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
160
161
|
package file
import (
"sort"
"strings"
"testing"
"github.com/miekg/coredns/middleware/pkg/dnsrecorder"
"github.com/miekg/coredns/middleware/proxy"
"github.com/miekg/coredns/middleware/test"
"github.com/miekg/dns"
"golang.org/x/net/context"
)
func TestLookupCNAMEChain(t *testing.T) {
name := "example.org."
zone, err := Parse(strings.NewReader(dbExampleCNAME), name, "stdin")
if err != nil {
t.Fatalf("Expected no error when reading zone, got %q", err)
}
fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{name: zone}, Names: []string{name}}}
ctx := context.TODO()
for _, tc := range cnameTestCases {
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)
}
}
}
var cnameTestCases = []test.Case{
{
Qname: "a.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("a.example.org. 1800 IN A 127.0.0.1"),
},
},
{
Qname: "www3.example.org.", Qtype: dns.TypeCNAME,
Answer: []dns.RR{
test.CNAME("www3.example.org. 1800 IN CNAME www2.example.org."),
},
},
{
Qname: "dangling.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.CNAME("dangling.example.org. 1800 IN CNAME foo.example.org."),
},
},
{
Qname: "www3.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("a.example.org. 1800 IN A 127.0.0.1"),
test.CNAME("www.example.org. 1800 IN CNAME a.example.org."),
test.CNAME("www1.example.org. 1800 IN CNAME www.example.org."),
test.CNAME("www2.example.org. 1800 IN CNAME www1.example.org."),
test.CNAME("www3.example.org. 1800 IN CNAME www2.example.org."),
},
},
}
func TestLookupCNAMEExternal(t *testing.T) {
name := "example.org."
zone, err := Parse(strings.NewReader(dbExampleCNAME), name, "stdin")
if err != nil {
t.Fatalf("Expected no error when reading zone, got %q", err)
}
zone.Proxy = proxy.NewLookup([]string{"8.8.8.8:53"}) // TODO(miek): point to local instance
fm := File{Next: test.ErrorHandler(), Zones: Zones{Z: map[string]*Zone{name: zone}, Names: []string{name}}}
ctx := context.TODO()
for _, tc := range exernalTestCases {
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)
}
}
}
var exernalTestCases = []test.Case{
{
Qname: "external.example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.CNAME("external.example.org. 1800 CNAME www.example.net."),
// magic 303 TTL that says: don't check TTL.
test.A("www.example.net. 303 IN A 93.184.216.34"),
},
},
}
const dbExampleCNAME = `
$TTL 30M
$ORIGIN example.org.
@ IN SOA linode.atoom.net. miek.miek.nl. (
1282630057 ; Serial
4H ; Refresh
1H ; Retry
7D ; Expire
4H ) ; Negative Cache TTL
a IN A 127.0.0.1
www3 IN CNAME www2
www2 IN CNAME www1
www1 IN CNAME www
www IN CNAME a
dangling IN CNAME foo
external IN CNAME www.example.net.`
|
