def ryu(routerid, asn, peerip, peerport, peeras):
import eventlet
from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker
eventlet.monkey_patch() # BGPSpeaker needs sockets patched
def dump_remote_best_path_change(event):
print('the best path changed:', event.remote_as, event.prefix,
event.nexthop, event.is_withdraw)
def detect_peer_down(remote_ip, remote_as):
print('Peer down:', remote_ip, remote_as)
speaker = BGPSpeaker(
as_number=int(args.asn),
router_id=args.router_id,
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
# XXX need to fix port arg
speaker.neighbor_add(peerip, peeras, peerport)
# uncomment the below line if the speaker needs to talk with a bmp server.
# speaker.bmp_server_add('192.168.177.2', 11019)
# count = 1
while True:
eventlet.sleep(30)
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager()
self.waiters = {}
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number,
str(self.cfg_mgr.router_id),
bgp_server_port=self.cfg_mgr.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
speaker_ids = self.cfg_mgr.get_all_speaker_id()
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
hub.spawn(self.prefix_check_loop)
if with_dk:
dk_plugin.DynamicLoader.register_custom_cmd(
'sdn-ip:info', self.cmd_self_info)
dk_plugin.DynamicLoader.register_custom_cmd(
'sdn-ip:routes', self.cmd_list_routes)
dk_plugin.DynamicLoader.register_custom_cmd(
'sdn-ip:flows', self.cmd_get_flows)
def start_bgpspeaker(self, asNum, routerId, label_start, label_end):
self.myRouterId = routerId
self.labelRange = tuple([label_start, label_end])
self.speaker = BGPSpeaker(as_number=asNum, router_id=routerId,
best_path_change_handler=self.dump_remote_best_path_change,
peer_down_handler=self.detect_peer_down,
peer_up_handler=self.detect_peer_up,
label_range=self.labelRange)
def main():
reset_flows()
sw=discover_switches()
resolve_nhops()
print "start BGP peering"
speaker = BGPSpeaker(**self)
speaker.neighbor_add(**neighbor)
while True:
eventlet.sleep(10)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Set event notify handlers if no corresponding handler specified.
bgp_settings['best_path_change_handler'] = settings.get(
'best_path_change_handler', self._notify_best_path_changed_event)
bgp_settings['peer_down_handler'] = settings.get(
'peer_down_handler', self._notify_peer_down_event)
bgp_settings['peer_up_handler'] = settings.get(
'peer_up_handler', self._notify_peer_up_event)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(
BGP_SERVER_PORT, DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(
LABEL_RANGE, DEFAULT_LABEL_RANGE)
bgp_settings['allow_local_as_in_count'] = settings.get(
'allow_local_as_in_count', 0)
bgp_settings[LOCAL_PREF] = settings.get(
LOCAL_PREF, DEFAULT_LOCAL_PREF)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def reset_bgp(self):
# TODO: port status changes should cause us to withdraw a route.
# TODO: configurable behavior - withdraw routes if peer goes down.
for dp_id, valve in self.valves.iteritems():
if dp_id not in self.dp_bgp_speakers:
self.dp_bgp_speakers[dp_id] = {}
bgp_speakers = self.dp_bgp_speakers[dp_id]
for bgp_speaker in bgp_speakers.itervalues():
bgp_speaker.shutdown()
for vlan in valve.dp.vlans.itervalues():
if vlan.bgp_as:
handler = lambda x: self.bgp_route_handler(x, vlan)
bgp_speaker = BGPSpeaker(
as_number=vlan.bgp_as,
router_id=vlan.bgp_routerid,
bgp_server_port=vlan.bgp_port,
best_path_change_handler=handler)
for controller_ip in vlan.controller_ips:
prefix = ipaddr.IPNetwork(
'/'.join(
(str(controller_ip.ip),
str(controller_ip.prefixlen))))
bgp_speaker.prefix_add(
prefix=str(prefix),
next_hop=controller_ip.ip)
for route_table in (vlan.ipv4_routes, vlan.ipv6_routes):
for ip_dst, ip_gw in route_table.iteritems():
bgp_speaker.prefix_add(
prefix=str(ip_dst),
next_hop=str(ip_gw))
bgp_speaker.neighbor_add(
address=vlan.bgp_neighbor_address,
remote_as=vlan.bgp_neighbor_as)
bgp_speakers[vlan] = bgp_speaker
def _create_bgp_speaker_for_vlan(self, vlan):
"""Set up BGP speaker for an individual VLAN if required.
Args:
vlan (vlan): VLAN associated with this speaker.
Returns:
ryu.services.protocols.bgp.bgpspeaker.BGPSpeaker: BGP speaker.
"""
handler = lambda x: self._bgp_route_handler(x, vlan)
bgp_speaker = BGPSpeaker(as_number=vlan.bgp_as,
router_id=vlan.bgp_routerid,
bgp_server_port=vlan.bgp_port,
best_path_change_handler=handler)
for faucet_vip in vlan.faucet_vips:
prefix = ipaddr.IPNetwork(faucet_vip.exploded)
bgp_speaker.prefix_add(prefix=str(prefix),
next_hop=str(faucet_vip.ip))
for route_table in (vlan.ipv4_routes, vlan.ipv6_routes):
for ip_dst, ip_gw in route_table.iteritems():
bgp_speaker.prefix_add(prefix=str(ip_dst), next_hop=str(ip_gw))
for bgp_neighbor_address in vlan.bgp_neighbor_addresses:
bgp_speaker.neighbor_add(address=bgp_neighbor_address,
remote_as=vlan.bgp_neighbor_as,
local_address=vlan.bgp_local_address,
enable_ipv4=True,
enable_ipv6=True)
return bgp_speaker
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager()
self.waiters = {}
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number,
str(self.cfg_mgr.router_id),
bgp_server_port=self.cfg_mgr.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
speaker_ids = self.cfg_mgr.get_all_speaker_id()
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
hub.spawn(self.prefix_check_loop)
if with_dk:
dk_plugin.DynamicLoader.register_custom_cmd('sdn-ip:info', self.cmd_self_info)
dk_plugin.DynamicLoader.register_custom_cmd('sdn-ip:routes', self.cmd_list_routes)
dk_plugin.DynamicLoader.register_custom_cmd('sdn-ip:flows', self.cmd_get_flows)
def _create_bgp_speaker_for_vlan(self, vlan):
"""Set up BGP speaker for an individual VLAN if required.
Args:
vlan (vlan): VLAN associated with this speaker.
Returns:
ryu.services.protocols.bgp.bgpspeaker.BGPSpeaker: BGP speaker.
"""
handler = lambda x: self._bgp_route_handler(x, vlan)
bgp_speaker = BGPSpeaker(
as_number=vlan.bgp_as,
router_id=vlan.bgp_routerid,
bgp_server_port=vlan.bgp_port,
best_path_change_handler=handler)
for controller_ip in vlan.controller_ips:
prefix = ipaddr.IPNetwork(
'/'.join((str(controller_ip.ip), str(controller_ip.prefixlen))))
bgp_speaker.prefix_add(
prefix=str(prefix), next_hop=controller_ip.ip)
for route_table in (vlan.ipv4_routes, vlan.ipv6_routes):
for ip_dst, ip_gw in route_table.iteritems():
bgp_speaker.prefix_add(
prefix=str(ip_dst), next_hop=str(ip_gw))
for bgp_neighbor_address in vlan.bgp_neighbor_addresses:
bgp_speaker.neighbor_add(
address=bgp_neighbor_address,
remote_as=vlan.bgp_neighbor_as)
return bgp_speaker
def reset_bgp(self):
# TODO: port status changes should cause us to withdraw a route.
# TODO: configurable behavior - withdraw routes if peer goes down.
for bgp_speaker in self.bgp_speakers.itervalues():
bgp_speaker.shutdown()
for vlan in self.valve.dp.vlans.itervalues():
if vlan.bgp_as:
handler = lambda x: self.bgp_route_handler(x, vlan)
bgp_speaker = BGPSpeaker(
as_number=vlan.bgp_as,
router_id=vlan.bgp_routerid,
bgp_server_port=vlan.bgp_port,
best_path_change_handler=handler)
for controller_ip in vlan.controller_ips:
prefix = ipaddr.IPNetwork(
'/'.join(
(str(controller_ip.ip),
str(controller_ip.prefixlen))))
bgp_speaker.prefix_add(
prefix=str(prefix),
next_hop=controller_ip.ip)
for route_table in (vlan.ipv4_routes, vlan.ipv6_routes):
for ip_dst, ip_gw in route_table.iteritems():
bgp_speaker.prefix_add(
prefix=str(ip_dst),
next_hop=str(ip_gw))
bgp_speaker.neighbor_add(
address=vlan.bgp_neighbor_address,
remote_as=vlan.bgp_neighbor_as)
self.bgp_speakers[vlan] = bgp_speaker
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Check required settings.
_required_settings = (
LOCAL_AS,
ROUTER_ID,
)
for required in _required_settings:
if required not in settings:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % required)
# Set event notify handlers if no corresponding handler specified.
settings.setdefault(
'best_path_change_handler', self._notify_best_path_changed_event)
settings.setdefault(
'adj_rib_in_change_handler', self._notify_adj_rib_in_changed_event)
settings.setdefault(
'peer_down_handler', self._notify_peer_down_event)
settings.setdefault(
'peer_up_handler', self._notify_peer_up_event)
# Pop settings other than creating BGPSpeaker instance.
neighbors_settings = settings.pop('neighbors', [])
vrfs_settings = settings.pop('vrfs', [])
routes_settings = settings.pop('routes', [])
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
settings.setdefault('as_number', settings.pop(LOCAL_AS))
self.speaker = BGPSpeaker(**settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(neighbors_settings)
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(vrfs_settings)
# Add routes
LOG.debug('Adding routes...')
self._add_routes(routes_settings)
def bgp_sender(self):
def dump_remote_best_path_change(event):
print 'the best path changed:', event.remote_as, event.prefix, \
event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
def detect_peer_up(remote_ip, remote_as, uri_enabled, peer):
print 'Peer up', remote_ip, remote_as
if uri_enabled:
self.uri_enabled_capability = True
self.peer[remote_ip] = (
peer, self.uri_enabled_capability
) #Create peer dictionary with key ip and value a tuple of peer and uri_enabled capability
self.uri_enabled_capability = False
else:
self.peer[remote_ip] = (peer, False)
self.speaker = BGPSpeaker(
as_number=1000,
router_id='147.102.13.198',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down,
peer_up_handler=detect_peer_up)
#self.speaker = BGPSpeaker(as_number=1000, router_id='2.1.1.1',
# best_path_change_handler=dump_remote_best_path_change,
# peer_down_handler=detect_peer_down,peer_up_handler=detect_peer_up)
self.speaker.neighbor_add('147.102.13.156', 1000, next_hop='192.0.2.1')
#self.speaker.neighbor_add('192.168.1.2', 1001,enable_uri=True)
#self.speaker.neighbor_add('2.1.1.2', 1000, next_hop='192.0.2.1')
#alla = PrefixFilter('0.0.0.0/0',policy=PrefixFilter.POLICY_DENY)
#self.speaker.out_filter_set('192.168.1.2',[alla])
#self.speaker.out_filter_set('2.1.1.2',[alla])
#self.drop_to_router(AC(1000).create())
#self.speaker.
#eventlet.sleep(20)
#self.drop_to_router(['147.102.13.199/32'])
ofs = Switch()
eventlet.sleep(40)
ofs.add_flow("147.102.13.199")
"""
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd_util = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager() #获取SDN－IP配置信息
# 在Ryu上运行一个iBGPSpeaker
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number, #AS号
str(self.cfg_mgr.router_id), #iBGP的router id
bgp_server_port=self.cfg_mgr.listen_port, #监听BGP协议的端口号
best_path_change_handler=self.best_path_change_handler, #当路由信息变化时调用此方法
peer_down_handler=self.peer_down_handler, #BGP对等体下线
peer_up_handler=self.peer_up_handler) #BGP对等体上线
speaker_ids = self.cfg_mgr.get_all_speaker_id()
# 建立iBGPSpeaker与SDN域内的BGPSpeaker的连接
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
def bgp_create(self, as_number, router_id):
# MUDAR AQUI - INICIO
try:
self.bgp_speaker = BGPSpeaker(
as_number=as_number,
router_id=router_id,
best_path_change_handler=self.best_path_change_handler,
adj_rib_in_change_handler=self.adj_rib_in_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
except Exception as e:
print "Error creating bgp speaker: %s" % (e)
return (False, 'Failed to create BGP speaker')
# MUDAR AQUI - FIM
self.bgp_config['as_number'] = as_number
self.bgp_config['router_id'] = router_id
self.bgp_config['neighbors'] = []
self.bgp_config['adv_prefixes'] = []
self.persist_config()
return (True, 'Success')
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager('config.json')
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number,
self.cfg_mgr.router_id,
bgp_server_port=self.cfg_mgr.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
speaker_ids = self.cfg_mgr.get_all_speaker_id()
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
hub.spawn(self.prefix_check_loop)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(BGP_SERVER_PORT,
DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(LABEL_RANGE,
DEFAULT_LABEL_RANGE)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def _create_bgp_speaker_for_vlan(self, vlan, dp_id, vlan_vid):
"""Set up BGP speaker for an individual VLAN if required.
Args:
vlan (valve VLAN): VLAN for BGP speaker.
dp_id (int): Datapath ID for BGP speaker.
vlan_vid (vlan_vid): VLAN VID for BGP speaker.
Returns:
ryu.services.protocols.bgp.bgpspeaker.BGPSpeaker: BGP speaker.
"""
handler = lambda x: self._bgp_route_handler(x, dp_id, vlan_vid)
bgp_speaker = BGPSpeaker(
as_number=vlan.bgp_as,
router_id=vlan.bgp_routerid,
bgp_server_port=vlan.bgp_port,
bgp_server_hosts=vlan.bgp_server_addresses,
best_path_change_handler=handler,
peer_up_handler=self._bgp_up_handler,
peer_down_handler=self._bgp_down_handler)
for ip_dst, ip_gw in self._vlan_prefixes(vlan):
bgp_speaker.prefix_add(prefix=ip_dst, next_hop=ip_gw)
for bgp_neighbor_address in vlan.bgp_neighbor_addresses:
bgp_speaker.neighbor_add(
connect_mode=vlan.bgp_connect_mode,
address=bgp_neighbor_address,
remote_as=vlan.bgp_neighbor_as,
local_address=vlan.bgp_local_address,
enable_ipv4=True,
enable_ipv6=True)
return bgp_speaker
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Set event notify handlers if no corresponding handler specified.
bgp_settings['best_path_change_handler'] = settings.get(
'best_path_change_handler', self._notify_best_path_changed_event)
bgp_settings['peer_down_handler'] = settings.get(
'peer_down_handler', self._notify_peer_down_event)
bgp_settings['peer_up_handler'] = settings.get(
'peer_up_handler', self._notify_peer_up_event)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(
BGP_SERVER_PORT, DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(
LABEL_RANGE, DEFAULT_LABEL_RANGE)
bgp_settings['allow_local_as_in_count'] = settings.get(
'allow_local_as_in_count', 0)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Check required settings.
