mirror of
https://github.com/mjg59/python-broadlink.git
synced 2024-11-14 03:20:14 +01:00
307 lines
10 KiB
Python
307 lines
10 KiB
Python
"""Support for Broadlink devices."""
|
|
import socket
|
|
import threading
|
|
import random
|
|
import time
|
|
from typing import Generator, Tuple, Union
|
|
|
|
from cryptography.hazmat.backends import default_backend
|
|
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
|
|
|
|
from .exceptions import check_error, exception
|
|
from .protocol import Datetime
|
|
|
|
HelloResponse = Tuple[int, Tuple[str, int], str, str, bool]
|
|
|
|
|
|
def scan(
|
|
timeout: int = 10,
|
|
local_ip_address: str = None,
|
|
discover_ip_address: str = "255.255.255.255",
|
|
discover_ip_port: int = 80,
|
|
) -> Generator[HelloResponse, None, None]:
|
|
"""Broadcast a hello message and yield responses."""
|
|
conn = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
|
|
conn.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
|
|
conn.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
|
|
|
|
if local_ip_address:
|
|
conn.bind((local_ip_address, 0))
|
|
port = conn.getsockname()[1]
|
|
else:
|
|
local_ip_address = "0.0.0.0"
|
|
port = 0
|
|
|
|
packet = bytearray(0x30)
|
|
packet[0x08:0x14] = Datetime.pack(Datetime.now())
|
|
packet[0x18:0x1C] = socket.inet_aton(local_ip_address)[::-1]
|
|
packet[0x1C:0x1E] = port.to_bytes(2, "little")
|
|
packet[0x26] = 6
|
|
|
|
checksum = sum(packet, 0xBEAF) & 0xFFFF
|
|
packet[0x20:0x22] = checksum.to_bytes(2, "little")
|
|
|
|
start_time = time.time()
|
|
discovered = []
|
|
|
|
try:
|
|
while (time.time() - start_time) < timeout:
|
|
time_left = timeout - (time.time() - start_time)
|
|
conn.settimeout(min(1, time_left))
|
|
conn.sendto(packet, (discover_ip_address, discover_ip_port))
|
|
|
|
while True:
|
|
try:
|
|
resp, host = conn.recvfrom(1024)
|
|
except socket.timeout:
|
|
break
|
|
|
|
devtype = resp[0x34] | resp[0x35] << 8
|
|
mac = resp[0x3A:0x40][::-1]
|
|
|
|
if (host, mac, devtype) in discovered:
|
|
continue
|
|
discovered.append((host, mac, devtype))
|
|
|
|
name = resp[0x40:].split(b"\x00")[0].decode()
|
|
is_locked = bool(resp[-1])
|
|
yield devtype, host, mac, name, is_locked
|
|
finally:
|
|
conn.close()
|
|
|
|
|
|
def ping(address: str, port: int = 80) -> None:
|
|
"""Send a ping packet to an address.
|
|
|
|
This packet feeds the watchdog timer of firmwares >= v53.
|
|
Useful to prevent reboots when the cloud cannot be reached.
|
|
It must be sent every 2 minutes in such cases.
|
|
"""
|
|
with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as conn:
|
|
conn.setsockopt(socket.SOL_SOCKET, socket.SO_BROADCAST, 1)
|
|
packet = bytearray(0x30)
|
|
packet[0x26] = 1
|
|
conn.sendto(packet, (address, port))
|
|
|
|
|
|
class device:
|
|
"""Controls a Broadlink device."""
|
|
|
|
TYPE = "Unknown"
|
|
|
|
__INIT_KEY = "097628343fe99e23765c1513accf8b02"
|
|
__INIT_VECT = "562e17996d093d28ddb3ba695a2e6f58"
|
|
|
|
def __init__(
|
|
self,
|
|
host: Tuple[str, int],
|
|
mac: Union[bytes, str],
|
|
devtype: int,
|
|
timeout: int = 10,
|
|
name: str = "",
|
|
model: str = "",
|
|
manufacturer: str = "",
|
|
is_locked: bool = False,
|
|
) -> None:
|
|
"""Initialize the controller."""
|
|
self.host = host
|
|
self.mac = bytes.fromhex(mac) if isinstance(mac, str) else mac
|
|
self.devtype = devtype
|
|
self.timeout = timeout
|
|
self.name = name
|
|
self.model = model
|
|
self.manufacturer = manufacturer
|
|
self.is_locked = is_locked
|
|
self.count = random.randint(0x8000, 0xFFFF)
|
|
self.iv = bytes.fromhex(self.__INIT_VECT)
|
|
self.id = 0
|
|
self.type = self.TYPE # For backwards compatibility.
|
|
self.lock = threading.Lock()
|
|
|
|
self.aes = None
|
|
self.update_aes(bytes.fromhex(self.__INIT_KEY))
|
|
|
|
def __repr__(self) -> str:
|
|
"""Return a formal representation of the device."""
|
|
return (
|
|
"%s.%s(%s, mac=%r, devtype=%r, timeout=%r, name=%r, "
|
|
"model=%r, manufacturer=%r, is_locked=%r)"
|
|
) % (
|
|
self.__class__.__module__,
|
|
self.__class__.__qualname__,
|
|
self.host,
|
|
self.mac,
|
|
self.devtype,
|
|
self.timeout,
|
|
self.name,
|
|
self.model,
|
|
self.manufacturer,
|
|
self.is_locked,
|
|
)
|
|
|
|
def __str__(self) -> str:
|
|
"""Return a readable representation of the device."""
|
|
model = []
|
|
if self.manufacturer:
|
|
model.append(self.manufacturer)
|
|
if self.model:
|
|
model.append(self.model)
|
|
model.append(hex(self.devtype))
|
|
model = " ".join(model)
|
|
|
|
info = []
|
|
info.append(model)
|
|
info.append(f"{self.host[0]}:{self.host[1]}")
|
|
info.append(":".join(format(x, "02x") for x in self.mac).upper())
|
|
info = " / ".join(info)
|
|
return "%s (%s)" % (self.name or "Unknown", info)
|
|
|
|
def update_aes(self, key: bytes) -> None:
|
|
"""Update AES."""
|
|
self.aes = Cipher(
|
|
algorithms.AES(bytes(key)), modes.CBC(self.iv), backend=default_backend()
|
|
)
|
|
|
|
def encrypt(self, payload: bytes) -> bytes:
|
|
"""Encrypt the payload."""
|
|
encryptor = self.aes.encryptor()
|
|
return encryptor.update(bytes(payload)) + encryptor.finalize()
|
|
|
|
def decrypt(self, payload: bytes) -> bytes:
|
|
"""Decrypt the payload."""
|
|
decryptor = self.aes.decryptor()
|
|
return decryptor.update(bytes(payload)) + decryptor.finalize()
|
|
|
|
def auth(self) -> bool:
|
|
"""Authenticate to the device."""
|
|
self.id = 0
|
|
self.update_aes(bytes.fromhex(self.__INIT_KEY))
|
|
|
|
payload = bytearray(0x50)
|
|
payload[0x04:0x14] = [0x31]*16
|
|
payload[0x1E] = 0x01
|
|
payload[0x2D] = 0x01
|
|
payload[0x30:0x36] = "Test 1".encode()
|
|
|
|
response = self.send_packet(0x65, payload)
|
|
check_error(response[0x22:0x24])
|
|
payload = self.decrypt(response[0x38:])
|
|
|
|
key = payload[0x04:0x14]
|
|
if len(key) % 16 != 0:
|
|
return False
|
|
|
|
self.id = int.from_bytes(payload[:0x4], "little")
|
|
self.update_aes(key)
|
|
return True
|
|
|
|
def hello(self, local_ip_address=None) -> bool:
|
|
"""Send a hello message to the device.
|
|
|
|
Device information is checked before updating name and lock status.
|
|
"""
|
|
responses = scan(
|
|
timeout=self.timeout,
|
|
local_ip_address=local_ip_address,
|
|
discover_ip_address=self.host[0],
|
|
discover_ip_port=self.host[1],
|
|
)
|
|
try:
|
|
devtype, host, mac, name, is_locked = next(responses)
|
|
except StopIteration:
|
|
raise exception(-4000) # Network timeout.
