#
# 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 .
#
# Author: Alina Quereilhac
from nepi.execution.attribute import Attribute, Flags, Types
from nepi.execution.trace import Trace, TraceAttr
from nepi.execution.resource import clsinit_copy, ResourceState, \
ResourceAction, reschedule_delay
from nepi.resources.linux.application import LinuxApplication
from nepi.resources.linux.ccn.ccnd import LinuxCCND
from nepi.util.timefuncs import tnow
import os
# TODO: Add rest of options for ccndc!!!
# Implement ENTRY DELETE!!
@clsinit_copy
class LinuxFIBEntry(LinuxApplication):
_rtype = "LinuxFIBEntry"
@classmethod
def _register_attributes(cls):
uri = Attribute("uri",
"URI prefix to match and route for this FIB entry",
default = "ccnx:/",
flags = Flags.ExecReadOnly)
protocol = Attribute("protocol",
"Transport protocol used in network connection to peer "
"for this FIB entry. One of 'udp' or 'tcp'.",
type = Types.Enumerate,
default = "udp",
allowed = ["udp", "tcp"],
flags = Flags.ExecReadOnly)
host = Attribute("host",
"Peer host used in network connection for this FIB entry. ",
flags = Flags.ExecReadOnly)
port = Attribute("port",
"Peer port address used in network connection to peer "
"for this FIB entry.",
flags = Flags.ExecReadOnly)
cls._register_attribute(uri)
cls._register_attribute(protocol)
cls._register_attribute(host)
cls._register_attribute(port)
def __init__(self, ec, guid):
super(LinuxFIBEntry, self).__init__(ec, guid)
self._home = "fib-%s" % self.guid
@property
def ccnd(self):
ccnd = self.get_connected(LinuxCCND.rtype())
if ccnd: return ccnd[0]
return None
@property
def node(self):
if self.ccnd: return self.ccnd.node
return None
def deploy(self):
# Wait until associated ccnd is provisioned
if not self.ccnd or self.ccnd.state < ResourceState.READY:
# ccnr needs to wait until ccnd is deployed and running
self.ec.schedule(reschedule_delay, self.deploy)
else:
try:
if not self.get("command"):
self.set("command", self._start_command)
if not self.get("env"):
self.set("env", self._environment)
command = self.get("command")
self.info("Deploying command '%s' " % command)
self.discover()
self.provision()
except:
self.fail()
raise
self.debug("----- READY ---- ")
self._ready_time = tnow()
self._state = ResourceState.READY
def upload_start_command(self):
command = self.get("command")
env = self.get("env")
if command:
# We want to make sure the FIB entries are created
# before the experiment starts.
# Run the command as a bash script in the background,
# in the host ( but wait until the command has
# finished to continue )
env = env and self.replace_paths(env)
command = self.replace_paths(command)
(out, err), proc = self.execute_command(command, env)
if proc.poll():
self._state = ResourceState.FAILED
msg = "Failed to execute command"
self.error(msg, out, err)
raise RuntimeError, msg
def start(self):
if self._state in [ResourceState.READY, ResourceState.STARTED]:
command = self.get("command")
self.info("Starting command '%s'" % command)
self._start_time = tnow()
self._state = ResourceState.STARTED
else:
msg = " Failed to execute command '%s'" % command
self.error(msg, out, err)
self._state = ResourceState.FAILED
raise RuntimeError, msg
def stop(self):
command = self.get('command')
env = self.get('env')
if self.state == ResourceState.STARTED:
self.info("Stopping command '%s'" % command)
command = self._stop_command
(out, err), proc = self.execute_command(command, env)
if proc.poll():
pass
self._stop_time = tnow()
self._state = ResourceState.STOPPED
@property
def state(self):
return self._state
@property
def _start_command(self):
uri = self.get("uri") or ""
protocol = self.get("protocol") or ""
host = self.get("host") or ""
port = self.get("port") or ""
# add ccnx:/example.com/ udp 224.0.0.204 52428
return "ccndc add %(uri)s %(protocol)s %(host)s %(port)s" % ({
"uri" : uri,
"protocol": protocol,
"host": host,
"port": port
})
@property
def _stop_command(self):
uri = self.get("uri") or ""
protocol = self.get("protocol") or ""
host = self.get("host") or ""
port = self.get("port") or ""
# add ccnx:/example.com/ udp 224.0.0.204 52428
return "ccndc del %(uri)s %(protocol)s %(host)s %(port)s" % ({
"uri" : uri,
"protocol": protocol,
"host": host,
"port": port
})
@property
def _environment(self):
return self.ccnd.path
def execute_command(self, command, env):
environ = self.node.format_environment(env, inline = True)
command = environ + command
command = self.replace_paths(command)
return self.node.execute(command)
def valid_connection(self, guid):
# TODO: Validate!
return True