def actions_to_ryu(actions, rule):
""" Converts a list of actions to a list of ryu actions
This returns both a instruction list and any extra messages that
are required to install the instructions such as group mod messages.
Currently this is not smart about reusing groups.
actions: A iterable list actions such as ActionSet, ActionList,
or Bucket.
rule: The rule being converted
return: A tuple ([actions], [extra messages])
"""
ret = []
extra_messages = []
for action in actions:
if action[0] == 'OUTPUT':
ret.append(parser.OFPActionOutput(action[1]))
elif action[0] == 'COPY_TTL_OUT':
ret.append(parser.OFPActionCopyTtlOut())
elif action[0] == 'COPY_TTL_IN':
ret.append(parser.OFPActionCopyTtlIn())
elif action[0] == 'SET_MPLS_TTL':
ret.append(parser.OFPActionSetMplsTtl(action[1]))
elif action[0] == 'DEC_MPLS_TTL':
ret.append(parser.OFPActionDecMplsTtl())
elif action[0] == 'PUSH_VLAN':
ret.append(parser.OFPActionPushVlan(action[1]))
elif action[0] == 'POP_VLAN':
ret.append(parser.OFPActionPopVlan())
elif action[0] == 'PUSH_MPLS':
ret.append(parser.OFPActionPushMpls(action[1]))
elif action[0] == 'POP_MPLS':
ret.append(parser.OFPActionPopMpls(action[1]))
elif action[0] == 'SET_QUEUE':
ret.append(parser.OFPActionSetQueue(action[1]))
elif action[0] == 'GROUP':
if isinstance(action[1], Group):
group_id, extra = group_to_ryu(action[1], rule)
ret.append(parser.OFPActionGroup(group_id))
extra_messages += extra
else:
ret.append(parser.OFPActionGroup(action[1]))
elif action[0] == 'SET_NW_TTL':
ret.append(parser.OFPActionSetNwTtl(action[1]))
elif action[0] == 'DEC_NW_TTL':
ret.append(parser.OFPActionDecNwTtl())
elif action[0] == 'SET_FIELD':
set_field = {action[1][0].lower(): action[1][1]}
ret.append(parser.OFPActionSetField(**set_field))
elif action[0] == 'PUSH_PBB':
ret.append(parser.OFPActionPushPbb(action[1]))
elif action[0] == 'POP_PBB':
ret.append(parser.OFPActionPopPbb())
else:
assert not "GGRR"
return (ret, extra_messages)
def push_mpls(table, mpls_label, eth_type=ether.ETH_TYPE_MPLS):
"""Return OpenFlow action list to push MPLS header with MPLS tag.
Args:
mpls_label (int): MPLS Label
eth_type (int): ethertype that is set in the packet, default to MPLS unicast, could also be MPLS multicast
Returns:
list: actions to push MPLS header and set MPLS label.
"""
return [parser.OFPActionPushMpls(eth_type), table.set_field(**{'mpls_label': mpls_label})]
def install_edge(self, datapath):
""" Table 0 is stateless """
""" Set table 1 as stateful solo per usare GD"""
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=1,
stateful=1)
datapath.send_msg(req)
""" Set table 3 as stateful """
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=3,
stateful=1)
datapath.send_msg(req)
""" Set table 4 as stateful """
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=4,
stateful=1)
datapath.send_msg(req)
""" Set table 5 as stateful """
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=5,
stateful=1)
datapath.send_msg(req)
############################### LOOKUP/UPDATE ################
""" Tab1 """
""" Non mi interessa """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=1)
datapath.send_msg(req)
""" Non mi interessa """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=1)
datapath.send_msg(req)
""" Tab3 """
""" Set lookup extractor = {MPLS_label} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_MPLS_LABEL],
table_id=3)
datapath.send_msg(req)
""" Set update extractor = {MPLS_label} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_MPLS_LABEL],
table_id=3)
datapath.send_msg(req)
""" Tab4 """
""" Set lookup extractor = {MAC_SRC} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=4)
datapath.send_msg(req)
""" Set update extractor = {MAC_SRC} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=4)
datapath.send_msg(req)
""" Tab5 """
""" Set lookup extractor = {MAC_DST} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_DST],
table_id=5)
datapath.send_msg(req)
""" Set update extractor = {MAC_SRC} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=5)
datapath.send_msg(req)
########################### SET HF GD DATA VARIABLE TAB 1 ############################################
''' GD[0] = datapath.id<<6 + numero crescente'''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=1,
global_data_variable_id=0,
value=(datapath.id << 6) + 1)
datapath.send_msg(req)
########################### SET HF GD DATA VARIABLE TAB 3 ############################################
''' HF[0] = OXM_OF_MPLS_LABEL [id_pkt] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=0,
field=ofproto.OXM_OF_MPLS_LABEL)
datapath.send_msg(req)
''' HF[1] = OXM_OF_MPLS_TC [pesoArchi] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=1,
field=ofproto.OXM_OF_MPLS_TC)
datapath.send_msg(req)
''' GD[0] = 0 '''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=3, global_data_variable_id=0, value=0)
datapath.send_msg(req)
''' GD[1] = datapath.id '''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=3, global_data_variable_id=1, value=0)
datapath.send_msg(req)
########################### SET HF GD DATA VARIABLE TAB 4 ############################################
''' HF[0] = OXM_OF_MPLS_LABEL [id_pkt] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=4,
extractor_id=0,
field=ofproto.OXM_OF_MPLS_LABEL)
datapath.send_msg(req)
''' HF[1] = OXM_OF_MPLS_TC [pesoArchi] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=4,
extractor_id=1,
field=ofproto.OXM_OF_MPLS_TC)
datapath.send_msg(req)
''' GD[0] = datapath.id '''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=4, global_data_variable_id=0, value=1)
datapath.send_msg(req)
########################### SET CONDITION TAB 4 ############################################
# condition 0: MPLS_TC <= COSTO MEMORIZZATO (FD[0]) ?
# condition 0: HF[1] <= FD[0] ?
req = osparser.OFPExpMsgSetCondition(datapath=datapath,
table_id=4,
condition_id=0,
condition=osproto.CONDITION_LTE,
operand_1_hf_id=1,
operand_2_fd_id=0)
datapath.send_msg(req)
