-from os import path
-
-from seqtools import Sequence
-from dispatcher import Handler, handler, HandlerError
-from services.util import Restorable, ConfigWriter
-from services.util import InitdHandler, TransactionalHandler
-
-__ALL__ = ('DhcpHandler', 'Error', 'HostError', 'HostAlreadyExistsError',
- 'HostNotFoundError', 'ParameterError', 'ParameterNotFoundError')
-
-class Error(HandlerError):
- r"""
- Error(message) -> Error instance :: Base DhcpHandler exception class.
-
- All exceptions raised by the DhcpHandler inherits from this one, so you can
- easily catch any DhcpHandler 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 HostError(Error, KeyError):
- r"""
- HostError(hostname) -> HostError instance
-
- This is the base exception for all host related errors.
- """
-
- def __init__(self, hostname):
- r"Initialize the object. See class documentation for more info."
- self.message = 'Host error: "%s"' % hostname
-
-class HostAlreadyExistsError(HostError):
- r"""
- HostAlreadyExistsError(hostname) -> HostAlreadyExistsError instance
-
- This exception is raised when trying to add a hostname that already exists.
- """
-
- def __init__(self, hostname):
- r"Initialize the object. See class documentation for more info."
- self.message = 'Host already exists: "%s"' % hostname
-
-class HostNotFoundError(HostError):
- r"""
- HostNotFoundError(hostname) -> HostNotFoundError instance
-
- This exception is raised when trying to operate on a hostname that doesn't
- exists.
- """
-
- def __init__(self, hostname):
- r"Initialize the object. See class documentation for more info."
- self.message = 'Host not found: "%s"' % hostname
-
-class ParameterError(Error, KeyError):
- r"""
- ParameterError(paramname) -> ParameterError instance
-
- This is the base exception for all DhcpHandler parameters related errors.
- """
-
- def __init__(self, paramname):
- r"Initialize the object. See class documentation for more info."
- self.message = 'Parameter error: "%s"' % paramname
-
-class ParameterNotFoundError(ParameterError):
- r"""
- ParameterNotFoundError(hostname) -> ParameterNotFoundError instance
-
- This exception is raised when trying to operate on a parameter that doesn't
- exists.
- """
-
- def __init__(self, paramname):
- r"Initialize the object. See class documentation for more info."
- self.message = 'Parameter not found: "%s"' % paramname
-
-
-class Host(Sequence):
- r"""Host(name, ip, mac) -> Host instance :: Class representing a host.
-
- name - Host name, should be a fully qualified name, but no checks are done.
- ip - IP assigned to the hostname.
- mac - MAC address to associate to the hostname.
- """
-
- def __init__(self, name, ip, mac):
- r"Initialize Host object, see class documentation for details."
- self.name = name
- self.ip = ip
- self.mac = mac
-
- def as_tuple(self):
- r"Return a tuple representing the host."
- return (self.name, self.ip, self.mac)
-
-class HostHandler(Handler):
- r"""HostHandler(hosts) -> HostHandler instance :: Handle a list of hosts.
-
- This class is a helper for DhcpHandler to do all the work related to hosts
- administration.
-
- hosts - A dictionary with string keys (hostnames) and Host instances values.
- """
-
- def __init__(self, hosts):
- r"Initialize HostHandler object, see class documentation for details."
- self.hosts = hosts
-
- @handler(u'Add a new host.')
- def add(self, name, ip, mac):
- r"add(name, ip, mac) -> None :: Add a host to the hosts list."
- if name in self.hosts:
- raise HostAlreadyExistsError(name)
- self.hosts[name] = Host(name, ip, mac)
-
- @handler(u'Update a host.')
- def update(self, name, ip=None, mac=None):
- r"update(name[, ip[, mac]]) -> None :: Update a host of the hosts list."
- if not name in self.hosts:
- raise HostNotFoundError(name)
- if ip is not None:
- self.hosts[name].ip = ip
- if mac is not None:
- self.hosts[name].mac = mac
-
- @handler(u'Delete a host.')
- def delete(self, name):
- r"delete(name) -> None :: Delete a host of the hosts list."
- if not name in self.hosts:
- raise HostNotFoundError(name)
- del self.hosts[name]
-
- @handler(u'Get information about a host.')
- def get(self, name):
- r"get(name) -> Host :: List all the information of a host."
- if not name in self.hosts:
- raise HostNotFoundError(name)
- return self.hosts[name]
-
- @handler(u'List hosts.')
- def list(self):
- r"list() -> tuple :: List all the hostnames."
- return self.hosts.keys()
-
- @handler(u'Get information about all hosts.')
- def show(self):
- r"show() -> list of Hosts :: List all the complete hosts information."
- return self.hosts.values()
-
-class DhcpHandler(Restorable, ConfigWriter, InitdHandler, TransactionalHandler):
- r"""DhcpHandler([pickle_dir[, config_dir]]) -> DhcpHandler instance.
-
- Handles DHCP service commands for the dhcpd program.
-
- pickle_dir - Directory where to write the persistent configuration data.
-
- config_dir - Directory where to store de generated configuration files.
-
- Both defaults to the current working directory.
- """
-
- _initd_name = 'dhcpd'
-
- _persistent_vars = ('vars', 'hosts')
-
- _restorable_defaults = dict(
- hosts = dict(),
- vars = dict(
- domain_name = 'example.com',
- dns_1 = 'ns1.example.com',
- dns_2 = 'ns2.example.com',
- net_address = '192.168.0.0',
- net_mask = '255.255.255.0',
- net_start = '192.168.0.100',
- net_end = '192.168.0.200',
- net_gateway = '192.168.0.1',
- ),
- )
-
- _config_writer_files = 'dhcpd.conf'
- _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."
- self._persistent_dir = pickle_dir
- self._config_writer_cfg_dir = config_dir
- self._config_build_templates()
- self._restore()
- self.host = HostHandler(self.hosts)
-
- def _get_config_vars(self, config_file):
- return dict(hosts=self.hosts.values(), **self.vars)
-
- @handler(u'Set a DHCP parameter.')
- def set(self, param, value):
- r"set(param, value) -> None :: Set a DHCP parameter."
- if not param in self.vars:
- raise ParameterNotFoundError(param)
- self.vars[param] = value
-
- @handler(u'Get a DHCP parameter.')
- def get(self, param):
- r"get(param) -> None :: Get a DHCP parameter."
- if not param in self.vars:
- raise ParameterNotFoundError(param)
- return self.vars[param]
-
- @handler(u'List all available DHCP parameters.')
- def list(self):
- r"list() -> tuple :: List all the parameter names."
- return self.vars.keys()
-
- @handler(u'Get all DHCP parameters, with their values.')
- def show(self):
- r"show() -> (key, value) tuples :: List all the parameters."
- return self.vars.items()
-
-if __name__ == '__main__':
-
- import os
-
- h = DhcpHandler()
-
- def dump():
- print '-' * 80
- print 'Variables:', h.list()
- print h.show()
- print
- print 'Hosts:', h.host.list()
- print h.host.show()
- print '-' * 80
-
- dump()
-
- h.host.add('my_name','192.168.0.102','00:12:ff:56')
-
- h.host.update('my_name','192.168.0.192','00:12:ff:56')
-
- h.host.add('nico','192.168.0.188','00:00:00:00')
-
- h.set('domain_name','baryon.com.ar')
-
- try:
- h.set('sarasa','baryon.com.ar')
- except KeyError, e:
- print 'Error:', e
-
- h.commit()
-
- dump()
-
- os.system('rm -f *.pkl ' + ' '.join(h._config_writer_files))
projects / software / pymin.git / blobdiff