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":