X-Git-Url: https://git.llucax.com/software/pymin.git/blobdiff_plain/a649c1cfd693f916ad7e57cc07f71f4a687ee2c9..09ea1d35ebdfec884409a2e567946464822a1cd3:/pymin/services/ip/__init__.py?ds=sidebyside diff --git a/pymin/services/ip/__init__.py b/pymin/services/ip/__init__.py index 94d681b..b1d50b2 100644 --- a/pymin/services/ip/__init__.py +++ b/pymin/services/ip/__init__.py @@ -8,38 +8,135 @@ from pymin.dispatcher import handler, HandlerError, Handler from pymin.services.util import Restorable, ConfigWriter, InitdHandler, \ TransactionalHandler, SubHandler, call, \ get_network_devices, ListComposedSubHandler, \ - DictComposedSubHandler + DictComposedSubHandler, Device, Address, ExecutionError __ALL__ = ('IpHandler',) +# TODO: convertir HopHandler a ComposedSubHandler + +class HopError(HandlerError): + + def __init__(self, hop): + self.message = u'Hop error : "%s"' % hop + +class HopNotFoundError(HopError): + + def __init__(self, hop): + self.message = u'Hop not found : "%s"' % hop + +class HopAlreadyExistsError(HopError): + + def __init__(self, hop): + self.message = u'Hop already exists : "%s"' % hop + + +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(Handler): + + def __init__(self, parent): + self.parent = parent + + @handler('Adds a hop : add ') + def add(self, gw, dev): + if not dev in self.parent.devices: + raise DeviceNotFoundError(device) + h = Hop(gw, dev) + try: + self.parent.hops.index(h) + raise HopAlreadyExistsError(gw + '->' + dev) + except ValueError: + self.parent.hops.append(h) + + @handler(u'Deletes a hop : delete ') + def delete(self, gw, dev): + if not dev in self.parent.devices: + raise DeviceNotFoundError(device) + h = Hop(gw, dev) + try: + self.parent.hops.remove(h) + except ValueError: + raise HopNotFoundError(gw + '->' + dev) + + @handler(u'Lists hops : list ') + def list(self, device): + try: + k = self.parent.hops.keys() + except ValueError: + k = list() + return k + + @handler(u'Get information about all hops: show ') + def show(self, device): + try: + k = self.parent.hops.values() + except ValueError: + k = list() + return k + 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 -class Address(Sequence): - def __init__(self, ip, netmask, broadcast=None): - self.ip = ip - self.netmask = netmask - self.broadcast = broadcast - def update(self, netmask=None, broadcast=None): - if netmask is not None: self.netmask = netmask - if broadcast is not None: self.broadcast = broadcast - def as_tuple(self): - return (self.ip, self.netmask, self.broadcast) + @handler(u'Adds a route to : ip route add [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 [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" @@ -47,14 +144,6 @@ class AddressHandler(DictComposedSubHandler): _comp_subhandler_attr = 'addrs' _comp_subhandler_class = Address -class Device(Sequence): - def __init__(self, name, mac): - self.name = name - self.mac = mac - self.addrs = dict() - self.routes = list() - def as_tuple(self): - return (self.name, self.mac) class DeviceHandler(SubHandler): @@ -72,6 +161,20 @@ class DeviceHandler(SubHandler): def up(self, 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: + 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: + print e + self.parent._bring_up_no_dev_routes() + self.parent._restart_services() else: raise DeviceNotFoundError(name) @@ -79,6 +182,8 @@ class DeviceHandler(SubHandler): def down(self, 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: raise DeviceNotFoundError(name) @@ -92,15 +197,18 @@ class DeviceHandler(SubHandler): class IpHandler(Restorable, ConfigWriter, TransactionalHandler): - handler_help = u"Manage IP devices, addresses and routes" + handler_help = u"Manage IP devices, addresses, routes and hops" - _persistent_attrs = 'devices' + _persistent_attrs = ('devices','hops','no_device_routes') - _restorable_defaults = dict(devices=dict((dev, Device(dev, mac)) - for (dev, mac) in get_network_devices().items())) + _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') + 'route_add', 'route_del', 'route_flush', 'hop') _config_writer_tpl_dir = path.join(path.dirname(__file__), 'templates') def __init__(self, pickle_dir='.', config_dir='.'): @@ -109,24 +217,83 @@ class IpHandler(Restorable, ConfigWriter, TransactionalHandler): 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." for device in self.devices.values(): + 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): + for route in self.no_device_routes: + try: + 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: + print e + + def _write_hops(self): + r"_write_hops() -> None :: Execute all hops." + if self.hops: + try: + call('ip route del default', shell=True) + except ExecutionError, e: + print e + try: + #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: + print e + + def _write_config_for_device(self, device): + r"_write_config_for_device(self, device) -> None :: Execute all commands for a device." + try: call(self._render_config('route_flush', dict(dev=device.name)), shell=True) + except ExecutionError, e: + print e + try: call(self._render_config('ip_flush', dict(dev=device.name)), shell=True) - for address in device.addrs.values(): + except ExecutionError, e: + print e + for address in device.addrs.values(): + broadcast = address.broadcast + if broadcast is None: + broadcast = '+' + try: call(self._render_config('ip_add', dict( - dev = device.name, - addr = address.ip, - netmask = address.netmask, - broadcast = address.broadcast, + dev = device.name, + addr = address.ip, + netmask = address.netmask, + peer = address.peer, + broadcast = broadcast, ) ), shell=True) - for route in device.routes: + except ExecutionError, e: + print e + for route in device.routes: + try: call(self._render_config('route_add', dict( dev = device.name, net_addr = route.net_addr, @@ -134,12 +301,68 @@ class IpHandler(Restorable, ConfigWriter, TransactionalHandler): gateway = route.gateway, ) ), shell=True) + except ExecutionError, e: + print e + + def handle_timer(self): + self.refresh_devices() + + + def refresh_devices(self): + 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: + 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: + 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__': - ip = IpHandler() + ip = IpHanlder() 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') @@ -147,11 +370,9 @@ if __name__ == '__main__': 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() - ip.addr.delete('eth0','192.168.0.23') - ip.commit() -