text: """The SSDP integration."""
  from __future__ import annotations
  
  import asyncio
  from collections.abc import Awaitable
  from datetime import timedelta
  from enum import Enum
  from ipaddress import IPv4Address, IPv6Address
  import logging
  from typing import Any, Callable, Mapping
  
  from async_upnp_client.aiohttp import AiohttpSessionRequester
  from async_upnp_client.const import DeviceOrServiceType, SsdpHeaders, SsdpSource
  from async_upnp_client.description_cache import DescriptionCache
  from async_upnp_client.ssdp import SSDP_PORT
  from async_upnp_client.ssdp_listener import SsdpDevice, SsdpListener
  from async_upnp_client.utils import CaseInsensitiveDict
  
  from homeassistant import config_entries
  from homeassistant.components import network
  from homeassistant.const import (
      EVENT_HOMEASSISTANT_STARTED,
      EVENT_HOMEASSISTANT_STOP,
      MATCH_ALL,
  )
  from homeassistant.core import HomeAssistant, callback as core_callback
  from homeassistant.helpers.aiohttp_client import async_get_clientsession
  from homeassistant.helpers.event import async_track_time_interval
  from homeassistant.helpers.typing import ConfigType
  from homeassistant.loader import async_get_ssdp, bind_hass
  
  from .flow import FlowDispatcher, SSDPFlow
  
  DOMAIN = "ssdp"
  SCAN_INTERVAL = timedelta(seconds=60)
  
  IPV4_BROADCAST = IPv4Address("255.255.255.255")
  
  # Attributes for accessing info from SSDP response
  ATTR_SSDP_LOCATION = "ssdp_location"
  ATTR_SSDP_ST = "ssdp_st"
  ATTR_SSDP_USN = "ssdp_usn"
  ATTR_SSDP_EXT = "ssdp_ext"
  ATTR_SSDP_SERVER = "ssdp_server"
  # Attributes for accessing info from retrieved UPnP device description
  ATTR_UPNP_DEVICE_TYPE = "deviceType"
  ATTR_UPNP_FRIENDLY_NAME = "friendlyName"
  ATTR_UPNP_MANUFACTURER = "manufacturer"
  ATTR_UPNP_MANUFACTURER_URL = "manufacturerURL"
  ATTR_UPNP_MODEL_DESCRIPTION = "modelDescription"
  ATTR_UPNP_MODEL_NAME = "modelName"
  ATTR_UPNP_MODEL_NUMBER = "modelNumber"
  ATTR_UPNP_MODEL_URL = "modelURL"
  ATTR_UPNP_SERIAL = "serialNumber"
  ATTR_UPNP_UDN = "UDN"
  ATTR_UPNP_UPC = "UPC"
  ATTR_UPNP_PRESENTATION_URL = "presentationURL"
  
  
  DISCOVERY_MAPPING = {
      "usn": ATTR_SSDP_USN,
      "ext": ATTR_SSDP_EXT,
      "server": ATTR_SSDP_SERVER,
      "st": ATTR_SSDP_ST,
      "location": ATTR_SSDP_LOCATION,
  }
  
  SsdpChange = Enum("SsdpChange", "ALIVE BYEBYE UPDATE")
  SsdpCallback = Callable[[Mapping[str, Any], SsdpChange], Awaitable]
  
  
  SSDP_SOURCE_SSDP_CHANGE_MAPPING: Mapping[SsdpSource, SsdpChange] = {
      SsdpSource.SEARCH: SsdpChange.ALIVE,
      SsdpSource.ADVERTISEMENT_ALIVE: SsdpChange.ALIVE,
      SsdpSource.ADVERTISEMENT_BYEBYE: SsdpChange.BYEBYE,
      SsdpSource.ADVERTISEMENT_UPDATE: SsdpChange.UPDATE,
  }
  
  
  _LOGGER = logging.getLogger(__name__)
  
  
  @bind_hass
  async def async_register_callback(
      hass: HomeAssistant,
      callback: SsdpCallback,
      match_dict: None | dict[str, str] = None,
  ) -> Callable[[], None]:
      """Register to receive a callback on ssdp broadcast.
  
