def __init__(self, id, config, logger):
# participant id
self.id = id
# print ID for logging
self.logger = logger
# used to signal termination
self.run = True
self.prefix_lock = {}
self.arp_table = {}
# Initialize participant params
self.cfg = PConfig(config, self.id)
# Vmac encoding mode
# self.cfg.vmac_mode = config_file["vmac_mode"]
# Dataplane mode---multi table or multi switch
# self.cfg.dp_mode = config_file["dp_mode"]
self.policies = self.cfg.config["Policies"]
# The port 0 MAC is used for tagging outbound rules as belonging to us
self.port0_mac = self.cfg.port0_mac
self.nexthop_2_part = self.cfg.config["Next Hops"]
# VNHs related params
self.num_VNHs_in_use = 0
self.VNH_2_prefix = {}
self.prefix_2_VNH = {}
# Keeps track of the current participant that is the default next hop for VNHs
self.nhpart_2_VNHs = {}
# Superset related params
if self.cfg.isSupersetsMode():
self.supersets = SuperSets(self, self.cfg.vmac_options)
else:
# TODO: create similar class and variables for MDS
self.mds = None
# Keep track of flow rules pushed
self.dp_pushed = []
# Keep track of flow rules which are scheduled to be pushed
self.dp_queued = []
self.bgp_instance = BGPPeer(id, self.cfg.asn, self.cfg.ports,
self.cfg.peers_in, self.cfg.peers_out)
self.fm_builder = FlowModMsgBuilder(self.id)
class GSSmT(GSS):
def __init__(self, sender, config, vmac_builder):
super(GSSmT, self).__init__(sender, config, vmac_builder)
self.logger = logging.getLogger('GSSmT')
self.fm_builder = FlowModMsgBuilder()
def start(self):
self.logger.info('start')
self.init_fabric()
def init_fabric(self):
self.logger.info('init fabric')
# MAIN-IN TABLE
# handle BGP traffic
self.logger.info('create flow mods to handle BGP traffic')
self.handle_bgp("main-in")
# handle ARP traffic
self.logger.info('create flow mods to handle ARP traffic')
self.handle_arp("main-in")
# tag participant packets
self.logger.info('create flow mods to handle participant traffic')
self.tagging("main-in")
# whatever doesn't match on any other rule, send to outbound switch
self.match_any_fwd("main-in", "outbound")
# OUTBOUND SWITCH
# whatever doesn't match on any other rule, send to inbound switch
self.match_any_fwd("outbound", "inbound")
# INBOUND SWITCH
# send all other packets to main
self.match_any_fwd("inbound", "main-out")
# MAIN-OUT TABLE
# default forwarding
self.default_forwarding("main-out")
self.sender.send(self.fm_builder.get_msg())
self.logger.info('sent flow mods to reference monitor')
def __init__(self, logger, sender, config):
self.logger = logger
self.sender = sender
self.config = config
self.fm_builder = FlowModMsgBuilder(0, self.config.flanc_auth["key"])
self.vmac_builder = VMACBuilder(self.config.vmac_options)
class GSS(object):
def __init__(self, logger, sender, config):
self.logger = logger
self.sender = sender
self.config = config
self.fm_builder = FlowModMsgBuilder(0, self.config.flanc_auth["key"])
self.vmac_builder = VMACBuilder(self.config.vmac_options)
def handle_BGP(self, rule_type):
### BGP traffic to route server
port = self.config.route_server.ports[0]
self.logger.debug("JEROENDEBUG-----------" + str(port))
action = {"fwd": [port.id]}
match = {"eth_dst": port.mac, "tcp_src": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
match = {"eth_dst": port.mac, "tcp_dst": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
### BGP traffic to participants
for participant in self.config.peers.values():
for port in participant.ports:
match = {"eth_dst": port.mac, "tcp_src": BGP}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
match = {"eth_dst": port.mac, "tcp_dst": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
def handle_ARP_in_main(self, rule_type):
