# Get command line arguments
server_host = 'localhost'
port = int(sys.argv[1])
send_file = sys.argv[2]
window_size = 8
tempfile = 'tempfile.txt'
# Set the maximum buffer size
max_buff = 65535
# Setup CRC
crc = CRC()
data_pkt = namedtuple('data_pkt', 'seq_num frame')
ack_pkt = namedtuple('ack_pkt', 'seq_num ack')
# Encode the frames
frames = crc.encode(open(send_file, 'r').read())
# Setup global vars
total_frames = len(frames)
ack_recv_till = 0
seq_no_to_send = 0
status = {
'transfer_complete': False,
'window_low': 0,
'window_high': window_size - 1,
}
pickle.dump(status, open(tempfile, 'wb'))
# COMMS
client_socket = socket(AF_INET, SOCK_DGRAM)
# Thread to handle ACKS
sys.exit(0)
else:
# This is the child process (sender)
encoder = CRC()
os.close(r_chan)
os.close(w_ack)
w_chan = os.fdopen(w_chan, 'w')
r_ack = os.fdopen(r_ack)
print("Child writing")
# Read file to send
with open('input.txt', 'r') as f:
text = f.read()
# Send the length
frames = encoder.encode(text=text, verbose=True)
length = str(len(frames)) + '\n'
print(length)
os.write(w_chan, length)
r_ack.readline()[:-1]
print('lol')
# Sending process
i = 0
while i < len(text):
w_chan.write(text[i])
print('lol2')
ack = r_ack.read()
print(ack)
if ack == '1':
i -= 1