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vrouterapi.py
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vrouterapi.py
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import logging
import copy
from uuid import uuid1
from vlcp.server.module import Module,depend,api,call_api
from vlcp.event.runnable import RoutineContainer
from vlcp.utils.networkmodel import *
from vlcp.utils.dataobject import watch_context,set_new,dump,ReferenceObject,\
request_context, create_new
from vlcp.utils.ethernet import ip4_addr
from vlcp.utils.netutils import format_network_cidr,check_ip_address, parse_ip4_network, ip_in_network,\
parse_ip4_address
import vlcp.service.kvdb.objectdb as objectdb
from vlcp.config.config import defaultconfig
from pychecktype.checked import checked
from pychecktype import tuple_
from vlcp.utils.typelib import ip_address_type, cidr_nonstrict_type
from collections import OrderedDict
from contextlib import suppress
from vlcp.utils.exceptions import WalkKeyNotRetrieved
@depend(objectdb.ObjectDB)
@defaultconfig
class VRouterApi(Module):
"""
Standard network model for L3 SDN
"""
def __init__(self,server):
super(VRouterApi,self).__init__(server)
self.app_routine = RoutineContainer(self.scheduler)
self._reqid = 0
self.createAPI(api(self.createvirtualrouter,self.app_routine),
api(self.createvirtualrouters,self.app_routine),
api(self.updatevirtualrouter,self.app_routine),
api(self.updatevirtualrouters,self.app_routine),
api(self.deletevirtualrouter,self.app_routine),
api(self.deletevirtualrouters,self.app_routine),
api(self.listvirtualrouters,self.app_routine),
api(self.addrouterinterface,self.app_routine),
api(self.addrouterinterfaces,self.app_routine),
api(self.removerouterinterface,self.app_routine),
api(self.removerouterinterfaces,self.app_routine),
api(self.listrouterinterfaces,self.app_routine))
async def _dumpkeys(self, keys, filter=None):
self._reqid += 1
reqid = ('virtualrouter', self._reqid)
with request_context(reqid, self.app_routine):
retobjs = await call_api(self.app_routine,'objectdb','mget',{'keys':keys,'requestid':reqid})
if filter is None:
return [dump(o) for o in retobjs]
else:
return [dump(o) for o in retobjs if o is not None and all(getattr(o, k, None) == v for k, v in filter.items())]
async def _dumpone(self, key, filter):
return await self._dumpkeys([key], filter)
async def createvirtualrouter(self, id: (str, None) = None,
**kwargs: {"?routes": [tuple_((cidr_nonstrict_type, ip_address_type))]}):
"""
Create a virtual router
:param id: Virtual router id. If omitted, an UUID is generated.
:param \*\*kwargs: extra attributes for creation.
:return: A dictionary of information of the virtual router.
"""
if not id:
id = str(uuid1())
router = {"id":id}
router.update(kwargs)
return await self.createvirtualrouters([router])
@checked
async def createvirtualrouters(self, routers: [{"?id": str,
"?routes": [tuple_((cidr_nonstrict_type, ip_address_type))]}]):
"""
Create multiple virtual routers in a transaction
"""
idset = set()
newrouters = []
for router in routers:
router = copy.deepcopy(router)
if "id" not in router:
router["id"] = str(uuid1())
else:
if router["id"] in idset:
raise ValueError("Repeated ID: " + router['id'])
else:
idset.add(router['id'])
newrouters.append(router)
