707 lines
21 KiB
Python
707 lines
21 KiB
Python
"""
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Uses coreapi_data for message and TLV types, and defines TLV data
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types and objects used for parsing and building CORE API messages.
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CORE API messaging is leveraged for communication with the GUI.
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"""
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import socket
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import struct
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from enum import Enum
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from core.enumerations import ConfigTlvs
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from core.enumerations import EventTlvs
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from core.enumerations import EventTypes
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from core.enumerations import ExceptionTlvs
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from core.enumerations import ExecuteTlvs
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from core.enumerations import FileTlvs
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from core.enumerations import InterfaceTlvs
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from core.enumerations import LinkTlvs
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from core.enumerations import MessageFlags
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from core.enumerations import MessageTypes
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from core.enumerations import NodeTlvs
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from core.enumerations import RegisterTlvs
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from core.enumerations import SessionTlvs
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from core.misc import log
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from core.misc.ipaddress import IpAddress
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from core.misc.ipaddress import MacAddress
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logger = log.get_logger(__name__)
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class CoreTlvData(object):
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"""
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Helper base class used for packing and unpacking values using struct.
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"""
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# format string for packing data
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data_format = None
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# python data type for the data
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data_type = None
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# pad length for data after packing
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pad_len = None
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@classmethod
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def pack(cls, value):
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data = struct.pack(cls.data_format, value)
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length = len(data) - cls.pad_len
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return length, data
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@classmethod
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def unpack(cls, data):
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return struct.unpack(cls.data_format, data)[0]
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@classmethod
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def pack_string(cls, value):
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return cls.pack(cls.from_string(value))
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@classmethod
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def from_string(cls, value):
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return cls.data_type(value)
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class CoreTlvDataObj(CoreTlvData):
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"""
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Helper class for packing custom object data.
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"""
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@classmethod
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def pack(cls, obj):
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data = struct.pack(cls.data_format, cls.get_value(obj))
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length = len(data) - cls.pad_len
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return length, data
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@classmethod
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def unpack(cls, data):
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return cls.new_obj(struct.unpack(cls.data_format, data)[0])
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@staticmethod
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def get_value(obj):
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raise NotImplementedError
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@staticmethod
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def new_obj(obj):
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raise NotImplementedError
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class CoreTlvDataUint16(CoreTlvData):
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"""
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Helper class for packing uint16 data.
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"""
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data_format = "!H"
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data_type = int
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pad_len = 0
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class CoreTlvDataUint32(CoreTlvData):
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"""
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Helper class for packing uint32 data.
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"""
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data_format = "!2xI"
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data_type = int
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pad_len = 2
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class CoreTlvDataUint64(CoreTlvData):
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"""
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Helper class for packing uint64 data.
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"""
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data_format = "!2xQ"
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data_type = long
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pad_len = 2
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class CoreTlvDataString(CoreTlvData):
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"""
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Helper class for packing string data.
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"""
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data_type = str
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@classmethod
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def pack(cls, value):
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if not isinstance(value, str):
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raise ValueError("value not a string: %s" % value)
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if len(value) < 256:
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header_len = CoreTlv.header_len
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else:
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header_len = CoreTlv.long_header_len
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pad_len = -(header_len + len(value)) % 4
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return len(value), value + '\0' * pad_len
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@classmethod
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def unpack(cls, data):
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return data.rstrip('\0')
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class CoreTlvDataUint16List(CoreTlvData):
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"""
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List of unsigned 16-bit values.
