Add QCanBusDevice::busStatus()

The original terminology is Error active, Error warning,
Error Passive and Bus Off. We map them to GoodStatus,
WarningStatus, ErrorStatus and BusOffStatus here.

[ChangeLog][QCanBusDevice] Added the function busStatus()
to query the CAN bus status from the CAN bus device.

Fixes: QTBUG-70766
Change-Id: I22b99e2a02a6b22509005dd177796b861d536281
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/plugins/canbus/socketcan/socketcanbackend.cpp b/src/plugins/canbus/socketcan/socketcanbackend.cpp
index 9e99a57..7d0fc52 100644
--- a/src/plugins/canbus/socketcan/socketcanbackend.cpp
+++ b/src/plugins/canbus/socketcan/socketcanbackend.cpp
@@ -197,6 +197,13 @@ SocketCanBackend::SocketCanBackend(const QString &name) :
 
     std::function<void()> f = std::bind(&SocketCanBackend::resetController, this);
     setResetControllerFunction(f);
+
+    if (hasBusStatus()) {
+        // Only register busStatus when libsocketcan is available
+        // QCanBusDevice::hasBusStatus() will return false otherwise
+        std::function<CanBusStatus()> g = std::bind(&SocketCanBackend::busStatus, this);
+        setCanBusStatusGetter(g);
+    }
 }
 
 SocketCanBackend::~SocketCanBackend()
@@ -758,4 +765,14 @@ void SocketCanBackend::resetController()
     libSocketCan->restart(canSocketName);
 }
 
+bool SocketCanBackend::hasBusStatus() const
+{
+    return libSocketCan->hasBusStatus();
+}
+
+QCanBusDevice::CanBusStatus SocketCanBackend::busStatus() const
+{
+    return libSocketCan->busStatus(canSocketName);
+}
+
 QT_END_NAMESPACE