Exemple #1
0
    def setUp(self):
        self.negotiated = {}

        for asn4 in (True, False):
            neighbor = FakeNeighbor()
            neighbor.asn4 = asn4

            capa = Capabilities().new(neighbor, False)
            capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()

            # path = {}
            # for f in NLRI.known_families():
            # 	if neighbor.add_path:
            # 		path[f] = neighbor.add_path
            # capa[Capability.CODE.ADD_PATH] = path

            o1 = Open(Version(4), ASN(neighbor.local_as), HoldTime(180),
                      RouterID(neighbor.local_address.top()), capa)
            o2 = Open(Version(4), ASN(neighbor.peer_as), HoldTime(180),
                      RouterID(neighbor.peer_address.top()), capa)

            negotiated = Negotiated(neighbor)
            negotiated.sent(o1)
            negotiated.received(o2)

            self.negotiated[asn4] = negotiated
Exemple #2
0
    def setUp(self):
        self.negotiated = {}

        for asn4 in (True, False):
            neighbor = FakeNeighbor()
            neighbor.asn4 = asn4

            capa = Capabilities().new(neighbor, False)
            capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()

            # path = {}
            # for f in NLRI.known_families():
            # 	if neighbor.add_path:
            # 		path[f] = neighbor.add_path
            # capa[Capability.CODE.ADD_PATH] = path

            routerid_1 = str(neighbor.router_id)
            routerid_2 = '.'.join(
                str((int(_) + 1) % 250)
                for _ in str(neighbor.router_id).split('.', -1))

            o1 = Open(Version(4), ASN(neighbor.local_as), HoldTime(180),
                      RouterID(routerid_1), capa)
            o2 = Open(Version(4), ASN(neighbor.peer_as), HoldTime(180),
                      RouterID(routerid_2), capa)

            negotiated = Negotiated(neighbor)
            negotiated.sent(o1)
            negotiated.received(o2)

            self.negotiated[asn4] = negotiated
Exemple #3
0
def _negotiated(neighbor):
    path = {}
    for f in NLRI.known_families():
        if neighbor['capability']['add-path']:
            path[f] = neighbor['capability']['add-path']

    capa = Capabilities().new(neighbor, False)
    capa[Capability.CODE.ADD_PATH] = path
    capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()
    # capa[Capability.CODE.FOUR_BYTES_ASN] = True

    routerid_1 = str(neighbor['router-id'])
    routerid_2 = '.'.join(
        str((int(_) + 1) % 250)
        for _ in str(neighbor['router-id']).split('.', -1))

    o1 = Open(Version(4), ASN(neighbor['local-as']), HoldTime(180),
              RouterID(routerid_1), capa)
    o2 = Open(Version(4), ASN(neighbor['peer-as']), HoldTime(180),
              RouterID(routerid_2), capa)
    negotiated = Negotiated(neighbor)
    negotiated.sent(o1)
    negotiated.received(o2)
    # grouped = False
    return negotiated
Exemple #4
0
 def test_2_open(self):
     capabilities = Capabilities()
     o = Open(Version(4), ASN(65500), HoldTime(180), RouterID('127.0.0.1'), capabilities)
     self.assertEqual(o.version, 4)
     self.assertEqual(o.asn, 65500)
     self.assertEqual(o.router_id, RouterID('127.0.0.1'))
     self.assertEqual(o.hold_time, 180)
     self.assertEqual(o.capabilities, {})
Exemple #5
0
 def test_2_open(self):
     capabilities = Capabilities()
     o = Open(4, 65500, '127.0.0.1', capabilities, 180)
     self.assertEqual(o.version, 4)
     self.assertEqual(o.asn, 65500)
     self.assertEqual(o.router_id, RouterID('127.0.0.1'))
     self.assertEqual(o.hold_time, 180)
     self.assertEqual(o.capabilities, {})
Exemple #6
0
    def new_open(self, restarted):
        sent_open = Open(Version(4), self.neighbor.local_as,
                         self.neighbor.hold_time, self.neighbor.router_id,
                         Capabilities().new(self.neighbor, restarted))

