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from typing import cast
import dns.btreezone
import dns.rdataset
import dns.zone
Node = dns.btreezone.Node
simple_zone = """
$ORIGIN example.
$TTL 300
@ soa foo bar 1 2 3 4 5
@ ns ns1
@ ns ns2
ns1 a 10.0.0.1
ns2 a 10.0.0.2
a txt "a"
c.b.a txt "cba"
b txt "b"
sub ns ns1.sub
sub ns ns2.sub
ns1.sub a 10.0.0.3
ns2.sub a 10.0.0.4
ns1.sub2 a 10.0.0.5
ns2.sub2 a 10.0.0.6
text txt "here to be after sub2"
z txt "z"
"""
def make_example(text: str, relativize: bool = False) -> dns.btreezone.Zone:
z = dns.zone.from_text(
simple_zone, "example.", relativize=relativize, zone_factory=dns.btreezone.Zone
)
return cast(dns.btreezone.Zone, z)
def do_test_node_flags(relativize: bool):
z = make_example(simple_zone, relativize)
n = cast(Node, z.get_node("@"))
assert not n.is_delegation()
assert not n.is_glue()
assert n.is_origin()
assert n.is_origin_or_glue()
assert n.is_immutable()
n = cast(Node, z.get_node("sub"))
assert n.is_delegation()
assert not n.is_glue()
assert not n.is_origin()
assert not n.is_origin_or_glue()
n = cast(Node, z.get_node("ns1.sub"))
assert not n.is_delegation()
assert n.is_glue()
assert not n.is_origin()
assert n.is_origin_or_glue()
def test_node_flags_absolute():
do_test_node_flags(False)
def test_node_flags_relative():
do_test_node_flags(True)
def test_flags_in_constructor():
n = Node()
assert n.flags == 0
n = Node(dns.btreezone.NodeFlags.ORIGIN)
assert n.is_origin()
def do_test_obscure_and_expose(relativize: bool):
z = make_example(simple_zone, relativize=relativize)
n = cast(Node, z.get_node("ns1.sub2"))
assert not n.is_delegation()
assert not n.is_glue()
assert not n.is_origin()
assert not n.is_origin_or_glue()
sub2_name = z._validate_name("sub2")
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
assert sub2_name not in version.delegations
rds = dns.rdataset.from_text("in", "ns", 300, "ns1.sub2", "ns2.sub2")
with z.writer() as txn:
txn.replace("sub2", rds)
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
assert sub2_name in version.delegations
n = cast(Node, z.get_node("ns1.sub2"))
assert not n.is_delegation()
assert n.is_glue()
assert not n.is_origin()
assert n.is_origin_or_glue()
with z.writer() as txn:
txn.delete("sub2")
txn.delete("ns2.sub2") # for other coverage purposes!
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
assert sub2_name not in version.delegations
n = cast(Node, z.get_node("ns1.sub2"))
assert not n.is_delegation()
assert not n.is_glue()
assert not n.is_origin()
assert not n.is_origin_or_glue()
# repeat but delete just the rdataset
rds = dns.rdataset.from_text("in", "ns", 300, "ns1.sub2", "ns2.sub2")
with z.writer() as txn:
txn.replace("sub2", rds)
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
assert sub2_name in version.delegations
n = cast(Node, z.get_node("ns1.sub2"))
assert not n.is_delegation()
assert n.is_glue()
assert not n.is_origin()
assert n.is_origin_or_glue()
with z.writer() as txn:
txn.delete("sub2", "NS")
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
assert sub2_name not in version.delegations
n = cast(Node, z.get_node("ns1.sub2"))
assert not n.is_delegation()
assert not n.is_glue()
assert not n.is_origin()
assert not n.is_origin_or_glue()
def test_obscure_and_expose_absolute():
do_test_obscure_and_expose(False)
def test_obscure_and_expose_relative():
do_test_obscure_and_expose(True)
def do_test_delegations(relativize: bool):
z = make_example(simple_zone, relativize=relativize)
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
name = z._validate_name("a.b.c.sub.example.")
delegation, is_glue = version.delegations.get_delegation(name)
assert delegation == z._validate_name("sub.example.")
assert is_glue
assert version.delegations.is_glue(name)
name = z._validate_name("sub.example.")
delegation, is_glue = version.delegations.get_delegation(name)
assert delegation == z._validate_name("sub.example.")
assert not is_glue
assert not version.delegations.is_glue(name)
name = z._validate_name("text.example.")
delegation, is_glue = version.delegations.get_delegation(name)
assert delegation is None
assert not is_glue
assert not version.delegations.is_glue(name)
def test_delegations_absolute():
do_test_delegations(False)
def test_delegations_relative():
do_test_delegations(True)
def do_test_bounds(relativize: bool):
z = make_example(simple_zone, relativize=relativize)
with z.reader() as txn:
version = cast(dns.btreezone.ImmutableVersion, txn.version)
# tuple is (name, left, right, closest, is_equal, is_delegation)
tests = [
("example.", "example.", "a.example.", "example.", True, False),
("a.z.example.", "z.example.", None, "z.example.", False, False),
(
"a.b.a.example.",
"a.example.",
"c.b.a.example.",
"b.a.example.",
False,
False,
),
(
"d.b.a.example.",
"c.b.a.example.",
"b.example.",
"b.a.example.",
False,
False,
),
(
"d.c.b.a.example.",
"c.b.a.example.",
"b.example.",
"c.b.a.example.",
False,
False,
),
(
"sub.example.",
"sub.example.",
"ns1.sub2.example.",
"sub.example.",
True,
True,
),
(
"ns1.sub.example.",
"sub.example.",
"ns1.sub2.example.",
"sub.example.",
False,
True,
),
]
for name, left, right, closest, is_equal, is_delegation in tests:
name = z._validate_name(name)
left = z._validate_name(left)
if right is not None:
right = z._validate_name(right)
closest = z._validate_name(closest)
bounds = version.bounds(name)
print(bounds)
assert bounds.left == left
assert bounds.right == right
assert bounds.closest_encloser == closest
assert bounds.is_equal == is_equal
assert bounds.is_delegation == is_delegation
def test_bounds_absolute():
do_test_bounds(False)
def test_bounds_relative():
do_test_bounds(True)
|
