build.main.Main.install_lldp_flow() - Code Metrics - Inspection of "Refactor install_flow method to use kytos/flow_man..." - kytos/of_lldp - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Pull Request — master (#56)

by Carlos

created 2020-12-02 20:01 UTC

build.main.Main.install_lldp_flow() A

↳ Parent: build.main.Main.handle_lldp_flows()

Complexity

Conditions

Size

Total Lines	25
Code Lines	13

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	11
CRAP Score	3

Importance

Changes

Metric	Value
cc	3
eloc	13
nop	2
dl	0
loc	25
rs	9.75
c	0
b	0
f	0
ccs	11
cts	11
cp	1
crap	3

"""NApp responsible to discover new switches and hosts."""
import struct

import requests
from flask import jsonify, request
from pyof.foundation.basic_types import DPID, UBInt16, UBInt32
from pyof.foundation.network_types import LLDP, VLAN, Ethernet, EtherType
from pyof.v0x01.common.action import ActionOutput as AO10
from pyof.v0x01.common.phy_port import Port as Port10
from pyof.v0x01.controller2switch.packet_out import PacketOut as PO10
from pyof.v0x04.common.action import ActionOutput as AO13
from pyof.v0x04.common.port import PortNo as Port13
from pyof.v0x04.controller2switch.packet_out import PacketOut as PO13

from kytos.core import KytosEvent, KytosNApp, log, rest
from kytos.core.helpers import listen_to
from napps.kytos.of_lldp import constants, settings


class Main(KytosNApp):
    """Main OF_LLDP NApp Class."""

    def setup(self):
        """Make this NApp run in a loop."""
        self.vlan_id = None
        self.polling_time = settings.POLLING_TIME
        if hasattr(settings, "FLOW_VLAN_VID"):
            self.vlan_id = settings.FLOW_VLAN_VID
        self.execute_as_loop(self.polling_time)

    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:
                # Interface marked to receive lldp packet
                # Only send LLDP packet to active interface
                if(not interface.lldp or not interface.is_active()
                   or not interface.is_enabled()):
                    continue
                # 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 None:
                    continue

                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)'
                msg += '\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)

    @listen_to('kytos/topology.switch.(enabled|disabled)')
    def handle_lldp_flows(self, event):
        """Install or remove flows in a switch.

        Install a flow to send LLDP packets to the controller. The proactive
        flow is installed whenever a switch is enabled. If the switch is
        disabled the flow is removed.

        Args:
            event (:class:`~kytos.core.events.KytosEvent`):
                Event with new switch information.

        """
        try:
            dpid = event.content['dpid']
            switch = self.controller.get_switch_by_dpid(dpid)
            of_version = switch.connection.protocol.version

        except AttributeError:
            of_version = None

        flow = self._build_lldp_flow(of_version)
        if flow:
            destination = switch.id
            endpoint = f'{settings.FLOW_MANAGER_URL}/flows/{destination}'
            data = {'flows': [flow]}
            if event.name == 'kytos/topology.switch.enabled':
                requests.post(endpoint, json=data)
            else:
                requests.delete(endpoint, json=data)

    @listen_to('kytos/of_core.v0x0[14].messages.in.ofpt_packet_in')
    def notify_uplink_detected(self, event):
        """Dispatch two KytosEvents to notify identified NNI interfaces.

        Args:
            event (:class:`~kytos.core.events.KytosEvent`):
                Event with an LLDP packet as data.