_required_settings = (
LOCAL_AS,
ROUTER_ID,
)
for required in _required_settings:
if required not in settings:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % required)
# Set event notify handlers if no corresponding handler specified.
settings.setdefault(
'best_path_change_handler', self._notify_best_path_changed_event)
settings.setdefault(
'peer_down_handler', self._notify_peer_down_event)
settings.setdefault(
'peer_up_handler', self._notify_peer_up_event)
# Pop settings other than creating BGPSpeaker instance.
neighbors_settings = settings.pop('neighbors', [])
vrfs_settings = settings.pop('vrfs', [])
routes_settings = settings.pop('routes', [])
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
settings.setdefault('as_number', settings.pop(LOCAL_AS))
self.speaker = BGPSpeaker(**settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(neighbors_settings)
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(vrfs_settings)
# Add routes
LOG.debug('Adding routes...')
self._add_routes(routes_settings)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(
BGP_SERVER_PORT, DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(
LABEL_RANGE, DEFAULT_LABEL_RANGE)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def _create_bgp_speaker_for_vlan(self, vlan):
"""Set up BGP speaker for an individual VLAN if required.
Args:
vlan (vlan): VLAN associated with this speaker.
Returns:
ryu.services.protocols.bgp.bgpspeaker.BGPSpeaker: BGP speaker.
"""
handler = lambda x: self._bgp_route_handler(x, vlan)
bgp_speaker = BGPSpeaker(as_number=vlan.bgp_as,
router_id=vlan.bgp_routerid,
bgp_server_port=vlan.bgp_port,
best_path_change_handler=handler)
for controller_ip in vlan.controller_ips:
prefix = ipaddr.IPNetwork('/'.join(
(str(controller_ip.ip), str(controller_ip.prefixlen))))
bgp_speaker.prefix_add(prefix=str(prefix),
next_hop=controller_ip.ip)
for route_table in (vlan.ipv4_routes, vlan.ipv6_routes):
for ip_dst, ip_gw in route_table.iteritems():
bgp_speaker.prefix_add(prefix=str(ip_dst), next_hop=str(ip_gw))
bgp_speaker.neighbor_add(address=vlan.bgp_neighbor_address,
remote_as=vlan.bgp_neighbor_as)
return bgp_speaker
class SDNIP(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {'fwd': FwdUtil, 'hop_db': HopDB}
"""
初始化方法
"""
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd_util = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager() #获取SDN－IP配置信息
# 在Ryu上运行一个iBGPSpeaker
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number, #AS号
str(self.cfg_mgr.router_id), #iBGP的router id
bgp_server_port=self.cfg_mgr.listen_port, #监听BGP协议的端口号
best_path_change_handler=self.best_path_change_handler, #当路由信息变化时调用此方法
peer_down_handler=self.peer_down_handler, #BGP对等体下线
peer_up_handler=self.peer_up_handler) #BGP对等体上线
speaker_ids = self.cfg_mgr.get_all_speaker_id()
# 建立iBGPSpeaker与SDN域内的BGPSpeaker的连接
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
# 启动一个线程，用于修复访问外部主机的数据路径
#hub.spawn(self.prefix_check_loop)
"""
当路由信息变化时，调用此方法，建立访问外部主机的数据路径。
参数：
ev: 路由更新时间，含有访问目的网络的下一跳地址信息。
建立的路径有:
1.穿过本地的流量到外部主机的路径(Transit Traffic ---> Internet)
2.本地主机访问外部主机的路径(Local Host ---> Internet)
"""
def best_path_change_handler(self, ev):
self.logger.info('best path changed:')
self.logger.info('remote_as: %d', ev.remote_as)
self.logger.info('route_dist: %s', ev.route_dist)
self.logger.info('prefix: %s', ev.prefix)
self.logger.info('nexthop: %s', ev.nexthop)
self.logger.info('label: %s', ev.label)
self.logger.info('is_withdraw: %s', ev.is_withdraw)
self.logger.info('')
# 取网络前缀
prefix_nw = IPNetwork(ev.prefix)
# 不处理本地网络更新
for internal_network in self.cfg_mgr.get_internal_networks():
int_nw = IPNetwork(internal_network)
if int_nw == prefix_nw:
self.logger.info('Internal network, ignored.')
return
if ev.is_withdraw:
self.hop_db.remove_hop(ev.prefix)
else:
# 记录访问目的网络的下一跳地址信息
self.hop_db.add_hop(ev.prefix, ev.nexthop)
"""
建立BGPSpeaker间的连接。
"""
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def bgp_packet_in_handler(self, ev):
msg = ev.msg
dp = msg.datapath
dpid = dp.id
ofproto = dp.ofproto
pkt = packet.Packet(msg.data)
tcp_header = pkt.get_protocol(tcp.tcp)
#只处理BGP数据包，tcp端口为179
if tcp_header is None or (tcp_header.src_port is not 179
and tcp_header.dst_port is not 179):
return
ipv4_header = pkt.get_protocol(ipv4.ipv4)
src_ip = ipv4_header.src
dst_ip = ipv4_header.dst
self.logger.info("BGP from %s to %s", src_ip, dst_ip)
# 获取源、目的主机信息
hosts = topo_api.get_all_host(self)
src_host = None
dst_host = None
for host in hosts:
if src_ip in host.ipv4:
src_host = host
elif dst_ip in host.ipv4:
dst_host = host
if src_host is None or dst_host is None:
return
# 建立BGPSpeaker间的数据路径
src_port = src_host.port
dst_port = dst_host.port
dst_mac = dst_host.mac
to_dst_match = dp.ofproto_parser.OFPMatch(eth_dst=dst_mac,
ipv4_dst=dst_ip,
eth_type=2048)
pre_actions = [dp.ofproto_parser.OFPActionSetField(eth_dst=dst_mac)]
port_no = self.fwd_util.setup_shortest_path(src_port.dpid,
dst_port.dpid,
dst_port.port_no,
to_dst_match, pre_actions)
# 将首个数据包直接递交给目的主机，防止首包丢失
if port_no is None:
return
self.fwd_util.packet_out(dp, msg, port_no)
"""
处理packet-in请求，建立到外部主机的单向数据路径。
"""
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
@packet_in_filter(RequiredTypeFilter, {'types': [ipv4.ipv4]})
def internal_host_route_handler(self, ev):
msg = ev.msg
dp = msg.datapath
dpid = dp.id
ofproto = dp.ofproto
pkt = packet.Packet(msg.data)
ipv4_header = pkt.get_protocol(ipv4.ipv4)
src_ip = ipv4_header.src
dst_ip = ipv4_header.dst
#只处理目的不是本地的访问
if self.cfg_mgr.is_internal_host(dst_ip):
return
# 获取下一跳信息，若下一条信息不存在，不处理
nexthop_info = self.hop_db.get_nexthop_by_ip(dst_ip)
if not nexthop_info:
return
nexthop_prefix = nexthop_info[0]
nexthop = nexthop_info[1]
nexthop_host = self.fwd_util.get_host(nexthop)
if nexthop_host is None:
return
# 建立主机间的数据路径
host_match = \
dp.ofproto_parser.OFPMatch(ipv4_dst=(str(nexthop_prefix.ip), str(nexthop_prefix.netmask)), eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=nexthop_host.mac)
]
self.logger.info("daowaiwaiwai")
self.fwd_util.setup_shortest_path(dpid, nexthop_host.port.dpid,
nexthop_host.port.port_no,
host_match, pre_actions)
# 将首个数据包直接递交给目的主机，防止首包丢失
switch = topo_api.get_switch(self, nexthop_host.port.dpid)[0]
self.fwd_util.packet_out(switch.dp, msg, nexthop_host.port.port_no)
"""
处理packet-in请求，建立目的主机为本地主机的单向数据路径。
"""
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
@packet_in_filter(RequiredTypeFilter, {'types': [ipv4.ipv4]})
def internet_to_host_route_handler(self, ev):
msg = ev.msg
dp = msg.datapath
dpid = dp.id
ofproto = dp.ofproto
pkt = packet.Packet(msg.data)
ipv4_header = pkt.get_protocol(ipv4.ipv4)
src_ip = ipv4_header.src
dst_ip = ipv4_header.dst
# 若目的主机不是本地主机，不处理
if not self.cfg_mgr.is_internal_host(dst_ip):
return
#获取目的主机信息，若目的主机不存在，不处理
dst_host = self.fwd_util.get_host(dst_ip)
if dst_host is None:
return
#到本地主机的数据路径
host_match = \
dp.ofproto_parser.OFPMatch(ipv4_dst=dst_ip, eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=dst_host.mac)
]
self.logger.info("daoneineinei")
self.fwd_util.setup_shortest_path(dpid, dst_host.port.dpid,
dst_host.port.port_no, host_match,
pre_actions)
# 将首个数据包直接递交给目的主机，防止首包丢失
switch = topo_api.get_switch(self, dst_host.port.dpid)[0]
self.fwd_util.packet_out(switch.dp, msg, dst_host.port.port_no)
def peer_down_handler(self, remote_ip, remote_as):
self.logger.info('peer down:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def peer_up_handler(self, remote_ip, remote_as):
self.logger.info('peer up:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
"""
修复访问外部主机的数据路径
"""
def prefix_check_loop(self):
while True:
prefixs_to_install = self.hop_db.get_uninstalled_prefix_list()
self.logger.debug("prefix to install: %s", str(prefixs_to_install))
for prefix in prefixs_to_install:
prefix_nw = IPNetwork(prefix)
for internal_network in self.cfg_mgr.get_internal_networks():
int_nw = IPNetwork(internal_network)
if int_nw == prefix_nw:
self.logger.info('Internal network, ignored.')
continue
nexthop = self.hop_db.get_nexthop(prefix)
self.install_best_path(prefix, nexthop)
hub.sleep(3)
"""
根据下一跳地址建立到目的网络的路径[Traffic(dst_ip in prefix) ---> nexthot host]
"""
def install_best_path(self, prefix, nexthop):
# 获取下一跳路由器信息
nexthop_host = self.fwd_util.get_host(nexthop)
self.logger.debug("nexthop host: %s", str(nexthop_host))
if nexthop_host is None:
return
nexthop_port = nexthop_host.port
nexthop_mac = nexthop_host.mac
nexthop_dpid = nexthop_port.dpid
nexthop_port_no = nexthop_port.port_no
prefix_ip = str(IPNetwork(prefix).ip)
prefix_mask = str(IPNetwork(prefix).netmask)
'''
在通往下一跳主机路径上的每个switch上下发流表：
匹配：
数据包类型为IPV4
目的ipv4网络为prefix
处理:
修改目的Mac为下一跳路由器Mac
将数据包转发往下一跳方向
'''
for dp in self.fwd_util.get_all_datapaths():
from_dpid = dp.id
nexthop_match = \
dp.ofproto_parser.OFPMatch(ipv4_dst=(prefix_ip, prefix_mask),
eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=nexthop_mac)
]
self.fwd_util.setup_shortest_path(from_dpid, nexthop_dpid,
nexthop_port_no, nexthop_match,
pre_actions)
self.hop_db.install_prefix(prefix)
#app_manager.require_app('ryu.app.gui_topology.gui_topology')
class SimpleBGPSpeaker(app_manager.RyuApp):
def __init__(self, *args, **kwargs):
super(SimpleBGPSpeaker, self).__init__(*args, **kwargs)
self.bgp_q = hub.Queue()
self.name = 'bgps'
self.bgpPeerStatus = {}
self.target_route_dist = None
self.bgp_thread = hub.spawn(self.monitor_target_remotePrefix)
def monitor_target_remotePrefix(self):
previous_route_dist = None
while True:
if self.target_route_dist == None:
pass
elif self.target_route_dist == previous_route_dist:
self.target_route_dist = None
else:
previous_route_dist = self.target_route_dist
time.sleep(60)
def dump_remote_best_path_change(self, event):
remote_prefix = {}
prefixInfo = IPNetwork(event.prefix)
remote_prefix['remote_as'] = event.remote_as
remote_prefix['route_dist'] = event.route_dist
remote_prefix['prefix'] = str(prefixInfo.ip)
remote_prefix['netmask'] = str(prefixInfo.netmask)
remote_prefix['nexthop'] = event.nexthop
remote_prefix['label'] = event.label
remote_prefix['withdraw'] = event.is_withdraw
LOG.debug("remote_prefix=%s"%remote_prefix)
if self.filter_regist_remotePrefix(event.route_dist):
self.bgp_q.put(remote_prefix)
def filter_regist_remotePrefix(self, route_dist):
if self.target_route_dist == None:
result = True
elif self.target_route_dist == route_dist:
result = True
else:
result = False
return result
def detect_peer_down(self, remote_ip, remote_as):
nowtime = datetime.datetime.now()
LOG.info("%s: Peer down!![remote_ip: %s, remote_as: %s]"%(nowtime, remote_ip, remote_as))
self.bgpPeerStatus[nowtime] = BgpPeerStatus(nowtime,
"Peer Down",
self.myRouterId,
remote_ip,
remote_as)
def detect_peer_up(self, remote_ip, remote_as):
nowtime = datetime.datetime.now()
LOG.info("%s: Peer up!![remote_ip: %s, remote_as: %s]"%(nowtime, remote_ip, remote_as))
self.bgpPeerStatus[nowtime] = BgpPeerStatus(nowtime,
"Peer Up",
self.myRouterId,
remote_ip,
remote_as)
def start_bgpspeaker(self, asNum, routerId, label_start, label_end):
self.myRouterId = routerId
self.labelRange = tuple([label_start, label_end])
self.speaker = BGPSpeaker(as_number=asNum, router_id=routerId,
best_path_change_handler=self.dump_remote_best_path_change,
peer_down_handler=self.detect_peer_down,
peer_up_handler=self.detect_peer_up,
label_range=self.labelRange)
def start_bmpclient(self, address, port):
return self.speaker.bmp_server_add(address, port)
def stop_bmpclient(self, address, port):
return self.speaker.bmp_server_del(address, port)
def add_neighbor(self, peerIp, asNumber, med, localPref, filterAsNum):
self.speaker.neighbor_add(peerIp, asNumber, is_next_hop_self=True,
enable_vpnv4=True, enable_enhanced_refresh=True,
multi_exit_disc=med)
if filterAsNum:
as_path_filter = ASPathFilter(filterAsNum,
policy=ASPathFilter.POLICY_TOP)
if localPref:
attribute_map = AttributeMap([as_path_filter],
AttributeMap.ATTR_LOCAL_PREF,
localPref)
self.speaker.attribute_map_set(peerIp, [attribute_map],
route_family='ipv4')
def add_vrf(self, routeDist, importList, exportList):
self.speaker.vrf_add(routeDist, importList, exportList)
self.target_route_dist = routeDist
def del_vrf(self, routeDist):
self.speaker.vrf_del(routeDist)
def add_prefix(self, ipaddress, netmask, nexthop=None, routeDist=None):
prefix = IPNetwork(ipaddress + '/' + netmask)
local_prefix = str(prefix.cidr)
if routeDist:
if nexthop:
LOG.info("Send BGP UPDATE Message [%s, %s]"%(local_prefix,
nexthop))
else:
LOG.info("Send BGP UPDATE Message [%s]"%local_prefix)
nexthop = "0.0.0.0"
result_list = self.speaker.prefix_add(local_prefix, nexthop,
routeDist)
result = result_list[0]
label = result['label']
return label
else:
if nexthop:
LOG.info("Send BGP UPDATE Message [%s, %s]"%(local_prefix,
nexthop))
self.speaker.prefix_add(local_prefix, nexthop)
else:
LOG.info("Send BGP UPDATE Message [%s]"%local_prefix)
self.speaker.prefix_add(local_prefix)
def remove_prefix(self, ipaddress, netmask, routeDist=None):
prefix = IPNetwork(ipaddress + '/' + netmask)
local_prefix = str(prefix.cidr)
LOG.info("Send BGP UPDATE(withdraw) Message [%s]"%local_prefix)
self.speaker.prefix_del(local_prefix, routeDist)
def show_rib(self):
family ="vpnv4"
format = "cli"
return self.speaker.rib_get(family, format)
def show_vrfs(self):
format = "cli"
return self.speaker.vrfs_get(format)
def show_neighbor(self, routetype, address):
format = "cli"
return self.speaker.neighbor_get(routetype, address, format)
def update_neighbor_med(self, peerIp, med_value):
conf_type = 'multi_exit_disc'
conf_value = med_value
LOG.info("Send BGP UPDATE Message for changing MED[%s]"%med_value)
return self.speaker.neighbor_update(peerIp, conf_type, conf_value)
class SDNIP(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {
'fwd': Fwd,
'hop_db': HopDB
}
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager()
self.waiters = {}
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number,
str(self.cfg_mgr.router_id),
bgp_server_port=self.cfg_mgr.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
speaker_ids = self.cfg_mgr.get_all_speaker_id()
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
hub.spawn(self.prefix_check_loop)
if with_dk:
dk_plugin.DynamicLoader.register_custom_cmd('sdn-ip:info', self.cmd_self_info)
dk_plugin.DynamicLoader.register_custom_cmd('sdn-ip:routes', self.cmd_list_routes)
dk_plugin.DynamicLoader.register_custom_cmd('sdn-ip:flows', self.cmd_get_flows)
def best_path_change_handler(self, ev):
self.logger.info('best path changed:')
self.logger.info('remote_as: %d', ev.remote_as)
self.logger.info('route_dist: %s', ev.route_dist)
self.logger.info('prefix: %s', ev.prefix)
self.logger.info('nexthop: %s', ev.nexthop)
self.logger.info('label: %s', ev.label)
self.logger.info('is_withdraw: %s', ev.is_withdraw)
self.logger.info('')
# Ignore internal network
prefix_nw = IPNetwork(ev.prefix)
for internal_network in self.cfg_mgr.get_internal_networks():
int_nw = IPNetwork(internal_network)
if int_nw == prefix_nw:
self.logger.info('Internal network, ignored.')