### direct all ARP responses for the route server to it
port = self.config.route_server.ports[0]
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
for participant in self.config.peers.values():
### make sure ARP replies reach the participants
for port in participant.ports:
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
### direct gratuituous ARPs only to the respective participant
i = 0
for port in participant.ports:
vmac = self.vmac_builder.part_port_match(participant.name, i, inbound_bit = False)
vmac_mask = self.vmac_builder.part_port_mask(False)
match = {"in_port": "arp",
"eth_type": ETH_TYPE_ARP,
"eth_dst": (vmac, vmac_mask)}
action = {"set_eth_dst": MAC_BROADCAST, "fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
i += 1
### flood ARP requests that have gone through the arp switch, but only on non switch-switch ports
match = {"in_port": "arp",
"eth_type": ETH_TYPE_ARP,
"eth_dst": MAC_BROADCAST}
ports = []
for participant in self.config.peers.values():
for port in participant.ports:
ports.append(port.id)
ports.append(self.config.route_server.ports[0].id)
action = {"fwd": ports}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_BROADCAST_PRIORITY, match, action)
### forward all ARP requests to the arp switch
match = {"eth_type": ETH_TYPE_ARP}
action = {"fwd": ["arp"]}
self.fm_builder.add_flow_mod("insert", rule_type, VNH_ARP_FILTER_PRIORITY, match, action)
def handle_ARP_in_arp(self, rule_type):
### direct ARP requests for VNHs to ARP proxy
port = self.config.arp_proxy.ports[0]
match = {"in_port": "main",
"eth_type": ETH_TYPE_ARP,
"arp_tpa": (str(self.config.vnhs.network), str(self.config.vnhs.netmask))}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, VNH_ARP_PRIORITY, match, action)
### send all other ARP requests back
match = {"eth_type": ETH_TYPE_ARP, "in_port": "main"}
action = {"fwd": [OFPP_IN_PORT]}
self.fm_builder.add_flow_mod("insert", rule_type, DEFAULT_PRIORITY, match, action)
### send all ARP replies from the ARP proxy to the main switch
match = {"eth_type": ETH_TYPE_ARP, "in_port": "arp proxy"}
action = {"fwd": ["main"]}
self.fm_builder.add_flow_mod("insert", rule_type, DEFAULT_PRIORITY, match, action)
def handle_participant_with_outbound(self, rule_type):
for participant in self.config.peers.values():
### outbound policies specified
if participant.outbound_rules:
mac = None
for port in participant.ports:
if mac is None:
mac = port.mac
match = {"in_port": port.id}
action = {"set_eth_src": mac, "fwd": ["outbound"]}
self.fm_builder.add_flow_mod("insert", rule_type, OUTBOUND_PRIORITY, match, action)
def handle_participant_with_inbound(self, rule_type, mask_inbound_bit):
for participant in self.config.peers.values():
### inbound policies specified
if participant.inbound_rules:
i = 0
for port in participant.ports:
vmac = self.vmac_builder.part_port_match(participant.name, i, False)
i += 1
vmac_mask = self.vmac_builder.part_port_mask(mask_inbound_bit)
match = {"eth_dst": (vmac, vmac_mask)}
action = {"set_eth_dst": port.mac,
"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, FORWARDING_PRIORITY, match, action)
def default_forwarding(self, rule_type):
for participant in self.config.peers.values():
### default forwarding
if not participant.inbound_rules:
vmac = self.vmac_builder.next_hop_match(participant.name, False)
vmac_mask = self.vmac_builder.next_hop_mask(False)
port = participant.ports[0]
match = {"eth_dst": (vmac, vmac_mask)}
action = {"set_eth_dst": port.mac,
"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, FORWARDING_PRIORITY, match, action)
def default_forwarding_inbound(self, rule_type, fwd):