        """
        ethernet = self._unpack_non_empty(Ethernet, event.message.data)
        if ethernet.ether_type == EtherType.LLDP:
            try:
                lldp = self._unpack_non_empty(LLDP, ethernet.data)
                dpid = self._unpack_non_empty(DPID, lldp.chassis_id.sub_value)
            except struct.error:
                #: If we have a LLDP packet but we cannot unpack it, or the
                #: unpacked packet does not contain the dpid attribute, then
                #: we are dealing with a LLDP generated by someone else. Thus
                #: this packet is not useful for us and we may just ignore it.
                return

            switch_a = event.source.switch
            port_a = event.message.in_port
            switch_b = None
            port_b = None

            # in_port is currently a UBInt16 in v0x01 and an Int in v0x04.
            if isinstance(port_a, int):
                port_a = UBInt32(port_a)

            try:
                switch_b = self.controller.get_switch_by_dpid(dpid.value)
                of_version = switch_b.connection.protocol.version
                port_type = UBInt16 if of_version == 0x01 else UBInt32
                port_b = self._unpack_non_empty(port_type,
                                                lldp.port_id.sub_value)
            except AttributeError:
                log.debug("Couldn't find datapath %s.", dpid.value)

            # Return if any of the needed information are not available
            if not (switch_a and port_a and switch_b and port_b):
                return

            interface_a = switch_a.get_interface_by_port_no(port_a.value)
            interface_b = switch_b.get_interface_by_port_no(port_b.value)

            event_out = KytosEvent(name='kytos/of_lldp.interface.is.nni',
                                   content={'interface_a': interface_a,
                                            'interface_b': interface_b})
            self.controller.buffers.app.put(event_out)

    def notify_lldp_change(self, state, interface_ids):
        """Dispatch a KytosEvent to notify changes to the LLDP status."""
        content = {'attribute': 'LLDP',
                   'state': state,
                   'interface_ids': interface_ids}
        event_out = KytosEvent(name='kytos/of_lldp.network_status.updated',
                               content=content)
        self.controller.buffers.app.put(event_out)

    def shutdown(self):
        """End of the application."""
        log.debug('Shutting down...')

    @staticmethod
    def _build_lldp_packet_out(version, port_number, data):
        """Build a LLDP PacketOut message.

        Args:
            version (int): OpenFlow version
            port_number (int): Switch port number where the packet must be
                forwarded to.
            data (bytes): Binary data to be sent through the port.

        Returns:
            PacketOut message for the specific given OpenFlow version, if it
                is supported.
            None if the OpenFlow version is not supported.

        """
        if version == 0x01:
            action_output_class = AO10
            packet_out_class = PO10
        elif version == 0x04:
            action_output_class = AO13
            packet_out_class = PO13
        else:
            log.info('Openflow version %s is not yet supported.', version)
            return None

        output_action = action_output_class()
        output_action.port = port_number

        packet_out = packet_out_class()
        packet_out.data = data
        packet_out.actions.append(output_action)

        return packet_out

    def _build_lldp_flow(self, version):
        """Build a Flow message to send LLDP to the controller.

        Args:
            version (int): OpenFlow version.

        Returns:
            Flow dictionary message for the specific given OpenFlow version,
            if it is supported.
            None if the OpenFlow version is not supported.

        """
        flow = {}
        match = {}
        flow['priority'] = settings.FLOW_PRIORITY
        match['dl_type'] = EtherType.LLDP
        if self.vlan_id:
            match['dl_vlan'] = self.vlan_id
        flow['match'] = match

        if version == 0x01:
            flow['actions'] = [{'action_type': 'output',
                                'port': Port10.OFPP_CONTROLLER}]
        elif version == 0x04:
            flow['actions'] = [{'action_type': 'output',
                                'port': Port13.OFPP_CONTROLLER}]
        else:
            flow = None

        return flow

    @staticmethod
    def _unpack_non_empty(desired_class, data):
        """Unpack data using an instance of desired_class.

        Args:
            desired_class (class): The class to be used to unpack data.
            data (bytes): bytes to be unpacked.

        Return:
            An instance of desired_class class with data unpacked into it.

        Raises:
            UnpackException if the unpack could not be performed.

