xos/synchronizer/models/models.py - rcord - Gitiles


 # Copyright 2017-present Open Networking Foundation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 # http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import re
 import socket
 import random
 from django.core.exceptions import ObjectDoesNotExist
 from xos.exceptions import XOSValidationError, XOSProgrammingError, XOSPermissionDenied, XOSConfigurationError
 from models_decl import RCORDService_decl, RCORDSubscriber_decl, RCORDIpAddress_decl, BandwidthProfile_decl

 range_of_tags = list(range(16,4096))

 class BandwidthProfile(BandwidthProfile_decl):
     class Meta:
         proxy = True


 class RCORDService(RCORDService_decl):
     class Meta:
         proxy = True


 class RCORDIpAddress(RCORDIpAddress_decl):
     class Meta:
         proxy = True

     def save(self, *args, **kwargs):
         try:
             if ":" in self.ip:
                 # it's an IPv6 address
                 socket.inet_pton(socket.AF_INET6, self.ip)
             else:
                 # it's an IPv4 address
                 socket.inet_pton(socket.AF_INET, self.ip)
         except socket.error:
             raise XOSValidationError("The IP specified is not valid: %s" % self.ip)
         super(RCORDIpAddress, self).save(*args, **kwargs)
         return


 class RCORDSubscriber(RCORDSubscriber_decl):

     class Meta:
         proxy = True

     def invalidate_related_objects(self):
         # Dirty all vSGs related to this subscriber, so the vSG synchronizer
         # will run.

         # FIXME: This should be reimplemented when multiple-objects-per-synchronizer is implemented.

         for link in self.subscribed_links.all():
             outer_service_instance = link.provider_service_instance
             # TODO: We may need to invalidate the vOLT too...
             for link in outer_service_instance.subscribed_links.all():
                 inner_service_instance = link.provider_service_instance
                 inner_service_instance.save(update_fields=["updated"])

     def generate_s_tag(self):

         # unused_s_tags_for_c_tag() this function will return a list of unused s_tags for that c_tag

         tag = random.choice(self.unused_s_tags_for_c_tag())

         # Check that combination(c_tag,s_tag) is unique.
         # If the combination is not unique it will keep on calling this function recursively till it gets a unique combination.

         self.s_tag = tag
         if None != self.get_used_s_c_tag_subscriber_id():
             return self.generate_s_tag()
         else:
             return tag

     def generate_c_tag(self):

         # unused_c_tags_for_s_tag() this function will return a list of unused c_tags for the given s_tag

         tag = random.choice(self.unused_c_tags_for_s_tag())

         # Check that this random generated value is valid across given ONU-first check.
         # If the value is valid it will assign c_tag wth it and do second check.
         # If the value is not valid below function is recursively called till it gets a unique value.

         if tag in self.get_used_c_tags():
             return self.generate_c_tag()
         else:
             self.c_tag = tag

         # Scenario if we don't have a s_tag.
         # Second check-verify that combination is unique across.

         if not self.s_tag:
             self.s_tag = self.generate_s_tag()
             return tag
         elif None != self.get_used_s_c_tag_subscriber_id():
             return self.generate_c_tag()
         else:
             return tag

     def unused_c_tags_for_s_tag(self):

         #This function will return a list of unused c_tags

         #If there is no s_tag
         global range_of_tags

         #If there's a s_tag, then return unused c_tags for that s_tag
         subscribers_with_same_s_tag = RCORDSubscriber.objects.filter(s_tag = self.s_tag)
         used_c_tags = [s.c_tag for s in subscribers_with_same_s_tag]
         if len(used_c_tags) == 0:
             return range_of_tags
         else:
             list_of_unused_c_tags_for_s_tag = list(set(range_of_tags) - set(used_c_tags))
             if len(list_of_unused_c_tags_for_s_tag) == 0:
                 raise XOSConfigurationError("All the c_tags are exhausted for this s_tag: %s"% self.s_tag)
             else:
                 return list_of_unused_c_tags_for_s_tag

     def unused_s_tags_for_c_tag(self):

