ignore duplicate IP

Author: xhdix

utils/trace.py

@@ -487,7 +487,7 @@ def trace_route(
         else:
             request_ips.append(request_packet_1[IP].dst)
         if have_2_packet:
-            if request_packet_2[IP].dst != "" or request_packet_2[IP].dst != LOCALHOST:
+            if request_packet_1[IP].dst not in ["", LOCALHOST, request_ips[0]]:
                 request_ips.append(request_packet_2[IP].dst)
     else:
         request_ips = ip_list