<?php

namespace RobThree\Auth\Providers\Time;

/**
 * Takes the time from any NTP server
 */
class NTPTimeProvider implements ITimeProvider
{
    /** @var string */
    public $host;

    /** @var int */
    public $port;

    /** @var int */
    public $timeout;

    /**
     * @param string $host
     * @param int $port
     * @param int $timeout
     */
    public function __construct($host = 'time.google.com', $port = 123, $timeout = 1)
    {
        $this->host = $host;

        if (!is_int($port) || $port <= 0 || $port > 65535) {
            throw new TimeException('Port must be 0 < port < 65535');
        }
        $this->port = $port;

        if (!is_int($timeout) || $timeout < 0) {
            throw new TimeException('Timeout must be >= 0');
        }
        $this->timeout = $timeout;
    }

    /**
     * {@inheritdoc}
     */
    public function getTime()
    {
        try {
            /* Create a socket and connect to NTP server */
            $sock = socket_create(AF_INET, SOCK_DGRAM, SOL_UDP);
            socket_set_option($sock, SOL_SOCKET, SO_RCVTIMEO, ['sec' => $this->timeout, 'usec' => 0]);
            socket_connect($sock, $this->host, $this->port);

            /* Send request */
            $msg = "\010" . str_repeat("\0", 47);
            socket_send($sock, $msg, strlen($msg), 0);

            /* Receive response and close socket */
            if (socket_recv($sock, $recv, 48, MSG_WAITALL) === false) {
                throw new \Exception(socket_strerror(socket_last_error($sock)));
            }
            socket_close($sock);

            /* Interpret response */
            $data = unpack('N12', $recv);
            $timestamp = (int) sprintf('%u', $data[9]);

            /* NTP is number of seconds since 0000 UT on 1 January 1900 Unix time is seconds since 0000 UT on 1 January 1970 */
            return $timestamp - 2208988800;
        } catch (\Exception $ex) {
            throw new TimeException(sprintf('Unable to retrieve time from %s (%s)', $this->host, $ex->getMessage()));
        }
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----OTM2NTk5OTEyMTc0OTUyNSA1MTU4OTM2NTE5ODUyMzY1IDE0MDUxMjM5MDMwMzcyNjY=