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/*
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 <http://www.gnu.org/licenses/>.
*/
#include "testutil.hpp"
int main (void)
{
setup_test_environment();
int val;
int rc;
char buffer[16];
// TEST 1.
// First we're going to attempt to send messages to two
// pipes, one connected, the other not. We should see
// the PUSH load balancing to both pipes, and hence half
// of the messages getting queued, as connect() creates a
// pipe immediately.
void *context = zmq_ctx_new();
assert (context);
void *to = zmq_socket(context, ZMQ_PULL);
assert (to);
// Bind the one valid receiver
val = 0;
rc = zmq_setsockopt(to, ZMQ_LINGER, &val, sizeof(val));
assert (rc == 0);
rc = zmq_bind (to, "tcp://127.0.0.1:6555");
assert (rc == 0);
// Create a socket pushing to two endpoints - only 1 message should arrive.
void *from = zmq_socket (context, ZMQ_PUSH);
assert(from);
val = 0;
zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof (val));
// This pipe will not connect
rc = zmq_connect (from, "tcp://localhost:5556");
assert (rc == 0);
// This pipe will
rc = zmq_connect (from, "tcp://localhost:6555");
assert (rc == 0);
// We send 10 messages, 5 should just get stuck in the queue
// for the not-yet-connected pipe
for (int i = 0; i < 10; ++i) {
rc = zmq_send (from, "Hello", 5, 0);
assert (rc == 5);
}
// We now consume from the connected pipe
// - we should see just 5
int timeout = 100;
rc = zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int));
assert (rc == 0);
int seen = 0;
while (true) {
rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
if (rc == -1)
break; // Break when we didn't get a message
seen++;
}
assert (seen == 5);
rc = zmq_close (from);
assert (rc == 0);
rc = zmq_close (to);
assert (rc == 0);
rc = zmq_ctx_term (context);
assert (rc == 0);
// TEST 2
// This time we will do the same thing, connect two pipes,
// one of which will succeed in connecting to a bound
// receiver, the other of which will fail. However, we will
// also set the delay attach on connect flag, which should
// cause the pipe attachment to be delayed until the connection
// succeeds.
context = zmq_ctx_new();
// Bind the valid socket
to = zmq_socket (context, ZMQ_PULL);
assert (to);
rc = zmq_bind (to, "tcp://127.0.0.1:5560");
assert (rc == 0);
val = 0;
rc = zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof(val));
assert (rc == 0);
// Create a socket pushing to two endpoints - all messages should arrive.
from = zmq_socket (context, ZMQ_PUSH);
assert (from);
val = 0;
rc = zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof(val));
assert (rc == 0);
// Set the key flag
val = 1;
rc = zmq_setsockopt (from, ZMQ_IMMEDIATE, &val, sizeof(val));
assert (rc == 0);
// Connect to the invalid socket
rc = zmq_connect (from, "tcp://localhost:5561");
assert (rc == 0);
// Connect to the valid socket
rc = zmq_connect (from, "tcp://localhost:5560");
assert (rc == 0);
// Send 10 messages, all should be routed to the connected pipe
for (int i = 0; i < 10; ++i) {
rc = zmq_send (from, "Hello", 5, 0);
assert (rc == 5);
}
rc = zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int));
assert (rc == 0);
seen = 0;
while (true) {
rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
if (rc == -1)
break; // Break when we didn't get a message
seen++;
}
assert (seen == 10);
rc = zmq_close (from);
assert (rc == 0);
rc = zmq_close (to);
assert (rc == 0);
rc = zmq_ctx_term (context);
assert (rc == 0);
// TEST 3
// This time we want to validate that the same blocking behaviour
// occurs with an existing connection that is broken. We will send
// messages to a connected pipe, disconnect and verify the messages
// block. Then we reconnect and verify messages flow again.
context = zmq_ctx_new ();
void *backend = zmq_socket (context, ZMQ_DEALER);
assert (backend);
void *frontend = zmq_socket (context, ZMQ_DEALER);
assert (frontend);
int zero = 0;
rc = zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);
rc = zmq_setsockopt (frontend, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);
// Frontend connects to backend using IMMEDIATE
int on = 1;
rc = zmq_setsockopt (frontend, ZMQ_IMMEDIATE, &on, sizeof (on));
assert (rc == 0);
rc = zmq_bind (backend, "tcp://127.0.0.1:5560");
assert (rc == 0);
rc = zmq_connect (frontend, "tcp://localhost:5560");
assert (rc == 0);
// Ping backend to frontend so we know when the connection is up
rc = zmq_send (backend, "Hello", 5, 0);
assert (rc == 5);
rc = zmq_recv (frontend, buffer, 255, 0);
assert (rc == 5);
// Send message from frontend to backend
rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
assert (rc == 5);
rc = zmq_close (backend);
assert (rc == 0);
// Give time to process disconnect
msleep (SETTLE_TIME);
// Send a message, should fail
rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
assert (rc == -1);
// Recreate backend socket
backend = zmq_socket (context, ZMQ_DEALER);
assert (backend);
rc = zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);
rc = zmq_bind (backend, "tcp://127.0.0.1:5560");
assert (rc == 0);
// Ping backend to frontend so we know when the connection is up
rc = zmq_send (backend, "Hello", 5, 0);
assert (rc == 5);
rc = zmq_recv (frontend, buffer, 255, 0);
assert (rc == 5);
// After the reconnect, should succeed
rc = zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT);
assert (rc == 5);
rc = zmq_close (backend);
assert (rc == 0);
rc = zmq_close (frontend);
assert (rc == 0);
rc = zmq_ctx_term (context);
assert (rc == 0);
}
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