Added file transfer example

diff --git a/examples/big_buck_bunny_240p_mpeg4_lq.ts b/examples/big_buck_bunny_240p_mpeg4_lq.ts
old mode 100644 (file)
new mode 100755 (executable)

diff --git a/examples/linux/transfer/file_transfer.py b/examples/linux/transfer/file_transfer.py
new file mode 100755 (executable)
index 0000000..b495aa4
--- /dev/null
+++ b/examples/linux/transfer/file_transfer.py
@@ -0,0 +1,111 @@
+#!/usr/bin/env python
+#
+#    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 <http://www.gnu.org/licenses/>.
+#
+# Author: Lucia Guevgeozian <lucia.guevgeozian_odizzio@inria.fr>
+
+from nepi.execution.ec import ExperimentController
+from nepi.execution.resource import ResourceAction, ResourceState, populate_factory
+
+
+def add_node(ec, host, user):
+    node = ec.register_resource("LinuxNode")
+    ec.set(node, "hostname", host)
+    ec.set(node, "username", user)
+    ec.set(node, "cleanHome", True)
+    ec.set(node, "cleanProcesses", True)
+    return node
+
+def add_app(ec, command, node, sudo=None, video=None, depends=None, forward_x11=None, \
+        env=None):
+    app = ec.register_resource("LinuxApplication")
+    if sudo is not None:
+        ec.set(app, "sudo", sudo)
+    if video is not None:
+        ec.set(app, "sources", video)
+    if depends is not None:
+        ec.set(app, "depends", depends)
+    if forward_x11 is not None:
+       ec.set(app, "forwardX11", forward_x11)
+    if env is not None:
+        ec.set(app, "env", env)
+    ec.set(app, "command", command)
+    ec.register_connection(app, node)
+    return app
+
+populate_factory()
+
+exp_id = "transfer_file"
+
+# Create the EC
+ec = ExperimentController(exp_id)
+
+# PlanetLab choosen nodes for the experiment, change for PlanetLab nodes in your slice or
+# other linux nodes
+server_name = "planetlab2.ionio.gr"
+client_name = "planetlab2.fri.uni-lj.si"
+
+slicename = "inria_sfatest"
+
+# Location of the video in local machine
+video= "../big_buck_bunny_240p_mpeg4_lq.ts"
+
+# Packets needed for running the experiment
+depends_server = "pv nc tcpdump"
+depends_client = "nc"
+
+# Add resource managers for the linux nodes
+server = add_node(ec, server_name, slicename)
+client = add_node(ec, client_name, slicename)
+
+# Add resource managers for the linux applications
+app_server =  add_app(ec, "cat ${SOURCES}/big_buck_bunny_240p_mpeg4_lq.ts | pv -fbt 2> \
+     bw.txt | nc %s 1234" % client_name, server, video=video, depends=depends_server)
+
+# Note: is important to add the -d option in nc command to not attempt to read from the 
+# stdin
+# if not nc in the client side close the socket suddently if runned in background
+app_client =  add_app(ec, "nc -dl 1234 > big_buck_copied_movie.ts", client, \
+    depends=depends_client)
+
+capture = add_app(ec, "tcpdump -ni eth0 -w video_transfer.pcap -s0 port 1234 2>&1", \
+    server, sudo=True)
+
+# Register conditions 1. nodes ; 2. start tcpdump capture ; 3. client listen port 1234 ;
+# 4. server start sending video
+ec.register_condition(app_server, ResourceAction.START, app_client, ResourceState.STARTED) 
+ec.register_condition(app_client, ResourceAction.START, capture, ResourceState.STARTED)
+
+# Deploy
+ec.deploy()
+
+# Wait until the applications are finish to retrive the traces
+ec.wait_finished([app_server, app_client])
+
+bw = ec.trace(app_server, "bw.txt")
+pcap = ec.trace(capture, "video_transfer.pcap")
+
+# Choose a directory to store the traces, example f = open("/home/<user>/bw.txt", "w")
+f = open("examples/linux/transfer/bw.txt", "w")
+f.write(bw)
+f.close()
+f = open("examples/linux/transfer/video_transfer.pcap", "w")
+f.write(pcap)
+f.close()
+
+ec.shutdown()
+

diff --git a/src/nepi/resources/linux/node.py b/src/nepi/resources/linux/node.py
index f5a5429..7ac2d12 100644 (file)
--- a/src/nepi/resources/linux/node.py
+++ b/src/nepi/resources/linux/node.py
@@ -269,7 +269,6 @@ class LinuxNode(ResourceManager):
         if not self.localhost:
             # Build destination as <user>@<server>:<path>
             dst = "%s@%s:%s" % (self.get("username"), self.get("hostname"), dst)
-
         result = self.copy(src, dst)
 
         # clean up temp file