return
if ev.is_withdraw:
self.hop_db.withdraw(ev.prefix)
self.uninstall_best_path(ev.prefix, ev.nexthop)
else:
self.hop_db.add_hop(ev.prefix, ev.nexthop)
self.install_best_path(ev.prefix, ev.nexthop)
def peer_down_handler(self, remote_ip, remote_as):
self.logger.info('peer down:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def peer_up_handler(self, remote_ip, remote_as):
self.logger.info('peer up:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def get_host(self, ip):
hosts = topo_api.get_all_host(self)
for host in hosts:
if ip in host.ipv4:
return host
return None
def prefix_check_loop(self):
while True:
prefixs_to_install = self.hop_db.get_uninstalled_prefix_list()
self.logger.debug("prefix to install: %s", str(prefixs_to_install))
for prefix in prefixs_to_install:
nexthop = self.hop_db.get_nexthop(prefix)
self.install_best_path(prefix, nexthop)
hub.sleep(3)
def install_best_path(self, prefix, nexthop):
nexthop_host = self.get_host(nexthop)
self.logger.debug("nexthop host: %s", str(nexthop_host))
if nexthop_host is None:
self.logger.debug("Can't find nexthop host: %s", str(nexthop_host))
return
nexthop_port = nexthop_host.port
nexthop_mac = nexthop_host.mac
nexthop_dpid = nexthop_port.dpid
nexthop_port_no = nexthop_port.port_no
prefix_ip = str(IPNetwork(prefix).ip)
prefix_mask = str(IPNetwork(prefix).netmask)
for dp in self.fwd.get_all_datapaths():
from_dpid = dp.id
nexthop_match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=(prefix_ip, prefix_mask),
eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=nexthop_mac)
]
self.fwd.setup_shortest_path(from_dpid,
nexthop_dpid,
nexthop_port_no,
nexthop_match,
pre_actions)
self.hop_db.install_prefix(prefix)
def uninstall_best_path(self, prefix, nexthop):
prefix_ip = str(IPNetwork(prefix).ip)
prefix_mask = str(IPNetwork(prefix).netmask)
# remove all flow rule for this prefix
for dp in self.fwd.get_all_datapaths():
match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=(prefix_ip, prefix_mask),
eth_type=2048)
flow_del = dp.ofproto_parser.OFPFlowMod(datapath=dp,
command=OFPFC_DELETE,
match=match)
dp.send_msg(flow_del)
def install_internal_host_path(self, ip):
host = self.get_host(ip)
if host is None:
return
for dp in self.fwd.get_all_datapaths():
from_dpid = dp.id
host_match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=ip, eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=host.mac)
]
self.fwd.setup_shortest_path(from_dpid,
host.port.dpid,
host.port.port_no,
host_match,
pre_actions)
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
@packet_in_filter(RequiredTypeFilter, {'types': [ipv4.ipv4]})
def internal_host_route_handler(self, ev):
'''
Handle internal network host routing
'''
msg = ev.msg
dp = msg.datapath
dpid = dp.id
ofproto = dp.ofproto
pkt = packet.Packet(msg.data)
ipv4_header = pkt.get_protocol(ipv4.ipv4)
src_ip = ipv4_header.src
dst_ip = ipv4_header.dst
if not self.cfg_mgr.is_internal_host(dst_ip):
return
self.install_internal_host_path(dst_ip)
@set_ev_cls(ofp_event.EventOFPFlowStatsReply, MAIN_DISPATCHER)
def flow_status_reply_handler(self, ev):
msg = ev.msg
dp = msg.datapath
if dp.id not in self.waiters:
return
if msg.xid not in self.waiters[dp.id]:
return
lock, msgs = self.waiters[dp.id][msg.xid]
msgs.append(msg)
flags = 0
flags = dp.ofproto.OFPMPF_REPLY_MORE
if msg.flags & flags:
return
del self.waiters[dp.id][msg.xid]
lock.set()
# commands
def cmd_self_info(self):
information = "AS number : {}\n" + \
"Router ID: {}\n" + \
"BGP port: {}\n"
information = information.format(self.cfg_mgr.as_number,
str(self.cfg_mgr.router_id),
self.cfg_mgr.listen_port)
return information
def cmd_list_routes(self):
prefix_list = self.hop_db.get_all_prefixes()
result = "{:<20}{:<17}{}\n".format("Prefix", "Next Hop", "Path installed")
result = result + "=" * 40 + "\n"
for prefix in prefix_list:
result = result + "{:<20}".format(prefix)
_next_hop = self.hop_db.hops.get(prefix)
if _next_hop is None:
_next_hop = "None"
result = result + "{:<17}".format(_next_hop)
result = result + str(self.hop_db.is_prefix_installed(prefix))
result = result + "\n"
return result
def cmd_get_flows(self):
result = ""
for dp in self.fwd.get_all_datapaths():
flows = ofctl_v1_3.get_flow_stats(dp, self.waiters, {})
result = result + "{:0>16}:\n".format(dp.id)
result = result + "=" * 17 + "\n"
for flow in flows:
result = result + json.dumps(flow) + "\n"
return result
class SDNIP(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {'fwd': Fwd, 'hop_db': HopDB}
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager()
self.waiters = {}
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number,
str(self.cfg_mgr.router_id),
bgp_server_port=self.cfg_mgr.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
speaker_ids = self.cfg_mgr.get_all_speaker_id()
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
hub.spawn(self.prefix_check_loop)
if with_dk:
dk_plugin.DynamicLoader.register_custom_cmd(
'sdn-ip:info', self.cmd_self_info)
dk_plugin.DynamicLoader.register_custom_cmd(
'sdn-ip:routes', self.cmd_list_routes)
dk_plugin.DynamicLoader.register_custom_cmd(
'sdn-ip:flows', self.cmd_get_flows)
def best_path_change_handler(self, ev):
self.logger.info('best path changed:')
self.logger.info('remote_as: %d', ev.remote_as)
self.logger.info('route_dist: %s', ev.route_dist)
self.logger.info('prefix: %s', ev.prefix)
self.logger.info('nexthop: %s', ev.nexthop)
self.logger.info('label: %s', ev.label)
self.logger.info('is_withdraw: %s', ev.is_withdraw)
self.logger.info('')
# Ignore internal network
prefix_nw = IPNetwork(ev.prefix)
for internal_network in self.cfg_mgr.get_internal_networks():
int_nw = IPNetwork(internal_network)
if int_nw == prefix_nw:
self.logger.info('Internal network, ignored.')
return
if ev.is_withdraw:
self.hop_db.withdraw(ev.prefix)
self.uninstall_best_path(ev.prefix, ev.nexthop)
else:
self.hop_db.add_hop(ev.prefix, ev.nexthop)
self.install_best_path(ev.prefix, ev.nexthop)
def peer_down_handler(self, remote_ip, remote_as):
self.logger.info('peer down:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def peer_up_handler(self, remote_ip, remote_as):
self.logger.info('peer up:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def get_host(self, ip):
hosts = topo_api.get_all_host(self)
for host in hosts:
if ip in host.ipv4:
return host
return None
def prefix_check_loop(self):
while True:
prefixs_to_install = self.hop_db.get_uninstalled_prefix_list()
self.logger.debug("prefix to install: %s", str(prefixs_to_install))
for prefix in prefixs_to_install:
nexthop = self.hop_db.get_nexthop(prefix)
self.install_best_path(prefix, nexthop)
hub.sleep(3)
def install_best_path(self, prefix, nexthop):
nexthop_host = self.get_host(nexthop)
self.logger.debug("nexthop host: %s", str(nexthop_host))
if nexthop_host is None:
self.logger.debug("Can't find nexthop host: %s", str(nexthop_host))
return
nexthop_port = nexthop_host.port
nexthop_mac = nexthop_host.mac
nexthop_dpid = nexthop_port.dpid
nexthop_port_no = nexthop_port.port_no
prefix_ip = str(IPNetwork(prefix).ip)
prefix_mask = str(IPNetwork(prefix).netmask)
for dp in self.fwd.get_all_datapaths():
from_dpid = dp.id
nexthop_match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=(prefix_ip, prefix_mask),
eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=nexthop_mac)
]
self.fwd.setup_shortest_path(from_dpid, nexthop_dpid,
nexthop_port_no, nexthop_match,
pre_actions)
self.hop_db.install_prefix(prefix)
def uninstall_best_path(self, prefix, nexthop):
prefix_ip = str(IPNetwork(prefix).ip)
prefix_mask = str(IPNetwork(prefix).netmask)
# remove all flow rule for this prefix
for dp in self.fwd.get_all_datapaths():
match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=(prefix_ip, prefix_mask),
eth_type=2048)
flow_del = dp.ofproto_parser.OFPFlowMod(datapath=dp,
command=OFPFC_DELETE,
match=match)
dp.send_msg(flow_del)
def install_internal_host_path(self, ip):
host = self.get_host(ip)
if host is None:
return
for dp in self.fwd.get_all_datapaths():
from_dpid = dp.id
host_match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=ip, eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=host.mac)
]
self.fwd.setup_shortest_path(from_dpid, host.port.dpid,
host.port.port_no, host_match,
pre_actions)
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
@packet_in_filter(RequiredTypeFilter, {'types': [ipv4.ipv4]})
def internal_host_route_handler(self, ev):
'''
Handle internal network host routing
'''
msg = ev.msg
dp = msg.datapath
dpid = dp.id
ofproto = dp.ofproto
pkt = packet.Packet(msg.data)
ipv4_header = pkt.get_protocol(ipv4.ipv4)
src_ip = ipv4_header.src
dst_ip = ipv4_header.dst
if not self.cfg_mgr.is_internal_host(dst_ip):
return
self.install_internal_host_path(dst_ip)
@set_ev_cls(ofp_event.EventOFPFlowStatsReply, MAIN_DISPATCHER)
def flow_status_reply_handler(self, ev):
msg = ev.msg
dp = msg.datapath
if dp.id not in self.waiters:
return
if msg.xid not in self.waiters[dp.id]:
return
lock, msgs = self.waiters[dp.id][msg.xid]
msgs.append(msg)
flags = 0
flags = dp.ofproto.OFPMPF_REPLY_MORE
if msg.flags & flags:
return
del self.waiters[dp.id][msg.xid]
lock.set()
# commands
def cmd_self_info(self):
information = "AS number : {}\n" + \
"Router ID: {}\n" + \
"BGP port: {}\n"
information = information.format(self.cfg_mgr.as_number,
str(self.cfg_mgr.router_id),
self.cfg_mgr.listen_port)
return information
def cmd_list_routes(self):
prefix_list = self.hop_db.get_all_prefixes()
result = "{:<20}{:<17}{}\n".format("Prefix", "Next Hop",
"Path installed")
result = result + "=" * 40 + "\n"
for prefix in prefix_list:
result = result + "{:<20}".format(prefix)
_next_hop = self.hop_db.hops.get(prefix)
if _next_hop is None:
_next_hop = "None"
result = result + "{:<17}".format(_next_hop)
result = result + str(self.hop_db.is_prefix_installed(prefix))
result = result + "\n"
return result
def cmd_get_flows(self):
result = ""
for dp in self.fwd.get_all_datapaths():
flows = ofctl_v1_3.get_flow_stats(dp, self.waiters, {})
result = result + "{:0>16}:\n".format(dp.id)
result = result + "=" * 17 + "\n"
for flow in flows:
result = result + json.dumps(flow) + "\n"
return result
class RyuBGPSpeaker(RyuApp):
"""
Base application for implementing BGP applications.
