def test_mac_is_multicast(self):
addr = b'\x01\x23\x45\x67\x89\x0a'
val = True
res = mac.is_multicast(addr)
eq_(val, res)
def test_mac_is_multicast(self):
addr = b"\x01\x23\x45\x67\x89\x0a"
val = True
res = mac.is_multicast(addr)
eq_(val, res)
def mac_addr_is_unicast(mac_addr):
"""Returns True if mac_addr is a unicast Ethernet address.
Args:
mac_addr (str): MAC address.
Returns:
bool: True if a unicast Ethernet address.
"""
mac_bin = haddr_to_bin(mac_addr)
if mac_bin == BROADCAST:
return False
return not is_multicast(mac_bin)
def mac_addr_is_unicast(mac_addr):
"""Returns True if mac_addr is a unicast Ethernet address.
Args:
mac_addr (str): MAC address.
Returns:
bool: True if a unicast Ethernet address.
"""
mac_bin = haddr_to_bin(mac_addr)
if mac_bin == BROADCAST:
return False
return not is_multicast(mac_bin)
def _packet_in_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
dst, src, _eth_type = struct.unpack_from("!6s6sH", buffer(msg.data), 0)
dpid = datapath.id
self.mac_to_port.setdefault(dpid, {})
LOG.info("packet in %s %s %s %s", dpid, haddr_to_str(src), haddr_to_str(dst), msg.in_port)
# learn a mac address to avoid FLOOD next time.
self.mac_to_port[dpid][src] = msg.in_port
broadcast = (dst == mac.BROADCAST) or mac.is_multicast(dst)
if broadcast:
out_port = ofproto.OFPP_FLOOD
LOG.info("broadcast frame, flood and install flow")
elif src != dst:
if dst in self.mac_to_port[dpid]:
out_port = self.mac_to_port[dpid][dst]
else:
LOG.info("out_port not found")
out_port = ofproto.OFPP_FLOOD
else:
self._drop_packet(msg)
return
actions = [datapath.ofproto_parser.OFPActionOutput(out_port)]
# install a flow to avoid packet_in next time
if broadcast or (out_port != ofproto.OFPP_FLOOD):
self.add_flow(datapath, msg.in_port, dst, actions)
out = datapath.ofproto_parser.OFPPacketOut(
datapath=datapath, buffer_id=msg.buffer_id, in_port=msg.in_port, actions=actions
)
datapath.send_msg(out)
def packet_in_handler(self, ev):
self.mac_to_port = dict() # Creacion diccionario vacio
msg = ev.msg # Objeto que representa la estuctura de datos PacketIn.
datapath = msg.datapath # Identificador del datapath correspondiente al switch.
ofproto = datapath.ofproto # Protocolo utilizado que se fija en una etapa
# de negociacion entre controlador y switch
ofp_parser = datapath.ofproto_parser # Parser con la version OF
# correspondiente
in_port = msg.match['in_port'] # Puerto de entrada.
# Ahora analizamos el paquete utilizando las clases de la libreria packet.
pkt = packet.Packet(msg.data)
eth = pkt.get_protocol(ethernet.ethernet)
# Extraemos la MAC de destino
dst = eth.dst
src = eth.src
self.mac_to_port[src] = in_port
if dst in self.mac_to_port.keys():
match = ofp_parser.OFPMatch(eth_dst=dst)
actions = [ofp_parser.OFPActionOutput(self.mac_to_port[dst])]
self.add_flow(datapath, 0, match, actions, msg.buffer_id)
elif haddr_to_bin(dst) == mac.BROADCAST or mac.is_multicast(
haddr_to_bin(dst)):
# Ahora creamos el match
# fijando los valores de los campos
# que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst)
# Creamos el conjunto de acciones: FLOOD
actions = [ofp_parser.OFPActionOutput(ofproto.OFPP_FLOOD)]
self.add_flow(datapath, 0, match, actions, msg.buffer_id)
else:
self.send_packet(datapath, ofproto.OFPP_FLOOD, pkt)
def packet_in_handler(self, ev):
def drop():
LOG.error("\tImplement drop function")
def flood():
LOG.warn("\tFlooding packet")
for (iDpid, switch) in self.G.nodes(data='switch'):
#Initialize ports
ports = []
#Add local port if that is not the originating port
#if (iDpid,ofp.OFPP_LOCAL) != (dpid, in_port):
# ports += [ofp.OFPP_LOCAL]
#Exclude the inter-switch and possible other incoming ports from flooding
ports += [
p.port_no for p in switch.ports
if (iDpid,
p.port_no) != (dpid, in_port) and p.port_no not in [
self.G.get_edge_data(iDpid, jDpid)['port']
for jDpid in self.G.neighbors(iDpid)
]
]
actions = [parser.OFPActionOutput(port, 0) for port in ports]
if iDpid == dpid and buffer_id != None:
LOG.warn(
"\t\tFlooding Originating Switch %d using Buffer ID" %
(iDpid))
req = parser.OFPPacketOut(dp,
buffer_id=buffer_id,
in_port=in_port,
actions=actions)
switch.dp.send_msg(req)
elif len(actions) > 0:
LOG.warn("\t\tFlooding Switch %d" % (iDpid))
req = parser.OFPPacketOut(dp,
buffer_id=ofp.OFP_NO_BUFFER,
in_port=ofp.OFPP_CONTROLLER,
actions=actions,
data=data)
switch.dp.send_msg(req)
def output(tDpid, port):
LOG.warn("\tOutputting packet")
action = parser.OFPActionOutput(port, 0)
if buffer_id != None:
#Drop the packet from the buffer on the incoming switch to prevent buffer overflows.
if tDpid != dpid:
LOG.warn("\tDropping buffer_id on incoming switch %d" %
(dpid))
actions = []
#Or forward if that is also the destination switch.
else:
LOG.warn("\tOutputting via buffer_id on switch %d" %
(tDpid))
actions = [action]
req = parser.OFPPacketOut(dp,
buffer_id=buffer_id,
in_port=in_port,
actions=actions)
dp.send_msg(req)
#Forward packet through data-field.
