#
# NEPI, a framework to manage network experiments
# Copyright (C) 2014 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 cPickle
import errno
import os
import socket
import time
import weakref
from optparse import OptionParser, SUPPRESS_HELP
from nepi.resources.ns3.ns3client import NS3Client
from nepi.resources.ns3.ns3server import NS3WrapperMessage
class LinuxNS3Client(NS3Client):
def __init__(self, simulation):
super(LinuxNS3Client, self).__init__()
self._simulation = weakref.ref(simulation)
self._socat_proc = None
@property
def simulation(self):
return self._simulation()
def send_msg(self, msg_type, *args, **kwargs):
msg = [msg_type, args, kwargs]
def encode(item):
item = cPickle.dumps(item)
return base64.b64encode(item)
encoded = "|".join(map(encode, msg))
if self.simulation.node.get("hostname") in ['localhost', '127.0.0.1']:
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.connect(self.simulation.remote_socket)
sock.send("%s\n" % encoded)
reply = sock.recv(1024)
sock.close()
else:
command = ( "python -c 'import socket;"
"sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM);"
"sock.connect(\"%(socket_addr)s\");"
"msg = \"%(encoded_message)s\\n\";"
"sock.send(msg);"
"reply = sock.recv(1024);"
"sock.close();"
"print reply'") % {
"encoded_message": encoded,
"socket_addr": self.simulation.remote_socket,
}
(reply, err), proc = self.simulation.node.execute(command,
with_lock = True)
if (err and proc.poll()) or reply.strip() == "":
msg = (" Couldn't connect to remote socket %s - REPLY: %s "
"- ERROR: %s ") % (
self.simulation.remote_socket, reply, err)
self.simulation.error(msg, reply, err)
raise RuntimeError(msg)
reply = cPickle.loads(base64.b64decode(reply))
return reply
def create(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.CREATE, *args, **kwargs)
def factory(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.FACTORY, *args, **kwargs)
def invoke(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.INVOKE, *args, **kwargs)
def set(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.SET, *args, **kwargs)
def get(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.GET, *args, **kwargs)
def flush(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.FLUSH, *args, **kwargs)
def start(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.START, *args, **kwargs)
def stop(self, *args, **kwargs):
return self.send_msg(NS3WrapperMessage.STOP, *args, **kwargs)
def shutdown(self, *args, **kwargs):
try:
return self.send_msg(NS3WrapperMessage.SHUTDOWN, *args, **kwargs)
except:
pass
return None