This application will notifies
- ``EventBestPathChanged``
- ``EventPeerDown``
- ``EventPeerUp``
to other BGP applications.
To catch these events, specify ``@set_ev_cls()`` decorator to the event
handlers in the Ryu applications.
Example::
...
from ryu.base import app_manager
from ryu.controller.handler import set_ev_cls
from ryu.services.protocols.bgp import application as bgp_application
...
class MyBGPApp(app_manager.RyuApp):
_CONTEXTS = {
'ryubgpspeaker': bgp_application.RyuBGPSpeaker,
}
...
@set_ev_cls(bgp_application.EventBestPathChanged)
def _best_patch_changed_handler(self, ev):
self.logger.info(
'Best path changed: is_withdraw=%s, path=%s',
ev.is_withdraw, ev.path)
"""
_EVENTS = [
EventBestPathChanged,
EventPeerDown,
EventPeerUp,
]
def __init__(self, *args, **kwargs):
super(RyuBGPSpeaker, self).__init__(*args, **kwargs)
self.config_file = CONF.config_file
# BGPSpeaker instance (not instantiated yet)
self.speaker = None
def start(self):
super(RyuBGPSpeaker, self).start()
# If configuration file was provided and loaded successfully, we start
# BGPSpeaker using the given settings.
# If no configuration file is provided or if any minimum required
# setting is missing, BGPSpeaker will not be started.
if self.config_file:
LOG.debug('Loading config file %s...', self.config_file)
settings = load_config(self.config_file)
# Configure logging settings, if available.
if hasattr(settings, 'LOGGING'):
# Not implemented yet.
LOG.debug('Loading LOGGING settings... (NOT implemented yet)')
# from logging.config import dictConfig
# logging_settings = dictConfig(settings.LOGGING)
# Configure BGP settings, if available.
if hasattr(settings, 'BGP'):
LOG.debug('Loading BGP settings...')
self._start_speaker(settings.BGP)
# Configure SSH settings, if available.
if hasattr(settings, 'SSH'):
LOG.debug('Loading SSH settings...')
# Note: paramiko used in bgp.operator.ssh is the optional
# requirements, imports bgp.operator.ssh here.
from ryu.services.protocols.bgp.operator import ssh
hub.spawn(ssh.SSH_CLI_CONTROLLER.start, **settings.SSH)
# Start RPC server with the given RPC settings.
rpc_settings = {
NC_RPC_BIND_PORT: CONF.rpc_port,
NC_RPC_BIND_IP: validate_rpc_host(CONF.rpc_host),
}
return hub.spawn(NET_CONTROLLER.start, **rpc_settings)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Set event notify handlers if no corresponding handler specified.
bgp_settings['best_path_change_handler'] = settings.get(
'best_path_change_handler', self._notify_best_path_changed_event)
bgp_settings['peer_down_handler'] = settings.get(
'peer_down_handler', self._notify_peer_down_event)
bgp_settings['peer_up_handler'] = settings.get(
'peer_up_handler', self._notify_peer_up_event)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(BGP_SERVER_PORT,
DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(LABEL_RANGE,
DEFAULT_LABEL_RANGE)
bgp_settings['allow_local_as_in_count'] = settings.get(
'allow_local_as_in_count', 0)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def _notify_best_path_changed_event(self, ev):
ev = EventBestPathChanged(ev.path, ev.is_withdraw)
self.send_event_to_observers(ev)
def _notify_peer_down_event(self, remote_ip, remote_as):
ev = EventPeerDown(remote_ip, remote_as)
self.send_event_to_observers(ev)
def _notify_peer_up_event(self, remote_ip, remote_as):
ev = EventPeerUp(remote_ip, remote_as)
self.send_event_to_observers(ev)
def _add_neighbors(self, settings):
"""
Add BGP neighbors from the given settings.
All valid neighbors are loaded.
Miss-configured neighbors are ignored and errors are logged.
"""
for neighbor_settings in settings:
LOG.debug('Adding neighbor settings: %s', neighbor_settings)
try:
self.speaker.neighbor_add(**neighbor_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_vrfs(self, settings):
"""
Add BGP VRFs from the given settings.
All valid VRFs are loaded.
Miss-configured VRFs are ignored and errors are logged.
"""
for vrf_settings in settings:
LOG.debug('Adding VRF settings: %s', vrf_settings)
try:
self.speaker.vrf_add(**vrf_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_routes(self, settings):
"""
Add BGP routes from given settings.
All valid routes are loaded.
Miss-configured routes are ignored and errors are logged.
"""
for route_settings in settings:
if 'prefix' in route_settings:
prefix_add = self.speaker.prefix_add
elif 'route_type' in route_settings:
prefix_add = self.speaker.evpn_prefix_add
else:
LOG.debug('Skip invalid route settings: %s', route_settings)
continue
LOG.debug('Adding route settings: %s', route_settings)
try:
prefix_add(**route_settings)
except RuntimeConfigError as e:
LOG.exception(e)
log.addHandler(logging.StreamHandler(sys.stderr))
from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker
def dump_remote_best_path_change(event):
print 'the best path changed:', event.remote_as, event.prefix, event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
if __name__ == "__main__":
speaker = BGPSpeaker(as_number=20,
router_id='1.1.1.1',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
speaker.neighbor_add("10.108.90.1", 10)
speaker.neighbor_add("10.108.91.1", 30)
#speaker.neighbor_add("10.108.92.1",40)
#print speaker.rib_get()
#speaker.neighbor_add("10.108.91.1",30)
#uncomment the below line if the speaker needs to talk with a bmp server
#speaker.bmp_server_add('192.168.177.2',11019)
count = 1
while True:
eventlet.sleep(10)
prefix = '10.108.' + str(count) + '.0/24'
class SDNIP(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
_CONTEXTS = {
'fwd': Fwd,
'hop_db': HopDB
}
def __init__(self, *args, **kwargs):
super(SDNIP, self).__init__(*args, **kwargs)
self.fwd = kwargs['fwd']
self.hop_db = kwargs['hop_db']
self.cfg_mgr = SDNIPConfigManager('config.json')
self.bgp_speaker =\
BGPSpeaker(self.cfg_mgr.as_number,
self.cfg_mgr.router_id,
bgp_server_port=self.cfg_mgr.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
speaker_ids = self.cfg_mgr.get_all_speaker_id()
for speaker_id in speaker_ids:
self.bgp_speaker.neighbor_add(speaker_id,
self.cfg_mgr.as_number,
is_next_hop_self=True)
hub.spawn(self.prefix_check_loop)
def best_path_change_handler(self, ev):
self.logger.info('best path changed:')
self.logger.info('remote_as: %d', ev.remote_as)
self.logger.info('route_dist: %s', ev.route_dist)
self.logger.info('prefix: %s', ev.prefix)
self.logger.info('nexthop: %s', ev.nexthop)
self.logger.info('label: %s', ev.label)
self.logger.info('is_withdraw: %s', ev.is_withdraw)
self.logger.info('')
self.hop_db.add_hop(ev.prefix, ev.nexthop)
self.install_best_path(ev.prefix, ev.nexthop)
def peer_down_handler(self, remote_ip, remote_as):
self.logger.info('peer down:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def peer_up_handler(self, remote_ip, remote_as):
self.logger.info('peer up:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def get_nexthop_host(self, ip):
hosts = topo_api.get_all_host(self)
for host in hosts:
if ip in host.ipv4:
return host
return None
def prefix_check_loop(self):
while True:
prefixs_to_install = self.hop_db.get_uninstalled_prefix_list()
self.logger.debug("prefix to install: %s", str(prefixs_to_install))
for prefix in prefixs_to_install:
nexthop = self.hop_db.get_nexthop(prefix)
self.install_best_path(prefix, nexthop)
hub.sleep(3)
def install_best_path(self, prefix, nexthop):
nexthop_host = self.get_nexthop_host(nexthop)
self.logger.debug("nexthop host: %s", str(nexthop_host))
if nexthop_host is None:
return
nexthop_port = nexthop_host.port
nexthop_mac = nexthop_host.mac
nexthop_dpid = nexthop_port.dpid
nexthop_port_no = nexthop_port.port_no
prefix_ip = str(IPNetwork(prefix).ip)
prefix_mask = str(IPNetwork(prefix).netmask)
for dp in self.fwd.get_all_datapaths():
from_dpid = dp.id
nexthop_match =\
dp.ofproto_parser.OFPMatch(ipv4_dst=(prefix_ip, prefix_mask),
eth_type=2048)
pre_actions = [
dp.ofproto_parser.OFPActionSetField(eth_dst=nexthop_mac)
]
self.fwd.setup_shortest_path(from_dpid,
nexthop_dpid,
nexthop_port_no,
nexthop_match,
pre_actions)
self.hop_db.install_prefix(prefix)
class RyuBGPSpeaker(RyuApp):
def __init__(self, *args, **kwargs):
super(RyuBGPSpeaker, self).__init__(*args, **kwargs)
self.config_file = CONF.config_file
# BGPSpeaker instance (not instantiated yet)
self.speaker = None
def start(self):
super(RyuBGPSpeaker, self).start()
# If configuration file was provided and loaded successfully, we start
# BGPSpeaker using the given settings.
# If no configuration file is provided or if any minimum required
# setting is missing, BGPSpeaker will not be started.
if self.config_file:
LOG.debug('Loading config file %s...', self.config_file)
settings = load_config(self.config_file)
# Configure logging settings, if available.
if hasattr(settings, 'LOGGING'):
# Not implemented yet.
LOG.debug('Loading LOGGING settings... (NOT implemented yet)')
# from logging.config import dictConfig
# logging_settings = dictConfig(settings.LOGGING)
# Configure BGP settings, if available.
if hasattr(settings, 'BGP'):
LOG.debug('Loading BGP settings...')
self._start_speaker(settings.BGP)
# Configure SSH settings, if available.
if hasattr(settings, 'SSH'):
LOG.debug('Loading SSH settings...')
hub.spawn(SSH_CLI_CONTROLLER.start, **settings.SSH)
# Start RPC server with the given RPC settings.
rpc_settings = {
NC_RPC_BIND_PORT: CONF.rpc_port,
NC_RPC_BIND_IP: validate_rpc_host(CONF.rpc_host),
}
return hub.spawn(NET_CONTROLLER.start, **rpc_settings)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(
BGP_SERVER_PORT, DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(
LABEL_RANGE, DEFAULT_LABEL_RANGE)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def _add_neighbors(self, settings):
"""
Add BGP neighbors from the given settings.
All valid neighbors are loaded.
Miss-configured neighbors are ignored and errors are logged.
"""
for neighbor_settings in settings:
LOG.debug('Adding neighbor settings: %s', neighbor_settings)
try:
self.speaker.neighbor_add(**neighbor_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_vrfs(self, settings):
"""
Add BGP VRFs from the given settings.
All valid VRFs are loaded.
Miss-configured VRFs are ignored and errors are logged.
"""
for vrf_settings in settings:
LOG.debug('Adding VRF settings: %s', vrf_settings)
try:
self.speaker.vrf_add(**vrf_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_routes(self, settings):
"""
Add BGP routes from given settings.
All valid routes are loaded.
Miss-configured routes are ignored and errors are logged.
"""
for route_settings in settings:
if 'prefix' in route_settings:
prefix_add = self.speaker.prefix_add
elif 'route_type' in route_settings:
prefix_add = self.speaker.evpn_prefix_add
else:
LOG.debug('Skip invalid route settings: %s', route_settings)
continue
LOG.debug('Adding route settings: %s', route_settings)
try:
prefix_add(**route_settings)
except RuntimeConfigError as e:
LOG.exception(e)
event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
SSH = {
'ssh_port': 4990,
'ssh_host': 'localhost',
'ssh_host_key': '/etc/ssh_host_rsa_key',
'ssh_username': '******',
'ssh_password': '******',
}
if __name__ == "__main__":
speaker = BGPSpeaker(as_number=65005, router_id='172.16.1.174',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
speaker.neighbor_add('172.16.1.175', 65003)
count = 0
while True:
eventlet.sleep(5)
prefix = '192.168.' + str(count) + '.0/24'
print "add a new prefix", prefix
speaker.prefix_add(prefix)
count += 1
print("Neighbors: ", speaker.neighbors_get())
print("Routes: ", speaker.rib_get())
from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker
'''
sudo /usr/bin/python2.7 "/home/walber/Dropbox/SDN - Controllers/ryu/ryu/app/COOL/topology_management/bgp_tester.py"
'''
def dump_remote_best_path_change(event):
print 'the best path changed:', event.remote_as, event.prefix,\
event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
if __name__ == "__main__":
speaker = BGPSpeaker(as_number=65001, router_id='192.168.25.7',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
speaker.neighbor_add('192.168.25.2', 65002)
# uncomment the below line if the speaker needs to talk with a bmp server.
# speaker.bmp_server_add('192.168.177.2', 11019)
count = 1
while True:
print "Oi"
eventlet.sleep(30)
prefix = '10.20.' + str(count) + '.0/24'
print "add a new prefix", prefix
speaker.prefix_add(prefix)
count += 1
if count == 4:
speaker.shutdown()
class RyuBGPSpeaker(RyuApp):
"""
Base application for implementing BGP applications.
"""
_EVENTS = [
EventBestPathChanged,
EventAdjRibInChanged,
EventPeerDown,
EventPeerUp,
]
def __init__(self, *args, **kwargs):
super(RyuBGPSpeaker, self).__init__(*args, **kwargs)
self.config_file = CONF.config_file
# BGPSpeaker instance (not instantiated yet)
self.speaker = None
def start(self):
super(RyuBGPSpeaker, self).start()
# If configuration file was provided and loaded successfully, we start
# BGPSpeaker using the given settings.
# If no configuration file is provided or if any minimum required
# setting is missing, BGPSpeaker will not be started.
if self.config_file:
LOG.debug('Loading config file %s...', self.config_file)
settings = load_config(self.config_file)
# Configure logging settings, if available.
if hasattr(settings, 'LOGGING'):
# Not implemented yet.
LOG.debug('Loading LOGGING settings... (NOT implemented yet)')
# from logging.config import dictConfig
# logging_settings = dictConfig(settings.LOGGING)
# Configure BGP settings, if available.
if hasattr(settings, 'BGP'):
LOG.debug('Loading BGP settings...')
self._start_speaker(settings.BGP)
# Configure SSH settings, if available.
if hasattr(settings, 'SSH'):
LOG.debug('Loading SSH settings...')
