Use a random squirrel id and an incremental nonce

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

squinnondation/hazel.py

@@ -1,6 +1,7 @@
 # Copyright (C) 2020 by eichhornchen, ÿnérant
 # SPDX-License-Identifier: GPL-3.0-or-later
 from datetime import datetime
+from random import randint
 from typing import Any, Tuple
 from ipaddress import IPv6Address
 from threading import Thread
@@ -17,6 +18,7 @@ class Hazelnut:
     """
     def __init__(self, nickname: str = None, address: str = "localhost", port: int = 2500):
         self.nickname = nickname
+        self.id = -1
 
         try:
             # Resolve DNS as an IPv6
@@ -37,6 +39,11 @@ class Squirrel(Hazelnut):
     """
     def __init__(self, instance: Any, nickname: str):
         super().__init__(nickname, instance.bind_address, instance.bind_port)
+
+        # Random identifier on 64 bits
+        self.id = randint(0, 1 << 64 - 1)
+        self.incr_nonce = 0
+
         # Create UDP socket
         self.socket = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
         # Bind the socket
@@ -175,7 +182,7 @@ class Squirrel(Hazelnut):
         elif key != "\n":
             # Insert the pressed key in the current message
             new_buffer = self.input_buffer[:self.input_index] + key + self.input_buffer[self.input_index:]
-            if len(DataTLV.construct(f"{self.nickname}: {new_buffer}")) > 255 - 8 - 4:
+            if len(DataTLV.construct(f"{self.nickname}: {new_buffer}", None)) > 255 - 8 - 4:
                 # The message is too long to be sent once. We don't allow the user to type any other character.
                 curses.beep()
                 return
@@ -194,7 +201,7 @@ class Squirrel(Hazelnut):
         msg = f"{self.nickname}: {msg}"
         self.add_message(msg)
 
-        pkt = Packet.construct(DataTLV.construct(msg))
+        pkt = Packet.construct(DataTLV.construct(msg, self))
         for hazelnut in list(self.hazelnuts.values()):
             self.send_packet(hazelnut, pkt)