A lot of progress, but still not tested

bTCP_client.py

 #!/usr/local/bin/python3
-import socket, argparse, random
-from struct import *
+import argparse
+import socket
+import struct
+
+import btcp
 
-#Handle arguments
 parser = argparse.ArgumentParser()
 parser.add_argument("-w", "--window", help="Define bTCP window size", type=int, default=100)
 parser.add_argument("-t", "--timeout", help="Define bTCP timeout in milliseconds", type=int, default=100)
-parser.add_argument("-i","--input", help="File to send", default="tmp.file")
+parser.add_argument("-i", "--input", help="File to send", default="tmp.file")
 args = parser.parse_args()
 
-destination_ip = "127.0.0.1"
-destination_port = 9001
-
-#bTCP header
-header_format = "I"
-bTCP_header = pack(header_format, randint(0,100))
-bTCP_payload = ""
-udp_payload = bTCP_header
+binding = btcp.Binding(socket.AF_INET, ("", 9002), args.window, args.timeout)
+connection = binding.connect_client(0, 0, ("", 9001))
 
-#UDP socket which will transport your bTCP packets
-sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
+file = open(args.input, "rb")
+data = file.read()
+file.close()
 
-#send payload
-sock.sendto(udp_payload, (destination_ip, destination_port))
+connection.send(struct.pack("!Q", len(data)))
+connection.send(data)
+binding.close()

bTCP_server.py

 #!/usr/local/bin/python3
-import socket, argparse
-from struct import *
+import argparse
+import socket
+import struct
 
-#Handle arguments
+import btcp
+
+# Handle arguments
 parser = argparse.ArgumentParser()
 parser.add_argument("-w", "--window", help="Define bTCP window size", type=int, default=100)
 parser.add_argument("-t", "--timeout", help="Define bTCP timeout in milliseconds", type=int, default=100)
-parser.add_argument("-o","--output", help="Where to store file", default="tmp.file")
+parser.add_argument("-o", "--output", help="Where to store file", default="tmp.file")
 args = parser.parse_args()
 
-server_ip = "127.0.0.1"
-server_port = 9001
+binding = btcp.Binding(socket.AF_INET, ("", 9001), args.window, args.timeout)
+server = binding.bind_server(0)
+
+server.start_listen(1)
+connection = server.accept()
 
-#Define a header format
-header_format = "I"
+file_size: int = struct.unpack("!Q", connection.receive(8))[0]
 
-sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) # UDP
-sock.bind((server_ip, server_port))
+file = open(args.output, "wb")
+while file_size > 0:
+    data = connection.receive_all()
+    file.write(data)
+    file_size -= len(data)
+file.close()
 
-while True:
-    data, addr = sock.recvfrom(1016)
-    print(unpack(header_format,data))
+binding.close()