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tests_expiredglue.py revision 1.1.1.1 
      1 # Copyright (C) Internet Systems Consortium, Inc. ("ISC")
      2 #
      3 # SPDX-License-Identifier: MPL-2.0
      4 #
      5 # This Source Code Form is subject to the terms of the Mozilla Public
      6 # License, v. 2.0.  If a copy of the MPL was not distributed with this
      7 # file, you can obtain one at https://mozilla.org/MPL/2.0/.
      8 #
      9 # See the COPYRIGHT file distributed with this work for additional
     10 # information regarding copyright ownership.
     11 
     12 import time
     13 
     14 import isctest
     15 
     16 
     17 def test_expiredglue(ns4):
     18     msg1 = isctest.query.create("a.example.tld.", "A")
     19     res1 = isctest.query.udp(msg1, ns4.ip)
     20     isctest.check.noerror(res1)
     21     isctest.check.rr_count_eq(res1.answer, 1)
     22 
     23     msg2 = isctest.query.create("a.dnshoster.tld.", "A")
     24     res2 = isctest.query.udp(msg2, ns4.ip)
     25     isctest.check.rr_count_eq(res2.answer, 1)
     26 
     27     msg3 = isctest.query.create("ns.dnshoster.tld.", "A")
     28     res3 = isctest.query.udp(msg3, ns4.ip)
     29     isctest.check.rr_count_eq(res3.answer, 1)
     30 
     31     time.sleep(3)
     32 
     33     # Even if the glue is expired but the delegation is not, named
     34     # is able to "recover" by looking up the hints again and does
     35     # not bails out with a fetch loop detection.
     36     res1_2 = isctest.query.udp(msg1, ns4.ip)
     37     isctest.check.same_data(res1_2, res1)
     38 
     39     time.sleep(3)
     40     res2_2 = isctest.query.udp(msg2, ns4.ip)
     41     isctest.check.same_data(res2_2, res2)
     42 
     43     time.sleep(3)
     44     res3_2 = isctest.query.udp(msg3, ns4.ip)
     45     isctest.check.same_data(res3_2, res3)
     46 
     47 
     48 def test_loopdetected(ns4):
     49     msg = isctest.query.create("a.missing.tld.", "A")
     50     with ns4.watch_log_from_here() as watcher:
     51         res = isctest.query.udp(msg, ns4.ip)
     52 
     53         # However, this is a valid fetch loop, and named detects it.
     54         watcher.wait_for_line("loop detected resolving 'ns.missing.tld/A'")
     55         isctest.check.servfail(res)
     56