if buffer_id == None or tDpid != dpid:
LOG.warn("\tOutputting on outgoing switch %d" % (tDpid))
switch = self.G.node[tDpid]['switch']
actions = [action]
req = parser.OFPPacketOut(dp,
buffer_id=ofp.OFP_NO_BUFFER,
in_port=ofp.OFPP_CONTROLLER,
actions=actions,
data=data)
switch.dp.send_msg(req)
msg = ev.msg
dp = msg.datapath
dpid = msg.datapath.id
in_port = msg.match['in_port']
buffer_id = msg.buffer_id
ofp = msg.datapath.ofproto
parser = msg.datapath.ofproto_parser
if msg.reason == ofp.OFPR_NO_MATCH:
reason = 'NO MATCH'
elif msg.reason == ofp.OFPR_ACTION:
reason = 'ACTION'
elif msg.reason == ofp.OFPR_INVALID_TTL:
reason = 'INVALID TTL'
else:
reason = 'unknown'
data = msg.data
pkt = packet.Packet(data)
eth = pkt.get_protocol(ethernet.ethernet)
#LOG.debug("OpenFlowBackupRules: New incoming packet from %s at switch %d, port %d, for reason %s"%(eth.src,dpid,in_port,reason))
if self.CONF.observe_links and eth.ethertype == ether_types.ETH_TYPE_LLDP:
# ignore LLDP related messages IF topology module has been enabled.
#LOG.debug("\tIgnored LLDP packet due to enabled topology module")
return
LOG.warn(
"OpenFlowBackupRules: Accepted incoming packet from %s at switch %d, port %d, for reason %s"
% (eth.src, dpid, in_port, reason))
LOG.debug("\t%s" % (msg))
LOG.debug("\t%s" % (pkt))
SwitchPort = namedtuple('SwitchPort', 'dpid port')
#if in_port not in [port for _,port in self.G.neighbors(dpid, data="port")]:
if in_port not in [
self.G.get_edge_data(dpid, jDpid)['port']
for jDpid in self.G.neighbors(dpid)
]:
# only relearn locations if they arrived from non-interswitch links
self.mac_learning[eth.src] = SwitchPort(
dpid, in_port) #relearn the location of the mac-address
LOG.warn("\tLearned or updated MAC address")
else:
LOG.warn(
"\tIncoming packet from switch-to-switch link, this should NOT occur."
)
#DROP it
if mac.is_multicast(mac.haddr_to_bin(eth.dst)):
#Maybe we should do something with preconfigured broadcast trees, but that is a different problem for now.
flood()
LOG.warn("\tFlooded multicast packet")
elif eth.dst not in self.mac_learning:
flood()
LOG.warn("\tFlooded unicast packet, unknown MAC address location")
#ARP messages are too infrequent and volatile of nature to create flows for, output immediately
elif eth.ethertype == ether_types.ETH_TYPE_ARP:
output(self.mac_learning[eth.dst].dpid,
self.mac_learning[eth.dst].port)
LOG.warn("\tProcessed packet, send to recipient at %s" %
(self.mac_learning[eth.dst], ))
#Create flow and output or forward.
else:
self._install_path(dpid, in_port, pkt)
#Output the first packet to its destination
output(self.mac_learning[eth.dst].dpid,
self.mac_learning[eth.dst].port)
LOG.warn("\tProcessed packet, sent to recipient at %s" %
(self.mac_learning[eth.dst], ))
def packet_in_handler(self, ev):
# LOG.debug('packet in ev %s msg %s', ev, ev.msg)
msg = ev.msg
datapath = msg.datapath
dst, src, _eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
try:
port_nw_id = self.nw.get_network(datapath.id, msg.in_port)
except PortUnknown:
port_nw_id = NW_ID_UNKNOWN
if port_nw_id != NW_ID_UNKNOWN:
# Here it is assumed that the
# (port <-> network id)/(mac <-> network id) relationship
# is stable once the port is created. The port will be destroyed
# before assigning new network id to the given port.
# This is correct nova-network/nova-compute.
try:
# allow external -> known nw id change
self.mac2net.add_mac(src, port_nw_id, NW_ID_EXTERNAL)
except MacAddressDuplicated:
LOG.warn(
'mac address %s is already in use.'
' So (dpid %s, port %s) can not use it', haddr_to_str(src),
datapath.id, msg.in_port)
#
# should we install drop action pro-actively for future?
#
self._drop_packet(msg)
return
old_port = self.mac2port.port_add(datapath.id, msg.in_port, src)
if old_port is not None and old_port != msg.in_port:
# We really overwrite already learned mac address.
# So discard already installed stale flow entry which conflicts
# new port.
rule = nx_match.ClsRule()
rule.set_dl_dst(src)
datapath.send_flow_mod(
rule=rule,
cookie=0,
command=datapath.ofproto.OFPFC_DELETE,
idle_timeout=0,
hard_timeout=0,
priority=datapath.ofproto.OFP_DEFAULT_PRIORITY,
out_port=old_port)
# to make sure the old flow entries are purged.
datapath.send_barrier()
src_nw_id = self.mac2net.get_network(src, NW_ID_UNKNOWN)
dst_nw_id = self.mac2net.get_network(dst, NW_ID_UNKNOWN)
# we handle multicast packet as same as broadcast
broadcast = (dst == mac.BROADCAST) or mac.is_multicast(dst)
out_port = self.mac2port.port_get(datapath.id, dst)
#
# there are several combinations:
# in_port: known nw_id, external, unknown nw,
# src mac: known nw_id, external, unknown nw,
# dst mac: known nw_id, external, unknown nw, and broadcast/multicast
# where known nw_id: is quantum network id
# external: means that these ports are connected to outside
# unknown nw: means that we don't know this port is bounded to
# specific nw_id or external
# broadcast: the destination mac address is broadcast address
# (or multicast address)
#
# Can the following logic be refined/shortened?
#
# When NW_ID_UNKNOWN is found, registering ports might be delayed.
# So just drop only this packet and not install flow entry.
# It is expected that when next packet arrives, the port is registers
# with some network id
if port_nw_id != NW_ID_EXTERNAL and port_nw_id != NW_ID_UNKNOWN:
if broadcast:
# flood to all ports of external or src_nw_id
self._flood_to_nw_id(msg, src, dst, src_nw_id)
elif src_nw_id == NW_ID_EXTERNAL:
self._modflow_and_drop_packet(msg, src, dst)
return
elif src_nw_id == NW_ID_UNKNOWN:
self._drop_packet(msg)
return
else:
# src_nw_id != NW_ID_EXTERNAL and src_nw_id != NW_ID_UNKNOWN:
#
# try learned mac check if the port is net_id
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst, src_nw_id,
out_port)
elif port_nw_id == NW_ID_EXTERNAL:
if src_nw_id != NW_ID_EXTERNAL and src_nw_id != NW_ID_UNKNOWN:
if broadcast:
# flood to all ports of external or src_nw_id
self._flood_to_nw_id(msg, src, dst, src_nw_id)
elif (dst_nw_id != NW_ID_EXTERNAL
and dst_nw_id != NW_ID_UNKNOWN):
if src_nw_id == dst_nw_id:
# try learned mac
# check if the port is external or same net_id
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(
msg, src, dst, src_nw_id, out_port)
else:
# should not occur?
LOG.debug("should this case happen?")
