Port QtWifi to eLinux

Current limitations:

- Wifi adapter must be connected before staring the device (and ethernet
  cable should not be connected at the same time).

  "allow-hotplug wlan0" in /etc/network/interfaces doesn't seem to help for
  detecting wifi adapter on-the-fly.

Change-Id: I8be407e9e042fc86136efd3e220680fb2ce64bd6
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@digia.com>

1 files changed, 7 insertions, 6 deletions

diff --git a/src/imports/wifi/qwifinetworklistmodel.cpp b/src/imports/wifi/qwifinetworklistmodel.cpp
index 4fbf25f..f95af36 100644
--- a/src/imports/wifi/qwifinetworklistmodel.cpp
+++ b/src/imports/wifi/qwifinetworklistmodel.cpp
@@ -88,14 +88,15 @@ void QWifiNetworkListModel::parseScanResults(const QByteArray &results)
         QWifiNetwork *knownNetwork = networkForSSID(info.at(4), &pos);
         if (!knownNetwork)
             knownNetwork = outOfRangeListContains(info.at(4));
-
+        // signal strength is in dBm. Deprecated, but still widely used "wext"
+        // wifi driver reports positive values for signal strength, we workaround that.
+        int signalStrength = qAbs(info.at(2).trimmed().toInt()) * -1;
         if (!knownNetwork) {
             QWifiNetwork *network = new QWifiNetwork();
             network->setOutOfRange(false);
             network->setBssid(info.at(0));
             network->setFlags(info.at(3));
-            // signal strength is in dBm
-            network->setSignalStrength(info.at(2).toInt());
+            network->setSignalStrength(signalStrength);
             network->setSsid(info.at(4));
             beginInsertRows(QModelIndex(), m_networks.size(), m_networks.size());
             m_networks << network;
@@ -112,15 +113,15 @@ void QWifiNetworkListModel::parseScanResults(const QByteArray &results)
             // ssids are the same, compare bssids..
             if (knownNetwork->bssid() == info.at(0)) {
                 // same access point, simply update the signal strength
-                knownNetwork->setSignalStrength(info.at(2).toInt());
+                knownNetwork->setSignalStrength(signalStrength);
                 knownNetwork->setOutOfRange(false);
                 dataChanged(createIndex(pos, 0), createIndex(pos, 0));
-            } else if (knownNetwork->signalStrength() < info.at(2).toInt()) {
+            } else if (knownNetwork->signalStrength() < signalStrength) {
                 // replace with a stronger access point within the same network
                 m_networks.at(pos)->setOutOfRange(false);
                 m_networks.at(pos)->setBssid(info.at(0));
                 m_networks.at(pos)->setFlags(info.at(3));
-                m_networks.at(pos)->setSignalStrength(info.at(2).toInt());
+                m_networks.at(pos)->setSignalStrength(signalStrength);
                 m_networks.at(pos)->setSsid(info.at(4));
                 dataChanged(createIndex(pos, 0), createIndex(pos, 0));
             }