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"""
Module for Serialization and Deserialization of KNX Extended Search Requests.
Extended Search Requests are used to search for KNX/IP devices within the network that support for instance IP Secure.
See AN184 in version 03 from the KNX specifications.
"""
from __future__ import annotations
from .body import KNXIPBody
from .hpai import HPAI
from .knxip_enum import KNXIPServiceType
from .srp import SRP
class SearchRequestExtended(KNXIPBody):
"""Representation of a KNX Search Request Extended."""
SERVICE_TYPE = KNXIPServiceType.SEARCH_REQUEST_EXTENDED
def __init__(
self,
discovery_endpoint: HPAI | None = None,
srps: list[SRP] | None = None,
) -> None:
"""Initialize SearchRequestExtended object."""
self.discovery_endpoint = discovery_endpoint or HPAI()
self.srps = srps or []
def calculated_length(self) -> int:
"""Get length of KNX/IP body."""
return HPAI.LENGTH + sum(srp.payload_size for srp in self.srps)
def from_knx(self, raw: bytes) -> int:
"""Parse/deserialize from KNX/IP raw data."""
pos: int = self.discovery_endpoint.from_knx(raw)
while raw[pos:]:
srp = SRP.from_knx(raw[pos:])
pos += len(srp)
self.srps.append(srp)
return pos
def to_knx(self) -> bytes:
"""Serialize to KNX/IP raw data."""
return self.discovery_endpoint.to_knx() + b"".join(
bytes(srp) for srp in self.srps
)
def __repr__(self) -> str:
"""Return object as readable string."""
return (
"<SearchRequestExtended "
f'discovery_endpoint="{self.discovery_endpoint}" '
f'srps="{self.srps}" />'
)
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