        # we do not buffer open message in purpose
        for _ in self.write(sent_open):
            yield _NOP

        self.logger.message(self.me('>> %s' % sent_open))
        yield sent_open
Exemple #7
0
def check_open(neighbor, raw):
    import sys
    import traceback
    sys.excepthook = traceback.print_exception

    try:
        o = Open.unpack_message(raw, Direction.IN, _negotiated(neighbor))
        print(o)
    except Exception as exc:
        print()
        print("we could not decode this open message")
        print("here is the traceback to help to figure out why")
        print()
        raise
Exemple #8
0
    def new_open(self):
        if self.neighbor.local_as:
            local_as = self.neighbor.local_as
        elif self.negotiated.received_open:
            local_as = self.negotiated.received_open.asn
        else:
            raise RuntimeError('no ASN available for the OPEN message')

        sent_open = Open(
            Version(4), local_as, self.neighbor.hold_time,
            self.neighbor.router_id,
            Capabilities().new(self.neighbor, self.peer._restarted))

        # we do not buffer open message in purpose
        for _ in self.write(sent_open):
            yield _NOP

        self.logger.debug('>> %s' % sent_open, self.connection.session())
        yield sent_open
Exemple #9
0
def check_generation(neighbors):
    option.enabled['parser'] = True

    for name in neighbors.keys():
        neighbor = copy.deepcopy(neighbors[name])
        neighbor['local-as'] = neighbor['peer-as']

        path = {}
        for f in NLRI.known_families():
            if neighbor['capability']['add-path']:
                path[f] = neighbor['capability']['add-path']

        capa = Capabilities().new(neighbor, False)
        if path:
            capa[Capability.CODE.ADD_PATH] = path
        capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()

        routerid_1 = str(neighbor['router-id'])
        routerid_2 = '.'.join(
            str((int(_) + 1) % 250)
            for _ in str(neighbor['router-id']).split('.', -1))

        o1 = Open(Version(4), ASN(neighbor['local-as']), HoldTime(180),
                  RouterID(routerid_1), capa)
        o2 = Open(Version(4), ASN(neighbor['peer-as']), HoldTime(180),
                  RouterID(routerid_2), capa)
        negotiated = Negotiated(neighbor)
        negotiated.sent(o1)
        negotiated.received(o2)
        # grouped = False

        for _ in neighbor.rib.outgoing.updates(False):
            pass

        for change1 in neighbor.rib.outgoing.cached_changes():
            str1 = change1.extensive()
            packed = list(
                Update([change1.nlri],
                       change1.attributes).messages(negotiated))
            pack1 = packed[0]

            log.debug('parsed route requires %d updates' % len(packed),
                      'parser')
            log.debug('update size is %d' % len(pack1), 'parser')

            log.debug('parsed route %s' % str1, 'parser')
            log.debug('parsed hex   %s' % od(pack1), 'parser')

            # This does not take the BGP header - let's assume we will not break that :)
            try:
                log.debug('')  # new line

                pack1s = pack1[19:] if pack1.startswith(b'\xFF' *
                                                        16) else pack1
                update = Update.unpack_message(pack1s, negotiated)

                change2 = Change(update.nlris[0], update.attributes)
                str2 = change2.extensive()
                pack2 = list(
                    Update([update.nlris[0]],
                           update.attributes).messages(negotiated))[0]

                log.debug('recoded route %s' % str2, 'parser')
                log.debug('recoded hex   %s' % od(pack2), 'parser')

                str1 = str1.replace('attribute [ 0x04 0x80 0x00000064 ]',
                                    'med 100')
                str1r = (str1.lower().replace(' med 100', '').replace(
                    ' local-preference 100', '').replace(' origin igp', ''))
                str2r = (str2.lower().replace(' med 100', '').replace(
                    ' local-preference 100', '').replace(' origin igp', ''))
                str2r = str2r.replace(
                    'large-community [ 1:2:3 10:11:12 ]',
                    'attribute [ 0x20 0xc0 0x0000000100000002000000030000000a0000000b0000000c ]',
                )

