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#!/usr/bin/python
#
# Copyright 2008, Stone-IT
# Jasper Capel <capel@stone-it.com>
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301 USA
import func_module
import os
class Vlan(func_module.FuncModule):
version = "0.0.1"
api_version = "0.0.1"
description = "Func module for VLAN management"
# A list of VLAN IDs that should be ignored.
# You can use this if you have VLAN IDs which are reserved for internal
# use, which should never be touched by func.
ignorevlans = [ ]
vconfig = "/sbin/vconfig"
ip = "/sbin/ip"
ifup = "/sbin/ifup"
ifdown = "/sbin/ifdown"
def list(self):
# Returns a dictionary, elements look like this:
# key: interface, value: [id1, id2, id3]
retlist = {}
f = open("/proc/net/vlan/config")
# Read the config, throw the header lines away
# Lines look like:
# bond1.1003 | 1003 | bond1
lines = f.readlines()[2:]
for line in lines:
elements = line.split("|")
vlanid = int(elements[1].strip())
interface = elements[2].strip()
if interface not in retlist:
# New list in dictionary
retlist[interface] = [ vlanid ]
else:
# Append to existing list in dictionary
retlist[interface].append(vlanid)
return retlist
def add(self, interface, vlanid):
vlanid = int(vlanid)
# Adds a vlan with vlanid on interface
if vlanid not in self.ignorevlans:
exitcode = os.spawnv(os.P_WAIT, self.vconfig, [ self.vconfig, "add", interface, str(vlanid)] )
else:
exitcode = -1
return exitcode
def add_permanent(self, interface, vlanid, ipaddr=None, netmask=None, gateway=None):
# Permanently adds a VLAN by writing to an ifcfg-file
vlanid = int(vlanid)
device = "%s.%s" % (interface, vlanid)
if vlanid not in self.ignorevlans:
filename = "/etc/sysconfig/network-scripts/ifcfg-%s" % device
fp = open(filename, "w")
filelines = [ "DEVICE=%s\n" % device, "VLAN=yes\n", "ONBOOT=yes\n" ]
if ipaddr != None:
filelines.append("BOOTPROTO=static\n")
filelines.append("IPADDR=%s\n" % ipaddr)
else:
filelines.append("BOOTPROTO=none\n")
if netmask != None:
filelines.append("NETMASK=%s\n" % netmask)
if gateway != None:
filelines.append("GATEWAY=%s\n" % gateway)
fp.writelines(filelines)
fp.close()
exitcode = os.spawnv(os.P_WAIT, self.ifup, [ self.ifup, device ])
else:
exitcode = -1
return exitcode
def delete(self, interface, vlanid):
# Deletes a vlan with vlanid from interface
vintfname = interface + "." + str(vlanid)
if int(vlanid) not in self.ignorevlans:
exitcode = os.spawnv(os.P_WAIT, self.vconfig, [ self.vconfig, "rem", vintfname] )
else:
exitcode = -1
return exitcode
def delete_permanent(self, interface, vlanid):
if vlanid not in self.ignorevlans:
device = "%s.%s" % (interface, vlanid)
filename = "/etc/sysconfig/network-scripts/ifcfg-%s" % device
self.down(interface, vlanid)
self.delete(interface, vlanid)
if os.path.exists(filename):
os.remove(filename)
exitcode = 0
else:
exitcode = -1
return exitcode
def up(self, interface, vlanid):
# Marks a vlan interface as up
vintfname = interface + "." + str(vlanid)
if int(vlanid) not in self.ignorevlans:
exitcode = os.spawnv(os.P_WAIT, self.ip, [ self.ip, "link", "set", vintfname, "up" ])
else:
exitcode = -1
return exitcode
def down(self, interface, vlanid):
# Marks a vlan interface as down
vintfname = interface + "." + str(vlanid)
if int(vlanid) not in self.ignorevlans:
exitcode = os.spawnv(os.P_WAIT, self.ip, [ self.ip, "link", "set", vintfname, "down" ])
else:
exitcode = -1
return exitcode
def makeitso(self, configuration):
# Applies the supplied configuration to the system.
# Configuration is a dictionary, elements should look like this:
# key: interface, value: [id1, id2, id3]
currentconfig = self.list()
# First, remove all VLANs present in current configuration, that are
# not present in new configuration.
for interface, vlans in currentconfig.iteritems():
if interface not in configuration:
# Remove all the vlans from this interface
for vlan in vlans:
self.delete(interface, vlan)
else:
for vlan in vlans:
if vlan not in configuration[interface]:
# VLAN not in new configuration, remove it.
self.delete(interface, vlan)
# Second, add all VLANs present in new configuration, that are not
# present in current configuration
for interface, vlans in configuration.iteritems():
if interface not in currentconfig:
# Add all VLANs for this interface
for vlan in vlans:
self.add(interface, vlan)
else:
for vlan in vlans:
if vlan not in currentconfig[interface]:
# VLAN not in current configuration, add it.
self.add(interface, vlan)
# Todo: Compare the current configuration to the supplied configuration
return self.list()
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