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rest_router.py
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rest_router.py
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# Copyright (C) 2013 Nippon Telegraph and Telephone Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import numbers
import socket
import struct
import json
from ryu.app.wsgi import ControllerBase
from ryu.app.wsgi import Response
from ryu.app.wsgi import WSGIApplication
from ryu.base import app_manager
from ryu.controller import dpset
from ryu.controller import ofp_event
from ryu.controller.handler import set_ev_cls
from ryu.controller.handler import MAIN_DISPATCHER
from ryu.exception import OFPUnknownVersion
from ryu.exception import RyuException
from ryu.lib import dpid as dpid_lib
from ryu.lib import hub
from ryu.lib import mac as mac_lib
from ryu.lib import addrconv
from ryu.lib.packet import arp
from ryu.lib.packet import ethernet
from ryu.lib.packet import icmp
from ryu.lib.packet import ipv4
from ryu.lib.packet import packet
from ryu.lib.packet import packet_base
from ryu.lib.packet import tcp
from ryu.lib.packet import udp
from ryu.lib.packet import vlan
from ryu.ofproto import ether
from ryu.ofproto import inet
from ryu.ofproto import ofproto_v1_0
from ryu.ofproto import ofproto_v1_2
from ryu.ofproto import ofproto_v1_3
# =============================
# REST API
# =============================
#
# Note: specify switch and vlan group, as follows.
# {switch_id} : 'all' or switchID
# {vlan_id} : 'all' or vlanID
#
# 1. get address data and routing data.
#
# * get data of no vlan
# GET /router/{switch_id}
#
# * get data of specific vlan group
# GET /router/{switch_id}/{vlan_id}
#
# 2. set address data or routing data.
#
# * set data of no vlan
# POST /router/{switch_id}
#
# * set data of specific vlan group
# POST /router/{switch_id}/{vlan_id}
#
# case1: set address data.
# parameter = {"address": "A.B.C.D/M"}
# case2-1: set static route.
# parameter = {"destination": "A.B.C.D/M", "gateway": "E.F.G.H"}
# case2-2: set default route.
# parameter = {"gateway": "E.F.G.H"}
#
# 3. delete address data or routing data.
#
# * delete data of no vlan
# DELETE /router/{switch_id}
#
# * delete data of specific vlan group
# DELETE /router/{switch_id}/{vlan_id}
#
# case1: delete address data.
# parameter = {"address_id": "<int>"} or {"address_id": "all"}
# case2: delete routing data.
# parameter = {"route_id": "<int>"} or {"route_id": "all"}
#
#
UINT16_MAX = 0xffff
UINT32_MAX = 0xffffffff
UINT64_MAX = 0xffffffffffffffff
ETHERNET = ethernet.ethernet.__name__
VLAN = vlan.vlan.__name__
IPV4 = ipv4.ipv4.__name__
ARP = arp.arp.__name__
ICMP = icmp.icmp.__name__
TCP = tcp.tcp.__name__
UDP = udp.udp.__name__
# MAX_SUSPENDPACKETS = 50 # Threshold of the packet suspends thread count.
# MAX_SUSPENDPACKETS = 250 # Threshold of the packet suspends thread count.
MAX_SUSPENDPACKETS = 2500 # Threshold of the packet suspends thread count.
