extras/packetforge/Edge.py

   1 # Copyright (c) 2022 Intel and/or its affiliates.
   2 # Licensed under the Apache License, Version 2.0 (the "License");
   3 # you may not use this file except in compliance with the License.
   4 # You may obtain a copy of the License at:
   5 #
   6 #     http://www.apache.org/licenses/LICENSE-2.0
   7 #
   8 # Unless required by applicable law or agreed to in writing, software
   9 # distributed under the License is distributed on an "AS IS" BASIS,
  10 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11 # See the License for the specific language governing permissions and
  12 # limitations under the License.
  13
  14 from EdgeAction import *
  15 import json
  16
  17
  18 class Edge:
  19     def __init__(self):
  20         self.JSON = None
  21         self.Start = None
  22         self.End = None
  23         self.actionList = []
  24
  25     def Create(jsonfile):
  26         f = open(jsonfile, "r", encoding="utf-8")
  27         token = json.load(f)
  28
  29         if token == None:
  30             return None
  31
  32         if token["type"] != "edge":
  33             return None
  34
  35         edgeList = []
  36
  37         startNodes = token["start"]
  38         endNodes = token["end"]
  39
  40         if startNodes == None or endNodes == None:
  41             return None
  42
  43         startTokens = startNodes.split(",")
  44         endTokens = endNodes.split(",")
  45
  46         for start in startTokens:
  47             for end in endTokens:
  48                 edge = Edge()
  49
  50                 edge.Start = start
  51                 edge.End = end
  52
  53                 if "actions" in token:
  54                     for at in token["actions"]:
  55                         action = EdgeAction.Create(at)
  56                         if not action:
  57                             return None
  58
  59                         edge.actionList.append(action)
  60
  61                 edge.JSON = jsonfile
  62                 edgeList.append(edge)
  63
  64         return edgeList
  65
  66     def Apply(self, first, second):
  67         exp = []
  68
  69         for i in range(len(self.actionList)):
  70             act = self.actionList[i]
  71
  72             if act.FromStartObject == True:
  73                 exp.append(first.GetValue(act.FromExpression))
  74             elif act.FromStartObject == False:
  75                 exp.append(second.GetValue(act.FromExpression))
  76             else:
  77                 exp.append(act.FromExpression)
  78
  79         for i in range(len(exp)):
  80             act = self.actionList[i]
  81
  82             if act.ToStartObject:
  83                 first.SetFieldAuto(act.ToExpression, exp[i])
  84             else:
  85                 second.SetFieldAuto(act.ToExpression, exp[i])
  86
  87     def Actions(self):
  88         return self.actionList
  89
  90     def Name(self):
  91         return self.Start + "_" + self.End