        """
        obj = desired_class()

        if hasattr(data, 'value'):
            data = data.value

        obj.unpack(data)

        return obj

    @staticmethod
    def _get_data(req):
        """Get request data."""
        data = req.get_json()  # Valid format { "interfaces": [...] }
        return data.get('interfaces', [])

    def _get_interfaces(self):
        """Get all interfaces."""
        interfaces = []
        for switch in list(self.controller.switches.values()):
            interfaces += list(switch.interfaces.values())
        return interfaces

    @staticmethod
    def _get_interfaces_dict(interfaces):
        """Return a dict of interfaces."""
        return {inter.id: inter for inter in interfaces}

    def _get_lldp_interfaces(self):
        """Get interfaces enabled to receive LLDP packets."""
        return [inter.id for inter in self._get_interfaces() if inter.lldp]

    @rest('v1/interfaces', methods=['GET'])
    def get_lldp_interfaces(self):
        """Return all the interfaces that have LLDP traffic enabled."""
        return jsonify({"interfaces": self._get_lldp_interfaces()}), 200

    @rest('v1/interfaces/disable', methods=['POST'])

    def disable_lldp(self):
        """Disables an interface to receive LLDP packets."""
        interface_ids = self._get_data(request)
        error_list = []  # List of interfaces that were not activated.
        changed_interfaces = []
        interface_ids = filter(None, interface_ids)
        interfaces = self._get_interfaces()
        if not interfaces:
            return jsonify("No interfaces were found."), 404
        interfaces = self._get_interfaces_dict(interfaces)
        for id_ in interface_ids:
            interface = interfaces.get(id_)
            if interface:
                interface.lldp = False
                changed_interfaces.append(id_)
            else:
                error_list.append(id_)
        if changed_interfaces:
            self.notify_lldp_change('disabled', changed_interfaces)
        if not error_list:
            return jsonify(
                "All the requested interfaces have been disabled."), 200

        # Return a list of interfaces that couldn't be disabled
        msg_error = "Some interfaces couldn't be found and deactivated: "
        return jsonify({msg_error:
                        error_list}), 400

    @rest('v1/interfaces/enable', methods=['POST'])

    def enable_lldp(self):
        """Enable an interface to receive LLDP packets."""
        interface_ids = self._get_data(request)
        error_list = []  # List of interfaces that were not activated.
        changed_interfaces = []
        interface_ids = filter(None, interface_ids)
        interfaces = self._get_interfaces()
        if not interfaces:
            return jsonify("No interfaces were found."), 404
        interfaces = self._get_interfaces_dict(interfaces)
        for id_ in interface_ids:
            interface = interfaces.get(id_)
            if interface:
                interface.lldp = True
                changed_interfaces.append(id_)
            else:
                error_list.append(id_)
        if changed_interfaces:
            self.notify_lldp_change('enabled', changed_interfaces)
        if not error_list:
            return jsonify(
                "All the requested interfaces have been enabled."), 200

        # Return a list of interfaces that couldn't be enabled
        msg_error = "Some interfaces couldn't be found and activated: "
        return jsonify({msg_error:
                        error_list}), 400

    @rest('v1/polling_time', methods=['GET'])
    def get_time(self):
        """Get LLDP polling time in seconds."""
        return jsonify({"polling_time": self.polling_time}), 200

    @rest('v1/polling_time', methods=['POST'])
    def set_time(self):
        """Set LLDP polling time."""
        # pylint: disable=attribute-defined-outside-init
        try:
            payload = request.get_json()
            polling_time = int(payload['polling_time'])
            if polling_time <= 0:
                raise ValueError(f"invalid polling_time {polling_time}, "
                                 "must be greater than zero")
            self.polling_time = polling_time
            self.execute_as_loop(self.polling_time)
            log.info("Polling time has been updated to %s"
                     " second(s), but this change will not be saved"
                     " permanently.", self.polling_time)
            return jsonify("Polling time has been updated."), 200
        except (ValueError, KeyError) as error:
            msg = f"This operation is not completed: {error}"
            return jsonify(msg), 400


