# -*- coding: utf-8 -*-
#
# Copyright (C) 2013 GNS3 Technologies Inc.
#
# 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/>.
"""
Interface for Dynamips virtual ATM switch module ("atmsw").
http://github.com/GNS3/dynamips/blob/master/README.hypervisor#L593
"""
from ..dynamips_error import DynamipsError
import logging
log = logging.getLogger(__name__)
class ATMSwitch(object):
"""
Dynamips ATM switch.
:param hypervisor: Dynamips hypervisor instance
:param name: name for this switch
"""
_allocated_names = []
_instance_count = 1
def __init__(self, hypervisor, name=None):
# create an unique ID
self._id = ATMSwitch._instance_count
ATMSwitch._instance_count += 1
# let's create a unique name if none has been chosen
if not name:
name_id = self._id
while True:
name = "ATM" + str(name_id)
# check if the name has already been allocated to another switch
if name not in self._allocated_names:
break
name_id += 1
self._allocated_names.append(name)
self._hypervisor = hypervisor
self._name = '"' + name + '"' # put name into quotes to protect spaces
self._hypervisor.send("atmsw create {}".format(self._name))
log.info("ATM switch {name} [id={id}] has been created".format(name=self._name,
id=self._id))
self._hypervisor.devices.append(self)
self._nios = {}
self._mapping = {}
@classmethod
def reset(cls):
"""
Resets the instance count and the allocated names list.
"""
cls._instance_count = 1
cls._allocated_names.clear()
@property
def id(self):
"""
Returns the unique ID for this ATM switch.
:returns: id (integer)
"""
return self._id
@property
def name(self):
"""
Returns the current name of this ATM switch.
:returns: ATM switch name
"""
return self._name[1:-1] # remove quotes
@name.setter
def name(self, new_name):
"""
Renames this ATM switch.
:param new_name: New name for this switch
"""
new_name_no_quotes = new_name
new_name = '"' + new_name + '"' # put the new name into quotes to protect spaces
self._hypervisor.send("atmsw rename {name} {new_name}".format(name=self._name,
new_name=new_name))
log.info("ATM switch {name} [id={id}]: renamed to {new_name}".format(name=self._name,
id=self._id,
new_name=new_name))
self._allocated_names.remove(self.name)
self._name = new_name
self._allocated_names.append(new_name_no_quotes)
@property
def hypervisor(self):
"""
Returns the current hypervisor.
:returns: hypervisor instance
"""
return self._hypervisor
def list(self):
"""
Returns all ATM switches instances.
:returns: list of all ATM switches
"""
return self._hypervisor.send("atmsw list")
@property
def nios(self):
"""
Returns all the NIOs member of this ATM switch.
:returns: nio list
"""
return self._nios
@property
def mapping(self):
"""
Returns port mapping
:returns: mapping list
"""
return self._mapping
def delete(self):
"""
Deletes this ATM switch.
"""
self._hypervisor.send("atmsw delete {}".format(self._name))
log.info("ATM switch {name} [id={id}] has been deleted".format(name=self._name,
id=self._id))
self._hypervisor.devices.remove(self)
self._allocated_names.remove(self.name)
def has_port(self, port):
"""
Checks if a port exists on this ATM switch.
:returns: boolean
"""
if port in self._nios:
return True
return False
def add_nio(self, nio, port):
"""
Adds a NIO as new port on ATM switch.
:param nio: NIO instance to add
:param port: port to allocate for the NIO
"""
if port in self._nios:
raise DynamipsError("Port {} isn't free".format(port))
log.info("ATM switch {name} [id={id}]: NIO {nio} bound to port {port}".format(name=self._name,
id=self._id,
nio=nio,
port=port))
self._nios[port] = nio
def remove_nio(self, port):
"""
Removes the specified NIO as member of this ATM switch.
:param port: allocated port
"""
if port not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port))
nio = self._nios[port]
log.info("ATM switch {name} [id={id}]: NIO {nio} removed from port {port}".format(name=self._name,
id=self._id,
nio=nio,
port=port))
del self._nios[port]
return nio
def map_vp(self, port1, vpi1, port2, vpi2):
"""
Creates a new Virtual Path connection.