# Note: paramiko used in bgp.operator.ssh is the optional
# requirements, imports bgp.operator.ssh here.
from ryu.services.protocols.bgp.operator import ssh
hub.spawn(ssh.SSH_CLI_CONTROLLER.start, **settings.SSH)
# Start RPC server with the given RPC settings.
rpc_settings = {
NC_RPC_BIND_PORT: CONF.rpc_port,
NC_RPC_BIND_IP: validate_rpc_host(CONF.rpc_host),
}
return hub.spawn(NET_CONTROLLER.start, **rpc_settings)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Check required settings.
_required_settings = (
LOCAL_AS,
ROUTER_ID,
)
for required in _required_settings:
if required not in settings:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % required)
# Set event notify handlers if no corresponding handler specified.
settings.setdefault('best_path_change_handler',
self._notify_best_path_changed_event)
settings.setdefault('adj_rib_in_change_handler',
self._notify_adj_rib_in_changed_event)
settings.setdefault('peer_down_handler', self._notify_peer_down_event)
settings.setdefault('peer_up_handler', self._notify_peer_up_event)
# Pop settings other than creating BGPSpeaker instance.
neighbors_settings = settings.pop('neighbors', [])
vrfs_settings = settings.pop('vrfs', [])
routes_settings = settings.pop('routes', [])
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
settings.setdefault('as_number', settings.pop(LOCAL_AS))
self.speaker = BGPSpeaker(**settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(neighbors_settings)
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(vrfs_settings)
# Add routes
LOG.debug('Adding routes...')
self._add_routes(routes_settings)
def _notify_best_path_changed_event(self, ev):
ev = EventBestPathChanged(ev.path, ev.is_withdraw)
self.send_event_to_observers(ev)
def _notify_adj_rib_in_changed_event(self, ev, peer_ip, peer_as):
ev = EventAdjRibInChanged(ev.path, ev.is_withdraw, peer_ip, peer_as)
self.send_event_to_observers(ev)
def _notify_peer_down_event(self, remote_ip, remote_as):
ev = EventPeerDown(remote_ip, remote_as)
self.send_event_to_observers(ev)
def _notify_peer_up_event(self, remote_ip, remote_as):
ev = EventPeerUp(remote_ip, remote_as)
self.send_event_to_observers(ev)
def _add_neighbors(self, settings):
"""
Add BGP neighbors from the given settings.
All valid neighbors are loaded.
Miss-configured neighbors are ignored and errors are logged.
"""
for neighbor_settings in settings:
LOG.debug('Adding neighbor settings: %s', neighbor_settings)
try:
self.speaker.neighbor_add(**neighbor_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_vrfs(self, settings):
"""
Add BGP VRFs from the given settings.
All valid VRFs are loaded.
Miss-configured VRFs are ignored and errors are logged.
"""
for vrf_settings in settings:
LOG.debug('Adding VRF settings: %s', vrf_settings)
try:
self.speaker.vrf_add(**vrf_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_routes(self, settings):
"""
Add BGP routes from given settings.
All valid routes are loaded.
Miss-configured routes are ignored and errors are logged.
"""
for route_settings in settings:
if 'prefix' in route_settings:
prefix_add = self.speaker.prefix_add
elif 'route_type' in route_settings:
prefix_add = self.speaker.evpn_prefix_add
elif 'flowspec_family' in route_settings:
prefix_add = self.speaker.flowspec_prefix_add
else:
LOG.debug('Skip invalid route settings: %s', route_settings)
continue
LOG.debug('Adding route settings: %s', route_settings)
try:
prefix_add(**route_settings)
except RuntimeConfigError as e:
LOG.exception(e)
import sys
log = logging.getLogger()
log.addHandler(logging.StreamHandler(sys.stderr))
from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker
def dump_remote_best_path_change(event):
print 'the best path changed:',event.remote_as,event.prefix,event.nexthop,event.is_withdraw
def detect_peer_down(remote_ip,remote_as):
print 'Peer down:',remote_ip,remote_as
if __name__=="__main__":
speaker = BGPSpeaker(as_number=20,router_id='1.1.1.1',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down
)
speaker.neighbor_add("10.108.90.1",10)
speaker.neighbor_add("10.108.91.1",30)
#speaker.neighbor_add("10.108.92.1",40)
#print speaker.rib_get()
#speaker.neighbor_add("10.108.91.1",30)
#uncomment the below line if the speaker needs to talk with a bmp server
#speaker.bmp_server_add('192.168.177.2',11019)
import eventlet
import json
eventlet.monkey_patch()
import logging
import sys
log = logging.getLogger()
log.addHandler(logging.StreamHandler(sys.stderr))
log.setLevel(logging.DEBUG)
from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker
if __name__ == "__main__":
speaker = BGPSpeaker(as_number=10, router_id='10.0.0.1',
ssh_console=True)
speaker.neighbor_add('10.9.10.1', 9)
speaker.neighbor_add('10.5.10.1', 5)
prefix = '10.0.0.0/8'
print "add a new prefix", prefix
speaker.prefix_add(prefix)
while True:
eventlet.sleep(5)
class BGP_Speaker(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_3.OFP_VERSION]
def __init__(self, hosts=None, networks=None, *args, **kwargs):
super(BGP_Speaker, self).__init__(*args, **kwargs)
self.networks = networks
self.hosts = hosts
# Configuring AS 65501:
self.as_number = 65001
#self.remote_as = 65501
self.router_id = '192.168.25.7'
self.router_next_hop = "10.0.254.254" # The source IP of the BGP
self.listen_port = 179
self.bgp_speaker = \
BGPSpeaker(self.as_number,
self.router_id,
bgp_server_port=self.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
# print "<<<<<<<<<",self.bgp_speaker
# speaker = BGPSpeaker(as_number=65001, router_id='192.168.25.7',
# best_path_change_handler=dump_remote_best_path_change,
# peer_down_handler=detect_peer_down)
self.neighbor1 = Neighbor(ip="192.168.25.2",
asn=65002,
next_hop="10.0.1.254",
border_switch=2,
sw_port=1,
controller_ip="10.0.1.254")
#self.neighbor2 = Neighbor(ip="10.0.2.2", asn=65002,next_hop="10.0.1.254", border_switch=2, sw_port=2, controller_ip="10.0.1.254")
# self.neighbor = {"10.0.1.1": {'asn': 65001,'switch':2, 'port': 1,'controller_ip':"10.0.1.254"},
# "10.0.2.2": {'asn': 65002,'switch':2, 'port': 2,'controller_ip':"10.0.2.254"},
# }
self.neighbors = [self.neighbor1] #,self.neighbor2]
#self.local_networks = {"192.168.2.0/24":{'controller_ip':"192.168.2.254"}}
self.prefix_add(prefix="192.168.2.0/24", next_hop="192.168.2.254")
# Adding neighbors:
#TODO: Verify the option of next_hop
for neighbor in self.neighbors:
# self.bgp_speaker.neighbor_add(address=neighbor, remote_as=self.neighbor[neighbor]['asn'],
# next_hop=self.router_next_hop,
# is_next_hop_self=True)
self.neighbors_add(neighbor)
# for network in self.local_networks:
# # Adding prefixes:
# self.bgp_speaker.prefix_add(network, self.neighbor[neighbor]['controller_ip']) # next_hop (how to reach the network)
# #self.bgp_speaker.prefix_add("192.168.2.0/24", "10.0.2.254") # next_hop (how to reach the network)
# # self.bgp_speaker.prefix_add("10.0.0.0/24", "10.0.1.1")
# "10.0.3.1": 'fe:00:00:00:00:03'}
# self.arp_controller = '00:00:00:00:00:fe'
# self.monitor_thread = hub.spawn(self._monitor)
# self.best_paths ={}
self.prefix_learned = {} # "198.51.100.0/24",'10.0.1.0/24'}
self.is_load_balancer_active = False
self.load_balancer = {}
#self.monitor_thread = hub.spawn(self.stand_alone)
print "BGP Speaker started! ;)"
self.stand_alone()
def stand_alone(self):
#print "Oi"
while True:
eventlet.sleep(3)
""" This method returns the BGP adj-RIB-in/adj-RIB-out information
in a json format."""
#print "Sent routes:",self.bgp_speaker.neighbor_get(route_type='sent-routes', address=self.neighbor1.get_IP(),
# format='json')
#print '\nReceived-routes:',self.bgp_speaker.neighbor_get(route_type='received-routes',address=self.neighbor1.get_IP(),format='json')
self.prefix_add("10.0.0.0/24", "10.0.0.1")
#print self.get_cool_rib(),"\n\n\n"
def prefix_add(self, prefix, next_hop):
'''``prefix`` must be the string representation of an IP network
(e.g., 10.1.1.0/24).
``next_hop`` specifies the next hop address for this
prefix. This parameter is necessary for only VPNv4 and VPNv6
address families.'''
self.bgp_speaker.prefix_add(prefix, next_hop)
def neighbors_add(self, neighbor):
if isinstance(neighbor, Neighbor):
self.bgp_speaker.neighbor_add(
address=neighbor.get_IP(), #neighbor,
remote_as=neighbor.get_ASN(), #self.neighbor[neighbor]['asn'],
next_hop=neighbor.get_next_hop(), #self.router_next_hop,
is_next_hop_self=True)
else:
print "Object is not the type Neighbor! type:", type(
neighbor), type(Neighbor), neighbor
def get_cool_rib(self):
# from ryu.services.protocols.bgp.api.base import call
# show = {
# 'params': ['rib', 'ipv4'],
# 'format': format
# }
#
# call('operator.show', **show)
from ryu.services.protocols.bgp.operator.internal_api import InternalApi
INTERNAL_API = InternalApi() #_init_log_handler())
# table_manager = self.get_core_service().table_manager
# gtable = table_manager.get_global_table_by_route_family(rf)
return INTERNAL_API.get_single_rib_routes('ipv4')
def update_networks_from_rib(self):
from ryu.services.protocols.bgp.operator.internal_api import InternalApi
INTERNAL_API = InternalApi()
rib_bgp = INTERNAL_API.get_single_rib_routes('ipv4')
print rib_bgp
to_delete = {}
for route in rib_bgp:
prefix = route['prefix']
paths = route['paths']
best_hop = None
list_of_next_hops = []
for index, path in enumerate(paths):
aspath = path['aspath']
if aspath == []:
continue
nexthop = path['nexthop']
list_of_next_hops.append(nexthop)
is_best_route = path['best']
if is_best_route:
best_hop = nexthop
ip = IPNetwork(prefix) # ("172.16.0.0/24")
ip_network = str(ip.network)
# mask_value = ip.prefixlen
# netmask = ip.netmask
#print prefix,'\n\n\n'
if ip_network not in self.networks:
switch = self.neighbor[nexthop]['switch']
port = self.neighbor[nexthop]['port']
controller_ip = None
if aspath == []: # aspath = [] means that this prefix is local
controller_ip = self.local_networks[prefix][
'controller_ip']
else:
controller_ip = self.hosts['neighbors'][nexthop][
'controller_ip']
self.networks[ip_network] = {
'mask': str(ip.netmask),
'controller_ip': controller_ip,
'next_hop': {
nexthop: {
'switch': switch,
'port': port,
'bandwidth': 0,
'congested': 0
}
},
'as_path': aspath,
'best_hop': nexthop
}
else:
best_next_hop = self.networks[ip_network]['best_hop']
if best_hop != best_next_hop:
self.networks[ip_network]['next_hop'][
'best_hop'] = best_hop
if nexthop not in self.networks[ip_network]['next_hop']:
switch = self.neighbor[nexthop]['switch']
port = self.neighbor[nexthop]['port']
controller_ip = None
if aspath == []: # aspath = [] means that this prefix is local
controller_ip = self.local_networks[prefix][
'controller_ip']
else:
controller_ip = self.hosts['neighbors'][nexthop][
'controller_ip']
self.networks[ip_network]['next_hop'][nexthop] = {
'switch': switch,
'port': port,
'bandwidth': 0,
'congested': 0
}
else:
#I dont know if it is necessary to change
pass
self.networks[ip_network]['as_path'] = aspath
ip = IPNetwork(prefix) # ("172.16.0.0/24")
ip_network = str(ip.network)
if ip_network in self.networks:
for nexthop in self.networks[ip_network]['next_hop']:
if nexthop not in list_of_next_hops:
del self.networks[ip_network]['next_hop'][nexthop]
# How it should be:
# networks = {'10.0.2.0': {'controller_ip':"10.0.2.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.2.2": {'switch': 2, 'port': 2,'bandwidth': 0,'congested':0}},'best_hop':"10.0.2.2"},
# '10.0.1.0': {'controller_ip':"10.0.1.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.1.1": {'switch': 2, 'port': 1,'bandwidth': 0,'congested':0}},'best_hop':"10.0.1.1"},
# '172.16.0.0': {'controller_ip':"10.0.1.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.1.1": {'switch': 2, 'port': 1,'bandwidth': 0,'congested':0},
# "10.0.2.2": {'switch': 2, 'port': 2,'bandwidth': 0,'congested':0}},
# 'best_hop': "10.0.1.1"},
# '10.0.254.0': {'controller_ip':"10.0.254.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.254.1": {'switch': 2, 'port': 6,'bandwidth': 0,'congested':0}},'best_hop':"10.0.254.1"}
# }
def peer_down_handler(self, remote_ip, remote_as):
print "peer_down_handler"
self.logger.info('peer down:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
for network in self.networks.keys():
for next_hop in self.networks[network]['next_hop'].keys():
if str(remote_ip) == next_hop:
del self.networks[network]['next_hop'][next_hop]
def peer_up_handler(self, remote_ip, remote_as):
print "peer_up_handler"
self.logger.info('peer up:')
self.logger.info('remote_as: %d', remote_as)
self.logger.info('remote ip: %s', remote_ip)
self.logger.info('')
def best_path_change_handler(self, ev):
print "Best paht changed! ", ev
#self.update_networks_from_rib()
#self.prefix_learned["OI"] = "Path changed!"
self.logger.info('best path changed:')
self.logger.info('remote_as: %d', ev.remote_as)
self.logger.info('route_dist: %s', ev.route_dist)
self.logger.info('prefix: %s', ev.prefix)
self.logger.info('nexthop: %s', ev.nexthop)
self.logger.info('label: %s', ev.label)
self.logger.info('path: %s', ev.path)
self.logger.info('peer: %s %s' %
(ev.path._source, type(ev.path._source)))
self.logger.info('peer ip: %s' % ev.path._source.ip_address)
if True:
return
self.logger.info('Port: %s' %
self.neighbor[ev.path._source.ip_address]['port'])
self.logger.info('is_withdraw: %s', ev.is_withdraw)
self.logger.info('')
"""
ev.path:
data: {'path': Path(Peer(ip: 192.168.25.51, asn: 65501)
peer: Peer(ip: 192.168.25.51, asn: 65501)
NLRI: network layer reachability information. For IPv4 is all about send prefix information.
