feat(dscp): implemented multiple dscps per user

sender.py

@@ -35,7 +35,7 @@ def main():
     parser.add_argument("--log-level", type=str, default="INFO")
     parser.add_argument("--bandwidth", type=str, default="1Mbps")
     parser.add_argument("--duration", type=int, default=10)
-    parser.add_argument("--dscp", type=str, default="")
+    parser.add_argument("--dscp", action='append', default=[])
     args = parser.parse_args()
     logger.remove()
     logger.add(sys.stderr, level=args.log_level)
@@ -44,16 +44,25 @@ def main():
     time_between_packets = PACKET_SIZE / bandwidth
     packet_cnt = 0
     logger.info(f"Connecting to {args.host}:{args.port}")
-    sock = socket(AF_INET, SOCK_DGRAM)
-    dscp = int(args.dscp) if args.dscp else 0
+    
+
+    sockets = []
+    dscp = [int(x) for x in args.dscp]
     if dscp:
-        sock.setsockopt(IPPROTO_IP, IP_TOS, dscp << 2)
+        for value in dscp:
+            sock = socket(AF_INET, SOCK_DGRAM)
+            sock.setsockopt(IPPROTO_IP, IP_TOS, value << 2)
+            sockets.append(sock)
+    else:
+        sock = socket(AF_INET, SOCK_DGRAM)
+        sockets.append(sock)
     CODE_WORD = "CAFEABBA"
     payload = (CODE_WORD + "A" * (PACKET_SIZE - len(CODE_WORD))).encode()
     t0 = time.time()
     while True:
         logger.debug("Sending message:")
-        sock.sendto(payload, (args.host, args.port))
+        for sock in sockets:
+            sock.sendto(payload, (args.host, args.port))
         packet_cnt += 1
         t1 = time.time() - t0
         if t1 > args.duration: