# vim: set encoding=utf-8 et sw=4 sts=4 :
-from mako.template import Template
-from mako.runtime import Context
from subprocess import Popen, PIPE
from os import path
-try:
- import cPickle as pickle
-except ImportError:
- import pickle
-
-try:
- from seqtools import Sequence
-except ImportError:
- # NOP for testing
- class Sequence: pass
-try:
- from dispatcher import handler, HandlerError, Handler
-except ImportError:
- # NOP for testing
- class HandlerError(RuntimeError): pass
- class Handler: pass
- def handler(help):
- def wrapper(f):
- return f
- return wrapper
+
+from seqtools import Sequence
+from dispatcher import handler, HandlerError, Handler
+from services.util import Restorable, ConfigWriter
+from services.util import InitdHandler, TransactionalHandler
__ALL__ = ('IpHandler','Error','DeviceError','DeviceNotFoundError','RouteError','RouteNotFoundError',
'RouteAlreadyExistsError','AddressError','AddressNotFoundError','AddressAlreadyExistsError')
-pickle_ext = '.pkl'
-pickle_devices = 'devs'
-
-template_dir = path.join(path.dirname(__file__), 'templates')
-command_filename = 'command'
-
-
-device_com = 'device.command'
-ip_add_com = 'ip_add.command'
-ip_del_com = 'ip_del.command'
-ip_flush_com = 'ip_flush.command'
-route_add_com = 'route_add.command'
-route_del_com = 'route_del.command'
-route_flush_com = 'route_flush.command'
-
class Error(HandlerError):
r"""
Error(command) -> Error instance :: Base IpHandler exception class.
class DeviceHandler(Handler):
def __init__(self, devices):
+ # FIXME remove templates to execute commands
+ from mako.template import Template
self.devices = devices
- dev_fn = path.join(template_dir, device_com)
+ 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 show(self):
return self.devices.items()
-class IpHandler(Handler):
+def get_devices():
+ p = Popen(('ip', 'link', 'list'), stdout=PIPE, close_fds=True)
+ string = p.stdout.read()
+ p.wait()
+ d = dict()
+ i = string.find('eth')
+ while i != -1:
+ eth = string[i:i+4]
+ m = string.find('link/ether', i+4)
+ mac = string[ m+11 : m+11+17]
+ d[eth] = Device(eth, mac)
+ i = string.find('eth', m+11+17)
+ return d
- def __init__(self, pickle_dir='.', config_dir='.'):
- r"Initialize DhcpHandler object, see class documentation for details."
+class IpHandler(Restorable, ConfigWriter, TransactionalHandler):
- self.pickle_dir = pickle_dir
- self.config_dir = config_dir
+ _persistent_attrs = 'devices'
- ip_add_fn = path.join(template_dir, ip_add_com)
- ip_del_fn = path.join(template_dir, ip_del_com)
- ip_flush_fn = path.join(template_dir, ip_flush_com)
- self.ip_add_template = Template(filename=ip_add_fn)
- self.ip_del_template = Template(filename=ip_del_fn)
- self.ip_flush_template = Template(filename=ip_flush_fn)
+ _restorable_defaults = dict(devices=get_devices())
- route_add_fn = path.join(template_dir, route_add_com)
- route_del_fn = path.join(template_dir, route_del_com)
- route_flush_fn = path.join(template_dir, route_flush_com)
- self.route_add_template = Template(filename=route_add_fn)
- self.route_del_template = Template(filename=route_del_fn)
- self.route_flush_template = Template(filename=route_flush_fn)
+ _config_writer_files = ('device', 'ip_add', 'ip_del', 'ip_flush',
+ 'route_add', 'route_del', 'route_flush')
+ _config_writer_tpl_dir = path.join(path.dirname(__file__), 'templates')
- try:
- self._load()
- except IOError:
- p = Popen('ip link list', shell=True, stdout=PIPE, close_fds=True)
- devs = _get_devices(p.stdout.read())
- self.devices = dict()
- for eth, mac in devs:
- self.devices[eth] = Device(eth, mac)
- self._dump()
+ def __init__(self, pickle_dir='.', config_dir='.'):
+ r"Initialize DhcpHandler object, see class documentation for details."
+ self._persistent_dir = pickle_dir
+ self._config_writer_cfg_dir = config_dir
+ self._config_build_templates()
+ self._restore()
self.addr = AddressHandler(self.devices)
self.route = RouteHandler(self.devices)
self.dev = DeviceHandler(self.devices)
- self.commit()
-
- @handler(u'Commit the changes (reloading the service, if necessary).')
- def commit(self):
- r"commit() -> None :: Commit the changes and reload the DHCP service."
- #esto seria para poner en una interfaz
- #y seria que hace el pickle deberia llamarse
- #al hacerse un commit
- self._dump()
- self._write_config()
-
- @handler(u'Discard all the uncommited changes.')
- def rollback(self):
- r"rollback() -> None :: Discard the changes not yet commited."
- self._load()
-
- def _dump(self):
- r"_dump() -> None :: Dump all persistent data to pickle files."
- # XXX podría ir en una clase base
- self._dump_var(self.devices, pickle_devices)
-
-
- def _load(self):
- r"_load() -> None :: Load all persistent data from pickle files."
- # XXX podría ir en una clase base
- self.devices = self._load_var(pickle_devices)
-
- def _pickle_filename(self, name):
- r"_pickle_filename() -> string :: Construct a pickle filename."
- # XXX podría ir en una clase base
- return path.join(self.pickle_dir, name) + pickle_ext
-
- def _dump_var(self, var, name):
- r"_dump_var() -> None :: Dump a especific variable to a pickle file."
- # XXX podría ir en una clase base
- pkl_file = file(self._pickle_filename(name), 'wb')
- pickle.dump(var, pkl_file, 2)
- pkl_file.close()
-
- def _load_var(self, name):
- r"_load_var()7 -> object :: Load a especific pickle file."
- # XXX podría ir en una clase base
- return pickle.load(file(self._pickle_filename(name)))
def _write_config(self):
r"_write_config() -> None :: Execute all commands."
for device in self.devices.values():
- print self.route_flush_template.render(dev=device.name)
- print self.ip_flush_template.render(dev=device.name)
+ print self._render_config('route_flush', dict(dev=device.name))
+ print self._render_config('ip_flush', dict(dev=device.name))
for address in device.addrs.values():
- print self.ip_add_template.render(
- dev=device.name,
- addr=address.ip,
- prefix=address.prefix,
- broadcast=address.broadcast
+ print self._render_config('ip_add', dict(
+ dev = device.name,
+ addr = address.ip,
+ prefix = address.prefix,
+ broadcast = address.broadcast,
)
+ )
for route in device.routes:
- print self.route_add_template.render(
- dev=device.name,
- net_addr=route.net_addr,
- prefix=route.prefix,
- gateway=route.gateway
+ print self._render_config('route_add', dict(
+ dev = device.name,
+ net_addr = route.net_addr,
+ prefix = route.prefix,
+ gateway = route.gateway,
)
+ )
-def _get_devices(string):
- l = list()
- i = string.find('eth')
- while i != -1:
- eth = string[i:i+4]
- m = string.find('link/ether', i+4)
- mac = string[ m+11 : m+11+17]
- l.append((eth,mac))
- i = string.find('eth', m+11+17)
- return l
if __name__ == '__main__':
projects / software / pymin.git / blobdiff