## set the inbound bit to zero
for participant in self.config.peers.values():
if participant.inbound_rules:
port = participant.ports[0]
vmac_match = self.vmac_builder.next_hop_match(participant.name, False)
vmac_match_mask = self.vmac_builder.next_hop_mask(False)
vmac_action = self.vmac_builder.part_port_match(participant.name, 0, False)
match = {"eth_dst": (vmac_match, vmac_match_mask)}
action = {"set_eth_dst": vmac_action, "fwd": [fwd]}
self.fm_builder.add_flow_mod("insert", "inbound", INBOUND_PRIORITY, match, action)
def handle_inbound(self, rule_type):
vmac = self.vmac_builder.only_first_bit()
match = {"eth_dst": (vmac, vmac)}
action = {"fwd": ["outbound"]}
self.fm_builder.add_flow_mod("insert", rule_type, INBOUND_BIT_PRIORITY, match, action)
def match_any_fwd(self, rule_type, dst):
match = {}
action = {"fwd": [dst]}
self.fm_builder.add_flow_mod("insert", rule_type, DEFAULT_PRIORITY, match, action)
def delete_flow_rule(self, rule_type, cookie, cookie_mask):
self.fm_builder.delete_flow_mod("remove", rule_type, cookie, cookie_mask)
def start(self):
self.logger.info('start')
self.init_fabric()
self.sender.send(self.fm_builder.get_msg())
self.logger.info('sent flow mods to reference monitor')
def __init__(self, logger, sender, config):
self.logger = logger
self.sender = sender
self.config = config
self.fm_builder = FlowModMsgBuilder(0, self.config.flanc_auth["key"])
self.vmac_builder = VMACBuilder(self.config.vmac_options)
class GSS(object):
def __init__(self, logger, sender, config):
self.logger = logger
self.sender = sender
self.config = config
self.fm_builder = FlowModMsgBuilder(0, self.config.flanc_auth["key"])
self.vmac_builder = VMACBuilder(self.config.vmac_options)
def handle_BGP(self, rule_type):
### BGP traffic to route server
port = self.config.route_server.ports[0]
action = {"fwd": [port.id]}
match = {"eth_dst": port.mac, "tcp_src": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, "bgp", match, action)
match = {"eth_dst": port.mac, "tcp_dst": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, "bgp", match, action)
### BGP traffic to participants
for participant in self.config.peers.values():
for port in participant.ports:
match = {"eth_dst": port.mac, "tcp_src": BGP}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "bgp", match,
action)
match = {"eth_dst": port.mac, "tcp_dst": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, "bgp", match,
action)
def handle_ARP_in_main(self, rule_type):
### direct all ARP responses for the route server to it
port = self.config.route_server.ports[0]
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "arp", match, action)
for participant in self.config.peers.values():
### make sure ARP replies reach the participants
for port in participant.ports:
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "arp", match,
action)
### direct gratuituous ARPs only to the respective participant
i = 0
for port in participant.ports:
vmac = self.vmac_builder.part_port_match(participant.name,
i,
inbound_bit=False)
vmac_mask = self.vmac_builder.part_port_mask(False)
match = {
"in_port": "arp",
"eth_type": ETH_TYPE_ARP,
"eth_dst": (vmac, vmac_mask)
}
action = {"set_eth_dst": MAC_BROADCAST, "fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "arp", match,
action)
i += 1
### flood ARP requests that have gone through the arp switch, but only on non switch-switch ports
match = {
"in_port": "arp",
"eth_type": ETH_TYPE_ARP,
"eth_dst": MAC_BROADCAST
}
ports = []
for participant in self.config.peers.values():
for port in participant.ports:
ports.append(port.id)
ports.append(self.config.route_server.ports[0].id)
action = {"fwd": ports}
self.fm_builder.add_flow_mod("insert", rule_type, "arp_broadcast",