                if 'next-hop self' in str1r:
                    if ':' in str1r:
                        str1r = str1r.replace('next-hop self', 'next-hop ::1')
                    else:
                        str1r = str1r.replace(
                            'next-hop self',
                            'next-hop %s' % neighbor['local-address'])

                if ' name ' in str1r:
                    parts = str1r.split(' ')
                    pos = parts.index('name')
                    str1r = ' '.join(parts[:pos] + parts[pos + 2:])

                skip = False

                if str1r != str2r:
                    if 'attribute [' in str1r and ' 0x00 ' in str1r:
                        # we do not decode non-transitive attributes
                        log.debug(
                            'skipping string check on update with non-transitive attribute(s)',
                            'parser')
                        skip = True
                    else:
                        log.debug('strings are different:', 'parser')
                        log.debug('[%s]' % (str1r), 'parser')
                        log.debug('[%s]' % (str2r), 'parser')
                        return False
                else:
                    log.debug('strings are fine', 'parser')

                if skip:
                    log.debug(
                        'skipping encoding for update with non-transitive attribute(s)',
                        'parser')
                elif pack1 != pack2:
                    log.debug('encoding are different', 'parser')
                    log.debug('[%s]' % (od(pack1)), 'parser')
                    log.debug('[%s]' % (od(pack2)), 'parser')
                    return False
                else:
                    log.debug('encoding is fine', 'parser')
                    log.debug('----------------------------------------',
                              'parser')

                log.debug('JSON nlri %s' % change1.nlri.json(), 'parser')
                log.debug('JSON attr %s' % change1.attributes.json(), 'parser')

            except Notify as exc:
                log.debug('----------------------------------------', 'parser')
                log.debug(str(exc), 'parser')
                log.debug('----------------------------------------', 'parser')
                return False
        neighbor.rib.clear()

    return True
Exemple #10
0
def check_update(neighbor, raw):
    option.enabled['parser'] = True

    neighbor = neighbor[list(neighbor)[0]]

    path = {}
    for f in NLRI.known_families():
        if neighbor['capability']['add-path']:
            path[f] = neighbor['capability']['add-path']

    capa = Capabilities().new(neighbor, False)
    capa[Capability.CODE.ADD_PATH] = path
    capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()
    # capa[Capability.CODE.FOUR_BYTES_ASN] = True

    routerid_1 = str(neighbor['router-id'])
    routerid_2 = '.'.join(
        str((int(_) + 1) % 250)
        for _ in str(neighbor['router-id']).split('.', -1))

    o1 = Open(Version(4), ASN(neighbor['local-as']), HoldTime(180),
              RouterID(routerid_1), capa)
    o2 = Open(Version(4), ASN(neighbor['peer-as']), HoldTime(180),
              RouterID(routerid_2), capa)
    negotiated = Negotiated(neighbor)
    negotiated.sent(o1)
    negotiated.received(o2)
    # grouped = False

    while raw:
        if raw.startswith(b'\xff' * 16):
            kind = raw[18]
            size = (raw[16] << 16) + raw[17]

            injected, raw = raw[19:size], raw[size:]

            if kind == 2:
                log.debug('the message is an update', 'parser')
                decoding = 'update'
            else:
                log.debug(
                    'the message is not an update (%d) - aborting' % kind,
                    'parser')
                return False
        else:
            log.debug('header missing, assuming this message is ONE update',
                      'parser')
            decoding = 'update'
            injected, raw = raw, ''

        try:
            # This does not take the BGP header - let's assume we will not break that :)
            update = Update.unpack_message(injected, negotiated)
        except Notify:
            import traceback

            log.error('could not parse the message', 'parser')
            log.error(traceback.format_exc(), 'parser')
            return False
        except Exception:
            import traceback

            log.error('could not parse the message', 'parser')
            log.error(traceback.format_exc(), 'parser')
            return False

        log.debug('', 'parser')  # new line
        for number in range(len(update.nlris)):
            change = Change(update.nlris[number], update.attributes)
            log.info(
                'decoded %s %s %s' %
                (decoding, change.nlri.action, change.extensive()), 'parser')
        log.info(
            'update json %s' % Response.JSON(json_version).update(
                neighbor, 'in', update, None, '', ''), 'parser')

