#include <zmq.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <assert.h>

void *context;
void *responder;

int SendData(const void *pvData, unsigned int uiDataLen)
{
    return zmq_send (responder, pvData, uiDataLen, 0);
}
int RecvData(void *pvData, unsigned int uiDataLen)
{
    return zmq_recv (responder, pvData, uiDataLen, 0);
}

int main (void)
{
  //  Socket to talk to clients
    context = zmq_ctx_new ();
    responder = zmq_socket (context, ZMQ_REP);
    unsigned int uiTimeout = 5 * 1000;
    int rst = 0;

    zmq_setsockopt(responder, ZMQ_RCVTIMEO, &uiTimeout, sizeof(uiTimeout));
    zmq_setsockopt(responder, ZMQ_SNDTIMEO, &uiTimeout, sizeof(uiTimeout));
    int rc = zmq_bind (responder, "tcp://*:5555");
    assert (rc == 0);

    while (1) {
        char buffer [10];
        // zmq_recv (responder, buffer, sizeof buffer, 0);
        printf("start\n");
        rst = RecvData(buffer, sizeof buffer);
        printf("end\n");
        if(rst <= 0 )
        {
            printf("recv error: %d\n", rst);
            continue;
        }
        printf ("Received %s\n", buffer);
        sleep (3);         //  Do some 'work'
        // zmq_send (responder, buffer, sizeof buffer, 0);
        SendData(buffer, sizeof buffer);
        // sleep(4);
    }
    return 0;
}