# condition 1: MPLS_TC <= 1 --> ovvero e il primo hop ?
# condition 1: HF[1] <= GD[0] ?
req = osparser.OFPExpMsgSetCondition(datapath=datapath,
table_id=4,
condition_id=1,
condition=osproto.CONDITION_LTE,
operand_1_hf_id=1,
operand_2_gd_id=0)
datapath.send_msg(req)
''' ####################### TAB 0 PushLabelMPLS '''
# Se il pacchetto proviene da una porta host (HOST_PORT) push label mpls e GOTO Tab 1
match = ofparser.OFPMatch(in_port=HOST_PORT)
actions = [ofparser.OFPActionPushMpls()]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(1)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
# Se proviene da un'altra porta ha gia la label MPLS GOTO Tab 1 giusto per dirlo esplicitamente perche ci andrebbe da solo CREDO NON DEVO FARE LA PushMpls
match = ofparser.OFPMatch()
actions = [] #se proviene da un altra porta ha gia la label MPLS
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(1)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
''' ####################### TAB 1 marca il pkt con ID_PKT '''
# Setta la label_mpls se non e gia stata configurata con il valore GD[0] + 1 -> (id_switch << 6) + 1
match = ofparser.OFPMatch(eth_type=0x8847, mpls_label=0)
actions = [
osparser.OFPExpActionWriteContextToField(
src_type=osproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=0,
dst_field=ofproto.OXM_OF_MPLS_LABEL),
osparser.OFPExpActionSetDataVariable(table_id=1,
opcode=osproto.OPCODE_SUM,
output_gd_id=0,
operand_1_gd_id=0,
operand_2_cost=1)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(2)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=1,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
match = ofparser.OFPMatch(eth_type=0x8847)
actions = []
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(2)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=1,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
''' ####################### TAB 2 NULLA serve solo per i bug di OpenFlow, servono 2 stage xke le modifiche MPLS siano visibili'''
# Non fa niente, ci sta solo per risolvere bug (presunti) di OpenFlow
match = ofparser.OFPMatch(eth_type=0x8847)
actions = []
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(3)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=2,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
'''####################### TAB 3 Verifica i duplicati, lo stato e' dato da mpls_label'''
''' somma il costo del link di ingresso al valore memorizzato nel pacchetto mpls_tc + 1 '''
''' scrive il campo metada = 1 se e' un pacchetto duplicato ovvero nello stato 1 '''
""" Riga 1 """
# GD[0] = HF[1] + 1 -> MPLS_TC + 1
# HF [1] = GD[0] -> MPLS_TC = GD[0]
# WriteMetadata = 1 -> pacchetto duplicato
# SetState(1)
# GOTO Tab 2
match = ofparser.OFPMatch(state=1, eth_type=0x8847)
actions = [
osparser.OFPExpActionSetDataVariable(table_id=3,
opcode=osproto.OPCODE_SUM,
output_gd_id=0,
operand_1_hf_id=1,
operand_2_cost=1),
osparser.OFPExpActionWriteContextToField(
src_type=osproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=0,
dst_field=ofproto.OXM_OF_MPLS_TC),
# osparser.OFPExpActionSetState(state=1, table_id=3, idle_timeout=15)]
osparser.OFPExpActionSetState(state=1, table_id=3)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=1,
metadata_mask=0xFFFFFFFF),
ofparser.OFPInstructionGotoTable(4)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=3,
priority=1198,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Riga 2 """
# GD[0] = HF[1] + 1 -> MPLS_TC + 1
# HF [1] = GD[0] -> MPLS_TC = GD[0]
# SetState(1)
# GOTO Tab 4
match = ofparser.OFPMatch(state=0, eth_type=0x8847)
actions = [
osparser.OFPExpActionSetDataVariable(table_id=3,
opcode=osproto.OPCODE_SUM,
output_gd_id=0,
operand_1_hf_id=1,
operand_2_cost=1),
osparser.OFPExpActionWriteContextToField(
src_type=osproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=0,
dst_field=ofproto.OXM_OF_MPLS_TC),
# osparser.OFPExpActionSetState(state=1, table_id=3, idle_timeout=15)]
osparser.OFPExpActionSetState(state=1, table_id=3)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(4)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=3,
priority=198,
match=match,
instructions=inst)
datapath.send_msg(mod)
'''# ####################### TAB 4 verifica le condizioni C[0] e C[1]'''
''' C[0] verifica se il costo memorizzato nel pacchetto e' <= di quello gia conosciuto (in pratica se il pacchetto ha fatto un percorso migliore) '''
''' C[1] serve semplicemente a capire se e' lo switch direttametne collegato all'host che parla e quindi non bisogna fare il pop della label MPLS '''
''' le righe BIS verificano la C[1] e non eseguono il POP della label MPLS '''
''' metadata = 1 e' un pacchetto duplicato quindi DROP '''
''' nel caso imposta metadata = 3 cioe' non e' un pacchetto duplicato ma il costo e' maggiore di quello conosciuto, inoltro senza aggiornare stato '''
""" Riga 1 """
# C[0]: MPLS_TC > COSTO MEMORIZZATO -> HF[1] > FD[0]
# MetaData: 1 -> Pacchetto duplicato
# azione DROP
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=0,
metadata=1)
actions = [osparser.OFPExpActionSetState(state=1, table_id=4)]
self.add_flow(datapath=datapath,
table_id=4,
priority=1198,
match=match,
actions=actions)
""" Riga 2 """
# C[0]: MPLS_TC > COSTO MEMORIZZATO -> HF[1] > FD[0]
# MetaData: 0 -> Pacchetto NON duplicato
# SetState(1)
# WriteMetadata = 3 -> pacchetto da percorso peggiore ma NON duplicato
# azione GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=0,
condition1=0,
metadata=0)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
ofparser.OFPActionPopMpls()
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=3,
metadata_mask=0xFFFFFFFF),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=198,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Riga 2 BIS """
# C[0]: MPLS_TC > COSTO MEMORIZZATO -> HF[1] > FD[0]
# MetaData: 0 -> Pacchetto NON duplicato
# SetState(1)
# WriteMetadata = 3 -> pacchetto da percorso peggiore ma NON duplicato
# azione GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=0,
condition1=1,
metadata=0)
actions = [osparser.OFPExpActionSetState(state=1, table_id=4)]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=3,
metadata_mask=0xFFFFFFFF),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=198,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Riga 3 """
# C[0]: MPLS_TC <= COSTO MEMORIZZATO -> HF[1] <= FD[0]
# FD[0] = HF[1] -> COSTO MEMORIZZATO = MPLS_TC
# SetState(1)
# azione GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=1,
condition1=0)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0),
ofparser.OFPActionPopMpls()
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=98,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Riga 3 BIS """
# C[0]: MPLS_TC <= COSTO MEMORIZZATO -> HF[1] <= FD[0]
# FD[0] = HF[1] -> COSTO MEMORIZZATO = MPLS_TC
# SetState(1)
# azione GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=1,
condition1=1)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=98,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Riga 4 """