# ARP_REPLY_TIMER = 2 # sec
ARP_REPLY_TIMER = 3 # sec
# OFP_REPLY_TIMER = 1.0 # sec
OFP_REPLY_TIMER = 2.0 # sec
CHK_ROUTING_TBL_INTERVAL = 1800 # sec
SWITCHID_PATTERN = dpid_lib.DPID_PATTERN + r'|all'
VLANID_PATTERN = r'[0-9]{1,4}|all'
VLANID_NONE = 0
VLANID_MIN = 2
VLANID_MAX = 4094
COOKIE_DEFAULT_ID = 0
COOKIE_SHIFT_VLANID = 32
COOKIE_SHIFT_ROUTEID = 16
DEFAULT_ROUTE = '0.0.0.0/0'
IDLE_TIMEOUT = 1800 # sec
DEFAULT_TTL = 64
REST_COMMAND_RESULT = 'command_result'
REST_RESULT = 'result'
REST_DETAILS = 'details'
REST_OK = 'success'
REST_NG = 'failure'
REST_ALL = 'all'
REST_SWITCHID = 'switch_id'
REST_VLANID = 'vlan_id'
REST_NW = 'internal_network'
REST_ADDRESSID = 'address_id'
REST_ADDRESS = 'address'
REST_ROUTEID = 'route_id'
REST_ROUTE = 'route'
REST_DESTINATION = 'destination'
REST_GATEWAY = 'gateway'
PRIORITY_VLAN_SHIFT = 1000
PRIORITY_NETMASK_SHIFT = 32
PRIORITY_NORMAL = 0
PRIORITY_ARP_HANDLING = 1
PRIORITY_DEFAULT_ROUTING = 1
PRIORITY_MAC_LEARNING = 2
PRIORITY_STATIC_ROUTING = 2
PRIORITY_IMPLICIT_ROUTING = 3
PRIORITY_L2_SWITCHING = 4
PRIORITY_IP_HANDLING = 5
PRIORITY_TYPE_ROUTE = 'priority_route'
def get_priority(priority_type, vid=0, route=None):
log_msg = None
priority = priority_type
if priority_type == PRIORITY_TYPE_ROUTE:
assert route is not None
if route.dst_ip:
priority_type = PRIORITY_STATIC_ROUTING
priority = priority_type + route.netmask
log_msg = 'static routing'
else:
priority_type = PRIORITY_DEFAULT_ROUTING
priority = priority_type
log_msg = 'default routing'
if vid or priority_type == PRIORITY_IP_HANDLING:
priority += PRIORITY_VLAN_SHIFT
if priority_type > PRIORITY_STATIC_ROUTING:
priority += PRIORITY_NETMASK_SHIFT
if log_msg is None:
return priority
else:
return priority, log_msg
def get_priority_type(priority, vid):
if vid:
priority -= PRIORITY_VLAN_SHIFT
return priority
class NotFoundError(RyuException):
message = 'Router SW is not connected. : switch_id=%(switch_id)s'
class CommandFailure(RyuException):
pass
class RestRouterAPI(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION,
ofproto_v1_2.OFP_VERSION,
ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {'dpset': dpset.DPSet,
'wsgi': WSGIApplication}
def __init__(self, *args, **kwargs):
super(RestRouterAPI, self).__init__(*args, **kwargs)
# logger configure
RouterController.set_logger(self.logger)
wsgi = kwargs['wsgi']
self.waiters = {}
self.data = {'waiters': self.waiters}
mapper = wsgi.mapper
wsgi.registory['RouterController'] = self.data
requirements = {'switch_id': SWITCHID_PATTERN,
'vlan_id': VLANID_PATTERN}
# For no vlan data
path = '/router/{switch_id}'
mapper.connect('router', path, controller=RouterController,
requirements=requirements,
action='get_data',
conditions=dict(method=['GET']))
mapper.connect('router', path, controller=RouterController,
requirements=requirements,
action='set_data',
conditions=dict(method=['POST']))
mapper.connect('router', path, controller=RouterController,
requirements=requirements,
action='delete_data',
conditions=dict(method=['DELETE']))
# For vlan data
path = '/router/{switch_id}/{vlan_id}'
mapper.connect('router', path, controller=RouterController,
requirements=requirements,
action='get_vlan_data',
conditions=dict(method=['GET']))
mapper.connect('router', path, controller=RouterController,
requirements=requirements,
action='set_vlan_data',
conditions=dict(method=['POST']))
mapper.connect('router', path, controller=RouterController,
requirements=requirements,
action='delete_vlan_data',
conditions=dict(method=['DELETE']))
@set_ev_cls(dpset.EventDP, dpset.DPSET_EV_DISPATCHER)
def datapath_handler(self, ev):
if ev.enter == True and (ev.dp.id == 2 or ev.dp.id == 3):
RouterController.register_router(ev.dp)
else:
RouterController.unregister_router(ev.dp)
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def packet_in_handler(self, ev):
RouterController.packet_in_handler(ev.msg)
def _stats_reply_handler(self, ev):
msg = ev.msg
dp = msg.datapath
if (dp.id not in self.waiters
or msg.xid not in self.waiters[dp.id]):
return
event, msgs = self.waiters[dp.id][msg.xid]
msgs.append(msg)
if ofproto_v1_3.OFP_VERSION == dp.ofproto.OFP_VERSION:
more = dp.ofproto.OFPMPF_REPLY_MORE
else:
more = dp.ofproto.OFPSF_REPLY_MORE
if msg.flags & more:
return
del self.waiters[dp.id][msg.xid]
event.set()
# for OpenFlow version1.0
@set_ev_cls(ofp_event.EventOFPFlowStatsReply, MAIN_DISPATCHER)
def stats_reply_handler_v1_0(self, ev):
self._stats_reply_handler(ev)
# for OpenFlow version1.2/1.3
@set_ev_cls(ofp_event.EventOFPStatsReply, MAIN_DISPATCHER)
def stats_reply_handler_v1_2(self, ev):
self._stats_reply_handler(ev)
