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tcp-server.py
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from google.cloud import storage
import sys
from socket import socket, getfqdn, AF_INET, SOCK_DGRAM, SOCK_STREAM, INADDR_ANY
from threading import Thread, Lock
from _thread import *
import datetime
import hashlib
if len(sys.argv) < 2:
print("error: give the key file")
sys.exit(0)
clients = 0
client_lock = Lock()
registry = [] #stores tuples of (ID, MAC, IP, PSPH, PORT)
registry_lock = Lock()
data_msg = ""
data_msg_lock = Lock()
j = open(sys.argv[1], "r")
if not j:
print("Error, invalid JSON file")
sys.exit(0)
j_str = j.read()
f = open("Activity.log", "a")
def register_device(args, addr): #args = (REGISTER, ID, PSPH, MAC)
if args[3].endswith("\0"):
args[3] = args[3][:-1]
registry_lock.acquire()
for x in range(len(registry)):
if registry[x][0] == args[1]: #match ID
if registry[x][2] == addr[0]: #and matches IP
registry_lock.release()
return "12" #ACK of 12: IP reused
elif registry[x][1] == args[3]: #matches MAC, updates IP
registry[x] = (registry[x][0], registry[x][1], addr[0], registry[x][3], registry[x][4])
registry_lock.release()
return "02"
else:
registry_lock.release()
return "01" #ID already exists
elif registry[x][1] == args[3]: #Match MAC but different ID
registry_lock.release()
return "13"
registry.append((args[1], args[3], addr[0], args[2], "-65535"))
print(registry)
registry_lock.release()
return "00"
def deregister(args, addr): #args = (DEREGISTER, ID, PSPH, MAC)
if args[3].endswith("\0"):
args[3] = args[3][:-1]
registry_lock.acquire()
for x in range(len(registry)):
if registry[x][0] == args[1]:
if registry[x][1] != args[3]:
registry_lock.release()
return "30"
else:
registry.pop(x)
registry_lock.release()
return "20"
else:
registry_lock.release()
return "21"
def login(args, addr): #args = (LOGIN, ID, PSPH, MAC)
registry_lock.acquire()
for x in range(len(registry)):
if registry[x][0] == args[1] and registry[x][3] == args[2]:
registry[x] = (registry[x][0], registry[x][1], registry[x][2], registry[x][3], args[4])
print(registry)
registry_lock.release()
return "70"
return "31"
def logoff(args, addr): #args = (LOGOFF, ID)
registry_lock.acquire()
for x in range(len(registry)):
if registry[x][0] == args[1]:
registry[x] = (registry[x][0], registry[x][1], registry[x][2], registry[x][3], "-65535")
registry_lock.release()
return "80"
return "32"
def query(args, addr): #args = (QUERY, QCODE, ID, TIME, PARAM)
if args[4].endswith("\0"):
args[4] = args[4][:-1]
if args[1] == "01": # PARAM = Dev ID to search
registry_lock.acquire()
for x in registry:
if x[0] == args[4]:
if x[4] != "-65535":
registry_lock.release()
return ("01", x[0], x[2]+"\n"+x[4])
else:
registry_lock.release()
return ("11", x[0], x[4])
registry_lock.release()
return ("11", args[4], "-65535")
elif args[1] == "02": # PARAM = TOKEN
registry_lock.acquire()
for x in registry:
if x[0] == args[2]:
if x[4] != "-65535":
registry_lock.release()
return ("01", x[0], x[2]+"\n"+j_str)
else:
registry_lock.release()
return ("11", x[0], x[4])
registry_lock.release()
return ("11", args[4], "-65535")
elif args[1] == "03": # PARAM = TOKEN
registry_lock.acquire()
for x in registry:
if x[0] == args[2]:
if x[4] != "-65535":
registry_lock.release()
data_msg_lock.acquire()
value = data_msg
print("out value: " + value)
data_msg_lock.release()
return ("01", x[0], x[2]+"\n"+value)
else:
registry_lock.release()
return ("11", x[0], x[4])
registry_lock.release()
return ("11", args[4], "-65535")
def data(args, addr): #args = (DATA, QCODE, ID, TIME, LENGTH, MESSAGE)
global data_msg
registry_lock.acquire()