# FD[0] = HF[1] -> COSTO MEMORIZZATO = MPLS_TC
# SetState(1)
# azione GOTO Tab 3
match = ofparser.OFPMatch(state=0, eth_type=0x8847, condition1=0)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0),
ofparser.OFPActionPopMpls()
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Riga 4 BIS """
# FD[0] = HF[1] -> COSTO MEMORIZZATO = MPLS_TC
# SetState(1)
# azione GOTO Tab 3
match = ofparser.OFPMatch(state=0, eth_type=0x8847, condition1=1)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
'''# ####################### TAB 5 semplicemente MAC Learning '''
''' Mac Learning ampliato per gestire i metadata = 1 o metadata = 3 '''
''' metadata = 1 se e' arrivato fin qui significa che il costo nel pacchetto e' minore di quello conosciuto (ha seguito un percorso migliore) AGGIORNARE e DROP'''
''' metadata = 3 non e' un pacchetto duplicato ma il costo del percorso seguito e' peggiore di quello conosciuto NON AGGIORNARE e INOLTRA '''
# Per ogni input port, per ogni stato
for i in range(1, N + 1):
for s in range(N + 1):
match = ofparser.OFPMatch(in_port=i, state=s)
if s == 0:
out_port = ofproto.OFPP_FLOOD #serve la flood, dipende se sto su S1 o S6
else:
out_port = s
# actions = [osparser.OFPExpActionSetState(state=i, table_id=5, hard_timeout=10),
actions = [
osparser.OFPExpActionSetState(state=i, table_id=5),
ofparser.OFPActionOutput(out_port)
]
self.add_flow(datapath=datapath,
table_id=5,
priority=0,
match=match,
actions=actions)
# Configuro le entry con azione DROP per i pacchetti duplicati (con metadata = 1)
match = ofparser.OFPMatch(in_port=i, metadata=1)
# actions = [osparser.OFPExpActionSetState(state=i, table_id=5, hard_timeout=10)]
actions = [osparser.OFPExpActionSetState(state=i, table_id=5)]
self.add_flow(datapath=datapath,
table_id=5,
priority=1198,
match=match,
actions=actions)
# Per ogni stato
for s in range(N + 1):
match = ofparser.OFPMatch(state=s, metadata=3)
if s == 0:
out_port = ofproto.OFPP_FLOOD #serve la flood, dipende se sto su S1 o S6
else:
out_port = s
# Configuro le entry per l'output(in_port) senza aggiornare lo stato
actions = [ofparser.OFPActionOutput(out_port)]
self.add_flow(datapath=datapath,
table_id=5,
priority=198,
match=match,
actions=actions)
def install_leaves(self, datapath):
##################################### TABLE 0: DISPATCHING ##################################################
######################### TABLE 0 CONFIG ###############
req = bebaparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=0,
stateful=1)
datapath.send_msg(req)
""" Set lookup extractor = {eth_dst} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_IN_PORT],
table_id=0)
datapath.send_msg(req)
""" Set update extractor = {eth_dst} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_IN_PORT],
table_id=0)
datapath.send_msg(req)
""" Field extractor for mpls label """
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=0,
extractor_id=0,
field=ofproto.OXM_OF_MPLS_LABEL)
datapath.send_msg(req)
""" Field extractor for timestamp """
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=0,
extractor_id=1,
field=bebaproto.OXM_EXP_TIMESTAMP)
datapath.send_msg(req)
""" Packet counter_max for designing probe frequency """
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=0, global_data_variable_id=0, value=9)
datapath.send_msg(req)
""" Condition C0: if counter reaches counter_max, then trigger probe sending """
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
table_id=0,
condition_id=0,
condition=bebaproto.CONDITION_GTE,
operand_1_fd_id=0,
operand_2_gd_id=0)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
table_id=0,
condition_id=3,
condition=bebaproto.CONDITION_GTE,
operand_1_fd_id=0,
operand_2_gd_id=0)
datapath.send_msg(req)
##################################### TABLE 0 FLOWS ##################################################
""" RECEIVE PROBE ACTION """
""" When a probe is received tab0 sends it to tab3"""
""" match: MPLS """
""" no action """
""" instruction: goto tab3"""
match = ofparser.OFPMatch(eth_type=0x8847)
instructions = [ofparser.OFPInstructionGotoTable(3)]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=200,
match=match,
instructions=instructions)
datapath.send_msg(mod)
for i in UPPER_PORTS:
""" Writes metadata 1 if C0 is true (i.e. if it's time to send probe) to inform the Util Table (2) """
match = ofparser.OFPMatch(in_port=i, condition0=1)
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=0,
opcode=bebaproto.OPCODE_SUB,
output_fd_id=0,
operand_1_fd_id=0,
operand_2_gd_id=0),
ofparser.OFPActionPushMpls()
] #push mpls for tab 2
instructions = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=1,
metadata_mask=0xffffffff),
ofparser.OFPInstructionGotoTable(2)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=50,
match=match,
instructions=instructions)
datapath.send_msg(mod)
""" If C0 is false, update the counter (i++) and go to Util Table for ewma measuring """
match = ofparser.OFPMatch(in_port=i, condition0=0)
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=0,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=0,
operand_1_fd_id=0,
operand_2_cost=1)
]
instructions = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(2)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=30,
match=match,
instructions=instructions)
datapath.send_msg(mod)
""" For packets from down ports (attached to hosts): go to ToR Discovery table (1) """
for i in DOWN_PORTS:
match = ofparser.OFPMatch(in_port=i)
instructions = [ofparser.OFPInstructionGotoTable(1)]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=0,
match=match,
instructions=instructions)
datapath.send_msg(mod)
for i in [0, 1]:
match = ofparser.OFPMatch(in_port=3,
eth_type=0x0800,
ip_proto=6,
tcp_dst=10000 + i)
actions = [ofparser.OFPActionOutput(i + 1)]
self.add_flow(datapath=datapath,
table_id=0,
priority=200,
match=match,
actions=actions)
match = ofparser.OFPMatch(in_port=3,
eth_type=0x0800,
ip_proto=6,
tcp_src=10000 + i)
actions = [ofparser.OFPActionOutput(i + 1)]
self.add_flow(datapath=datapath,
table_id=0,
priority=200,
match=match,
actions=actions)
######################## TABLE 1 ToR DISCOVERY #########################################################
# this cycle writes metadata specifying to which leaf belongs the packet
for i in LEAVES:
if (i != datapath.id):
match = ofparser.OFPMatch(eth_dst=MAC_ADDRS[i - 1])
instructions = [
ofparser.OFPInstructionWriteMetadata(
metadata=i, metadata_mask=0xffffffff),
ofparser.OFPInstructionGotoTable(3)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=1,
priority=0,
match=match,
instructions=instructions)
datapath.send_msg(mod)
######################### TABLE 2: ACTIVE PROBING ######################################################
################### TABLE 2 CONFIG #########
req = bebaparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=2,
stateful=1)
datapath.send_msg(req)
""" Set lookup extractor = {IN_PORT} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_IN_PORT],
table_id=2)
datapath.send_msg(req)
""" Set update extractor = {IN_PORT} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_IN_PORT],
table_id=2)
datapath.send_msg(req)
# multiply factor: convert to kbit/s
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=2,