# TODO: Update routing table when port status is changed.
# REST command template
def rest_command(func):
def _rest_command(*args, **kwargs):
try:
msg = func(*args, **kwargs)
return Response(content_type='application/json',
body=json.dumps(msg, indent=2, sort_keys=True))
except SyntaxError as e:
status = 400
details = e.msg
except (ValueError, NameError) as e:
status = 400
details = e.message
except NotFoundError as msg:
status = 404
details = str(msg)
msg = {REST_RESULT: REST_NG,
REST_DETAILS: details}
return Response(status=status, body=json.dumps(msg, indent=2, sort_keys=True))
return _rest_command
class RouterController(ControllerBase):
_ROUTER_LIST = {}
_LOGGER = None
def __init__(self, req, link, data, **config):
super(RouterController, self).__init__(req, link, data, **config)
self.waiters = data['waiters']
@classmethod
def set_logger(cls, logger):
cls._LOGGER = logger
cls._LOGGER.propagate = False
hdlr = logging.StreamHandler()
# hdlr = logging.StreamHandler(sys.stdout)
fmt_str = '[%(asctime)s.%(msecs)06d] [RT]%(levelname)s switch_id=%(sw_id)s: %(message)s'
hdlr.setFormatter(logging.Formatter(fmt_str, '%Y-%m-%d %H:%M:%S'))
cls._LOGGER.addHandler(hdlr)
@classmethod
def register_router(cls, dp):
dpid = {'sw_id': dpid_lib.dpid_to_str(dp.id)}
try:
router = Router(dp, cls._LOGGER)
except OFPUnknownVersion as message:
cls._LOGGER.error(str(message), extra=dpid)
return
cls._ROUTER_LIST.setdefault(dp.id, router)
cls._LOGGER.info('Join as router.', extra=dpid)
@classmethod
def unregister_router(cls, dp):
if dp.id in cls._ROUTER_LIST:
cls._ROUTER_LIST[dp.id].delete()
del cls._ROUTER_LIST[dp.id]
dpid = {'sw_id': dpid_lib.dpid_to_str(dp.id)}
cls._LOGGER.info('Leave router.', extra=dpid)
@classmethod
def packet_in_handler(cls, msg):
dp_id = msg.datapath.id
if dp_id in cls._ROUTER_LIST:
router = cls._ROUTER_LIST[dp_id]
router.packet_in_handler(msg)
# GET /router/{switch_id}
@rest_command
def get_data(self, req, switch_id, **_kwargs):
return self._access_router(switch_id, VLANID_NONE,
'get_data', req)
# GET /router/{switch_id}/{vlan_id}
@rest_command
def get_vlan_data(self, req, switch_id, vlan_id, **_kwargs):
return self._access_router(switch_id, vlan_id,
'get_data', req)
# POST /router/{switch_id}
@rest_command
def set_data(self, req, switch_id, **_kwargs):
return self._access_router(switch_id, VLANID_NONE,
'set_data', req)
# POST /router/{switch_id}/{vlan_id}
@rest_command
def set_vlan_data(self, req, switch_id, vlan_id, **_kwargs):
return self._access_router(switch_id, vlan_id,
'set_data', req)
# DELETE /router/{switch_id}
@rest_command
def delete_data(self, req, switch_id, **_kwargs):
return self._access_router(switch_id, VLANID_NONE,
'delete_data', req)
# DELETE /router/{switch_id}/{vlan_id}
@rest_command
