def execute(self):
"""Send LLDP Packets every 'POLLING_TIME' seconds to all switches."""
switches = list(self.controller.switches.values())
for switch in switches:
try:
of_version = switch.connection.protocol.version
except AttributeError:
of_version = None
if not (switch.is_connected() and of_version in [0x01, 0x04]):
continue
for interface in switch.interfaces.values():
# Avoid ports with speed == 0
if interface.port_number == 65534:
continue
lldp = LLDP()
lldp.chassis_id.sub_value = DPID(switch.dpid)
port_type = UBInt16 if of_version == 0x01 else UBInt32
lldp.port_id.sub_value = port_type(interface.port_number)
ethernet = Ethernet()
ethernet.ether_type = EtherType.LLDP
ethernet.source = interface.address
ethernet.destination = constants.LLDP_MULTICAST_MAC
ethernet.data = lldp.pack()
packet_out = self.build_lldp_packet_out(
of_version, interface.port_number, ethernet.pack())
if packet_out is not None:
name = 'kytos/of_lldp.messages.out.ofpt_packet_out'
content = {
'destination': switch.connection,
'message': packet_out
}
event_out = KytosEvent(name=name, content=content)
self.controller.buffers.msg_out.put(event_out)
log.debug("Sending a LLDP PacketOut to the switch %s",
switch.dpid)
def execute(self):
"""Implement a loop to check switches liveness."""
switches = list(self.controller.switches.values())
for switch in switches:
if not (switch.is_connected() and
switch.connection.protocol.version == 0x01):
continue
# Gerar lldp para cada uma das portas do switch
# Gerar o hash de cada um dos pacotes e armazenar
for port in switch.features.ports:
output_action = ActionOutput()
output_action.port = port.port_no
# Avoid ports with speed == 0
if port.port_no.value == 65534:
continue
ethernet = Ethernet()
ethernet.ether_type = constants.LLDP_ETHERTYPE
ethernet.source = port.hw_addr
ethernet.destination = constants.LLDP_MULTICAST_MAC
lldp = LLDP()
lldp.chassis_id.sub_value = DPID(switch.dpid)
lldp.port_id.sub_value = port.port_no
ethernet.data = lldp.pack()
packet_out = PacketOut()
packet_out.actions.append(output_action)
packet_out.data = ethernet.pack()
event_out = KytosEvent()
event_out.name = 'kytos/of_lldp.messages.out.ofpt_packet_out'
event_out.content = {'destination': switch.connection,
'message': packet_out}
self.controller.buffers.msg_out.put(event_out)
log.debug("Sending a LLDP PacketOut to the switch %s",
switch.dpid)
def execute(self):
"""Send LLDP Packets every 'POLLING_TIME' seconds to all switches."""
switches = list(self.controller.switches.values())
for switch in switches:
try:
of_version = switch.connection.protocol.version
except AttributeError:
of_version = None
if not switch.is_connected():
continue
if of_version == 0x01:
port_type = UBInt16
local_port = Port10.OFPP_LOCAL
elif of_version == 0x04:
port_type = UBInt32
local_port = Port13.OFPP_LOCAL
else:
# skip the current switch with unsupported OF version
continue
interfaces = list(switch.interfaces.values())
for interface in interfaces:
# Avoid the interface that connects to the controller.
if interface.port_number == local_port:
continue
lldp = LLDP()
lldp.chassis_id.sub_value = DPID(switch.dpid)
lldp.port_id.sub_value = port_type(interface.port_number)
ethernet = Ethernet()
ethernet.ether_type = EtherType.LLDP
ethernet.source = interface.address
ethernet.destination = constants.LLDP_MULTICAST_MAC
ethernet.data = lldp.pack()
# self.vlan_id == None will result in a packet with no VLAN.
ethernet.vlans.append(VLAN(vid=self.vlan_id))
packet_out = self._build_lldp_packet_out(
of_version, interface.port_number, ethernet.pack())
if packet_out is not None:
event_out = KytosEvent(
name='kytos/of_lldp.messages.out.ofpt_packet_out',
content={
'destination': switch.connection,
'message': packet_out
})
self.controller.buffers.msg_out.put(event_out)
log.debug("Sending a LLDP PacketOut to the switch %s",
switch.dpid)
msg = '\n'
msg += 'Switch: %s (%s)\n'
msg += ' Interfaces: %s\n'
msg += ' -- LLDP PacketOut --\n'
msg += ' Ethernet: eth_type (%s) | src (%s) | dst (%s)\n'
msg += ' LLDP: Switch (%s) | port (%s)'
log.debug(msg, switch.connection.address, switch.dpid,
switch.interfaces, ethernet.ether_type,
ethernet.source, ethernet.destination,
switch.dpid, interface.port_number)
def generate_trace_pkt(entries, color, r_id, my_domain):
""" Receives the REST/PUT to generate a PacketOut
data needs to be serialized.
Args:
entries:
color: result from Coloring Napp for a specific DPID
r_id:
my_domain:
Returns:
in_port:
pkt:
"""
trace = {}
switch = {}
eth = {}
ip = {}
tp = {}
# TODO Validate for dl_vlan. If empty, return error.
# Default values
dpid, in_port = 0, 65532
if color['color_field'] == 'dl_src':
dl_src = color['color_value']
else:
dl_src = '0e:55:05:0e:55:05'
dl_dst = "ca:fe:ca:fe:ca:fe"
dl_vlan, dl_type, dl_vlan_pcp = 100, 2048, 0
nw_src, nw_dst, nw_tos = '127.0.0.1', '127.0.0.1', 0
tp_src, tp_dst = 1, 1
try:
trace = entries['trace']
switch = trace['switch']
eth = trace['eth']
except:
pass
try:
ip = trace['ip']
except:
pass
try:
tp = trace['tp']
except:
pass
if len(switch) > 0:
dpid, in_port = prepare_switch(switch, dpid, in_port)
if len(eth) > 0:
dl_src, dl_dst, dl_vlan, dl_type, dl_vlan_pcp = prepare_ethernet(eth, dl_src, dl_dst,
dl_vlan, dl_type,
dl_vlan_pcp)
# if len(ip) > 0:
nw_src, nw_dst, nw_tos = prepare_ip(ip, nw_src, nw_dst, nw_tos)
# if len(tp) > 0:
tp_src, tp_dst = prepare_tp(tp, tp_src, tp_dst)
kethernet = Ethernet()
kethernet.ether_type = constants.VLAN
kethernet.source = dl_src
kethernet.destination = dl_dst
kvlan = VLAN(vid=int(dl_vlan), pcp=dl_vlan_pcp, ether_type=int(dl_type))
msg = TraceMsg(r_id, my_domain)
if int(dl_type) == constants.IPv4:
kip = IPv4()
kip.destination = nw_dst
kip.source = nw_src
# ip.protocol = 6
kip.data = dill.dumps(msg)
kvlan.data = kip.pack()
else:
kvlan.data = dill.dumps(msg)
kethernet.data = kvlan.pack()
pkt = kethernet.pack()
return in_port, pkt