With other addresses families it can carry other types of information
Received msg from ('10.0.1.51', '46426') << BGPUpdate(len=52,nlri=[BGPNLRI(addr='198.51.100.0',length=24)],path_attributes=[BGPPathAttributeOrigin(flags=64,length=1,type=1,value=0), BGPPathAttributeAsPath(flags=80,length=10,type=2,value=[[65501, 65500]]), BGPPathAttributeNextHop(flags=64,length=4,type=3,value='10.0.1.51')],total_path_attribute_len=25,type=2,withdrawn_routes=[],withdrawn_routes_len=0)
NLRI: BGPNLRI(addr='198.51.100.0',length=24)
Extracted paths from Update msg.:
Path(source: Peer(ip: 10.0.1.51, asn: 65501), nlri: BGPNLRI(addr='198.51.100.0',length=24), source ver#: 1,
path attrs.: {1: BGPPathAttributeOrigin(flags=64,length=1,type=1,value=0),
2: BGPPathAttributeAsPath(flags=80,length=10,type=2,value=[[65501, 65500]]),
3: BGPPathAttributeNextHop(flags=64,length=4,type=3,value='10.0.1.51')}, nexthop: 10.0.1.51, is_withdraw: False)
return ('Path(%s, %s, %s, %s, %s, %s)' % (
self._source, self._nlri, self._source_version_num,
self._path_attr_map, self._nexthop, self._is_withdraw))
Used to pass an update on any best remote path to
best_path_change_handler.
================ ======================================================
Attribute Description
================ ======================================================
remote_as The AS number of a peer that caused this change
route_dist None in the case of IPv4 or IPv6 family
prefix A prefix was changed
nexthop The nexthop of the changed prefix
label MPLS label for VPNv4, VPNv6 or EVPN prefix
path An instance of ``info_base.base.Path`` subclass
is_withdraw True if this prefix has gone otherwise False
================ ======================================================
"""
print "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nCreate a rule for %s with next hop %s and port %s" % (
ev.prefix, ev.nexthop,
self.neighbor[ev.path._source.ip_address]['port'])
print "AS path:", ev.path
print "AS path attributes:", ev.path._path_attr_map
print "AS path attributes, AS_Path:", ev.path.get_pattr(
bgp.BGP_ATTR_TYPE_AS_PATH)
print "AS path attributes, AS_Path value:", ev.path.get_pattr(
bgp.BGP_ATTR_TYPE_AS_PATH).value
# Check if the prefix already has been learned
if ev.prefix not in self.prefix_learned:
ip = IPNetwork(ev.prefix) #("172.16.0.0/24")
#print ip.network, ip.prefixlen???
switch = self.neighbor[ev.path._source.ip_address]['switch']
port = self.neighbor[ev.path._source.ip_address]['port']
as_path = ev.path.get_pattr(bgp.BGP_ATTR_TYPE_AS_PATH).value
self.prefix_learned[ev.prefix] = {
'next_hop': {
ev.nexthop: {
'switch': switch,
'port': port,
'as_path': as_path,
'neighbor': ev.path._source.ip_address
}
}
}
else:
switch = self.neighbor[ev.path._source.ip_address]['switch']
port = self.neighbor[ev.path._source.ip_address]['port']
as_path = ev.path.get_pattr(bgp.BGP_ATTR_TYPE_AS_PATH).value
if ev.nexthop not in self.prefix_learned[ev.prefix]['next_hop']:
self.prefix_learned[ev.prefix]['next_hop'] = {
ev.nexthop: {
'switch': switch,
'port': port,
'as_path': as_path,
'neighbor': ev.path._source.ip_address
}
}
else:
self.prefix_learned[ev.prefix]['next_hop'][ev.nexthop] = {
'switch': switch,
'port': port,
'as_path': as_path,
'neighbor': ev.path._source.ip_address
}
#{'172.16.0.0/24': {'paths': [[65001, 65501]], 'next_hop': '10.0.1.1', 'port': 1, 'neighbor': '10.0.1.1'}}"
#How it should be:
# networks = {'10.0.2.0': {'controller_ip':"10.0.2.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.2.2": {'switch': 2, 'port': 2,'bandwidth': 0,'congested':0}},'best_hop':"10.0.2.2"},
# '10.0.1.0': {'controller_ip':"10.0.1.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.1.1": {'switch': 2, 'port': 1,'bandwidth': 0,'congested':0}},'best_hop':"10.0.1.1"},
# '172.16.0.0': {'controller_ip':"10.0.1.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.1.1": {'switch': 2, 'port': 1,'bandwidth': 0,'congested':0},
# "10.0.2.2": {'switch': 2, 'port': 2,'bandwidth': 0,'congested':0}},
# 'best_hop': "10.0.1.1"},
# '10.0.254.0': {'controller_ip':"10.0.254.254",'mask': '255.255.255.0',
# 'next_hop': {"10.0.254.1": {'switch': 2, 'port': 6,'bandwidth': 0,'congested':0}},'best_hop':"10.0.254.1"}
# }
# self.prefix_learned[ev.prefix]['next_hop'] = ev.nexthop
# self.prefix_learned[ev.prefix]['neighbor'] = ev.path._source.ip_address
# self.prefix_learned[ev.prefix]["port"] = self.neighbor[ev.path._source.ip_address]['port'],
# self.prefix_learned[ev.prefix]['paths'] += ev.path.get_pattr(bgp.BGP_ATTR_TYPE_AS_PATH).value
# The result self.prefix_learned:
# {'172.16.0.0/24': {'paths': [[65001]], 'next_hop': '192.168.25.101', 'port': 1, 'neighbor': '192.168.25.101'}}
if ev.is_withdraw: # Remove prefix that is withdraw
ip = IPNetwork(ev.prefix) # ("172.16.0.0/24")
ip_network = str(ip.network)
next_hop = ev.nexthop
command += '/super/noreturn'
command += ' 2> /dev/null'
return command
class bgpevent(event.EventBase):
def __init__(self,ev):
self.remote_as = ev.remote_as
self.prefix = ev.prefix
self.nexthop = ev.nexthop
#self.is_withdraw = ev.is_withdraw
if __name__=="__main__":
speaker = BGPSpeaker(as_number=20,router_id='1.1.1.2',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down
)
#speaker.neighbor_add("10.108.90.1",10)
speaker.neighbor_add("10.108.91.1",30)
speaker.neighbor_add("10.108.92.1",10)
print 111111
print speaker.rib_get()
print 222222
#speaker.neighbor_add("10.108.91.1",30)
#uncomment the below line if the speaker needs to talk with a bmp server
def __init__(self, hosts=None, networks=None, *args, **kwargs):
super(BGP_Speaker, self).__init__(*args, **kwargs)
self.networks = networks
self.hosts = hosts
# Configuring AS 65501:
self.as_number = 65001
#self.remote_as = 65501
self.router_id = '192.168.25.7'
self.router_next_hop = "10.0.254.254" # The source IP of the BGP
self.listen_port = 179
self.bgp_speaker = \
BGPSpeaker(self.as_number,
self.router_id,
bgp_server_port=self.listen_port,
best_path_change_handler=self.best_path_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
# print "<<<<<<<<<",self.bgp_speaker
# speaker = BGPSpeaker(as_number=65001, router_id='192.168.25.7',
# best_path_change_handler=dump_remote_best_path_change,
# peer_down_handler=detect_peer_down)
self.neighbor1 = Neighbor(ip="192.168.25.2",
asn=65002,
next_hop="10.0.1.254",
border_switch=2,
sw_port=1,
controller_ip="10.0.1.254")
#self.neighbor2 = Neighbor(ip="10.0.2.2", asn=65002,next_hop="10.0.1.254", border_switch=2, sw_port=2, controller_ip="10.0.1.254")
# self.neighbor = {"10.0.1.1": {'asn': 65001,'switch':2, 'port': 1,'controller_ip':"10.0.1.254"},
# "10.0.2.2": {'asn': 65002,'switch':2, 'port': 2,'controller_ip':"10.0.2.254"},
# }
self.neighbors = [self.neighbor1] #,self.neighbor2]
#self.local_networks = {"192.168.2.0/24":{'controller_ip':"192.168.2.254"}}
self.prefix_add(prefix="192.168.2.0/24", next_hop="192.168.2.254")
# Adding neighbors:
#TODO: Verify the option of next_hop
for neighbor in self.neighbors:
# self.bgp_speaker.neighbor_add(address=neighbor, remote_as=self.neighbor[neighbor]['asn'],
# next_hop=self.router_next_hop,
# is_next_hop_self=True)
self.neighbors_add(neighbor)
# for network in self.local_networks:
# # Adding prefixes:
# self.bgp_speaker.prefix_add(network, self.neighbor[neighbor]['controller_ip']) # next_hop (how to reach the network)
# #self.bgp_speaker.prefix_add("192.168.2.0/24", "10.0.2.254") # next_hop (how to reach the network)
# # self.bgp_speaker.prefix_add("10.0.0.0/24", "10.0.1.1")
# "10.0.3.1": 'fe:00:00:00:00:03'}
# self.arp_controller = '00:00:00:00:00:fe'
# self.monitor_thread = hub.spawn(self._monitor)
# self.best_paths ={}
self.prefix_learned = {} # "198.51.100.0/24",'10.0.1.0/24'}
self.is_load_balancer_active = False
self.load_balancer = {}
#self.monitor_thread = hub.spawn(self.stand_alone)
print "BGP Speaker started! ;)"
self.stand_alone()
def dump_remote_best_path_change(event):
prefix = {"remote_as": event.remote_as, "prefix": event.prefix, "nexthop": event.nexthop}
prefix_list.append(prefix)
print "the best path changed:", event.remote_as, event.prefix, event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print "Peer down:", remote_ip, remote_as
if __name__ == "__main__":
speaker = BGPSpeaker(
as_number=65000,
router_id="172.0.255.254",
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down,
)
speaker.neighbor_add("172.0.0.1", 65000, enable_ipv4=True, enable_vpnv4=True, is_next_hop_self=True)
speaker.neighbor_add("172.0.0.2", 65000, enable_ipv4=True, enable_vpnv4=True, is_next_hop_self=True)
speaker.neighbor_add("172.0.0.3", 65000, enable_ipv4=True, enable_vpnv4=True, is_next_hop_self=True)
# uncomment the below line if the speaker needs to talk with a bmp server.
# speaker.bmp_server_add('192.168.177.2', 11019)
count = 1
i_prefix_list = True
while True:
eventlet.sleep(5)
print prefix_list
if i_prefix_list:
for prefix in prefix_list:
null = ''
true = 'True'
false = 'False'
Flag = False
status_bgp = speaker.neighbor_state_get()
status = json.loads(status_bgp)
for key in status.keys():
if status[key]['info']['bgp_state'] != 'Established':
logging.info('neighbor is abornamal .please check peer {}'.format(key))
Flag = True
return Flag
if __name__ == "__main__":
speaker = BGPSpeaker(as_number=100, router_id='10.0.0.82',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
speaker.neighbor_add('10.0.0.81', 100)
# uncomment the below line if the speaker needs to talk with a bmp server.
# speaker.bmp_server_add('192.168.177.2', 11019)
time.sleep(5)
while True:
print(datetime.datetime.now())
if (get_bgp_status()):
logging.warning("~~~~~~~~~~~~~~~~~~~~~")
db_from_bgp.clear()
else:
compare_db()
eventlet.sleep(6)
class RyuBGPSpeaker(RyuApp):
def __init__(self, *args, **kwargs):
super(RyuBGPSpeaker, self).__init__(*args, **kwargs)
self.config_file = CONF.config_file
# BGPSpeaker instance (not instantiated yet)
self.speaker = None
def start(self):
super(RyuBGPSpeaker, self).start()
# If configuration file was provided and loaded successfully, we start
# BGPSpeaker using the given settings.
# If no configuration file is provided or if any minimum required
# setting is missing, BGPSpeaker will not be started.
if self.config_file:
LOG.debug('Loading config file %s...', self.config_file)
settings = load_config(self.config_file)
# Configure logging settings, if available.
if hasattr(settings, 'LOGGING'):
# Not implemented yet.
LOG.debug('Loading LOGGING settings... (NOT implemented yet)')
# from logging.config import dictConfig
# logging_settings = dictConfig(settings.LOGGING)
# Configure BGP settings, if available.
if hasattr(settings, 'BGP'):
LOG.debug('Loading BGP settings...')
self._start_speaker(settings.BGP)
# Configure SSH settings, if available.
if hasattr(settings, 'SSH'):
LOG.debug('Loading SSH settings...')
hub.spawn(SSH_CLI_CONTROLLER.start, **settings.SSH)
# Start RPC server with the given RPC settings.
rpc_settings = {
NC_RPC_BIND_PORT: CONF.rpc_port,
NC_RPC_BIND_IP: validate_rpc_host(CONF.rpc_host),
}
return hub.spawn(NET_CONTROLLER.start, **rpc_settings)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Settings for starting BGPSpeaker
bgp_settings = {}
# Get required settings.
try:
bgp_settings['as_number'] = settings.get(LOCAL_AS)
bgp_settings['router_id'] = settings.get(ROUTER_ID)
except KeyError as e:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % e)
# Get optional settings.
bgp_settings[BGP_SERVER_PORT] = settings.get(BGP_SERVER_PORT,
DEFAULT_BGP_SERVER_PORT)
bgp_settings[REFRESH_STALEPATH_TIME] = settings.get(
REFRESH_STALEPATH_TIME, DEFAULT_REFRESH_STALEPATH_TIME)
bgp_settings[REFRESH_MAX_EOR_TIME] = settings.get(
REFRESH_MAX_EOR_TIME, DEFAULT_REFRESH_MAX_EOR_TIME)
bgp_settings[LABEL_RANGE] = settings.get(LABEL_RANGE,
DEFAULT_LABEL_RANGE)
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
self.speaker = BGPSpeaker(**bgp_settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(settings.get('neighbors', []))
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(settings.get('vrfs', []))
# Add Networks
LOG.debug('Adding routes...')
self._add_routes(settings.get('routes', []))
def _add_neighbors(self, settings):
"""
Add BGP neighbors from the given settings.
