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php - 检查 PHP 中是 SOCKS4 还是 5?

转载 作者:行者123 更新时间:2023-12-05 04:18:48 26 4
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基本上,我有一个代理列表。我想将它们分成 SOCKS4 和 SOCKS5。我想编写一个小的 PHP 脚本来为我做这件事。我将如何在 PHP 中检测它是哪种类型?

最佳答案

您需要自己编写一些小代码来尝试连接您的任何代理并检查 socks 版本。不同版本的连接协议(protocol)和错误代码记录在 wikipedia page about SOCKS 中.

考虑到这一点,剩下的就是与 PHP 的标准套接字连接。

例子:

$proxies = array( '66.135.131.74:1681', '172.52.61.244:48943',
'75.101.237.217:1080', '76.68.128.165:39879',);

foreach ($proxies as $index => $proxy)
{
$type = SOCKSVersion::getType($proxy);
$typeName = SOCKSVersion::getTypeName($type);
printf("Proxy #%d: %s\n", $index, $typeName);
}

输出:

Proxy #0: SOCKS4
Proxy #1: SOCKS4
Proxy #2: Unknown
Proxy #3: SOCKS4

此示例性实现仅检查 SOCKS4,但可以通过添加类似于 isSocks4() 的方法轻松扩展以测试 SOCK4a 和 SOCKS5:

/**
* SOCKS server identifiation class.
*/
class SOCKSVersion
{
const TYPE_UNKNOWN = 0;
const TYPE_SOCKS4 = 1;
const TYPE_SOCKS4a = 2;
const TYPE_SOCKS5 = 3;

/**
* @var string[]
*/
private static $typeNames = array(
self::TYPE_UNKNOWN => 'Unknown',
self::TYPE_SOCKS4 => 'SOCKS4',
self::TYPE_SOCKS4a => 'SOCKS4a',
self::TYPE_SOCKS5 => 'SOCKS5',
);

/**
* @var int
*/
private $timeout = 30;

/**
* @var int
*/
private $host, $port;

/**
* @var string[]
*/
private $errors;

/**
* @var string[]
*/
private $socks4Errors = array(
91 => "Request rejected or failed",
92 => "Request failed because client is not running identd (or not reachable from the server)",
93 => "Request failed because client's identd could not confirm the user ID string in the request",
);

public function __construct($endpoint)
{
$this->setEndpoint($endpoint);
}

/**
* @static
* @param string $proxy
* @return int any of the TYPE_* constants
*/
public static function getType($proxy)
{
$socks = new self($proxy);
return $socks->getSocksVersion();
}

/**
* @static
* @param int $type
* @return string
*/
public static function getTypeName($type)
{
$typeNames = self::$typeNames;
if (isset($typeNames[$type])) {
return $typeNames[$type];
}
return $typeNames[self::TYPE_UNKNOWN];
}

public function setEndpoint($endpoint)
{
if (!$parts = parse_url('http://' . $endpoint)) {
throw new InvalidArgumentException(sprintf('Unable to parse endpoint "%s".', $endpoint));
}
if (empty($parts['host'])) {
throw new InvalidArgumentException('No host given.');
}
if (empty($parts['port'])) {
throw new InvalidArgumentException('No port given.');
}
$this->host = $parts['host'];
$this->port = $parts['port'];
}

/**
* @return int any of the TYPE_* constants
*/
public function getSocksVersion()
{
try {
if ($this->isSocks4()) {
return self::TYPE_SOCKS4;
}
} catch (BadFunctionCallException $e) {
$this->errors[] = sprintf("SOCKS4 Test: ", $this->host, $e->getMessage());
}
return self::TYPE_UNKNOWN;
}

public function isSocks4()
{
$socket = stream_socket_client("tcp://" . $this->host . ":" . $this->port, $errno, $errstr, $this->timeout, STREAM_CLIENT_CONNECT);
if (!$socket) {
throw new BadFunctionCallException(sprintf('Socket-Error #%d: %s', $errno, $errstr));
}

// SOCKS4; @link <http://en.wikipedia.org/wiki/SOCKS#Protocol>
$userId = "";
$packet = "\x04\x01" . pack("n", $this->port) . pack("H*", dechex(ip2long($this->host))) . $userId . "\0";
fwrite($socket, $packet, strlen($packet));
$response = fread($socket, 9);
if (strlen($response) == 8 && (ord($response[0]) == 0 || ord($response[0]) == 4)) {
$status = ord($response[1]);
if ($status != 90) {
throw new BadFunctionCallException(sprintf("Error from SOCKS4 server: %s.", $this->socks4Errors[$status]));
}
} else {
throw new BadFunctionCallException("The SOCKS server returned an invalid response");
}
fclose($socket);

return TRUE;
}
}

希望对您有所帮助。如果您引入多个版本,您应该改进错误处理,并且如果在之前的测试中连接失败,则不要多次连接到同一主机。

关于php - 检查 PHP 中是 SOCKS4 还是 5?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/8471086/

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