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"""
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data_type = tuple
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data_format = "!H"
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@classmethod
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def pack(cls, values):
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if not isinstance(values, tuple):
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raise ValueError("value not a tuple: %s" % values)
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data = ""
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for value in values:
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data += struct.pack(cls.data_format, value)
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pad_len = -(CoreTlv.header_len + len(data)) % 4
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return len(data), data + "\0" * pad_len
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@classmethod
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def unpack(cls, data):
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data_format = "!%dH" % (len(data) / 2)
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return struct.unpack(data_format, data)
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@classmethod
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def from_string(cls, value):
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return tuple(map(lambda (x): int(x), value.split()))
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class CoreTlvDataIpv4Addr(CoreTlvDataObj):
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data_type = IpAddress.from_string
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data_format = "!2x4s"
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pad_len = 2
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@staticmethod
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def get_value(obj):
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return obj.addr
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@staticmethod
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def new_obj(value):
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return IpAddress(af=socket.AF_INET, address=value)
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class CoreTlvDataIPv6Addr(CoreTlvDataObj):
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data_format = "!16s2x"
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data_type = IpAddress.from_string
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pad_len = 2
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@staticmethod
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def get_value(obj):
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return obj.addr
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@staticmethod
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def new_obj(value):
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return IpAddress(af=socket.AF_INET6, address=value)
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class CoreTlvDataMacAddr(CoreTlvDataObj):
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data_format = "!2x8s"
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data_type = MacAddress.from_string
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pad_len = 2
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@staticmethod
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def get_value(obj):
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# extend to 64 bits
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return '\0\0' + obj.addr
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@staticmethod
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def new_obj(value):
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# only use 48 bits
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return MacAddress(address=value[2:])
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class CoreTlv(object):
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header_format = "!BB"
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header_len = struct.calcsize(header_format)
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long_header_format = "!BBH"
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long_header_len = struct.calcsize(long_header_format)
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tlv_type_map = Enum
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tlv_data_class_map = {}
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def __init__(self, tlv_type, tlv_data):
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self.tlv_type = tlv_type
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if tlv_data:
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try:
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self.value = self.tlv_data_class_map[self.tlv_type].unpack(tlv_data)
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except KeyError:
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self.value = tlv_data
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else:
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self.value = None
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@classmethod
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def unpack(cls, data):
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"""
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parse data and return unpacked class.
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"""
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tlv_type, tlv_len = struct.unpack(cls.header_format, data[:cls.header_len])
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header_len = cls.header_len
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if tlv_len == 0:
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tlv_type, zero, tlv_len = struct.unpack(cls.long_header_format, data[:cls.long_header_len])
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header_len = cls.long_header_len
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tlv_size = header_len + tlv_len
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tlv_size += -tlv_size % 4 # for 32-bit alignment
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return cls(tlv_type, data[header_len:tlv_size]), data[tlv_size:]