All valid neighbors are loaded.
Miss-configured neighbors are ignored and errors are logged.
"""
for neighbor_settings in settings:
LOG.debug('Adding neighbor settings: %s', neighbor_settings)
try:
self.speaker.neighbor_add(**neighbor_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_vrfs(self, settings):
"""
Add BGP VRFs from the given settings.
All valid VRFs are loaded.
Miss-configured VRFs are ignored and errors are logged.
"""
for vrf_settings in settings:
LOG.debug('Adding VRF settings: %s', vrf_settings)
try:
self.speaker.vrf_add(**vrf_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_routes(self, settings):
"""
Add BGP routes from given settings.
All valid routes are loaded.
Miss-configured routes are ignored and errors are logged.
"""
for route_settings in settings:
if 'prefix' in route_settings:
prefix_add = self.speaker.prefix_add
elif 'route_type' in route_settings:
prefix_add = self.speaker.evpn_prefix_add
else:
LOG.debug('Skip invalid route settings: %s', route_settings)
continue
LOG.debug('Adding route settings: %s', route_settings)
try:
prefix_add(**route_settings)
except RuntimeConfigError as e:
LOG.exception(e)
class RyuBGPSpeaker(RyuApp):
"""
Base application for implementing BGP applications.
This application will notifies
- ``EventBestPathChanged``
- ``EventPeerDown``
- ``EventPeerUp``
to other BGP applications.
To catch these events, specify ``@set_ev_cls()`` decorator to the event
handlers in the Ryu applications.
Example::
...
from ryu.base import app_manager
from ryu.controller.handler import set_ev_cls
from ryu.services.protocols.bgp import application as bgp_application
...
class MyBGPApp(app_manager.RyuApp):
_CONTEXTS = {
'ryubgpspeaker': bgp_application.RyuBGPSpeaker,
}
...
@set_ev_cls(bgp_application.EventBestPathChanged)
def _best_patch_changed_handler(self, ev):
self.logger.info(
'Best path changed: is_withdraw=%s, path=%s',
ev.is_withdraw, ev.path)
"""
_EVENTS = [
EventBestPathChanged,
EventPeerDown,
EventPeerUp,
]
def __init__(self, *args, **kwargs):
super(RyuBGPSpeaker, self).__init__(*args, **kwargs)
self.config_file = CONF.config_file
# BGPSpeaker instance (not instantiated yet)
self.speaker = None
def start(self):
super(RyuBGPSpeaker, self).start()
# If configuration file was provided and loaded successfully, we start
# BGPSpeaker using the given settings.
# If no configuration file is provided or if any minimum required
# setting is missing, BGPSpeaker will not be started.
if self.config_file:
LOG.debug('Loading config file %s...', self.config_file)
settings = load_config(self.config_file)
# Configure logging settings, if available.
if hasattr(settings, 'LOGGING'):
# Not implemented yet.
LOG.debug('Loading LOGGING settings... (NOT implemented yet)')
# from logging.config import dictConfig
# logging_settings = dictConfig(settings.LOGGING)
# Configure BGP settings, if available.
if hasattr(settings, 'BGP'):
LOG.debug('Loading BGP settings...')
self._start_speaker(settings.BGP)
# Configure SSH settings, if available.
if hasattr(settings, 'SSH'):
LOG.debug('Loading SSH settings...')
# Note: paramiko used in bgp.operator.ssh is the optional
# requirements, imports bgp.operator.ssh here.
from ryu.services.protocols.bgp.operator import ssh
hub.spawn(ssh.SSH_CLI_CONTROLLER.start, **settings.SSH)
# Start RPC server with the given RPC settings.
rpc_settings = {
NC_RPC_BIND_PORT: CONF.rpc_port,
NC_RPC_BIND_IP: validate_rpc_host(CONF.rpc_host),
}
return hub.spawn(NET_CONTROLLER.start, **rpc_settings)
def _start_speaker(self, settings):
"""
Starts BGPSpeaker using the given settings.
"""
# Check required settings.
_required_settings = (
LOCAL_AS,
ROUTER_ID,
)
for required in _required_settings:
if required not in settings:
raise ApplicationException(
desc='Required BGP configuration missing: %s' % required)
# Set event notify handlers if no corresponding handler specified.
settings.setdefault(
'best_path_change_handler', self._notify_best_path_changed_event)
settings.setdefault(
'peer_down_handler', self._notify_peer_down_event)
settings.setdefault(
'peer_up_handler', self._notify_peer_up_event)
# Pop settings other than creating BGPSpeaker instance.
neighbors_settings = settings.pop('neighbors', [])
vrfs_settings = settings.pop('vrfs', [])
routes_settings = settings.pop('routes', [])
# Create BGPSpeaker instance.
LOG.debug('Starting BGPSpeaker...')
settings.setdefault('as_number', settings.pop(LOCAL_AS))
self.speaker = BGPSpeaker(**settings)
# Add neighbors.
LOG.debug('Adding neighbors...')
self._add_neighbors(neighbors_settings)
# Add VRFs.
LOG.debug('Adding VRFs...')
self._add_vrfs(vrfs_settings)
# Add routes
LOG.debug('Adding routes...')
self._add_routes(routes_settings)
def _notify_best_path_changed_event(self, ev):
ev = EventBestPathChanged(ev.path, ev.is_withdraw)
self.send_event_to_observers(ev)
def _notify_peer_down_event(self, remote_ip, remote_as):
ev = EventPeerDown(remote_ip, remote_as)
self.send_event_to_observers(ev)
def _notify_peer_up_event(self, remote_ip, remote_as):
ev = EventPeerUp(remote_ip, remote_as)
self.send_event_to_observers(ev)
def _add_neighbors(self, settings):
"""
Add BGP neighbors from the given settings.
All valid neighbors are loaded.
Miss-configured neighbors are ignored and errors are logged.
"""
for neighbor_settings in settings:
LOG.debug('Adding neighbor settings: %s', neighbor_settings)
try:
self.speaker.neighbor_add(**neighbor_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_vrfs(self, settings):
"""
Add BGP VRFs from the given settings.
All valid VRFs are loaded.
Miss-configured VRFs are ignored and errors are logged.
"""
for vrf_settings in settings:
LOG.debug('Adding VRF settings: %s', vrf_settings)
try:
self.speaker.vrf_add(**vrf_settings)
except RuntimeConfigError as e:
LOG.exception(e)
def _add_routes(self, settings):
"""
Add BGP routes from given settings.
All valid routes are loaded.
Miss-configured routes are ignored and errors are logged.
"""
for route_settings in settings:
if 'prefix' in route_settings:
prefix_add = self.speaker.prefix_add
elif 'route_type' in route_settings:
prefix_add = self.speaker.evpn_prefix_add
elif 'flowspec_family' in route_settings:
prefix_add = self.speaker.flowspec_prefix_add
else:
LOG.debug('Skip invalid route settings: %s', route_settings)
continue
LOG.debug('Adding route settings: %s', route_settings)
try:
prefix_add(**route_settings)
except RuntimeConfigError as e:
LOG.exception(e)
class SDNIPSApp(app_manager.RyuApp):
OFP_VERSIONS = [ofproto_v1_0.OFP_VERSION]
_CONTEXTS = {'wsgi': WSGIApplication}
def __init__(self, *args, **kwargs):
super(SDNIPSApp, self).__init__(*args, **kwargs)
self.net = nx.DiGraph()
wsgi = kwargs['wsgi']
wsgi.register(SDNIPSWSGIApp, {myapp_name: self})
self.eline_map = {}
self.bgp_config = {}
self.bgp_speaker = None
self.rcv_prefixes = []
self.flows = {}
self.contention_vrf = {}
self.quarantine = {}
load_config_thread = Thread(target=self.load_config, args=())
load_config_thread.start()
def __exit__(self, exc_type, exc_value, traceback):
for prefix in self.rcv_prefixes:
os.system('/sbin/ip route del %s' % prefix)
def load_config(self):
try:
with open('sdn-ips-config.json', 'r') as fp:
data = jsonpickle.decode(fp.read())
except Exception as e:
print "Fail to load SDN-IPS config. Error: %s" % (e)
return
retry = 0
sleep(15)
while set(data['nodes']) != set(self.net.nodes()) and retry < 10:
print "Nodes are missing or topology is different! Trying in 15s.."
sleep(15)
retry += 1
if retry == 10:
print "Could not load config because some nodes are missing or topology is different!"
return
# Reinstall flows
for dpid in data.get('flows', []):
for flow in data['flows'][dpid]:
dp = self.net.node[int(dpid)]['conn']
self.add_flow(dp, flow['priority'], flow['match'],
flow['actions'])
# Recreate BGP speaker
if 'as_number' in data['bgp'] and 'router_id' in data['bgp']:
self.bgp_create(data['bgp']['as_number'],
str(data['bgp']['router_id']))
for neigh in data['bgp'].get('neighbors', []):
neigh['address'] = str(neigh['address'])
self.bgp_add_neighbor(**neigh)
for prefix in data['bgp'].get('adv_prefixes', []):
self.bgp_add_prefix(str(prefix))
# save contention VRF
self.contention_vrf = data['contention_vrf']
def persist_config(self):
data = {}
# Topology information
data['nodes'] = self.net.nodes()
# BGP config
data['bgp'] = self.bgp_config
# OpenFlow rules
data['flows'] = self.flows
# Contention VRF
data['contention_vrf'] = self.contention_vrf
try:
with open('sdn-ips-config.json', 'w') as fp:
fp.write(jsonpickle.encode(data))
except Exception as e:
print "Fail to save SDN-IPS config! Error: %s" % (e)
@set_ev_cls(dpset.EventDP, dpset.DPSET_EV_DISPATCHER)
def datapath_handler(self, ev):
ofproto = ev.dp.ofproto
if ev.enter:
ports = {}
for p in ev.ports:
if p.port_no != ofproto.OFPP_LOCAL:
ports[p.port_no] = {'name': p.name, 'hw_addr': p.hw_addr}
self.net.add_node(ev.dp.id, **{'ports': ports, 'conn': ev.dp})
print 'OFPStateChange switch entered: dpid=%s' % (
dpid_lib.dpid_to_str(ev.dp.id))
else:
print 'OFPStateChange switch leaves: dpid=%s' % (
dpid_lib.dpid_to_str(ev.dp.id))
self.net.remove_node(ev.dp.id)
topo_events = [
event.EventSwitchEnter, event.EventPortAdd, event.EventLinkAdd
]
@set_ev_cls(topo_events)
def get_topology_data(self, ev):
switch_list = get_switch(self, None)
links_list = get_link(self, None)
links = []
for link in links_list:
# check for unwanted nodes and links
if link.src.dpid not in self.net.nodes(
) or link.dst.dpid not in self.net.nodes():
continue
if self.net.has_edge(link.src.dpid, link.dst.dpid):
continue
links.append((link.src.dpid, link.dst.dpid, {
'sport': link.src.port_no,
'dport': link.dst.port_no
}))
if not links:
return
print "Update graph edges:"
for l in links:
print "==> %s:%d <-> %s:%d" % (dpid_lib.dpid_to_str(
l[0]), l[2]['sport'], dpid_lib.dpid_to_str(
l[1]), l[2]['dport'])
self.net.add_edges_from(links)
@set_ev_cls(ofp_event.EventOFPSwitchFeatures, CONFIG_DISPATCHER)
def switch_features_handler(self, ev):
datapath = ev.msg.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
# invalidate all previews rules
clear = parser.OFPFlowMod(datapath=datapath,
command=ofproto.OFPFC_DELETE)
datapath.send_msg(clear)
# install table-miss flow entry
match = {}
actions = [parser.OFPActionOutput(ofproto.OFPP_CONTROLLER)]
self.add_flow(datapath, 65530, match, actions, visible=False)
@set_ev_cls(ofp_event.EventOFPPacketIn, MAIN_DISPATCHER)
def _packet_in_handler(self, ev):
msg = ev.msg
dpid = msg.datapath.id
pkt = packet.Packet(msg.data)
eth_pkt = pkt.get_protocol(ethernet.ethernet)
if eth_pkt.ethertype == ether_types.ETH_TYPE_LLDP:
return
ip_pkt = pkt.get_protocol(ipv4.ipv4)
if ip_pkt and str(ip_pkt.src) in self.quarantine:
vlan_pkt = pkt.get_protocol(vlan.vlan)
vlan_id = 0
if vlan_pkt:
vlan_id = vlan_pkt.vid
if vlan_id not in self.eline_map:
print "Error: packet received from an infected host but with wrong vlanid"
return
redirect_to = self.quarantine[str(ip_pkt.src)]
self.contention_quarantine_redirect(msg.datapath, ip_pkt,
redirect_to, vlan_id)
return
print "PacketIn dpid=%s inport=%s src=%s dst=%s ethertype=0x%04x" % \
(dpid, msg.in_port, eth_pkt.src, eth_pkt.dst, eth_pkt.ethertype)
def get_access_ports(self, sw):
if sw not in self.net.nodes():
return None
ports = self.net.node[sw]['ports'].keys()
for e in self.net.edge[sw]:
ports.remove(self.net.edge[sw][e]['sport'])
return ports
def add_flow(self,
datapath,
priority,
match,
actions,
idle_timeout=0,
visible=True):
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
match_ofp = self.build_match(datapath, **match)
mod = parser.OFPFlowMod(datapath=datapath,
priority=priority,
idle_timeout=idle_timeout,
match=match_ofp,
actions=actions)
datapath.send_msg(mod)
if visible:
self.flows.setdefault(datapath.id, [])
self.flows[datapath.id].append({
'match': match,
'priority': priority,
'actions': actions
})
self.persist_config()
def build_match(self,
datapath,
in_port=0,
dl_type=0,
dl_src=0,
dl_dst=0,
dl_vlan=0,
nw_src=0,
src_mask=32,
nw_dst=0,
dst_mask=32,
nw_proto=0,
nw_tos=None,
tp_src=0,
tp_dst=0):
ofp = datapath.ofproto
ofp_parser = datapath.ofproto_parser
# Match
nw_tos = 0
wildcards = ofp.OFPFW_ALL
if in_port:
wildcards &= ~ofp.OFPFW_IN_PORT