def delete_vlan_data(self, req, switch_id, vlan_id, **_kwargs):
return self._access_router(switch_id, vlan_id,
'delete_data', req)
def _access_router(self, switch_id, vlan_id, func, req):
rest_message = []
routers = self._get_router(switch_id)
try:
param = req.json if req.body else {}
except ValueError:
raise SyntaxError('invalid syntax %s', req.body)
for router in routers.values():
function = getattr(router, func)
data = function(vlan_id, param, self.waiters)
rest_message.append(data)
return rest_message
def _get_router(self, switch_id):
routers = {}
if switch_id == REST_ALL:
routers = self._ROUTER_LIST
else:
sw_id = dpid_lib.str_to_dpid(switch_id)
if sw_id in self._ROUTER_LIST:
routers = {sw_id: self._ROUTER_LIST[sw_id]}
if routers:
return routers
else:
raise NotFoundError(switch_id=switch_id)
class Router(dict):
def __init__(self, dp, logger):
super(Router, self).__init__()
self.dp = dp
self.dpid_str = dpid_lib.dpid_to_str(dp.id)
self.sw_id = {'sw_id': self.dpid_str}
self.logger = logger
self.port_data = PortData(dp.ports)
ofctl = OfCtl.factory(dp, logger)
cookie = COOKIE_DEFAULT_ID
# Set SW config: TTL error packet in (for OFPv1.2/1.3)
ofctl.set_sw_config_for_ttl()
# Set flow: ARP handling (packet in)
priority = get_priority(PRIORITY_ARP_HANDLING)
ofctl.set_packetin_flow(cookie, priority, dl_type=ether.ETH_TYPE_ARP)
self.logger.info('Set ARP handling (packet in) flow [cookie=0x%x]',
cookie, extra=self.sw_id)
# Set flow: L2 switching (normal)
priority = get_priority(PRIORITY_NORMAL)
ofctl.set_normal_flow(cookie, priority)
self.logger.info('Set L2 switching (normal) flow [cookie=0x%x]',
cookie, extra=self.sw_id)
# Set VlanRouter for vid=None.
vlan_router = VlanRouter(VLANID_NONE, dp, self.port_data, logger)
self[VLANID_NONE] = vlan_router
# Start cyclic routing table check.
self.thread = hub.spawn(self._cyclic_update_routing_tbl)
self.logger.info('Start cyclic routing table update.',
extra=self.sw_id)
def delete(self):
hub.kill(self.thread)
self.thread.wait()
self.logger.info('Stop cyclic routing table update.',
extra=self.sw_id)
def _get_vlan_router(self, vlan_id):
vlan_routers = []
if vlan_id == REST_ALL:
vlan_routers = list(self.values())
else:
vlan_id = int(vlan_id)
if (vlan_id != VLANID_NONE and
(vlan_id < VLANID_MIN or VLANID_MAX < vlan_id)):
msg = 'Invalid {vlan_id} value. Set [%d-%d]'
raise ValueError(msg % (VLANID_MIN, VLANID_MAX))
elif vlan_id in self:
vlan_routers = [self[vlan_id]]
return vlan_routers
def _add_vlan_router(self, vlan_id):
vlan_id = int(vlan_id)
if vlan_id not in self:
vlan_router = VlanRouter(vlan_id, self.dp, self.port_data,
self.logger)
self[vlan_id] = vlan_router
return self[vlan_id]
def _del_vlan_router(self, vlan_id, waiters):
