src/emuvim/api/rest/network.py

   1 """
   2 Copyright (c) 2015 SONATA-NFV and Paderborn University
   3 ALL RIGHTS RESERVED.
   4
   5 Licensed under the Apache License, Version 2.0 (the "License");
   6 you may not use this file except in compliance with the License.
   7 You may obtain a copy of the License at
   8
   9     http://www.apache.org/licenses/LICENSE-2.0
  10
  11 Unless required by applicable law or agreed to in writing, software
  12 distributed under the License is distributed on an "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 See the License for the specific language governing permissions and
  15 limitations under the License.
  16
  17 Neither the name of the SONATA-NFV [, ANY ADDITIONAL AFFILIATION]
  18 nor the names of its contributors may be used to endorse or promote
  19 products derived from this software without specific prior written
  20 permission.
  21
  22 This work has been performed in the framework of the SONATA project,
  23 funded by the European Commission under Grant number 671517 through
  24 the Horizon 2020 and 5G-PPP programmes. The authors would like to
  25 acknowledge the contributions of their colleagues of the SONATA
  26 partner consortium (www.sonata-nfv.eu).
  27 """
  28
  29 """
  30 Distributed Cloud Emulator (dcemulator)
  31 Networking and monitoring functions
  32 (c) 2015 by Steven Van Rossem <steven.vanrossem@intec.ugent.be>
  33 """
  34
  35 import logging
  36 from flask_restful import Resource
  37 from flask import request
  38 import json
  39
  40 logging.basicConfig(level=logging.INFO)
  41 CORS_HEADER = {'Access-Control-Allow-Origin': '*'}
  42
  43 # the global net is set from the topology file, and connected via connectDCNetwork function in rest_api_endpoint.py
  44 net = None
  45
  46
  47 class NetworkAction(Resource):
  48     """
  49     Add or remove chains between VNFs. These chain links are implemented as flow entries in the networks' SDN switches.
  50     :param vnf_src_name: VNF name of the source of the link
  51     :param vnf_dst_name: VNF name of the destination of the link
  52     :param vnf_src_interface: VNF interface name of the source of the link
  53     :param vnf_dst_interface: VNF interface name of the destination of the link
  54     :param weight: weight of the link (can be useful for routing calculations)
  55     :param match: OpenFlow match format of the flow entry
  56     :param bidirectional: boolean value if the link needs to be implemented from src to dst and back
  57     :param cookie: cookie value, identifier of the flow entry to be installed.
  58     :param priority: integer indicating the priority of the flow entry
  59     :param skip_vlan_tag: boolean to indicate whether a new vlan tag should be created for this chain
  60     :param monitor: boolean to indicate whether a new vlan tag should be created for this chain
  61     :param monitor_placement: 'tx'=place the monitoring flowrule at the beginning of the chain, 'rx'=place at the end of the chain
  62     :return: message string indicating if the chain action is succesful or not
  63     """
  64
  65     global net
  66
  67     def put(self, vnf_src_name, vnf_dst_name):
  68         logging.debug("REST CALL: network chain add")
  69         command = 'add-flow'
  70         return self._NetworkAction(vnf_src_name, vnf_dst_name, command=command)
  71
  72     def delete(self, vnf_src_name, vnf_dst_name):
  73         logging.debug("REST CALL: network chain remove")
  74         command = 'del-flows'
  75         return self._NetworkAction(vnf_src_name, vnf_dst_name, command=command)
  76
  77     def _NetworkAction(self, vnf_src_name, vnf_dst_name, command=None):
  78         # call DCNetwork method, not really datacenter specific API for now...
  79         # no check if vnfs are really connected to this datacenter...
  80         try:
  81             # check if json data is a dict
  82             data = request.json
  83             if data is None:
  84                 data = {}
  85             elif type(data) is not dict:
  86                 data = json.loads(request.json)
  87
  88             vnf_src_interface = data.get("vnf_src_interface")
  89             vnf_dst_interface = data.get("vnf_dst_interface")
  90             weight = data.get("weight")
  91             match = data.get("match")
  92             bidirectional = data.get("bidirectional")
  93             cookie = data.get("cookie")
  94             priority = data.get("priority")
  95             skip_vlan_tag = data.get("skip_vlan_tag")
  96             monitor = data.get("monitor")
  97             monitor_placement = data.get("monitor_placement")
  98
  99             c = net.setChain(
 100                 vnf_src_name, vnf_dst_name,
 101                 vnf_src_interface=vnf_src_interface,
 102                 vnf_dst_interface=vnf_dst_interface,
 103                 cmd=command,
 104                 weight=weight,
 105                 match=match,
 106                 bidirectional=bidirectional,
 107                 cookie=cookie,
 108                 priority=priority,
 109                 skip_vlan_tag=skip_vlan_tag,
 110                 monitor=monitor,
 111                 monitor_placement=monitor_placement)
 112             # return setChain response
 113             return str(c), 200, CORS_HEADER
 114         except Exception as ex:
 115             logging.exception("API error.")
 116             return ex.message, 500, CORS_HEADER