1			"""NApp responsible to discover new switches and hosts."""
2	1		import struct
3
4	1		import requests
5	1		from flask import jsonify, request
6	1		from pyof.foundation.basic_types import DPID, UBInt16, UBInt32
7	1		from pyof.foundation.network_types import LLDP, VLAN, Ethernet, EtherType
8	1		from pyof.v0x01.common.action import ActionOutput as AO10
9	1		from pyof.v0x01.common.phy_port import Port as Port10
10	1		from pyof.v0x01.controller2switch.packet_out import PacketOut as PO10
11	1		from pyof.v0x04.common.action import ActionOutput as AO13
12	1		from pyof.v0x04.common.port import PortNo as Port13
13	1		from pyof.v0x04.controller2switch.packet_out import PacketOut as PO13
14
15	1		from kytos.core import KytosEvent, KytosNApp, log, rest
16	1		from kytos.core.helpers import listen_to
17	1		from napps.kytos.of_lldp import constants, settings
18
19
20	1		class Main(KytosNApp):
21			"""Main OF_LLDP NApp Class."""
22
23	1		def setup(self):
24			"""Make this NApp run in a loop."""
25	1		self.vlan_id = None
26	1		self.polling_time = settings.POLLING_TIME
27	1		if hasattr(settings, "FLOW_VLAN_VID"):
28	1		self.vlan_id = settings.FLOW_VLAN_VID
29	1		self.execute_as_loop(self.polling_time)
30
31	1		def execute(self):
32			"""Send LLDP Packets every 'POLLING_TIME' seconds to all switches."""
33	1		switches = list(self.controller.switches.values())
34	1		for switch in switches:
35	1		try:
36	1		of_version = switch.connection.protocol.version
37			except AttributeError:
38			of_version = None
39
40	1		if not switch.is_connected():
41			continue
42
43	1		if of_version == 0x01:
44	1		port_type = UBInt16
45	1		local_port = Port10.OFPP_LOCAL
46	1		elif of_version == 0x04:
47	1		port_type = UBInt32
48	1		local_port = Port13.OFPP_LOCAL
49			else:
50			# skip the current switch with unsupported OF version
51			continue
52
53	1		interfaces = list(switch.interfaces.values())
54	1		for interface in interfaces:
55			# Interface marked to receive lldp packet
56			# Only send LLDP packet to active interface
57	1		if(not interface.lldp or not interface.is_active()
58			or not interface.is_enabled()):
59			continue
60			# Avoid the interface that connects to the controller.
61	1		if interface.port_number == local_port:
62			continue
63
64	1		lldp = LLDP()
65	1		lldp.chassis_id.sub_value = DPID(switch.dpid)
66	1		lldp.port_id.sub_value = port_type(interface.port_number)
67
68	1		ethernet = Ethernet()
69	1		ethernet.ether_type = EtherType.LLDP
70	1		ethernet.source = interface.address
71	1		ethernet.destination = constants.LLDP_MULTICAST_MAC
72	1		ethernet.data = lldp.pack()
73			# self.vlan_id == None will result in a packet with no VLAN.
74	1		ethernet.vlans.append(VLAN(vid=self.vlan_id))
75
76	1		packet_out = self._build_lldp_packet_out(
77			of_version,
78			interface.port_number, ethernet.pack())
79
80	1		if packet_out is None:
81			continue
82
83	1		event_out = KytosEvent(
84			name='kytos/of_lldp.messages.out.ofpt_packet_out',
85			content={
86			'destination': switch.connection,
87			'message': packet_out})
88	1		self.controller.buffers.msg_out.put(event_out)
89	1		log.debug(
90			"Sending a LLDP PacketOut to the switch %s",
91			switch.dpid)
92
93	1		msg = '\n'
94	1		msg += 'Switch: %s (%s)\n'
95	1		msg += ' Interfaces: %s\n'
96	1		msg += ' -- LLDP PacketOut --\n'
97	1		msg += ' Ethernet: eth_type (%s) \| src (%s) \| dst (%s)'
98	1		msg += '\n'
99	1		msg += ' LLDP: Switch (%s) \| port (%s)'
100
101	1		log.debug(
102			msg,
103			switch.connection.address, switch.dpid,
104			switch.interfaces, ethernet.ether_type,
105			ethernet.source, ethernet.destination,