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@classmethod
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def pack(cls, tlv_type, value):
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tlv_len, tlv_data = cls.tlv_data_class_map[tlv_type].pack(value)
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if tlv_len < 256:
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hdr = struct.pack(cls.header_format, tlv_type, tlv_len)
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else:
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hdr = struct.pack(cls.long_header_format, tlv_type, 0, tlv_len)
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return hdr + tlv_data
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@classmethod
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def pack_string(cls, tlv_type, value):
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return cls.pack(tlv_type, cls.tlv_data_class_map[tlv_type].from_string(value))
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def type_str(self):
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try:
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return self.tlv_type_map(self.tlv_type).name
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except ValueError:
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return "unknown tlv type: %s" % str(self.tlv_type)
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def __str__(self):
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return "%s <tlvtype = %s, value = %s>" % (self.__class__.__name__, self.type_str(), self.value)
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class CoreNodeTlv(CoreTlv):
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tlv_type_map = NodeTlvs
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tlv_data_class_map = {
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NodeTlvs.NUMBER.value: CoreTlvDataUint32,
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NodeTlvs.TYPE.value: CoreTlvDataUint32,
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NodeTlvs.NAME.value: CoreTlvDataString,
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NodeTlvs.IP_ADDRESS.value: CoreTlvDataIpv4Addr,
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NodeTlvs.MAC_ADDRESS.value: CoreTlvDataMacAddr,
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NodeTlvs.IP6_ADDRESS.value: CoreTlvDataIPv6Addr,
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NodeTlvs.MODEL.value: CoreTlvDataString,
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NodeTlvs.EMULATION_SERVER.value: CoreTlvDataString,
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NodeTlvs.SESSION.value: CoreTlvDataString,
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NodeTlvs.X_POSITION.value: CoreTlvDataUint16,
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NodeTlvs.Y_POSITION.value: CoreTlvDataUint16,
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NodeTlvs.CANVAS.value: CoreTlvDataUint16,
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NodeTlvs.EMULATION_ID.value: CoreTlvDataUint32,
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NodeTlvs.NETWORK_ID.value: CoreTlvDataUint32,
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NodeTlvs.SERVICES.value: CoreTlvDataString,
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NodeTlvs.LATITUDE.value: CoreTlvDataString,
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NodeTlvs.LONGITUDE.value: CoreTlvDataString,
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NodeTlvs.ALTITUDE.value: CoreTlvDataString,
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NodeTlvs.ICON.value: CoreTlvDataString,
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NodeTlvs.OPAQUE.value: CoreTlvDataString,
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}
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class CoreLinkTlv(CoreTlv):
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tlv_type_map = LinkTlvs
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tlv_data_class_map = {
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LinkTlvs.N1_NUMBER.value: CoreTlvDataUint32,
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LinkTlvs.N2_NUMBER.value: CoreTlvDataUint32,
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LinkTlvs.DELAY.value: CoreTlvDataUint64,
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LinkTlvs.BANDWIDTH.value: CoreTlvDataUint64,
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LinkTlvs.PER.value: CoreTlvDataString,
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LinkTlvs.DUP.value: CoreTlvDataString,
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LinkTlvs.JITTER.value: CoreTlvDataUint64,
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LinkTlvs.MER.value: CoreTlvDataUint16,
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LinkTlvs.BURST.value: CoreTlvDataUint16,
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LinkTlvs.SESSION.value: CoreTlvDataString,
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LinkTlvs.MBURST.value: CoreTlvDataUint16,
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LinkTlvs.TYPE.value: CoreTlvDataUint32,
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LinkTlvs.GUI_ATTRIBUTES.value: CoreTlvDataString,
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LinkTlvs.UNIDIRECTIONAL.value: CoreTlvDataUint16,
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LinkTlvs.EMULATION_ID.value: CoreTlvDataUint32,
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LinkTlvs.NETWORK_ID.value: CoreTlvDataUint32,
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LinkTlvs.KEY.value: CoreTlvDataUint32,
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LinkTlvs.INTERFACE1_NUMBER.value: CoreTlvDataUint16,
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LinkTlvs.INTERFACE1_IP4.value: CoreTlvDataIpv4Addr,
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LinkTlvs.INTERFACE1_IP4_MASK.value: CoreTlvDataUint16,
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LinkTlvs.INTERFACE1_MAC.value: CoreTlvDataMacAddr,
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LinkTlvs.INTERFACE1_IP6.value: CoreTlvDataIPv6Addr,
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LinkTlvs.INTERFACE1_IP6_MASK.value: CoreTlvDataUint16,
