void CommandExecutor::run() {
for(;;) {
// wait for data to become available
while(_commandBuffer.availableToRead()==0) {
#if !defined(DEBUG)
// go to immediate sleep mode. will wake immediately on data arrival (IRQ)
__WFI();
#endif
}
// keep the busy light on while buffered commands are processed
_indicators.setBusy(true);
do {
processNextCommand();
} while(_commandBuffer.availableToRead()!=0);
// buffered commands processed, switch off the indicator
_indicators.setBusy(false);
}
}
void AtCommands::done( QAtResult::ResultCode result )
{
// Record the final result code for the command we just executed.
this->result = result;
// Arrange for the next command in sequence to be processed.
// Do it upon the next event loop entry to prevent the
// stack from growing too much.
QTimer::singleShot( 0, this, SLOT(processNextCommand()) );
}
void AtCommands::commands( const QStringList& newcmds )
{
// Start by assuming that the final result will be OK.
// If it is ever set to non-OK, then the commands stop.
result = QAtResult::OK;
// Save the commands.
cmds = newcmds;
cmdsPosn = 0;
// Process the first command.
processNextCommand();
}
bool LocalPrefServer::ProcessNextCommand()
{
processNextCommand();
}
void LocalPrefServer::Run()
{
while( !model->IsBulletFinished() ) {
processNextCommand();
}
}
// main logic of the component - a slot triggered upon data entering the socket
// comments inline...
void QwwSmtpClientPrivate::_q_readFromSocket() {
while (socket->canReadLine()) {
QString line = socket->readLine();
qDebug() << "SMTP <<<" << line.toUtf8().constData();
QRegExp rx("(\\d+)-(.*)\n"); // multiline response (aka 250-XYZ)
QRegExp rxlast("(\\d+) (.*)\n"); // single or last line response (aka 250 XYZ)
bool mid = rx.exactMatch(line);
bool last = rxlast.exactMatch(line);
// multiline
if (mid){
int status = rx.cap(1).toInt();
SMTPCommand &cmd = commandqueue.head();
switch (cmd.type) {
// trying to connect
case SMTPCommand::Connect: {
int stage = cmd.extra.toInt();
// stage 0 completed with success - socket is connected and EHLO was sent
if(stage==1 && status==250){
QString arg = rx.cap(2).trimmed();
parseOption(arg); // we're probably receiving options
}
}
break;
// trying to establish deferred SSL handshake
case SMTPCommand::StartTLS: {
int stage = cmd.extra.toInt();
// stage 0 (negotiation) completed ok
if(stage==1 && status==250){
QString arg = rx.cap(2).trimmed();
parseOption(arg); // we're probably receiving options
}
}
default: break;
}
} else
// single line
if (last) {
int status = rxlast.cap(1).toInt();
SMTPCommand &cmd = commandqueue.head();
switch (cmd.type) {
// trying to connect
case SMTPCommand::Connect: {
int stage = cmd.extra.toInt();
// connection established, server sent its banner
if (stage==0 && status==220) {
sendEhlo(); // connect ok, send ehlo
}
// server responded to EHLO
if (stage==1 && status==250){
// success (EHLO)
parseOption(rxlast.cap(2).trimmed()); // we're probably receiving the last option
errorString.clear();
setState(QwwSmtpClient::Connected);
processNextCommand();
}
// server responded to HELO (EHLO failed)
if (state==2 && status==250) {
// success (HELO)
errorString.clear();
setState(QwwSmtpClient::Connected);
processNextCommand();
}
// EHLO failed, reason given in errorString
if (stage==1 && (status==554 || status==501 || status==502 || status==421)) {
errorString = rxlast.cap(2).trimmed();
sendHelo(); // ehlo failed, send helo
cmd.extra = 2;
}
//abortDialog();
}
break;
// trying to establish a delayed SSL handshake
case SMTPCommand::StartTLS: {
int stage = cmd.extra.toInt();
// received an invitation from the server to enter TLS mode
if (stage==0 && status==220) {
qDebug() << "SMTP ** startClientEncruption";
socket->startClientEncryption();
}
// TLS established, connection is encrypted, EHLO was sent
else if (stage==1 && status==250) {
setState(QwwSmtpClient::Connected);
