+# vim: set encoding=utf-8 et sw=4 sts=4 :
+
+from subprocess import Popen, PIPE
+from os import path
+import logging ; log = logging.getLogger('pymin.services.ip')
+
+from pymin.seqtools import Sequence
+from pymin.dispatcher import handler, HandlerError, Handler
+from pymin.service.util import Restorable, ConfigWriter, InitdHandler, \
+ TransactionalHandler, SubHandler, call, \
+ get_network_devices, ListComposedSubHandler, \
+ DictComposedSubHandler, ListSubHandler, \
+ Device, Address, ExecutionError
+
+__all__ = ('IpHandler', 'get_service')
+
+
+def get_service(config):
+ return IpHandler(config.ip.pickle_dir, config.ip.config_dir)
+
+
+class Hop(Sequence):
+
+ def __init__(self, gateway, device):
+ self.gateway = gateway
+ self.device = device
+
+ def as_tuple(self):
+ return (self.gateway, self.device)
+
+ def __cmp__(self, other):
+ if self.gateway == other.gateway \
+ and self.device == other.device:
+ return 0
+ return cmp(id(self), id(other))
+
+class HopHandler(ListSubHandler):
+ handler_help = u"Manage IP hops"
+ _cont_subhandler_attr = 'hops'
+ _cont_subhandler_class = Hop
+
+ @handler('Add a hop: add <device> <gateway>')
+ def add(self, dev, gw):
+ if not dev in self.parent.devices:
+ raise DeviceNotFoundError(device)
+ return ListSubHandler.add(self, dev, gw)
+
+
+class Route(Sequence):
+ def __init__(self, net_addr, prefix, gateway):
+ self.net_addr = net_addr
+ self.prefix = prefix
+ self.gateway = gateway
+
+ def update(self, net_addr=None, prefix=None, gateway=None):
+ if net_addr is not None: self.net_addr = net_addr
+ if prefix is not None: self.prefix = prefix
+ if gateway is not None: self.gateway = gateway
+
+ def as_tuple(self):
+ return(self.net_addr, self.prefix, self.gateway)
+
+ def __cmp__(self, other):
+ if self.net_addr == other.net_addr \
+ and self.prefix == other.prefix \
+ and self.gateway == other.gateway:
+ return 0
+ return cmp(id(self), id(other))
+
+class RouteHandler(ListComposedSubHandler):
+ handler_help = u"Manage IP routes"
+ _comp_subhandler_cont = 'devices'
+ _comp_subhandler_attr = 'routes'
+ _comp_subhandler_class = Route
+
+ @handler(u'Adds a route to : ip route add <net_addr> <prefix> <gateway> [device]')
+ def add(self, net_addr, prefix, gateway, dev=None):
+ if dev is not None:
+ ListComposedSubHandler.add(self, dev, net_addr, prefix, gateway)
+ else:
+ r = Route(net_addr, prefix, gateway)
+ if not r in self.parent.no_device_routes:
+ self.parent.no_device_routes.append(r)
+
+ @handler("Deletes a route : ip route delete <route_number_in_show> [dev]")
+ def delete(self, index, dev=None):
+ if dev is not None:
+ ListComposedSubHandler.delete(self, dev, index)
+ else:
+ i = int(index)
+ del self.parent.no_device_routes[i]
+
+ @handler("Shows routes : ip route show [dev]")
+ def show(self, dev=None):
+ if dev is not None:
+ return ListComposedSubHandler.show(self, dev)
+ else:
+ return self.parent.no_device_routes
+
+class AddressHandler(DictComposedSubHandler):
+ handler_help = u"Manage IP addresses"
+ _comp_subhandler_cont = 'devices'
+ _comp_subhandler_attr = 'addrs'
+ _comp_subhandler_class = Address
+
+
+class DeviceHandler(SubHandler):
+
+ handler_help = u"Manage network devices"
+
+ def __init__(self, parent):
+ log.debug(u'DeviceHandler(%r)', parent)
+ # FIXME remove templates to execute commands
+ from mako.template import Template
+ self.parent = parent
+ template_dir = path.join(path.dirname(__file__), 'templates')
+ dev_fn = path.join(template_dir, 'device')
+ self.device_template = Template(filename=dev_fn)
+
+ @handler(u'Bring the device up')
+ def up(self, name):
+ log.debug(u'DeviceHandler.up(%r)', name)
+ if name in self.parent.devices:
+ call(self.device_template.render(dev=name, action='up'), shell=True)
+ #bring up all the route asocitaed to the device
+ for route in self.parent.devices[name].routes:
+ try:
+ log.debug(u'IpHandler.up: adding %r', route)
+ call(self.parent._render_config('route_add', dict(
+ dev = name,
+ net_addr = route.net_addr,
+ prefix = route.prefix,
+ gateway = route.gateway,
+ )
+ ), shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler.up: error adding %r -> %r', route, e)
+ self.parent._bring_up_no_dev_routes()
+ self.parent._restart_services()
+ else:
+ log.debug(u'DeviceHandler.up: device not found')
+ raise DeviceNotFoundError(name)
+
+ @handler(u'Bring the device down')
+ def down(self, name):
+ log.debug(u'DeviceHandler.down(%r)', name)
+ if name in self.parent.devices:
+ call(self.device_template.render(dev=name, action='down'), shell=True)
+ self.parent._bring_up_no_dev_routes()
+ self.parent._restart_services()
+ else:
+ log.debug(u'DeviceHandler.up: device not found')
+ raise DeviceNotFoundError(name)
+
+ @handler(u'List all devices')
+ def list(self):
+ log.debug(u'DeviceHandler.list()')
+ return self.parent.devices.keys()
+
+ @handler(u'Get information about a device')
+ def show(self):
+ log.debug(u'DeviceHandler.show()')
+ return self.parent.devices.items()
+
+class IpHandler(Restorable, ConfigWriter, TransactionalHandler):
+
+ handler_help = u"Manage IP devices, addresses, routes and hops"
+
+ _persistent_attrs = ('devices','hops','no_device_routes')
+
+ _restorable_defaults = dict(
+ devices=get_network_devices(),
+ hops = list(),
+ no_device_routes = list(),
+ )
+
+ _config_writer_files = ('device', 'ip_add', 'ip_del', 'ip_flush',
+ 'route_add', 'route_del', 'route_flush', 'hop')
+ _config_writer_tpl_dir = path.join(path.dirname(__file__), 'templates')
+
+ def __init__(self, pickle_dir='.', config_dir='.'):
+ r"Initialize DhcpHandler object, see class documentation for details."
+ log.debug(u'IpHandler(%r, %r)', pickle_dir, config_dir)
+ self._persistent_dir = pickle_dir
+ self._config_writer_cfg_dir = config_dir
+ self._config_build_templates()
+ self._restore()
+ self._write_config()
+ self.addr = AddressHandler(self)
+ self.route = RouteHandler(self)
+ self.dev = DeviceHandler(self)
+ self.hop = HopHandler(self)
+ self.no_device_routes = list()
+ self.services = list()
+
+ def _write_config(self):
+ r"_write_config() -> None :: Execute all commands."
+ log.debug(u'IpHandler._write_config()')
+ for device in self.devices.values():
+ log.debug(u'IpHandler._write_config: processing device %s', device)
+ if device.active:
+ self._write_config_for_device(device)
+ self._bring_up_no_dev_routes()
+ self._write_hops()
+
+ def _bring_up_no_dev_routes(self):
+ log.debug(u'IpHandler._bring_up_no_dev_routes()')
+ for route in self.no_device_routes:
+ try:
+ log.debug(u'IpHandler._bring_up_no_dev_routes: add %r', route)
+ call(self._render_config('route_add', dict(
+ dev = None,
+ net_addr = route.net_addr,
+ prefix = route.prefix,
+ gateway = route.gateway,
+ )
+ ), shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_config: error flushing -> %r', e)
+
+ def _write_hops(self):
+ r"_write_hops() -> None :: Execute all hops."
+ log.debug(u'IpHandler._write_hops()')
+ if self.hops:
+ log.debug(u'IpHandler._write_hops: we have hops: %r', self.hops)
+ try:
+ log.debug(u'IpHandler._write_hops: flushing default hops')
+ call('ip route del default', shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_hops: error adding -> %r', e)
+ try:
+ log.debug(u'IpHandler._write_hops: configuring hops')
+ #get hops for active devices
+ active_hops = dict()
+ for h in self.hops:
+ if h.device in self.devices:
+ if self.devices[h.device].active:
+ active_hops.append(h)
+ call(self._render_config('hop', dict(
+ hops = active_hops,
+ )
+ ), shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_hops: error adding -> %r', e)
+
+ def _write_config_for_device(self, device):
+ r"_write_config_for_device(self, device) -> None :: Execute commands."