    return True
Exemple #11
0
    def _from_json(self, string):
        try:
            parsed = json.loads(string)
        except ValueError:
            print >> sys.stderr, 'invalid JSON message'
            sys.exit(1)

        if parsed.get('exabgp', '0.0.0') != json_version:
            print >> sys.stderr, 'invalid json version', string
            sys.exit(1)

        content = parsed.get('type', '')

        if not content:
            print >> sys.stderr, 'invalid json content', string
            sys.exit(1)

        neighbor = _FakeNeighbor(
            parsed['neighbor']['address']['local'],
            parsed['neighbor']['address']['peer'],
            parsed['neighbor']['asn']['local'],
            parsed['neighbor']['asn']['peer'],
        )

        if content == 'state':
            self._state()
            return string

        direction = parsed['neighbor']['direction']
        category = parsed['neighbor']['message']['category']
        header = parsed['neighbor']['message']['header']
        body = parsed['neighbor']['message']['body']
        raw = ''.join(
            chr(int(body[_:_ + 2], 16)) for _ in range(0, len(body), 2))

        if content == 'open':
            message = Open.unpack_message(raw)
            self._open(direction, message)
            return self.encoder.open(neighbor, direction, message, header,
                                     body)

        if content == 'keapalive':
            return self.encoder.keepalive(neighbor, direction, header, body)

        if content == 'notification':
            message = Notification.unpack_message(raw)
            return self.encoder.notification(neighbor, direction, message,
                                             header, body)

        if not self.negotiated:
            print >> sys.stderr, 'invalid message sequence, open not exchange not complete', string
            sys.exit(1)

        message = Message.unpack(category, raw, self.negotiated)

        if content == 'update':
            return self.encoder.update(neighbor, direction, message, header,
                                       body)

        if content == 'eor':  # XXX: Should not be required
            return self.encoder.update(neighbor, direction, message, header,
                                       body)

        if content == 'refresh':
            return self.json.refresh(neighbor, direction, message, header,
                                     body)

        if content == 'operational':
            return self.json.refresh(neighbor, direction, message, header,
                                     body)

        raise RuntimeError(
            'the programer is a monkey and forgot a JSON message type')
Exemple #12
0
def check_update(neighbor, raw):
    logger = Logger()
    logger._option.parser = True
    logger.parser('\ndecoding routes in configuration')

    neighbor = neighbor[neighbor.keys()[0]]

    path = {}
    for f in NLRI.known_families():
        if neighbor.add_path:
            path[f] = neighbor.add_path

    capa = Capabilities().new(neighbor, False)
    capa[Capability.CODE.ADD_PATH] = path
    capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()
    # capa[Capability.CODE.FOUR_BYTES_ASN] = True

    routerid_1 = str(neighbor.router_id)
    routerid_2 = '.'.join(
        str((int(_) + 1) % 250)
        for _ in str(neighbor.router_id).split('.', -1))

    o1 = Open(4, neighbor.local_as, routerid_1, capa, 180)
    o2 = Open(4, neighbor.peer_as, routerid_2, capa, 180)
    negotiated = Negotiated(neighbor)
    negotiated.sent(o1)
    negotiated.received(o2)
    # grouped = False

    while raw:
        if raw.startswith('\xff' * 16):
            kind = ord(raw[18])
            size = (ord(raw[16]) << 16) + (ord(raw[17]))

            injected, raw = raw[19:size], raw[size:]

            if kind == 2:
                logger.parser('the message is an update')
                decoding = 'update'
            else:
                logger.parser('the message is not an update (%d) - aborting' %
                              kind)
                return False
        else:
            logger.parser(
                'header missing, assuming this message is ONE update')
            decoding = 'update'
            injected, raw = raw, ''

