print("\nENTER THE SIZE OF EACH DATAWORD:") div = int(input()) print("\n") # read the codeword and break it into dataword getDword(codeward, div) #div --> size of each data frame # collect the dataword into a list L = readMsg() # VRC and send codeword L = VRCutil(L) # write the message to data.txt writeMsg(L) print(">>Sending........\n") print("IF YOU WANT TO INJECT ERRORS PRESS 'y' ELSE PRESS 'n' ") eflag = input() if eflag == 'y': injectError() else: print("NO ERROR IS INJECTED ") print("\nDATA HAS BEEN PASSED TO RECEIVER SIDE SUCCESSFULLY\n") print("PRESS r TO ENTER TO RECEIVER SIDE:") flag = input() print("\nloading.......\n") if flag == 'r': print("\n--------------RECEIVER----------------") else: print("THANK YOU,HAPPY CODING :)") exit() print("RECEIVED MESSAGE IS : ") rCodeword = getFullMsg('data.txt') # received codeword print(rCodeword) # VRC and check
temp = s.recv(1518) temp = unpacker(temp) buffer[j] = temp time.sleep(1) i = n counter = 0 time1 = time.time() TIMEOUT = 3 switch = 0 while counter < f: # send ack for correct data frame and nack for incorrect data frame # 0 denotes no error 1 denotes error # error = random.randint(0,1) # Check CRC valid = injectError(buffer[counter % n]) error = CRCcheck(valid, polynomial) # ----> 1 represent error and 0 represent no error <----# e = str(error) # send the ack # random time delay <--------------------------------------> a = random.randint(0, 3) time.sleep(a) print("Time: ", a) # <--------------------------------------------------------> # if timeout happens nothing is being sent if a < 3: s.send(e.encode()) else: error = 1
print(s_name) # Sender end Connection f = s.recv(1518) f = f.decode() f = int(f) while True: counter = 0 message = [] polynomial = '1011' while counter < f: # receive the data packet temp = s.recv(1518) temp = unpacker(temp) # Injecting error temp = injectError(temp) # Data Validation error = CRCcheck(temp, polynomial) # random time delay a = random.randint(0, 4) time.sleep(a) print("Time Delay Encountered is: ", a) # 0 for error and 1 for no error e = str(error) # if timeout happens nothing is being sent if a < 3: s.send(e.encode()) else: error = 1 if a < 3: if e != "1":