self._drop_packet(msg)
elif dst_nw_id == NW_ID_EXTERNAL:
# try learned mac
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(
msg, src, dst, src_nw_id, out_port)
else:
assert dst_nw_id == NW_ID_UNKNOWN
LOG.debug("Unknown dst_nw_id")
self._drop_packet(msg)
elif src_nw_id == NW_ID_EXTERNAL:
self._modflow_and_drop_packet(msg, src, dst)
else:
# should not occur?
assert src_nw_id == NW_ID_UNKNOWN
self._drop_packet(msg)
else:
# drop packets
assert port_nw_id == NW_ID_UNKNOWN
self._drop_packet(msg)
def packet_in_handler(self, ev):
# self.logger.debug('packet in ev %s msg %s', ev, ev.msg)
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
dst, src, _eth_type = struct.unpack_from("!6s6sH", buffer(msg.data), 0)
try:
port_nw_id = self.nw.get_network(datapath.id, msg.in_port)
except PortUnknown:
port_nw_id = NW_ID_UNKNOWN
if port_nw_id != NW_ID_UNKNOWN:
# Here it is assumed that the
# (port <-> network id)/(mac <-> network id) relationship
# is stable once the port is created. The port will be destroyed
# before assigning new network id to the given port.
# This is correct nova-network/nova-compute.
try:
# allow external -> known nw id change
self.mac2net.add_mac(src, port_nw_id, NW_ID_EXTERNAL)
except MacAddressDuplicated:
self.logger.warn(
"mac address %s is already in use." " So (dpid %s, port %s) can not use it",
haddr_to_str(src),
datapath.id,
msg.in_port,
)
#
# should we install drop action pro-actively for future?
#
self._drop_packet(msg)
return
old_port = self.mac2port.port_add(datapath.id, msg.in_port, src)
if old_port is not None and old_port != msg.in_port:
# We really overwrite already learned mac address.
# So discard already installed stale flow entry which conflicts
# new port.
rule = nx_match.ClsRule()
rule.set_dl_dst(src)
datapath.send_flow_mod(
rule=rule,
cookie=0,
command=ofproto.OFPFC_DELETE,
idle_timeout=0,
hard_timeout=0,
priority=ofproto.OFP_DEFAULT_PRIORITY,
out_port=old_port,
)
# to make sure the old flow entries are purged.
datapath.send_barrier()
src_nw_id = self.mac2net.get_network(src, NW_ID_UNKNOWN)
dst_nw_id = self.mac2net.get_network(dst, NW_ID_UNKNOWN)
# we handle multicast packet as same as broadcast
broadcast = (dst == mac.BROADCAST) or mac.is_multicast(dst)
out_port = self.mac2port.port_get(datapath.id, dst)
#
# there are several combinations:
# in_port: known nw_id, external, unknown nw,
# src mac: known nw_id, external, unknown nw,
# dst mac: known nw_id, external, unknown nw, and broadcast/multicast
# where known nw_id: is quantum network id
# external: means that these ports are connected to outside
# unknown nw: means that we don't know this port is bounded to
# specific nw_id or external
# broadcast: the destination mac address is broadcast address
# (or multicast address)
#
# Can the following logic be refined/shortened?
#
# When NW_ID_UNKNOWN is found, registering ports might be delayed.
# So just drop only this packet and not install flow entry.
# It is expected that when next packet arrives, the port is registers
# with some network id
if port_nw_id != NW_ID_EXTERNAL and port_nw_id != NW_ID_UNKNOWN:
if broadcast:
# flood to all ports of external or src_nw_id
self._flood_to_nw_id(msg, src, dst, src_nw_id)
elif src_nw_id == NW_ID_EXTERNAL:
self._modflow_and_drop_packet(msg, src, dst)
return
elif src_nw_id == NW_ID_UNKNOWN:
self._drop_packet(msg)
return
else:
# src_nw_id != NW_ID_EXTERNAL and src_nw_id != NW_ID_UNKNOWN:
#
# try learned mac check if the port is net_id
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst, src_nw_id, out_port)
elif port_nw_id == NW_ID_EXTERNAL:
if src_nw_id != NW_ID_EXTERNAL and src_nw_id != NW_ID_UNKNOWN:
if broadcast:
# flood to all ports of external or src_nw_id
self._flood_to_nw_id(msg, src, dst, src_nw_id)
elif dst_nw_id != NW_ID_EXTERNAL and dst_nw_id != NW_ID_UNKNOWN:
if src_nw_id == dst_nw_id:
# try learned mac
# check if the port is external or same net_id
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst, src_nw_id, out_port)
else:
# should not occur?
self.logger.debug("should this case happen?")
self._drop_packet(msg)
elif dst_nw_id == NW_ID_EXTERNAL:
# try learned mac
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst, src_nw_id, out_port)
else:
assert dst_nw_id == NW_ID_UNKNOWN
self.logger.debug("Unknown dst_nw_id")
self._drop_packet(msg)
elif src_nw_id == NW_ID_EXTERNAL:
self._modflow_and_drop_packet(msg, src, dst)
else:
# should not occur?
assert src_nw_id == NW_ID_UNKNOWN
self._drop_packet(msg)
else:
# drop packets
assert port_nw_id == NW_ID_UNKNOWN
self._drop_packet(msg)
def packet_in_handler(self, ev):
msg = ev.msg # Objeto que representa la estuctura de datos PacketIn.
datapath = msg.datapath # Identificador del datapath correspondiente al switch.
ofproto = datapath.ofproto # Protocolo utilizado que se fija en una etapa
# de negociacion entre controlador y switch
ofp_parser=datapath.ofproto_parser # Parser con la version OF
# correspondiente
print("===========================================================================")
print("PAQUETE ENTRANTE")
in_port = msg.match['in_port'] # Puerto de entrada.
print("PUERTO: ", in_port)
# Ahora analizamos el paquete utilizando las clases de la libreria packet.
pkt = packet.Packet(msg.data)
eth = pkt.get_protocol(ethernet.ethernet)
print("ETH: ", eth)
# Extraemos la MAC de destino
dst = eth.dst
print("MAC DE DESTINO: ", dst)
#Extramos la MAC de origen
src = eth.src
print("MAC DE ORIGEN: ", src)
if src not in self.mac_to_port.keys():
print("NO TENGO EL ORIGEN")
self.mac_to_port[src]=in_port
if haddr_to_bin(dst) == mac.BROADCAST or mac.is_multicast(haddr_to_bin(dst)):
# Creamos el conjunto de acciones: FLOOD PENE
if eth.ethertype==ether.ETH_TYPE_ARP:
pkt_arp=pkt.get_protocol(arp.arp)
print("ARP POR BROADCAST!!")
