#
# 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
# Lucia Guevgeozian Odizzio
from lxml import etree
#import collections
import sys
class SFAResourcesParser(object):
# Maybe this init method is not necessary, it was aim to check that the
# aggregate was supported by nepi
def __init__(self, aggr_pattern):
if not isinstance(aggr_pattern, list):
self._aggr_pattern = [aggr_pattern]
else:
self._aggr_pattern = aggr_pattern
def resources_from_xml(self, xml, sliver = False, resources = False):
rdata = dict()
ldata = dict()
stags = dict()
RSpec = etree.fromstring(xml)
RSpec_attr = dict(RSpec.attrib)
network = RSpec.findall('.//network')
for net in network:
aggr = net.get('name')
if aggr == 'ple' and resources:
node_tree = net.iterfind('node')
for node in list(node_tree):
if isinstance(node.tag, basestring):
data_ple = dict(node.attrib)
data_ple['aggregate'] = aggr
data_ple['resource_type'] = 'node'
data_ple = self._get_node_info(node, data_ple)
hostname = node.find('hostname')
rdata[hostname.text] = data_ple
if sliver:
sliver_defaults = net.find('sliver_defaults')
if len(sliver_defaults):
stags = self._get_sliver_tags(sliver_defaults, stags)
elif aggr == 'omf' and resources:
node_tree = net.iterfind('node')
for node in node_tree:
if isinstance(node.tag, basestring):
data_omf = dict(node.attrib)
data_omf['aggregate'] = aggr
data_omf['resource_type'] = 'node'
data_omf = self._get_node_info(node, data_omf)
hostname = node.find('hostname')
rdata[hostname.text] = data_omf
spectrum = net.find('spectrum')
for channel in list(spectrum):
if isinstance(channel.tag, basestring):
data_omf = dict(channel.attrib)
data_omf['aggregate'] = aggr
data_omf['resource_type'] = 'channel'
channelnum = data_omf['channel_num']
rdata[channelnum] = data_omf
leases = net.iterfind('lease')
for lease in list(leases):
if isinstance(lease.tag, basestring):
(st, duration) = lease.attrib['start_time'], lease.attrib['duration']
data_lease = dict(lease.attrib)
data_lease['aggregate'] = aggr
data_lease['resource_type'] = 'lease'
data_lease = self._get_leases_info(lease, data_lease)
ldata[(st, duration)] = data_lease
elif aggr == 'omf' and not resources:
leases = net.iterfind('lease')
for lease in list(leases):
if isinstance(lease.tag, basestring):
(st, duration) = lease.attrib['start_time'], lease.attrib['duration']
data_lease = dict(lease.attrib)
data_lease['aggregate'] = aggr
data_lease['resource_type'] = 'lease'
data_lease = self._get_leases_info(lease, data_lease)
ldata[(st, duration)] = data_lease
else:
pass
if sliver:
return rdata, ldata, stags
elif resources:
return rdata, ldata
elif not resources:
return ldata
def _get_node_info(self, node_tag, data_dict):
for n in list(node_tag):
if isinstance(n.tag, basestring):
if n.attrib:
data_dict[n.tag] = dict(n.attrib)
else:
data_dict[n.tag] = n.text
return data_dict
def _get_leases_info(self, lease_tag, data_dict):
nodes = list()
channels = list()
for l in list(lease_tag):
if l.tag == 'node':
node = l.attrib['component_id'].split('+').pop()
nodes.append(node)
if l.tag == 'channel':
#TODO: find out key when channel reservation
#channels.append(l.attrib['averiguar']) channel_num
pass
data_dict['nodes'] = nodes
data_dict['channels'] = channels
return data_dict
def _get_sliver_tags(self, sliverdefaults_tag, sliver_tag_dict):
vsys = list()
for info in list(sliverdefaults_tag):
if info.tag == 'vsys_vnet':
sliver_tag_dict['vsys_vnet'] = info.text
elif info.tag == 'vsys':
vsys.append(info.text)
sliver_tag_dict['vsys'] = vsys
return sliver_tag_dict
def create_reservation_xml(self, xml, slice_hrn, new_resource, start_time, duration, aggregate):
aggrs = []
RSpec = etree.fromstring(xml)
network = RSpec.findall('.//network')
for net in network:
aggr = net.get('name')
aggrs.append(aggr)
if aggr == aggregate:
new_xml = self._create_tags(RSpec, net, slice_hrn, new_resource, start_time, duration)
if aggregate not in aggrs:
new_net = etree.SubElement(RSpec, 'network', name = aggregate)
