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crossxtalk_server.py
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crossxtalk_server.py
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#!/usr/bin/env python
import socket, threading
from Queue import Queue
MSGLEN = 1024*4
class ClientThread(threading.Thread):
username =""
ip = ""
port = 0
q =""
rating = 50
known_users = []
num_of_rating = 0
disconnect=False
def __init__(self,ip,port,socket):
threading.Thread.__init__(self)
self.ip = ip
self.port = port
self.socket = socket
print "[+] New thread started for "+ip+":"+str(port)
def send(self, msg):
while len(msg) < MSGLEN:
msg += ' '
totalsent = 0
while(totalsent<len(msg)):
sent = self.socket.send(msg[totalsent:])
if sent == 0:
raise RuntimeError("socket connection broken")
totalsent += sent
def receive(self):
msg = ""
size = MSGLEN
while len(msg) < size:
chunk = self.socket.recv(size-len(msg))
if chunk == "":
raise RuntimeError("socket connection broken")
msg = msg + chunk
return msg
def do_get_size_of_stream(self, data):
(pre, sep, username) = data.partition("STREAM ")
(username, sep, after) = username.partition(" ")
found=False
for usernames, queue in self.known_users:
if(usernames==username):
found=True
if(queue.qsize()>0):
self.send("0x%08x"%(queue.qsize()*0x1000))
else:
self.send("0x00000000")
break
if(found==False):
self.send("0x00000000")
def do_get_stream(self, data):
(pre, sep, data) = data.partition("STREAM ")
(username, sep, data) = data.partition(" ")
(numbytes, sep, data) = data.partition(" ")
numbytes = int(numbytes, 16)
found=False
for usernames, queue in self.known_users:
if(usernames==username):
found=True
if(queue.qsize()*MSGLEN>=numbytes):
buf = queue.get()
queue.task_done()
self.send(buf)
else:
self.send('')
if(not found):
self.send('')
def do_send_stream_from_client(self, data):
(pre, sep, data) = data.partition("STREAM ")
(numbytes, sep, data) = data.partition(" ")
(username, sep, data) = data.partition(" ")
self.send("OK")
wf = self.receive()
self.username = username
if(len(self.known_users)==0):
for t in threads:
if(t.username != self.username):
self.known_users.append((t.username, Queue()))
for t in threads:
if(t.username != self.username):
previously_known=False
for other_username, queue in t.known_users:
if(other_username==username):
queue.put(wf)
previously_known=True
if(not previously_known):
newqueue = Queue()
t.known_users.append((username, newqueue))
newqueue.put(wf)
def get_user_info(self, data):
(pre, sep, index) = data.partition("INFO ")
(index, sep, remaining) = index.partition(" ")
index = int(index, 16)
if(index<len(threads) and len(self.known_users)>0):
found_username=False
for usernames, queue in self.known_users:
if(usernames==threads[index].username):
found_username=True
if(queue.qsize()>0):
self.send("%s 0x%08x 0%08x" % (usernames, threads[index].rating, 1 ))
else:
self.send("%s 0x%08x 0%08x" % (usernames, threads[index].rating, 0 ))
break
if(found_username==False):
self.send("none 0 0")
elif(len(self.known_users)==0 and index<len(threads)):
self.send("%s 0x%08x 0" %(self.username, threads[index].rating))
else:
self.send("none 0 0")
def get_num_of_threads(self, data):
self.send("0x%08x"%len(threads))
def disconnect_user(self, data):
(pre, sep, userinfo) = data.partition("USER ")
(user, sep, remaining) = userinfo.partition(" ")
found_username = False
self.send("OK")
for t in threads:
if user == t.username:
t.sock.close()
t.disconnect=True
break
def set_user_info(self, data):
(pre, sep, data) = data.partition("RATING ")
(username, sep, data) = data.partition(" ")
(rating, sep, data) = data.partition(" ")
rating = int(rating, 16)
found_username=False
for x in range(len(threads)):
if(threads[x].username==username && threads[x].username!=self.username):
found_username=True
if(threads[x].num_of_rating < 5):
threads[x].num_of_rating = threads[x].num_of_rating+1
threads[x].rating = rating
break
top = 0
bottom = 0
for x in range(len(threads)):
if(threads[x].username!=self.username):
top += (1-((5-threads[x].num_of_rating)/5))*threads[x].rating
bottom += (1-((5-threads[x].num_of_rating)/5))
self.rating = top/bottom
self.send("OK")
def run(self):
print "Connection from : "+ip+":"+str(port)
data = " "
while(len(data)>0 and self.disconnect==False):
data = self.receive()
if(data.startswith("GET BYTES READY ON STREAM ")):
self.do_get_size_of_stream(data)
if(data.startswith("GET FROM STREAM ")):
self.do_get_stream(data)
if(data.startswith("SEND TO STREAM ")):
self.do_send_stream_from_client(data)
if(data.startswith("GET NUMBER OF USERS")):
self.get_num_of_threads(data)
if(data.startswith("GET USER INFO ")):
self.get_user_info(data)
if(data.startswith("BAN USER ")):
self.disconnect_user(data)
if(data.startswith("UPDATE RATING ")):
self.set_user_info(data)
print "Client disconnected..."
host = "0.0.0.0"
port = 6000
tcpsock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
tcpsock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
tcpsock.bind((host,port))
threads = []
while True:
tcpsock.listen(4)
print "\nListening for incoming connections..."
(sock, (ip, port)) = tcpsock.accept()
newthread = ClientThread(ip, port, sock)
newthread.start()
threads.append(newthread)
for t in threads:
t.join()