Linux SL Integration with other software

#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");
}