         #This function will return a list of unused s_tags

         global range_of_tags
         #If there's a c_tag, then return unused s_tags for that c_tag
         subscribers_with_same_c_tag = RCORDSubscriber.objects.filter(c_tag = self.c_tag)
         used_s_tags = [s.s_tag for s in subscribers_with_same_c_tag]
         if len(used_s_tags) == 0:
             return range_of_tags
         else:
             list_of_unused_s_tags_for_c_tag = list(set(range_of_tags) - set(used_s_tags))
             if len(list_of_unused_s_tags_for_c_tag) == 0:
                 raise XOSConfigurationError("All the s_tags are exhausted for this c_tag: %s"% self.c_tag)
             else:
                 return list_of_unused_s_tags_for_c_tag
     def get_same_onu_subscribers(self):
         return RCORDSubscriber.objects.filter(onu_device=self.onu_device)

     def get_same_s_c_tag_subscribers(self):
         return RCORDSubscriber.objects.filter(c_tag=self.c_tag, s_tag=self.s_tag)

     def get_used_c_tags(self):
         same_onu_subscribers = self.get_same_onu_subscribers()
         same_onu_subscribers = [s for s in same_onu_subscribers if s.id != self.id]
         used_tags = [s.c_tag for s in same_onu_subscribers]
         return used_tags

     def get_used_s_c_tag_subscriber_id(self):
         # Function to check c_tag and s_tag combination are unique across.
         same_s_c_tag_subscribers = self.get_same_s_c_tag_subscribers()
         same_s_c_tag_subscribers = [s for s in same_s_c_tag_subscribers if s.id != self.id]
         if len(same_s_c_tag_subscribers) > 0:
             return same_s_c_tag_subscribers[0].id
         else:
             return None

     def validate_tech_profile_id(self):
         if self.owner.leaf_model.access != "voltha":
             # if we're not using VOLTHA we don't need to validate this
             return True

         volt = None
         for ps in self.owner.provider_services:
             provider_service = ps.leaf_model
             if provider_service.name.lower() == "volt":
                 volt = provider_service

         technology = volt.get_olt_technology_from_unu_sn(self.onu_device)

         try:
             tp = volt.get_tech_profile(technology, self.tech_profile_id)
             return True
         except ObjectDoesNotExist:
             return False


     def save(self, *args, **kwargs):
         self.validate_unique_service_specific_id(none_okay=True)

         # VSGServiceInstance will extract the creator from the Subscriber, as it needs a creator to create its
         # Instance.
         if not self.creator:
             # If we weren't passed an explicit creator, then we will assume the caller is the creator.
             if not getattr(self, "caller", None):
                 raise XOSProgrammingError("RCORDSubscriber's self.caller was not set")
             self.creator = self.caller

         # validate MAC Address
         if hasattr(self, 'mac_address') and self.mac_address:
             if not re.match("[0-9a-f]{2}([-:]?)[0-9a-f]{2}(\\1[0-9a-f]{2}){4}$", self.mac_address.lower()):
                 raise XOSValidationError("The MAC address specified is not valid: %s" % self.mac_address)

         # validate c_tag
         if self.c_tag:
             is_update_with_same_tag = False

             if not self.is_new:
                 # if it is an update, but the tag is the same, skip validation
                 existing = RCORDSubscriber.objects.filter(id=self.id)

                 if len(existing) > 0 and existing[0].c_tag == self.c_tag and existing[0].id == self.id:
                     is_update_with_same_tag = True

             if self.c_tag in self.get_used_c_tags() and not is_update_with_same_tag:
                 raise XOSValidationError(
                     "The c_tag you specified (%s) has already been used on device %s" %
                     (self.c_tag, self.onu_device))

         # validate s_tag and c_tag combination
         if self.c_tag and self.s_tag:
             is_update_with_same_tag = False

             if not self.is_new:
                 # if it is an update, but the tags are the same, skip validation
                 existing = RCORDSubscriber.objects.filter(id=self.id)
                 if len(existing) > 0 and existing[0].c_tag == self.c_tag and existing[0].s_tag == self.s_tag and existing[0].id == self.id:
                     is_update_with_same_tag = True

             id = self.get_used_s_c_tag_subscriber_id()
             if None != id and not is_update_with_same_tag:
                 raise XOSValidationError("The c_tag(%s) and s_tag(%s) pair you specified,has already been used by Subscriber with Id (%s)" % (self.c_tag,self.s_tag,id))


         if not self.c_tag:
             self.c_tag = self.generate_c_tag()

         elif not self.s_tag:
             self.s_tag = self.generate_s_tag()

         self.set_owner()

         if self.status != "pre-provisioned" and \
                 hasattr(self.owner.leaf_model, "access") and \
                 self.owner.leaf_model.access == "voltha" and \
                 not self.deleted:

             # if the access network is managed by voltha, validate that onu_device actually exist
             # we assume RCORDService is connected only to the vOLTService
             volt_service = self.owner.provider_services[0].leaf_model

             if not volt_service.has_access_device(self.onu_device):
                 raise XOSValidationError("The onu_device you specified (%s) does not exists" % self.onu_device)

             # if the access network is managed by voltha, validate that the tech_profile_id actually exists
             if not self.validate_tech_profile_id():
                 raise XOSValidationError("The technology profile you specified [%s] does not exist" % self.tech_profile_id)

         super(RCORDSubscriber, self).save(*args, **kwargs)
         self.invalidate_related_objects()
         return

