1 files changed, 102 insertions, 0 deletions
diff --git a/network/netadaptercx/netvadapterlibrary/code/configuration.cpp b/network/netadaptercx/netvadapterlibrary/code/configuration.cpp
new file mode 100644
index 00000000..7482ef84
--- /dev/null
+++ b/network/netadaptercx/netvadapterlibrary/code/configuration.cpp
@@ -0,0 +1,102 @@
+#include "pch.hpp"
+#include "netvadapter.h"
+
+#include "trace.h"
+#include "configuration.tmh"
+
+typedef struct _NETVADAPTER_ADVANCED_PROPERTY
+{
+    UNICODE_STRING RegName;  // variable name text
+    UINT32 FieldOffset;     // offset to NetvAdapter field
+    UINT32 FieldSize;       // size (in bytes) of the field
+    UINT32 Default;         // default value to use
+    UINT32 Min;             // minimum value allowed
+    UINT32 Max;             // maximum value allowed
+} NETVADAPTER_ADVANCED_PROPERTY;
+
+#define NETV_OFFSET(field)   ((UINT32)FIELD_OFFSET(NetvAdapter,field))
+#define NETV_SIZE(field)     RTL_FIELD_SIZE(NetvAdapter,field)
+
+#define CONSTANT_UNICODE_STRING(s) {sizeof( s ) - sizeof( WCHAR ), sizeof( s ), s }
+
+NETVADAPTER_ADVANCED_PROPERTY NetvSupportedProperties[] =
+{
+    // reg value name - Offset in NetvAdapter - Field size - Default Value - Min - Max
+
+    // Standard Keywords
+    { CONSTANT_UNICODE_STRING(L"MACLastByte"), NETV_OFFSET(MACLastByte), NETV_SIZE(MACLastByte), 0, 0, 254 },
+    { CONSTANT_UNICODE_STRING(L"LinkProcIndex"), NETV_OFFSET(LinkProcIndex), NETV_SIZE(LinkProcIndex), 1000, 0, 1023 },
+    { CONSTANT_UNICODE_STRING(L"S0Idle"), NETV_OFFSET(S0Idle), NETV_SIZE(S0Idle), 0, 0, 1 },
+    { CONSTANT_UNICODE_STRING(L"EnableUsoUro"), NETV_OFFSET(EnableUsoUro), NETV_SIZE(EnableUsoUro), 0, 0, 1 },
+};
+
+NTSTATUS
+NetvAdapterReadConfiguration(
+    NetvAdapter *Adapter,
+    WDFDEVICE Device
+    )
+{
+    NTSTATUS status = STATUS_SUCCESS;
+
+    NETCONFIGURATION configuration;
+    RETURN_IF_NOT_STATUS_SUCCESS(
+        NetDeviceOpenConfiguration(Device, WDF_NO_OBJECT_ATTRIBUTES, &configuration));
+
+    // read all the registry values
+    for (auto &property : NetvSupportedProperties)
+    {
+        // Driver should NOT fail the initialization only because it can not
+        // read the registry
+        auto pointer = (PUCHAR)Adapter + property.FieldOffset;
+
+        // Get the configuration value for a specific parameter.  Under NT the
+        // parameters are all read in as DWORDs.
+        ULONG value = 0;
+        
+        status = NetConfigurationQueryUlong(
+            configuration,
+            NET_CONFIGURATION_QUERY_ULONG_NO_FLAGS,
+            &property.RegName,
+            &value);
+
+        // Store the value in the adapter structure.
+        switch (property.FieldSize)
+        {
+            case 1:
+                *((PUCHAR)pointer) = (UCHAR)value;
+                break;
+
+            case 2:
+                *((PUSHORT)pointer) = (USHORT)value;
+                break;
+
+            case 4:
+                *((PULONG)pointer) = (ULONG)value;
+                break;
+
+            default:
+                break;
+        }
+
+        // If the parameter was present, then check its value for validity.
+        if (NT_SUCCESS(status))
+        {
+            // Check that param value is not too small or too large
+
+            if (value < property.Min ||
+                value > property.Max)
+            {
+                value = property.Default;
+            }
+        }
+        else
+        {
+            value = property.Default;
+            status = STATUS_SUCCESS;
+        }
+    }
+
+    NetConfigurationClose(configuration);
+
+    RETURN_STATUS_SUCCESS();
+}