#for INTERFACE in self.interfaces_virtuales.keys():
if self.paraipinterfaz(pkt_arp.dst_ip):
print("ES PA TI RESPONDE A ESE ARP MARICONA")
self.ARPPacket(pkt_arp,in_port,datapath)
else:
print("Retransmito ese arp cual swtich normal")
actions = []
print("-------------------------------------------------------")
for j in self.tabla_vlan.keys():
print("Puerto? ", j)
if self.tabla_vlan.get(j)==self.tabla_vlan.get(in_port) and j !=in_port :
actions.append(ofp_parser.OFPActionOutput(j))
print("Vlan ", self.tabla_vlan.get(j),"puerto de entrada", in_port, "otros puertos ", j)
# Ahora creamos el match
# fijando los valores de los campos
# que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst,eth_src=src)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
else:
print("BROADCAST NORMAL")
actions = []
print("-------------------------------------------------------")
for j in self.tabla_vlan.keys():
print("Puerto? ", j)
if self.tabla_vlan.get(j)==self.tabla_vlan.get(in_port) and j !=in_port :
actions.append(ofp_parser.OFPActionOutput(j))
print("Vlan ", self.tabla_vlan.get(j),"puerto de entrada", in_port, "otros puertos ", j)
print("-------------------------------------------------------")
# Ahora creamos el match
# fijando los valores de los campos
# que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst,eth_src=src)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
elif self.paramacinterfaz(dst):
#eth = pkt.get_protocol(ethernet.ethernet)
pkt_arp=pkt.get_protocol(arp.arp)
#PROCESAR ARPREPLY PARA LAS INTERFACES VIRTUALES <---------
print("Para la interfaz virtual")
for INTERFACE in self.interfaces_virtuales.keys():
if(self.interfaces_virtuales.get(INTERFACE)[0]==dst):
if eth.ethertype==0x0800: #Si es IP
pkt_ipv4=pkt.get_protocol(ipv4.ipv4)
if self.paraipinterfaz(pkt_ipv4.dst):
pkt_icmp=pkt.get_protocol(icmp.icmp)
if (pkt_icmp): #Si es ICMP
print("ESE IP ES PARA MI, RESPONDERE")
self.ICMPPacket(datapath, in_port, eth, pkt_ipv4, pkt_icmp)
else:
print("ESTO PAQUETE IP NO ES PA MI, LO ENRUTARE")
match = ofp_parser.OFPMatch(eth_dst=self.interfaces_virtuales.get(INTERFACE)[0])
goto = ofp_parser.OFPInstructionGotoTable(1)
mod = ofp_parser.OFPFlowMod(datapath=datapath,priority=0, match=match,table_id=0,instructions=[goto],buffer_id=msg.buffer_id)
#mod = ofp_parser.OFPFlowMod(datapath=datapath,priority=0, match=match,table_id=0,instructions=[goto])
datapath.send_msg(mod)
self.paquete_para_enrutar(ev)
elif eth.ethertype==ether.ETH_TYPE_ARP:
print("UN ARP CON MI NOMBRE :O")
pkt_arp=pkt.get_protocol(arp.arp)
self.ARPPacket(pkt_arp,in_port,datapath)
elif dst not in self.mac_to_port.keys() :
#actions = [ofp_parser.OFPPacketOut(ofproto.OFPP_FLOOD)]
# Creamos el conjunto de acciones: FLOOD PENE
pkt_arp=pkt.get_protocol(arp.arp)
if(pkt_arp):
for INTERFACE in self.interfaces_virtuales.keys():
if eth.ethertype==ether.ETH_TYPE_ARP and self.interfaces_virtuales.get(INTERFACE)[2]==pkt_arp.dst_ip:
print("AL ENRUTAMOVIL! PIRIRIRIRIRIRI")
self.ARPPacket(pkt_arp,in_port,datapath)
else:
actions = []
print("NO CONOZCO LA MAC ", dst)
for i in self.tabla_vlan.keys():
if self.tabla_vlan.get(i)==self.tabla_vlan.get(in_port) and i !=in_port :
actions.append(ofp_parser.OFPActionOutput(i))
print i
print("QUIEN DE LA VLAN ", self.tabla_vlan.get(in_port), " TIENE LA MAC ", dst,"?")
#Aqui esta el fallo en buffer id os dejo el mensaje que sale
req = ofp_parser.OFPPacketOut(datapath=datapath, buffer_id=ofproto.OFP_NO_BUFFER, in_port=in_port, actions=actions, data=msg.data)
print("MANDAMOS REQ")
datapath.send_msg(req)
print("MANDADO!")
elif self.tabla_vlan.get(self.mac_to_port.get(src)) == self.tabla_vlan.get(self.mac_to_port.get(dst)) :
actions = [ofp_parser.OFPActionOutput(self.mac_to_port[dst])]
print("PASANDO PAQUETES DENTRO DE LA VLAN ", self.tabla_vlan.get(self.mac_to_port.get(src)))
# Ahora creamos el match
# fijando los valores de los campos
# que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst,eth_src=src)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
#mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, buffer_id=msg.buffer_id)
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
else: #Si no son de la misma vlan, tira el paquete
#eth = pkt.get_protocol(ethernet.ethernet)
pkt_arp=pkt.get_protocol(arp.arp)
#PROCESAR ARPREPLY PARA LAS INTERFACES VIRTUALES <---------
print("ESTOY EN EL ELSE")
def packet_in_handler(self, ev):
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
ofp_parser=datapath.ofproto_parser
print("===========================================================================")
print("PAQUETE ENTRANTE")
in_port = msg.match['in_port']
print("PUERTO: ", in_port)
# We extract the packet from the data
pkt = packet.Packet(msg.data)
# And we extract the ethernet protocol
eth = pkt.get_protocol(ethernet.ethernet)
src = eth.src #Source MAC
dst = eth.dst #Destiny MAC
print("SOURCE MAC: ", src)
print("DESTINY MAC: ", dst)
if src not in self.mac_to_port.keys():
print("I DON'T KNOW THAT MAC, SAVING MAC-PORT")
self.mac_to_port[src]=in_port
if haddr_to_bin(dst) == mac.BROADCAST or mac.is_multicast(haddr_to_bin(dst)):
if eth.ethertype==ether.ETH_TYPE_ARP:
pkt_arp=pkt.get_protocol(arp.arp)
print("ARP CAME BY BROADCAST")
if self.paraIpInterfaz(pkt_arp.dst_ip)!=None:
print("IT'S FOR A SVI, WE SHOULD ANSWER THAT")
self.handleArpPacket(pkt_arp,in_port,datapath)
else:
print("NORMAL BROADCAST")
#We just have to fordward the packet thourgh the ports
#in the same vlan as the in_port
self.addForwardVlanFlow(datapath,ofproto,ofp_parser,dst,src,in_port,msg)
else:
print("NORMAL BROADCAST")
#We just have to fordward the packet thourgh the ports
#in the same vlan as the in_port
self.addForwardVlanFlow(datapath,ofproto,ofp_parser,dst,src,in_port,msg)
else:
interfazdestino=self.paraMacInterfaz(dst)
if interfazdestino!=None:
#If it goes for an svi, we have to check a few things more
pkt_arp=pkt.get_protocol(arp.arp)
print("THAT MAC IS FOR ANY SVI")
INTERFACE=interfazdestino
if eth.ethertype==0x0800:
#We should check that is ip
pkt_ipv4=pkt.get_protocol(ipv4.ipv4)
if self.paraIpInterfaz(pkt_ipv4.dst):
#If the destionation ip is the virtual interface
#we must check that is ICMP
pkt_icmp=pkt.get_protocol(icmp.icmp)
if (pkt_icmp):
#If is ICMP we should manage that
print("ESE IP ES PARA MI, RESPONDERE")
self.handleIcmpPacket(datapath, in_port, eth, pkt_ipv4, pkt_icmp)
else:
#An ip packet arrives to the interface and is not for it
#We should drop it, for that we must add a rule with higher priority
#than the go to
actions=[]
match = ofp_parser.OFPMatch(eth_dst=dst,ipv4_dst=pkt_ipv4.dst,ip_proto=pkt_ipv4.ip_proto)
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=10, match=match,
instructions=inst,idle_timeout=60, buffer_id=msg.buffer_id)
datapath.send_msg(mod)
else:
print("THIS IS IP PACKET IS NOT FOR ME, I WILL ROUTE THAT")
#We add the entry to the table 0 who makes the GoTo to the table 1
print("ALL THIS PACKET SHOULD BE PROCESSED ON THE TABLE 1 ADDING GOTO")
match = ofp_parser.OFPMatch(eth_dst=self.interfaces_virtuales.get(INTERFACE)[0])
goto = ofp_parser.OFPInstructionGotoTable(1)
mod = ofp_parser.OFPFlowMod(datapath=datapath,priority=0,match=match,table_id=0,instructions=[goto],
buffer_id=ofproto.OFP_NO_BUFFER,idle_timeout=60,command=ofproto.OFPFC_ADD)
print(mod)
datapath.send_msg(mod)
#And we process the packet for routing
self.paquete_para_enrutar(msg)
elif eth.ethertype==ether.ETH_TYPE_ARP:
print("AN ARP FOR ME, I WILL MANAGE THAT")
pkt_arp=pkt.get_protocol(arp.arp)
self.handleArpPacket(pkt_arp,in_port,datapath)
#If the packet isn't going to the interface
#it might go to the same vlan, so we have to forward it
else:
if dst not in self.mac_to_port.keys() :
print("I DON'T KNOW THAT MAC ", dst)
print("IN THE VLAN ", self.tabla_vlan.get(in_port), " WHO HAS MAC: ", dst,"?")
actions = self.forwardPortsSameVlan(ofp_parser,in_port)
req = ofp_parser.OFPPacketOut(datapath=datapath, buffer_id=ofproto.OFP_NO_BUFFER,
in_port=in_port, actions=actions, data=msg.data)
datapath.send_msg(req)
else:
puertodestino=self.mac_to_port[dst]
if self.tabla_vlan.get(self.mac_to_port.get(src)) == self.tabla_vlan.get(puertodestino) :
#We know the macs, and we know they are on the same vlan
#Direct forwarding
actions = [ofp_parser.OFPActionOutput(puertodestino)]
print("FORWARDING INSIDE THE VLAN: ", self.tabla_vlan.get(puertodestino))
else:
#If they do not belong the same vlan
#and they are trying to go directly
#we must drop the packet this is an error
print("CANNOT DIRECT FORWARD THROUGH VLANS ALL PACKETS WILL BE DROPPED")
actions=[]
match = ofp_parser.OFPMatch(eth_dst=dst,eth_src=src)
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match,
instructions=inst, idle_timeout=60, buffer_id=msg.buffer_id)
datapath.send_msg(mod)
def assignNetwork(self, req, sliceName, network_id):
status = 200
body = ""
# Check if network has been assigned to another controller
# If so, must unassign it from the other controller first
slice = self.fv_cli.getSliceName(network_id)
if slice:
if (slice == sliceName): # Should this result in an error instead?
return Response(status=status)
response = self.unassignNetwork(req, network_id)
status = response.status_code
if (status == 200) and (sliceName != self.fv_cli.defaultSlice):
# Install FV rules to route packets to controller
for (dpid, port) in self.nw.list_ports(network_id):
for mac in self.mac2port.mac_list(dpid, port):
if not is_multicast(mac):
# Install rule for MAC for all EXTERNAL ports throughout network
for (dpid2, port2) in self.nw.list_ports(NW_ID_EXTERNAL):
if (dpid2 == dpid):
continue
body = self.fv_cli.addFlowSpace(sliceName, dpid2, port2, haddr_to_str(mac))
if (body.find("success") == -1):
status = 500
break
self.fv_cli.addFlowSpaceID(dpid2, port2, mac, int(body[9:]))
if (status == 500):
break
# Now install rule for the target switch
body = self.fv_cli.addFlowSpace(sliceName, dpid, port, haddr_to_str(mac))
if (body.find("success") == -1):
# Error occured while attempting to install FV rule
status = 500
break
# Keep track of installed rules related to network
self.fv_cli.addFlowSpaceID(dpid, port, mac, int(body[9:]))
if (status == 500):
break
# Now delete rules installed in the switches
dp = self.dpset.get(dpid)
if dp is not None:
dp.send_delete_all_flows()
if (status == 500):
# Error occured in the middle of installing rules
# Previously installed rules be deleted
self.unassignNetwork(req, network_id)
if (status == 200):
self.fv_cli.slice2nw_add(sliceName, network_id)
return Response(status=status, content_type='application/json', body=body)
def packet_in_handler(self, ev):
# LOG.debug('packet in ev %s msg %s', ev, ev.msg)
msg = ev.msg
datapath = msg.datapath
dst, src, _eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
try:
port_nw_id = self.nw.get_network(datapath.id, msg.in_port)
except PortUnknown:
port_nw_id = NW_ID_UNKNOWN
if port_nw_id != NW_ID_UNKNOWN:
# Here it is assumed that the
# (port <-> network id)/(mac <-> network id) relationship
# is stable once the port is created. The port will be destroyed
# before assigning new network id to the given port.
# This is correct nova-network/nova-compute.
try:
# allow external -> known nw id change
self.mac2net.add_mac(src, port_nw_id, NW_ID_EXTERNAL)
except MacAddressDuplicated:
LOG.warn('mac address %s is already in use.'
' So (dpid %s, port %s) can not use it',
haddr_to_str(src), datapath.id, msg.in_port)
#
# should we install drop action pro-actively for future?
#
self._drop_packet(msg)
return
old_port = self.mac2port.port_add(datapath.id, msg.in_port, src)
if old_port is not None and old_port != msg.in_port:
# We really overwrite already learned mac address.
# So discard already installed stale flow entry which conflicts
# new port.
rule = nx_match.ClsRule()
rule.set_dl_dst(src)
datapath.send_flow_mod(rule=rule, cookie=0,
command=datapath.ofproto.OFPFC_DELETE, idle_timeout=0,
hard_timeout=0, priority=datapath.ofproto.OFP_DEFAULT_PRIORITY,
out_port=old_port)
# to make sure the old flow entries are purged.
datapath.send_barrier()
src_nw_id = self.mac2net.get_network(src, NW_ID_UNKNOWN)
dst_nw_id = self.mac2net.get_network(dst, NW_ID_UNKNOWN)
# If (input port belongs to a delegated network):
# Add FlowSpace for (dpid, port, src_mac)
# Drop current packet
# Else if ((port is an external) AND (src_mac belongs to a delegated network)):
# Add FlowSpace for (dpid, port, src_mac)
# Drop current packet
port_sliceName = self.fv_cli.getSliceName(port_nw_id)
src_sliceName = self.fv_cli.getSliceName(src_nw_id)
if port_sliceName or \
((port_nw_id == NW_ID_EXTERNAL) and src_sliceName):
