public function proxify(\Erebot\URIInterface $proxyURI, \Erebot\URIInterface $nextURI)
{
$credentials = $proxyURI->getUserInfo();
$host = $nextURI->getHost();
$port = $nextURI->getPort();
$scheme = $nextURI->getScheme();
if ($port === null) {
$port = getservbyname($scheme, 'tcp');
}
if (!is_int($port) || $port <= 0 || $port > 65535) {
throw new \Erebot\InvalidValueException('Invalid port');
}
$request = "";
$request .= sprintf("CONNECT %s:%d HTTP/1.0\r\n", $host, $port);
$request .= sprintf("Host: %s:%d\r\n", $host, $port);
$request .= "User-Agent: Erebot/dev-master\r\n";
if ($credentials !== null) {
$request .= sprintf("Proxy-Authorization: basic %s\r\n", base64_encode($credentials));
}
$request .= "\r\n";
for ($written = 0, $len = strlen($request); $written < $len; $written += $fwrite) {
$fwrite = fwrite($this->_socket, substr($request, $written));
if ($fwrite === false) {
throw new \Erebot\Exception('Connection closed by proxy');
}
}
$line = stream_get_line($this->_socket, 4096, "\r\n");
if ($line === false) {
throw new \Erebot\InvalidValueException('Invalid response from proxy');
}
$this->_logger->debug('%(line)s', array('line' => addcslashes($line, ".. ")));
$contents = array_filter(explode(" ", $line));
switch ((int) $contents[1]) {
case 200:
break;
case 407:
throw new \Erebot\Exception('Proxy authentication required');
default:
throw new \Erebot\Exception('Connection rejected by proxy');
}
// Avoid an endless loop by limiting the number of headers.
// No HTTP server is likely to send more than 2^10 headers anyway.
$max = 1 << 10;
for ($i = 0; $i < $max; $i++) {
$line = stream_get_line($this->_socket, 4096, "\r\n");
if ($line === false) {
throw new \Erebot\InvalidValueException('Invalid response from proxy');
}
if ($line == "") {
break;
}
$this->_logger->debug('%(line)s', array('line' => addcslashes($line, ".. ")));
}
if ($i === $max) {
throw new \Erebot\InvalidValueException('Endless loop detected in proxy response');
}
}
public function proxify(\Erebot\URIInterface $proxyURI, \Erebot\URIInterface $nextURI)
{
$port = $nextURI->getPort();
$scheme = $nextURI->getScheme();
if ($port === null) {
$port = getservbyname($scheme, 'tcp');
}
if (!is_int($port) || $port <= 0 || $port > 65535) {
throw new \Erebot\InvalidValueException('Invalid port');
}
// No authentication or username/password-based authentication.
$this->write("");
$line = $this->read(2);
if ($line[0] != "") {
throw new \Erebot\InvalidValueException('Bad SOCKS version');
}
switch (ord($line[1])) {
case 0:
// No authentication
break;
case 2:
// Username/password-based authentication
$this->userpass($proxyURI);
break;
default:
throw new \Erebot\InvalidValueException('No acceptable method');
}
// CONNECT.
$host = $nextURI->getHost();
$this->write("" . pack("Ca*n", strlen($host), $host, $port));
$line = $this->read(4);
if ($line[0] != "") {
throw new \Erebot\InvalidValueException('Bad SOCKS version');
}
$error = ord($line[1]);
if ($error) {
// Taken fromt eh RFC.
$errors = array(1 => 'General SOCKS server failure', 'Connection not allowed by ruleset', 'Network unreachable', 'Host unreachable', 'Connection refused', 'TTL expired', 'Command not supported', 'Address type not supported');
if (!isset($errors[$error])) {
throw new \Erebot\InvalidValueException('Unknown error');
}
throw new \Erebot\InvalidValueException($errors[$error]);
}
switch (ord($line[3])) {
case 1:
// IPv4.
$this->read(4);
break;
case 3:
// Domain name.
$len = ord($this->read(1));
$this->read($len);
break;
case 4:
// IPv6.
$this->read(16);
break;
default:
throw new \Erebot\InvalidValueException('Address type not supported');
}
// Consume the port.
$this->read(2);
}
