1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
package file
import (
"sort"
"strings"
"testing"
"github.com/coredns/coredns/middleware/pkg/dnsrecorder"
"github.com/coredns/coredns/middleware/test"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
// RFC 6672, Section 2.2. Assuming QTYPE != DNAME.
var dnameSubstitutionTestCases = []struct {
qname string
owner string
target string
expected string
}{
{"com.", "example.com.", "example.net.", ""},
{"example.com.", "example.com.", "example.net.", ""},
{"a.example.com.", "example.com.", "example.net.", "a.example.net."},
{"a.b.example.com.", "example.com.", "example.net.", "a.b.example.net."},
{"ab.example.com.", "b.example.com.", "example.net.", ""},
{"foo.example.com.", "example.com.", "example.net.", "foo.example.net."},
{"a.x.example.com.", "x.example.com.", "example.net.", "a.example.net."},
{"a.example.com.", "example.com.", "y.example.net.", "a.y.example.net."},
{"cyc.example.com.", "example.com.", "example.com.", "cyc.example.com."},
{"cyc.example.com.", "example.com.", "c.example.com.", "cyc.c.example.com."},
{"shortloop.x.x.", "x.", ".", "shortloop.x."},
{"shortloop.x.", "x.", ".", "shortloop."},
}
func TestDNAMESubstitution(t *testing.T) {
for i, tc := range dnameSubstitutionTestCases {
result := substituteDNAME(tc.qname, tc.owner, tc.target)
if result != tc.expected {
if result == "" {
result = "<no match>"
}
t.Errorf("Case %d: Expected %s -> %s, got %v", i, tc.qname, tc.expected, result)
return
}
}
}
var dnameTestCases = []test.Case{
{
Qname: "dname.miek.nl.", Qtype: dns.TypeDNAME,
Answer: []dns.RR{
test.DNAME("dname.miek.nl. 1800 IN DNAME test.miek.nl."),
},
Ns: miekAuth,
},
{
Qname: "dname.miek.nl.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("dname.miek.nl. 1800 IN A 127.0.0.1"),
},
Ns: miekAuth,
},
{
Qname: "dname.miek.nl.", Qtype: dns.TypeMX,
Answer: []dns.RR{},
Ns: []dns.RR{
test.SOA("miek.nl. 1800 IN SOA linode.atoom.net. miek.miek.nl. 1282630057 14400 3600 604800 14400"),
},
},
{
Qname: "a.dname.miek.nl.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.CNAME("a.dname.miek.nl. 1800 IN CNAME a.test.miek.nl."),
test.A("a.test.miek.nl. 1800 IN A 139.162.196.78"),
test.DNAME("dname.miek.nl. 1800 IN DNAME test.miek.nl."),
},
Ns: miekAuth,
},
{
Qname: "www.dname.miek.nl.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("a.test.miek.nl. 1800 IN A 139.162.196.78"),
test.DNAME("dname.miek.nl. 1800 IN DNAME test.miek.nl."),
test.CNAME("www.dname.miek.nl. 1800 IN CNAME www.test.miek.nl."),
test.CNAME("www.test.miek.nl. 1800 IN CNAME a.test.miek.nl."),
},
Ns: miekAuth,
},
}
func TestLookupDNAME(t *testing.T) {
zone, err := Parse(strings.NewReader(dbMiekNLDNAME), testzone, "stdin")
if err != nil {
t.Fatalf("Expect no error when reading zone, got %q", err)
}
fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{testzone: zone}, Names: []string{testzone}}}
ctx := context.TODO()
for _, tc := range dnameTestCases {
m := tc.Msg()
rec := dnsrecorder.New(&test.ResponseWriter{})
_, err := fm.ServeDNS(ctx, rec, m)
if err != nil {
t.Errorf("Expected no error, got %v\n", err)
return
}
resp := rec.Msg
sort.Sort(test.RRSet(resp.Answer))
sort.Sort(test.RRSet(resp.Ns))
sort.Sort(test.RRSet(resp.Extra))
if !test.Header(t, tc, resp) {
t.Logf("%v\n", resp)
continue
}
if !test.Section(t, tc, test.Answer, resp.Answer) {
t.Logf("%v\n", resp)
}
if !test.Section(t, tc, test.Ns, resp.Ns) {
t.Logf("%v\n", resp)
}
if !test.Section(t, tc, test.Extra, resp.Extra) {
t.Logf("%v\n", resp)
}
}
}
const dbMiekNLDNAME = `
$TTL 30M
$ORIGIN miek.nl.
@ IN SOA linode.atoom.net. miek.miek.nl. (
1282630057 ; Serial
4H ; Refresh
1H ; Retry
7D ; Expire
4H ) ; Negative Cache TTL
IN NS linode.atoom.net.
IN NS ns-ext.nlnetlabs.nl.
IN NS omval.tednet.nl.
IN NS ext.ns.whyscream.net.
test IN MX 1 aspmx.l.google.com.
IN MX 5 alt1.aspmx.l.google.com.
IN MX 5 alt2.aspmx.l.google.com.
IN MX 10 aspmx2.googlemail.com.
IN MX 10 aspmx3.googlemail.com.
a.test IN A 139.162.196.78
IN AAAA 2a01:7e00::f03c:91ff:fef1:6735
www.test IN CNAME a.test
dname IN DNAME test
dname IN A 127.0.0.1
a.dname IN A 127.0.0.1
`
|
