/**
* Initializes the SMTP communications by sending the EHLO
* If EHLO errors out, it will try the HELO command.
*
* Params
* sd - Socket descriptor
* domain - Your domain name.
*
* Return
* - ERROR
* - SUCCESS
*/
int
smtpInit(dsocket *sd, const char *domain)
{
int retval;
printProgress("Init connection...");
retval = init(sd);
if (retval == ERROR) {
return retval;
}
printProgress("Greeting the SMTP server...");
retval = ehlo(sd, domain);
if (retval == ERROR) {
/*
* Per RFC, if ehlo error's out, you can
* ignore the error, RSET and try a
* regular helo.
*/
rset(sd);
retval = helo(sd, domain);
}
return retval;
}
int
smtpInitAfterTLS(dsocket *sd, const char *domain)
{
int retval;
printProgress("Greeting the SMTP server...");
retval = ehlo(sd, domain);
return retval;
}
void QxtSmtpPrivate::socketRead()
{
buffer += socket->readAll();
while (true)
{
int pos = buffer.indexOf("\r\n");
if (pos < 0) return;
QByteArray line = buffer.left(pos);
buffer = buffer.mid(pos + 2);
QByteArray code = line.left(3);
switch (state)
{
case StartState:
if (code[0] != '2')
{
socket->disconnectFromHost();
}
else
{
ehlo();
}
break;
case HeloSent:
case EhloSent:
case EhloGreetReceived:
parseEhlo(code, (line[3] != ' '), line.mid(4));
break;
#ifndef QT_NO_OPENSSL
case StartTLSSent:
if (code == "220")
{
socket->startClientEncryption();
ehlo();
}
else
{
authenticate();
}
break;
#endif
case AuthRequestSent:
case AuthUsernameSent:
if (authType == AuthPlain) authPlain();
else if (authType == AuthLogin) authLogin();
else authCramMD5(line.mid(4));
break;
case AuthSent:
if (code[0] == '2')
{
state = Authenticated;
emit qxt_p().authenticated();
}
else
{
state = Disconnected;
emit qxt_p().authenticationFailed();
emit qxt_p().authenticationFailed( line );
emit socket->disconnectFromHost();
}
break;
case MailToSent:
case RcptAckPending:
if (code[0] != '2') {
emit qxt_p().mailFailed( pending.first().first, code.toInt() );
emit qxt_p().mailFailed(pending.first().first, code.toInt(), line);
// pending.removeFirst();
// DO NOT remove it, the body sent state needs this message to assigned the next mail failed message that will
// the sendNext
// a reset will be sent to clear things out
sendNext();
state = BodySent;
}
else
sendNextRcpt(code, line);
break;
case SendingBody:
sendBody(code, line);
break;
case BodySent:
if ( pending.count() )
{
// if you removeFirst in RcpActpending/MailToSent on an error, and the queue is now empty,
// you will get into this state and then crash because no check is done. CHeck added but shouldnt
// be necessary since I commented out the removeFirst
if (code[0] != '2')
{
emit qxt_p().mailFailed(pending.first().first, code.toInt() );
emit qxt_p().mailFailed(pending.first().first, code.toInt(), line);
}
else
emit qxt_p().mailSent(pending.first().first);
pending.removeFirst();
}
sendNext();
break;
case Resetting:
if (code[0] != '2') {
emit qxt_p().connectionFailed();
emit qxt_p().connectionFailed( line );
}
else {
state = Waiting;
sendNext();
}
break;
}
}
}
void Smtp::readyRead()
{
qDebug() << Q_FUNC_INFO;
// SMTP is line-oriented
buffer += socket->readAll();
while (true)
{
int pos = buffer.indexOf("\r\n");
if (pos < 0) return; // Loop exit condition
QByteArray line = buffer.left(pos);
buffer = buffer.mid(pos + 2);
qDebug() << "Response line:" << line;
// Extract reponse code
QByteArray code = line.left(3);
switch(state) {
case Init: {
if (code[0] == '2') {
// Connection was successful
ehlo();
} else {
logError("Connection failed, unrecognized reply: "+line);
state = Close;
}
break;
}
case EhloSent:
case HeloSent:
case EhloGreetReceived:
parseEhloResponse(code, line[3] != ' ', line.mid(4));
break;
#ifndef QT_NO_OPENSSL
case StartTLSSent:
if (code == "220") {
socket->startClientEncryption();
ehlo();
} else {
authenticate();
}
break;
#endif
case AuthRequestSent:
case AuthUsernameSent:
if (authType == AuthPlain) authPlain();
else if (authType == AuthLogin) authLogin();
else authCramMD5(line.mid(4));
break;
case AuthSent:
case Authenticated:
if (code[0] == '2') {
qDebug() << "Sending <mail from>...";
socket->write("mail from:<" + from.toLatin1() + ">\r\n");
socket->flush();
state = Rcpt;
} else {
// Authentication failed!
logError("Authentication failed, msg: "+line);
state = Close;
}
break;
case Rcpt:
if (code[0] == '2') {
socket->write("rcpt to:<" + rcpt.toLatin1() + ">\r\n");
socket->flush();
state = Data;
} else {
logError("<mail from> was rejected by server, msg: "+line);
state = Close;
}
break;
case Data:
if (code[0] == '2') {
socket->write("data\r\n");
socket->flush();
state = Body;
} else {
logError("<Rcpt to> was rejected by server, msg: "+line);
state = Close;
}
break;
case Body:
if (code[0] == '3') {
socket->write(message + "\r\n.\r\n");
socket->flush();
state = Quit;
} else {
logError("<data> was rejected by server, msg: "+line);
state = Close;
}
break;
case Quit:
if (code[0] == '2') {
socket->write("QUIT\r\n");
socket->flush();
// here, we just close.
state = Close;
} else {
logError("Message was rejected by the server, error: "+line);
state = Close;
}
break;
default:
qDebug() << "Disconnecting from host";
socket->disconnectFromHost();
return;
}
}
}