match, action)
### forward all ARP requests to the arp switch
match = {"eth_type": ETH_TYPE_ARP}
action = {"fwd": ["arp"]}
self.fm_builder.add_flow_mod("insert", rule_type, "arp_filter", match,
action)
def handle_ARP_in_arp(self, rule_type):
### direct ARP requests for VNHs to ARP proxy
port = self.config.arp_proxy.ports[0]
match = {
"in_port":
"main",
"eth_type":
ETH_TYPE_ARP,
"arp_tpa":
(str(self.config.vnhs.network), str(self.config.vnhs.netmask))
}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "vnh_arp", match,
action)
### send all other ARP requests back
match = {"eth_type": ETH_TYPE_ARP, "in_port": "main"}
action = {"fwd": [OFPP_IN_PORT]}
self.fm_builder.add_flow_mod("insert", rule_type, "default", match,
action)
### send all ARP replies from the ARP proxy to the main switch
match = {"eth_type": ETH_TYPE_ARP, "in_port": "arp proxy"}
action = {"fwd": ["main"]}
self.fm_builder.add_flow_mod("insert", rule_type, "default", match,
action)
def handle_participant_with_outbound(self, rule_type):
for participant in self.config.peers.values():
### outbound policies specified
if participant.outbound_rules:
mac = None
for port in participant.ports:
if mac is None:
mac = port.mac
match = {"in_port": port.id}
action = {"set_eth_src": mac, "fwd": ["outbound"]}
self.fm_builder.add_flow_mod("insert", rule_type,
"outbound", match, action)
def handle_participant_with_inbound(self, rule_type, mask_inbound_bit):
for participant in self.config.peers.values():
### inbound policies specified
if participant.inbound_rules:
i = 0
for port in participant.ports:
vmac = self.vmac_builder.part_port_match(
participant.name, i, False)
i += 1
vmac_mask = self.vmac_builder.part_port_mask(
mask_inbound_bit)
match = {"eth_dst": (vmac, vmac_mask)}
action = {"set_eth_dst": port.mac, "fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "output",
match, action)
def default_forwarding(self, rule_type):
for participant in self.config.peers.values():
### default forwarding
if not participant.inbound_rules:
vmac = self.vmac_builder.next_hop_match(
participant.name, False)
vmac_mask = self.vmac_builder.next_hop_mask(False)
port = participant.ports[0]
print "VMAC default rule match:", (vmac, vmac_mask)
match = {"eth_dst": (vmac, vmac_mask)}
action = {"set_eth_dst": port.mac, "fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, "output",
match, action)
def default_forwarding_inbound(self, rule_type, fwd):
## set the inbound bit to zero
for participant in self.config.peers.values():
if participant.inbound_rules:
port = participant.ports[0]
vmac_match = self.vmac_builder.next_hop_match(
participant.name, False)
vmac_match_mask = self.vmac_builder.next_hop_mask(False)
vmac_action = self.vmac_builder.part_port_match(
participant.name, 0, False)
print "VMAC default rule match:", (vmac_match, vmac_match_mask)
match = {"eth_dst": (vmac_match, vmac_match_mask)}
action = {"set_eth_dst": vmac_action, "fwd": [fwd]}
self.fm_builder.add_flow_mod("insert", "inbound", "inbound",
match, action)
def handle_inbound(self, rule_type):
vmac = self.vmac_builder.only_first_bit()
match = {"eth_dst": (vmac, vmac)}
action = {"fwd": ["outbound"]}
self.fm_builder.add_flow_mod("insert", rule_type, "inbound", match,
action)
def match_any_fwd(self, rule_type, dst):
match = {}
action = {"fwd": [dst]}
self.fm_builder.add_flow_mod("insert", rule_type, "default", match,
action)
def delete_flow_rule(self, rule_type, cookie, cookie_mask):
self.fm_builder.delete_flow_mod("remove", rule_type, cookie,
cookie_mask)
def start(self):
self.logger.info('start')
self.init_fabric()
self.sender.send(self.fm_builder.get_msg())