# Remove unnecessary VlanRouter.
if vlan_id == VLANID_NONE:
return
vlan_router = self[vlan_id]
if (len(vlan_router.address_data) == 0
and len(vlan_router.routing_tbl) == 0):
vlan_router.delete(waiters)
del self[vlan_id]
def get_data(self, vlan_id, dummy1, dummy2):
vlan_routers = self._get_vlan_router(vlan_id)
if vlan_routers:
msgs = [vlan_router.get_data() for vlan_router in vlan_routers]
else:
msgs = [{REST_VLANID: vlan_id}]
return {REST_SWITCHID: self.dpid_str,
REST_NW: msgs}
def set_data(self, vlan_id, param, waiters):
vlan_routers = self._get_vlan_router(vlan_id)
if not vlan_routers:
vlan_routers = [self._add_vlan_router(vlan_id)]
msgs = []
for vlan_router in vlan_routers:
try:
msg = vlan_router.set_data(param)
msgs.append(msg)
if msg[REST_RESULT] == REST_NG:
# Data setting is failure.
self._del_vlan_router(vlan_router.vlan_id, waiters)
except ValueError as err_msg:
# Data setting is failure.
self._del_vlan_router(vlan_router.vlan_id, waiters)
raise err_msg
return {REST_SWITCHID: self.dpid_str,
REST_COMMAND_RESULT: msgs}
def delete_data(self, vlan_id, param, waiters):
msgs = []
vlan_routers = self._get_vlan_router(vlan_id)
if vlan_routers:
for vlan_router in vlan_routers:
msg = vlan_router.delete_data(param, waiters)
if msg:
msgs.append(msg)
# Check unnecessary VlanRouter.
self._del_vlan_router(vlan_router.vlan_id, waiters)
if not msgs:
msgs = [{REST_RESULT: REST_NG,
REST_DETAILS: 'Data is nothing.'}]
return {REST_SWITCHID: self.dpid_str,
REST_COMMAND_RESULT: msgs}
def packet_in_handler(self, msg):
pkt = packet.Packet(msg.data)
# TODO: Packet library convert to string
# self.logger.debug('Packet in = %s', str(pkt), self.sw_id)
header_list = dict((p.protocol_name, p)
for p in pkt.protocols
if isinstance(p, packet_base.PacketBase))
if header_list:
# Check vlan-tag
vlan_id = VLANID_NONE
if VLAN in header_list:
vlan_id = header_list[VLAN].vid
# Event dispatch
if vlan_id in self:
self[vlan_id].packet_in_handler(msg, header_list)
else:
self.logger.debug('Drop unknown vlan packet. [vlan_id=%d]',
vlan_id, extra=self.sw_id)
def _cyclic_update_routing_tbl(self):
while True:
# send ARP to all gateways.
for vlan_router in self.values():
vlan_router.send_arp_all_gw()
hub.sleep(1)
hub.sleep(CHK_ROUTING_TBL_INTERVAL)
class VlanRouter(object):
def __init__(self, vlan_id, dp, port_data, logger):
super(VlanRouter, self).__init__()
self.vlan_id = vlan_id
self.dp = dp
self.sw_id = {'sw_id': dpid_lib.dpid_to_str(dp.id)}
self.logger = logger
self.port_data = port_data
self.address_data = AddressData()
self.routing_tbl = RoutingTable()
self.packet_buffer = SuspendPacketList(self.send_icmp_unreach_error)
self.ofctl = OfCtl.factory(dp, logger)
# Set flow: default route (drop)
self._set_defaultroute_drop()
def delete(self, waiters):