        try:
            # This does not take the BGP header - let's assume we will not break that :)
            update = Update.unpack_message(injected, negotiated)
        except KeyboardInterrupt:
            raise
        except Notify, exc:
            logger.parser('could not parse the message')
            logger.parser(str(exc))
            return False
        except Exception, exc:
            logger.parser('could not parse the message')
            logger.parser(str(exc))
            return False
Exemple #13
0
	def _from_json (self, string):
		try:
			parsed = json.loads(string)
		except ValueError:
			print >> sys.stderr, 'invalid JSON message'
			sys.exit(1)

		if parsed.get('exabgp','0.0.0') != json_version:
			print >> sys.stderr, 'invalid json version', string
			sys.exit(1)

		content = parsed.get('type','')

		if not content:
			print >> sys.stderr, 'invalid json content', string
			sys.exit(1)

		neighbor = _FakeNeighbor(
			parsed['neighbor']['address']['local'],
			parsed['neighbor']['address']['peer'],
			parsed['neighbor']['asn']['local'],
			parsed['neighbor']['asn']['peer'],
		)

		if content == 'state':
			self._state()
			return string

		direction = parsed['neighbor']['direction']
		category = parsed['neighbor']['message']['category']
		header = parsed['neighbor']['message']['header']
		body = parsed['neighbor']['message']['body']
		raw = ''.join(chr(int(body[_:_+2],16)) for _ in range(0,len(body),2))

		if content == 'open':
			message = Open.unpack_message(raw)
			self._open(direction,message)
			return self.encoder.open(neighbor,direction,message,header,body)

		if content == 'keapalive':
			return self.encoder.keepalive(neighbor,direction,header,body)

		if content == 'notification':
			message = Notification.unpack_message(raw)
			return self.encoder.notification(neighbor,direction,message,header,body)

		if not self.negotiated:
			print >> sys.stderr, 'invalid message sequence, open not exchange not complete', string
			sys.exit(1)

		message = Message.unpack(category,raw,self.negotiated)

		if content == 'update':
			return self.encoder.update(neighbor, direction, message, header,body)

		if content == 'eor':  # XXX: Should not be required
			return self.encoder.update(neighbor, direction, message, header,body)

		if content == 'refresh':
			return self.json.refresh(neighbor, direction, message, header,body)

		if content == 'operational':
			return self.json.refresh(neighbor, direction, message, header,body)

		raise RuntimeError('the programer is a monkey and forgot a JSON message type')
Exemple #14
0
def check_update(neighbor, raw):
    logger = Logger()
    logger._option.parser = True
    logger.parser('\ndecoding routes in configuration')

    neighbor = neighbor[neighbor.keys()[0]]

    path = {}
    for f in NLRI.known_families():
        if neighbor.add_path:
            path[f] = neighbor.add_path

    capa = Capabilities().new(neighbor, False)
    capa[Capability.CODE.ADD_PATH] = path
    capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()
    # capa[Capability.CODE.FOUR_BYTES_ASN] = True

    routerid_1 = str(neighbor.router_id)
    routerid_2 = '.'.join(
        str((int(_) + 1) % 250)
        for _ in str(neighbor.router_id).split('.', -1))

    o1 = Open(Version(4), ASN(neighbor.local_as), HoldTime(180),
              RouterID(routerid_1), capa)
    o2 = Open(Version(4), ASN(neighbor.peer_as), HoldTime(180),
              RouterID(routerid_2), capa)
    negotiated = Negotiated(neighbor)
    negotiated.sent(o1)
    negotiated.received(o2)
    # grouped = False

    while raw:
        if raw.startswith('\xff' * 16):
            kind = ord(raw[18])
            size = (ord(raw[16]) << 16) + (ord(raw[17]))

            injected, raw = raw[19:size], raw[size:]

            if kind == 2:
                logger.parser('the message is an update')
                decoding = 'update'
            else:
                logger.parser('the message is not an update (%d) - aborting' %
                              kind)
                return False
        else:
            logger.parser(
                'header missing, assuming this message is ONE update')
            decoding = 'update'
            injected, raw = raw, ''

