QNativeSocketEngine: Fix some error handling related to waitFor*()

Task: QTBUG-7054
Reviewed-by: Peter Hartmann
(cherry picked from commit 8aaa61f8ea11c6e5794b5a3f6bf14bbbcb712074)

2 files changed, 31 insertions, 0 deletions

diff --git a/src/network/socket/qnativesocketengine.cpp b/src/network/socket/qnativesocketengine.cpp
index 2a165c5..717f483 100644
--- a/src/network/socket/qnativesocketengine.cpp
+++ b/src/network/socket/qnativesocketengine.cpp
@@ -185,6 +185,9 @@ void QNativeSocketEnginePrivate::setError(QAbstractSocket::SocketError error, Er
         // socket to recreate its engine after an error. Note: There's
         // one exception: SocketError(11) bypasses this as it's purely
         // a temporary internal error condition.
+        // Another exception is the way the waitFor*() functions set
+        // an error when a timeout occurs. After the call to setError()
+        // they reset the hasSetSocketError to false
         return;
     }
     if (error != QAbstractSocket::SocketError(11))
@@ -859,6 +862,7 @@ bool QNativeSocketEngine::waitForRead(int msecs, bool *timedOut)
             *timedOut = true;
         d->setError(QAbstractSocket::SocketTimeoutError,
             QNativeSocketEnginePrivate::TimeOutErrorString);
+        d->hasSetSocketError = false; // A timeout error is temporary in waitFor functions
         return false;
     } else if (state() == QAbstractSocket::ConnectingState) {
         connectToHost(d->peerAddress, d->peerPort);
@@ -927,6 +931,7 @@ bool QNativeSocketEngine::waitForWrite(int msecs, bool *timedOut)
             *timedOut = true;
         d->setError(QAbstractSocket::SocketTimeoutError,
                     QNativeSocketEnginePrivate::TimeOutErrorString);
+        d->hasSetSocketError = false; // A timeout error is temporary in waitFor functions
         return false;
     } else if (state() == QAbstractSocket::ConnectingState) {
         connectToHost(d->peerAddress, d->peerPort);
@@ -978,6 +983,7 @@ bool QNativeSocketEngine::waitForReadOrWrite(bool *readyToRead, bool *readyToWri
             *timedOut = true;
         d->setError(QAbstractSocket::SocketTimeoutError,
                     QNativeSocketEnginePrivate::TimeOutErrorString);
+        d->hasSetSocketError = false; // A timeout error is temporary in waitFor functions
         return false;
     } else if (state() == QAbstractSocket::ConnectingState) {
         connectToHost(d->peerAddress, d->peerPort);
diff --git a/tests/auto/qtcpsocket/tst_qtcpsocket.cpp b/tests/auto/qtcpsocket/tst_qtcpsocket.cpp
index 41acf08..9644152 100644
--- a/tests/auto/qtcpsocket/tst_qtcpsocket.cpp
+++ b/tests/auto/qtcpsocket/tst_qtcpsocket.cpp
@@ -193,6 +193,7 @@ private slots:
     void increaseReadBufferSize();
     void taskQtBug5799ConnectionErrorWaitForConnected();
     void taskQtBug5799ConnectionErrorEventLoop();
+    void taskQtBug7054TimeoutErrorResetting();
 
     void invalidProxy_data();
     void invalidProxy();
@@ -2245,6 +2246,30 @@ void tst_QTcpSocket::taskQtBug5799ConnectionErrorEventLoop()
              QString("Could not reach server: %1").arg(socket.errorString()).toLocal8Bit());
 }
 
+void tst_QTcpSocket::taskQtBug7054TimeoutErrorResetting()
+{
+    QTcpSocket *socket = newSocket();
+
+    socket->connectToHost(QtNetworkSettings::serverName(), 443);
+    QVERIFY(socket->waitForConnected(5*1000));
+    QVERIFY(socket->error() == QAbstractSocket::UnknownSocketError);
+
+    // We connected to the HTTPS port. Wait two seconds to receive data. We will receive
+    // nothing because we would need to start the SSL handshake
+    QVERIFY(!socket->waitForReadyRead(2*1000));
+    QVERIFY(socket->error() == QAbstractSocket::SocketTimeoutError);
+
+    // Now write some crap to make the server disconnect us. 4 lines are enough.
+    socket->write("a\r\nb\r\nc\r\nd\r\n");
+    socket->waitForBytesWritten(2*1000);
+
+    // we try to waitForReadyRead another time, but this time instead of a timeout we
+    // should get a better error since the server disconnected us
+    QVERIFY(!socket->waitForReadyRead(2*1000));
+    // It must NOT be the SocketTimeoutError that had been set before
+    QVERIFY(socket->error() == QAbstractSocket::RemoteHostClosedError);
+}
+
 void tst_QTcpSocket::invalidProxy_data()
 {
     QTest::addColumn<int>("type");