|
|
|
|
if (devtype, host, mac) != (self.devtype, self.host, self.mac):
|
|
raise exception(-2040) # Device information is not intact.
|
|
|
|
self.name = name
|
|
self.is_locked = is_locked
|
|
return True
|
|
|
|
def ping(self) -> None:
|
|
"""Ping the device.
|
|
|
|
This packet feeds the watchdog timer of firmwares >= v53.
|
|
Useful to prevent reboots when the cloud cannot be reached.
|
|
It must be sent every 2 minutes in such cases.
|
|
"""
|
|
ping(self.host[0], port=self.host[1])
|
|
|
|
def get_fwversion(self) -> int:
|
|
"""Get firmware version."""
|
|
packet = bytearray([0x68])
|
|
response = self.send_packet(0x6A, packet)
|
|
check_error(response[0x22:0x24])
|
|
payload = self.decrypt(response[0x38:])
|
|
return payload[0x4] | payload[0x5] << 8
|
|
|
|
def set_name(self, name: str) -> None:
|
|
"""Set device name."""
|
|
packet = bytearray(4)
|
|
packet += name.encode("utf-8")
|
|
packet += bytearray(0x50 - len(packet))
|
|
packet[0x43] = self.is_locked
|
|
response = self.send_packet(0x6A, packet)
|
|
check_error(response[0x22:0x24])
|
|
self.name = name
|
|
|
|
def set_lock(self, state: bool) -> None:
|
|
"""Lock/unlock the device."""
|
|
packet = bytearray(4)
|
|
packet += self.name.encode("utf-8")
|
|
packet += bytearray(0x50 - len(packet))
|
|
packet[0x43] = bool(state)
|
|
response = self.send_packet(0x6A, packet)
|
|
check_error(response[0x22:0x24])
|
|
self.is_locked = bool(state)
|
|
|
|
def get_type(self) -> str:
|
|
"""Return device type."""
|
|
return self.type
|
|
|
|
def send_packet(self, packet_type: int, payload: bytes) -> bytes:
|
|
"""Send a packet to the device."""
|
|
self.count = ((self.count + 1) | 0x8000) & 0xFFFF
|
|
packet = bytearray(0x38)
|
|
packet[0x00:0x08] = bytes.fromhex("5aa5aa555aa5aa55")
|
|
packet[0x24:0x26] = self.devtype.to_bytes(2, "little")
|
|
packet[0x26:0x28] = packet_type.to_bytes(2, "little")
|
|
packet[0x28:0x2a] = self.count.to_bytes(2, "little")
|
|
packet[0x2a:0x30] = self.mac[::-1]
|
|
packet[0x30:0x34] = self.id.to_bytes(4, "little")
|
|
|
|
p_checksum = sum(payload, 0xBEAF) & 0xFFFF
|
|
packet[0x34:0x36] = p_checksum.to_bytes(2, "little")
|
|
|
|
padding = (16 - len(payload)) % 16
|
|
payload = self.encrypt(payload + bytes(padding))
|
|
packet.extend(payload)
|
|
|
|
checksum = sum(packet, 0xBEAF) & 0xFFFF
|
|
packet[0x20:0x22] = checksum.to_bytes(2, "little")
|
|
|
|
with self.lock and socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as conn:
|
|
timeout = self.timeout
|
|
start_time = time.time()
|
|
|
|
while True:
|
|
time_left = timeout - (time.time() - start_time)
|
|
conn.settimeout(min(1, time_left))
|
|
conn.sendto(packet, self.host)
|
|
|
|
try:
|
|
resp = conn.recvfrom(2048)[0]
|
|
break
|
|
except socket.timeout:
|
|
if (time.time() - start_time) > timeout:
|
|
raise exception(-4000) # Network timeout.
|
|
|
|
if len(resp) < 0x30:
|
|
raise exception(-4007) # Length error.
|
|
|
|
checksum = int.from_bytes(resp[0x20:0x22], "little")
|
|
if sum(resp, 0xBEAF) - sum(resp[0x20:0x22]) & 0xFFFF != checksum:
|
|
raise exception(-4008) # Checksum error.
|
|
|
|
return resp
|