        try:
            # This does not take the BGP header - let's assume we will not break that :)
            update = Update.unpack_message(injected, negotiated)
        except KeyboardInterrupt:
            raise
        except Notify:
            logger.parser('could not parse the message', 'error')
            logger.parser(traceback.format_exc(), 'error')
            return False
        except StandardError:
            logger.parser('could not parse the message', 'error')
            logger.parser(traceback.format_exc(), 'error')
            return False

        logger.parser('')  # new line
        for number in range(len(update.nlris)):
            change = Change(update.nlris[number], update.attributes)
            logger.parser('decoded %s %s %s' %
                          (decoding, change.nlri.action, change.extensive()))
        logger.parser(
            'update json %s' %
            Response.JSON(json_version).update(neighbor, 'in', update, '', ''))

    return True
Exemple #15
0
	def _from_json (self, json_string):
		try:
			parsed = json.loads(json_string)
		except ValueError:
			print('invalid JSON message', file=sys.stderr)
			sys.exit(1)

		if parsed.get('exabgp','0.0.0') != json_version:
			print('invalid json version', json_string, file=sys.stderr)
			sys.exit(1)

		content = parsed.get('type','')

		if not content:
			print('invalid json content', json_string, file=sys.stderr)
			sys.exit(1)

		neighbor = _FakeNeighbor(
			parsed['neighbor']['address']['local'],
			parsed['neighbor']['address']['peer'],
			parsed['neighbor']['asn']['local'],
			parsed['neighbor']['asn']['peer'],
		)

		if content == 'state':
			self._state()
			return json_string

		direction = parsed['neighbor']['direction']
		category = parsed['neighbor']['message']['category']
		header = parsed['neighbor']['message']['header']
		body = parsed['neighbor']['message']['body']
		data = concat_bytes_i(character(int(body[_:_+2],16)) for _ in range(0,len(body),2))

		if content == 'open':
			message = Open.unpack_message(data)
			self._open(direction,message)
			return self.encoder.open(neighbor,direction,message,None,header,body)

		if content == 'keepalive':
			return self.encoder.keepalive(neighbor,direction,None,header,body)

		if content == 'notification':
			# XXX: Use the code of the Notifcation class here ..
			message = Notification.unpack_message(data)

			if (message.code, message.subcode) != (6, 2):
				message.data = data if not len([_ for _ in data if _ not in string.printable]) else hexstring(data)
				return self.encoder.notification(neighbor,direction,message,None,header,body)

			if len(data) == 0:
				# shutdown without shutdown communication (the old fashioned way)
				message.data = ''
				return self.encoder.notification(neighbor,direction,message,None,header,body)

			# draft-ietf-idr-shutdown or the peer was using 6,2 with data

			shutdown_length  = ordinal(data[0])
			data = data[1:]

			if shutdown_length == 0:
				message.data = "empty Shutdown Communication."
				# move offset past length field
				return self.encoder.notification(neighbor,direction,message,None,header,body)

			if len(data) < shutdown_length:
				message.data = "invalid Shutdown Communication (buffer underrun) length : %i [%s]" % (shutdown_length, hexstring(data))
				return self.encoder.notification(neighbor,direction,message,None,header,body)

			if shutdown_length > 128:
				message.data = "invalid Shutdown Communication (too large) length : %i [%s]" % (shutdown_length, hexstring(data))
				return self.encoder.notification(neighbor,direction,message,None,header,body)

			try:
				message.data = 'Shutdown Communication: "%s"' % \
					data[:shutdown_length].decode('utf-8').replace('\r',' ').replace('\n',' ')
			except UnicodeDecodeError:
				message.data = "invalid Shutdown Communication (invalid UTF-8) length : %i [%s]" % (shutdown_length, hexstring(data))
				return self.encoder.notification(neighbor,direction,message,None,header,body)

			trailer = data[shutdown_length:]
			if trailer:
				message.data += ", trailing data: " + hexstring(trailer)

			return self.encoder.notification(neighbor,direction,message,None,header,body)

		if not self.negotiated:
			print('invalid message sequence, open not exchange not complete', json_string, file=sys.stderr)
			sys.exit(1)

		message = Message.unpack(category,data,self.negotiated)