self.logger.info('sent flow mods to reference monitor')
class PCtrl(object):
def __init__(self, id, config, logger):
# participant id
self.id = id
# print ID for logging
self.logger = logger
# used to signal termination
self.run = True
self.prefix_lock = {}
self.arp_table = {}
# Initialize participant params
self.cfg = PConfig(config, self.id)
# Vmac encoding mode
# self.cfg.vmac_mode = config_file["vmac_mode"]
# Dataplane mode---multi table or multi switch
# self.cfg.dp_mode = config_file["dp_mode"]
self.policies = self.cfg.config["Policies"]
# The port 0 MAC is used for tagging outbound rules as belonging to us
self.port0_mac = self.cfg.port0_mac
self.nexthop_2_part = self.cfg.config["Next Hops"]
# VNHs related params
self.num_VNHs_in_use = 0
self.VNH_2_prefix = {}
self.prefix_2_VNH = {}
# Keeps track of the current participant that is the default next hop for VNHs
self.nhpart_2_VNHs = {}
# Superset related params
if self.cfg.isSupersetsMode():
self.supersets = SuperSets(self, self.cfg.vmac_options)
else:
# TODO: create similar class and variables for MDS
self.mds = None
# Keep track of flow rules pushed
self.dp_pushed = []
# Keep track of flow rules which are scheduled to be pushed
self.dp_queued = []
self.bgp_instance = BGPPeer(id, self.cfg.asn, self.cfg.ports,
self.cfg.peers_in, self.cfg.peers_out)
self.fm_builder = FlowModMsgBuilder(self.id)
def sanitize_policies(self, policies):
port_count = len(self.cfg.ports)
# sanitize the input policies
if 'inbound' in policies:
for policy in policies['inbound']:
if 'action' not in policy:
continue
if 'fwd' in policy['action'] and int(
policy['action']['fwd']) >= port_count:
policy['action']['fwd'] = 0
return policies
def load_policies(self, policy_file):
# Load policies from file
with open(policy_file, 'r') as f:
policies = json.load(f)
return self.sanitize_policies(policies)
def initialize_dataplane(self):
"Read the config file and update the queued policy variable"
self.logger.info("Initializing inbound rules")
final_switch = "main-in"
if self.cfg.isMultiTableMode() or self.cfg.isMultiHopMode():
final_switch = "main-out"
self.init_vnh_assignment()
rule_msgs = init_inbound_rules(self.id, self.policies, self.supersets,
final_switch)
self.logger.debug("Rule Messages INBOUND:: " + str(rule_msgs))
rule_msgs2 = init_outbound_rules(self, self.id, self.policies,
self.supersets, final_switch)
self.logger.debug("Rule Messages OUTBOUND:: " + str(rule_msgs2))
if 'changes' in rule_msgs2:
if 'changes' not in rule_msgs:
rule_msgs['changes'] = []
rule_msgs['changes'] += rule_msgs2['changes']
#TODO: Initialize Outbound Policies from RIB
self.logger.debug("Rule Messages:: " + str(rule_msgs))
if 'changes' in rule_msgs:
self.dp_queued.extend(rule_msgs["changes"])
def push_dp(self):
'''
(1) Check if there are any policies queued to be pushed
(2) Send the queued policies to reference monitor
'''
# it is crucial that dp_queued is traversed chronologically
for flowmod in self.dp_queued:
self.fm_builder.add_flow_mod(**flowmod)
self.dp_pushed.append(flowmod)
# reset queue
self.dp_queued = []
flows = self.fm_builder.get_msg()
self.fm_builder.reset_flow_mod()
return flows
# reset flow_mods after send - self.flow_mods = []
def process_event(self, data, mod_type=None):
"Locally process each incoming network event"
if 'bgp' in data:
self.logger.debug("Event Received: BGP Update.")
route = data['bgp']
# Process the incoming BGP updates from XRS
#self.logger.debug("BGP Route received: "+str(route)+" "+str(type(route)))
return self.process_bgp_route(route)
elif 'policy' in data:
# Process the event requesting change of participants' policies
self.logger.debug("Event Received: Policy change.")
