Question

我想为远程控制台创建接口，需要使用第2页记录的自定义协议here。我创建了符合协议要求的正确类和数据包。问题是它工作一次（我工作的事情导致服务器返回数据包）现在每个请求都没有返回任何内容。我还应该提到的是，如果格式错误，服务器可以忽略数据包。我是否创建了与协议冲突的数据包，或者与此代码相关的数据包？

这是我的单词类：

class Word {
    public $word;

    public function __construct($word) {
        $this->word = $word;
    }

    public function pack() {
        return pack('Va*C', strlen($this->word), $this->word, 0);
    }

}

这是我的包类：

require_once dirname(__FILE__).DIRECTORY_SEPARATOR.'word.class.php';

class Packet {
    public $words = array();
    protected $size = 0;
    protected $is_request;
    protected $from_client;

    /**
     * Construct packet
     * 
     * @param   bool    $is_request 
     * @param   bool    $is_client
     * @param   string  $command
     */
    public function __construct($is_request, $from_client, $command) {
        $this->is_request = $is_request;
        $this->from_client = $from_client;

        $this->size +=4 ; // size of first paremeter (4 bytes integer)

        $command = trim(preg_replace('!\s+!', ' ', $command)); // remove double spaces

        $this->size += strlen( str_ireplace(' ', '', $command) ) ; // size of words

        $this->words = explode(' ',$command);

        $this->size += count($this->words)*5; // add size of each word size + null byte (5 bytes for each word)

        $this->size += 4; // add size of packet size

        $this->size += 4; // size of words count
    }

    /**
     * Return words packet string
     * 
     * @return String
     */
    protected function getWords(){
        $result = '';
        foreach($this->words AS $word) {
            $word = new Word($word);
            $result.= $word->pack();
        }

        return $result;
    }

    /**
     * Return packet for sending
     * 
     * @return string
     */
    public function pack() {
        return pack('C4VV', (int)$this->is_request, (int)$this->from_client, 0, 0, $this->size, count($this->words) ).$this->getWords();
    }

    public function getSize(){
        return $this->size;
    }

}

这是我的socket_read：

$bytes_received = socket_read($socket, 16384);
echo $bytes_received." bytes received.\n";
var_dump( unpack('C4VVa*', $response) );

我也尝试过这个和同样的结果：

$bytes_received = socket_recvfrom($socket, $response, 16384, 0, $address, $service_port);

当然我使用root帐户测试了php上的代码。

使用pack为套接字创建数据包

0 个答案: