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# Copyright (c) 2022 Intel and/or its affiliates.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from vpp_papi.vpp_papi import VPPApiClient
import sys, getopt
import packetforge
import fnmatch
import os
# Get VPP json API file directory
CLIENT_ID = "Vppclient"
VPP_JSON_DIR = (
os.path.abspath("../..") + "/build-root/install-vpp-native/vpp/share/vpp/api/core"
)
VPP_JSON_DIR_PLUGIN = (
os.path.abspath("../..")
+ "/build-root/install-vpp-native/vpp/share/vpp/api/plugins"
)
API_FILE_SUFFIX = "*.api.json"
def load_json_api_files(suffix=API_FILE_SUFFIX):
jsonfiles = []
json_dir = VPP_JSON_DIR
for root, dirnames, filenames in os.walk(json_dir):
for filename in fnmatch.filter(filenames, suffix):
jsonfiles.append(os.path.join(json_dir, filename))
json_dir = VPP_JSON_DIR_PLUGIN
for root, dirnames, filenames in os.walk(json_dir):
for filename in fnmatch.filter(filenames, suffix):
jsonfiles.append(os.path.join(json_dir, filename))
if not jsonfiles:
raise RuntimeError("Error: no json api files found")
else:
print("load json api file done")
return jsonfiles
def connect_vpp(jsonfiles):
vpp = VPPApiClient(apifiles=jsonfiles)
r = vpp.connect("CLIENT_ID")
print("VPP api opened with code: %s" % r)
return vpp
def Main(argv):
file_flag = False
operation = None
actions = ""
iface = ""
try:
opts, args = getopt.getopt(
argv,
"hf:p:a:i:I:",
[
"help",
"add",
"del",
"show",
"file=",
"pattern=",
"actions=",
"interface=",
"flow-index=",
],
)
except getopt.GetoptError:
print(
"flow_create.py --add|del|show -f <file> -p <pattern> -a <actions> -i <interface> -I <flow-index>"
)
sys.exit()
for opt, arg in opts:
if opt == "-h":
print(
"flow_create.py --add|del|show -f <file> -p <pattern> -a <actions> -i <interface> -I <flow-index>"
)
sys.exit()
elif opt == "--add":
operation = "add"
elif opt == "--del":
operation = "del"
elif opt == "--show":
operation = "show"
elif opt in ("-f", "--file"):
json_file = arg
file_flag = True
elif opt in ("-p", "--pattern") and not file_flag:
pattern = arg
elif opt in ("-a", "--actions"):
actions = arg
elif opt in ("-i", "--interface"):
iface = arg
elif opt in ("-I", "--flow-index"):
flow_index = arg
if operation == None:
print("Error: Please choose the operation: add or del")
sys.exit()
if operation == "show":
if not file_flag:
result = packetforge.Forge(pattern, actions, False, True)
else:
result = packetforge.Forge(json_file, actions, True, True)
return result, None, operation, None, None
# Python API need json definitions to interpret messages
vpp = connect_vpp(load_json_api_files())
# set inteface states
vpp.api.sw_interface_set_flags(sw_if_index=int(iface), flags=1)
if operation == "add":
if not file_flag:
result = packetforge.Forge(pattern, actions, False, False)
else:
result = packetforge.Forge(json_file, actions, True, False)
return result, int(iface), operation, None, vpp
elif operation == "del":
return None, int(iface), operation, int(flow_index), vpp
if __name__ == "__main__":
# Parse the arguments
my_flow, iface, operation, del_flow_index, vpp = Main(sys.argv[1:])
# if operation is show, just show spec and mask, then exit
if operation == "show":
print(my_flow)
sys.exit()
if operation == "add":
# add flow
rv = vpp.api.flow_add_v2(flow=my_flow)
flow_index = rv[3]
print(rv)
# enable added flow
rv = vpp.api.flow_enable(flow_index=flow_index, hw_if_index=iface)
ena_res = rv[2]
# if enable flow fail, delete added flow
if ena_res:
print("Error: enable flow failed, delete flow")
rv = vpp.api.flow_del(flow_index=flow_index)
print(rv)
elif operation == "del":
# disable flow
rv = vpp.api.flow_disable(flow_index=del_flow_index, hw_if_index=iface)
dis_res = rv[2]
if dis_res:
print("Error: disable flow failed")
sys.exit()
print(rv)
# delete flow
rv = vpp.api.flow_del(flow_index=del_flow_index)
print(rv)
# command example:
# 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
# python flow_create.py --show -p "mac()/ipv4(src=1.1.1.1,dst=2.2.2.2)/udp()"
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