change_info = data['policy']
for element in change_info:
if 'remove' in element:
self.process_policy_changes(element['remove'], 'remove')
#self.logger.debug("PART_Test: REMOVE: %s" % element)
if 'insert' in element:
self.process_policy_changes(element['insert'], 'insert')
#self.logger.debug("PART_Test: INSERT: %s" % element)
elif 'arp' in data:
if data['arp'] == 1:
ip = data['SPA']
mac = data['SHA']
part = data['participant']
if part not in self.nhpart_2_VNHs:
self.nhpart_2_VNHs[part] = []
if ip not in self.nhpart_2_VNHs[part]:
self.nhpart_2_VNHs[part].append(ip)
newbest = (part, mac)
if ip not in self.arp_table:
self.arp_table[ip] = ARPEntry(newbest, None)
else:
ae = self.arp_table[ip]
# Modify only if it is an actual change
if self.arp_table[ip].best_hop != newbest:
self.arp_table[ip] = ARPEntry(newbest, ae.best_hop)
else:
(requester_srcmac, requested_vnh) = tuple(data['arp'])
self.logger.debug("Event Received: ARP request for IP " +
str(requested_vnh))
self.process_arp_request(requester_srcmac, requested_vnh)
else:
self.logger.warn("UNKNOWN EVENT TYPE RECEIVED: " + str(data))
def process_message(self, msg):
mtype = msg["msg_type"]
if mtype == "linkdown":
part = msg["participant"]
if part not in self.nhpart_2_VNHs:
return
vnhs = self.nhpart_2_VNHs[part]
for v in vnhs:
best = self.arp_table[v].best_hop
second = self.arp_table[v].prev_hop
if part == best[0] and second:
# Send ARP with available second best-hop
for port in self.cfg.ports:
self.process_arp_request(port["MAC"], v, second[1])
def process_policy_changes(self, change_info, mod_type):
# idea to remove flow rules for the old policies with cookies
'''
removal_msgs = []
for element in change_info:
if 'removal_cookies' in element:
for cookie in element['removal_cookies']:
cookie_id = (cookie['cookie'],65535)
match_args = cookie['match']
mod = {"rule_type":"inbound", "priority":4,"match":{} , "action":{}, "cookie":cookie_id, "mod_type":"remove"}
removal_msgs.append(mod)
self.dp_queued.extend(removal_msgs)
'''
# json file format for change_info - mod_type = remove or insert
'''
{
"policy": [
{
mod_type: [
# change_info begin
{
"inbound": [
{ cookie1 ... match ... action }
{ cookie2 ... match ... action }
]
}
{
"outbound": [
{ cookie1 ... match ... action }
{ cookie2 ... match ... action }
]
}
# change_info end
] // end mod_type-array
},
{
mod_type: ...
}
] // end policy-array
}
'''
policies = self.sanitize_policies(change_info)
final_switch = "main-in"
if self.cfg.isMultiTableMode():
final_switch = "main-out"
#self.init_vnh_assignment() // not used
inbound_policies = {}
outbound_policies = {}
for element in policies:
if 'inbound' in element:
inbound_policies = element
if 'outbound' in element:
outbound_policies = element
#self.logger.debug("PART_Test: INBOUND: %s" % inbound_policies)
#self.logger.debug("PART_Test: OUTBOUND: %s" % outbound_policies)
rule_msgs = init_inbound_rules(self.id, inbound_policies,
self.supersets, final_switch)
rule_msgs2 = init_outbound_rules(self, self.id, outbound_policies,
self.supersets, final_switch)
if 'changes' in rule_msgs2:
if 'changes' not in rule_msgs:
rule_msgs['changes'] = []
rule_msgs['changes'] += rule_msgs2['changes']
for rule in rule_msgs['changes']:
rule['mod_type'] = mod_type
#self.logger.debug("PART_Test: Rule Msgs: %s" % rule_msgs)
if 'changes' in rule_msgs:
self.dp_queued.extend(rule_msgs["changes"])
self.push_dp()
def process_bgp_route(self, route):
"Process each incoming BGP advertisement"
tstart = time.time()
# Map to update for each prefix in the route advertisement.
updates = self.bgp_instance.update(route)
#self.logger.debug("process_bgp_route:: "+str(updates))
# TODO: This step should be parallelized
# TODO: The decision process for these prefixes is going to be same, we
# should think about getting rid of such redundant computations.
for update in updates:
self.bgp_instance.decision_process_local(update)
self.vnh_assignment(update)
if TIMING:
elapsed = time.time() - tstart
self.logger.debug("Time taken for decision process: " +
str(elapsed))
tstart = time.time()
if self.cfg.isSupersetsMode():
################## SUPERSET RESPONSE TO BGP ##################
# update supersets
"Map the set of BGP updates to a list of superset expansions."
