#
# NEPI, a framework to manage network experiments
# Copyright (C) 2013 INRIA
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
#
# Author: Alina Quereilhac
import base64
import socket
import vsys
from optparse import OptionParser
STOP_MSG = "STOP"
def get_options():
usage = ("usage: %prog -u -N -t "
"-D -S ")
parser = OptionParser(usage = usage)
parser.add_option("-u", "--slicename", dest="slicename",
help = "The name of the PlanetLab slice ",
type="str")
parser.add_option("-N", "--vif-name", dest="vif_name",
help = "The name of the virtual interface, or a "
"unique numeric identifier to name the interface "
"if GRE mode is used.",
type="str")
parser.add_option("-t", "--vif-type", dest="vif_type",
help = "Virtual interface type. Either IFF_TAP or IFF_TUN. "
"Defaults to IFF_TAP. ", type="str")
parser.add_option("-D", "--delete", dest="delete",
action="store_true",
default = False,
help="Removes virtual interface if GRE mode was used")
parser.add_option("-S", "--socket-name", dest="socket_name",
help = "Name for the unix socket used to interact with this process",
type="str")
(options, args) = parser.parse_args()
vif_type = vsys.IFF_TAP
if options.vif_type and options.vif_type == "IFF_TUN":
vif_type = vsys.IFF_TUN
return (options.socket_name, options.vif_name, options.slicename,
vif_type, options.delete)
if __name__ == '__main__':
(socket_name, vif_name, slicename, vif_type, delete) = get_options()
# If a socket name is sent, send the STOP message and wait for a reply
if socket_name:
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.connect(socket_name)
encoded = base64.b64encode(STOP_MSG)
sock.send("%s\n" % encoded)
reply = sock.recv(1024)
reply = base64.b64decode(reply)
print reply
# If a slicename is provided, use it to remove a GRE device
elif slicename:
import pwd
import getpass
sliceid = pwd.getpwnam(slicename).pw_uid
if vif_type == vsys.IFF_TAP:
vif_prefix = "tap"
else:
vif_prefix = "tun"
# if_name should be a unique numeric vif id
vif_name = "%s%s-%s" % (vif_prefix, sliceid, vif_name)
vsys.vif_down(vif_name, delete = True)
# Else, use the vsys interface to set the virtual interface down
else:
vsys.vif_down(vif_name)