# vim: set encoding=utf-8 et sw=4 sts=4 :
-from mako.template import Template
-from mako.runtime import Context
-from os import path
-try:
- import cPickle as pickle
-except ImportError:
- import pickle
+from handler import IpHandler
-try:
- from seqtools import Sequence
-except ImportError:
- # NOP for testing
- class Sequence: pass
-try:
- from dispatcher import handler, HandlerError
-except ImportError:
- # NOP for testing
- class HandlerError(RuntimeError): pass
- def handler(f): return f
+def get_service(config):
+ return IpHandler(config.ip.pickle_dir, config.ip.config_dir)
-__ALL__ = ('IpHandler',)
-
-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.
-
- All exceptions raised by the IpHandler inherits from this one, so you can
- easily catch any IpHandler exception.
-
- message - A descriptive error message.
- """
-
- def __init__(self, message):
- r"Initialize the Error object. See class documentation for more info."
- self.message = message
-
- def __str__(self):
- return self.message
-
-class DeviceError(Error):
-
- def __init__(self, device):
- self.message = 'Device error : "%s"' % device
-
-class DeviceNotFoundError(DeviceError):
-
- def __init__(self, device):
- self.message = 'Device not found : "%s"' % device
-
-class AddressError(Error):
-
- def __init__(self, addr):
- self.message = 'Address error : "%s"' % addr
-
-class AddressNotFoundError(AddressError):
-
- def __init__(self, address):
- self.message = 'Address not found : "%s"' % address
-
-class AddressAlreadyExistsError(AddressError):
-
- def __init__(self, address):
- self.message = 'Address already exists : "%s"' % address
-
-class RouteError(Error):
-
- def __init__(self, route):
- self.message = 'Route error : "%s"' % route
-
-class RouteNotFoundError(RouteError):
-
- def __init__(self, route):
- self.message = 'Route not found : "%s"' % route
-
-class RouteAlreadyExistsError(RouteError):
-
- def __init__(self, route):
- self.message = 'Route already exists : "%s"' % route
-
-class Route(Sequence):
-
- def __init__(self, net_addr, prefix, gateway):
- self.net_addr = net_addr
- self.prefix = prefix
- self.gateway = gateway
-
- def as_tuple(self):
- return(self.addr, self.prefix, self.gateway)
-
-class RouteHandler:
-
- def __init__(self, devices, config_dir, ip_handler):
- self.devices = 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)
- self.config_dir = config_dir
- self.ip_handler = ip_handler
-
- @handler
- def add(self, device, net_addr, prefix, gateway):
- if not device in self.devices:
- raise DeviceNotFoundError(device)
- r = Route(net_addr, prefix, gateway)
- try:
- self.devices[device].routes.index(r)
- raise RouteAlreadyExistsError(net_addr + '/' + prefix + '->' + gateway)
- except ValueError:
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=device, net_addr=net_addr, prefix=prefix, gateway=gateway)
- self.route_add_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- self.devices[device].routes.append(r)
- self.ip_handler.commit()
-
-
- @handler
- def delete(self, device, net_addr, prefix, gateway):
- if not device in self.devices:
- raise DeviceNotFoundError(device)
- r = Route(net_addr, prefix, gateway)
- #try:
- #i = self.devices[device].routes.index(r)
- #out_file = file(path.join(self.config_dir, command_filename), 'w')
- #ctx = Context(out_file, dev=device, net_addr=net_addr, prefix=prefix, gateway=gateway)
- #self.route_add_template.render_context(ctx)
- #out_file.close()
- #execute_command(self.config_dir)
- #self.devices[device].routes.append(r)
- #self.ip_handler.commit()
-
- #except ValueError:
- #raise RouteNotFoundError(net_addr + '/' + prefix + '->' + gateway)
-
- @handler
- def flush(self, device):
- if not device in self.devices:
- raise DeviceNotFoundError(device)
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=device)
- self.route_flush_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- self.devices[device].routes = list()
- self.ip_handler.commit()
-
- @handler
- def list(self, device):
- try:
- k = self.devices[device].routes.keys()
- except ValueError:
- k = list()
- return k
-
- @handler
- def show(self):
- try:
- k = self.devices[device].routes.values()
- except ValueError:
- k = list()
- return k
-
-class Address(Sequence):
-
- def __init__(self, ip, prefix, broadcast):
- self.ip = ip
- self.prefix = prefix
- self.broadcast = broadcast