# Delete flow.
msgs = self.ofctl.get_all_flow(waiters)
for msg in msgs:
for stats in msg.body:
vlan_id = VlanRouter._cookie_to_id(REST_VLANID, stats.cookie)
if vlan_id == self.vlan_id:
self.ofctl.delete_flow(stats)
assert len(self.packet_buffer) == 0
@staticmethod
def _cookie_to_id(id_type, cookie):
if id_type == REST_VLANID:
rest_id = cookie >> COOKIE_SHIFT_VLANID
elif id_type == REST_ADDRESSID:
rest_id = cookie & UINT32_MAX
else:
assert id_type == REST_ROUTEID
rest_id = (cookie & UINT32_MAX) >> COOKIE_SHIFT_ROUTEID
return rest_id
def _id_to_cookie(self, id_type, rest_id):
vid = self.vlan_id << COOKIE_SHIFT_VLANID
if id_type == REST_VLANID:
cookie = rest_id << COOKIE_SHIFT_VLANID
elif id_type == REST_ADDRESSID:
cookie = vid + rest_id
else:
assert id_type == REST_ROUTEID
cookie = vid + (rest_id << COOKIE_SHIFT_ROUTEID)
return cookie
def _get_priority(self, priority_type, route=None):
return get_priority(priority_type, vid=self.vlan_id, route=route)
def _response(self, msg):
if msg and self.vlan_id:
msg.setdefault(REST_VLANID, self.vlan_id)
return msg
def get_data(self):
address_data = self._get_address_data()
routing_data = self._get_routing_data()
data = {}
if address_data[REST_ADDRESS]:
data.update(address_data)
if routing_data[REST_ROUTE]:
data.update(routing_data)
return self._response(data)
def _get_address_data(self):
address_data = []
for value in self.address_data.values():
default_gw = ip_addr_ntoa(value.default_gw)
address = '%s/%d' % (default_gw, value.netmask)
data = {REST_ADDRESSID: value.address_id,
REST_ADDRESS: address}
address_data.append(data)
return {REST_ADDRESS: address_data}
def _get_routing_data(self):
routing_data = []
for key, value in self.routing_tbl.items():
if value.gateway_mac is not None:
gateway = ip_addr_ntoa(value.gateway_ip)
data = {REST_ROUTEID: value.route_id,
REST_DESTINATION: key,
REST_GATEWAY: gateway}
routing_data.append(data)
return {REST_ROUTE: routing_data}
def set_data(self, data):
details = None
try:
# Set address data
if REST_ADDRESS in data:
address = data[REST_ADDRESS]
address_id = self._set_address_data(address)
details = 'Add address [address_id=%d]' % address_id
# Set routing data
elif REST_GATEWAY in data:
gateway = data[REST_GATEWAY]
if REST_DESTINATION in data:
destination = data[REST_DESTINATION]
else:
destination = DEFAULT_ROUTE
route_id = self._set_routing_data(destination, gateway)
details = 'Add route [route_id=%d]' % route_id
except CommandFailure as err_msg:
msg = {REST_RESULT: REST_NG, REST_DETAILS: str(err_msg)}
return self._response(msg)
if details is not None:
msg = {REST_RESULT: REST_OK, REST_DETAILS: details}
return self._response(msg)
else:
raise ValueError('Invalid parameter.')
def _set_address_data(self, address):
address = self.address_data.add(address)
cookie = self._id_to_cookie(REST_ADDRESSID, address.address_id)
# Set flow: host MAC learning (packet in)
priority = self._get_priority(PRIORITY_MAC_LEARNING)
self.ofctl.set_packetin_flow(cookie, priority,
dl_type=ether.ETH_TYPE_IP,
dl_vlan=self.vlan_id,
dst_ip=address.nw_addr,
dst_mask=address.netmask)
log_msg = 'Set host MAC learning (packet in) flow [cookie=0x%x]'
self.logger.info(log_msg, cookie, extra=self.sw_id)
# set Flow: IP handling(PacketIn)
priority = self._get_priority(PRIORITY_IP_HANDLING)
self.ofctl.set_packetin_flow(cookie, priority,
dl_type=ether.ETH_TYPE_IP,
dl_vlan=self.vlan_id,
dst_ip=address.default_gw)
self.logger.info('Set IP handling (packet in) flow [cookie=0x%x]',
cookie, extra=self.sw_id)
# Set flow: L2 switching (normal)
outport = self.ofctl.dp.ofproto.OFPP_NORMAL
priority = self._get_priority(PRIORITY_L2_SWITCHING)
self.ofctl.set_routing_flow(
cookie, priority, outport, dl_vlan=self.vlan_id,
nw_src=address.nw_addr, src_mask=address.netmask,
nw_dst=address.nw_addr, dst_mask=address.netmask)