if dl_type:
wildcards &= ~ofp.OFPFW_DL_TYPE
if dl_src:
wildcards &= ~ofp.OFPFW_DL_SRC
if dl_dst:
wildcards &= ~ofp.OFPFW_DL_DST
if dl_vlan:
wildcards &= ~ofp.OFPFW_DL_VLAN
if nw_tos:
wildcards &= ~ofp.OFPFW_NW_TOS
if nw_src:
v = (32 - src_mask) << ofp.OFPFW_NW_SRC_SHIFT | \
~ofp.OFPFW_NW_SRC_MASK
wildcards &= v
if nw_dst:
v = (32 - dst_mask) << ofp.OFPFW_NW_DST_SHIFT | \
~ofp.OFPFW_NW_DST_MASK
wildcards &= v
if nw_proto:
wildcards &= ~ofp.OFPFW_NW_PROTO
if tp_src:
wildcards &= ~ofp.OFPFW_TP_SRC
if tp_dst:
wildcards &= ~ofp.OFPFW_TP_DST
match = ofp_parser.OFPMatch(wildcards, in_port, dl_src, dl_dst,
dl_vlan, 0, dl_type, nw_tos, nw_proto,
nw_src, nw_dst, tp_src, tp_dst, src_mask,
dst_mask)
return match
def create_eline(self, uniA_sw, uniA_port, uniB_sw, uniB_port, vlanid):
# sanity check
if vlanid in self.eline_map:
return (
False,
"E-line already exists with the same vlan_id! Choose another vlanid"
)
path = nx.shortest_path(self.net, uniA_sw, uniB_sw)
print "==> create_eline(UNI-A=%s:%s, UNI-B=%s:%s, vlanid=%d): %s" % \
(uniA_sw, uniA_port, uniB_sw, uniB_port, vlanid, path)
for i in range(len(path)):
sw = path[i]
buff_id = None
if i == 0: # first switch
match_in_port = uniA_port
else:
prev_sw = path[i - 1]
match_in_port = self.net.edge[prev_sw][sw]['dport']
if i == len(path) - 1:
action_out_port = uniB_port
else:
next_sw = path[i + 1]
action_out_port = self.net.edge[sw][next_sw]['sport']
dp = self.net.node[sw]['conn']
# uniA -> uniB
self.logger.info(
"==> add_flow sw=%s (->) in_port=%s vlanid=%d action_out_port=%s",
sw, match_in_port, vlanid, action_out_port)
match = {'in_port': match_in_port, 'dl_vlan': vlanid}
actions = [dp.ofproto_parser.OFPActionOutput(action_out_port)]
self.add_flow(dp, 65533, match, actions)
# uniB -> uniA
match_in_port, action_out_port = action_out_port, match_in_port
self.logger.info(
"==> add_flow sw=%s (<-) in_port=%s vlanid=%d action_out_port=%s",
sw, match_in_port, vlanid, action_out_port)
match = {'in_port': match_in_port, 'dl_vlan': vlanid}
actions = [dp.ofproto_parser.OFPActionOutput(action_out_port)]
self.add_flow(dp, 65533, match, actions)
uniA_bkbport = self.net.edge[uniA_sw][path[1]]['sport']
uniB_bkbport = self.net.edge[path[-2]][uniB_sw]['dport']
self.eline_map.setdefault(vlanid, {})
self.eline_map[vlanid][uniA_sw] = {
'access_port': uniA_port,
'bkb_port': uniA_bkbport
}
self.eline_map[vlanid][uniB_sw] = {
'access_port': uniB_port,
'bkb_port': uniB_bkbport
}
return (True, 'Success')
def bgp_create(self, as_number, router_id):
# MUDAR AQUI - INICIO
try:
self.bgp_speaker = BGPSpeaker(
as_number=as_number,
router_id=router_id,
best_path_change_handler=self.best_path_change_handler,
adj_rib_in_change_handler=self.adj_rib_in_change_handler,
peer_down_handler=self.peer_down_handler,
peer_up_handler=self.peer_up_handler)
except Exception as e:
print "Error creating bgp speaker: %s" % (e)
return (False, 'Failed to create BGP speaker')
# MUDAR AQUI - FIM
self.bgp_config['as_number'] = as_number
self.bgp_config['router_id'] = router_id
self.bgp_config['neighbors'] = []
self.bgp_config['adv_prefixes'] = []
self.persist_config()
return (True, 'Success')
def bgp_add_neighbor(self,
address,
remote_as,
enable_ipv4=True,
enable_ipv6=False,
enable_ipv4fs=False,
enable_ipv6fs=False):
# MUDAR AQUI - INICIO
try:
self.bgp_speaker.neighbor_add(address,
remote_as,
enable_ipv4=enable_ipv4,
enable_ipv6=enable_ipv6,
enable_ipv4fs=enable_ipv4fs,
enable_ipv6fs=enable_ipv6fs)
except Exception as e:
print "Error on bgp_add_neighbor: %s" % (e)
return (False, 'Failed to add BGP neighbor')
# MUDAR AQUI - FIM
self.bgp_config['neighbors'].append({
'address': address,
'remote_as': remote_as,
'enable_ipv4': enable_ipv4,
'enable_ipv6': enable_ipv6,
'enable_ipv4fs': enable_ipv4fs,
'enable_ipv6fs': enable_ipv6fs
})
self.persist_config()
return (True, 'Success')
def bgp_add_prefix(self, prefix):
# MUDAR AQUI - INICIO
try:
self.bgp_speaker.prefix_add(prefix)
except Exception as e:
print "Error on bgp_add_prefix: %s" % (e)
return (False, 'Failed to add prefix')
# MUDAR AQUI - FIM
self.bgp_config['adv_prefixes'].append(prefix)
self.persist_config()
return (True, 'Success')
def best_path_change_handler(self, event):
action = 'del' if event.is_withdraw else 'add'
print 'the best path changed: remote-as=%s prefix=%s next-hop=%s action=%s' % \
(event.remote_as, event.prefix, event.nexthop, action)
os.system('/sbin/sysctl net.ipv4.ip_forward=1')
os.system('/sbin/ip route %s %s via %s' %
(action, event.prefix, event.nexthop))
if event.is_withdraw:
try:
self.rcv_prefixes.remove(event.prefix)
except:
pass
else:
self.rcv_prefixes.append(event.prefix)
def adj_rib_in_change_handler(self, event, peer_ip, peer_asn):
if isinstance(event.path, (IPv4FlowSpecPath, IPv6FlowSpecPath)):
#print "formatted_nlri=%s" % (event.path.nlri.formatted_nlri_str)
#print "path=%s" % (event.path)
#print "pattrs=%s" % (event.path.pathattr_map)
extcomm = event.path.get_pattr(
bgp.BGP_ATTR_TYPE_EXTENDED_COMMUNITIES, [])
if extcomm:
extcomm = extcomm.communities
#print "BGPExtendedCommunities=%s" % (extcomm)
self.bgp_update_flowspec(event.path.nlri.rules, extcomm)
def bgp_update_flowspec(self, nlri_rules, extcomm):
matches = {}
for rule in nlri_rules:
if isinstance(rule, bgp.FlowSpecDestPrefix):
matches['nw_dst'] = rule.addr
matches['dst_mask'] = rule.length
elif isinstance(rule, bgp.FlowSpecSrcPrefix):
matches['nw_src'] = rule.addr
matches['src_mask'] = rule.length
elif isinstance(rule, bgp.FlowSpecIPProtocol):
matches['nw_proto'] = rule.value
elif isinstance(rule, bgp.FlowSpecPort):
#TODO: since openflow rules does not have an operator to OR (dst port
# or src port), then we should create two rules: one for src port and
# other for dst port
pass
elif isinstance(rule, bgp.FlowSpecDestPort):
matches['tp_dst'] = rule.value
elif isinstance(rule, bgp.FlowSpecSrcPort):
matches['tp_src'] = rule.value
print "matches: %s" % (matches)
actions = {}
for c in extcomm:
if isinstance(c, bgp.BGPFlowSpecTrafficRateCommunity):
if c.rate_info > 0.0:
actions['rate-limit'] = c.rate_info
# TODO: implement rate-limit when QoS queues is available
else:
actions['discard'] = True
# TODO: make use of the other matches attributes such as tp_dst, proto,...
self.contention_block(matches['nw_src'])
elif isinstance(c, bgp.BGPFlowSpecRedirectCommunity):
rtcomm = "%d:%d" % (c.as_number, c.local_administrator)
nexthop = self.contention_vrf.get(rtcomm, None)
if nexthop:
actions['redirect-to-nexthop'] = nexthop
# TODO: make use of the other matches attributes such as tp_dst, proto,...
self.contention_quarantine(matches['nw_src'], nexthop)
print "actions: %s" % (actions)
def peer_down_handler(self, remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
def peer_up_handler(self, remote_ip, remote_as):
print 'Peer up:', remote_ip, remote_as
def flow_create_mirror(self, dpid, flow, to_port):
try:
dp = self.net.node[dpid]['conn']
except:
return (False, 'dpid not found!')
parser = dp.ofproto_parser
new_action = parser.OFPActionOutput(to_port)
# check if the port is already on flow actions, and just return
# in this case since we have nothing to do
if new_action in flow['actions']:
return (True, 'Success - to_port already in flow actions')
flow['actions'].append(new_action)
try:
match_ofp = self.build_match(dp, **flow['match'])
mod = parser.OFPFlowMod(datapath=dp,
priority=flow['priority'],
command=dp.ofproto.OFPFC_MODIFY_STRICT,
match=match_ofp,
actions=flow['actions'])
dp.send_msg(mod)
except Exception as e:
return (False, 'Error installing flow_mod: %s' % (e))
return (True, 'Success')
def flows_create_mirror(self, dpid, flows, target_sw, target_port):
try:
path = nx.shortest_path(self.net, dpid, target_sw)
except:
return (
False,
'Failed to create mirror! Could not find a path from %s to %s'
%
(dpid_lib.dpid_to_str(dpid), dpid_lib.dpid_to_str(target_sw)))
# determine the first output port for remote mirroring
if len(path) == 1:
return (
False,
'Failed to create mirror. Currently we dont support mirror to the same switch'
)
# for the first switch, we just modify the openflow rules adding a new action
# to output the traffic to the next switch (remote mirroring)
next_sw = path[1]
first_port = self.net.edge[dpid][next_sw]['sport']
for flow in flows:
self.flow_create_mirror(dpid, flow, first_port)
for i in range(1, len(path)):
sw = path[i]
dp = self.net.node[sw]['conn']
prev_sw = path[i - 1]
match_in_port = self.net.edge[prev_sw][sw]['dport']
actions = []
if i == len(path) - 1:
action_out_port = target_port
actions.append(
dp.ofproto_parser.OFPActionSetDlDst(
mac.haddr_to_bin('ff:ff:ff:ff:ff:ff')))
else:
next_sw = path[i + 1]
action_out_port = self.net.edge[sw][next_sw]['sport']
match = {'in_port': match_in_port}
actions.append(dp.ofproto_parser.OFPActionOutput(action_out_port))
self.add_flow(dp, 65533, match, actions)
return (True, 'Success')
# contention_add_vrf(rtcomm, nexthop)
# - rtcomm: Route-Target Community, describes the VRF
# - nexthop: ipv4 address which will be used for redirect
#
# Add a fake VRF which will be used just for traffic
# redirection to a nexthop. Usefull for FlowSpec redirect
# action, since draft-simpson-idr-flowspec-redirect-02 is
# not yet avaliable
def contention_add_vrf(self, rtcomm, nexthop):
self.contention_vrf[rtcomm] = nexthop
self.persist_config()
return (True, 'Success')
def contention_quarantine(self, ipaddr, redirect_to):
for sw in self.net.nodes():
dp = self.net.node[sw]['conn']
actions = [
dp.ofproto_parser.OFPActionOutput(dp.ofproto.OFPP_CONTROLLER)
]
for port in self.get_access_ports(sw):
for vlan in self.eline_map:
# the dl_vlan match is a workaround because flowvisor seems to bug when using
# dl_type=0x0800
match = {
'in_port': port,
'dl_type': 0x0800,
'dl_vlan': vlan,
'nw_src': ipaddr
}
self.add_flow(dp, 65534, match, actions)
self.quarantine[ipaddr] = redirect_to
return (True, 'Success')
def contention_block(self, ipaddr):
print "==> contention_block ipaddr=%s in all switches" % (ipaddr)
actions = []
for sw in self.net.nodes():
dp = self.net.node[sw]['conn']
for port in self.get_access_ports(sw):
for vlan in self.eline_map:
# the dl_vlan match is a workaround because flowvisor seems to bug when using
# dl_type=0x0800
match = {
'in_port': port,
'dl_type': 0x0800,
'dl_vlan': vlan,
'nw_src': ipaddr
}
self.add_flow(dp, 65534, match, actions)
return (True, 'Success')
def contention_quarantine_redirect(self, dp, ip_pkt, redirect_to, vlan_id):
print "==> create contention_quarantine_redirect in dpid=%s src=%s dst=%s redirect_to=%s" % (
dpid_lib.dpid_to_str(dp.id), ip_pkt.src, ip_pkt.dst, redirect_to)
# the dl_vlan match is a workaround because flowvisor seems to bug when using
# dl_type=0x0800
match = {
'nw_src': ip_pkt.src,
'nw_dst': ip_pkt.dst,
'dl_type': 0x0800,
'dl_vlan': vlan_id
}
actions = []
actions.append(dp.ofproto_parser.OFPActionSetNwDst(redirect_to))
actions.append(
dp.ofproto_parser.OFPActionOutput(
self.eline_map[vlan_id][dp.id]['bkb_port']))
self.add_flow(dp, 65535, match, actions, idle_timeout=120)
match = {
'nw_src': redirect_to,
'nw_dst': ip_pkt.src,
'dl_type': 0x0800,
'dl_vlan': vlan_id
}
actions = []
actions.append(dp.ofproto_parser.OFPActionSetNwSrc(str(ip_pkt.dst)))
actions.append(
dp.ofproto_parser.OFPActionOutput(
self.eline_map[vlan_id][dp.id]['access_port']))
self.add_flow(dp, 65535, match, actions, idle_timeout=120)
from ryu.services.protocols.bgp.bgpspeaker import BGPSpeaker
def dump_remote_best_path_change(event):
print 'the best path changed:', event.remote_as, event.prefix,\
event.nexthop, event.is_withdraw
def detect_peer_down(remote_ip, remote_as):
print 'Peer down:', remote_ip, remote_as
if __name__ == "__main__":
print "BHKA"
speaker = BGPSpeaker(as_number=64517,
router_id='10.0.0.2',
best_path_change_handler=dump_remote_best_path_change,
peer_down_handler=detect_peer_down)
print 'gamiesai'
speaker.neighbor_add('192.168.1.4', 64518)
# uncomment the below line ifthe speaker needs to talk with a bmp server.
# speaker.bmp_server_add('192.168.177.2', 11019)
count = 1
while True:
eventlet.sleep(30)
prefix = '10.20.' + str(count) + '.0/24'
print "add a new prefix", prefix
speaker.prefix_add(prefix)
count += 1
if count == 4:
speaker.shutdown()
break