      Returns a callback that can be used to cancel the registration.
      """
      scanner: Scanner = hass.data[DOMAIN]
      return await scanner.async_register_callback(callback, match_dict)
  
  
  @bind_hass
  async def async_get_discovery_info_by_udn_st(  # pylint: disable=invalid-name
      hass: HomeAssistant, udn: str, st: str
  ) -> dict[str, str] | None:
      """Fetch the discovery info cache."""
      scanner: Scanner = hass.data[DOMAIN]
      return await scanner.async_get_discovery_info_by_udn_st(udn, st)
  
  
  @bind_hass
  async def async_get_discovery_info_by_st(  # pylint: disable=invalid-name
      hass: HomeAssistant, st: str
  ) -> list[dict[str, str]]:
      """Fetch all the entries matching the st."""
      scanner: Scanner = hass.data[DOMAIN]
      return await scanner.async_get_discovery_info_by_st(st)
  
  
  @bind_hass
  async def async_get_discovery_info_by_udn(
      hass: HomeAssistant, udn: str
  ) -> list[dict[str, str]]:
      """Fetch all the entries matching the udn."""
      scanner: Scanner = hass.data[DOMAIN]
      return await scanner.async_get_discovery_info_by_udn(udn)
  
  
  async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
      """Set up the SSDP integration."""
  
      scanner = hass.data[DOMAIN] = Scanner(hass)
  
      asyncio.create_task(scanner.async_start())
  
      return True
  
  
  async def _async_process_callbacks(
      callbacks: list[SsdpCallback],
      discovery_info: dict[str, str],
      ssdp_change: SsdpChange,
  ) -> None:
      for callback in callbacks:
          try:
              await callback(discovery_info, ssdp_change)
          except Exception:  # pylint: disable=broad-except
              _LOGGER.exception("Failed to callback info: %s", discovery_info)
  
  
  @core_callback
  def _async_headers_match(
      headers: Mapping[str, Any], match_dict: dict[str, str]
  ) -> bool:
      for header, val in match_dict.items():
          if val == MATCH_ALL:
              if header not in headers:
                  return False
          elif headers.get(header) != val:
              return False
      return True
  
  
  class Scanner:
      """Class to manage SSDP searching and SSDP advertisements."""
  
      def __init__(self, hass: HomeAssistant) -> None:
          """Initialize class."""
          self.hass = hass
          self._cancel_scan: Callable[[], None] | None = None
          self._ssdp_listeners: list[SsdpListener] = []
          self._callbacks: list[tuple[SsdpCallback, dict[str, str]]] = []
          self._flow_dispatcher: FlowDispatcher | None = None
          self._description_cache: DescriptionCache | None = None
          self._integration_matchers: dict[str, list[dict[str, str]]] | None = None
  
      @property
      def _ssdp_devices(self) -> list[SsdpDevice]:
          """Get all seen devices."""
          return [
              ssdp_device
              for ssdp_listener in self._ssdp_listeners
              for ssdp_device in ssdp_listener.devices.values()
          ]
  
      @property
      def _all_headers_from_ssdp_devices(
          self,
      ) -> dict[tuple[str, str], Mapping[str, Any]]:
          return {
              (ssdp_device.udn, dst): headers
              for ssdp_device in self._ssdp_devices
              for dst, headers in ssdp_device.all_combined_headers.items()
          }
  
      async def async_register_callback(
          self, callback: SsdpCallback, match_dict: None | dict[str, str] = None
      ) -> Callable[[], None]:
          """Register a callback."""
          if match_dict is None:
              match_dict = {}
  
          # Make sure any entries that happened
          # before the callback was registered are fired
          for headers in self._all_headers_from_ssdp_devices.values():
              if _async_headers_match(headers, match_dict):
                  await _async_process_callbacks(
                      [callback],
                      await self._async_headers_to_discovery_info(headers),
                      SsdpChange.ALIVE,
                  )
  
          callback_entry = (callback, match_dict)
          self._callbacks.append(callback_entry)
  