routerkeys = [VRouter.default_key(r['id']) for r in newrouters]
routersetkey = [VRouterSet.default_key()]
routerobjects = [self._createvirtualrouter(**r) for r in newrouters ]
def createrouterdb(keys,values):
routerset = values[0]
for i in range(0,len(routerkeys)):
values[i+1] = set_new(values[i+1],routerobjects[i])
routerset.set.dataset().add(routerobjects[i].create_weakreference())
return keys,values
await call_api(self.app_routine,"objectdb","transact",
{"keys":routersetkey+routerkeys,"updater":createrouterdb})
return await self._dumpkeys(routerkeys)
def _createvirtualrouter(self,id,**kwargs):
router = VRouter.create_instance(id)
# [(prefix, nexthop),(prefix, nexthop)]
if 'routes' in kwargs:
router.routes.extend(kwargs['routes'])
for k,v in kwargs.items():
if k != "routes":
setattr(router,k,v)
return router
async def updatevirtualrouter(self, id: str, **kwargs: {"?routes": [tuple_((cidr_nonstrict_type, ip_address_type))]}):
"""
Update virtual router
"""
if not id:
raise ValueError("must specify id")
router = {"id":id}
router.update(kwargs)
return await self.updatevirtualrouters([router])
@checked
async def updatevirtualrouters(self, routers: [{"id": str,
"?routes": [tuple_((cidr_nonstrict_type, ip_address_type))]}]):
"Update multiple virtual routers"
idset = set()
for router in routers:
if 'id' not in router:
raise ValueError("must specify id")
else:
if router['id'] in idset:
raise ValueError("Repeated ID: " + router['id'])
else:
idset.add(router['id'])
routerkeys = [VRouter.default_key(r['id']) for r in routers]
def updaterouter(keys,values):
for i in range(0,len(routers)):
if values[i]:
for k,v in routers[i].items():
if k == 'routes':
values[i].routes[:] = copy.deepcopy(v)
else:
setattr(values[i], k, v)
else:
raise ValueError("Virtual router not exists: " + routers[i]['id'])
return keys,values
await call_api(self.app_routine,'objectdb','transact',
{'keys':routerkeys,'updater':updaterouter})
return await self._dumpkeys(routerkeys)
async def deletevirtualrouter(self, id: str):
"Delete virtual router"
if not id:
raise ValueError("must specify id")
router = {"id":id}
return await self.deletevirtualrouters([router])
@checked
async def deletevirtualrouters(self, routers: [{"id": str}]):
"Delete multiple virtual routers"
idset = set()
for router in routers:
if 'id' not in router:
raise ValueError("must specify id")
else:
if router['id'] in idset:
raise ValueError("Repeated ID: " + router['id'])
else:
idset.add(router['id'])
routersetkey = [VRouterSet.default_key()]
routerkeys = [VRouter.default_key(v['id']) for v in routers]
def deletevrouter(keys,values):
routerset = values[0]
for i in range(0,len(routers)):
if values[i+1].interfaces.dataset():
raise ValueError("there are still interface(s) in this router, delete them first")
routerset.set.dataset().discard(values[i+1].create_weakreference())
return keys,[routerset] + [None] * len(routers)
await call_api(self.app_routine,"objectdb","transact",
{"keys":routersetkey + routerkeys,"updater":deletevrouter})
return {"status":"OK"}
async def listvirtualrouters(self, id: (str, None) = None, **kwargs):
"""
Query virtual router
:param id: if specified, only return virtual router with this ID
:param \*\*kwargs: customized filter
:return: a list of dictionaries each stands for a matched virtual router.
