def test_ip_mask_v4(self):
ipv4_masks = [
(0, 0x00000000),
(1, 0x80000000),
(2, 0xc0000000),
(3, 0xe0000000),
(4, 0xf0000000),
(5, 0xf8000000),
(6, 0xfc000000),
(7, 0xfe000000),
(8, 0xff000000),
(9, 0xff800000),
(10, 0xffc00000),
(11, 0xffe00000),
(12, 0xfff00000),
(13, 0xfff80000),
(14, 0xfffc0000),
(15, 0xfffe0000),
(16, 0xffff0000),
(17, 0xffff8000),
(18, 0xffffc000),
(19, 0xffffe000),
(20, 0xfffff000),
(21, 0xfffff800),
(22, 0xfffffc00),
(23, 0xfffffe00),
(24, 0xffffff00),
(25, 0xffffff80),
(26, 0xffffffc0),
(27, 0xffffffe0),
(28, 0xfffffff0),
(29, 0xfffffff8),
(30, 0xfffffffc),
(31, 0xfffffffe),
(32, 0xffffffff),
]
for length, mask_int in ipv4_masks:
self.assertEqual(ip_mask(length, bits=32), mask_int)
with self.assertRaises(ValueError):
ip_mask(-1, bits=32)
ip_mask(33, bits=32)
def test_ip_mask_v6(self):
# See: https://en.wikipedia.org/wiki/IPv6_subnetting_reference
ipv6_masks = [
(12, 0xfff00000000000000000000000000000),
(20, 0xfffff000000000000000000000000000),
(24, 0xffffff00000000000000000000000000),
(28, 0xfffffff0000000000000000000000000),
(32, 0xffffffff000000000000000000000000),
(36, 0xfffffffff00000000000000000000000),
(48, 0xffffffffffff00000000000000000000),
(52, 0xfffffffffffff0000000000000000000),
(56, 0xffffffffffffff000000000000000000),
(60, 0xfffffffffffffff00000000000000000),
(64, 0xffffffffffffffff0000000000000000),
(127, 0xfffffffffffffffffffffffffffffffe),
(128, 0xffffffffffffffffffffffffffffffff),
]
for length, mask_int in ipv6_masks:
self.assertEqual(ip_mask(length, bits=128), mask_int)
with self.assertRaises(ValueError):
ip_mask(-1, bits=128)
ip_mask(129, bits=128)