106			switch.dpid, interface.port_number)
107
108	1		@listen_to('kytos/topology.switch.(enabled\|disabled)')
109			def handle_lldp_flows(self, event):
110			"""Install or remove flows in a switch.
111
112			Install a flow to send LLDP packets to the controller. The proactive
113			flow is installed whenever a switch is enabled. If the switch is
114			disabled the flow is removed.
115
116			Args:
117			event (:class:`~kytos.core.events.KytosEvent`):
118			Event with new switch information.
119
120			"""
121	1		try:
122	1		dpid = event.content['dpid']
123	1		switch = self.controller.get_switch_by_dpid(dpid)
124	1		of_version = switch.connection.protocol.version
125
126			except AttributeError:
127			of_version = None
128
129	1		flow = self._build_lldp_flow(of_version)
130	1		if flow:
131	1		destination = switch.id
132	1		endpoint = f'{settings.FLOW_MANAGER_URL}/flows/{destination}'
133	1		data = {'flows': [flow]}
134	1		if event.name == 'kytos/topology.switch.enabled':
135	1		requests.post(endpoint, json=data)
136			else:
137	1		requests.delete(endpoint, json=data)
138
139	1		@listen_to('kytos/of_core.v0x0[14].messages.in.ofpt_packet_in')
140			def notify_uplink_detected(self, event):
141			"""Dispatch two KytosEvents to notify identified NNI interfaces.
142
143			Args:
144			event (:class:`~kytos.core.events.KytosEvent`):
145			Event with an LLDP packet as data.
146
147			"""
148	1		ethernet = self._unpack_non_empty(Ethernet, event.message.data)
149	1		if ethernet.ether_type == EtherType.LLDP:
150	1		try:
151	1		lldp = self._unpack_non_empty(LLDP, ethernet.data)
152	1		dpid = self._unpack_non_empty(DPID, lldp.chassis_id.sub_value)
153			except struct.error:
154			#: If we have a LLDP packet but we cannot unpack it, or the
155			#: unpacked packet does not contain the dpid attribute, then
156			#: we are dealing with a LLDP generated by someone else. Thus
157			#: this packet is not useful for us and we may just ignore it.
158			return
159
160	1		switch_a = event.source.switch
161	1		port_a = event.message.in_port
162	1		switch_b = None
163	1		port_b = None
164
165			# in_port is currently a UBInt16 in v0x01 and an Int in v0x04.
166	1		if isinstance(port_a, int):
167	1		port_a = UBInt32(port_a)
168
169	1		try:
170	1		switch_b = self.controller.get_switch_by_dpid(dpid.value)
171	1		of_version = switch_b.connection.protocol.version
172	1		port_type = UBInt16 if of_version == 0x01 else UBInt32
173	1		port_b = self._unpack_non_empty(port_type,
174			lldp.port_id.sub_value)
175			except AttributeError:
176			log.debug("Couldn't find datapath %s.", dpid.value)
177
178			# Return if any of the needed information are not available
179	1		if not (switch_a and port_a and switch_b and port_b):
180			return
181
182	1		interface_a = switch_a.get_interface_by_port_no(port_a.value)
183	1		interface_b = switch_b.get_interface_by_port_no(port_b.value)
184
185	1		event_out = KytosEvent(name='kytos/of_lldp.interface.is.nni',
186			content={'interface_a': interface_a,
187			'interface_b': interface_b})
188	1		self.controller.buffers.app.put(event_out)
189
190	1		def notify_lldp_change(self, state, interface_ids):
191			"""Dispatch a KytosEvent to notify changes to the LLDP status."""
192	1		content = {'attribute': 'LLDP',
193			'state': state,
194			'interface_ids': interface_ids}
195	1		event_out = KytosEvent(name='kytos/of_lldp.network_status.updated',
196			content=content)
197	1		self.controller.buffers.app.put(event_out)
198
199	1		def shutdown(self):
200			"""End of the application."""
201			log.debug('Shutting down...')
202
203	1		@staticmethod