+ log.debug(u'IpHandler._write_config_for_device()')
+ try:
+ log.debug(u'IpHandler._write_config_for_device: flushing routes...')
+ call(self._render_config('route_flush', dict(dev=device.name)),
+ shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_config_for_device: error flushing '
+ u'-> %r', e)
+ try:
+ log.debug(u'IpHandler._write_config_for_device: flushing addrs...')
+ call(self._render_config('ip_flush', dict(dev=device.name)),
+ shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_config_for_device: error flushing '
+ u'-> %r', e)
+ for address in device.addrs.values():
+ broadcast = address.broadcast
+ if broadcast is None:
+ broadcast = '+'
+ try:
+ log.debug(u'IpHandler._write_config_for_device: adding %r',
+ address)
+ call(self._render_config('ip_add', dict(
+ dev = device.name,
+ addr = address.ip,
+ netmask = address.netmask,
+ peer = address.peer,
+ broadcast = broadcast,
+ )
+ ), shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_config_for_device: error adding '
+ u'-> %r', e)
+ for route in device.routes:
+ try:
+ log.debug(u'IpHandler._write_config_for_device: adding %r',
+ route)
+ call(self._render_config('route_add', dict(
+ dev = device.name,
+ net_addr = route.net_addr,
+ prefix = route.prefix,
+ gateway = route.gateway,
+ )
+ ), shell=True)
+ except ExecutionError, e:
+ log.debug(u'IpHandler._write_config_for_device: error adding '
+ u'-> %r', e)
+
+ def handle_timer(self):
+ log.debug(u'IpHandler.handle_timer()')
+ self.refresh_devices()
+
+ def refresh_devices(self):
+ log.debug(u'IpHandler.update_devices()')
+ devices = get_network_devices()
+ #add not registered and active devices
+ go_active = False
+ for k,v in devices.items():
+ if k not in self.devices:
+ log.debug(u'IpHandler.update_devices: adding %r', v)
+ self.devices[k] = v
+ elif not self.devices[k].active:
+ self.active = True
+ go_active = True
+ self._write_config_for_device(self.devices[k])
+ if go_active:
+ self._write_hops()
+ self._bring_up_no_dev_routes()
+ self._restart_services()
+
+ #mark inactive devices
+ for k in self.devices.keys():
+ go_down = False
+ if k not in devices:
+ log.debug(u'IpHandler.update_devices: removing %s', k)
+ self.devices[k].active = False
+ go_down = True
+ if go_down:
+ self._bring_up_no_dev_routes()
+
+ def _restart_services(self):
+ for s in self.services:
+ if s._service_running:
+ try:
+ s.stop()
+ except ExecutionError:
+ pass
+ try:
+ s.start()
+ except ExecutionError:
+ pass
+
+ #hooks a service to the ip handler, so when
+ #a device is brought up one can restart the service
+ #that need to refresh their device list
+ def device_up_hook(self, serv):
+ if hasattr(serv, 'stop') and hasattr(serv, 'start'):
+ self.services.append(serv)
+
+
+
+
+
+if __name__ == '__main__':
+
+ logging.basicConfig(
+ level = logging.DEBUG,
+ format = '%(asctime)s %(levelname)-8s %(message)s',
+ datefmt = '%H:%M:%S',
+ )
+
+ ip = IpHandler()
+ print '----------------------'
+ ip.hop.add('201.21.32.53','eth0')
+ ip.hop.add('205.65.65.25','eth1')
+ ip.commit()
+ ip.dev.up('eth0')
+ ip.addr.add('eth0','192.168.0.23','24','192.168.255.255')
+ ip.addr.add('eth0','192.168.0.26','24')
+ ip.commit()
+ ip.route.add('eth0','192.168.0.0','24','192.168.0.1')
+ ip.route.add('eth0','192.168.0.5','24','192.168.0.1')
+ ip.commit()
+ ip.hop.delete('201.21.32.53','eth0')
+ ip.route.clear('eth0')
+ ip.commit()
+
+
+
projects / software / pymin.git / commitdiff