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from typing import List, Optional
from typing_extensions import Literal
from knot_resolver.datamodel.types import IDPattern, IPNetwork
from knot_resolver.utils.modeling import ConfigSchema
class ViewOptionsSchema(ConfigSchema):
"""
Configuration options for clients identified by the view.
---
minimize: Send minimum amount of information in recursive queries to enhance privacy.
dns64: Enable/disable DNS64.
"""
minimize: bool = True
dns64: bool = True
class ViewSchema(ConfigSchema):
"""
Configuration parameters that allow you to create personalized policy rules and other.
---
subnets: Identifies the client based on his subnet. Rule with more precise subnet takes priority.
dst_subnet: Destination subnet, as an additional condition.
protocols: Transport protocol, as an additional condition.
tags: Tags to link with other policy rules.
answer: Direct approach how to handle request from clients identified by the view.
options: Configuration options for clients identified by the view.
"""
subnets: List[IPNetwork]
dst_subnet: Optional[IPNetwork] = None # could be a list as well, iterated in template
protocols: Optional[List[Literal["udp53", "tcp53", "dot", "doh", "doq"]]] = None
tags: Optional[List[IDPattern]] = None
answer: Optional[Literal["allow", "refused", "noanswer"]] = None
options: ViewOptionsSchema = ViewOptionsSchema()
def _validate(self) -> None:
if bool(self.tags) == bool(self.answer):
raise ValueError("exactly one of 'tags' and 'answer' must be configured")
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