libzmq/tests/test_raw_sock.cpp
2013-03-12 17:04:51 +01:00

144 lines
4.3 KiB
C++

/*
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 "../include/zmq.h"
#include <string.h>
#include <stdbool.h>
#undef NDEBUG
#include <assert.h>
// ZMTP protocol greeting structure
typedef unsigned char byte;
typedef struct {
byte signature [10]; // 0xFF 8*0x00 0x7F
byte revision; // 2 = ZMTP/2.1
byte socktype; // Defined in ZMTP spec
byte identity [2]; // Empty message
} zmtp_greeting_t;
#define ZMTP_DEALER 5 // Socket type constants
#define ZMTP_ROUTER 6
// This is a greeting matching what 0MQ will send us; note the
// 8-byte size is set to 1 for backwards compatibility
static zmtp_greeting_t greeting
= { { 0xFF, 0, 0, 0, 0, 0, 0, 0, 1, 0x7F }, 2, 0, { 0, 0 } };
int main (void)
{
int rc;
// Set up our context and sockets
void *ctx = zmq_ctx_new ();
assert (ctx);
// We'll be using this socket in raw mode
void *router = zmq_socket (ctx, ZMQ_ROUTER);
assert (router);
int on = 1;
rc = zmq_setsockopt (router, ZMQ_ROUTER_RAW, &on, sizeof (on));
assert (rc == 0);
int zero = 0;
rc = zmq_setsockopt (router, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);
rc = zmq_bind (router, "tcp://*:5555");
assert (rc == 0);
// We'll be using this socket as the other peer
void *dealer = zmq_socket (ctx, ZMQ_DEALER);
assert (dealer);
rc = zmq_setsockopt (dealer, ZMQ_LINGER, &zero, sizeof (zero));
assert (rc == 0);
rc = zmq_connect (dealer, "tcp://localhost:5555");
// Send a message on the dealer socket
rc = zmq_send (dealer, "Hello", 5, 0);
assert (rc == 5);
// First frame is identity
zmq_msg_t identity;
rc = zmq_msg_init (&identity);
assert (rc == 0);
rc = zmq_msg_recv (&identity, router, 0);
assert (rc > 0);
assert (zmq_msg_more (&identity));
// Second frame is greeting signature
byte buffer [255];
rc = zmq_recv (router, buffer, 255, 0);
assert (rc == 10);
assert (memcmp (buffer, greeting.signature, 10) == 0);
// Send our own protocol greeting
rc = zmq_msg_send (&identity, router, ZMQ_SNDMORE);
assert (rc > 0);
greeting.socktype = ZMTP_ROUTER;
rc = zmq_send (router, &greeting, sizeof (greeting), 0);
assert (rc == sizeof (greeting));
// Now we expect the data from the DEALER socket
// First frame is, again, the identity of the connection
rc = zmq_msg_recv (&identity, router, 0);
assert (rc > 0);
assert (zmq_msg_more (&identity));
// Second frame contains all remaining data from DEALER
rc = zmq_recv (router, buffer, 255, 0);
assert (rc == 11);
// First four bytes are [revision][socktype][identity]
assert (buffer [0] == 2); // ZMTP/2.1
assert (buffer [1] == ZMTP_DEALER);
// Identity is 2 byte message
assert (buffer [2] == 0); // Flags = 0
assert (buffer [3] == 0); // Size = 0
// Then we have a 5-byte message "Hello"
assert (buffer [4] == 0); // Flags = 0
assert (buffer [5] == 5); // Size = 5
assert (memcmp (buffer + 6, "Hello", 5) == 0);
// Send "World" back to DEALER
rc = zmq_msg_send (&identity, router, ZMQ_SNDMORE);
assert (rc > 0);
byte world [] = { 0, 5, 'W', 'o', 'r', 'l', 'd' };
rc = zmq_send (router, world, sizeof (world), 0);
assert (rc == sizeof (world));
// Expect response on DEALER socket
rc = zmq_recv (dealer, buffer, 255, 0);
assert (rc == 5);
assert (memcmp (buffer, "World", 5) == 0);
rc = zmq_close (dealer);
assert (rc == 0);
rc = zmq_close (router);
assert (rc == 0);
rc = zmq_ctx_term (ctx);
assert (rc == 0);
return 0;
}