[Incomplete] Zeroconf feature

librespot/zeroconf/Packet.py

@@ -0,0 +1,59 @@
+import struct
+
+
+class Packet:
+    __FLAG_RESPONSE: int = 15
+    __FLAG_AA: int = 10
+    __questions: list
+    __answers: list
+    __authorities: list
+    __additionals: list
+    __id: int
+    __flags: int
+    __address: str
+
+    def __init__(self, _id: int):
+        self.__id = _id
+        self.__questions = []
+        self.__answers = []
+        self.__authorities = []
+        self.__additionals = []
+
+    def get_address(self) -> str:
+        return self.__address
+
+    def set_address(self, address: str) -> None:
+        self.__address = address
+
+    def get_id(self) -> int:
+        return self.__id
+
+    def is_response(self) -> bool:
+        return self.__is_flag(self.__FLAG_RESPONSE)
+
+    def set_response(self, on: bool) -> None:
+        self.__set_flag(self.__FLAG_RESPONSE, on)
+
+    def is_authoritative(self) -> bool:
+        return self.__is_flag(self.__FLAG_AA)
+
+    def set_authoritative(self, on: bool) -> None:
+        self.__set_flag(self.__FLAG_AA, on)
+
+    def __is_flag(self, flag: int):
+        return (self.__flags & (1 << flag)) != 0
+
+    def __set_flag(self, flag: int, on: bool):
+        if on:
+            self.__flags |= (1 << flag)
+        else:
+            self.__flags &= ~(1 << flag)
+
+    def read(self, inp: bytes, address: str):
+        self.__address = address
+        self.__id = struct.unpack("<h", inp[0:2])[0]
+        self.__flags = struct.unpack("<h", inp[2:4])[0]
+        num_questions = struct.unpack("<h", inp[4:6])[0]
+        num_answers = struct.unpack("<h", inp[6:8])[0]
+        num_authorities = struct.unpack("<h", inp[8:10])[0]
+        num_additionals = struct.unpack("<h", inp[10:12])[0]