def prepare_frame_gbn(frame, sn):
sn = sn % (window_size + 1)
sn = bin(sn)
sn = sn[2:].zfill(3)
frame = str(sn) + frame
# CRC application
crcframe = err.crc([frame], err.generator_poly, frame_size)
return crcframe[0]
def write_crc(list_of_frames, generator, error_list_frames, error_bit_list):
list_of_frames2=err.crc(list_of_frames=list_of_frames, generator=err.generator_poly, no_of_bits=err.no_of_bits)[:]
# Printing the frames
print('Codeword frames sent:')
print(list_of_frames2)
# Inserting error
for i in range(len(error_list_frames)):
list_of_frames2=ins_error(list_of_frames2, error_list_frames[i], error_bit_list[i])
with open('crc_op.txt', 'w') as f:
for item in list_of_frames2:
f.write("%s" % item)
def generateAck_gbn(ackno):
# Generate crc appended code
crcframe = err.crc([ackno], err.generator_poly, frame_size)
return crcframe[0]
def generateAck(rn):
# Generate crc appended code
ack = bin(rn)[2:]
crcframe = err.crc([ack], err.generator_poly, frame_size)
return crcframe[0]
def prepare_frame(frame, sn):
frame = str(sn) + frame
# CRC application
crcframe = err.crc([frame], err.generator_poly, frame_size)
return crcframe[0]
