Add some ctypes generation + Improve RPCClient error message & error code parsing

.github/workflows/tests.yml

@@ -16,6 +16,8 @@ jobs:
             python-version: '3.11'
         - run:
             py .\ctypes_generation\generate.py
+        - name: Check generated code can execute
+          run: py -c "import windows.generated_def"
   tests:
     # Not a real dependency : but starting tests when ctypes generation is broken is not useful
     needs: generate_ctypes

ctypes_generation/definitions/defines/error_helper.txt

@@ -2,4 +2,22 @@
 #define ERROR_SEVERITY_SUCCESS       0x00000000
 #define ERROR_SEVERITY_INFORMATIONAL 0x40000000
 #define ERROR_SEVERITY_WARNING       0x80000000
-#define ERROR_SEVERITY_ERROR         0xC0000000
+#define ERROR_SEVERITY_ERROR         0xC0000000
+
+// https://learn.microsoft.com/en-us/windows/win32/com/structure-of-com-error-codes
+// Define the facility codes
+//
+#define FACILITY_WINDOWS                 0x8
+#define FACILITY_WIN32                   0x7
+#define FACILITY_STORAGE                 0x3
+#define FACILITY_RPC                     0x1
+#define FACILITY_NULL                    0x0
+#define FACILITY_ITF                     0x4
+#define FACILITY_DISPATCH                0x2
+
+
+//
+// Define the severity codes
+//
+#define STATUS_SEVERITY_SUCCESS          0x0
+#define STATUS_SEVERITY_COERROR          0x2

ctypes_generation/definitions/defines/template.py

@@ -17,3 +17,10 @@
 
 def CTL_CODE(DeviceType, Function, Method, Access):
     return (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method))
+
+# https://learn.microsoft.com/en-us/windows/win32/api/winerror/nf-winerror-hresult_facility
+# Original MACRO:
+#   #define HRESULT_FACILITY(hr)  (((hr) >> 16) & 0x1fff)
+
+def HRESULT_FACILITY(hr):
+    return (((hr) >> 16) & 0x1fff)

tests/test_generated_def.py

@@ -113,6 +113,12 @@ def test_CTL_CODE_macro():
     assert gdef.IOCTL_MOUNTMGR_CREATE_POINT == 0x006DC000
     assert gdef.IOCTL_MOUNTMGR_QUERY_POINTS == 0x006D0008
 
+def test_HRESULT_FACILITY_macro():
+    """Test that the HRESULT_FACILITY() macro, (reimplemented in python in windef.py) returns the correct values"""
+    assert gdef.HRESULT_FACILITY(0x800706d1) == gdef.FACILITY_WIN32 == 7
+    # RPC_E_INVALID_HEADER(0x80010111)
+    assert gdef.HRESULT_FACILITY(gdef.RPC_E_INVALID_HEADER) == gdef.FACILITY_RPC == 1
+
 
 # typedef struct _DnsRecordFlags
 # {

windows/generated_def/meta.py

@@ -1158,6 +1158,13 @@
 'EXIT_THREAD_DEBUG_EVENT',
 'EXPORT_PRIVATE_KEYS',
 'EXTENDED_STARTUPINFO_PRESENT',
+'FACILITY_DISPATCH',
+'FACILITY_ITF',
+'FACILITY_NULL',
+'FACILITY_RPC',
+'FACILITY_STORAGE',
+'FACILITY_WIN32',
+'FACILITY_WINDOWS',
 'FAILED_ACCESS_ACE_FLAG',
 'FAX_CONFIG_QUERY',
 'FAX_CONFIG_SET',
@@ -3006,6 +3013,8 @@
 'STARTF_USESHOWWINDOW',
 'STARTF_USESIZE',
 'STARTF_USESTDHANDLES',
+'STATUS_SEVERITY_COERROR',
+'STATUS_SEVERITY_SUCCESS',
 'STD_ERROR_HANDLE',
 'STD_INPUT_HANDLE',
 'STD_OUTPUT_HANDLE',

windows/generated_def/windef.py

@@ -17,6 +17,13 @@
 
 def CTL_CODE(DeviceType, Function, Method, Access):
     return (((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method))
+
+# https://learn.microsoft.com/en-us/windows/win32/api/winerror/nf-winerror-hresult_facility
+# Original MACRO:
+#   #define HRESULT_FACILITY(hr)  (((hr) >> 16) & 0x1fff)
+
+def HRESULT_FACILITY(hr):
+    return (((hr) >> 16) & 0x1fff)
 from .ntstatus import *
 from .winerror import *
 BG_JOB_ENUM_ALL_USERS = make_flag("BG_JOB_ENUM_ALL_USERS", 0x0001)
@@ -516,6 +523,15 @@ def CTL_CODE(DeviceType, Function, Method, Access):
 ERROR_SEVERITY_INFORMATIONAL = make_flag("ERROR_SEVERITY_INFORMATIONAL", 0x40000000)
 ERROR_SEVERITY_WARNING = make_flag("ERROR_SEVERITY_WARNING", 0x80000000)
 ERROR_SEVERITY_ERROR = make_flag("ERROR_SEVERITY_ERROR", 0xC0000000)
+FACILITY_WINDOWS = make_flag("FACILITY_WINDOWS", 0x8)
+FACILITY_WIN32 = make_flag("FACILITY_WIN32", 0x7)
+FACILITY_STORAGE = make_flag("FACILITY_STORAGE", 0x3)
+FACILITY_RPC = make_flag("FACILITY_RPC", 0x1)
+FACILITY_NULL = make_flag("FACILITY_NULL", 0x0)
+FACILITY_ITF = make_flag("FACILITY_ITF", 0x4)
+FACILITY_DISPATCH = make_flag("FACILITY_DISPATCH", 0x2)
+STATUS_SEVERITY_SUCCESS = make_flag("STATUS_SEVERITY_SUCCESS", 0x0)
+STATUS_SEVERITY_COERROR = make_flag("STATUS_SEVERITY_COERROR", 0x2)
 EVENT_TRACE_FLAG_DISPATCHER = make_flag("EVENT_TRACE_FLAG_DISPATCHER", 0x00000800)
 EVENT_TRACE_FLAG_VIRTUAL_ALLOC = make_flag("EVENT_TRACE_FLAG_VIRTUAL_ALLOC", 0x00004000)
 EVENT_TRACE_FLAG_VAMAP = make_flag("EVENT_TRACE_FLAG_VAMAP", 0x00008000)

windows/rpc/client.py

@@ -205,8 +205,11 @@ def _get_request_type(self, response):
         "raise if request_type == RESPONSE_TYPE_FAIL"
         request_type = struct.unpack("<I", response.data[:4])[0]
         if request_type == gdef.RPC_RESPONSE_TYPE_FAIL:
-            error_code = struct.unpack("<5I", response.data)[2]
-            raise ValueError("RPC Response error {0} ({1!r})".format(error_code, KNOWN_RPC_ERROR_CODE.get(error_code, error_code)))
+            effective_error_code = error_code = struct.unpack("<5I", response.data)[2]
+            # https://learn.microsoft.com/en-us/windows/win32/com/structure-of-com-error-codes
+            if gdef.HRESULT_FACILITY(error_code) == gdef.FACILITY_WIN32:
+                effective_error_code = effective_error_code & 0xffff
+            raise ValueError("RPC Response error {0:#x} ({1!r})".format(error_code, KNOWN_RPC_ERROR_CODE[effective_error_code]))
         return request_type
 
     def _get_response_effective_data(self, response):