"""
if id:
return await self._dumpone(VRouter.default_key(id), kwargs)
else:
# we get all router from vrouterset index
routersetkey = VRouterSet.default_key()
self._reqid += 1
reqid = ("virtualrouter",self._reqid)
def set_walker(key,set,walk,save):
for weakobj in set.dataset():
routerkey = weakobj.getkey()
try:
router = walk(routerkey)
except KeyError:
pass
else:
if all(getattr(router,k,None) == v for k,v in kwargs.items()):
save(routerkey)
def walker_func(set_func):
def walker(key,obj,walk,save):
if obj is None:
return
set_walker(key,set_func(obj),walk,save)
return walker
with request_context(reqid, self.app_routine):
_, values = await call_api(self.app_routine,"objectdb","walk",
{"keys":[routersetkey],"walkerdict":{routersetkey:walker_func(lambda x:x.set)},
"requestid":reqid})
return [dump(r) for r in values]
async def addrouterinterface(self, router: str, subnet: str, id: (str, None) = None,
**kwargs: {'?ip_address': ip_address_type}):
"""
Connect virtual router to a subnet
:param router: virtual router ID
:param subnet: subnet ID
:param id: router port ID
:param \*\*kwargs: customized options
:return: A dictionary of information of the created router port
"""
if not id:
id = str(uuid1())
if not router:
raise ValueError("must specify virtual router ID")
if not subnet:
raise ValueError("must specify subnet ID")
interface = {"id":id,"router":router,"subnet":subnet}
interface.update(kwargs)
return await self.addrouterinterfaces([interface])
@checked
async def addrouterinterfaces(self, interfaces: [{"router": str,
"subnet": str,
"?id": str,
'?ip_address': ip_address_type}]):
"""
Create multiple router interfaces
"""
keys = set()
parameter_dict = OrderedDict()
for interface in interfaces:
interface = copy.deepcopy(interface)
if 'id' not in interface:
interface['id'] = str(uuid1())
key = RouterPort.default_key(interface['id'])
if key in parameter_dict:
raise ValueError("Repeated ID: "+interface['id'])
parameter_dict[key] = interface
keys.add(key)
keys.add(VRouter.default_key(interface['router']))
keys.add(SubNet.default_key(interface['subnet']))
keys.add(SubNetMap.default_key(interface['subnet']))
def walker(walk, write):
for key, parameters in parameter_dict.items():
with suppress(WalkKeyNotRetrieved):
value = walk(key)
value = create_new(RouterPort, value, parameters['id'])
subnet = walk(SubNet.default_key(parameters['subnet']))
if subnet is None:
raise ValueError("Subnet " + parameters['subnet'] + " not exists")
subnet_map = walk(SubNetMap.default_key(parameters['subnet']))
router = walk(VRouter.default_key(parameters['router']))
if router is None:
raise ValueError("Virtual router " + parameters['router'] + " not exists")
if hasattr(subnet, 'router'):
# normal subnet can only have one router
_, (rid,) = VRouter._getIndices(subnet.router.getkey())
raise ValueError("Subnet %r is already in virtual router %r", parameters['subnet'], rid)
if hasattr(subnet_map, 'routers'):
if router.create_weakreference() in subnet_map.routers.dataset():
raise ValueError("Subnet %r is already in virtual router %r", parameters['subnet'],
parameters['router'])
if 'ip_address' in parameters:
if getattr(subnet, 'isexternal', False):
raise ValueError("Cannot specify IP address when add external subnet to virtual router")
# Check IP address in CIDR
nip = parse_ip4_address(parameters['ip_address'])
cidr, prefix = parse_ip4_network(subnet.cidr)
if not ip_in_network(nip, cidr, prefix):
raise ValueError("IP address " + parameters['ip_address'] + " not in subnet CIDR")
# Check IP not allocated
if str(nip) in subnet_map.allocated_ips:
raise ValueError("IP address " + parameters['ip_address'] + " has been used")
else:
# Save to allocated map
subnet_map.allocated_ips[str(nip)] = (value.create_weakreference(), router.create_weakreference())
write(subnet_map.getkey(), subnet_map)
else:
# Use gateway
if not hasattr(subnet, 'gateway'):
raise ValueError("Subnet " + subnet.id + " does not have a gateway, IP address on router port must be specified explicitly")
if not hasattr(subnet_map, 'routers'):
subnet_map.routers = DataObjectSet()
subnet_map.routers.dataset().add(router.create_weakreference())
if not hasattr(subnet_map, 'routerports'):
subnet_map.routerports = {}
