100 lines
3 KiB
Python
100 lines
3 KiB
Python
import base64
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from django.contrib.auth import get_user_model
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from django.utils.translation import gettext_lazy as _
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from rest_framework import serializers
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from .models import *
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class VPNPoolSerializer(serializers.ModelSerializer):
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class Meta:
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model = VPNPool
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fields = '__all__'
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class VPNNetworkReservationSerializer(serializers.ModelSerializer):
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class Meta:
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model = VPNNetworkReservation
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fields = '__all__'
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class VPNNetworkSerializer(serializers.ModelSerializer):
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class Meta:
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model = VPNNetwork
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fields = '__all__'
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# This is required for finding the VPN pool, but does not
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# exist in the model
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network_size = serializers.IntegerField(min_value=0,
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max_value=128,
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write_only=True)
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def validate_wireguard_public_key(self, value):
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msg = _("Supplied key is not a valid wireguard public key")
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""" FIXME: verify that this does not create broken wireguard config files,
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i.e. contains \n or similar!
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We might even need to be more strict to not break wireguard...
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"""
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try:
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base64.standard_b64decode(value)
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except Exception as e:
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raise serializers.ValidationError(msg)
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if '\n' in value:
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raise serializers.ValidationError(msg)
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return value
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def validate(self, data):
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# FIXME: filter for status = active or similar
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all_pools = VPNPool.objects.all()
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sizes = [ p.subnetwork_size for p in all_pools ]
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pools = VPNPool.objects.filter(subnetwork_size=data['network_size'])
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if len(pools) == 0:
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msg = _("No pool available for networks with size = {}. Available are: {}".format(data['network_size'], sizes))
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raise serializers.ValidationError(msg)
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return data
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def create(self, validated_data):
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"""
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Creating a new vpnnetwork - there are a couple of race conditions,
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especially when run in parallel.
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What we should be doing:
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- create a reservation race free
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- map the reservation to a network (?)
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"""
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pools = VPNPool.objects.filter(subnetwork_size=validated_data['network_size'])
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vpn_network = None
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for pool in pools:
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if pool.num_free_networks > 0:
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next_address = pool.next_free_network
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reservation, created = VPNNetworkReservation.objects.update_or_create(
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vpnpool=pool, address=next_address,
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defaults = {
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'status': 'used'
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})
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vpn_network = VPNNetwork.objects.create(
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owner=self.context['request'].user,
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network=reservation,
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wireguard_public_key=validated_data['wireguard_public_key']
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)
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break
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if not vpn_network:
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# FIXME: use correct exception
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raise Exception("Did not find any free pool")
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return vpn_network
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