def generate_bddp_packet(self, switch_name, port):
if self.topo_client.key_bddp is None:
print("ERROR: cant encrypt lldp because key is not set")
return
ether = Ether(src=self.mac_address,
dst='ff:ff:ff:ff:ff:ff',
type=0x8999)
lldp_chassis_id = lldp.LLDPDUChassisID(id=str.encode(switch_name))
lldp_port_id = lldp.LLDPDUPortID(id=struct.pack(">H", port))
lldp_timte_to_live = lldp.LLDPDUTimeToLive(ttl=6)
lldp_end_of_lldp = lldp.LLDPDUEndOfLLDPDU()
lldp_p = ether / lldp_chassis_id / lldp_port_id / lldp_timte_to_live / lldp_end_of_lldp
nonce = os.urandom(12)
aesgcm = AESGCM(self.topo_client.key_bddp)
seq = struct.pack(">i", self.bddp_seq)
ciphertext = aesgcm.encrypt(nonce, str(lldp_p)[14:], seq)
self.bddp_seq = self.bddp_seq + 1
#cpu header: q hat Laenge 8, w hat Laenge 2
reason = struct.pack(">H", 60001)
out_port = struct.pack(">H", port)
zeros = struct.pack(">q", 0)
timestamp1 = struct.pack('<H', 0)
timestamp2 = struct.pack('<H', 0)
timestamp3 = struct.pack('<H', 0)
cpu_header = zeros + reason + out_port + timestamp1 + timestamp2 + timestamp3
print('sending BDDP packet on port ' + str(port))
return (cpu_header + str(ether) + nonce + seq + ciphertext)
def generate_lldp_packet(self, port):
pkt = Ether(src='00:00:00:00:00:00', dst="ff:ff:ff:ff:ff:ff")
lldp_chassis_id = lldp.LLDPDUChassisID(id=str.encode(self.sw.name))
lldp_port_id = lldp.LLDPDUPortID(id=struct.pack(">H", port))
lldp_time_to_live = lldp.LLDPDUTimeToLive(ttl=1)
lldp_end_of_lldp = lldp.LLDPDUEndOfLLDPDU()
pkt = pkt / lldp_chassis_id / lldp_port_id / lldp_time_to_live / lldp_end_of_lldp
zeros = struct.pack(">q", 0)
ingress_port = struct.pack(">H", port)
type = struct.pack(">H", 5)
header = zeros + ingress_port + type
print "sending LLDP packet on port" + str(port)
return (header + str(pkt))
def do_send_lldp_packet(self, line):
[s0] = self.controller.switches
port = int(line)
pkt = Ether(src='00:00:00:00:00:00', dst='ff:ff:ff:ff:ff:ff')
lldp_chassis_id = lldp.LLDPDUChassisID(id=str.encode(s0.name))
lldp_port_id = lldp.LLDPDUPortID(id=struct.pack(">H", port))
lldp_timte_to_live = lldp.LLDPDUTimeToLive(ttl=6)
lldp_end_of_lldp = lldp.LLDPDUEndOfLLDPDU()
pkt = pkt / lldp_chassis_id / lldp_port_id / lldp_timte_to_live / lldp_end_of_lldp
#cpu header: q hat Laenge 8, w hat Laenge 2
reason = struct.pack(">H", 4)
out_port = struct.pack(">H", port)
zeros = struct.pack(">q", 0)
cpu_header = zeros + reason + out_port
self.controller.send_packet_out(s0, cpu_header + str(pkt))
def generate_lldp_packet(self, switch_name, port):
pkt = Ether(src=self.mac_address, dst='ff:ff:ff:ff:ff:ff')
lldp_chassis_id = lldp.LLDPDUChassisID(id=str.encode(switch_name))
lldp_port_id = lldp.LLDPDUPortID(id=struct.pack(">H", port))
lldp_timte_to_live = lldp.LLDPDUTimeToLive(ttl=6)
lldp_end_of_lldp = lldp.LLDPDUEndOfLLDPDU()
pkt = pkt / lldp_chassis_id / lldp_port_id / lldp_timte_to_live / lldp_end_of_lldp
#cpu header: q hat Laenge 8, w hat Laenge 2
reason = struct.pack(">H", 60001)
out_port = struct.pack(">H", port)
zeros = struct.pack(">q", 0)
timestamp1 = struct.pack('<H', 0)
timestamp2 = struct.pack('<H', 0)
timestamp3 = struct.pack('<H', 0)
cpu_header = zeros + reason + out_port + timestamp1 + timestamp2 + timestamp3
print('sending LLDP packet on port ' + str(port))
return (cpu_header + str(pkt))
def _encode(self, entry):
entries = (lldp.LLDPDUChassisID(
subtype=lldp.LLDPDUChassisID.SUBTYPE_MAC_ADDRESS,
id=entry.chassis_id),
lldp.LLDPDUPortID(
subtype=lldp.LLDPDUPortID.SUBTYPE_LOCALLY_ASSIGNED,
id=entry.port_number),
lldp.LLDPDUTimeToLive(ttl=entry.time_to_live))
if entry.port_description:
entries = entries + (lldp.LLDPDUPortDescription(
description=entry.port_description), )
if entry.system_name:
entries = entries + (lldp.LLDPDUSystemName(
system_name=entry.system_name), )
if entry.system_description:
entries = entries + (lldp.LLDPDUSystemDescription(
description=entry.system_description), )
entries = entries + (lldp.LLDPDUEndOfLLDPDU(), )
payload = functools.reduce(operator.truediv, entries)
return Ether(src=entry.mac_address, dst=self.lldp_bcast_mac) / payload