125 lines
3.7 KiB
Python
125 lines
3.7 KiB
Python
"""Support for fetching WiFi associations through SNMP."""
|
|
import binascii
|
|
import logging
|
|
|
|
import voluptuous as vol
|
|
|
|
from homeassistant.components.device_tracker import (
|
|
DOMAIN,
|
|
PLATFORM_SCHEMA,
|
|
DeviceScanner,
|
|
)
|
|
from homeassistant.const import CONF_HOST
|
|
import homeassistant.helpers.config_validation as cv
|
|
|
|
from .const import (
|
|
CONF_AUTH_KEY,
|
|
CONF_BASEOID,
|
|
CONF_COMMUNITY,
|
|
CONF_PRIV_KEY,
|
|
DEFAULT_COMMUNITY,
|
|
)
|
|
|
|
_LOGGER = logging.getLogger(__name__)
|
|
|
|
PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
|
|
{
|
|
vol.Required(CONF_BASEOID): cv.string,
|
|
vol.Required(CONF_HOST): cv.string,
|
|
vol.Optional(CONF_COMMUNITY, default=DEFAULT_COMMUNITY): cv.string,
|
|
vol.Inclusive(CONF_AUTH_KEY, "keys"): cv.string,
|
|
vol.Inclusive(CONF_PRIV_KEY, "keys"): cv.string,
|
|
}
|
|
)
|
|
|
|
|
|
def get_scanner(hass, config):
|
|
"""Validate the configuration and return an SNMP scanner."""
|
|
scanner = SnmpScanner(config[DOMAIN])
|
|
|
|
return scanner if scanner.success_init else None
|
|
|
|
|
|
class SnmpScanner(DeviceScanner):
|
|
"""Queries any SNMP capable Access Point for connected devices."""
|
|
|
|
def __init__(self, config):
|
|
"""Initialize the scanner."""
|
|
from pysnmp.entity.rfc3413.oneliner import cmdgen
|
|
from pysnmp.entity import config as cfg
|
|
|
|
self.snmp = cmdgen.CommandGenerator()
|
|
|
|
self.host = cmdgen.UdpTransportTarget((config[CONF_HOST], 161))
|
|
if CONF_AUTH_KEY not in config or CONF_PRIV_KEY not in config:
|
|
self.auth = cmdgen.CommunityData(config[CONF_COMMUNITY])
|
|
else:
|
|
self.auth = cmdgen.UsmUserData(
|
|
config[CONF_COMMUNITY],
|
|
config[CONF_AUTH_KEY],
|
|
config[CONF_PRIV_KEY],
|
|
authProtocol=cfg.usmHMACSHAAuthProtocol,
|
|
privProtocol=cfg.usmAesCfb128Protocol,
|
|
)
|
|
self.baseoid = cmdgen.MibVariable(config[CONF_BASEOID])
|
|
self.last_results = []
|
|
|
|
# Test the router is accessible
|
|
data = self.get_snmp_data()
|
|
self.success_init = data is not None
|
|
|
|
def scan_devices(self):
|
|
"""Scan for new devices and return a list with found device IDs."""
|
|
self._update_info()
|
|
return [client["mac"] for client in self.last_results if client.get("mac")]
|
|
|
|
def get_device_name(self, device):
|
|
"""Return the name of the given device or None if we don't know."""
|
|
# We have no names
|
|
return None
|
|
|
|
def _update_info(self):
|
|
"""Ensure the information from the device is up to date.
|
|
|
|
Return boolean if scanning successful.
|
|
"""
|
|
if not self.success_init:
|
|
return False
|
|
|
|
data = self.get_snmp_data()
|
|
if not data:
|
|
return False
|
|
|
|
self.last_results = data
|
|
return True
|
|
|
|
def get_snmp_data(self):
|
|
"""Fetch MAC addresses from access point via SNMP."""
|
|
devices = []
|
|
|
|
errindication, errstatus, errindex, restable = self.snmp.nextCmd(
|
|
self.auth, self.host, self.baseoid
|
|
)
|
|
|
|
if errindication:
|
|
_LOGGER.error("SNMPLIB error: %s", errindication)
|
|
return
|
|
if errstatus:
|
|
_LOGGER.error(
|
|
"SNMP error: %s at %s",
|
|
errstatus.prettyPrint(),
|
|
errindex and restable[int(errindex) - 1][0] or "?",
|
|
)
|
|
return
|
|
|
|
for resrow in restable:
|
|
for _, val in resrow:
|
|
try:
|
|
mac = binascii.hexlify(val.asOctets()).decode("utf-8")
|
|
except AttributeError:
|
|
continue
|
|
_LOGGER.debug("Found MAC address: %s", mac)
|
|
mac = ":".join([mac[i : i + 2] for i in range(0, len(mac), 2)])
|
|
devices.append({"mac": mac})
|
|
return devices
|