脚本检测联网状态

脚本检测联网状态

<?php
    /** 
     * 发送post请求 
     * @param string $url 请求地址 
     * @param array $post_data post键值对数据 
     * @return string 
     */  
    function send_post($url, $post_data) {        
      $postdata = http_build_query($post_data);  
      $options = array(  
        'http' => array(  
          'method' => 'POST',  
          'header' => 'Content-type:application/x-www-form-urlencoded',  
          'content' => $postdata,  
          'timeout' => 15 * 60 // 超时时间（单位:s）  
        )  
      );  
      $context = stream_context_create($options);  
      $result = file_get_contents($url, false, $context);  
      
      return $result;  
    }

    //读取2个字符串之间的字符，读取成功返回读取字符，失败返回0
    class get_c_str {  
        var $str;  
        var $start_str;  
        var $end_str;  
        var $start_pos;  
        var $end_pos;  
        var $c_str_l;  
        var $contents;  
        function get_str($str,$start_str,$end_str){  
           $this->str = $str;  
           $this->start_str = $start_str;  
           $this->end_str = $end_str;  
           $this->start_pos = strpos($this->str,$this->start_str)+strlen($this->start_str);  
           $this->end_pos = strpos($this->str,$this->end_str);  
           $this->c_str_l = $this->end_pos - $this->start_pos;  
           $this->contents = substr($this->str,$this->start_pos,$this->c_str_l);  
           return $this->contents;  
        }  
    }
    //检测字符串中是否包含特定字符
    function checkstr($str,$needle){
        $tmparray = explode($needle,$str);
        if(count($tmparray)>1){return true;} else{return false;}
        }
    //PING检测是否通，通返回数据 result:1 time=延时；不通返回 result:0 time=timeout  时间为ms    
    function pingcheck($ip){
        exec("ping $ip -c 1 -W 1",$info);
        $get_c_str = new get_c_str;
        if(checkstr($info[4],"1 received")){
            $ping = 1;              
            $time = $get_c_str -> get_str($info[4],'time ','ms');   
        }else{
            $ping = 0;
            $time = "timeout"; 
        }
        return array('result' => $ping , 'time' => $time);
    }
    //检测iptable
    function iptablecheck(){
        exec("/sbin/iptables -L",$fuck);
        if(checkstr($fuck[2],"REJECT")){$iptable=1;}else{$iptable=0;}
        return $iptable;
    }
    //调用pingcheck后返回ping的结果，返回ping成功的次数
    function check($ip, $times, $interval){        
        for ($i=1; $i <= $times ; $i++) { 
             $do = pingcheck($ip);
             echo "ping".$i."=".$do['result']." time".$i."=".$do['time']."ms\n";
             $result = $do['result'] + $result;
             sleep($interval);
        }
        return $result;
    }

        $t1 = microtime(true);
        $iptable = iptablecheck();
        $ip = '114.114.114.114';
        $times = 10;
        $all = check($ip, $times, 4);
        if( $all >= 4 ){
            $ping = 1;//通
        }else{
            $ping = 0;//不通
       }
        echo "\nresult: ping通次数=".$all;
        if ($ping==0 && $iptable==0){     
                exec("/sbin/iptables -I INPUT 1 -s 192.168.99.17/30 -m state --state NEW -m tcp -p tcp -m multiport --dports 80,81,88,100,1100,2525,8099 -j REJECT");
                $do = "插入iptables";
                echo "\n".$do."\n";
                $post_data = array(  
                            'host' => '代理(电信)',
                            'times' => $times,
                            'errors' => $times-$all,
                            'do' => $do,
                            'status' => "iptable:".iptablecheck()."--ping:".$ping
                );  
                send_post('http://192.168.99.16:8000', $post_data);
        }
        elseif($ping ==1 && $iptable==1){
                exec("/sbin/iptables -D INPUT 1");
                $do =  "删除iptables";
                echo "\n".$do."\n";
                $post_data = array(  
                            'host' => '代理(电信)',
                            'times' => $times,
                            'errors' => $times-$all,
                            'do' => $do,
                            'status' => "iptable:".iptablecheck()."--ping:".$ping
                );  
                send_post('http://192.168.99.15:8000', $post_data);
        }
        echo "\niptable:".$iptable."--ping:".$ping."--时间:".date('y-m-d H:i:s',time())."\n";
        $t2 = microtime(true);
        echo '耗时'.round($t2-$t1,3)."秒\n"; 
?>