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https://github.com/zeromq/libzmq.git
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6ced7027a0
Symptom is that ZMQ_STREAM sockets in 4.1.0 and 4.1.1 generate zero sized messages on each new connection, unlike 4.0.x which did not do this. Person who made this commit also changed test cases so that contract breakage did not show. Same person was later banned for persistently poor form in CZMQ contributions. Solution: enable connect notifications on ZMQ_STREAM sockets using a new ZMQ_STREAM_NOTIFY setting. By default, socket does not deliver notifications, and behaves as in 4.0.x. Fixes #1316
264 lines
8.6 KiB
C++
264 lines
8.6 KiB
C++
/*
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Copyright (c) 2007-2013 Contributors as noted in the AUTHORS file
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This file is part of 0MQ.
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0MQ 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 as published by
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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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0MQ is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public 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 const int SERVER = 0;
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static const int CLIENT = 1;
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struct test_message_t {
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int turn;
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const char * text;
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};
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// NOTE: messages are sent without null terminator.
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const test_message_t dialog [] = {
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{CLIENT, "i can haz cheez burger?"},
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{SERVER, "y u no disonnect?"},
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{CLIENT, ""},
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};
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const int steps = sizeof(dialog) / sizeof(dialog[0]);
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bool has_more (void* socket)
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{
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int more = 0;
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size_t more_size = sizeof(more);
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int rc = zmq_getsockopt (socket, ZMQ_RCVMORE, &more, &more_size);
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if (rc != 0)
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return false;
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return more != 0;
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}
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bool get_identity (void* socket, char* data, size_t* size)
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{
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int rc = zmq_getsockopt (socket, ZMQ_IDENTITY, data, size);
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return rc == 0;
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}
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int main(int, char**)
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{
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setup_test_environment();
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void *context = zmq_ctx_new ();
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void *sockets [2];
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int rc = 0;
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sockets [SERVER] = zmq_socket (context, ZMQ_STREAM);
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int enabled = 1;
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rc = zmq_setsockopt (sockets [SERVER], ZMQ_STREAM_NOTIFY, &enabled, sizeof (enabled));
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assert (rc == 0);
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rc = zmq_bind (sockets [SERVER], "tcp://0.0.0.0:6666");
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assert (rc == 0);
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sockets [CLIENT] = zmq_socket (context, ZMQ_STREAM);
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rc = zmq_setsockopt (sockets [CLIENT], ZMQ_STREAM_NOTIFY, &enabled, sizeof (enabled));
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assert (rc == 0);
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rc = zmq_connect (sockets [CLIENT], "tcp://localhost:6666");
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assert (rc == 0);
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// wait for connect notification
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// Server: Grab the 1st frame (peer identity).
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zmq_msg_t peer_frame;
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rc = zmq_msg_init (&peer_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&peer_frame, sockets [SERVER], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&peer_frame) > 0);
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assert (has_more (sockets [SERVER]));
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// Server: Grab the 2nd frame (actual payload).
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zmq_msg_t data_frame;
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rc = zmq_msg_init (&data_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&data_frame, sockets [SERVER], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&data_frame) == 0);
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// Client: Grab the 1st frame (peer identity).
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rc = zmq_msg_init (&peer_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&peer_frame, sockets [CLIENT], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&peer_frame) > 0);
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assert (has_more (sockets [CLIENT]));
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// Client: Grab the 2nd frame (actual payload).
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rc = zmq_msg_init (&data_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&data_frame, sockets [CLIENT], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&data_frame) == 0);
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// Send initial message.
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char blob_data [256];
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size_t blob_size = sizeof(blob_data);
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rc = zmq_getsockopt (sockets [CLIENT], ZMQ_IDENTITY, blob_data, &blob_size);
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assert (rc != -1);
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assert(blob_size > 0);
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zmq_msg_t msg;
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rc = zmq_msg_init_size (&msg, blob_size);
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assert (rc == 0);
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memcpy (zmq_msg_data (&msg), blob_data, blob_size);
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rc = zmq_msg_send (&msg, sockets [dialog [0].turn], ZMQ_SNDMORE);
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assert (rc != -1);
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rc = zmq_msg_close (&msg);
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assert (rc == 0);
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rc = zmq_msg_init_size (&msg, strlen(dialog [0].text));
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assert (rc == 0);
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memcpy (zmq_msg_data (&msg), dialog [0].text, strlen(dialog [0].text));
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rc = zmq_msg_send (&msg, sockets [dialog [0].turn], ZMQ_SNDMORE);
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assert (rc != -1);
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rc = zmq_msg_close (&msg);
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assert (rc == 0);
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// TODO: make sure this loop doesn't loop forever if something is wrong
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// with the test (or the implementation).
