def in_network(scope, prefixes, destination, default_pfxlen=[24]):
"""
Returns True if the given destination is in the network range that is
defined by the given prefix (e.g. 10.0.0.1/22). If the given prefix
does not have a prefix length specified, the given default prefix length
is applied. If no such prefix length is given, the default length is
/24.
If a list of prefixes is passed, this function returns True only if
the given destination is in ANY of the given prefixes.
:type prefixes: string
:param prefixes: A prefix, or a list of IP prefixes.
:type destination: string
:param destination: An IP address.
:type default_pfxlen: int
:param default_pfxlen: The default prefix length.
:rtype: True
:return: Whether the given destination is in the given network.
"""
needle = ipv4.ip2int(destination[0])
for prefix in prefixes:
network, pfxlen = ipv4.parse_prefix(prefix, default_pfxlen[0])
mask = ipv4.pfxlen2mask_int(pfxlen)
if needle & mask == ipv4.ip2int(network) & mask:
return [True]
return [False]
def in_network(scope, prefixes, destination, default_pfxlen = [24]):
"""
Returns True if the given destination is in the network range that is
defined by the given prefix (e.g. 10.0.0.1/22). If the given prefix
does not have a prefix length specified, the given default prefix length
is applied. If no such prefix length is given, the default length is
/24.
If a list of prefixes is passed, this function returns True only if
the given destination is in ANY of the given prefixes.
@type prefixes: string
@param prefixes: A prefix, or a list of IP prefixes.
@type destination: string
@param destination: An IP address.
@type default_pfxlen: int
@param default_pfxlen: The default prefix length.
@rtype: True
@return: Whether the given destination is in the given network.
"""
needle = ipv4.ip2int(destination[0])
for prefix in prefixes:
network, pfxlen = ipv4.parse_prefix(prefix, default_pfxlen[0])
mask = ipv4.pfxlen2mask_int(pfxlen)
if needle & mask == ipv4.ip2int(network) & mask:
return [True]
return [False]
def testPfxlen2MaskInt(self):
from Exscript.util.ipv4 import pfxlen2mask_int, int2ip
self.assertEqual(int2ip(pfxlen2mask_int(32)), '255.255.255.255')
self.assertEqual(int2ip(pfxlen2mask_int(31)), '255.255.255.254')
self.assertEqual(int2ip(pfxlen2mask_int(30)), '255.255.255.252')
self.assertEqual(int2ip(pfxlen2mask_int(2)), '192.0.0.0')
self.assertEqual(int2ip(pfxlen2mask_int(1)), '128.0.0.0')
self.assertEqual(int2ip(pfxlen2mask_int(0)), '0.0.0.0')
def testPfxlen2MaskInt(self):
from Exscript.util.ipv4 import pfxlen2mask_int, int2ip
self.assertEqual(int2ip(pfxlen2mask_int(32)), '255.255.255.255')
self.assertEqual(int2ip(pfxlen2mask_int(31)), '255.255.255.254')
self.assertEqual(int2ip(pfxlen2mask_int(30)), '255.255.255.252')
self.assertEqual(int2ip(pfxlen2mask_int(2)), '192.0.0.0')
self.assertEqual(int2ip(pfxlen2mask_int(1)), '128.0.0.0')
self.assertEqual(int2ip(pfxlen2mask_int(0)), '0.0.0.0')
def pfxmask(scope, ips, pfxlen):
"""
Applies the given prefix length to the given ips, resulting in a
(list of) IP network addresses.
:type ips: string
:param ips: An IP address, or a list of IP addresses.
:type pfxlen: int
:param pfxlen: An IP prefix length.
:rtype: string
:return: The mask(s) that result(s) from converting the prefix length.
"""
mask = ipv4.pfxlen2mask_int(pfxlen[0])
return [ipv4.int2ip(ipv4.ip2int(ip) & mask) for ip in ips]
def pfxmask(scope, ips, pfxlen):
"""
Applies the given prefix length to the given ips, resulting in a
(list of) IP network addresses.
@type ips: string
@param ips: An IP address, or a list of IP addresses.
@type pfxlen: int
@param pfxlen: An IP prefix length.
@rtype: string
@return: The mask(s) that result(s) from converting the prefix length.
"""
mask = ipv4.pfxlen2mask_int(pfxlen[0])
return [ipv4.int2ip(ipv4.ip2int(ip) & mask) for ip in ips]
