtrip_count);
    printf ("average latency: %.3f [us]\n", (double) latency);

    rc = xs_close (s);
    if (rc != 0) {
        printf ("error in xs_close: %s\n", xs_strerror (errno));
        return -1;
    }

    rc = xs_term (ctx);
    if (rc != 0) {
        printf ("error in xs_term: %s\n", xs_strerror (errno));
        return -1;
    }

    return 0;
}