for x in range(len(registry)):
if registry[x][0] == args[2]:
now = datetime.datetime.now()
out = "{0:%Y-%m-%d %H:%M:%S}".format(now) + " Logged data: " + args[5][:-1] + "\n"
f.write(out)
registry_lock.release()
data_msg_lock.acquire()
data_msg = args[5][:-1]
# print("Data = %s" % data_msg)
data_msg_lock.release()
return "50"
return "51"
def process_ack(msg, addr):
new_msg = msg.split('\t')
if new_msg[0] == 'REGISTER':
if not len(new_msg) == 4:
return False
else:
return (register_device(new_msg, addr) , new_msg[1], datetime.datetime.now(), "ACK")
elif new_msg[0] == 'DEREGISTER':
if len(new_msg) != 4:
return False
else:
return (deregister(new_msg, addr), new_msg[1], datetime.datetime.now(), "ACK")
elif new_msg[0] == "LOGIN":
if len(new_msg) != 5:
return False
else:
return (login(new_msg, addr), new_msg[1], datetime.datetime.now(), "ACK")
elif new_msg[0] == "LOGOFF":
if len(new_msg) != 2:
return False
else:
return (logoff(new_msg, addr), new_msg[1], datetime.datetime.now(), "ACK")
elif new_msg[0] == "QUERY":
if len(new_msg) != 5:
return False
else:
return (query(new_msg, addr), new_msg[2], datetime.datetime.now(), "DATA")
elif new_msg[0] == "DATA":
if len(new_msg) != 6:
return False
else:
return (data(new_msg, addr), new_msg[2], datetime.datetime.now(), "ACK")
def getmac(msg):
args = msg.split('\t')
registry_lock.acquire()
for x in registry:
if x[0] == args[1]:
ret_mac = x[1]
registry_lock.release()
return ret_mac
def client_handler(client, addr, number):
while True:
data = client.recv(1024)
if not data:
print("client[", number, "] has exited")
break
msg = data.decode('ascii')
sha = hashlib.sha256(data).hexdigest()
print("From client[", number, "]:", msg)
ack = process_ack(msg, addr)
if ack[3] == "ACK":
if ack[0] == "30":
ret_mac = getmac(msg)
send_msg = "ACK\t" + ack[0] + "\t" + ack[1] + "\t{0:%Y-%m-%d %H:%M:%S}\t".format(ack[2]) + sha + "\t" + ret_mac + "\0"
else:
send_msg = "ACK\t" + ack[0] + "\t" + ack[1] + "\t{0:%Y-%m-%d %H:%M:%S}\t".format(ack[2]) + sha + "\0"
elif ack[3] == "DATA":
if ack[0][2] == "-65535":
send_msg = "DATA\t" + ack[0][0] + "\t" + ack[1] + "\t{0:%Y-%m-%d %H:%M:%S}\t".format(ack[2]) + "%d" % len(ack[0][1]) + "\t" + ack[0][1] + "\0"
else:
send_msg = "DATA\t" + ack[0][0] + "\t" + ack[1] + "\t{0:%Y-%m-%d %H:%M:%S}\t".format(ack[2]) + "%d" % (len(ack[0][1])+len(ack[0][2]) + 1) + "\t" + ack[0][1] + "\n" + ack[0][2] + "\0"
print(send_msg)
client.send(send_msg.encode('ascii'))
if ack[3] == "ACK" and ack[0] == "70":
send_msg = "QUERY\t00\t" + ack[0] + "\t" + "\t{0:%Y-%m-%d %H:%M:%S}\t".format(ack[2]) + "msg\0"
client.send(send_msg.encode('ascii'))
c.close()
def cloud_handler(cloud, dummy):
cloud = storage.Client.from_service_account_json('Key.json')
bucket = cloud.get_bucket('triple-circle-237521.appspot.com')
old_blobs_time=False
while 1:
blobs_time = []
blobs1 = bucket.list_blobs()
blobs = [a for a in blobs1]
for x in range(len(blobs)):
blobs_time.append(blobs[x].updated)
if old_blobs_time != False:
for x in range(len(blobs)):
if blobs_time[x] != old_blobs_time[x]:
data = blobs[x].download_as_string().decode('utf-8')
print("%s Hass been updated" % blobs[x].public_url)
# print(data) # Technically where it should process this data, but this doesn't matter to me that much.
old_blobs_time = blobs_time
s = socket(AF_INET, SOCK_STREAM)
s.bind(('0.0.0.0', 8900))
s.listen(5)
print("server at %s" % getfqdn(''))
start_new_thread(cloud_handler, (0,0))
while True:
c, addr = s.accept()
print("Connection from: ", addr[0], ":", addr[1])
client_lock.acquire()
start_new_thread(client_handler, (c, addr, clients))
clients = clients + 1
client_lock.release()
s.close()