subnet_map.routerports[router.id] = value.create_weakreference()
write(subnet_map.getkey(), subnet_map)
if not getattr(subnet, 'isexternal', False):
subnet.router = value.create_weakreference()
write(subnet.getkey(), subnet)
# Save port to router
router.interfaces.dataset().add(value.create_weakreference())
write(router.getkey(), router)
value.router = router.create_reference()
value.subnet = subnet.create_reference()
for k, v in parameters.items():
if k not in ('router', 'subnet', 'id'):
setattr(value, k, v)
write(key, value)
await call_api(self.app_routine,'objectdb','writewalk',
{"keys":keys, 'walker':walker})
return await self._dumpkeys(parameter_dict)
async def removerouterinterface(self, router: str, subnet: str):
"""
Remote a subnet from the router
:param router: virtual router ID
:param subnet: subnet ID
:return: ``{"status": "OK"}``
"""
if not router:
raise ValueError("must specify router id")
if not subnet:
raise ValueError("must specify subnet id")
interface = {"router": router, "subnet": subnet}
await self.removerouterinterfaces([interface])
@checked
async def removerouterinterfaces(self, interfaces: [{"router": str,
"subnet": str}]):
"""
Remote multiple subnets from routers
"""
for interface in interfaces:
if 'router' not in interface:
raise ValueError("must specify router ID")
if "subnet" not in interface:
raise ValueError("must specify subnet ID")
keys = set()
keys.update(VRouter.default_key(interface['router']) for interface in interfaces)
keys.update(SubNet.default_key(interface['subnet']) for interface in interfaces)
keys.update(SubNetMap.default_key(interface['subnet']) for interface in interfaces)
def walker(walk, write):
for interface in interfaces:
with suppress(WalkKeyNotRetrieved):
router = walk(VRouter.default_key(interface['router']))
if router is None:
raise ValueError("Virtual router " + interface['router'] + " not exists")
subnet = walk(SubNet.default_key(interface['subnet']))
if subnet is None:
raise ValueError("Subnet " + interface['subnet'] + " not exists")
subnet_map = walk(SubNetMap.default_key(interface['subnet']))
if router.create_weakreference() not in subnet_map.routers.dataset():
raise ValueError("Subnet %r not in virtual router %r" % (subnet.id, router.id))
port = subnet_map.routerports.pop(router.id)
subnet_map.routers.dataset().discard(router.create_weakreference())
write(subnet_map.getkey(), subnet_map)
router.interfaces.dataset().discard(port)
write(router.getkey(), router)
if hasattr(subnet, 'router') and subnet.router == port:
delattr(subnet, 'router')
write(subnet.getkey(), subnet)
write(port.getkey(), None)
await call_api(self.app_routine,"objectdb","writewalk",{"keys": keys,
"walker": walker})
return {'status': 'OK'}
async def listrouterinterfaces(self, id: str, **kwargs):
"""
Query router ports from a virtual router
:param id: virtual router ID
:param \*\*kwargs: customized filters on router interfaces
:return: a list of dictionaries each stands for a matched router interface
"""
if not id:
raise ValueError("must specify router id")
routerkey = VRouter.default_key(id)
self._reqid += 1
reqid = ("virtualrouter", self._reqid)
def set_walker(key, interfaces, walk, save):
for weakobj in interfaces.dataset():
vpkey = weakobj.getkey()
try:
virtualport = walk(vpkey)
except KeyError:
pass
else:
if all(getattr(virtualport,k,None) == v for k,v in kwargs.items()):
save(vpkey)
def walk_func(filter_func):
def walker(key,obj,walk,save):
if obj is None:
return
set_walker(key,filter_func(obj),walk,save)
return walker
with request_context(reqid, self.app_routine):
_, values = await call_api(self.app_routine,"objectdb","walk",
{"keys":[routerkey],"walkerdict":{routerkey:walk_func(lambda x:x.interfaces)},
"requestid":reqid})
return [dump(r) for r in values]
async def load(self,container):
initkeys = [VRouterSet.default_key(),DVRouterForwardSet.default_key(),
DVRouterExternalAddressInfo.default_key()]
def init(keys,values):
if values[0] is None:
values[0] = VRouterSet()
if values[1] is None:
values[1] = DVRouterForwardSet()
if values[2] is None:
values[2] = DVRouterExternalAddressInfo()
return keys,values
await call_api(container,"objectdb","transact",
{"keys":initkeys,"updater":init})
await Module.load(self, container)