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LinkTlvs.INTERFACE2_NUMBER.value: CoreTlvDataUint16,
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LinkTlvs.INTERFACE2_IP4.value: CoreTlvDataIpv4Addr,
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LinkTlvs.INTERFACE2_IP4_MASK.value: CoreTlvDataUint16,
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LinkTlvs.INTERFACE2_MAC.value: CoreTlvDataMacAddr,
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LinkTlvs.INTERFACE2_IP6.value: CoreTlvDataIPv6Addr,
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LinkTlvs.INTERFACE2_IP6_MASK.value: CoreTlvDataUint16,
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LinkTlvs.INTERFACE1_NAME.value: CoreTlvDataString,
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LinkTlvs.INTERFACE2_NAME.value: CoreTlvDataString,
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LinkTlvs.OPAQUE.value: CoreTlvDataString,
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}
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class CoreExecuteTlv(CoreTlv):
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tlv_type_map = ExecuteTlvs
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tlv_data_class_map = {
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ExecuteTlvs.NODE.value: CoreTlvDataUint32,
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ExecuteTlvs.NUMBER.value: CoreTlvDataUint32,
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ExecuteTlvs.TIME.value: CoreTlvDataUint32,
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ExecuteTlvs.COMMAND.value: CoreTlvDataString,
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ExecuteTlvs.RESULT.value: CoreTlvDataString,
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ExecuteTlvs.STATUS.value: CoreTlvDataUint32,
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ExecuteTlvs.SESSION.value: CoreTlvDataString,
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}
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class CoreRegisterTlv(CoreTlv):
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tlv_type_map = RegisterTlvs
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tlv_data_class_map = {
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RegisterTlvs.WIRELESS.value: CoreTlvDataString,
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RegisterTlvs.MOBILITY.value: CoreTlvDataString,
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RegisterTlvs.UTILITY.value: CoreTlvDataString,
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RegisterTlvs.EXECUTE_SERVER.value: CoreTlvDataString,
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RegisterTlvs.GUI.value: CoreTlvDataString,
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RegisterTlvs.EMULATION_SERVER.value: CoreTlvDataString,
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RegisterTlvs.SESSION.value: CoreTlvDataString,
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}
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class CoreConfigTlv(CoreTlv):
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tlv_type_map = ConfigTlvs
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tlv_data_class_map = {
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ConfigTlvs.NODE.value: CoreTlvDataUint32,
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ConfigTlvs.OBJECT.value: CoreTlvDataString,
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ConfigTlvs.TYPE.value: CoreTlvDataUint16,
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ConfigTlvs.DATA_TYPES.value: CoreTlvDataUint16List,
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ConfigTlvs.VALUES.value: CoreTlvDataString,
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ConfigTlvs.CAPTIONS.value: CoreTlvDataString,
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ConfigTlvs.BITMAP.value: CoreTlvDataString,
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ConfigTlvs.POSSIBLE_VALUES.value: CoreTlvDataString,
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ConfigTlvs.GROUPS.value: CoreTlvDataString,
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ConfigTlvs.SESSION.value: CoreTlvDataString,
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ConfigTlvs.INTERFACE_NUMBER.value: CoreTlvDataUint16,
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ConfigTlvs.NETWORK_ID.value: CoreTlvDataUint32,
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ConfigTlvs.OPAQUE.value: CoreTlvDataString,
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}
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class CoreFileTlv(CoreTlv):
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tlv_type_map = FileTlvs
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tlv_data_class_map = {
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FileTlvs.NODE.value: CoreTlvDataUint32,
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FileTlvs.NAME.value: CoreTlvDataString,
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FileTlvs.MODE.value: CoreTlvDataString,
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FileTlvs.NUMBER.value: CoreTlvDataUint16,
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FileTlvs.TYPE.value: CoreTlvDataString,
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FileTlvs.SOURCE_NAME.value: CoreTlvDataString,
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FileTlvs.SESSION.value: CoreTlvDataString,
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FileTlvs.DATA.value: CoreTlvDataString,
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FileTlvs.COMPRESSED_DATA.value: CoreTlvDataString,
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}
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class CoreInterfaceTlv(CoreTlv):
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tlv_type_map = InterfaceTlvs
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tlv_data_class_map = {
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InterfaceTlvs.NODE.value: CoreTlvDataUint32,
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InterfaceTlvs.NUMBER.value: CoreTlvDataUint16,
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InterfaceTlvs.NAME.value: CoreTlvDataString,
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InterfaceTlvs.IP_ADDRESS.value: CoreTlvDataIpv4Addr,
