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https://github.com/zeromq/libzmq.git
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b9646f2aac
* Documentation: The default behavior of REQ sockets is to rely on the ordering of messages to match requests and responses and that is usually sufficient. When this option is set to 1, the REQ socket will prefix outgoing messages with an extra frame containing a request id. That means the full message is (request id, 0, user frames...). The REQ socket will discard all incoming messages that don't begin with these two frames. * Behavior change: When a REQ socket gets an invalid reply, it used to discard the message and return EAGAIN. REQ sockets still discard invalid messages, but keep looking at the next one automatically until a good one is found or there are no more messages. * Add test_req_request_ids.
180 lines
5.4 KiB
C++
180 lines
5.4 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 <stdio.h>
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#include <unistd.h>
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#include <time.h>
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#include "testutil.hpp"
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int main (void)
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{
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void *ctx = zmq_ctx_new ();
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assert (ctx);
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void *req = zmq_socket (ctx, ZMQ_REQ);
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assert (req);
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void *router = zmq_socket (ctx, ZMQ_ROUTER);
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assert (router);
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int enabled = 1;
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int rc = zmq_setsockopt (req, ZMQ_REQ_REQUEST_IDS, &enabled, sizeof (int));
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assert (rc == 0);
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int rcvtimeo = 100;
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rc = zmq_setsockopt (req, ZMQ_RCVTIMEO, &rcvtimeo, sizeof (int));
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assert (rc == 0);
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rc = zmq_connect (req, "tcp://localhost:5555");
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assert (rc == 0);
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rc = zmq_bind (router, "tcp://*:5555");
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assert (rc == 0);
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// Send a multi-part request.
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s_send_seq (req, "ABC", "DEF", SEQ_END);
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zmq_msg_t msg;
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zmq_msg_init (&msg);
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// Receive peer identity
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rc = zmq_msg_recv (&msg, router, 0);
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assert (rc != -1);
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assert (zmq_msg_size (&msg) > 0);
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zmq_msg_t peer_id_msg;
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zmq_msg_init (&peer_id_msg);
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zmq_msg_copy (&peer_id_msg, &msg);
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int more = 0;
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size_t more_size = sizeof (more);
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rc = zmq_getsockopt (router, ZMQ_RCVMORE, &more, &more_size);
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assert (rc == 0);
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assert (more);
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// Receive request id 1
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rc = zmq_msg_recv (&msg, router, 0);
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assert (rc != -1);
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assert (zmq_msg_size (&msg) == sizeof(uint32_t));
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uint32_t req_id = *static_cast<uint32_t *> (zmq_msg_data (&msg));
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zmq_msg_t req_id_msg;
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zmq_msg_init (&req_id_msg);
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zmq_msg_copy (&req_id_msg, &msg);
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more = 0;
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more_size = sizeof (more);
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rc = zmq_getsockopt (router, ZMQ_RCVMORE, &more, &more_size);
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assert (rc == 0);
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assert (more);
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// Receive the rest.
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s_recv_seq (router, 0, "ABC", "DEF", SEQ_END);
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// Send back a bad reply: correct req id
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_copy (&msg, &req_id_msg);
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rc = zmq_msg_send (&msg, router, 0);
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assert (rc != -1);
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// Send back a bad reply: wrong req id
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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uint32_t bad_req_id = req_id + 1;
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zmq_msg_init_data (&msg, &bad_req_id, sizeof (uint32_t), NULL, NULL);
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rc = zmq_msg_send (&msg, router, 0);
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assert (rc != -1);
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// Send back a bad reply: correct req id, 0
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_copy (&msg, &req_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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s_send_seq (router, 0, SEQ_END);
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// Send back a bad reply: correct req id, garbage
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_copy (&msg, &req_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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s_send_seq (router, "FOO", SEQ_END);
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// Send back a bad reply: wrong req id, 0
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_init_data (&msg, &bad_req_id, sizeof (uint32_t), NULL, NULL);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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s_send_seq (router, 0, SEQ_END);
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// Send back a bad reply: correct req id, garbage, data
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_copy (&msg, &req_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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s_send_seq (router, "FOO", "DATA", SEQ_END);
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// Send back a bad reply: wrong req id, 0, data
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_init_data (&msg, &bad_req_id, sizeof (uint32_t), NULL, NULL);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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s_send_seq (router, 0, "DATA", SEQ_END);
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// Send back a good reply.
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zmq_msg_copy (&msg, &peer_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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zmq_msg_copy (&msg, &req_id_msg);
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rc = zmq_msg_send (&msg, router, ZMQ_SNDMORE);
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assert (rc != -1);
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s_send_seq (router, 0, "GHI", SEQ_END);
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// Receive reply. If any of the other messages got through, we wouldn't see
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// this particular data.
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s_recv_seq (req, "GHI", SEQ_END);
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rc = zmq_msg_close (&msg);
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assert (rc == 0);
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rc = zmq_msg_close (&peer_id_msg);
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assert (rc == 0);
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rc = zmq_msg_close (&req_id_msg);
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assert (rc == 0);
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close_zero_linger (req);
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close_zero_linger (router);
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rc = zmq_ctx_term (ctx);
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assert (rc == 0);
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return 0;
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}
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