src/emuvim/cli/network.py

   1 """
   2 son-emu network CLI
   3 (c) 2016 by Manuel Peuster <manuel.peuster@upb.de>
   4 """
   5
   6 import argparse
   7 import pprint
   8 from tabulate import tabulate
   9 import zerorpc
  10
  11
  12 pp = pprint.PrettyPrinter(indent=4)
  13
  14 class ZeroRpcClient(object):
  15
  16     def __init__(self):
  17         self.c = zerorpc.Client()
  18         # TODO connect to DCNetwork API
  19         #self.c.connect("tcp://127.0.0.1:4242")  # TODO hard coded for now. we'll change this later
  20         self.c.connect("tcp://127.0.0.1:5151")
  21         self.cmds = {}
  22
  23     def execute_command(self, args):
  24         if getattr(self, args["command"]) is not None:
  25             # call the local method with the same name as the command arg
  26             getattr(self, args["command"])(args)
  27         else:
  28             print "Command not implemented."
  29
  30     def add(self, args):
  31         vnf_src_name = self._parse_vnf_name(args.get("source"))
  32         vnf_dst_name = self._parse_vnf_name(args.get("destination"))
  33
  34         params = self._create_dict(
  35             vnf_src_interface=self._parse_vnf_interface(args.get("source")),
  36             vnf_dst_interface=self._parse_vnf_interface(args.get("destination")),
  37             weight=args.get("weight"),
  38             match=args.get("match"))
  39
  40         # note zerorpc does not support named arguments
  41         r = self.c.network_action_start(
  42             #args.get("datacenter"),
  43             vnf_src_name,
  44             vnf_dst_name,
  45             params)
  46         pp.pprint(r)
  47
  48     def remove(self, args):
  49         vnf_src_name = self._parse_vnf_name(args.get("source"))
  50         vnf_dst_name = self._parse_vnf_name(args.get("destination"))
  51
  52         params = self._create_dict(
  53             vnf_src_interface=self._parse_vnf_interface(args.get("source")),
  54             vnf_dst_interface=self._parse_vnf_interface(args.get("destination")),
  55             weight=args.get("weight"),
  56             match=args.get("match"))
  57
  58         r = self.c.network_action_stop(
  59             #args.get("datacenter"),
  60             vnf_src_name,
  61             vnf_dst_name,
  62             params)
  63         pp.pprint(r)
  64
  65     def _parse_vnf_name(self, vnf_name_str):
  66         vnf_name = vnf_name_str.split(':')[0]
  67         return vnf_name
  68
  69     def _parse_vnf_interface(self, vnf_name_str):
  70         try:
  71             vnf_interface = vnf_name_str.split(':')[1]
  72         except:
  73             vnf_interface = None
  74
  75         return vnf_interface
  76
  77     def _create_dict(self, **kwargs):
  78         return kwargs
  79
  80 parser = argparse.ArgumentParser(description='son-emu network')
  81 parser.add_argument(
  82     "command",
  83     help="Action to be executed: add|remove")
  84 parser.add_argument(
  85     "--datacenter", "-d", dest="datacenter",
  86     help="Data center to in which the network action should be initiated")
  87 parser.add_argument(
  88     "--source", "-src", dest="source",
  89     help="vnf name of the source of the chain")
  90 parser.add_argument(
  91     "--destination", "-dst", dest="destination",
  92     help="vnf name of the destination of the chain")
  93 parser.add_argument(
  94     "--weight", "-w", dest="weight",
  95     help="weight metric to calculate the path")
  96 parser.add_argument(
  97     "--match", "-m", dest="match",
  98     help="string holding extra matches for the flow entries")
  99
 100 def main(argv):
 101     args = vars(parser.parse_args(argv))
 102     c = ZeroRpcClient()
 103     c.execute_command(args)