dco-win: get driver version

Print dco-win driver version using the new ioctl.
Requires dco-win driver 1.0.0 or newer to work.

Change-Id: I1d0d909e7fca3f51b5c848f1a771a989ab040f17
Signed-off-by: Lev Stipakov <lev@openvpn.net>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Message-Id: <20231008112755.23568-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg27174.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

diff --git a/src/openvpn/dco_win.c b/src/openvpn/dco_win.c
index 53f1523d9ef69d72da176e1d22a4bd8e4f7f4374..a775c829f968e481619ca32292e79709353fc23d 100644 (file)
--- a/src/openvpn/dco_win.c
+++ b/src/openvpn/dco_win.c
@@ -386,7 +386,32 @@ dco_available(int msglevel)
 const char *
 dco_version_string(struct gc_arena *gc)
 {
-    return "v0";
+    OVPN_VERSION version;
+    ZeroMemory(&version, sizeof(OVPN_VERSION));
+
+    /* try to open device by symbolic name */
+    HANDLE h = CreateFile("\\\\.\\ovpn-dco", GENERIC_READ | GENERIC_WRITE,
+                          0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_SYSTEM | FILE_FLAG_OVERLAPPED, NULL);
+
+    if (h == INVALID_HANDLE_VALUE)
+    {
+        return "N/A";
+    }
+
+    DWORD bytes_returned = 0;
+    if (!DeviceIoControl(h, OVPN_IOCTL_GET_VERSION, NULL, 0,
+                         &version, sizeof(version), &bytes_returned, NULL))
+    {
+        CloseHandle(h);
+        return "N/A";
+    }
+
+    CloseHandle(h);
+
+    struct buffer out = alloc_buf_gc(256, gc);
+    buf_printf(&out, "%ld.%ld.%ld", version.Major, version.Minor, version.Patch);
+
+    return BSTR(&out);
 }
 
 int

diff --git a/src/openvpn/ovpn_dco_win.h b/src/openvpn/ovpn_dco_win.h
index cbbdf92e5b2cce0b147427705a134a23617f1833..ea2a733776c560d6bfe1d95cb289ce2a9fa5296e 100644 (file)
--- a/src/openvpn/ovpn_dco_win.h
+++ b/src/openvpn/ovpn_dco_win.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)