sliceName = port_sliceName or src_sliceName
# Add FV rules if target the slice is not the default slice and if
# there currently exists no rules matching (dpid, port, mac).
# The second condition avoids installing duplicate rules if subsequent
# packets are queued in Ryu before rule installation triggered
# from first packet is completed
if (sliceName != self.fv_cli.defaultSlice) and \
(len(self.fv_cli.getFlowSpaceIDs(datapath.id, msg.in_port, src)) == 0):
# ORDER OF INSTALLING RULES IS IMPORTANT! Install rules for other switches
# before installing rules for source switch. This avoids subsequent
# packets from reaching non-source switches before rules can be properly
# installed on them, which will trigger duplicate rules to be isntalled.
# Need to install mac for all EXTERNAL ports throughout network
for (dpid, port) in self.nw.list_ports(NW_ID_EXTERNAL):
if (dpid == datapath.id):
continue
ret = self.fv_cli.addFlowSpace(sliceName, dpid, port, haddr_to_str(src))
if (ret.find("success") == -1):
# Error, how to handle?
pass
else:
self.fv_cli.addFlowSpaceID(dpid, port, src, int(ret[9:]))
# Now install rule on source switch
ret = self.fv_cli.addFlowSpace(sliceName, datapath.id, msg.in_port, haddr_to_str(src))
if (ret.find("success") == -1):
# Error, how to handle?
pass
else:
self.fv_cli.addFlowSpaceID(datapath.id, msg.in_port, src, int(ret[9:]))
self._drop_packet(msg)
return
# we handle multicast packet as same as broadcast
broadcast = (dst == mac.BROADCAST) or mac.is_multicast(dst)
out_port = self.mac2port.port_get(datapath.id, dst)
#
# there are several combinations:
# in_port: known nw_id, external, unknown nw,
# src mac: known nw_id, external, unknown nw,
# dst mac: known nw_id, external, unknown nw, and broadcast/multicast
# where known nw_id: is quantum network id
# external: means that these ports are connected to outside
# unknown nw: means that we don't know this port is bounded to
# specific nw_id or external
# broadcast: the destination mac address is broadcast address
# (or multicast address)
#
# Can the following logic be refined/shortened?
#
# When NW_ID_UNKNOWN is found, registering ports might be delayed.
# So just drop only this packet and not install flow entry.
# It is expected that when next packet arrives, the port is registers
# with some network id
if port_nw_id != NW_ID_EXTERNAL and port_nw_id != NW_ID_UNKNOWN:
if broadcast:
# flood to all ports of external or src_nw_id
self._flood_to_nw_id(msg, src, dst, src_nw_id)
elif src_nw_id == NW_ID_EXTERNAL:
self._modflow_and_drop_packet(msg, src, dst)
return
elif src_nw_id == NW_ID_UNKNOWN:
self._drop_packet(msg)
return
else:
# src_nw_id != NW_ID_EXTERNAL and src_nw_id != NW_ID_UNKNOWN:
#
# try learned mac check if the port is net_id
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst,
src_nw_id, out_port)
elif port_nw_id == NW_ID_EXTERNAL:
if src_nw_id != NW_ID_EXTERNAL and src_nw_id != NW_ID_UNKNOWN:
if broadcast:
# flood to all ports of external or src_nw_id
self._flood_to_nw_id(msg, src, dst, src_nw_id)
elif (dst_nw_id != NW_ID_EXTERNAL and
dst_nw_id != NW_ID_UNKNOWN):
if src_nw_id == dst_nw_id:
# try learned mac
# check if the port is external or same net_id
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst,
src_nw_id,
out_port)
else:
# should not occur?
LOG.debug("should this case happen?")
self._drop_packet(msg)
elif dst_nw_id == NW_ID_EXTERNAL:
# try learned mac
# or
# flood to all ports of external or src_nw_id
self._learned_mac_or_flood_to_nw_id(msg, src, dst,
src_nw_id, out_port)
else:
assert dst_nw_id == NW_ID_UNKNOWN
LOG.debug("Unknown dst_nw_id")
self._drop_packet(msg)
elif src_nw_id == NW_ID_EXTERNAL:
self._modflow_and_drop_packet(msg, src, dst)
else:
# should not occur?
assert src_nw_id == NW_ID_UNKNOWN
self._drop_packet(msg)
else:
# drop packets
assert port_nw_id == NW_ID_UNKNOWN
self._drop_packet(msg)
def packet_in_handler(self, ev):
def drop():
LOG.error("\tImplement drop function")
def flood():
LOG.warn("\tFlooding packet")
for (iDpid, switch) in self.G.nodes(data='switch'):
#Initialize ports
ports = []
#Add local port if that is not the originating port
#if (iDpid,ofp.OFPP_LOCAL) != (dpid, in_port):
# ports += [ofp.OFPP_LOCAL]
#Exclude the inter-switch and possible other incoming ports from flooding
ports += [p.port_no for p in switch.ports if (iDpid,p.port_no) != (dpid, in_port) and p.port_no not in [self.G.get_edge_data(iDpid, jDpid)['port'] for jDpid in self.G.neighbors(iDpid)]]
actions = [parser.OFPActionOutput(port, 0) for port in ports]
if iDpid == dpid and buffer_id != None:
LOG.warn("\t\tFlooding Originating Switch %d using Buffer ID"%(iDpid))
req = parser.OFPPacketOut(dp, buffer_id = buffer_id, in_port=in_port, actions=actions)
switch.dp.send_msg(req)
elif len(actions) > 0:
LOG.warn("\t\tFlooding Switch %d"%(iDpid))
req = parser.OFPPacketOut(dp, buffer_id = ofp.OFP_NO_BUFFER, in_port=ofp.OFPP_CONTROLLER, actions=actions, data=data)
switch.dp.send_msg(req)
def output(tDpid, port):
LOG.warn("\tOutputting packet")
action = parser.OFPActionOutput(port, 0)
if buffer_id != None:
#Drop the packet from the buffer on the incoming switch to prevent buffer overflows.
if tDpid != dpid:
LOG.warn("\tDropping buffer_id on incoming switch %d"%(dpid))
actions = []
#Or forward if that is also the destination switch.
else:
LOG.warn("\tOutputting via buffer_id on switch %d"%(tDpid))
actions = [ action ]
req = parser.OFPPacketOut(dp, buffer_id = buffer_id, in_port=in_port, actions=actions)
dp.send_msg(req)
#Forward packet through data-field.
