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"""Abstraction to send SessionRequest and wait for SessionResponse."""
from __future__ import annotations
from typing import TYPE_CHECKING
from xknx.knxip import KNXIPFrame, SessionRequest, SessionResponse
from .request_response import RequestResponse
if TYPE_CHECKING:
from xknx.io.transport import KNXIPTransport
class Session(RequestResponse):
"""Class to send a SessionRequest and wait for SessionResponse."""
def __init__(
self,
transport: KNXIPTransport,
ecdh_client_public_key: bytes,
) -> None:
"""Initialize Session class."""
# TODO: increase timeout to timeoutAuthentication: 10sec ?
super().__init__(transport, SessionResponse)
self.ecdh_client_public_key = ecdh_client_public_key
# TODO: make RequestResponse generic for response class
# maybe replace self.success with self.response None check
# remove on_success_hook in favour of using knxipframe.body directly
self.response: SessionResponse | None = None
def create_knxipframe(self) -> KNXIPFrame:
"""Create KNX/IP Frame object to be sent to device."""
return KNXIPFrame.init_from_body(
SessionRequest(ecdh_client_public_key=self.ecdh_client_public_key)
)
def on_success_hook(self, knxipframe: KNXIPFrame) -> None:
"""Set communication channel and identifier after having received a valid answer."""
assert isinstance(knxipframe.body, SessionResponse)
self.response = knxipframe.body
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