ss_changes, ss_changed_prefs = self.supersets.update_supersets(
self, updates)
if TIMING:
elapsed = time.time() - tstart
self.logger.debug("Time taken to update supersets: " +
str(elapsed))
tstart = time.time()
# ss_changed_prefs are prefixes for which the VMAC bits have changed
# these prefixes must have gratuitous arps sent
garp_required_vnhs = [
self.prefix_2_VNH[prefix] for prefix in ss_changed_prefs
]
"If a recomputation event was needed, wipe out the flow rules."
if ss_changes["type"] == "new":
self.logger.debug("Wiping outbound rules.")
wipe_msgs = msg_clear_all_outbound(self.policies,
self.port0_mac)
self.dp_queued.extend(wipe_msgs)
#if a recomputation was needed, all VMACs must be reARPed
# TODO: confirm reARPed is a word
garp_required_vnhs = self.VNH_2_prefix.keys()
if len(ss_changes['changes']) > 0:
self.logger.debug("Supersets have changed: " + str(ss_changes))
"Map the superset changes to a list of new flow rules."
flow_msgs = update_outbound_rules(ss_changes, self.policies,
self.supersets,
self.port0_mac)
self.logger.debug("Flow msgs: " + str(flow_msgs))
"Dump the new rules into the dataplane queue."
self.dp_queued.extend(flow_msgs)
if TIMING:
elapsed = time.time() - tstart
self.logger.debug("Time taken to deal with ss_changes: " +
str(elapsed))
tstart = time.time()
################## END SUPERSET RESPONSE ##################
else:
# TODO: similar logic for MDS
self.logger.debug("Creating ctrlr messages for MDS scheme")
if TIMING:
elapsed = time.time() - tstart
self.logger.debug("Time taken to push dp msgs: " + str(elapsed))
tstart = time.time()
changed_vnhs, announcements = self.bgp_instance.bgp_update_peers(
updates, self.prefix_2_VNH, self.cfg.ports)
""" Combine the VNHs which have changed BGP default routes with the
VNHs which have changed supersets.
"""
changed_vnhs = set(changed_vnhs)
changed_vnhs.update(garp_required_vnhs)
# Send gratuitous ARP responses for all them
# for vnh in changed_vnhs:
# self.process_arp_request(None, vnh)
# Tell Route Server that it needs to announce these routes
# for announcement in announcements:
# # TODO: Complete the logic for this function
# self.send_announcement(announcement)
if TIMING:
elapsed = time.time() - tstart
self.logger.debug("Time taken to send garps/announcements: " +
str(elapsed))
tstart = time.time()
return self.push_dp()
def vnh_assignment(self, update):
"Assign VNHs for the advertised prefixes"
if self.cfg.isSupersetsMode():
" Superset"
# TODO: Do we really need to assign a VNH for each advertised prefix?
if ('announce' in update):
prefix = update['announce'].prefix
if (prefix not in self.prefix_2_VNH):
# get next VNH and assign it the prefix
self.num_VNHs_in_use += 1
vnh = str(self.cfg.VNHs[self.num_VNHs_in_use])
self.prefix_2_VNH[prefix] = vnh
self.VNH_2_prefix[vnh] = prefix
else:
"Disjoint"
# TODO: @Robert: Place your logic here for VNH assignment for MDS scheme
self.logger.debug("VNH assignment called for disjoint vmac_mode")
def init_vnh_assignment(self):
"Assign VNHs for the advertised prefixes"
if self.cfg.isSupersetsMode():
" Superset"