if buffer_id == None or tDpid != dpid:
LOG.warn("\tOutputting on outgoing switch %d"%(tDpid))
switch = self.G.node[tDpid]['switch']
actions = [ action ]
req = parser.OFPPacketOut(dp, buffer_id = ofp.OFP_NO_BUFFER, in_port=ofp.OFPP_CONTROLLER, actions=actions, data=data)
switch.dp.send_msg(req)
msg = ev.msg
dp = msg.datapath
dpid = msg.datapath.id
in_port = msg.match['in_port']
buffer_id = msg.buffer_id
ofp = msg.datapath.ofproto
parser = msg.datapath.ofproto_parser
if msg.reason == ofp.OFPR_NO_MATCH:
reason = 'NO MATCH'
elif msg.reason == ofp.OFPR_ACTION:
reason = 'ACTION'
elif msg.reason == ofp.OFPR_INVALID_TTL:
reason = 'INVALID TTL'
else:
reason = 'unknown'
data = msg.data
pkt = packet.Packet(data)
eth = pkt.get_protocol(ethernet.ethernet)
#LOG.debug("OpenFlowBackupRules: New incoming packet from %s at switch %d, port %d, for reason %s"%(eth.src,dpid,in_port,reason))
if self.CONF.observe_links and eth.ethertype == ether_types.ETH_TYPE_LLDP:
# ignore LLDP related messages IF topology module has been enabled.
#LOG.debug("\tIgnored LLDP packet due to enabled topology module")
return
LOG.warn("OpenFlowBackupRules: Accepted incoming packet from %s at switch %d, port %d, for reason %s"%(eth.src,dpid,in_port,reason))
LOG.debug("\t%s"%(msg))
LOG.debug("\t%s"%(pkt))
SwitchPort = namedtuple('SwitchPort', 'dpid port')
#if in_port not in [port for _,port in self.G.neighbors(dpid, data="port")]:
if in_port not in [self.G.get_edge_data(dpid, jDpid)['port'] for jDpid in self.G.neighbors(dpid)]:
# only relearn locations if they arrived from non-interswitch links
self.mac_learning[eth.src] = SwitchPort(dpid, in_port) #relearn the location of the mac-address
LOG.warn("\tLearned or updated MAC address")
else:
LOG.warn("\tIncoming packet from switch-to-switch link, this should NOT occur.")
#DROP it
if mac.is_multicast( mac.haddr_to_bin(eth.dst) ):
#Maybe we should do something with preconfigured broadcast trees, but that is a different problem for now.
flood()
LOG.warn("\tFlooded multicast packet")
elif eth.dst not in self.mac_learning:
flood()
LOG.warn("\tFlooded unicast packet, unknown MAC address location")
#ARP messages are too infrequent and volatile of nature to create flows for, output immediately
elif eth.ethertype == ether_types.ETH_TYPE_ARP:
output(self.mac_learning[eth.dst].dpid, self.mac_learning[eth.dst].port)
LOG.warn("\tProcessed packet, send to recipient at %s"%(self.mac_learning[eth.dst],))
#Create flow and output or forward.
else:
self._install_path(dpid, in_port, pkt)
#Output the first packet to its destination
output(self.mac_learning[eth.dst].dpid, self.mac_learning[eth.dst].port)
LOG.warn("\tProcessed packet, sent to recipient at %s"%(self.mac_learning[eth.dst],))
def packet_in_handler(self, ev):
msg = ev.msg # Objeto que representa la estuctura de datos PacketIn.
datapath = msg.datapath # Identificador del datapath correspondiente al switch.
ofproto = datapath.ofproto # Protocolo utilizado que se fija en una etapa
# de negociacion entre controlador y switch
ofp_parser=datapath.ofproto_parser # Parser con la version OF
# correspondiente
in_port = msg.match['in_port'] # Puerto de entrada.
destination_ip = msg.match['arp_tpa']
origen_ip = msg.match['arp_spa']
# Ahora analizamos el paquete utilizando las clases de la libreria packet.
pkt = packet.Packet(msg.data)
eth = pkt.get_protocol(ethernet.ethernet)
# Extraemos la MAC de destino
dst = eth.dst
#Extramos la MAC de origen
src = eth.src
if src not in self.mac_to_port.keys():
self.mac_to_port[src]=in_port
if haddr_to_bin(dst) == mac.BROADCAST or mac.is_multicast(haddr_to_bin(dst)):
# Creamos el conjunto de acciones: FLOOD
actions = [ofp_parser.OFPActionOutput(ofproto.OFPP_FLOOD)]
# Ahora creamos el match
# fijando los valores de los campos
# que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
elif dst not in self.mac_to_port.keys():
actions = [ofp_parser.OFPPacketOut(outproto.OFPP_FLOOD)]
req = ofp_parser.OFPPacketOut(datapath, buffer_id, in_port, actions, data=msg.data)
datapath.send_msg(req)
else:
actions = [ofp_parser.OFPActionOutput(self.mac_to_port[dst])]
# Ahora creamos el match
# fijando los valores de los campos
# que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
def packet_in_handler(self, ev):
msg = ev.msg # Objeto que representa la estuctura de datos PacketIn.
datapath = msg.datapath # Identificador del datapath correspondiente al switch.
ofproto = datapath.ofproto # Protocolo utilizado que se fija en una etapa
# de negociacion entre controlador y switch
ofp_parser=datapath.ofproto_parser # Parser con la version OF
# correspondiente
in_port = msg.match['in_port'] # Puerto de entrada.
pkt = packet.Packet(msg.data)
eth = pkt.get_protocol(ethernet.ethernet)
# Extraemos la MAC de destino
dst = eth.dst
#Extramos la MAC de origen
src = eth.src
if src not in self.mac_to_port.keys():
self.mac_to_port[src]=in_port
if haddr_to_bin(dst) == mac.BROADCAST or mac.is_multicast(haddr_to_bin(dst)):
print("BROADCAST")
# Creamos el conjunto de acciones: FLOOD
actions = []
for j in self.tabla_vlan.keys():
print("Puerto? ", j)
if self.tabla_vlan.get(j)==self.tabla_vlan.get(in_port) and j !=in_port :
actions.append(ofp_parser.OFPActionOutput(j))
print("Vlan ", self.tabla_vlan.get(j),"puerto de entrada", in_port, "otros puertos ", j)
match = ofp_parser.OFPMatch(eth_dst=dst,eth_src=src)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
elif dst not in self.mac_to_port.keys():
#actions = [ofp_parser.OFPPacketOut(ofproto.OFPP_FLOOD)]
actions = []
print("NO CONOZCO LA MAC ", dst)
for i in self.tabla_vlan.keys():
if self.tabla_vlan.get(i)==self.tabla_vlan.get(in_port) and i !=in_port :
actions.append(ofp_parser.OFPActionOutput(i))
print i
print("QUIEN DE LA VLAN ", self.tabla_vlan.get(in_port), " TIENE LA MAC ", dst,"?")