self.logger.info('Set L2 switching (normal) flow [cookie=0x%x]',
cookie, extra=self.sw_id)
# Send GARP
self.send_arp_request(address.default_gw, address.default_gw)
return address.address_id
def _set_routing_data(self, destination, gateway):
err_msg = 'Invalid [%s] value.' % REST_GATEWAY
dst_ip = ip_addr_aton(gateway, err_msg=err_msg)
address = self.address_data.get_data(ip=dst_ip)
if address is None:
msg = 'Gateway=%s\'s address is not registered.' % gateway
raise CommandFailure(msg=msg)
elif dst_ip == address.default_gw:
msg = 'Gateway=%s is used as default gateway of address_id=%d'\
% (gateway, address.address_id)
raise CommandFailure(msg=msg)
else:
src_ip = address.default_gw
route = self.routing_tbl.add(destination, gateway)
self._set_route_packetin(route)
self.send_arp_request(src_ip, dst_ip)
return route.route_id
def _set_defaultroute_drop(self):
cookie = self._id_to_cookie(REST_VLANID, self.vlan_id)
priority = self._get_priority(PRIORITY_DEFAULT_ROUTING)
outport = None # for drop
self.ofctl.set_routing_flow(cookie, priority, outport,
dl_vlan=self.vlan_id)
self.logger.info('Set default route (drop) flow [cookie=0x%x]',
cookie, extra=self.sw_id)
def _set_route_packetin(self, route):
cookie = self._id_to_cookie(REST_ROUTEID, route.route_id)
priority, log_msg = self._get_priority(PRIORITY_TYPE_ROUTE,
route=route)
self.ofctl.set_packetin_flow(cookie, priority,
dl_type=ether.ETH_TYPE_IP,
dl_vlan=self.vlan_id,
dst_ip=route.dst_ip,
dst_mask=route.netmask)
self.logger.info('Set %s (packet in) flow [cookie=0x%x]', log_msg,
cookie, extra=self.sw_id)
def delete_data(self, data, waiters):
if REST_ROUTEID in data:
route_id = data[REST_ROUTEID]
msg = self._delete_routing_data(route_id, waiters)
elif REST_ADDRESSID in data:
address_id = data[REST_ADDRESSID]
msg = self._delete_address_data(address_id, waiters)
else:
raise ValueError('Invalid parameter.')
return self._response(msg)
def _delete_address_data(self, address_id, waiters):
if address_id != REST_ALL:
try:
address_id = int(address_id)
except ValueError as e:
err_msg = 'Invalid [%s] value. %s'
raise ValueError(err_msg % (REST_ADDRESSID, e.message))
skip_ids = self._chk_addr_relation_route(address_id)
# Get all flow.
delete_list = []
msgs = self.ofctl.get_all_flow(waiters)
max_id = UINT16_MAX
for msg in msgs:
for stats in msg.body:
vlan_id = VlanRouter._cookie_to_id(REST_VLANID, stats.cookie)
if vlan_id != self.vlan_id:
continue
addr_id = VlanRouter._cookie_to_id(REST_ADDRESSID,
stats.cookie)
if addr_id in skip_ids:
continue
elif address_id == REST_ALL:
if addr_id <= COOKIE_DEFAULT_ID or max_id < addr_id:
continue
elif address_id != addr_id:
continue
delete_list.append(stats)
delete_ids = []
for flow_stats in delete_list:
# Delete flow
self.ofctl.delete_flow(flow_stats)
address_id = VlanRouter._cookie_to_id(REST_ADDRESSID,
flow_stats.cookie)
del_address = self.address_data.get_data(addr_id=address_id)
if del_address is not None:
# Clean up suspend packet threads.
self.packet_buffer.delete(del_addr=del_address)
# Delete data.
self.address_data.delete(address_id)
if address_id not in delete_ids:
delete_ids.append(address_id)
msg = {}
if delete_ids:
delete_ids = ','.join(str(addr_id) for addr_id in delete_ids)
details = 'Delete address [address_id=%s]' % delete_ids
msg = {REST_RESULT: REST_OK, REST_DETAILS: details}
if skip_ids:
skip_ids = ','.join(str(addr_id) for addr_id in skip_ids)
details = 'Skip delete (related route exist) [address_id=%s]'\
% skip_ids
if msg:
msg[REST_DETAILS] += ', %s' % details
else:
msg = {REST_RESULT: REST_NG, REST_DETAILS: details}
return msg
def _delete_routing_data(self, route_id, waiters):
if route_id != REST_ALL:
try:
route_id = int(route_id)
except ValueError as e:
err_msg = 'Invalid [%s] value. %s'
raise ValueError(err_msg % (REST_ROUTEID, e.message))
