def test_serialize_with_auth_simple(self):
pkt = packet.Packet()
eth_pkt = ethernet.ethernet('08:00:27:d1:95:7c', '08:00:27:ed:54:41')
pkt.add_protocol(eth_pkt)
ip_pkt = ipv4.ipv4(src='192.168.57.2', dst='192.168.57.1', tos=192,
identification=3216, proto=inet.IPPROTO_UDP)
pkt.add_protocol(ip_pkt)
udp_pkt = udp.udp(49152, 3784)
pkt.add_protocol(udp_pkt)
auth_cls = bfd.SimplePassword(auth_key_id=2,
password=self.auth_keys[2])
bfd_pkt = bfd.bfd(ver=1, diag=bfd.BFD_DIAG_NO_DIAG,
flags=bfd.BFD_FLAG_AUTH_PRESENT,
state=bfd.BFD_STATE_DOWN, detect_mult=3, my_discr=1,
your_discr=0, desired_min_tx_interval=1000000,
required_min_rx_interval=1000000,
required_min_echo_rx_interval=0,
auth_cls=auth_cls)
pkt.add_protocol(bfd_pkt)
eq_(len(pkt.protocols), 4)
pkt.serialize()
eq_(pkt.data, self.data_auth_simple)
def test_json_with_auth_simple(self):
auth_cls = bfd.SimplePassword(auth_key_id=2,
password=self.auth_keys[2])
bfd1 = bfd.bfd(ver=1, diag=bfd.BFD_DIAG_NO_DIAG,
flags=bfd.BFD_FLAG_AUTH_PRESENT,
state=bfd.BFD_STATE_DOWN, detect_mult=3, my_discr=1,
your_discr=0, desired_min_tx_interval=1000000,
required_min_rx_interval=1000000,
required_min_echo_rx_interval=0,
auth_cls=auth_cls)
jsondict = bfd1.to_jsondict()
bfd2 = bfd.bfd.from_jsondict(jsondict['bfd'])
eq_(str(bfd1), str(bfd2))
def _send(self):
"""
BFD packet sender.
"""
# If the switch was not connected to controller, exit.
if self.datapath is None:
return
# BFD Flags Setup
flags = 0
if self._pending_final:
flags |= bfd.BFD_FLAG_FINAL
self._pending_final = False
self._is_polling = False
if self._is_polling:
flags |= bfd.BFD_FLAG_POLL
# Authentication Section
auth_cls = None
if self._auth_type:
auth_key_id = list(self._auth_keys.keys())[random.randint(
0,
len(list(self._auth_keys.keys())) - 1)]
auth_key = self._auth_keys[auth_key_id]
if self._auth_type == bfd.BFD_AUTH_SIMPLE_PASS:
auth_cls = bfd.SimplePassword(auth_key_id=auth_key_id,
password=auth_key)
if self._auth_type in [
bfd.BFD_AUTH_KEYED_MD5, bfd.BFD_AUTH_METICULOUS_KEYED_MD5,
bfd.BFD_AUTH_KEYED_SHA1, bfd.BFD_AUTH_METICULOUS_KEYED_SHA1
]:
if self._auth_type in [
bfd.BFD_AUTH_KEYED_MD5, bfd.BFD_AUTH_KEYED_SHA1
]:
if random.randint(0, 1):
self._xmit_auth_seq = \
(self._xmit_auth_seq + 1) & UINT32_MAX
else:
self._xmit_auth_seq = \
(self._xmit_auth_seq + 1) & UINT32_MAX
auth_cls = bfd.bfd._auth_parsers[self._auth_type](
auth_key_id=auth_key_id,
seq=self._xmit_auth_seq,
auth_key=auth_key)
if auth_cls is not None:
flags |= bfd.BFD_FLAG_AUTH_PRESENT
if self._demand_mode and \
self._session_state == bfd.BFD_STATE_UP and \
self._remote_session_state == bfd.BFD_STATE_UP:
flags |= bfd.BFD_FLAG_DEMAND
ver = 1
diag = self._local_diag
state = self._session_state
detect_mult = self._detect_mult
my_discr = self._local_discr
your_discr = self._remote_discr
desired_min_tx_interval = self._desired_min_tx_interval
required_min_rx_interval = self._required_min_rx_interval
required_min_echo_rx_interval = self._cfg_required_min_echo_rx_interval
# Prepare for Ethernet/IP/UDP header fields
src_mac = self.src_mac
dst_mac = self.dst_mac
src_ip = self.src_ip
dst_ip = self.dst_ip
self.ipv4_id = (self.ipv4_id + 1) & UINT16_MAX
ipv4_id = self.ipv4_id
src_port = self.src_port
dst_port = self.dst_port
# Construct BFD Control packet
data = BFDPacket.bfd_packet(
src_mac=src_mac,
dst_mac=dst_mac,
src_ip=src_ip,
dst_ip=dst_ip,
ipv4_id=ipv4_id,
src_port=src_port,
dst_port=dst_port,
diag=diag,
state=state,
flags=flags,
detect_mult=detect_mult,
my_discr=my_discr,
your_discr=your_discr,
desired_min_tx_interval=desired_min_tx_interval,
required_min_rx_interval=required_min_rx_interval,
required_min_echo_rx_interval=required_min_echo_rx_interval,
auth_cls=auth_cls)
# Prepare for a datapath
datapath = self.datapath
ofproto = datapath.ofproto
parser = datapath.ofproto_parser
actions = [parser.OFPActionOutput(self.ofport)]
out = parser.OFPPacketOut(datapath=datapath,
buffer_id=ofproto.OFP_NO_BUFFER,
in_port=ofproto.OFPP_CONTROLLER,
actions=actions,
data=data)
datapath.send_msg(out)
LOG.debug("[BFD][%s][SEND] BFD Control sent.", hex(self._local_discr))