# TODO: Do we really need to assign a VNH for each advertised prefix?
#self.bgp_instance.rib["local"].dump()
prefixes = self.bgp_instance.rib.get_local_prefixes()
#print 'init_vnh_assignment: prefixes:', prefixes
#print 'init_vnh_assignment: prefix_2_VNH:', self.prefix_2_VNH
for prefix in prefixes:
if (prefix not in self.prefix_2_VNH):
# get next VNH and assign it the prefix
self.num_VNHs_in_use += 1
vnh = str(self.cfg.VNHs[self.num_VNHs_in_use])
self.prefix_2_VNH[prefix] = vnh
self.VNH_2_prefix[vnh] = prefix
else:
"Disjoint"
# TODO: @Robert: Place your logic here for VNH assignment for MDS scheme
self.logger.debug("VNH assignment called for disjoint vmac_mode")
class MDS(object):
def __init__(self, logger, sender, config):
self.logger = logger
self.sender = sender
self.config = config
self.fm_builder = FlowModMsgBuilder(0, self.config.flanc_auth["key"])
def handle_BGP(self, rule_type):
### BGP traffic to route server
port = self.config.route_server.ports[0]
action = {"fwd": [port.id]}
match = {"eth_dst": port.mac, "tcp_src": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
match = {"eth_dst": port.mac, "tcp_dst": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
### BGP traffic to participants
for participant in self.config.peers.values():
for port in participant.ports:
match = {"eth_dst": port.mac, "tcp_src": BGP}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
match = {"eth_dst": port.mac, "tcp_dst": BGP}
self.fm_builder.add_flow_mod("insert", rule_type, BGP_PRIORITY, match, action)
def handle_ARP(self, rule_type):
### direct ARP requests for VNHs to ARP proxy
port = self.config.arp_proxy.ports[0]
match = {"eth_type": ETH_TYPE_ARP, "arp_tpa": (str(self.config.vnhs.network), str(self.config.vnhs.netmask))}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
### direct all ARP requests for the route server to it
port = self.config.route_server.ports[0]
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
for participant in self.config.peers.values():
### make sure ARP replies reach the participants
for port in participant.ports:
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
### flood ARP requests
match = {"eth_type": ETH_TYPE_ARP, "eth_dst": MAC_BROADCAST}
ports = []
for participant in self.config.peers.values():
for port in participant.ports:
ports.append(port.id)
ports.append(self.config.arp_proxy.ports[0].id)
ports.append(self.config.route_server.ports[0].id)
action = {"fwd": ports}
self.fm_builder.add_flow_mod("insert", rule_type, ARP_PRIORITY, match, action)
def handle_participant_with_outbound(self, rule_type):
for participant in self.config.peers.values():
### outbound policies specified
if participant.outbound_rules:
mac = None
for port in participant.ports:
if mac is None:
mac = port.mac
match = {"in_port": port.id}
action = {"set_eth_src": mac, "fwd": ["outbound"]}
self.fm_builder.add_flow_mod("insert", rule_type, OUTBOUND_PRIORITY, match, action)
def handle_participant_with_inbound(self, rule_type):
for participant in self.config.peers.values():
### send all traffic for participants with inbound policies to inbound handler
if participant.inbound_rules:
for port in participant.ports:
match = {"eth_dst": port.mac}
action = {"fwd": ["inbound"]}
self.fm_builder.add_flow_mod("insert", rule_type, INBOUND_PRIORITY, match, action)
def default_forwarding(self, rule_type):
for participant in self.config.peers.values():
### default forwarding
if not participant.inbound_rules:
port = participant.ports[0]
match = {"eth_dst": port.mac}
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, FORWARDING_PRIORITY, match, action)
def default_forwarding_inbound(self, rule_type, in_port):
### default forwarding for traffic to participants with inbound policies
for participant in self.config.peers.values():
if participant.inbound_rules:
for port in participant.ports:
match = {"eth_dst": port.mac}
if in_port:
match["in_port"] = 1
action = {"fwd": [port.id]}
self.fm_builder.add_flow_mod("insert", rule_type, FORWARDING_PRIORITY, match, action)
def match_any_fwd(self, rule_type, dst):
match = {}
action = {"fwd": [dst]}
self.fm_builder.add_flow_mod("insert", rule_type, DEFAULT_PRIORITY, match, action)
def start(self):
self.logger.info('start')
self.init_fabric()
self.sender.send(self.fm_builder.get_msg())
self.logger.info('sent flow mods to reference monitor')
def __init__(self, sender, config, vmac_builder):
super(GSSmT, self).__init__(sender, config, vmac_builder)
self.logger = logging.getLogger('GSSmT')
self.fm_builder = FlowModMsgBuilder()