          @core_callback
          def _async_remove_callback() -> None:
              self._callbacks.remove(callback_entry)
  
          return _async_remove_callback
  
      async def async_stop(self, *_: Any) -> None:
          """Stop the scanner."""
          assert self._cancel_scan is not None
          self._cancel_scan()
  
          await self._async_stop_ssdp_listeners()
  
      async def _async_stop_ssdp_listeners(self) -> None:
          """Stop the SSDP listeners."""
          await asyncio.gather(
              *(listener.async_stop() for listener in self._ssdp_listeners),
              return_exceptions=True,
          )
  
      async def _async_build_source_set(self) -> set[IPv4Address | IPv6Address]:
          """Build the list of ssdp sources."""
          adapters = await network.async_get_adapters(self.hass)
          sources: set[IPv4Address | IPv6Address] = set()
          if network.async_only_default_interface_enabled(adapters):
              sources.add(IPv4Address("0.0.0.0"))
              return sources
  
          return {
              source_ip
              for source_ip in await network.async_get_enabled_source_ips(self.hass)
              if not source_ip.is_loopback
              and not (isinstance(source_ip, IPv6Address) and source_ip.is_global)
          }
  
      async def async_scan(self, *_: Any) -> None:
          """Scan for new entries using ssdp listeners."""
          await self.async_scan_multicast()
          await self.async_scan_broadcast()
  
      async def async_scan_multicast(self, *_: Any) -> None:
          """Scan for new entries using multicase target."""
          for ssdp_listener in self._ssdp_listeners:
              await ssdp_listener.async_search()
  
      async def async_scan_broadcast(self, *_: Any) -> None:
          """Scan for new entries using broadcast target."""
          # Some sonos devices only seem to respond if we send to the broadcast
          # address. This matches pysonos' behavior
          # https://github.com/amelchio/pysonos/blob/d4329b4abb657d106394ae69357805269708c996/pysonos/discovery.py#L120
          for listener in self._ssdp_listeners:
              try:
                  IPv4Address(listener.source_ip)
              except ValueError:
                  continue
              await listener.async_search((str(IPV4_BROADCAST), SSDP_PORT))
  
      async def async_start(self) -> None:
          """Start the scanners."""
          session = async_get_clientsession(self.hass)
          requester = AiohttpSessionRequester(session, True, 10)
          self._description_cache = DescriptionCache(requester)
          self._flow_dispatcher = FlowDispatcher(self.hass)
          self._integration_matchers = await async_get_ssdp(self.hass)
  
          await self._async_start_ssdp_listeners()
  
          self.hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, self.async_stop)
          self.hass.bus.async_listen_once(
              EVENT_HOMEASSISTANT_STARTED, self._flow_dispatcher.async_start
          )
          self._cancel_scan = async_track_time_interval(
              self.hass, self.async_scan, SCAN_INTERVAL
          )
  
          # Trigger the initial-scan.
          await self.async_scan()
  
      async def _async_start_ssdp_listeners(self) -> None:
          """Start the SSDP Listeners."""
          for source_ip in await self._async_build_source_set():
              self._ssdp_listeners.append(
                  SsdpListener(
                      async_callback=self._ssdp_listener_callback,
                      source_ip=source_ip,
                  )
              )
          results = await asyncio.gather(
              *(listener.async_start() for listener in self._ssdp_listeners),
              return_exceptions=True,
          )
          failed_listeners = []
          for idx, result in enumerate(results):
              if isinstance(result, Exception):
                  _LOGGER.warning(
                      "Failed to setup listener for %s: %s",
                      self._ssdp_listeners[idx].source_ip,
                      result,
                  )
                  failed_listeners.append(self._ssdp_listeners[idx])
          for listener in failed_listeners:
              self._ssdp_listeners.remove(listener)
  
      @core_callback
      def _async_get_matching_callbacks(
          self,
          combined_headers: SsdpHeaders,
      ) -> list[SsdpCallback]:
          """Return a list of callbacks that match."""
          return [
              callback
              for callback, match_dict in self._callbacks
              if _async_headers_match(combined_headers, match_dict)
          ]
  