global_data_variable_id=0,
value=8000)
datapath.send_msg(req)
# number of averaging samples
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=2, global_data_variable_id=3, value=40)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=2,
extractor_id=1,
field=bebaproto.OXM_EXP_TIMESTAMP)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=2,
extractor_id=2,
field=bebaproto.OXM_EXP_PKT_LEN)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
condition=bebaproto.CONDITION_GTE,
condition_id=0,
table_id=2,
operand_1_fd_id=4,
operand_2_gd_id=3)
datapath.send_msg(req)
############################### TABLE 2 FLOWS #############################
""" For every packet coming from spine ports, calculates ewma """
for i in UPPER_PORTS:
#simply ewma measuring
match = ofparser.OFPMatch(in_port=i, condition0=1)
actions_ewma_1 = [ #calculates deltaT: FDV[1]=HF[1]-FDV[0]=TS_NOW - TS_LAST
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_SUB,
output_fd_id=1,
operand_1_hf_id=1,
operand_2_fd_id=0),
#calculates rate: R = (bytes / deltaT_us) * 1000 kB/s
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_MUL,
output_fd_id=2,
operand_1_fd_id=2,
operand_2_gd_id=0),
#stores the result in FDV[3]: THE FLOW ESTIMATED RATE
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_DIV,
output_fd_id=2,
operand_1_fd_id=2,
operand_2_fd_id=1),
#calculates ewma
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_EWMA,
output_fd_id=3,
operand_1_fd_id=3,
operand_2_cost=bebaproto.EWMA_PARAM_0250,
operand_3_fd_id=2),
#saves current timestamp
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0),
#counter returns to zero
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_SUB,
output_fd_id=4,
operand_1_fd_id=4,
operand_2_fd_id=4),
# saves in GDV[i] the ewma
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=i,
operand_1_fd_id=3,
operand_2_cost=0)
]
self.add_flow(datapath=datapath,
table_id=2,
priority=30,
match=match,
actions=actions_ewma_1 +
[ofparser.OFPActionOutput(3)])
match = ofparser.OFPMatch(in_port=i, condition0=0)
actions_ewma_2 = [
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=2,
operand_1_fd_id=2,
operand_2_hf_id=2),
bebaparser.OFPExpActionSetDataVariable(
table_id=2,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_fd_id=4,
operand_2_cost=1)
]
self.add_flow(datapath=datapath,
table_id=2,
priority=30,
match=match,
actions=actions_ewma_2 +
[ofparser.OFPActionOutput(3)])
""" PROBES: When it matches metadata=1 it means that this packet has to be duplicated to piggyback on it the probe """
#group mod for packet duplication and probing
buckets = []
actions1 = [
ofparser.OFPActionSetField(mpls_tc=datapath.id), #the GDV[i]
bebaparser.OFPExpActionWriteContextToField(
src_type=bebaproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=i,
dst_field=ofproto.OXM_OF_MPLS_LABEL),
ofparser.OFPActionOutput(ofproto.OFPP_IN_PORT)
]
buckets.append(ofparser.OFPBucket(actions=actions1))
actions1 = [
ofparser.OFPActionSetField(
mpls_tc=datapath.id), #the GDV[other]
bebaparser.OFPExpActionWriteContextToField(
src_type=bebaproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=(1 if i == 2 else 2),
dst_field=ofproto.OXM_OF_MPLS_LABEL),
ofparser.OFPActionOutput((1 if i == 2 else 2))
]
buckets.append(ofparser.OFPBucket(actions=actions1))
req = ofparser.OFPGroupMod(datapath=datapath,
type_=ofproto.OFPGT_ALL,
group_id=i,
buckets=buckets)
datapath.send_msg(req)
# actual match and actions: group action, popMpls() and output(3)
match = ofparser.OFPMatch(in_port=i, eth_type=0x8847, metadata=1)
actions = [
ofparser.OFPActionGroup(i),
ofparser.OFPActionPopMpls(),
ofparser.OFPActionOutput(3)
]
self.add_flow(datapath=datapath,
table_id=2,
priority=100,
match=match,
actions=actions)
for j in [0, 1]:
match = ofparser.OFPMatch(in_port=i,
eth_type=0x0800,
ip_proto=6,
tcp_dst=10000 + j,
condition0=1)
actions = actions_ewma_1 + [ofparser.OFPActionOutput(3)]
self.add_flow(datapath=datapath,
table_id=2,
priority=150,
match=match,
actions=actions)
match = ofparser.OFPMatch(in_port=i,
eth_type=0x0800,
ip_proto=6,
tcp_src=10000 + j,
condition0=1)
actions = actions_ewma_1 + [ofparser.OFPActionOutput(3)]
self.add_flow(datapath=datapath,
table_id=2,
priority=150,
match=match,
actions=actions)
match = ofparser.OFPMatch(in_port=i,
eth_type=0x0800,
ip_proto=6,
tcp_dst=10000 + j,
condition0=0)
actions = actions_ewma_2 + [ofparser.OFPActionOutput(3)]
self.add_flow(datapath=datapath,
table_id=2,
priority=150,
match=match,
actions=actions)
match = ofparser.OFPMatch(in_port=i,
eth_type=0x0800,
ip_proto=6,
tcp_src=10000 + j,
condition0=0)
actions = actions_ewma_2 + [ofparser.OFPActionOutput(3)]
self.add_flow(datapath=datapath,
table_id=2,
priority=150,
match=match,
actions=actions)
######################## TABLE 3: FORWARDING ##############################################################
######################## TABLE 3 CONFIG #####################################################################
##### GDV[1] contains path utilization to dest 1 on port 1
##### GDV[2] contains path utilization to dest 2 on port 1
##### GDV[3] contains path utilization to dest 1 on port 2
##### GDV[4] contains path utilization to dest 2 on port 2
req = bebaparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=3,
stateful=1)
datapath.send_msg(req)
""" Set lookup extractor = {ETH_DST IP_PROTO TCP_DST} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[
ofproto.OXM_OF_IPV4_SRC, ofproto.OXM_OF_IPV4_DST,
ofproto.OXM_OF_TCP_SRC, ofproto.OXM_OF_TCP_DST
],
table_id=3)
datapath.send_msg(req)
""" Set update extractor = {} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[
ofproto.OXM_OF_IPV4_SRC, ofproto.OXM_OF_IPV4_DST,
ofproto.OXM_OF_TCP_SRC, ofproto.OXM_OF_TCP_DST
],
table_id=3)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=0,
field=ofproto.OXM_OF_MPLS_LABEL)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=1,
field=bebaproto.OXM_EXP_TIMESTAMP)
datapath.send_msg(req)
req = bebaparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=2,
field=bebaproto.OXM_EXP_PKT_LEN)
datapath.send_msg(req)
# GDV[0] = multiply factor
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=3,
global_data_variable_id=0,
value=8000)
datapath.send_msg(req)
# GDV[6] = packets needed for average
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=3,
global_data_variable_id=6,
value=40 - 1)
datapath.send_msg(req)
# GDV[5] = elephant flow threshold
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=3,
global_data_variable_id=5,
value=2000) # 2000 kb/s
datapath.send_msg(req)
# Lower flow threshold
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=3,
global_data_variable_id=7,
value=300)
datapath.send_msg(req)
for i in [1, 2, 3]:
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=3,
global_data_variable_id=i,
value=0)
datapath.send_msg(req)
#################################### TABLE 3 FLOWS ###################################
# many conditions as the number of LEAVES-1
# for i in LEAVES except datapath.id: create condition[i]
# in the case of 2 Spines. For more spines the configuration becomes more complex
for destLeaf in [1, 2]:
# C[destinationLeaf]: which port is less utilized?
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
condition=bebaproto.CONDITION_LTE,
condition_id=destLeaf,
table_id=3,
operand_1_gd_id=destLeaf,
operand_2_gd_id=destLeaf + 2)
datapath.send_msg(req)
# C[0], has the flow exceeded threshold? i.e. flow_rate >= threshold => FDV[3] >= GDV[5]
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
condition=bebaproto.CONDITION_GTE,
condition_id=0,
table_id=3,
operand_1_fd_id=3,
operand_2_gd_id=5)
datapath.send_msg(req)
# C[3], is the other flow lower than a value? FDV[4] < GDV[7] ?
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
condition=bebaproto.CONDITION_LTE,
condition_id=3,
table_id=3,
operand_1_fd_id=4,
operand_2_gd_id=7)
datapath.send_msg(req)
# C[4]: did the counter reach counterMax? FDV[5] = GDV[6] ?
req = bebaparser.OFPExpMsgSetCondition(
datapath=datapath,
condition=bebaproto.CONDITION_EQ,
condition_id=4,
table_id=3,
operand_1_fd_id=5,
operand_2_gd_id=6)
datapath.send_msg(req)
# leaf number dependent flows
if datapath.id == 1:
#LEAF 1 new flows: fetch the destination leaf and check the appropriate condition
match1true = ofparser.OFPMatch(metadata=2, condition1=1,
state=0) #dst=2, port 1
match2true = ofparser.OFPMatch(metadata=3, condition2=1,
state=0) #dst=3, port 1
match1false = ofparser.OFPMatch(metadata=2, condition1=0,
state=0) #dst=2, port 2
match2false = ofparser.OFPMatch(metadata=3, condition2=0,
state=0) #dst=3, port 2
elif datapath.id == 2:
#LEAF 2 new flows: fetch the destination leaf and check the appropriate condition
match1true = ofparser.OFPMatch(metadata=1, condition1=1,
state=0) #dst=1, port 1
match2true = ofparser.OFPMatch(metadata=3, condition2=1,
state=0) #dst=3, port 1
match1false = ofparser.OFPMatch(metadata=1, condition1=0,
state=0) #dst=1, port 2
match2false = ofparser.OFPMatch(metadata=3, condition2=0,
state=0) #dst=3, port 2
elif datapath.id == 3:
#LEAF 3 new flows: fetch the destination leaf and check the appropriate condition
match1true = ofparser.OFPMatch(metadata=1, condition1=1,
state=0) #dst=1, port 1
match2true = ofparser.OFPMatch(metadata=2, condition2=1,
state=0) #dst=2, port 1
match1false = ofparser.OFPMatch(metadata=1, condition1=0,
state=0) #dst=1, port 2
match2false = ofparser.OFPMatch(metadata=2, condition2=0,
state=0) #dst=2, port 2
#if port 1 is better, set_state(1) and output 1
actions_true = [
bebaparser.OFPExpActionSetState(state=1,
table_id=3,
idle_timeout=5),
ofparser.OFPActionOutput(1)
]
#if port 2 is better, set_state(2) and output 2
actions_false = [
bebaparser.OFPExpActionSetState(state=2,
table_id=3,
idle_timeout=5),
ofparser.OFPActionOutput(2)
]
self.add_flow(datapath=datapath,
table_id=3,
priority=20,
match=match1true,
actions=actions_true)
self.add_flow(datapath=datapath,
table_id=3,
priority=20,
match=match2true,
actions=actions_true)
self.add_flow(datapath=datapath,
table_id=3,
priority=20,
match=match1false,
actions=actions_false)
self.add_flow(datapath=datapath,
table_id=3,
priority=20,
match=match2false,
actions=actions_false)
""" extract external probes' data and store in GDVs """
match = ofparser.OFPMatch(eth_type=0x8847, mpls_tc=datapath.id)
self.add_flow(datapath=datapath,
table_id=3,
priority=300,
match=match,
actions=[])
for i in UPPER_PORTS:
for leafNo in LEAVES:
match = ofparser.OFPMatch(in_port=i,
eth_type=0x8847,
mpls_tc=leafNo)
""" actions: save in GDVs external probes' data """
if datapath.id == 1:
if leafNo == 2:
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=(1 if i == 1 else 3),
operand_1_hf_id=0,
operand_2_cost=0)
]
elif leafNo == 3:
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=(2 if i == 1 else 4),
operand_1_hf_id=0,
operand_2_cost=0)
]
elif datapath.id == 2:
if leafNo == 1:
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=(1 if i == 1 else 3),
operand_1_hf_id=0,
operand_2_cost=0)
]
elif leafNo == 3:
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=(2 if i == 1 else 4),
operand_1_hf_id=0,
operand_2_cost=0)
]
elif datapath.id == 3:
if leafNo == 1:
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=(1 if i == 1 else 3),
operand_1_hf_id=0,
operand_2_cost=0)
]
elif leafNo == 2:
actions = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=(2 if i == 1 else 4),
operand_1_hf_id=0,
operand_2_cost=0)
]
self.add_flow(datapath=datapath,
table_id=3,
priority=200,
match=match,
actions=actions)
for s in UPPER_PORTS:
for metadata in LEAVES:
# normal conditions, installed flows continue flowing, calculates ewma if counter reaches max
match = ofparser.OFPMatch(in_port=3,
state=s,
metadata=metadata,
condition4=1)
actions_ewma = [ #calculates deltaT: FDV[1]=HF[1]-FDV[0]=TS_NOW - TS_LAST
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUB,
output_fd_id=1,
operand_1_hf_id=1,
operand_2_fd_id=0),
#calculates rate: R = (bytes / deltaT_us) * 1000 kB/s
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_MUL,
output_fd_id=2,
operand_1_fd_id=2,
operand_2_gd_id=0),
#stores the result in FDV[3]: THE FLOW ESTIMATED RATE
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_DIV,
output_fd_id=2,
operand_1_fd_id=2,
operand_2_fd_id=1),
#calculates ewma
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_EWMA,
output_fd_id=3,
operand_1_fd_id=3,
operand_2_cost=bebaproto.EWMA_PARAM_0250,
operand_3_fd_id=2),
#saves current timestamp
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0),
#counter returns to zero
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUB,
output_fd_id=5,
operand_1_fd_id=5,
operand_2_fd_id=5)
]
# FDV[4] = flow's alternative path utilization
if datapath.id == 1:
if metadata == 2:
actions_ewma += [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_gd_id=(1 if s == 2 else 3),
operand_2_cost=0)
]
elif metadata == 3:
actions_ewma += [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_gd_id=(2 if s == 2 else 4),
operand_2_cost=0)
]
elif datapath.id == 2:
if metadata == 1:
actions_ewma += [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_gd_id=(1 if s == 2 else 3),
operand_2_cost=0)
]
elif metadata == 3:
actions_ewma += [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_gd_id=(2 if s == 2 else 4),
operand_2_cost=0)
]
elif datapath.id == 3:
if metadata == 1:
actions_ewma += [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_gd_id=(1 if s == 2 else 3),
operand_2_cost=0)
]
elif metadata == 2:
actions_ewma += [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=4,
operand_1_gd_id=(2 if s == 2 else 4),
operand_2_cost=0)
]
actions = actions_ewma + [ofparser.OFPActionOutput(s)]
self.add_flow(datapath=datapath,
table_id=3,
priority=30,
match=match,
actions=actions)
# normal conditions
match = ofparser.OFPMatch(in_port=3,
state=s,
metadata=metadata,
condition4=0)
actions_ewma_bg = [
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=2,
operand_1_fd_id=2,
operand_2_hf_id=2),
bebaparser.OFPExpActionSetDataVariable(
table_id=3,
opcode=bebaproto.OPCODE_SUM,
output_fd_id=5,
operand_1_fd_id=5,
operand_2_cost=1)
]
actions = actions_ewma_bg + [ofparser.OFPActionOutput(s)]
self.add_flow(datapath=datapath,
table_id=3,
priority=30,
match=match,
actions=actions)
########### match for extended states: same thing as in normal states but evaluate condition0 ##########
match = ofparser.OFPMatch(in_port=3,
state=s + (1 << 5),
metadata=metadata,
condition0=1,
condition4=1)
actions = actions_ewma + [ofparser.OFPActionOutput(s)]
self.add_flow(datapath=datapath,
table_id=3,
priority=35,
match=match,
actions=actions)
match = ofparser.OFPMatch(in_port=3,
state=s + (1 << 5),
metadata=metadata,
condition0=1,
condition4=0)
actions = actions_ewma_bg + [ofparser.OFPActionOutput(s)]
self.add_flow(datapath=datapath,
table_id=3,
priority=35,
match=match,
actions=actions)
############# condition[0] and [3] are verified, (i.e. big flow) change port ###########
match = ofparser.OFPMatch(in_port=3,
state=s,
condition0=1,
condition3=1)
actions = [
bebaparser.OFPExpActionSetState(
state=(1 if s == 2 else 2) + (1 << 5),
table_id=3,
idle_timeout=5),
ofparser.OFPActionOutput(1 if s == 2 else 2)
]
self.add_flow(datapath=datapath,
table_id=3,
priority=40,
match=match,
actions=actions)
########### if the flow returns to a rate under the threshold #############################
match = ofparser.OFPMatch(in_port=3,
state=s + (1 << 5),
condition0=0)
actions = [
bebaparser.OFPExpActionSetState(state=s,
table_id=3,
idle_timeout=5),
ofparser.OFPActionOutput(s)
]
self.add_flow(datapath=datapath,
table_id=3,
priority=50,
match=match,
actions=actions)
def install_edge(self, datapath):
""" Table 0 is stateless """
""" Set table 1 as stateful for GD"""
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=1,
stateful=1)
datapath.send_msg(req)
""" Set table 3 as stateful """
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=3,
stateful=1)
datapath.send_msg(req)
""" Set table 4 as stateful """
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=4,
stateful=1)
datapath.send_msg(req)
""" Set table 5 as stateful """
req = osparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=5,
stateful=1)
datapath.send_msg(req)
############################### LOOKUP/UPDATE ################
""" Tab1 """
""" Don't care """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=1)
datapath.send_msg(req)
""" Don't care """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=1)
datapath.send_msg(req)
""" Tab3 """
""" Set lookup extractor = {MPLS_label} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_MPLS_LABEL],
table_id=3)
datapath.send_msg(req)
""" Set update extractor = {MPLS_label} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_MPLS_LABEL],
table_id=3)
datapath.send_msg(req)
""" Tab4 """
""" Set lookup extractor = {MAC_SRC} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=4)
datapath.send_msg(req)
""" Set update extractor = {MAC_SRC} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=4)
datapath.send_msg(req)
""" Tab5 """
""" Set lookup extractor = {MAC_DST} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_DST],
table_id=5)
datapath.send_msg(req)
""" Set update extractor = {MAC_SRC} """
req = osparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=osproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=5)
datapath.send_msg(req)
########################### SET HF GD DATA VARIABLE TAB 1 ############################################
''' GD[0] = datapath.id<<6 + sequence number'''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=1,
global_data_variable_id=0,
value=(datapath.id << 6) + 1)
datapath.send_msg(req)
########################### SET HF GD DATA VARIABLE TAB 3 ############################################
''' HF[0] = OXM_OF_MPLS_LABEL [id_pkt] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=0,
field=ofproto.OXM_OF_MPLS_LABEL)
datapath.send_msg(req)
''' HF[1] = OXM_OF_MPLS_TC [linkWeight] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=3,
extractor_id=1,
field=ofproto.OXM_OF_MPLS_TC)
datapath.send_msg(req)
''' GD[0] = 0 '''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=3, global_data_variable_id=0, value=0)
datapath.send_msg(req)
''' GD[1] = datapath.id '''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=3, global_data_variable_id=1, value=0)
datapath.send_msg(req)
########################### SET HF GD DATA VARIABLE TAB 4 ############################################
''' HF[0] = OXM_OF_MPLS_LABEL [id_pkt] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=4,
extractor_id=0,
field=ofproto.OXM_OF_MPLS_LABEL)
datapath.send_msg(req)
''' HF[1] = OXM_OF_MPLS_TC [linkWeight] '''
req = osparser.OFPExpMsgHeaderFieldExtract(
datapath=datapath,
table_id=4,
extractor_id=1,
field=ofproto.OXM_OF_MPLS_TC)
datapath.send_msg(req)
''' GD[0] = datapath.id '''
req = osparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=4, global_data_variable_id=0, value=1)
datapath.send_msg(req)