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InterfaceTlvs.MASK.value: CoreTlvDataUint16,
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InterfaceTlvs.MAC_ADDRESS.value: CoreTlvDataMacAddr,
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InterfaceTlvs.IP6_ADDRESS.value: CoreTlvDataIPv6Addr,
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InterfaceTlvs.IP6_MASK.value: CoreTlvDataUint16,
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InterfaceTlvs.TYPE.value: CoreTlvDataUint16,
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InterfaceTlvs.SESSION.value: CoreTlvDataString,
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InterfaceTlvs.STATE.value: CoreTlvDataUint16,
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InterfaceTlvs.EMULATION_ID.value: CoreTlvDataUint32,
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InterfaceTlvs.NETWORK_ID.value: CoreTlvDataUint32,
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}
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class CoreEventTlv(CoreTlv):
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tlv_type_map = EventTlvs
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tlv_data_class_map = {
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EventTlvs.NODE.value: CoreTlvDataUint32,
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EventTlvs.TYPE.value: CoreTlvDataUint32,
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EventTlvs.NAME.value: CoreTlvDataString,
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EventTlvs.DATA.value: CoreTlvDataString,
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EventTlvs.TIME.value: CoreTlvDataString,
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EventTlvs.SESSION.value: CoreTlvDataString,
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}
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class CoreSessionTlv(CoreTlv):
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tlv_type_map = SessionTlvs
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tlv_data_class_map = {
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SessionTlvs.NUMBER.value: CoreTlvDataString,
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SessionTlvs.NAME.value: CoreTlvDataString,
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SessionTlvs.FILE.value: CoreTlvDataString,
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SessionTlvs.NODE_COUNT.value: CoreTlvDataString,
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SessionTlvs.DATE.value: CoreTlvDataString,
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SessionTlvs.THUMB.value: CoreTlvDataString,
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SessionTlvs.USER.value: CoreTlvDataString,
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SessionTlvs.OPAQUE.value: CoreTlvDataString,
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}
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class CoreExceptionTlv(CoreTlv):
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tlv_type_map = ExceptionTlvs
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tlv_data_class_map = {
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ExceptionTlvs.NODE.value: CoreTlvDataUint32,
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ExceptionTlvs.SESSION.value: CoreTlvDataString,
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ExceptionTlvs.LEVEL.value: CoreTlvDataUint16,
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ExceptionTlvs.SOURCE.value: CoreTlvDataString,
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ExceptionTlvs.DATE.value: CoreTlvDataString,
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ExceptionTlvs.TEXT.value: CoreTlvDataString,
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ExceptionTlvs.OPAQUE.value: CoreTlvDataString,
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}
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class CoreMessage(object):
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header_format = "!BBH"
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header_len = struct.calcsize(header_format)
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message_type = None
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flag_map = MessageFlags
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tlv_class = CoreTlv
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def __init__(self, flags, hdr, data):
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self.raw_message = hdr + data
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self.flags = flags
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self.tlv_data = {}
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self.parse_data(data)
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@classmethod
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def unpack_header(cls, data):
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"""
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parse data and return (message_type, message_flags, message_len).
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:param str data: data to parse
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:return: unpacked tuple
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:rtype: tuple
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"""
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message_type, message_flags, message_len = struct.unpack(cls.header_format, data[:cls.header_len])
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return message_type, message_flags, message_len
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@classmethod
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def pack(cls, message_flags, tlv_data):
|
|
header = struct.pack(cls.header_format, cls.message_type, message_flags, len(tlv_data))
|
|
return header + tlv_data
|
|
|
|
def add_tlv_data(self, key, value):
|
|
if key in self.tlv_data:
|
|
raise KeyError("key already exists: %s (val=%s)" % (key, value))
|
|
|
|
self.tlv_data[key] = value
|
|
|
|
def get_tlv(self, tlv_type):
|
|
return self.tlv_data.get(tlv_type)
|
|
|
|
def parse_data(self, data):
|
|
while data:
|
|
tlv, data = self.tlv_class.unpack(data)
|
|
self.add_tlv_data(tlv.tlv_type, tlv.value)
|
|
|
|
def pack_tlv_data(self):
|
|
"""
|
|
Opposite of parse_data(). Return packed TLV data using self.tlv_data dict. Used by repack().
