Synnefo

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from optparse import make_option

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

from synnefo.management import common

from snf_django.management.utils import parse_bool

from synnefo.management import pprint

from synnefo.logic import subnets

import ipaddr

HELP_MSG = """

Create a new subnet without authenticating the user. The limit of one

IPv4/IPv6 subnet per network still applies. Mandatory fields are CIDR and the

Network ID.

"""

class Command(BaseCommand):

    help = "Create a new Subnet." + HELP_MSG

    option_list = BaseCommand.option_list + (

        make_option("--network-id", dest="network_id",

                    help="Specify the Network to attach the subnet. To get the"

                         " networks of a user, use snf-manage network-list"),

        make_option("--cidr", dest="cidr",

                    help="The CIDR of the subnet, e.g., 192.168.42.0/24"),

        make_option("--allocation-pools", dest="allocation_pools",

                    action="append",

                    help="IP allocation pools to be used for assigning IPs to"

                    " VMs. Can be used multiple times. Syntax: \n"

                    "192.168.42.220,192.168.42.240. Starting IP must proceed "

                    "ending IP."),

        make_option("--name", dest="name",

                    help="An arbitrary string for naming the subnet."),

        make_option("--ip-version", dest="ipversion", choices=["4", "6"],

                    metavar="4|6",

                    help="IP version of the CIDR. The value must be in sync"

                    " with the CIDR. Default value: 4"),

        make_option("--gateway", dest="gateway",

                    help="An IP to use as a gateway for the subnet."

                    " The IP must be inside the CIDR range and cannot be the"

                    " subnet or broadcast IP. If no value is specified, a"

                    " gateway will not be set."),

        make_option("--dhcp", dest="dhcp", default="True",

                    choices=["True", "False"], metavar="True|False",

                    help="Value for DHCP/SLAAC. True by default."),

        make_option("--dns", dest="dns",

                    help="DNS nameservers to be used by the VMs in the subnet."

                    " For the time being, this option isn't supported."),

        make_option("--host-routes", dest="host_routes",

                    help="Host routes to be used for advanced routing"

                    "settings. For the time being, this option isn't"

                    " supported.")

    )

    @common.convert_api_faults

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

        if args:

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

        network_id = options["network_id"]

        cidr = options["cidr"]

        if not network_id:

            raise CommandError("network-id is mandatory")

        if not cidr:

            raise CommandError("cidr is mandatory")

        user_id = common.get_network(network_id).userid

        name = options["name"] or ""

        allocation_pools = options["allocation_pools"]

        ipversion = options["ipversion"] or 4

        ipversion = int(ipversion)

        gateway = options["gateway"]

        dhcp = parse_bool(options["dhcp"])

        dns = options["dns"]

        host_routes = options["host_routes"]

        #Parsing allocation pools

        alloc = list()

        for pool in allocation_pools:

            try:

                start, end = pool.split(',')

                alloc.append([ipaddr.IPv4Address(start),

                              ipaddr.IPv4Address(end)])

            except ValueError:

                raise CommandError("Malformed IPv4 address")

        sub = subnets.create_subnet(name=name,

                                    network_id=network_id,

                                    cidr=cidr,

                                    allocation_pools=sorted(alloc),

                                    gateway=gateway,

                                    ipversion=ipversion,

                                    dhcp=dhcp,

                                    slaac=dhcp,

                                    dns_nameservers=dns,

                                    host_routes=host_routes,

                                    user_id=user_id)

        pprint.pprint_subnet_in_db(sub, stdout=self.stdout)

        self.stdout.write("\n\n")

        pprint.pprint_ippool(sub, stdout=self.stdout)