-
- def as_tuple(self):
- return (self.ip, self.prefix, self.broadcast)
-
-class AddressHandler:
-
- def __init__(self, devices, config_dir, ip_handler):
- self.devices = devices
- self.config_dir = config_dir
- 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)
- self.ip_handler = ip_handler
-
-
- @handler
- def add(self, device, ip, prefix, broadcast='+'):
- if not device in self.devices:
- raise DeviceNotFoundError(device)
- if ip in self.devices[device].addrs:
- raise AddressAlreadyExistsError(ip)
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=device, addr=ip, prefix=prefix, broadcast=broadcast)
- self.ip_add_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- self.devices[device].addrs[ip] = Address(ip, prefix, broadcast)
- self.ip_handler.commit()
-
- @handler
- def delete(self, device, ip):
- if not device in self.devices:
- raise DeviceNotFoundError(device)
- if not ip in self.devices[device].addrs:
- raise AddressNotFoundError(ip)
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=device, addr=ip, prefix=self.devices[device].addrs[ip].prefix)
- self.ip_del_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- del self.devices[device].addrs[ip]
- self.ip_handler.commit()
-
-
- @handler
- def flush(self, device):
- if not device in self.devices:
- raise DeviceNotFoundError(device)
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=device)
- self.ip_flush_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- self.devices[device].addrs = dict()
- self.ip_handler.commit()
-
-
- @handler
- def list(self, device):
- try:
- k = self.devices[device].addrs.keys()
- except ValueError:
- k = list()
- return k
-
- @handler
- def show(self, device):
- try:
- k = self.devices[device].addrs.values()
- except ValueError:
- k = list()
- return k
-
-class Device(Sequence):
-
- def __init__(self, name):
- self.name = name
- self.addrs = dict()
- self.routes = list()
-
- def as_tuple(self):
- return (self.name, self.addrs, self.routes)
-
-class DeviceHandler:
-
- def __init__(self, devices, config_dir = '.'):
- self.devices = devices
- dev_fn = path.join(template_dir, device_com)
- self.device_template = Template(filename=dev_fn)
- self.config_dir = config_dir
-
- @handler
- def up(self, name):
- if name in self.devices:
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=name, action='up')
- self.device_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- else:
- raise DeviceNotFoundError(name)
-
- @handler
- def down(self, name):
- if name in self.devices:
- out_file = file(path.join(self.config_dir, command_filename), 'w')
- ctx = Context(out_file, dev=name, action='down')
- self.device_template.render_context(ctx)
- out_file.close()
- execute_command(self.config_dir)
- else:
- raise DeviceNotFoundError(name)
-
- @handler
- def list(self):
- return self.devices.keys()
-
- @handler
- def show(self):
- return self.devices.items()
-
-def execute_command(config_dir):
- out_file = file(path.join(config_dir, command_filename), 'r')
- print out_file.read()
- out_file.close()
-
-class IpHandler:
-
- def __init__(self, pickle_dir='.', config_dir='.'):
- r"Initialize DhcpHandler object, see class documentation for details."
-
- self.pickle_dir = pickle_dir
- self.config_dir = config_dir
-
- try:
- self._load()
- except IOError:
- # This is the first time the handler is used, create a basic
- # setup using some nice defaults
- self.devices = dict(
- eth0=Device('eth0'),
- eth1=Device('eth1'),
- )
- self._dump()
- self.addr = AddressHandler(self.devices, config_dir, self)
- self.route = RouteHandler(self.devices, config_dir, self)
- self.dev = DeviceHandler(self.devices, config_dir)
- self._write_config()
-
- 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
- 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() -> 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."
- pass
-
-
-
-
-if __name__ == '__main__':
-
- ip = IpHandler()
- ip.dev.up('eth0')
- ip.dev.down('eth0')
- ip.dev.show()
- ip.addr.add('eth0','192.168.0.23','24','192.168.255.255')
- ip.addr.add('eth0','192.168.0.26','24')
- ip.addr.show('eth0')
- ip.addr.flush('eth0')
- ip.route.add('eth0','192.168.0.0','24','192.168.0.1')
- ip.route.flush('eth0')
- #ip.addr.delete('eth0','192.168.0.23')
- #ip.addr.delete('eth0','192.168.0.26')
\ No newline at end of file
projects / software / pymin.git / blobdiff