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connector.py
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#from past.builtins import basestring
import socket
import struct
import json
import datetime
class XiaomiConnector:
"""Connector for the Xiaomi Mi Hub and devices on multicast."""
MULTICAST_PORT = 9898
SERVER_PORT = 4321
MULTICAST_ADDRESS = '224.0.0.50'
SOCKET_BUFSIZE = 1024
def __init__(self, data_callback=None, auto_discover=True):
"""Initialize the connector."""
self.data_callback = data_callback
self.last_tokens = dict()
self.socket = self._prepare_socket()
self.nodes = dict()
self.gnodes = dict()
self.gateways = set()
self.send_whois()
def _prepare_socket(self):
sock = socket.socket(socket.AF_INET, # Internet
socket.SOCK_DGRAM) # UDP
sock.bind(("0.0.0.0", self.MULTICAST_PORT))
mreq = struct.pack("=4sl", socket.inet_aton(self.MULTICAST_ADDRESS),
socket.INADDR_ANY)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 32)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_LOOP, 1)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_RCVBUF,
self.SOCKET_BUFSIZE)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_ADD_MEMBERSHIP, mreq)
return sock
def check_incoming(self):
"""Check incoming data."""
data, addr = self.socket.recvfrom(self.SOCKET_BUFSIZE)
try:
payload = json.loads(data.decode("utf-8"))
#print addr, ": ", payload
self.gateway_address = addr[0]
self.handle_incoming_data(payload)
except Exception as e:
raise
print("Can't handle message %r (%r)" % (data, e))
def handle_incoming_data(self, payload):
"""Handle an incoming payload, save related data if needed,
and use the callback if there is one.
"""
if isinstance(payload.get('data', None), basestring):
cmd = payload["cmd"]
if cmd in ["heartbeat", "report", "read_ack"]:
if self.data_callback is not None:
try:
self.data_callback(payload["model"],
payload["sid"],
payload["cmd"],
json.loads(payload["data"]))
except KeyError, e:
print "KeyError", e
if cmd == "heartbeat" and payload["sid"] not in self.nodes:
#self.request_sids(payload["sid"])
self.nodes[payload["sid"]] = json.loads(payload["data"])
self.nodes[payload["sid"]]["model"] = payload["model"]
self.nodes[payload["sid"]]["sensors"] = []
self.nodes[payload["sid"]]["gateway_address"] = self.gateway_address
if "token" in payload:
self.last_tokens[payload["sid"]] = payload['token']
def request_sids(self, sid, ip):
"""Request System Ids from the hub."""
self.send_command({"cmd": "get_id_list", sid: sid}, ip)
def request_current_status(self, device_sid, ip):
"""Request (read) the current status of the given device sid."""
self.send_command({"cmd": "read", "sid": device_sid}, ip)
def send_command(self, data, addr = MULTICAST_ADDRESS, port=MULTICAST_PORT):
"""Send a command to the UDP subject (all related will answer)."""
#self.socket.sendto(json.dumps(data).encode("utf-8"), (addr, self.MULTICAST_PORT))
if type(data) is dict:
self.socket.sendto(json.dumps(data).encode("utf-8"), (addr, port))
#print "SEND dATA:", json.dumps(data).encode("utf-8")
else:
self.socket.sendto(data.encode("utf-8"), (addr, port))
#print "SEND dATA:", data.encode("utf-8")
def get_nodes(self):
"""Return the current discovered node configuration."""
return self.nodes
def get_token(self):
return self.last_tokens
def send_whois(self):
self.socket.sendto(json.dumps({"cmd":"whois"}).encode("utf-8"),
(self.MULTICAST_ADDRESS, self.SERVER_PORT))
endTime = datetime.datetime.now() + datetime.timedelta(seconds=5)
print "Waiting for replies (5s) ..."
while datetime.datetime.now() <= endTime:
data, addr = self.socket.recvfrom(self.SOCKET_BUFSIZE)
try:
payload = json.loads(data.decode("utf-8"))
#self.gateways.add(addr[0])
#self.gateway_address = addr[0]
except Exception as e:
raise
print("Can't handle message %r (%r)" % (data, e))
if payload["cmd"] == 'iam':
cmd = payload["cmd"]
if cmd == 'iam' and payload["sid"] not in self.nodes:
print addr, ": ", payload
#self.gateways.add(payload["ip"])
self.gnodes[payload["sid"]] = dict(model="gateway")
self.gnodes[payload["sid"]]['ip'] = payload["ip"]
#self.request_sids(payload["sid"])
for sid in self.gnodes:
gateway_ip = self.gnodes[sid]['ip']
self.request_sids(payload["sid"], gateway_ip)
endTime = datetime.datetime.now() + datetime.timedelta(seconds=2)
print "Waiting for replies (2s) ..."
while datetime.datetime.now() <= endTime:
data, addr = self.socket.recvfrom(self.SOCKET_BUFSIZE)
try:
payload = json.loads(data.decode("utf-8"))
#print addr, ": ", payload
except Exception as e:
raise
print("Can't handle message %r (%r)" % (data, e))
cmd = payload["cmd"]
if cmd == "get_id_list_ack" and payload["sid"] == sid:
device_sids = json.loads(payload["data"])
if payload["sid"] not in self.gnodes:
pass
#self.nodes[payload["sid"]] = dict(model=u'gateway')
else:
self.gnodes[payload["sid"]]["nodes"] = device_sids
if "token" in payload:
self.last_tokens[payload["sid"]] = payload['token']
print addr, ": ", payload
#print "NODES:", self.gnodes
break
for sid in self.gnodes:
if self.gnodes[sid]['model'] == 'gateway':
for sub_node in self.gnodes[sid]['nodes']:
#print sid, self.nodes[sid]['ip']
self.request_current_status(sub_node, self.gnodes[sid]['ip'])
endTime = datetime.datetime.now() + datetime.timedelta(seconds=2)
#print "Waiting for reply from ", sub_node
while datetime.datetime.now() <= endTime:
data, addr = self.socket.recvfrom(self.SOCKET_BUFSIZE)
try:
payload = json.loads(data.decode("utf-8"))
#print addr, ": ", payload
except Exception as e:
raise
print("Can't handle message %r (%r)" % (data, e))
cmd = payload["cmd"]
if cmd == "read_ack" and payload["sid"] not in self.nodes and sub_node == payload["sid"]:
try:
self.nodes[payload["sid"]] = dict(model=payload["model"])
self.nodes[payload["sid"]]["gateway_address"] = self.gnodes[sid]['ip']
self.nodes[payload["sid"]]["gateway_sid"] = sid
except KeyError, e:
print "KeyError", e
print addr, ": ", payload
#print "NODES:", len(self.nodes), self.nodes
break
self.nodes.update(self.gnodes)
#print "Final:", len(self.nodes)
#for i in self.nodes:
# print i, self.nodes[i]