########################### SET CONDITION TAB 4 ############################################
# condition 0: MPLS_TC <= KNOWN WEIGHT (FD[0])
# condition 0: HF[1] <= FD[0] ?
req = osparser.OFPExpMsgSetCondition(datapath=datapath,
table_id=4,
condition_id=0,
condition=osproto.CONDITION_LTE,
operand_1_hf_id=1,
operand_2_fd_id=0)
datapath.send_msg(req)
# condition 1: MPLS_TC <= 1 --> first hop
# condition 1: HF[1] <= GD[0] ?
req = osparser.OFPExpMsgSetCondition(datapath=datapath,
table_id=4,
condition_id=1,
condition=osproto.CONDITION_LTE,
operand_1_hf_id=1,
operand_2_gd_id=0)
datapath.send_msg(req)
''' ####################### TAB 0 PushLabelMPLS '''
# Input from host port (HOST_PORT) push label mpls e GOTO Tab 1
match = ofparser.OFPMatch(in_port=HOST_PORT)
actions = [ofparser.OFPActionPushMpls()]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(1)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
match = ofparser.OFPMatch()
actions = []
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(1)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
''' ####################### TAB 1 mark pkt with ID_PKT '''
# Set label_mpls: GD[0] + 1 -> (id_switch << 6) + 1
match = ofparser.OFPMatch(eth_type=0x8847, mpls_label=0)
actions = [
osparser.OFPExpActionWriteContextToField(
src_type=osproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=0,
dst_field=ofproto.OXM_OF_MPLS_LABEL),
osparser.OFPExpActionSetDataVariable(table_id=1,
opcode=osproto.OPCODE_SUM,
output_gd_id=0,
operand_1_gd_id=0,
operand_2_cost=1)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(2)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=1,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
match = ofparser.OFPMatch(eth_type=0x8847)
actions = []
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(2)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=1,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
''' ####################### TAB 2 '''
match = ofparser.OFPMatch(eth_type=0x8847)
actions = []
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(3)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=2,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
'''####################### TAB 3 Check duplicate, State: mpls_label'''
""" Line 1 """
# GD[0] = HF[1] + 1 -> MPLS_TC + 1
# HF [1] = GD[0] -> MPLS_TC = GD[0]
# WriteMetadata = 1 -> duplicate pkt
# SetState(1)
# GOTO Tab 2
match = ofparser.OFPMatch(state=1, eth_type=0x8847)
actions = [
osparser.OFPExpActionSetDataVariable(table_id=3,
opcode=osproto.OPCODE_SUM,
output_gd_id=0,
operand_1_hf_id=1,
operand_2_cost=1),
osparser.OFPExpActionWriteContextToField(
src_type=osproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=0,
dst_field=ofproto.OXM_OF_MPLS_TC),
# osparser.OFPExpActionSetState(state=1, table_id=3, idle_timeout=15)]
osparser.OFPExpActionSetState(state=1, table_id=3)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=1,
metadata_mask=0xFFFFFFFF),
ofparser.OFPInstructionGotoTable(4)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=3,
priority=1198,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Line 2 """
# GD[0] = HF[1] + 1 -> MPLS_TC + 1
# HF [1] = GD[0] -> MPLS_TC = GD[0]
# SetState(1)
# GOTO Tab 4
match = ofparser.OFPMatch(state=0, eth_type=0x8847)
actions = [
osparser.OFPExpActionSetDataVariable(table_id=3,
opcode=osproto.OPCODE_SUM,
output_gd_id=0,
operand_1_hf_id=1,
operand_2_cost=1),
osparser.OFPExpActionWriteContextToField(
src_type=osproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=0,
dst_field=ofproto.OXM_OF_MPLS_TC),
osparser.OFPExpActionSetState(state=1, table_id=3)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(4)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=3,
priority=198,
match=match,
instructions=inst)
datapath.send_msg(mod)
'''# ####################### TAB 4 check condition C[0] e C[1]'''
""" Line 1 """
# C[0]: MPLS_TC > KNOWN WEIGHT -> HF[1] > FD[0]
# MetaData: 1 -> duplicate pkt
# action DROP
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=0,
metadata=1)
actions = [osparser.OFPExpActionSetState(state=1, table_id=4)]
self.add_flow(datapath=datapath,
table_id=4,
priority=1198,
match=match,
actions=actions)
""" Line 2 """
# C[0]: MPLS_TC > KNOWN WEIGHT -> HF[1] > FD[0]
# MetaData: 0 -> NOT duplicate
# SetState(1)
# WriteMetadata = 3 -> WORSE PATH, NOT duplicate
# action GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=0,
condition1=0,
metadata=0)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
ofparser.OFPActionPopMpls()
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=3,
metadata_mask=0xFFFFFFFF),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=198,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Line 2 BIS """
# C[0]: MPLS_TC > KNOWN WEIGHT -> HF[1] > FD[0]
# MetaData: 0 -> NOT duplicate
# SetState(1)
# WriteMetadata = 3 -> WORSE PATH, NOT duplicate
# action GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=0,
condition1=1,
metadata=0)
actions = [osparser.OFPExpActionSetState(state=1, table_id=4)]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionWriteMetadata(metadata=3,
metadata_mask=0xFFFFFFFF),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=198,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Line 3 """
# C[0]: MPLS_TC <= KNOWN WEIGHT -> HF[1] <= FD[0]
# FD[0] = HF[1] -> KNOWN WEIGHT = MPLS_TC
# SetState(1)
# action GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=1,
condition1=0)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0),
ofparser.OFPActionPopMpls()
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=98,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Line 3 BIS """
# C[0]: MPLS_TC <= KNOWN WEIGHT -> HF[1] <= FD[0]
# FD[0] = HF[1] -> KNOWN WEIGHT = MPLS_TC
# SetState(1)
# action GOTO Tab 3
match = ofparser.OFPMatch(state=1,
eth_type=0x8847,
condition0=1,
condition1=1)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=98,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Line 4 """
# FD[0] = HF[1] -> KNOWN WEIGHT = MPLS_TC
# SetState(1)
# action GOTO Tab 3
match = ofparser.OFPMatch(state=0, eth_type=0x8847, condition1=0)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0),
ofparser.OFPActionPopMpls()