new_xml = self._create_tags(RSpec, new_net, slice_hrn, new_resource, start_time, duration)
return new_xml
def _create_tags(self, RSpec, net, slice_hrn, new_resource, start_time, duration):
resource = new_resource.keys()[0]
res_type = new_resource[resource]['resource_type']
if res_type == 'node':
node = etree.SubElement(net, res_type, \
component_manager_id = new_resource[resource]['component_manager_id'],\
component_id = new_resource[resource]['component_id'],\
component_name = new_resource[resource]['component_name'], \
site_id = new_resource[resource]['site_id'])
sliver_tag = etree.SubElement(node, 'sliver')
elif res_type == 'channel':
spectrum = etree.SubElement(net, spectrum)
channel = etree.SubElement(spectrum, channel,\
channel_num = new_resource[resource]['channel_num'],\
frequency = new_resource[resource]['frequency'],\
standard = new_resource[resource]['standard'])
if start_time is not None and duration is not None:
slice_id = "urn:publicid:IDN+" + slice_hrn.split('.')[0] + ':' + slice_hrn.split('.')[1]\
+ '+slice+' + slice_hrn.split('.')[2]
lease = etree.SubElement(net, 'lease', slice_id = slice_id,\
start_time = str(start_time), duration = str(duration))
if res_type == 'node':
res = etree.SubElement(lease, res_type,\
component_id = new_resource[resource]['component_id'])
elif res_type == 'channel':
res = etree.SubElement(lease, res_type,\
channel_num = new_resource[resource]['channel_num'])
new_xml = etree.tostring(RSpec, xml_declaration=True)
return new_xml
def verify_reservation_xml(self, xml, slice_hrn, new_resource, start_time, duration, aggregate):
slice_id = "urn:publicid:IDN+" + slice_hrn.split('.')[0] + ':' + slice_hrn.split('.')[1]\
+ '+slice+' + slice_hrn.split('.')[2]
rdata, ldata, stags = self.resources_from_xml(xml, sliver = True, resources = True)
res_name = new_resource.keys()[0]
if res_name in rdata.keys():
if start_time and duration:
if ldata[(start_time, duration)]:
nodes = ldata[(start_time, duration)]['nodes']
sliceid = ldata[(start_time, duration)]['slice_id']
if res_name in nodes and sliceid == slice_id:
return True
else: return False
else: return False
else: return True
else: return False
def release_reservation_xml(self, xml, slice_hrn, resource, start_time, duration, aggregate):
RSpec = etree.fromstring(xml)
network = RSpec.findall('.//network')
for net in network:
aggr = net.get('name')
if aggr == aggregate:
new_xml = self._delete_tag(RSpec, net, slice_hrn, resource, start_time, duration)
return new_xml
def _delete_tag(self, RSpec, net, slice_hrn, resource, start_time, duration):
resource_name = resource.keys()[0]
res_type = resource[resource_name]['resource_type']
if res_type == 'node':
node_tree = net.iterfind('node')
for node in list(node_tree):
if isinstance(node.tag, basestring):
data_node = dict(node.attrib)
if data_node['component_name'] == resource_name:
net.remove(node)
elif res_type == 'channel':
spectrum = net.find('spectrum')
for channel in list(spectrum):
if isinstance(channel.tag, basestring):
data_channel = dict(channel.attrib)
if data_channel['channel_num'] == resource_name:
spectrum.remove(channel)
if start_time is not None and duration is not None:
slice_id = "urn:publicid:IDN+" + slice_hrn.split('.')[0] + ':' + slice_hrn.split('.')[1]\
+ '+slice+' + slice_hrn.split('.')[2]
leases = net.iterfind('lease')
for lease in list(leases):
if isinstance(lease.tag, basestring):
(st, duration) = lease.attrib['start_time'], lease.attrib['duration']
sliceid = lease.attrib['slice_id']
if st == str(start_time) and duration == str(duration) and sliceid == slice_id:
for l in list(lease):
if l.tag == 'node' and res_type == 'node':
if l.attrib['component_id'].split('+').pop() == resource_name:
lease.remove(l)
elif l.tag == 'channel' and res_type == 'channel':
if l.attrib['channel_num'] == resource_name:
lease.remove(l)
new_xml = etree.tostring(RSpec, xml_declaration=True)
return new_xml