Parse unsupported-attributes group

src/pyipp/ipp.py

@@ -161,7 +161,7 @@ def _build_printer_uri(self) -> str:
             scheme=scheme, host=self.host, port=self.port, path=self.base_path
         ).human_repr()
 
-    def _message(self, operation: IppOperation, msg: dict) -> dict:
+    def _message(self, operation: IppOperation, msg: dict[str, Any]) -> dict[str, Any]:
         """Build a request message to be sent to the server."""
         base = {
             "version": DEFAULT_PROTO_VERSION,
@@ -175,12 +175,11 @@ def _message(self, operation: IppOperation, msg: dict) -> dict:
             },
         }
 
-        if msg is not dict:
-            msg = {}
-
         return always_merger.merge(base, msg)
 
-    async def execute(self, operation: IppOperation, message: dict) -> dict:
+    async def execute(
+        self, operation: IppOperation, message: dict[str, Any]
+    ) -> dict[str, Any]:
         """Send a request message to the server."""
         message = self._message(operation, message)
         response = await self._request(data=message)
@@ -201,7 +200,7 @@ async def execute(self, operation: IppOperation, message: dict) -> dict:
 
         return parsed
 
-    async def raw(self, operation: IppOperation, message: dict) -> bytes:
+    async def raw(self, operation: IppOperation, message: dict[str, Any]) -> bytes:
         """Send a request message to the server and return raw response."""
         message = self._message(operation, message)
 

src/pyipp/parser.py

@@ -169,6 +169,7 @@ def parse(raw_data: bytes, contains_data=False):
     offset += 4
 
     data["operation-attributes"] = []
+    data["unsupported-attributes"] = []
     data["jobs"] = []
     data["printers"] = []
     data["data"] = b""
@@ -202,6 +203,16 @@ def parse(raw_data: bytes, contains_data=False):
 
             attribute_key = "printers"
             offset += 1
+        elif (
+            struct.unpack_from("b", raw_data, offset)[0]
+            == IppTag.UNSUPPORTED_GROUP.value
+        ):
+            if tmp_data and attribute_key:
+                data[attribute_key].append(tmp_data)
+                tmp_data = {}
+
+            attribute_key = "unsupported-attributes"
+            offset += 1
 
         attribute, new_offset = parse_attribute(raw_data, offset)
 

tests/test_parser.py

@@ -27,6 +27,7 @@ def test_parse() -> None:
         "printers": [],
         "request-id": 1,
         "status-code": IppOperation.GET_PRINTER_ATTRIBUTES,
+        "unsupported-attributes": [],
         "version": DEFAULT_PROTO_VERSION,
     }