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" Line 4 BIS """
# FD[0] = HF[1] -> KNOWN WEIGHT = MPLS_TC
# SetState(1)
# action GOTO Tab 3
match = ofparser.OFPMatch(state=0, eth_type=0x8847, condition1=1)
actions = [
osparser.OFPExpActionSetState(state=1, table_id=4),
osparser.OFPExpActionSetDataVariable(table_id=4,
opcode=osproto.OPCODE_SUM,
output_fd_id=0,
operand_1_hf_id=1,
operand_2_cost=0)
]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(5)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=4,
priority=8,
match=match,
instructions=inst)
datapath.send_msg(mod)
'''# ####################### TAB 5 simply MAC Learning '''
''' Mac Learning, check if metadata = 1 or metadata = 3 '''
# For each input port, for each state
for i in range(1, N + 1):
for s in range(N + 1):
match = ofparser.OFPMatch(in_port=i, state=s)
if s == 0:
out_port = ofproto.OFPP_FLOOD
else:
out_port = s
# actions = [osparser.OFPExpActionSetState(state=i, table_id=5, hard_timeout=10),
actions = [
osparser.OFPExpActionSetState(state=i, table_id=5),
ofparser.OFPActionOutput(out_port)
]
self.add_flow(datapath=datapath,
table_id=5,
priority=0,
match=match,
actions=actions)
# DROP duplicate pkt (metadata = 1)
match = ofparser.OFPMatch(in_port=i, metadata=1)
# actions = [osparser.OFPExpActionSetState(state=i, table_id=5, hard_timeout=10)]
actions = [osparser.OFPExpActionSetState(state=i, table_id=5)]
self.add_flow(datapath=datapath,
table_id=5,
priority=1198,
match=match,
actions=actions)
# For each state
for s in range(N + 1):
match = ofparser.OFPMatch(state=s, metadata=3)
if s == 0:
out_port = ofproto.OFPP_FLOOD
else:
out_port = s
actions = [ofparser.OFPActionOutput(out_port)]
self.add_flow(datapath=datapath,
table_id=5,
priority=198,
match=match,
actions=actions)
def switch_features_handler(self, event):
""" switch sent his features, check if Beba supported """
msg = event.msg
datapath = msg.datapath
LOG.info("Configuring switch %d..." % datapath.id)
""" Set table 0 as stateful """
req = bebaparser.OFPExpMsgConfigureStatefulTable(datapath=datapath,
table_id=1,
stateful=1)
datapath.send_msg(req)
""" Set lookup extractor = {eth_src} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_L_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=1)
datapath.send_msg(req)
""" Set update extractor = {eth_src} """
req = bebaparser.OFPExpMsgKeyExtract(
datapath=datapath,
command=bebaproto.OFPSC_EXP_SET_U_EXTRACTOR,
fields=[ofproto.OXM_OF_ETH_SRC],
table_id=1)
datapath.send_msg(req)
###########################################################################################
""" Set GDV[2]=678 """
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath,
table_id=1,
global_data_variable_id=2,
value=678)
datapath.send_msg(req)
""" Set GDV[3]=0 """
req = bebaparser.OFPExpMsgsSetGlobalDataVariable(
datapath=datapath, table_id=1, global_data_variable_id=3, value=0)
datapath.send_msg(req)
""" If any then push(MPLS) & GoToTable(1) """
match = ofparser.OFPMatch()
actions = [ofparser.OFPActionPushMpls()]
inst = [
ofparser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS,
actions),
ofparser.OFPInstructionGotoTable(1)
]
mod = ofparser.OFPFlowMod(datapath=datapath,
table_id=0,
priority=0,
match=match,
instructions=inst)
datapath.send_msg(mod)
""" If MPLS then: forward()
update function: GDV[3] = GDV[3]+1 (i.e. counter = counter+1)
MPLS_LABEL = GDV[2]
MPLS_TC = GDV[3]
"""
match = ofparser.OFPMatch(eth_type=0x8847)
actions = [
bebaparser.OFPExpActionSetDataVariable(table_id=1,
opcode=bebaproto.OPCODE_SUM,
output_gd_id=3,
operand_1_gd_id=3,
operand_2_cost=1),
bebaparser.OFPExpActionWriteContextToField(
src_type=bebaproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=2,
dst_field=ofproto.OXM_OF_MPLS_LABEL),
bebaparser.OFPExpActionWriteContextToField(
src_type=bebaproto.SOURCE_TYPE_GLOBAL_DATA_VAR,
src_id=3,
dst_field=ofproto.OXM_OF_MPLS_TC),
ofparser.OFPActionOutput(ofproto.OFPP_FLOOD)
]
self.add_flow(datapath=datapath,
table_id=1,
priority=0,
match=match,
actions=actions)
"""
def switch_features_handler(self, ev):
datapath = ev.msg.datapath
# ofp = datapath.ofproto
# ofp_parser = datapath.ofproto_parser
from ryu.ofproto import ofproto_v1_3 as ofp
from ryu.ofproto import ofproto_v1_3_parser as ofp_parser
mod = [
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=0,
priority=0,
instructions=[ofp_parser.OFPInstructionGotoTable(table_id=1)]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=0,
priority=1,
match=ofp_parser.OFPMatch(eth_type=ether_types.ETH_TYPE_ARP),
instructions=[ofp_parser.OFPInstructionGotoTable(table_id=3)]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=1,
priority=0,
instructions=[ofp_parser.OFPInstructionGotoTable(table_id=2)]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=1,
priority=1,
match=ofp_parser.OFPMatch(eth_type=ether_types.ETH_TYPE_IP),
instructions=[
ofp_parser.OFPInstructionActions(
type_=ofp.OFPIT_APPLY_ACTIONS,
actions=[
ofp_parser.OFPActionPushMpls(),
# ofp_parser.OFPActionSetField(mpls_label=0x1234),
ofp_parser.OFPActionPushMpls(),
# ofp_parser.OFPActionSetField(mpls_label=0x1235)
]),
ofp_parser.OFPInstructionGotoTable(table_id=3)
]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=1,
priority=2,
match=ofp_parser.OFPMatch(eth_type=ether_types.ETH_TYPE_MPLS,
mpls_bos=0),
instructions=[
ofp_parser.OFPInstructionActions(
type_=ofp.OFPIT_APPLY_ACTIONS,
actions=[
ofp_parser.OFPActionPopMpls(
ether_types.ETH_TYPE_MPLS)
]),
ofp_parser.OFPInstructionGotoTable(table_id=2),
]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=2,
priority=0,
instructions=[ofp_parser.OFPInstructionGotoTable(table_id=3)]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=2,
priority=1,
match=ofp_parser.OFPMatch(eth_type=ether_types.ETH_TYPE_MPLS,
mpls_bos=1),
instructions=[
ofp_parser.OFPInstructionActions(
type_=ofp.OFPIT_APPLY_ACTIONS,
actions=[
ofp_parser.OFPActionPopMpls(
ether_types.ETH_TYPE_IP)
]),
ofp_parser.OFPInstructionGotoTable(table_id=3)
]),
ofp_parser.OFPFlowMod(
datapath=datapath,
table_id=3,
priority=0,
instructions=[
ofp_parser.OFPInstructionActions(
type_=ofp.OFPIT_APPLY_ACTIONS,
actions=[
ofp_parser.OFPActionOutput(
port=ofp.OFPP_CONTROLLER),
ofp_parser.OFPActionOutput(port=ofp.OFPP_FLOOD)
])
])
]
for msg in mod:
datapath.send_msg(msg)
