From 1b8b41789a6f5ddb424c8cb93986a8908edc55bb Mon Sep 17 00:00:00 2001
From: Lev Stipakov <lev@openvpn.net>
Date: Fri, 6 Oct 2023 17:32:55 +0200
Subject: [PATCH] Implement OVPN_IOCTL_GET_VERSION

This allows client to get the driver version.

Bump version to 1.0.0

Signed-off-by: Lev Stipakov <lev@openvpn.net>
---
 Driver.cpp          | 24 ++++++++++++++++++++++++
 PropertySheet.props |  6 +++---
 uapi/ovpn-dco.h     |  7 +++++++
 3 files changed, 34 insertions(+), 3 deletions(-)

diff --git a/Driver.cpp b/Driver.cpp
index 404d4f3..6462f1e 100644
--- a/Driver.cpp
+++ b/Driver.cpp
@@ -212,6 +212,26 @@ OvpnEvtIoWrite(WDFQUEUE queue, WDFREQUEST request, size_t length)
     ExReleaseSpinLockShared(&device->SpinLock, kiqrl);
 }
 
+NTSTATUS
+OvpnGetVersion(WDFREQUEST request, _Out_ ULONG_PTR* bytesReturned)
+{
+    *bytesReturned = 0;
+
+    NTSTATUS status;
+    POVPN_VERSION version = NULL;
+    GOTO_IF_NOT_NT_SUCCESS(done, status, WdfRequestRetrieveOutputBuffer(request, sizeof(OVPN_VERSION), (PVOID*)&version, NULL));
+
+    version->Major = OVPN_DCO_VERSION_MAJOR;
+    version->Minor = OVPN_DCO_VERSION_MINOR;
+    version->Patch = OVPN_DCO_VERSION_PATCH;
+
+    *bytesReturned = sizeof(OVPN_VERSION);
+
+done:
+    return status;
+}
+
+
 EVT_WDF_IO_QUEUE_IO_DEVICE_CONTROL OvpnEvtIoDeviceControl;
 
 _Use_decl_annotations_
@@ -264,6 +284,10 @@ OvpnEvtIoDeviceControl(WDFQUEUE queue, WDFREQUEST request, size_t outputBufferLe
         ExReleaseSpinLockExclusive(&device->SpinLock, kirql);
         break;
 
+    case OVPN_IOCTL_GET_VERSION:
+        status = OvpnGetVersion(request, &bytesReturned);
+        break;
+
     default:
         LOG_WARN("Unknown <ioControlCode>", TraceLoggingValue(ioControlCode, "ioControlCode"));
         status = STATUS_INVALID_DEVICE_REQUEST;
diff --git a/PropertySheet.props b/PropertySheet.props
index a12508d..986dfd5 100644
--- a/PropertySheet.props
+++ b/PropertySheet.props
@@ -2,9 +2,9 @@
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <ImportGroup Label="PropertySheets" />
   <PropertyGroup Label="UserMacros">
-    <OVPN_DCO_VERSION_MAJOR>0</OVPN_DCO_VERSION_MAJOR>
-    <OVPN_DCO_VERSION_MINOR>9</OVPN_DCO_VERSION_MINOR>
-    <OVPN_DCO_VERSION_PATCH>4</OVPN_DCO_VERSION_PATCH>
+    <OVPN_DCO_VERSION_MAJOR>1</OVPN_DCO_VERSION_MAJOR>
+    <OVPN_DCO_VERSION_MINOR>0</OVPN_DCO_VERSION_MINOR>
+    <OVPN_DCO_VERSION_PATCH>0</OVPN_DCO_VERSION_PATCH>
   </PropertyGroup>
   <PropertyGroup />
   <ItemDefinitionGroup>
diff --git a/uapi/ovpn-dco.h b/uapi/ovpn-dco.h
index cbbdf92..ea2a733 100644
--- a/uapi/ovpn-dco.h
+++ b/uapi/ovpn-dco.h
@@ -100,6 +100,12 @@ typedef struct _OVPN_SET_PEER {
 	LONG MSS;
 } OVPN_SET_PEER, * POVPN_SET_PEER;
 
+typedef struct _OVPN_VERSION {
+    LONG Major;
+    LONG Minor;
+    LONG Patch;
+} OVPN_VERSION, * POVPN_VERSION;
+
 #define OVPN_IOCTL_NEW_PEER     CTL_CODE(FILE_DEVICE_UNKNOWN, 1, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define OVPN_IOCTL_GET_STATS    CTL_CODE(FILE_DEVICE_UNKNOWN, 2, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define OVPN_IOCTL_NEW_KEY      CTL_CODE(FILE_DEVICE_UNKNOWN, 3, METHOD_BUFFERED, FILE_ANY_ACCESS)
@@ -107,3 +113,4 @@ typedef struct _OVPN_SET_PEER {
 #define OVPN_IOCTL_SET_PEER     CTL_CODE(FILE_DEVICE_UNKNOWN, 5, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define OVPN_IOCTL_START_VPN    CTL_CODE(FILE_DEVICE_UNKNOWN, 6, METHOD_BUFFERED, FILE_ANY_ACCESS)
 #define OVPN_IOCTL_DEL_PEER     CTL_CODE(FILE_DEVICE_UNKNOWN, 7, METHOD_BUFFERED, FILE_ANY_ACCESS)
+#define OVPN_IOCTL_GET_VERSION  CTL_CODE(FILE_DEVICE_UNKNOWN, 8, METHOD_BUFFERED, FILE_ANY_ACCESS)