|
|
|
|
:return: packed data
|
|
:rtype: str
|
|
"""
|
|
tlv_data = ""
|
|
keys = sorted(self.tlv_data.keys())
|
|
|
|
for key in keys:
|
|
value = self.tlv_data[key]
|
|
tlv_data += self.tlv_class.pack(key, value)
|
|
|
|
return tlv_data
|
|
|
|
def repack(self):
|
|
"""
|
|
Invoke after updating self.tlv_data[] to rebuild self.raw_message.
|
|
Useful for modifying a message that has been parsed, before
|
|
sending the raw data again.
|
|
|
|
:return: nothing
|
|
"""
|
|
tlv_data = self.pack_tlv_data()
|
|
self.raw_message = self.pack(self.flags, tlv_data)
|
|
|
|
def type_str(self):
|
|
try:
|
|
return MessageTypes(self.message_type).name
|
|
except ValueError:
|
|
return "unknown message type: %s" % str(self.message_type)
|
|
|
|
def flag_str(self):
|
|
message_flags = []
|
|
flag = 1L
|
|
|
|
while True:
|
|
if self.flags & flag:
|
|
try:
|
|
message_flags.append(self.flag_map(flag).name)
|
|
except ValueError:
|
|
message_flags.append("0x%x" % flag)
|
|
flag <<= 1
|
|
if not (self.flags & ~(flag - 1)):
|
|
break
|
|
|
|
return "0x%x <%s>" % (self.flags, " | ".join(message_flags))
|
|
|
|
def __str__(self):
|
|
result = "%s <msgtype = %s, flags = %s>" % (self.__class__.__name__, self.type_str(), self.flag_str())
|
|
|
|
for key, value in self.tlv_data.iteritems():
|
|
try:
|
|
tlv_type = self.tlv_class.tlv_type_map(key).name
|
|
except ValueError:
|
|
tlv_type = "tlv type %s" % key
|
|
|
|
result += "\n %s: %s" % (tlv_type, value)
|
|
|
|
return result
|
|
|
|
def node_numbers(self):
|
|
"""
|
|
Return a list of node numbers included in this message.
|
|
"""
|
|
number1 = None
|
|
number2 = None
|
|
|
|
# not all messages have node numbers
|
|
if self.message_type == MessageTypes.NODE.value:
|
|
number1 = self.get_tlv(NodeTlvs.NUMBER.value)
|
|
elif self.message_type == MessageTypes.LINK.value:
|
|
number1 = self.get_tlv(LinkTlvs.N1_NUMBER.value)
|
|
number2 = self.get_tlv(LinkTlvs.N2_NUMBER.value)
|
|
elif self.message_type == MessageTypes.EXECUTE.value:
|
|
number1 = self.get_tlv(ExecuteTlvs.NODE.value)
|
|
elif self.message_type == MessageTypes.CONFIG.value:
|
|
number1 = self.get_tlv(ConfigTlvs.NODE.value)
|
|
elif self.message_type == MessageTypes.FILE.value:
|
|
number1 = self.get_tlv(FileTlvs.NODE.value)
|
|
elif self.message_type == MessageTypes.INTERFACE.value:
|
|
number1 = self.get_tlv(InterfaceTlvs.NODE.value)
|
|
elif self.message_type == MessageTypes.EVENT.value:
|
|
number1 = self.get_tlv(EventTlvs.NODE)
|
|
|
|
result = []
|
|
|
|
if number1:
|
|
result.append(number1)
|
|
|
|
if number2:
|
|
result.append(number2)
|
|
|
|
return result
|
|
|
|
def session_numbers(self):
|
|
"""
|
|
Return a list of session numbers included in this message.
