#
# 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 version 2 as
# published by the Free Software Foundation;
#
# 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 <http://www.gnu.org/licenses/>.
#
# Author: Alina Quereilhac <alina.quereilhac@inria.fr>
import base64
import cPickle
import errno
import os
import socket
import time
import weakref
from optparse import OptionParser, SUPPRESS_HELP
from nepi.resources.netns.netnsclient import NetNSClient
from nepi.resources.netns.netnsserver import NetNSWrapperMessage
[docs]class LinuxNetNSClient(NetNSClient):
def __init__(self, emulation):
super(LinuxNetNSClient, self).__init__()
self._emulation = weakref.ref(emulation)
self._socat_proc = None
@property
[docs] def emulation(self):
return self._emulation()
[docs] 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.emulation.node.get("hostname") in ['localhost', '127.0.0.1']:
sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
sock.connect(self.emulation.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.emulation.remote_socket,
}
(reply, err), proc = self.emulation.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.emulation.remote_socket, reply, err)
self.emulation.error(msg, reply, err)
raise RuntimeError(msg)
reply = cPickle.loads(base64.b64decode(reply))
return reply
[docs] def create(self, *args, **kwargs):
return self.send_msg(NetNSWrapperMessage.CREATE, *args, **kwargs)
[docs] def invoke(self, *args, **kwargs):
return self.send_msg(NetNSWrapperMessage.INVOKE, *args, **kwargs)
[docs] def set(self, *args, **kwargs):
return self.send_msg(NetNSWrapperMessage.SET, *args, **kwargs)
[docs] def get(self, *args, **kwargs):
return self.send_msg(NetNSWrapperMessage.GET, *args, **kwargs)
[docs] def flush(self, *args, **kwargs):
return self.send_msg(NetNSWrapperMessage.FLUSH, *args, **kwargs)
[docs] def shutdown(self, *args, **kwargs):
try:
return self.send_msg(NetNSWrapperMessage.SHUTDOWN, *args, **kwargs)
except:
pass
return None