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int step = 0;
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while (step < steps) {
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// Wait until something happens.
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zmq_pollitem_t items [] = {
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{ sockets [SERVER], 0, ZMQ_POLLIN, 0 },
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{ sockets [CLIENT], 0, ZMQ_POLLIN, 0 },
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};
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int rc = zmq_poll (items, 2, 100);
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assert (rc >= 0);
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// Check for data received by the server.
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if (items [SERVER].revents & ZMQ_POLLIN) {
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assert (dialog [step].turn == CLIENT);
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// Grab the 1st frame (peer identity).
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zmq_msg_t peer_frame;
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rc = zmq_msg_init (&peer_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&peer_frame, sockets [SERVER], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&peer_frame) > 0);
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assert (has_more (sockets [SERVER]));
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// Grab the 2nd frame (actual payload).
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zmq_msg_t data_frame;
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rc = zmq_msg_init (&data_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&data_frame, sockets [SERVER], 0);
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assert (rc != -1);
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// Make sure payload matches what we expect.
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const char * const data = (const char*)zmq_msg_data (&data_frame);
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const int size = zmq_msg_size (&data_frame);
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// 0-length frame is a disconnection notification. The server
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// should receive it as the last step in the dialogue.
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if (size == 0) {
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++step;
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assert (step == steps);
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}
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else {
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assert ((size_t) size == strlen (dialog [step].text));
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int cmp = memcmp (dialog [step].text, data, size);
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assert (cmp == 0);
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++step;
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assert (step < steps);
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// Prepare the response.
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rc = zmq_msg_close (&data_frame);
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assert (rc == 0);
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rc = zmq_msg_init_size (&data_frame,
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strlen (dialog [step].text));
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assert (rc == 0);
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memcpy (zmq_msg_data (&data_frame), dialog [step].text,
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zmq_msg_size (&data_frame));
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// Send the response.
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rc = zmq_msg_send (&peer_frame, sockets [SERVER], ZMQ_SNDMORE);
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assert (rc != -1);
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rc = zmq_msg_send (&data_frame, sockets [SERVER], ZMQ_SNDMORE);
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assert (rc != -1);
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}
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// Release resources.
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rc = zmq_msg_close (&peer_frame);
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assert (rc == 0);
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rc = zmq_msg_close (&data_frame);
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assert (rc == 0);
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}
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// Check for data received by the client.
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if (items [CLIENT].revents & ZMQ_POLLIN) {
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assert (dialog [step].turn == SERVER);
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// Grab the 1st frame (peer identity).
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zmq_msg_t peer_frame;
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rc = zmq_msg_init (&peer_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&peer_frame, sockets [CLIENT], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&peer_frame) > 0);
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assert (has_more (sockets [CLIENT]));
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// Grab the 2nd frame (actual payload).
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zmq_msg_t data_frame;
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rc = zmq_msg_init (&data_frame);
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assert (rc == 0);
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rc = zmq_msg_recv (&data_frame, sockets [CLIENT], 0);
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assert (rc != -1);
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assert(zmq_msg_size (&data_frame) > 0);
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// Make sure payload matches what we expect.
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const char * const data = (const char*)zmq_msg_data (&data_frame);
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const int size = zmq_msg_size (&data_frame);
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assert ((size_t)size == strlen(dialog [step].text));
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int cmp = memcmp(dialog [step].text, data, size);
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assert (cmp == 0);
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++step;
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// Prepare the response (next line in the dialog).
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assert (step < steps);
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rc = zmq_msg_close (&data_frame);
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assert (rc == 0);
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rc = zmq_msg_init_size (&data_frame, strlen (dialog [step].text));
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assert (rc == 0);
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memcpy (zmq_msg_data (&data_frame), dialog [step].text, zmq_msg_size (&data_frame));
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// Send the response.
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rc = zmq_msg_send (&peer_frame, sockets [CLIENT], ZMQ_SNDMORE);
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assert (rc != -1);
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rc = zmq_msg_send (&data_frame, sockets [CLIENT], ZMQ_SNDMORE);
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assert (rc != -1);
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// Release resources.
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rc = zmq_msg_close (&peer_frame);
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assert (rc == 0);
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rc = zmq_msg_close (&data_frame);
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assert (rc == 0);
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}
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}
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assert (step == steps);
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rc = zmq_close (sockets [CLIENT]);
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assert (rc == 0);
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rc = zmq_close (sockets [SERVER]);
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assert (rc == 0);
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rc = zmq_ctx_term (context);
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assert (rc == 0);
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return 0;
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}
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