|
|
"""
|
|
result = []
|
|
|
|
if self.message_type == MessageTypes.SESSION.value:
|
|
sessions = self.get_tlv(SessionTlvs.NUMBER.value)
|
|
elif self.message_type == MessageTypes.EXCEPTION.value:
|
|
sessions = self.get_tlv(ExceptionTlvs.SESSION.value)
|
|
else:
|
|
# All other messages share TLV number 0xA for the session number(s).
|
|
sessions = self.get_tlv(NodeTlvs.SESSION.value)
|
|
|
|
if sessions:
|
|
for session_id in sessions.split("|"):
|
|
result.append(int(session_id))
|
|
|
|
return result
|
|
|
|
|
|
class CoreNodeMessage(CoreMessage):
|
|
message_type = MessageTypes.NODE.value
|
|
tlv_class = CoreNodeTlv
|
|
|
|
|
|
class CoreLinkMessage(CoreMessage):
|
|
message_type = MessageTypes.LINK.value
|
|
tlv_class = CoreLinkTlv
|
|
|
|
|
|
class CoreExecMessage(CoreMessage):
|
|
message_type = MessageTypes.EXECUTE.value
|
|
tlv_class = CoreExecuteTlv
|
|
|
|
|
|
class CoreRegMessage(CoreMessage):
|
|
message_type = MessageTypes.REGISTER.value
|
|
tlv_class = CoreRegisterTlv
|
|
|
|
|
|
class CoreConfMessage(CoreMessage):
|
|
message_type = MessageTypes.CONFIG.value
|
|
tlv_class = CoreConfigTlv
|
|
|
|
|
|
class CoreFileMessage(CoreMessage):
|
|
message_type = MessageTypes.FILE.value
|
|
tlv_class = CoreFileTlv
|
|
|
|
|
|
class CoreIfaceMessage(CoreMessage):
|
|
message_type = MessageTypes.INTERFACE.value
|
|
tlv_class = CoreInterfaceTlv
|
|
|
|
|
|
class CoreEventMessage(CoreMessage):
|
|
message_type = MessageTypes.EVENT.value
|
|
tlv_class = CoreEventTlv
|
|
|
|
|
|
class CoreSessionMessage(CoreMessage):
|
|
message_type = MessageTypes.SESSION.value
|
|
tlv_class = CoreSessionTlv
|
|
|
|
|
|
class CoreExceptionMessage(CoreMessage):
|
|
message_type = MessageTypes.EXCEPTION.value
|
|
tlv_class = CoreExceptionTlv
|
|
|
|
|
|
CLASS_MAP = {
|
|
MessageTypes.NODE.value: CoreNodeMessage,
|
|
MessageTypes.LINK.value: CoreLinkMessage,
|
|
MessageTypes.EXECUTE.value: CoreExecMessage,
|
|
MessageTypes.REGISTER.value: CoreRegMessage,
|
|
MessageTypes.CONFIG.value: CoreConfMessage,
|
|
MessageTypes.FILE.value: CoreFileMessage,
|
|
MessageTypes.INTERFACE.value: CoreIfaceMessage,
|
|
MessageTypes.EVENT.value: CoreEventMessage,
|
|
MessageTypes.SESSION.value: CoreSessionMessage,
|
|
MessageTypes.EXCEPTION.value: CoreExceptionMessage,
|
|
}
|
|
|
|
|
|
def str_to_list(value):
|
|
"""
|
|
Helper to convert pipe-delimited string ("a|b|c") into a list (a, b, c).
|
|
|
|
:param str value: string to convert
|
|
:return: converted list
|
|
:rtype: list
|
|
"""
|
|
|
|
if value is None:
|
|
return None
|
|
|
|
return value.split("|")
|
|
|
|
|
|
def state_name(value):
|
|
"""
|
|
Helper to convert state number into state name using event types.
|
|
|
|
:param int value: state value to derive name from
|
|
:return: state name
|
|
:rtype: str
|
|
"""
|
|
|
|
try:
|
|
value = EventTypes(value).name
|
|
except ValueError:
|
|
value = "unknown"
|
|
|
|
return value
|