113 lines
2.6 KiB
Python
113 lines
2.6 KiB
Python
""" Various utils """
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from . import settings
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import uuid
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class NumberedClass:
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""" A class that counts its current instance number """
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next_id = 0
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@classmethod
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def get_id(cls):
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out = cls.next_id
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cls.next_id += 1
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return out
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def __init__(self):
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self.id = self.get_id()
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class LibvirtObject(NumberedClass):
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""" A class that has the basic attributes of a libvirt objects:
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* id
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* uuid
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and the applicable restrictions
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"""
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class TooMany(Exception):
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def __init__(self, count):
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self.count = count
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def __str__(self):
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return (
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"Limit number reached. The current instance #{} does not fit in IPv4"
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).format(self.count)
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def __init__(self, conn):
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super().__init__()
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self.conn = conn
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if self.id > 250:
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raise self.TooMany(self.id)
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self.uuid = uuid.uuid4()
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class MACAddress:
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""" A MAC address for a NIC or bridge """
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def __init__(self, link_id, dev_id):
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""" link_id: id of the current link
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dev_id: id of the current NIC. If the device is a bridge, use None
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"""
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if not dev_id:
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dev_id = 0xFF
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self.link_id = link_id
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self.dev_id = dev_id
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def __str__(self):
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return "52:54:00:{nwid:02x}:{link_id:02x}:{dev_id:02x}".format(
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nwid=settings.NETWORK_ID, link_id=self.link_id, dev_id=self.dev_id
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)
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def __repr__(self):
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return str(self)
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class Addrv4:
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""" An address in IPv4 """
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def __init__(self, link_id, dev_id):
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""" link_id: id of the current link
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dev_id: id of the current NIC. Use None to get the base address
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"""
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if not dev_id:
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dev_id = 0
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self.link_id = link_id
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self.dev_id = dev_id
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self.netmask = "255.255.255.0"
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self.prefix = 24
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def __str__(self):
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return "{base_range}.{link_id}.{dev_id}".format(
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base_range=settings.IPV4_RANGE, link_id=self.link_id, dev_id=self.dev_id
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)
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def __repr__(self):
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return str(self)
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class Addrv6:
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""" An address in IPv6 """
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def __init__(self, link_id, dev_id):
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""" link_id: id of the current link
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dev_id: id of the current NIC. Use None to get the base address
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"""
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if not dev_id:
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dev_id = 0
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self.link_id = link_id
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self.dev_id = dev_id
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self.prefix = 64
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def __str__(self):
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return "{base_range}:{link_id:04x}::{dev_id:04x}".format(
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base_range=settings.IPV6_RANGE, link_id=self.link_id, dev_id=self.dev_id
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)
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