      @core_callback
      def _async_matching_domains(self, info_with_desc: CaseInsensitiveDict) -> set[str]:
          assert self._integration_matchers is not None
          domains = set()
          for domain, matchers in self._integration_matchers.items():
              for matcher in matchers:
                  if all(info_with_desc.get(k) == v for (k, v) in matcher.items()):
                      domains.add(domain)
          return domains
  
      async def _ssdp_listener_callback(
          self, ssdp_device: SsdpDevice, dst: DeviceOrServiceType, source: SsdpSource
      ) -> None:
          """Handle a device/service change."""
          _LOGGER.debug(
              "Change, ssdp_device: %s, dst: %s, source: %s", ssdp_device, dst, source
          )
  
          location = ssdp_device.location
          info_desc = await self._async_get_description_dict(location) or {}
          combined_headers = ssdp_device.combined_headers(dst)
          info_with_desc = CaseInsensitiveDict(combined_headers, **info_desc)
          discovery_info = discovery_info_from_headers_and_description(info_with_desc)
  
          callbacks = self._async_get_matching_callbacks(combined_headers)
          ssdp_change = SSDP_SOURCE_SSDP_CHANGE_MAPPING[source]
          await _async_process_callbacks(callbacks, discovery_info, ssdp_change)
  
          for domain in self._async_matching_domains(info_with_desc):
              _LOGGER.debug("Discovered %s at %s", domain, location)
  
              flow: SSDPFlow = {
                  "domain": domain,
                  "context": {"source": config_entries.SOURCE_SSDP},
                  "data": discovery_info,
              }
              assert self._flow_dispatcher is not None
              self._flow_dispatcher.create(flow)
  
      async def _async_get_description_dict(
          self, location: str | None
      ) -> Mapping[str, str]:
          """Get description dict."""
          assert self._description_cache is not None
          return await self._description_cache.async_get_description_dict(location) or {}
  
      async def _async_headers_to_discovery_info(
          self, headers: Mapping[str, Any]
      ) -> dict[str, Any]:
          """Combine the headers and description into discovery_info.
  
          Building this is a bit expensive so we only do it on demand.
          """
          assert self._description_cache is not None
          location = headers["location"]
          info_desc = (
              await self._description_cache.async_get_description_dict(location) or {}
          )
          return discovery_info_from_headers_and_description(
              CaseInsensitiveDict(headers, **info_desc)
          )
  
      async def async_get_discovery_info_by_udn_st(  # pylint: disable=invalid-name
          self, udn: str, st: str
      ) -> dict[str, Any] | None:
          """Return discovery_info for a udn and st."""
          if headers := self._all_headers_from_ssdp_devices.get((udn, st)):
              return await self._async_headers_to_discovery_info(headers)
          return None
  
      async def async_get_discovery_info_by_st(  # pylint: disable=invalid-name
          self, st: str
      ) -> list[dict[str, Any]]:
          """Return matching discovery_infos for a st."""
          return [
              await self._async_headers_to_discovery_info(headers)
              for udn_st, headers in self._all_headers_from_ssdp_devices.items()
              if udn_st[1] == st
          ]
  
      async def async_get_discovery_info_by_udn(self, udn: str) -> list[dict[str, Any]]:
          """Return matching discovery_infos for a udn."""
          return [
              await self._async_headers_to_discovery_info(headers)
              for udn_st, headers in self._all_headers_from_ssdp_devices.items()
              if udn_st[0] == udn
          ]
  
  
  def discovery_info_from_headers_and_description(
      info_with_desc: CaseInsensitiveDict,
  ) -> dict[str, Any]:
      """Convert headers and description to discovery_info."""
      info = {
          DISCOVERY_MAPPING.get(k.lower(), k): v
          for k, v in info_with_desc.as_dict().items()
      }
  
      if ATTR_UPNP_UDN not in info and ATTR_SSDP_USN in info:
          if udn := _udn_from_usn(info[ATTR_SSDP_USN]):
              info[ATTR_UPNP_UDN] = udn
  
      return info
  
  
  def _udn_from_usn(usn: str | None) -> str | None:
      """Get the UDN from the USN."""
      if usn is None:
          return None
      if usn.startswith("uuid:"):
          return usn.split("::")[0]
      return None
  