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#
# Copyright 2013 Red Hat, Inc.
# Cole Robinson <crobinso@redhat.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.
"""
Classes for building and installing libvirt <network> XML
"""
import logging
import libvirt
from virtinst import util
from virtinst.xmlbuilder import XMLBuilder, XMLChildProperty, XMLProperty
class _NetworkDHCPRange(XMLBuilder):
_XML_ROOT_NAME = "range"
start = XMLProperty("./@start")
end = XMLProperty("./@end")
class _NetworkDHCPHost(XMLBuilder):
_XML_ROOT_NAME = "host"
macaddr = XMLProperty("./@mac")
name = XMLProperty("./@name")
ip = XMLProperty("./@ip")
class _NetworkIP(XMLBuilder):
_XML_ROOT_NAME = "ip"
family = XMLProperty("./@family")
address = XMLProperty("./@address")
prefix = XMLProperty("./@prefix", is_int=True)
netmask = XMLProperty("./@netmask")
tftp = XMLProperty("./tftp/@root")
bootp_file = XMLProperty("./dhcp/bootp/@file")
bootp_server = XMLProperty("./dhcp/bootp/@server")
ranges = XMLChildProperty(_NetworkDHCPRange, relative_xpath="./dhcp")
hosts = XMLChildProperty(_NetworkDHCPHost, relative_xpath="./dhcp")
def add_range(self):
r = _NetworkDHCPRange(self.conn)
self._add_child(r)
return r
class _NetworkRoute(XMLBuilder):
_XML_ROOT_NAME = "route"
family = XMLProperty("./@family")
address = XMLProperty("./@address")
prefix = XMLProperty("./@prefix", is_int=True)
gateway = XMLProperty("./@gateway")
netmask = XMLProperty("./@netmask")
class _NetworkForward(XMLBuilder):
_XML_ROOT_NAME = "forward"
mode = XMLProperty("./@mode")
dev = XMLProperty("./@dev")
def pretty_desc(self):
return Network.pretty_forward_desc(self.mode, self.dev)
class Network(XMLBuilder):
"""
Top level class for <network> object XML
"""
@staticmethod
def pretty_forward_desc(mode, dev):
if mode or dev:
if not mode or mode == "nat":
if dev:
desc = _("NAT to %s") % dev
else:
desc = _("NAT")
elif mode == "route":
if dev:
desc = _("Route to %s") % dev
else:
desc = _("Routed network")
else:
if dev:
desc = "%s to %s" % (mode, dev)
else:
desc = "%s network" % mode.capitalize()
else:
desc = _("Isolated network, internal and host routing only")
return desc
def __init__(self, *args, **kwargs):
XMLBuilder.__init__(self, *args, **kwargs)
self._random_uuid = None
###################
# Helper routines #
###################
def can_pxe(self):
forward = self.forward.mode
if forward and forward != "nat":
return True
for ip in self.ips:
if ip.bootp_file:
return True
return False
######################
# Validation helpers #
######################
def _validate_name(self, name):
util.validate_name(_("Network"), name)
try:
self.conn.networkLookupByName(name)
except libvirt.libvirtError:
return
raise ValueError(_("Name '%s' already in use by another network." %
name))
def _get_default_uuid(self):
if self._random_uuid is None:
self._random_uuid = util.generate_uuid(self.conn)
return self._random_uuid
##################
# XML properties #
##################
_XML_ROOT_NAME = "network"
_XML_PROP_ORDER = ["ipv6", "name", "uuid", "forward",
"bridge", "stp", "delay", "domain_name",
"macaddr", "ips", "routes"]
ipv6 = XMLProperty("./@ipv6", is_yesno=True)
name = XMLProperty("./name", validate_cb=_validate_name)
uuid = XMLProperty("./uuid",
validate_cb=lambda s, v: util.validate_uuid(v),
default_cb=_get_default_uuid)
# Not entirely correct, there can be multiple routes
forward = XMLChildProperty(_NetworkForward, is_single=True)
domain_name = XMLProperty("./domain/@name")
bridge = XMLProperty("./bridge/@name")
stp = XMLProperty("./bridge/@stp", is_onoff=True)
delay = XMLProperty("./bridge/@delay", is_int=True)
macaddr = XMLProperty("./mac/@address")
ips = XMLChildProperty(_NetworkIP)
routes = XMLChildProperty(_NetworkRoute)
def add_ip(self):
ip = _NetworkIP(self.conn)
self._add_child(ip)
return ip
def add_route(self):
route = _NetworkRoute(self.conn)
self._add_child(route)
return route
##################
# build routines #
##################
def install(self, start=True, autostart=True):
xml = self.get_xml_config()
logging.debug("Creating virtual network '%s' with xml:\n%s",
self.name, xml)
net = self.conn.networkDefineXML(xml)
try:
if start:
net.create()
if autostart:
net.setAutostart(autostart)
except:
net.undefine()
raise
return net
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