204			def _build_lldp_packet_out(version, port_number, data):
205			"""Build a LLDP PacketOut message.
206
207			Args:
208			version (int): OpenFlow version
209			port_number (int): Switch port number where the packet must be
210			forwarded to.
211			data (bytes): Binary data to be sent through the port.
212
213			Returns:
214			PacketOut message for the specific given OpenFlow version, if it
215			is supported.
216			None if the OpenFlow version is not supported.
217
218			"""
219	1		if version == 0x01:
220	1		action_output_class = AO10
221	1		packet_out_class = PO10
222	1		elif version == 0x04:
223	1		action_output_class = AO13
224	1		packet_out_class = PO13
225			else:
226	1		log.info('Openflow version %s is not yet supported.', version)
227	1		return None
228
229	1		output_action = action_output_class()
230	1		output_action.port = port_number
231
232	1		packet_out = packet_out_class()
233	1		packet_out.data = data
234	1		packet_out.actions.append(output_action)
235
236	1		return packet_out
237
238	1		def _build_lldp_flow(self, version):
239			"""Build a Flow message to send LLDP to the controller.
240
241			Args:
242			version (int): OpenFlow version.
243
244			Returns:
245			Flow dictionary message for the specific given OpenFlow version,
246			if it is supported.
247			None if the OpenFlow version is not supported.
248
249			"""
250	1		flow = {}
251	1		match = {}
252	1		flow['priority'] = settings.FLOW_PRIORITY
253	1		match['dl_type'] = EtherType.LLDP
254	1		if self.vlan_id:
255	1		match['dl_vlan'] = self.vlan_id
256	1		flow['match'] = match
257
258	1		if version == 0x01:
259	1		flow['actions'] = [{'action_type': 'output',
260			'port': Port10.OFPP_CONTROLLER}]
261	1		elif version == 0x04:
262	1		flow['actions'] = [{'action_type': 'output',
263			'port': Port13.OFPP_CONTROLLER}]
264			else:
265			flow = None
266
267	1		return flow
268
269	1		@staticmethod
270			def _unpack_non_empty(desired_class, data):
271			"""Unpack data using an instance of desired_class.
272
273			Args:
274			desired_class (class): The class to be used to unpack data.
275			data (bytes): bytes to be unpacked.
276
277			Return:
278			An instance of desired_class class with data unpacked into it.
279
280			Raises:
281			UnpackException if the unpack could not be performed.
282
283			"""
284	1		obj = desired_class()
285
286	1		if hasattr(data, 'value'):
287	1		data = data.value
288
289	1		obj.unpack(data)
290
291	1		return obj
292
293	1		@staticmethod
294			def _get_data(req):
295			"""Get request data."""
296	1		data = req.get_json() # Valid format { "interfaces": [...] }
297	1		return data.get('interfaces', [])
298
299	1		def _get_interfaces(self):
300			"""Get all interfaces."""
301	1		interfaces = []
302	1		for switch in list(self.controller.switches.values()):
303	1		interfaces += list(switch.interfaces.values())
304	1		return interfaces
305
306	1		@staticmethod
307			def _get_interfaces_dict(interfaces):
308			"""Return a dict of interfaces."""
309	1		return {inter.id: inter for inter in interfaces}
310
311	1		def _get_lldp_interfaces(self):
312			"""Get interfaces enabled to receive LLDP packets."""
313	1		return [inter.id for inter in self._get_interfaces() if inter.lldp]
314
315	1		@rest('v1/interfaces', methods=['GET'])
316			def get_lldp_interfaces(self):
317			"""Return all the interfaces that have LLDP traffic enabled."""
318	1		return jsonify({"interfaces": self._get_lldp_interfaces()}), 200
319
320	1	View Code Duplication	@rest('v1/interfaces/disable', methods=['POST'])
			0 ignored issues – show Duplication introduced 2019-07-29 21:12 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
