network examples: unify the fortune server/client examples

always use the first non-localhost IP address to listen/connect to, if
there is one.

Reviewed-by: Markus Goetz

1 files changed, 16 insertions, 1 deletions

diff --git a/examples/network/blockingfortuneclient/blockingclient.cpp b/examples/network/blockingfortuneclient/blockingclient.cpp
index b731f7a..a3d7c23 100644
--- a/examples/network/blockingfortuneclient/blockingclient.cpp
+++ b/examples/network/blockingfortuneclient/blockingclient.cpp
@@ -50,7 +50,22 @@ BlockingClient::BlockingClient(QWidget *parent)
     hostLabel = new QLabel(tr("&Server name:"));
     portLabel = new QLabel(tr("S&erver port:"));
 
-    hostLineEdit = new QLineEdit("Localhost");
+    // find out which IP to connect to
+    QString ipAddress;
+    QList<QHostAddress> ipAddressesList = QNetworkInterface::allAddresses();
+    // use the first non-localhost IPv4 address
+    for (int i = 0; i < ipAddressesList.size(); ++i) {
+        if (ipAddressesList.at(i) != QHostAddress::LocalHost &&
+            ipAddressesList.at(i).toIPv4Address()) {
+            ipAddress = ipAddressesList.at(i).toString();
+            break;
+        }
+    }
+    // if we did not find one, use IPv4 localhost
+    if (ipAddress.isEmpty())
+        ipAddress = QHostAddress(QHostAddress::LocalHost).toString();
+
+    hostLineEdit = new QLineEdit(ipAddress);
     portLineEdit = new QLineEdit;
     portLineEdit->setValidator(new QIntValidator(1, 65535, this));