	# Copyright 2017-present Open Networking Foundation
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.
	import re
	import socket
	import random
	from django.core.exceptions import ObjectDoesNotExist
	from xos.exceptions import XOSValidationError, XOSProgrammingError, XOSPermissionDenied, XOSConfigurationError
	from models_decl import RCORDService_decl, RCORDSubscriber_decl, RCORDIpAddress_decl, BandwidthProfile_decl

	range_of_tags = list(range(16,4096))

	class BandwidthProfile(BandwidthProfile_decl):
	class Meta:
	proxy = True


	class RCORDService(RCORDService_decl):
	class Meta:
	proxy = True


	class RCORDIpAddress(RCORDIpAddress_decl):
	class Meta:
	proxy = True

	def save(self, args, *kwargs):
	try:
	if ":" in self.ip:
	# it's an IPv6 address
	socket.inet_pton(socket.AF_INET6, self.ip)
	else:
	# it's an IPv4 address
	socket.inet_pton(socket.AF_INET, self.ip)
	except socket.error:
	raise XOSValidationError("The IP specified is not valid: %s" % self.ip)
	super(RCORDIpAddress, self).save(args, *kwargs)
	return


	class RCORDSubscriber(RCORDSubscriber_decl):

	class Meta:
	proxy = True

	def invalidate_related_objects(self):
	# Dirty all vSGs related to this subscriber, so the vSG synchronizer
	# will run.

	# FIXME: This should be reimplemented when multiple-objects-per-synchronizer is implemented.

	for link in self.subscribed_links.all():
	outer_service_instance = link.provider_service_instance
	# TODO: We may need to invalidate the vOLT too...
	for link in outer_service_instance.subscribed_links.all():
	inner_service_instance = link.provider_service_instance
	inner_service_instance.save(update_fields=["updated"])

	def generate_s_tag(self):

	# unused_s_tags_for_c_tag() this function will return a list of unused s_tags for that c_tag

	tag = random.choice(self.unused_s_tags_for_c_tag())

	# Check that combination(c_tag,s_tag) is unique.
	# If the combination is not unique it will keep on calling this function recursively till it gets a unique combination.

	self.s_tag = tag
	if None != self.get_used_s_c_tag_subscriber_id():
	return self.generate_s_tag()
	else:
	return tag

	def generate_c_tag(self):

	# unused_c_tags_for_s_tag() this function will return a list of unused c_tags for the given s_tag

	tag = random.choice(self.unused_c_tags_for_s_tag())

	# Check that this random generated value is valid across given ONU-first check.
	# If the value is valid it will assign c_tag wth it and do second check.
	# If the value is not valid below function is recursively called till it gets a unique value.

	if tag in self.get_used_c_tags():
	return self.generate_c_tag()
	else:
	self.c_tag = tag

	# Scenario if we don't have a s_tag.
	# Second check-verify that combination is unique across.

	if not self.s_tag:
	self.s_tag = self.generate_s_tag()
	return tag
	elif None != self.get_used_s_c_tag_subscriber_id():
	return self.generate_c_tag()
	else:
	return tag

	def unused_c_tags_for_s_tag(self):

	#This function will return a list of unused c_tags

	#If there is no s_tag
	global range_of_tags

	#If there's a s_tag, then return unused c_tags for that s_tag
	subscribers_with_same_s_tag = RCORDSubscriber.objects.filter(s_tag = self.s_tag)
	used_c_tags = [s.c_tag for s in subscribers_with_same_s_tag]
	if len(used_c_tags) == 0:
	return range_of_tags
	else:
	list_of_unused_c_tags_for_s_tag = list(set(range_of_tags) - set(used_c_tags))
	if len(list_of_unused_c_tags_for_s_tag) == 0:
	raise XOSConfigurationError("All the c_tags are exhausted for this s_tag: %s"% self.s_tag)
	else:
	return list_of_unused_c_tags_for_s_tag

	def unused_s_tags_for_c_tag(self):

