ce4b645178
Add a new tool packetforge to extras. This tool is to support generic flow. Packetforge is a library to translate naming or json profile format flow pattern to the required input of generic flow, i.e. spec and mask. Using python script flow_create.py, it can add and enable a new flow rule for an interface via flow VAPI, and can delete an existed flow rule as well. Command examples are shown below. Json profile examples can be found in ./parsegraph/samples. Naming format input: python flow_create.py --add -p "mac()/ipv4(src=1.1.1.1,dst=2.2.2.2)/udp()" -a "redirect-to-queue 3" -i 1 python flow_create.py --del -i 1 -I 0 Json profile format input: python flow_create.py -f "./flow_rule_examples/mac_ipv4.json" -i 1 With this command, flow rule can be added or deleted, and the flow entry can be listed with "show flow entry" command in VPP CLI. Packetforge is based on a parsegraph. The parsegraph can be built by users. A Spec can be found in ./parsegraph as guidance. More details about packetforge are in README file. Type: feature Signed-off-by: Ting Xu <ting.xu@intel.com> Change-Id: Ia9f539741c5dca27ff236f2bcc493c5dd48c0df1
163 lines
3.3 KiB
Python
163 lines
3.3 KiB
Python
# Copyright (c) 2022 Intel and/or its affiliates.
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from InputFormat import InputFormat
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def ByteArrayToString(data):
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if len(data) == 0:
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return ""
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sb = []
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for i in range(len(data) - 1):
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sb.append("%02x" % data[i])
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sb.append("%02x" % data[len(data) - 1])
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return sb
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def ToNum(exp):
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if exp == None:
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return True, None
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exp = exp.strip()
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if exp.startswith("0x"):
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out = int(exp, 16)
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else:
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try:
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out = int(exp)
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except:
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return False, None
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return True, out
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def ToIPv4Address(exp):
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ipv4 = [0] * 4
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exp = exp.strip()
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tokens = exp.split(".")
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if len(tokens) != 4:
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return False, bytes(4)
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for i in range(4):
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u8 = int(tokens[i])
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if u8 == None:
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return False, bytes(4)
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ipv4[i] = u8
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return True, bytes(ipv4)
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def ToIPv6Address(exp):
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ipv6 = [0] * 16
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exp = exp.strip()
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tokens = exp.split(":")
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if len(tokens) != 8:
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return False, bytes(16)
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for i in range(8):
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u16 = int(tokens[i], 16)
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if u16 == None:
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return False, bytes(16)
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ipv6[i * 2] = u16 >> 8
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ipv6[i * 2 + 1] = u16 & 0xFF
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return True, bytes(ipv6)
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def ToMacAddress(exp):
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mac = [0] * 6
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exp = exp.strip()
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tokens = exp.split(":")
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if len(tokens) != 6:
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return False, bytes(6)
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for i in range(6):
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u8 = int(tokens[i], 16)
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if u8 == None:
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return False, bytes(6)
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mac[i] = u8
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return True, bytes(mac)
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def ToByteArray(exp):
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exp = exp.strip()
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tokens = exp.split(",")
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tmp = [] * len(tokens)
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for i in range(len(tokens)):
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_, num = ToNum(tokens[i])
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if num == 0:
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return False, bytes(len(tokens))
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tmp[i] = ToNum(tokens[i])
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return True, bytes(tmp)
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def Verify(format, expression):
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if (
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format == InputFormat.u8
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or format == InputFormat.u16
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or format == InputFormat.u32
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or format == InputFormat.u64
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):
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return ToNum(expression)
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elif format == InputFormat.ipv4:
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return ToIPv4Address(expression)
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elif format == InputFormat.ipv6:
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return ToIPv6Address(expression)
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elif format == InputFormat.mac:
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return ToMacAddress(expression)
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elif format == InputFormat.bytearray:
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return ToByteArray(expression)
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else:
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return False, 0
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def IncreaseValue(expression, size):
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if expression == None:
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return str(size)
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_, num = ToNum(expression)
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return str(num + size)
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def Equal(exp, val):
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if exp == None:
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num_1 = 0
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else:
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_, num_1 = ToNum(exp)
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if not num_1:
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return False
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_, num_2 = ToNum(val)
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if not num_2:
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return False
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return num_1 == num_2
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