:param port1: input port
:param vpi1: input vpi
:param port2: output port
:param vpi2: output vpi
"""
if port1 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port1))
if port2 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port2))
nio1 = self._nios[port1]
nio2 = self._nios[port2]
self._hypervisor.send("atmsw create_vpc {name} {input_nio} {input_vpi} {output_nio} {output_vpi}".format(name=self._name,
input_nio=nio1,
input_vpi=vpi1,
output_nio=nio2,
output_vpi=vpi2))
log.info("ATM switch {name} [id={id}]: VPC from port {port1} VPI {vpi1} to port {port2} VPI {vpi2} created".format(name=self._name,
id=self._id,
port1=port1,
vpi1=vpi1,
port2=port2,
vpi2=vpi2))
self._mapping[(port1, vpi1)] = (port2, vpi2)
def unmap_vp(self, port1, vpi1, port2, vpi2):
"""
Deletes a new Virtual Path connection.
:param port1: input port
:param vpi1: input vpi
:param port2: output port
:param vpi2: output vpi
"""
if port1 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port1))
if port2 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port2))
nio1 = self._nios[port1]
nio2 = self._nios[port2]
self._hypervisor.send("atmsw delete_vpc {name} {input_nio} {input_vpi} {output_nio} {output_vpi}".format(name=self._name,
input_nio=nio1,
input_vpi=vpi1,
output_nio=nio2,
output_vpi=vpi2))
log.info("ATM switch {name} [id={id}]: VPC from port {port1} VPI {vpi1} to port {port2} VPI {vpi2} deleted".format(name=self._name,
id=self._id,
port1=port1,
vpi1=vpi1,
port2=port2,
vpi2=vpi2))
del self._mapping[(port1, vpi1)]
def map_pvc(self, port1, vpi1, vci1, port2, vpi2, vci2):
"""
Creates a new Virtual Channel connection (unidirectional).
:param port1: input port
:param vpi1: input vpi
:param vci1: input vci
:param port2: output port
:param vpi2: output vpi
:param vci2: output vci
"""
if port1 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port1))
if port2 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port2))
nio1 = self._nios[port1]
nio2 = self._nios[port2]
self._hypervisor.send("atmsw create_vcc {name} {input_nio} {input_vpi} {input_vci} {output_nio} {output_vpi} {output_vci}".format(name=self._name,
input_nio=nio1,
input_vpi=vpi1,
input_vci=vci1,
output_nio=nio2,
output_vpi=vpi2,
output_vci=vci2))
log.info("ATM switch {name} [id={id}]: VCC from port {port1} VPI {vpi1} VCI {vci1} to port {port2} VPI {vpi2} VCI {vci2} created".format(name=self._name,
id=self._id,
port1=port1,
vpi1=vpi1,
vci1=vci1,
port2=port2,
vpi2=vpi2,
vci2=vci2))
self._mapping[(port1, vpi1, vci1)] = (port2, vpi2, vci2)
def unmap_pvc(self, port1, vpi1, vci1, port2, vpi2, vci2):
"""
Deletes a new Virtual Channel connection (unidirectional).
:param port1: input port
:param vpi1: input vpi
:param vci1: input vci
:param port2: output port
:param vpi2: output vpi
:param vci2: output vci
"""
if port1 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port1))
if port2 not in self._nios:
raise DynamipsError("Port {} is not allocated".format(port2))
nio1 = self._nios[port1]
nio2 = self._nios[port2]
self._hypervisor.send("atmsw delete_vcc {name} {input_nio} {input_vpi} {input_vci} {output_nio} {output_vpi} {output_vci}".format(name=self._name,
input_nio=nio1,
input_vpi=vpi1,
input_vci=vci1,
output_nio=nio2,
output_vpi=vpi2,
output_vci=vci2))
log.info("ATM switch {name} [id={id}]: VCC from port {port1} VPI {vpi1} VCI {vci1} to port {port2} VPI {vpi2} VCI {vci2} deleted".format(name=self._name,
id=self._id,
port1=port1,
vpi1=vpi1,
vci1=vci1,
port2=port2,
vpi2=vpi2,
vci2=vci2))
del self._mapping[(port1, vpi1, vci1)]