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#
# This file is part of pysnmp software.
#
# Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
# License: https://www.pysnmp.com/pysnmp/license.html
#
from typing import TYPE_CHECKING
from pysnmp.proto import error
from pysnmp.proto.errind import ErrorIndication
from pysnmp.proto.secmod import cache
if TYPE_CHECKING:
from pysnmp.entity.engine import SnmpEngine
class AbstractSecurityModel:
"""Abstract security model class."""
SECURITY_MODEL_ID = None
_cache: cache.Cache
def __init__(self):
"""Create a security model object."""
self._cache = cache.Cache()
def process_incoming_message(
self,
snmpEngine: "SnmpEngine",
messageProcessingModel,
maxMessageSize,
securityParameters,
securityModel,
securityLevel,
wholeMsg,
msg,
):
"""Process an incoming message."""
raise error.ProtocolError("Security model %s not implemented" % self)
def generate_request_message(
self,
snmpEngine: "SnmpEngine",
messageProcessingModel,
globalData,
maxMessageSize,
securityModel,
securityEngineID,
securityName,
securityLevel,
scopedPDU,
):
"""Generate a request message."""
raise error.ProtocolError("Security model %s not implemented" % self)
def generate_response_message(
self,
snmpEngine: "SnmpEngine",
messageProcessingModel,
globalData,
maxMessageSize,
securityModel,
securityEngineID,
securityName,
securityLevel,
scopedPDU,
securityStateReference,
ctx: ErrorIndication,
):
"""Generate a response message."""
raise error.ProtocolError("Security model %s not implemented" % self)
def release_state_information(self, stateReference):
"""Release state information."""
self._cache.pop(stateReference)
def receive_timer_tick(self, snmpEngine: "SnmpEngine", timeNow):
"""Process a timer tick."""
pass
def _close(self):
"""
Close the security model to test memory leak.
This method is intended for unit testing purposes only.
It closes the security model and checks if all associated resources are released.
"""
raise error.ProtocolError("Security model %s not implemented" % self)
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