def nodeid_from_binary(data):
encoding = ord(data.read(1))
nidtype = ua.NodeIdType(encoding & 0b00111111)
uri = None
server_idx = None
if nidtype == ua.NodeIdType.TwoByte:
identifier = ord(data.read(1))
nidx = 0
elif nidtype == ua.NodeIdType.FourByte:
nidx, identifier = struct.unpack("<BH", data.read(3))
elif nidtype == ua.NodeIdType.Numeric:
nidx, identifier = struct.unpack("<HI", data.read(6))
elif nidtype == ua.NodeIdType.String:
nidx = Primitives.UInt16.unpack(data)
identifier = Primitives.String.unpack(data)
elif nidtype == ua.NodeIdType.ByteString:
nidx = Primitives.UInt16.unpack(data)
identifier = Primitives.Bytes.unpack(data)
elif nidtype == ua.NodeIdType.Guid:
nidx = Primitives.UInt16.unpack(data)
identifier = Primitives.Guid.unpack(data)
else:
raise UaError(f'Unknown NodeId encoding: {nidtype}')
if test_bit(encoding, 7):
uri = Primitives.String.unpack(data)
if test_bit(encoding, 6):
server_idx = Primitives.UInt32.unpack(data)
if uri is not None or server_idx is not None:
return ua.ExpandedNodeId(identifier, nidx, nidtype, uri, server_idx)
return ua.NodeId(identifier, nidx, nidtype)
def nodeid_from_binary(data):
nid = ua.NodeId()
encoding = ord(data.read(1))
nid.NodeIdType = ua.NodeIdType(encoding & 0b00111111)
if nid.NodeIdType == ua.NodeIdType.TwoByte:
nid.Identifier = ord(data.read(1))
elif nid.NodeIdType == ua.NodeIdType.FourByte:
nid.NamespaceIndex, nid.Identifier = struct.unpack("<BH", data.read(3))
elif nid.NodeIdType == ua.NodeIdType.Numeric:
nid.NamespaceIndex, nid.Identifier = struct.unpack("<HI", data.read(6))
elif nid.NodeIdType == ua.NodeIdType.String:
nid.NamespaceIndex = Primitives.UInt16.unpack(data)
nid.Identifier = Primitives.String.unpack(data)
elif nid.NodeIdType == ua.NodeIdType.ByteString:
nid.NamespaceIndex = Primitives.UInt16.unpack(data)
nid.Identifier = Primitives.Bytes.unpack(data)
elif nid.NodeIdType == ua.NodeIdType.Guid:
nid.NamespaceIndex = Primitives.UInt16.unpack(data)
nid.Identifier = Primitives.Guid.unpack(data)
else:
raise UaError(f'Unknown NodeId encoding: {nid.NodeIdType}')
if test_bit(encoding, 7):
nid.NamespaceUri = Primitives.String.unpack(data)
if test_bit(encoding, 6):
nid.ServerIndex = Primitives.UInt32.unpack(data)
return nid
