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"""Postgres network address functions.
https://www.postgresql.org/docs/11/functions-net.html
"""
from django.db.models import BooleanField, Func, IntegerField, TextField
from .fields import CidrAddressField, InetAddressField, MACAddress8Field
class Abbrev(Func):
"""Function to abbreviate field as text."""
arity = 1
function = 'ABBREV'
output_field = TextField()
class Broadcast(Func):
"""Function to extract broadcast address for network."""
arity = 1
function = 'BROADCAST'
output_field = InetAddressField()
class Family(Func):
"""Function to extract family of address; 4 for IPv4, 6 for IPv6."""
arity = 1
function = 'FAMILY'
output_field = IntegerField()
class Host(Func):
"""Function to extract IP address as text."""
arity = 1
function = 'HOST'
output_field = TextField()
class Hostmask(Func):
"""Function to construct host mask for network."""
arity = 1
function = 'HOSTMASK'
output_field = InetAddressField()
class Masklen(Func):
"""Function to extract netmask length."""
arity = 1
function = 'MASKLEN'
output_field = IntegerField()
class Netmask(Func):
"""Function to construct netmask for network."""
arity = 1
function = 'NETMASK'
output_field = InetAddressField()
class Network(Func):
"""Function to extract network part of address."""
arity = 1
function = 'NETWORK'
output_field = CidrAddressField()
class SetMasklen(Func):
"""Function to set netmask length."""
arity = 2
function = 'SET_MASKLEN'
output_field = InetAddressField()
class AsText(Func):
"""Function to extract IP address and netmask length as text."""
arity = 1
function = 'TEXT'
output_field = TextField()
class IsSameFamily(Func):
"""Function to test that addresses are from the same family."""
arity = 2
function = 'INET_SAME_FAMILY'
output_field = BooleanField()
class Merge(Func):
"""Function to calculate the smallest network which includes both of the given
networks.
"""
arity = 2
function = 'INET_MERGE'
output_field = CidrAddressField()
class Trunc(Func):
arity = 1
function = 'TRUNC'
class Macaddr8Set7bit(Func):
"""Function that sets 7th bit to one, also known as modified EUI-64, for inclusion in an IPv6 address"""
arity = 1
function = 'MACADDR8_SET7BIT'
output_field = MACAddress8Field()
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