extras/packetforge/NodeField.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 import ExpressionConverter
  15 from InputFormat import *
  16
  17
  18 class NodeField:
  19     def __init__(self):
  20         self.DefaultValue = None
  21         self.IsReserved = None
  22         self.IsReadonly = None
  23         self.IsAutoIncrease = None
  24         self.IsIncreaseLength = None
  25         self.Optional = None
  26         self.VariableSize = None
  27
  28     def Create(token):
  29         if token == None:
  30             return None
  31
  32         field = NodeField()
  33
  34         if token["name"] == None:
  35             return None
  36         if token["size"] == None:
  37             return None
  38
  39         # name
  40         field.Name = token["name"]
  41
  42         if field.Name == "reserved":
  43             field.IsReserved = True
  44
  45         inputFormat = InputFormat.bytearray
  46         res, u16 = ExpressionConverter.ToNum(token["size"])
  47
  48         # size
  49         if res:
  50             field.Size = u16
  51             if u16 <= 8:
  52                 inputFormat = InputFormat.u8
  53             elif u16 <= 16:
  54                 inputFormat = InputFormat.u16
  55             elif u16 <= 32:
  56                 inputFormat = InputFormat.u32
  57             elif u16 <= 64:
  58                 inputFormat = InputFormat.u64
  59             else:
  60                 inputFormat = InputFormat.bytearray
  61         else:
  62             field.Size = 0
  63             field.VariableSize = token["size"]
  64
  65         if "format" in token and token["format"] != None:
  66             inputFormat = InputFormat[token["format"]]
  67
  68         field.Format = inputFormat
  69
  70         if "default" in token and token["default"] != None:
  71             field.DefaultValue = token["default"]
  72             ret, _ = ExpressionConverter.Verify(field.Format, field.DefaultValue)
  73             if not ret:
  74                 return None
  75
  76         if "readonly" in token and token["readonly"] == "true" or field.IsReserved:
  77             field.IsReadonly = True
  78         if "autoincrease" in token and token["autoincrease"] == "true":
  79             field.IsAutoIncrease = True
  80             field.IsReadonly = True
  81         if "increaselength" in token and token["increaselength"] == "true":
  82             field.IsIncreaseLength = True
  83         if "optional" in token:
  84             field.Optional = token["optional"]
  85
  86         return field