Synnefo

                      network.type,

# Copyright 2012 GRNET S.A. All rights reserved.

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from optparse import make_option

from django.core.management.base import BaseCommand, CommandError

from synnefo.db.models import Network

from synnefo.api.util import network_specs_from_type

from synnefo.logic.backend import create_network

import ipaddr

NETWORK_TYPES = ['PUBLIC_ROUTED', 'PRIVATE_MAC_FILTERED',

                 'PRIVATE_PHYSICAL_VLAN', 'CUSTOM_ROUTED',

                 'CUSTOM_BRIDGED']

class Command(BaseCommand):

    help = "Create a new network"

    option_list = BaseCommand.option_list + (

        make_option('--name',

            dest='name',

            help="Name of network"),

        make_option('--owner',

            dest='owner',

            help="The owner of the network"),

        make_option('--subnet',

            dest='subnet',

            default=None,

            # required=True,

            help='Subnet of the network'),

        make_option('--gateway',

            dest='gateway',

            default=None,

            help='Gateway of the network'),

        make_option('--dhcp',

            dest='dhcp',

            action='store_true',

            default=False,

            help='Automatically assign IPs'),

        make_option('--public',

            dest='public',

            action='store_true',

            default=False,

            help='Network is public'),

        make_option('--type',

            dest='type',

            default='PRIVATE_MAC_FILTERED',

            choices=NETWORK_TYPES,

            help='Type of network. Choices: ' + ', '.join(NETWORK_TYPES)),

        make_option('--subnet6',

            dest='subnet6',

            default=None,

            help='IPv6 subnet of the network'),

        make_option('--gateway6',

            dest='gateway6',

            default=None,

            help='IPv6 gateway of the network'),

        )

    def handle(self, *args, **options):

        if args:

            raise CommandError("Command doesn't accept any arguments")

        name = options['name']

        subnet = options['subnet']

        if not name:

            raise CommandError("Name is required")

        if not subnet:

            raise CommandError("Subnet is required")

        link, mac_prefix = network_specs_from_type(options['type'])

        subnet, gateway, subnet6, gateway6 = validate_network_info(options)

        if not link:

            raise CommandError("Can not create network. No connectivity link")

        network = Network.objects.create(

                name=name,

                userid=options['owner'],

                subnet=subnet,

                gateway=gateway,

                dhcp=options['dhcp'],

                type=options['type'],

                public=options['public'],

                link=link,

                mac_prefix=mac_prefix,

                gateway6=gateway6,

                subnet6=subnet6,

                state='PENDING')

        create_network(network)

def validate_network_info(options):

    subnet = options['subnet']

    gateway = options['gateway']

    subnet6 = options['subnet6']

    gateway6 = options['gateway6']

    try:

        ipaddr.IPv4Network(subnet)

    except ValueError:

        raise CommandError('Malformed subnet')

    try:

        gateway and ipaddr.IPv4Address(gateway) or None

    except ValueError:

        raise CommandError('Malformed gateway')

    try:

        subnet6 and ipaddr.IPv6Network(subnet6) or None

    except ValueError:

        raise CommandError('Malformed subnet6')

    try:

        gateway6 and ipaddr.IPv6Address(gateway6) or None

    except ValueError:

        raise CommandError('Malformed gateway6')

    return subnet, gateway, subnet6, gateway6

from synnefo.api.faults import (BadRequest, Unauthorized,

                                NetworkInUse)

from synnefo.db.models import Network

    link, mac_prefix = util.network_specs_from_type(type)

    if not link:

        raise Exception("Can not create network. No connectivity link.")

                                ItemNotFound, ServiceUnavailable, Unauthorized,

                                BadMediaType, OverLimit)

                               Network, NetworkInterface, BridgePool,

                               MacPrefixPool, Pool)

def network_specs_from_type(network_type):

    mac_prefix = None

    try:

        if network_type == 'PRIVATE_MAC_FILTERED':

            link = settings.PRIVATE_MAC_FILTERED_BRIDGE

            mac_prefix = MacPrefixPool.get_available().value

        elif network_type == 'PRIVATE_PHYSICAL_VLAN':

            link = BridgePool.get_available().value

        elif network_type == 'CUSTOM_ROUTED':

            link = settings.CUSTOM_ROUTED_ROUTING_TABLE

        elif network_type == 'CUSTOM_BRIDGED':

            link = settings.CUSTOM_BRIDGED_BRIDGE

        else:

            raise BadRequest('Unknown network network_type')

    except Pool.PoolExhausted:

        raise OverLimit('Network count limit exceeded.')

    return link, mac_prefix