chat_kunalvarudkarv1.2.py

from socket import * #library for using socket programming
import netifaces as ni  # library for getting localhost ip address
from simplecrypt import encrypt,decrypt #for encrypting and decrypting
from binascii import hexlify #unwanted library

#host=raw_input("Enter your IP Address=")
port=50000 #deafult port no
password = "1"
soc=socket(AF_INET,SOCK_STREAM)  #defined transmission mechanism ans type of protocol
soc.setsockopt(SOL_SOCKET,SO_REUSEPORT,1) #defined the socket options

# menu driven
choice=input("1. Want to be Server\n2. Want to be Cient\nEnter your choice=")
if choice==1:

     #getting our localhost ip address
    ni.ifaddresses('eth0')
    host = ni.ifaddresses('eth0')[ni.AF_INET][0]['addr']  #storing in variable "host"

    print "Server IP:"+str(host)
    soc.bind((host, port)) #binding host and port
    soc.listen(1)  #listening to only single request from client
    print("listening on port:" + str(port))
    print ("waiting for incoming connection.....")

    while True: #infinite loop
        c,addr=soc.accept() #accepting the conn form client
        print("Got connection from:"+str(addr[0])+"at Port No:"+str(addr[1]))
        c.send("Your are connected to" +str(host))

        while True:

            temp_buff = raw_input("Server:") #create temp buffer for sending messages !
            ciphertext = encrypt(password, temp_buff.encode('utf8'))


            if temp_buff == 'Finish': #checking the terminaltion WORD ->"Finish"
                c.send("Connection terminated !!! Server Offline")
                c.send(ciphertext)
                exit()
            else:
                c.send(ciphertext)
                temp_buff=""  #flushing to NULL
                cmsg=c.recv(4028)
                plaintext = decrypt(password, cmsg)
                #ncmsg = plaintext.decode('utf8')
                if plaintext=='Finish':
                    exit()
                else:
                    print "CLIENT:"+str(plaintext)
            #c.close()

elif choice==2:
    host=raw_input("Enter server's IP address to connect=")
    #print "Sending request to:"+host
    soc.connect((host,port))

    print soc.recv(4028)
    while True:
     temp_buff=raw_input("Client:")
     ciphertext = encrypt(password, temp_buff.encode('utf8'))
     if temp_buff == 'Finish':
        soc.send("Connection terminated !! client offline !! ")
        soc.send(ciphertext)
        exit()
     else:
         soc.send(ciphertext)
         temp_buff=""
         smsg=soc.recv(4028)
         plaintext = decrypt(password, smsg)
         #nsmsg = plaintext.decode('utf8')
         if plaintext == 'Finish':
             exit()
         else:
            print "SERVER:"+str(plaintext)
    #soc.close()

else :
    exit()