def create_discovery_packet(self, dpid, portNum, portAddr):
""" Create LLDP packet """
discovery_packet = lldp()
cid = chassis_id()
# Maybe this should be a MAC. But a MAC of what? Local port, maybe?
cid.fill(cid.SUB_LOCAL, bytes('dpid:' + hex(long(dpid))[2:-1]))
discovery_packet.add_tlv(cid)
pid = port_id()
pid.fill(pid.SUB_PORT, str(portNum))
discovery_packet.add_tlv(pid)
ttlv = ttl()
ttlv.fill(LLDP_TTL)
discovery_packet.add_tlv(ttlv)
sysdesc = system_description()
sysdesc.fill(bytes('dpid:' + hex(long(dpid))[2:-1]))
discovery_packet.add_tlv(sysdesc)
discovery_packet.add_tlv(end_tlv())
eth = ethernet()
eth.src = portAddr
eth.dst = NDP_MULTICAST
eth.set_payload(discovery_packet)
eth.type = ethernet.LLDP_TYPE
po = of.ofp_packet_out(action=of.ofp_action_output(port=portNum),
data=eth.pack())
return po.pack()
def create_discovery_packet(self, dpid, portNum, portAddr):
""" Create LLDP packet """
discovery_packet = lldp()
cid = chassis_id()
# Maybe this should be a MAC. But a MAC of what? Local port, maybe?
cid.fill(cid.SUB_LOCAL, bytes("dpid:" + hex(long(dpid))[2:-1]))
discovery_packet.add_tlv(cid)
pid = port_id()
pid.fill(pid.SUB_PORT, str(portNum))
discovery_packet.add_tlv(pid)
ttlv = ttl()
ttlv.fill(LLDP_TTL)
discovery_packet.add_tlv(ttlv)
sysdesc = system_description()
sysdesc.fill(bytes("dpid:" + hex(long(dpid))[2:-1]))
discovery_packet.add_tlv(sysdesc)
discovery_packet.add_tlv(end_tlv())
eth = ethernet()
eth.src = portAddr
eth.dst = NDP_MULTICAST
eth.set_payload(discovery_packet)
eth.type = ethernet.LLDP_TYPE
po = of.ofp_packet_out(action=of.ofp_action_output(port=portNum), data=eth.pack())
return po.pack()
def send_lldp_packet(self, event):
"""
Sends LLDP packet to all neighbour switches by iterating over
the ports of the switch and sending the packet to each one
apart from the controller. This function is called each second
from each switch with the help of the Timer object set
for each switch.
Note: This function is an exact copy to the code given
in Appendix B of the Exercise description.
"""
dst = Discovery.LLDP_DST_ADDR # == '\x01\x80\xc2\x00\x00\x0e'
for p in event.ofp.ports:
if p.port_no < of.OFPP_MAX:
# Build LLDP packet
src = str(p.hw_addr)
port = p.port_no
lldp_p = lldp() # create LLDP payload
ch_id = chassis_id() # Add switch ID part
ch_id.subtype = 1
ch_id.id = str(event.dpid)
lldp_p.add_tlv(ch_id)
po_id = port_id() # Add port ID part
po_id.subtype = 2
po_id.id = str(port)
lldp_p.add_tlv(po_id)
tt = ttl() # Add TTL
tt.ttl = Discovery.LLDP_INTERVAL # == 1
lldp_p.add_tlv(tt)
lldp_p.add_tlv(end_tlv())
ether = ethernet() # Create an Ethernet packet
ether.type = ethernet.LLDP_TYPE # Set its type to LLDP
ether.src = src # Set src, dst
ether.dst = dst
ether.payload = lldp_p # Set payload to be the LLDP payload
# send LLDP packet
pkt = of.ofp_packet_out(action=of.ofp_action_output(port=port))
pkt.data = ether
event.connection.send(pkt)
def _send_lldp(self, event ):
""""
"""""
# log.debug('Flooding packet : dest = {} src = {} in_port = {}'.format(packet.dst, packet.src, packet_in.in_port))
# self.send_packet(packet_in.buffer_id, packet_in.data, of.OFPP_FLOOD, packet_in.in_port)
# log.debug("send lldp sw : {}".format(event.dpid))
dst = Discovery.LLDP_DST_ADDR # == '\x01\x80\xc2\x00\x00\x0e'
for p in event.ofp.ports:
if p.port_no < of.OFPP_MAX:
# Build LLDP packet
src = str(p.hw_addr)
port = p.port_no
lldp_p = lldp() # create LLDP payload
ch_id = chassis_id() # Add switch ID part
ch_id.subtype = 1
ch_id.id = str(event.dpid)
lldp_p.add_tlv(ch_id)
po_id = port_id() # Add port ID part
po_id.subtype = 2
po_id.id = str(port)
lldp_p.add_tlv(po_id)
tt = ttl() # Add TTL
tt.ttl = Discovery.LLDP_INTERVAL # == 1
lldp_p.add_tlv(tt)
lldp_p.add_tlv(end_tlv())
ether = ethernet() # Create an Ethernet packet
ether.type = ethernet.LLDP_TYPE # Set its type to LLDP
ether.src = src # Set src, dst
ether.dst = dst
ether.payload = lldp_p # Set payload to be the LLDP payload
# send LLDP packet
pkt = of.ofp_packet_out(action = of.ofp_action_output(port = port))
pkt.data = ether
event.connection.send(pkt)
def _send_LLDP_to_switch(self,event):
'''
sending lldp packet to all of a switch ports
:param event: the switch ConnectionUp Event
'''
dst = Discovery.LLDP_DST_ADDR
for p in event.ofp.ports:
if p.port_no < of.OFPP_MAX: # @UndefinedVariable
# Build LLDP packet
src = str(p.hw_addr)
port = p.port_no
lldp_p = lldp() # create LLDP payload
ch_id=chassis_id() # Add switch ID part
ch_id.fill(ch_id.SUB_LOCAL,bytes(hex(long(event.dpid))[2:-1])) # This works, the appendix example doesn't
#ch_id.subtype=chassis_id.SUB_LOCAL
#ch_id.id=event.dpid
lldp_p.add_tlv(ch_id)
po_id = port_id() # Add port ID part
po_id.subtype = 2
po_id.id = str(port)
lldp_p.add_tlv(po_id)
tt = ttl() # Add TTL
tt.ttl = 1
lldp_p.add_tlv(tt)
lldp_p.add_tlv(end_tlv())
ether = ethernet() # Create an Ethernet packet
ether.type = ethernet.LLDP_TYPE # Set its type to LLDP
ether.src = src # Set src, dst
ether.dst = dst
ether.payload = lldp_p # Set payload to be the LLDP payload
# send LLDP packet
pkt = of.ofp_packet_out(action = of.ofp_action_output(port = port))
pkt.data = ether
event.connection.send(pkt)