#include <stdlib.h>

#include <stdio.h>

#include <errno.h>

#include <unistd.h>

#include <fcntl.h>

#include <sys/stat.h>

#include <arpa/inet.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <stdint.h>

#include <string.h>

#include <math.h>

 void printUsage();

 typedef int bool;

 #define true 1

 #define false 0

int main( int argc, const char* argv[] )

{

/* ********************************************

 * Actual socket code

 **********************************************/

int socketfd; // socket handle

// open the socket

// http://man7.org/linux/man-pages/man2/socket.2.html

socketfd = socket(AF_INET, // IPv4

                  SOCK_STREAM, // a TCP connection

                  6); // protocol. 6 is TCP

if (!socketfd)

{

  printf("opening socket failed\n");

  return 1;

}

// no need to bind this one. CODESYS is already bound so it is acting as a server.

// We are a client, so we don't need a fixed address/port to be reached at

// connect to CODESYS

// first we need to create the struct where we put the connection info

struct sockaddr_in saCodesys;

// init the struct

bzero((char *) &saCodesys, sizeof(saCodesys));

// put in the information

saCodesys.sin_family = AF_INET; // IPv4

saCodesys.sin_port = htons(1200); // CODESYS port

// Convert IPv4 address from text to binary form

  if(inet_pton(AF_INET, "127.0.0.1", (struct sockaddr *)&saCodesys.sin_addr)<=0)

  {

      printf("Invalid address/ Address not supported \n");

      // close the socket

      close(socketfd);

      return 2;

  }

  if (connect(socketfd, (const struct sockaddr *)&saCodesys, sizeof(saCodesys)) < 0)

  {

    printf("Connection Failed %d\n", errno);

    // close the socket

    close(socketfd);

    return 3;

  }

/* *************************************

 * Sending data

 ***************************************/

    // super smart A.I. algorithm putting out production targets once a second

    uint16_t uiProductionTarget = 0;

    int counter = 0;

    while (1)

    {

      uiProductionTarget = (sin(counter / 100.0) + 1) * 100;

      if (send(socketfd, &uiProductionTarget, sizeof(uiProductionTarget), 0 /* no flags */) < 0)

      {

        printf("send failed. Ending.\n");

        break;

      }

      else

      {

        printf("sent target: %d\n", uiProductionTarget);

      }

      sleep(1); // wait a ms before doing the math again.

      counter ++;

    }

    // close the socket

    close(socketfd);

    printf("closing down.\n", );

    return 0;

}

void printUsage()

{

  printf("just run it\n");

}