search.php

<?php
/**
 * User: carbonsphere
 * Date: 15/08/2017
 * This is an example that can be used to search for UHPPOTE controller board thats on the same network
 */

include "UHPPOTE.php";


$a = new uhppote(); 

/*
 * Get Search Command from UHPPOTE Class
 */
$cmd = $a->getCmdHex('search');

echo "Send the folling command to network\n$cmd\n";

/*
 *  $ip/$port  of controller board
 *  255.255.255.255 is broadcasting to network address
 *  Normally UHPPOTE controller port is static 60000
 */
$ip = "255.255.255.255";
$port = 60000;
$sock = createSocket();

// Enable broadcast
socket_set_option($sock, 1, 6, TRUE);

/*
 *  Input is binary format of command
 */
$input = hex2bin($cmd);

echo "Sending....\n";
if( ! socket_sendto($sock, $input , strlen($input) , 0 , $ip , $port))
{
  $errorcode = socket_last_error();
  $errormsg = socket_strerror($errorcode);
  echo "There is error\n";
  exit;
}

/*
 * Once the command is broadcast, now we need to listen for return status
 */
echo "Listening for return status\n";
$reply = getReturnPacket($sock);

/*
 * Process returned message. Returned message is in binary format
 * So we revert it into hex before passing into procMessages
 */
echo "Processing return status\n";
$procmsg = $a->procCmd(bin2hex($reply));


var_dump($procmsg);

echo "Success!\n";



function createSocket() 
{
  if(!($sock = socket_create(AF_INET, SOCK_DGRAM, 0)))
  {
    $errorcode = socket_last_error();
    $errormsg = socket_strerror($errorcode);

    die("Couldn't create socket: [$errorcode] $errormsg \n");
   }
   return $sock;
}


function getReturnPacket($sock) 
{
  if(socket_recv ( $sock , $reply , 2045 , MSG_WAITALL ) === FALSE)
  {
     $errorcode = socket_last_error();
     $errormsg = socket_strerror($errorcode);

    die("Receive socket Error: [$errorcode] $errormsg \n");
  }
  return $reply;
}

?>