req = ofp_parser.OFPPacketOut(datapath=datapath, buffer_id=msg.buffer_id, in_port=in_port, actions=actions, data=msg.data)
datapath.send_msg(req)
elif self.tabla_vlan.get(self.mac_to_port.get(src)) == self.tabla_vlan.get(self.mac_to_port.get(dst)) :
actions = [ofp_parser.OFPActionOutput(self.mac_to_port[dst])]
print("Pasando paquetes de la vlan ", self.tabla_vlan.get(self.mac_to_port.get(src)))
# fijando los valores de los campos que queremos casar.
match = ofp_parser.OFPMatch(eth_dst=dst,eth_src=src)
# Creamos el conjunto de instrucciones.
inst = [ofp_parser.OFPInstructionActions(ofproto.OFPIT_APPLY_ACTIONS, actions)]
# Creamos el mensaje OpenFlow
mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, buffer_id=msg.buffer_id)
#mod = ofp_parser.OFPFlowMod(datapath=datapath, priority=0, match=match, instructions=inst, idle_timeout=30, buffer_id=msg.buffer_id)
# Enviamos el mensaje.
datapath.send_msg(mod)
else: #Si no son de la misma vlan, tira el paquete
for INTERFACE in interfaces_virtuales.keys():
if eth.ethertype==ether.ETH_TYPE_ARP and interfaces_virtuales.get(INTERFACE)[2]==pkt_arp.ipv4_dst:
pkt_arp=pkt.get_protocol(arp.arp)
self.ARPPacket(pkt_arp,in_port,datapath)
elif(interfaces_virtuales.get(INTERFACE)[0]==dst):
match = ofp_parser.OFPMatch(eth_dst=interfaces_virtuales.get(INTERFACE)[0])
goto = ofp_parser.OFPInstructionGotoTable(1)
mod = ofp_parser.OFPFlowMod(datapath=datapath,priority=0, match=match,instructions=[goto],buffer_id)
datapath.send_msg(mod)
self.paquete_para_enrutar(ev)
else:
print("Paquete fuera de red")
def packet_in_handler(self, ev):
# LOG.debug('packet in ev %s msg %s', ev, ev.msg)
msg = ev.msg
datapath = msg.datapath
ofproto = datapath.ofproto
dst, src, _eth_type = struct.unpack_from('!6s6sH', buffer(msg.data), 0)
LOG.info("packet in from port %s of dpid %s", msg.in_port, hex(datapath.id))
LOG.info("src mac %s, dst mac %s", haddr_to_str(src), haddr_to_str(dst))
try:
port_nw_id = self.nw.get_network(datapath.id, msg.in_port)
except PortUnknown:
port_nw_id = NW_ID_UNKNOWN
if port_nw_id != NW_ID_UNKNOWN:
# Here it is assumed that the
# (port <-> network id)/(mac <-> network id) relationship
# is stable once the port is created. The port will be destroyed
# before assigning new network id to the given port.
# This is correct nova-network/nova-compute.
try:
# allow external -> known nw id change
self.mac2net.add_mac(src, port_nw_id, NW_ID_EXTERNAL)
self.api_db.addMAC(port_nw_id, haddr_to_str(src))
except MacAddressDuplicated:
LOG.warn('mac address %s is already in use.'
' So (dpid %s, port %s) can not use it',
haddr_to_str(src), datapath.id, msg.in_port)
#
# should we install drop action pro-actively for future?
#
self._drop_packet(msg)
return
old_port = self.mac2port.port_add(datapath.id, msg.in_port, src)
if old_port is not None and old_port != msg.in_port:
# We really overwrite already learned mac address.
# So discard already installed stale flow entry which conflicts
# new port.
rule = nx_match.ClsRule()
rule.set_dl_dst(src)
datapath.send_flow_mod(rule=rule,
cookie=0,
command=ofproto.OFPFC_DELETE,
idle_timeout=0,
hard_timeout=0,
priority=ofproto.OFP_DEFAULT_PRIORITY,
out_port=old_port)
# to make sure the old flow entries are purged.
datapath.send_barrier()
src_nw_id = self.mac2net.get_network(src, NW_ID_UNKNOWN)
dst_nw_id = self.mac2net.get_network(dst, NW_ID_UNKNOWN)
# If (input port belongs to a delegated network):
# Add FlowSpace for (dpid, port, src_mac)
# Drop current packet
# Else if ((port is an external) AND (src_mac belongs to a delegated network)):
# Add FlowSpace for (dpid, port, src_mac)
# Drop current packet
port_sliceName = self.fv_cli.getSliceName(port_nw_id)
src_sliceName = self.fv_cli.getSliceName(src_nw_id)
if port_sliceName or \
((port_nw_id == NW_ID_EXTERNAL) and src_sliceName):
sliceName = port_sliceName or src_sliceName
# Add FV rules if the target slice is not the default slice and if
# there currently exists no rules matching (dpid, port, mac).
# The second condition avoids installing duplicate rules if subsequent
# packets are queued in Ryu before rule installation triggered
# from first packet is completed
if (sliceName != self.fv_cli.defaultSlice) and \
(len(self.fv_cli.getFlowSpaceIDs(datapath.id, msg.in_port, src)) == 0):
# ORDER OF INSTALLING RULES IS IMPORTANT! Install rules for other switches
# before installing rules for source switch. This avoids subsequent
# packets from reaching non-source switches before rules can be properly
# installed on them, which will trigger duplicate rules to be isntalled.
# Need to install mac for all EXTERNAL ports throughout network
for (dpid, port) in self.nw.list_ports(NW_ID_EXTERNAL):
if (dpid == datapath.id):
continue
ret = self.fv_cli.addFlowSpace(sliceName, dpid, port, haddr_to_str(src))
if (ret.find("success") == -1):
# Error, how to handle?
LOG.debug("Error while installing FlowSpace for slice %s: (%s, %s, %s)",\
sliceName, dpid, str(port), haddr_to_str(src))
else:
self.fv_cli.addFlowSpaceID(dpid, port, src, int(ret[9:]))
self.api_db.addFlowSpaceID(hex(dpid), port, haddr_to_str(src), int(ret[9:]))
# Now install rule on source switch
ret = self.fv_cli.addFlowSpace(sliceName, datapath.id, msg.in_port, haddr_to_str(src))
if (ret.find("success") == -1):
# Error, how to handle?
LOG.debug("Error while installing FlowSpace for slice %s: (%s, %s, %s)",\
sliceName, dpid, str(port), haddr_to_str(src))
else:
self.fv_cli.addFlowSpaceID(datapath.id, msg.in_port, src, int(ret[9:]))
self.api_db.addFlowSpaceID(hex(datapath.id), msg.in_port, haddr_to_str(src), int(ret[9:]))
self._drop_packet(msg)
return
# we handle multicast packet as same as broadcast
broadcast = (dst == mac.BROADCAST) or mac.is_multicast(dst)
out_port = self.mac2port.port_get(datapath.id, dst)
if src_nw_id == NW_ID_PXE or src_nw_id == NW_ID_PXE_CTRL:
self.pktHandling_PXE(msg, datapath, ofproto, dst, src, broadcast,
port_nw_id, src_nw_id, dst_nw_id, out_port)
elif src_nw_id == NW_ID_MGMT or src_nw_id == NW_ID_MGMT_CTRL:
self.pktHandling_MGMT(msg, datapath, ofproto, dst, src, broadcast,
port_nw_id, src_nw_id, dst_nw_id, out_port)
else:
self.pktHandling_BaseCase(msg, datapath, ofproto, dst, src, broadcast,
port_nw_id, src_nw_id, dst_nw_id, out_port)
LOG.info("\n")
