auracaster/bumble_mirror
3
0
Fork 1
mirror of https://github.com/google/bumble.git synced 2026-05-08 03:58:01 +00:00
Code Issues Packages Projects Releases Wiki Activity

Fix UUID byte-order in serialization

Browse Source
This commit is contained in:
Rahul Arya
2023-03-01 18:44:47 -08:00
committed by Rahul Arya
parent e7b39c4188
commit c97ba4319f
1 changed files with 16 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

22
bumble/core.py
View File

@@ -144,9 +144,12 @@ class ConnectionError(BaseError): # pylint: disable=redefined-builtin
class UUID:
'''
See Bluetooth spec Vol 3, Part B - 2.5.1 UUID
Note that this class expects and works in little-endian byte-order throughout.
The exception is when interacting with strings, which are in big-endian byte-order.
'''
BASE_UUID = bytes.fromhex('00001000800000805F9B34FB')
BASE_UUID = bytes.fromhex('00001000800000805F9B34FB')[::-1] # little-endian
UUIDS: List[UUID] = [] # Registry of all instances created
def __init__(self, uuid_str_or_int, name=None):
@@ -209,13 +212,20 @@ class UUID:
return offset + 2, cls.from_bytes(uuid_as_bytes[offset : offset + 2])
def to_bytes(self, force_128=False):
if len(self.uuid_bytes) == 16 or not force_128:
'''
Serialize UUID in little-endian byte-order
'''
if not force_128:
return self.uuid_bytes
if len(self.uuid_bytes) == 4:
return self.uuid_bytes + UUID.BASE_UUID
return self.uuid_bytes + bytes([0, 0]) + UUID.BASE_UUID
if len(self.uuid_bytes) == 2:
return self.BASE_UUID + self.uuid_bytes + bytes([0, 0])
elif len(self.uuid_bytes) == 4:
return self.BASE_UUID + self.uuid_bytes
elif len(self.uuid_bytes) == 16:
return self.uuid_bytes
else:
assert False, "unreachable"
def to_pdu_bytes(self):
'''