rename src/nepi/ into just nepi/

[nepi.git] / nepi / resources / linux / netns / netnsclient.py

diff --git a/nepi/resources/linux/netns/netnsclient.py b/nepi/resources/linux/netns/netnsclient.py
new file mode 100644 (file)
index 0000000..1ad5405
--- /dev/null
+++ b/nepi/resources/linux/netns/netnsclient.py
@@ -0,0 +1,107 @@
+#
+#    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 pickle
+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
+
+class LinuxNetNSClient(NetNSClient):
+    def __init__(self, emulation):
+        super(LinuxNetNSClient, self).__init__()
+        self._emulation = weakref.ref(emulation)
+
+        self._socat_proc = None
+
+    @property
+    def emulation(self):
+        return self._emulation()
+
+    def send_msg(self, msg_type, *args, **kwargs):
+        msg = [msg_type, args, kwargs]
+
+        def encode(item):
+            item = pickle.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 = pickle.loads(base64.b64decode(reply))
+
+        return reply
+
+    def create(self, *args, **kwargs):
+        return self.send_msg(NetNSWrapperMessage.CREATE, *args, **kwargs)
+
+    def invoke(self, *args, **kwargs):
+        return self.send_msg(NetNSWrapperMessage.INVOKE, *args, **kwargs)
+
+    def set(self, *args, **kwargs):
+        return self.send_msg(NetNSWrapperMessage.SET, *args, **kwargs)
+
+    def get(self, *args, **kwargs):
+        return self.send_msg(NetNSWrapperMessage.GET, *args, **kwargs)
+
+    def flush(self, *args, **kwargs):
+        return self.send_msg(NetNSWrapperMessage.FLUSH, *args, **kwargs)
+
+    def shutdown(self, *args, **kwargs):
+        try:
+            return self.send_msg(NetNSWrapperMessage.SHUTDOWN, *args, **kwargs)
+        except:
+            pass
+
+        return None
+