Add negative caching with dotted cnames test

diff --git a/regression-tests.nobackend/negcache-tests-dotted-cname/command b/regression-tests.nobackend/negcache-tests-dotted-cname/command
new file mode 100755 (executable)
index 0000000..ea8ac11
--- /dev/null
+++ b/regression-tests.nobackend/negcache-tests-dotted-cname/command
@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+set -e
+set -x
+
+port=5501
+rm -f pdns*.pid
+
+$PDNS --daemon=no --local-port=$port --socket-dir=./          \
+       --no-shuffle --launch=bind,pipe --bind-config=negcache-tests-dotted-cname/named.conf   \
+       --pipe-command=negcache-tests-dotted-cname/pipe.py \
+       --send-root-referral --cache-ttl=60 --no-config --module-dir=../regression-tests/modules &
+
+sleep 3
+
+$SDIG 127.0.0.1 5501 cname.example2.com A | LC_ALL=C sort
+
+# check if we didn't neg-cache .com
+$SDIG 127.0.0.1 5501 www.example.com A | LC_ALL=C sort
+
+kill $(cat pdns*.pid)
+rm pdns*.pid

diff --git a/regression-tests.nobackend/negcache-tests-dotted-cname/description b/regression-tests.nobackend/negcache-tests-dotted-cname/description
new file mode 100644 (file)
index 0000000..353c8b7
--- /dev/null
+++ b/regression-tests.nobackend/negcache-tests-dotted-cname/description
@@ -0,0 +1,5 @@
+This test the correct workings of DNSName in combination with negative caching.
+In the pre-DNSName era, it was possible for a pipe-backend to return a CNAME
+with a dot on the end. When trying to look up the target of the CNAME, PowerDNS
+would negatively cache _all_ names down to that name (i.e. ., com., powerdns.
+for www.powerdns.com) and send out wrong answers for all domains after that.

diff --git a/regression-tests.nobackend/negcache-tests-dotted-cname/example.com.zone b/regression-tests.nobackend/negcache-tests-dotted-cname/example.com.zone
new file mode 100644 (file)
index 0000000..8dfa2f6
--- /dev/null
+++ b/regression-tests.nobackend/negcache-tests-dotted-cname/example.com.zone
@@ -0,0 +1,14 @@
+$TTL 120
+$ORIGIN example.com.
+@      100000  IN      SOA     ns1.example.com.        ahu.example.com. (
+                       2000081501
+                       8H ; refresh
+                       2H ; retry
+                       1W ; expire
+                       1D ; default_ttl
+                       )
+
+@                      IN      NS      ns1.example.com.
+@                      IN      NS      ns2.example.com.
+
+www            IN      A       127.0.0.1

diff --git a/regression-tests.nobackend/negcache-tests-dotted-cname/expected_result b/regression-tests.nobackend/negcache-tests-dotted-cname/expected_result
new file mode 100644 (file)
index 0000000..b0a962a
--- /dev/null
+++ b/regression-tests.nobackend/negcache-tests-dotted-cname/expected_result
@@ -0,0 +1,7 @@
+0      cname.example2.com.     IN      CNAME   3600    www.example.com.
+0      www.example.com.        IN      A       120     127.0.0.1
+Rcode: 0 (No Error), RD: 0, QR: 1, TC: 0, AA: 1, opcode: 0
+Reply to question for qname='cname.example2.com.', qtype=A
+0      www.example.com.        IN      A       120     127.0.0.1
+Rcode: 0 (No Error), RD: 0, QR: 1, TC: 0, AA: 1, opcode: 0
+Reply to question for qname='www.example.com.', qtype=A

diff --git a/regression-tests.nobackend/negcache-tests-dotted-cname/named.conf b/regression-tests.nobackend/negcache-tests-dotted-cname/named.conf
new file mode 100644 (file)
index 0000000..da86337
--- /dev/null
+++ b/regression-tests.nobackend/negcache-tests-dotted-cname/named.conf
@@ -0,0 +1,9 @@
+options {
+       directory "negcache-tests-dotted-cname";
+       version "Meow!Meow!";
+};
+
+zone "example.com" {
+  type master;
+  file "example.com.zone";
+};

diff --git a/regression-tests.nobackend/negcache-tests-dotted-cname/pipe.py b/regression-tests.nobackend/negcache-tests-dotted-cname/pipe.py
new file mode 100755 (executable)
index 0000000..c12cdd4
--- /dev/null
+++ b/regression-tests.nobackend/negcache-tests-dotted-cname/pipe.py
@@ -0,0 +1,32 @@
+#!/usr/bin/python2 -u
+
+import sys
+
+line = sys.stdin.readline()
+# TOLO
+print 'OK\tTest backend firing up'
+
+while True:
+    line = sys.stdin.readline()
+    items = line.split('\t')
+    sys.stderr.write(line)
+    if len(items) < 6:
+        print 'LOG\tGot an unparsable line'
+        print 'LOG\t%s' % line
+        print 'END'
+        continue
+
+    what, qname, qclass, qtype, id, ip = items
+
+    if qtype in ['SOA', 'ANY'] and qname == 'example2.com':
+        print 'DATA\t%s\t%s\tSOA\t300\t-1\tns1.example.com ahu.example.com 2008080300 1800 3600 604800 3600' % (qname, qclass)
+
+    if qtype in ['NS', 'ANY'] and qname == 'example2.com':
+        print 'DATA\t%s\t%s\tNS\t3600\t-1\tns1.example.com' % (qname, qclass)
+        print 'DATA\t%s\t%s\tNS\t3600\t-1\tns2.example.com' % (qname, qclass)
+
+    if qtype in ['A', 'ANY'] and qname.endswith('example2.com'):
+        # We were asked a specific record
+        print 'DATA\t%s\t%s\tCNAME\t3600\t-1\twww.example.com.' % (qname, qclass)
+
+    print 'END'