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
  49                 edge = Edge()
  50
  51                 edge.Start = start
  52                 edge.End = end
  53
  54                 if "actions" in token:
  55                     for at in token["actions"]:
  56                         action = EdgeAction.Create(at)
  57                         if not action:
  58                             return None
  59
  60                         edge.actionList.append(action)
  61
  62                 edge.JSON = jsonfile
  63                 edgeList.append(edge)
  64
  65         return edgeList
  66
  67     def Apply(self, first, second):
  68         exp = []
  69
  70         for i in range(len(self.actionList)):
  71             act = self.actionList[i]
  72
  73             if act.FromStartObject == True:
  74                 exp.append(first.GetValue(act.FromExpression))
  75             elif act.FromStartObject == False:
  76                 exp.append(second.GetValue(act.FromExpression))
  77             else:
  78                 exp.append(act.FromExpression)
  79
  80         for i in range(len(exp)):
  81             act = self.actionList[i]
  82
  83             if act.ToStartObject:
  84                 first.SetFieldAuto(act.ToExpression, exp[i])
  85             else:
  86                 second.SetFieldAuto(act.ToExpression, exp[i])
  87
  88     def Actions(self):
  89         return self.actionList
  90
  91     def Name(self):
  92         return self.Start + "_" + self.End