		if content == 'update':
			return self.encoder.update(neighbor, direction, message, None, header,body)

		if content == 'eor':  # XXX: Should not be required
			return self.encoder.update(neighbor, direction, message, None, header,body)

		if content == 'refresh':
			return self.json.refresh(neighbor, direction, message, None, header,body)

		if content == 'operational':
			return self.json.refresh(neighbor, direction, message, None, header,body)

		raise RuntimeError('the programer is a monkey and forgot a JSON message type')
Exemple #16
0
    def _from_json(self, direction, json_string):
        try:
            parsed = json.loads(json_string)
        except ValueError:
            print('invalid JSON message', file=sys.stderr)
            sys.exit(1)

        if parsed.get('exabgp', '0.0.0') != json_version:
            print('invalid json version', json_string, file=sys.stderr)
            sys.exit(1)

        content = parsed.get('type', '')

        if not content:
            print('invalid json content', json_string, file=sys.stderr)
            sys.exit(1)

        neighbor = _FakeNeighbor(
            parsed['neighbor']['address']['local'],
            parsed['neighbor']['address']['peer'],
            parsed['neighbor']['asn']['local'],
            parsed['neighbor']['asn']['peer'],
        )

        if content == 'state':
            self._state()
            return json_string

        direction = parsed['neighbor']['direction']
        category = parsed['neighbor']['message']['category']
        header = parsed['neighbor']['message']['header']
        body = parsed['neighbor']['message']['body']
        data = b''.join(bytes([int(body[_ : _ + 2], 16)]) for _ in range(0, len(body), 2))

        if content == 'open':
            message = Open.unpack_message(data)
            self._open(direction, message)
            return self.encoder.open(neighbor, direction, message, None, header, body)

        if content == 'keepalive':
            return self.encoder.keepalive(neighbor, direction, None, header, body)

        if content == 'notification':
            # XXX: Use the code of the Notifcation class here ..
            message = Notification.unpack_message(data)

            if (message.code, message.subcode) != (6, 2):
                message.data = data if not len([_ for _ in data if _ not in string.printable]) else hexstring(data)
                return self.encoder.notification(neighbor, direction, message, None, header, body)

            if len(data) == 0:
                # shutdown without shutdown communication (the old fashioned way)
                message.data = ''
                return self.encoder.notification(neighbor, direction, message, None, header, body)

            # draft-ietf-idr-shutdown or the peer was using 6,2 with data

            shutdown_length = data[0]
            data = data[1:]

            if shutdown_length == 0:
                message.data = "empty Shutdown Communication."
                # move offset past length field
                return self.encoder.notification(neighbor, direction, message, None, header, body)

            if len(data) < shutdown_length:
                message.data = "invalid Shutdown Communication (buffer underrun) length : %i [%s]" % (
                    shutdown_length,
                    hexstring(data),
                )
                return self.encoder.notification(neighbor, direction, message, None, header, body)

            if shutdown_length > 128:
                message.data = "invalid Shutdown Communication (too large) length : %i [%s]" % (
                    shutdown_length,
                    hexstring(data),
                )
                return self.encoder.notification(neighbor, direction, message, None, header, body)

            try:
                message.data = 'Shutdown Communication: "%s"' % data[:shutdown_length].decode('utf-8').replace(
                    '\r', ' '
                ).replace('\n', ' ')
            except UnicodeDecodeError:
                message.data = "invalid Shutdown Communication (invalid UTF-8) length : %i [%s]" % (
                    shutdown_length,
                    hexstring(data),
                )
                return self.encoder.notification(neighbor, direction, message, None, header, body)

            trailer = data[shutdown_length:]
            if trailer:
                message.data += ", trailing data: " + hexstring(trailer)

            return self.encoder.notification(neighbor, direction, message, None, header, body)

        if not self.negotiated:
            print('invalid message sequence, open not exchange not complete', json_string, file=sys.stderr)
            sys.exit(1)

        message = Message.unpack(category, data, direction, self.negotiated)

        if content == 'update':
            return self.encoder.update(neighbor, direction, message, None, header, body)