321			def disable_lldp(self):
322			"""Disables an interface to receive LLDP packets."""
323	1		interface_ids = self._get_data(request)
324	1		error_list = [] # List of interfaces that were not activated.
325	1		changed_interfaces = []
326	1		interface_ids = filter(None, interface_ids)
327	1		interfaces = self._get_interfaces()
328	1		if not interfaces:
329	1		return jsonify("No interfaces were found."), 404
330	1		interfaces = self._get_interfaces_dict(interfaces)
331	1		for id_ in interface_ids:
332	1		interface = interfaces.get(id_)
333	1		if interface:
334	1		interface.lldp = False
335	1		changed_interfaces.append(id_)
336			else:
337	1		error_list.append(id_)
338	1		if changed_interfaces:
339	1		self.notify_lldp_change('disabled', changed_interfaces)
340	1		if not error_list:
341	1		return jsonify(
342			"All the requested interfaces have been disabled."), 200
343
344			# Return a list of interfaces that couldn't be disabled
345	1		msg_error = "Some interfaces couldn't be found and deactivated: "
346	1		return jsonify({msg_error:
347			error_list}), 400
348
349	1	View Code Duplication	@rest('v1/interfaces/enable', methods=['POST'])
			0 ignored issues – show Duplication introduced 2019-07-29 21:12 UTC by Report Bug Copy Issue Report This code seems to be duplicated in your project. Loading history...
350			def enable_lldp(self):
351			"""Enable an interface to receive LLDP packets."""
352	1		interface_ids = self._get_data(request)
353	1		error_list = [] # List of interfaces that were not activated.
354	1		changed_interfaces = []
355	1		interface_ids = filter(None, interface_ids)
356	1		interfaces = self._get_interfaces()
357	1		if not interfaces:
358	1		return jsonify("No interfaces were found."), 404
359	1		interfaces = self._get_interfaces_dict(interfaces)
360	1		for id_ in interface_ids:
361	1		interface = interfaces.get(id_)
362	1		if interface:
363	1		interface.lldp = True
364	1		changed_interfaces.append(id_)
365			else:
366	1		error_list.append(id_)
367	1		if changed_interfaces:
368	1		self.notify_lldp_change('enabled', changed_interfaces)
369	1		if not error_list:
370	1		return jsonify(
371			"All the requested interfaces have been enabled."), 200
372
373			# Return a list of interfaces that couldn't be enabled
374	1		msg_error = "Some interfaces couldn't be found and activated: "
375	1		return jsonify({msg_error:
376			error_list}), 400
377
378	1		@rest('v1/polling_time', methods=['GET'])
379			def get_time(self):
380			"""Get LLDP polling time in seconds."""
381	1		return jsonify({"polling_time": self.polling_time}), 200
382
383	1		@rest('v1/polling_time', methods=['POST'])
384			def set_time(self):
385			"""Set LLDP polling time."""
386			# pylint: disable=attribute-defined-outside-init
387	1		try:
388	1		payload = request.get_json()
389	1		polling_time = int(payload['polling_time'])
390	1		if polling_time <= 0:
391			raise ValueError(f"invalid polling_time {polling_time}, "
392			"must be greater than zero")
393	1		self.polling_time = polling_time
394	1		self.execute_as_loop(self.polling_time)
395	1		log.info("Polling time has been updated to %s"
396			" second(s), but this change will not be saved"
397			" permanently.", self.polling_time)
398	1		return jsonify("Polling time has been updated."), 200
399	1		except (ValueError, KeyError) as error:
400	1		msg = f"This operation is not completed: {error}"
401			return jsonify(msg), 400
402

kytos / of_lldp

Pull Request — master (#56)

build.main.Main.install_lldp_flow() A

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