	#This function will return a list of unused s_tags

	global range_of_tags
	#If there's a c_tag, then return unused s_tags for that c_tag
	subscribers_with_same_c_tag = RCORDSubscriber.objects.filter(c_tag = self.c_tag)
	used_s_tags = [s.s_tag for s in subscribers_with_same_c_tag]
	if len(used_s_tags) == 0:
	return range_of_tags
	else:
	list_of_unused_s_tags_for_c_tag = list(set(range_of_tags) - set(used_s_tags))
	if len(list_of_unused_s_tags_for_c_tag) == 0:
	raise XOSConfigurationError("All the s_tags are exhausted for this c_tag: %s"% self.c_tag)
	else:
	return list_of_unused_s_tags_for_c_tag
	def get_same_onu_subscribers(self):
	return RCORDSubscriber.objects.filter(onu_device=self.onu_device)

	def get_same_s_c_tag_subscribers(self):
	return RCORDSubscriber.objects.filter(c_tag=self.c_tag, s_tag=self.s_tag)

	def get_used_c_tags(self):
	same_onu_subscribers = self.get_same_onu_subscribers()
	same_onu_subscribers = [s for s in same_onu_subscribers if s.id != self.id]
	used_tags = [s.c_tag for s in same_onu_subscribers]
	return used_tags

	def get_used_s_c_tag_subscriber_id(self):
	# Function to check c_tag and s_tag combination are unique across.
	same_s_c_tag_subscribers = self.get_same_s_c_tag_subscribers()
	same_s_c_tag_subscribers = [s for s in same_s_c_tag_subscribers if s.id != self.id]
	if len(same_s_c_tag_subscribers) > 0:
	return same_s_c_tag_subscribers[0].id
	else:
	return None

	def validate_tech_profile_id(self):
	if self.owner.leaf_model.access != "voltha":
	# if we're not using VOLTHA we don't need to validate this
	return True

	volt = None
	for ps in self.owner.provider_services:
	provider_service = ps.leaf_model
	if provider_service.name.lower() == "volt":
	volt = provider_service

	technology = volt.get_olt_technology_from_unu_sn(self.onu_device)

	try:
	tp = volt.get_tech_profile(technology, self.tech_profile_id)
	return True
	except ObjectDoesNotExist:
	return False


	def save(self, args, *kwargs):
	self.validate_unique_service_specific_id(none_okay=True)

	# VSGServiceInstance will extract the creator from the Subscriber, as it needs a creator to create its
	# Instance.
	if not self.creator:
	# If we weren't passed an explicit creator, then we will assume the caller is the creator.
	if not getattr(self, "caller", None):
	raise XOSProgrammingError("RCORDSubscriber's self.caller was not set")
	self.creator = self.caller

	# validate MAC Address
	if hasattr(self, 'mac_address') and self.mac_address:
	if not re.match("[0-9a-f]{2}([-:]?)[0-9a-f]{2}(\\1[0-9a-f]{2}){4}$", self.mac_address.lower()):
	raise XOSValidationError("The MAC address specified is not valid: %s" % self.mac_address)

	# validate c_tag
	if self.c_tag:
	is_update_with_same_tag = False

	if not self.is_new:
	# if it is an update, but the tag is the same, skip validation
	existing = RCORDSubscriber.objects.filter(id=self.id)

	if len(existing) > 0 and existing[0].c_tag == self.c_tag and existing[0].id == self.id:
	is_update_with_same_tag = True

	if self.c_tag in self.get_used_c_tags() and not is_update_with_same_tag:
	raise XOSValidationError(
	"The c_tag you specified (%s) has already been used on device %s" %
	(self.c_tag, self.onu_device))

	# validate s_tag and c_tag combination
	if self.c_tag and self.s_tag:
	is_update_with_same_tag = False

	if not self.is_new:
	# if it is an update, but the tags are the same, skip validation
	existing = RCORDSubscriber.objects.filter(id=self.id)
	if len(existing) > 0 and existing[0].c_tag == self.c_tag and existing[0].s_tag == self.s_tag and existing[0].id == self.id:
	is_update_with_same_tag = True

	id = self.get_used_s_c_tag_subscriber_id()
	if None != id and not is_update_with_same_tag:
	raise XOSValidationError("The c_tag(%s) and s_tag(%s) pair you specified,has already been used by Subscriber with Id (%s)" % (self.c_tag,self.s_tag,id))


	if not self.c_tag:
	self.c_tag = self.generate_c_tag()

	elif not self.s_tag:
	self.s_tag = self.generate_s_tag()

	self.set_owner()

	if self.status != "pre-provisioned" and \
	hasattr(self.owner.leaf_model, "access") and \
	self.owner.leaf_model.access == "voltha" and \
	not self.deleted:

	# if the access network is managed by voltha, validate that onu_device actually exist
	# we assume RCORDService is connected only to the vOLTService
	volt_service = self.owner.provider_services[0].leaf_model

	if not volt_service.has_access_device(self.onu_device):
	raise XOSValidationError("The onu_device you specified (%s) does not exists" % self.onu_device)

	# if the access network is managed by voltha, validate that the tech_profile_id actually exists
	if not self.validate_tech_profile_id():
	raise XOSValidationError("The technology profile you specified [%s] does not exist" % self.tech_profile_id)

	super(RCORDSubscriber, self).save(args, *kwargs)
	self.invalidate_related_objects()
	return