        if content == 'eor':  # XXX: Should not be required
            return self.encoder.update(neighbor, direction, message, None, header, body)

        if content == 'refresh':
            return self.json.refresh(neighbor, direction, message, None, header, body)

        if content == 'operational':
            return self.json.refresh(neighbor, direction, message, None, header, body)

        raise RuntimeError('the programer is a monkey and forgot a JSON message type')
Exemple #17
0
def check_neighbor(neighbors):
    logger = Logger()
    logger._option.parser = True

    if not neighbors:
        logger.parser('\ncould not find neighbor(s) to check')
        return False

    logger.parser('\ndecoding routes in configuration')

    for name in neighbors.keys():
        neighbor = neighbors[name]

        path = {}
        for f in NLRI.known_families():
            if neighbor.add_path:
                path[f] = neighbor.add_path

        capa = Capabilities().new(neighbor, False)
        if path:
            capa[Capability.CODE.ADD_PATH] = path
        capa[Capability.CODE.MULTIPROTOCOL] = neighbor.families()

        o1 = Open(4, neighbor.local_as, str(neighbor.local_address), capa, 180)
        o2 = Open(4, neighbor.peer_as, str(neighbor.peer_address), capa, 180)
        negotiated = Negotiated(neighbor)
        negotiated.sent(o1)
        negotiated.received(o2)
        # grouped = False

        for _ in neighbor.rib.outgoing.updates(False):
            pass

        for change1 in neighbor.rib.outgoing.sent_changes():
            str1 = change1.extensive()
            packed = list(
                Update([change1.nlri],
                       change1.attributes).messages(negotiated))
            pack1 = packed[0]

            logger.parser('parsed route requires %d updates' % len(packed))
            logger.parser('parsed route requires %d updates' % len(packed))
            logger.parser('update size is %d' % len(pack1))

            logger.parser('parsed route %s' % str1)
            logger.parser('parsed hex   %s' % od(pack1))

            # This does not take the BGP header - let's assume we will not break that :)
            try:
                logger.parser('')  # new line

                pack1s = pack1[19:] if pack1.startswith('\xFF' * 16) else pack1
                update = Update.unpack_message(pack1s, negotiated)

                change2 = Change(update.nlris[0], update.attributes)
                str2 = change2.extensive()
                pack2 = list(
                    Update([update.nlris[0]],
                           update.attributes).messages(negotiated))[0]

                logger.parser('recoded route %s' % str2)
                logger.parser('recoded hex   %s' % od(pack2))

                str1r = str1.replace(' med 100', '').replace(
                    ' local-preference 100', '').replace(' origin igp', '')
                str2r = str2.replace(' med 100', '').replace(
                    ' local-preference 100', '').replace(' origin igp', '')

                if ' name ' in str1r:
                    parts = str1r.split(' ')
                    pos = parts.index('name')
                    str1r = ' '.join(parts[:pos] + parts[pos + 2:])

                skip = False

                if str1r != str2r:
                    if 'attribute [' in str1r and ' 0x00 ' in str1r:
                        # we do not decode non-transitive attributes
                        logger.parser(
                            'skipping string check on update with non-transitive attribute(s)'
                        )
                        skip = True
                    else:
                        logger.parser('strings are different:')
                        logger.parser('[%s]' % (str1r))
                        logger.parser('[%s]' % (str2r))
                        return False
                else:
                    logger.parser('strings are fine')

                if skip:
                    logger.parser(
                        'skipping encoding for update with non-transitive attribute(s)'
                    )
                elif pack1 != pack2:
                    logger.parser('encoding are different')
                    logger.parser('[%s]' % (od(pack1)))
                    logger.parser('[%s]' % (od(pack2)))
                    return False
                else:
                    logger.parser('encoding is fine')
                    logger.parser('----------------------------------------')

                logger.parser('JSON nlri %s' % change1.nlri.json())
                logger.parser('JSON attr %s' % change1.attributes.json())

            except Notify, exc:
                logger.parser('----------------------------------------')
                logger.parser(str(exc))
                logger.parser('----------------------------------------')
                return False
        neighbor.rib.clear()