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* Sieve: coping with a dbmail bug in some versions of the Server. Server using formal syntax being reserved for client->server communication

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This commit is contained in:
Klaus Leithoff 2015-01-27 12:23:10 +00:00
parent 3c048c6bb9
commit aab42f722a
1 changed files with 115 additions and 0 deletions
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115
emailadmin/inc/class.emailadmin_sieve.inc.php
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@ -428,6 +428,121 @@ class emailadmin_sieve extends Net_Sieve
return $result;
}
/**
* Send a command and retrieves a response from the server.
*
* @param string $cmd The command to send.
* @param boolean $auth Whether this is an authentication command.
*
* @return string|PEAR_Error Reponse string if an OK response, PEAR_Error
* if a NO response.
*/
function _doCmd($cmd = '', $auth = false)
{
$referralCount = 0;
while ($referralCount < $this->_maxReferralCount) {
if (strlen($cmd)) {
$error = $this->_sendCmd($cmd);
if (is_a($error, 'PEAR_Error')) {
return $error;
}
}
$response = '';
while (true) {
$line = $this->_recvLn();
if (is_a($line, 'PEAR_Error')) {
return $line;
}
if (preg_match('/^(OK|NO)/i', $line, $tag)) {
// Check for string literal message.
// ServerResponse may send {nm} (nm representing a number)
// dbmail (in some versions) sends: {nm+} thus breaking RFC5804 rules (Section 4 Formal Syntax)
// {nm+} may only be used in communicating from client TO server; (not Server to Client)
// we work around this bug (allowing +) using a patch introduced with roundcube 2 years ago.
//if (preg_match('/{([0-9]+)}$/', $line, $matches)) { //original
if (preg_match('/{([0-9]+)\+?}$/', $line, $matches)) { //patched to cope with dbmail
$line = substr($line, 0, -(strlen($matches[1]) + 2))
. str_replace(
"\r\n", ' ', $this->_recvBytes($matches[1] + 2)
);
}
if ('OK' == $this->_toUpper($tag[1])) {
$response .= $line;
return rtrim($response);
}
return $this->_pear->raiseError(trim($response . substr($line, 2)), 3);
}
if (preg_match('/^BYE/i', $line)) {
$error = $this->disconnect(false);
if (is_a($error, 'PEAR_Error')) {
return $this->_pear->raiseError(
'Cannot handle BYE, the error was: '
. $error->getMessage(),
4
);
}
// Check for referral, then follow it. Otherwise, carp an
// error.
if (preg_match('/^bye \(referral "(sieve:\/\/)?([^"]+)/i', $line, $matches)) {
// Replace the old host with the referral host
// preserving any protocol prefix.
$this->_data['host'] = preg_replace(
'/\w+(?!(\w|\:\/\/)).*/', $matches[2],
$this->_data['host']
);
$error = $this->_handleConnectAndLogin();
if (is_a($error, 'PEAR_Error')) {
return $this->_pear->raiseError(
'Cannot follow referral to '
. $this->_data['host'] . ', the error was: '
. $error->getMessage(),
5
);
}
break;
}
return $this->_pear->raiseError(trim($response . $line), 6);
}
// ServerResponse may send {nm} (nm representing a number)
// dbmail (in some versions) sends: {nm+} thus breaking RFC5804 rules (Section 4 Formal Syntax)
// {nm+} may only be used in communicating from client TO server; (not Server to Client)
// we work around this bug (allowing +) using a patch introduced with roundcube 2 years ago.
// although roundcube suggested only the change in line
//if (preg_match('/^{([0-9]+)}/', $line, $matches)) { //original
if (preg_match('/^{([0-9]+)\+?}/', $line, $matches)) { //patched to cope with dbmail
// Matches literal string responses.
$line = $this->_recvBytes($matches[1] + 2);
if (!$auth) {
// Receive the pending OK only if we aren't
// authenticating since string responses during
// authentication don't need an OK.
$this->_recvLn();
}
return $line;
}
if ($auth) {
// String responses during authentication don't need an
// OK.
$response .= $line;
return rtrim($response);
}
$response .= $line . "\r\n";
$referralCount++;
}
}
return $this->_pear->raiseError('Max referral count (' . $referralCount . ') reached. Cyrus murder loop error?', 7);
}
function getRules()
{
if (!isset($this->rules)) $this->retrieveRules();