+#
+# 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
+