parseOption(rxlast.cap(2).trimmed()); // we're probably receiving options
errorString.clear();
emit q->tlsStarted();
processNextCommand();
}
// starttls failed
else {
qDebug() << "TLS failed at stage " << stage << ": " << line;
errorString = "TLS failed";
emit q->done(false);
}
}
break;
// trying to authenticate the client to the server
case SMTPCommand::Authenticate: {
int stage = cmd.extra.toInt();
if (stage==0 && status==334) {
// AUTH mode was accepted by the server, 1st challenge sent
QwwSmtpClient::AuthMode authmode = (QwwSmtpClient::AuthMode)cmd.data.toList().at(0).toInt();
errorString.clear();
switch (authmode) {
case QwwSmtpClient::AuthPlain:
sendAuthPlain(cmd.data.toList().at(1).toString(), cmd.data.toList().at(2).toString());
break;
case QwwSmtpClient::AuthLogin:
sendAuthLogin(cmd.data.toList().at(1).toString(), cmd.data.toList().at(2).toString(), 1);
break;
default:
qWarning("I shouldn't be here");
setState(QwwSmtpClient::Connected);
processNextCommand();
break;
}
cmd.extra = stage+1;
} else if (stage==1 && status==334) {
// AUTH mode and user names were acccepted by the server, 2nd challenge sent
QwwSmtpClient::AuthMode authmode = (QwwSmtpClient::AuthMode)cmd.data.toList().at(0).toInt();
errorString.clear();
switch (authmode) {
case QwwSmtpClient::AuthPlain:
// auth failed
setState(QwwSmtpClient::Connected);
processNextCommand();
break;
case QwwSmtpClient::AuthLogin:
sendAuthLogin(cmd.data.toList().at(1).toString(), cmd.data.toList().at(2).toString(), 2);
break;
default:
qWarning("I shouldn't be here");
setState(QwwSmtpClient::Connected);
processNextCommand();
break;
}
} else if (stage==2 && status==334) {
// auth failed
errorString = rxlast.cap(2).trimmed();
setState(QwwSmtpClient::Connected);
processNextCommand();
} else if (status==235) {
// auth ok
errorString.clear();
emit q->authenticated();
setState(QwwSmtpClient::Connected);
processNextCommand();
} else {
errorString = rxlast.cap(2).trimmed();
setState(QwwSmtpClient::Connected);
emit q->done(false);
}
}
break;
// trying to send mail
case SMTPCommand::Mail:
case SMTPCommand::MailBurl:
{
int stage = cmd.extra.toInt();
// temporary failure upon receiving the sender address (greylisting probably)
if (status==421 && stage==0) {
errorString = rxlast.cap(2).trimmed();
// temporary envelope failure (greylisting)
setState(QwwSmtpClient::Connected);
processNextCommand(false);
}
if (status==250 && stage==0) {
// sender accepted
errorString.clear();
sendRcpt();
} else if (status==250 && stage==1) {
// all receivers accepted
if (cmd.type == SMTPCommand::MailBurl) {
errorString.clear();
QByteArray url = cmd.data.toList().at(2).toByteArray();
qDebug() << "SMTP >>> BURL" << url << "LAST";
socket->write("BURL " + url + " LAST\r\n");
cmd.extra=2;
} else {
errorString.clear();
qDebug() << "SMTP >>> DATA";
socket->write("DATA\r\n");
cmd.extra=2;
}
} else if ((cmd.type == SMTPCommand::Mail && status==354 && stage==2)) {
// DATA command accepted
errorString.clear();
QByteArray toBeWritten = cmd.data.toList().at(2).toString().toUtf8();
qDebug() << "SMTP >>>" << toBeWritten << "\r\n.\r\n";
socket->write(toBeWritten); // expecting data to be already escaped (CRLF.CRLF)
socket->write("\r\n.\r\n"); // termination token - CRLF.CRLF
cmd.extra=3;
} else if ((cmd.type == SMTPCommand::MailBurl && status==354 && stage==2)) {
// BURL succeeded
setState(QwwSmtpClient::Connected);
errorString.clear();
processNextCommand();
} else if ((cmd.type == SMTPCommand::Mail && status==250 && stage==3)) {
// mail queued
setState(QwwSmtpClient::Connected);
errorString.clear();
processNextCommand();
} else {
// something went wrong
errorString = rxlast.cap(2).trimmed();
setState(QwwSmtpClient::Connected);
emit q->done(false);
processNextCommand();
}
}
default: break;
}
} else {
qDebug() << "None of two regular expressions matched the input" << line;
}
}
}