# Get all flow.
msgs = self.ofctl.get_all_flow(waiters)
delete_list = []
for msg in msgs:
for stats in msg.body:
vlan_id = VlanRouter._cookie_to_id(REST_VLANID, stats.cookie)
if vlan_id != self.vlan_id:
continue
rt_id = VlanRouter._cookie_to_id(REST_ROUTEID, stats.cookie)
if route_id == REST_ALL:
if rt_id == COOKIE_DEFAULT_ID:
continue
elif route_id != rt_id:
continue
delete_list.append(stats)
# Delete flow.
delete_ids = []
for flow_stats in delete_list:
self.ofctl.delete_flow(flow_stats)
route_id = VlanRouter._cookie_to_id(REST_ROUTEID,
flow_stats.cookie)
self.routing_tbl.delete(route_id)
if route_id not in delete_ids:
delete_ids.append(route_id)
# case: Default route deleted. -> set flow (drop)
route_type = get_priority_type(flow_stats.priority,
vid=self.vlan_id)
if route_type == PRIORITY_DEFAULT_ROUTING:
self._set_defaultroute_drop()
msg = {}
if delete_ids:
delete_ids = ','.join(str(route_id) for route_id in delete_ids)
details = 'Delete route [route_id=%s]' % delete_ids
msg = {REST_RESULT: REST_OK, REST_DETAILS: details}
return msg
def _chk_addr_relation_route(self, address_id):
# Check exist of related routing data.
relate_list = []
gateways = self.routing_tbl.get_gateways()
for gateway in gateways:
address = self.address_data.get_data(ip=gateway)
if address is not None:
if (address_id == REST_ALL
and address.address_id not in relate_list):
relate_list.append(address.address_id)
elif address.address_id == address_id:
relate_list = [address_id]
break
return relate_list
def packet_in_handler(self, msg, header_list):
# Check invalid TTL (for OpenFlow V1.2/1.3)
ofproto = self.dp.ofproto
if ofproto.OFP_VERSION == ofproto_v1_2.OFP_VERSION or \
ofproto.OFP_VERSION == ofproto_v1_3.OFP_VERSION:
if msg.reason == ofproto.OFPR_INVALID_TTL:
self._packetin_invalid_ttl(msg, header_list)
return
# Analyze event type.
if ARP in header_list:
self._packetin_arp(msg, header_list)
return
if IPV4 in header_list:
rt_ports = self.address_data.get_default_gw()
if header_list[IPV4].dst in rt_ports:
# Packet to router's port.
if ICMP in header_list:
if header_list[ICMP].type == icmp.ICMP_ECHO_REQUEST:
self._packetin_icmp_req(msg, header_list)
return
elif TCP in header_list or UDP in header_list:
self._packetin_tcp_udp(msg, header_list)
return
else:
# Packet to internal host or gateway router.
self._packetin_to_node(msg, header_list)
return
def _packetin_arp(self, msg, header_list):
src_addr = self.address_data.get_data(ip=header_list[ARP].src_ip)
if src_addr is None:
return
# case: Receive ARP from the gateway
# Update routing table.
# case: Receive ARP from an internal host
# Learning host MAC.
gw_flg = self._update_routing_tbl(msg, header_list)
if gw_flg is False:
self._learning_host_mac(msg, header_list)
# ARP packet handling.
in_port = self.ofctl.get_packetin_inport(msg)
src_ip = header_list[ARP].src_ip
dst_ip = header_list[ARP].dst_ip
srcip = ip_addr_ntoa(src_ip)
dstip = ip_addr_ntoa(dst_ip)
rt_ports = self.address_data.get_default_gw()
if src_ip == dst_ip:
# GARP -> packet forward (normal)
output = self.ofctl.dp.ofproto.OFPP_NORMAL
self.ofctl.send_packet_out(in_port, output, msg.data)