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
|
package test
import (
"testing"
"github.com/miekg/dns"
)
func TestTemplateUpstream(t *testing.T) {
corefile := `.:0 {
# CNAME
template IN ANY cname.example.net. {
match ".*"
answer "cname.example.net. 60 IN CNAME target.example.net."
upstream
}
# Target
template IN A target.example.net. {
match ".*"
answer "target.example.net. 60 IN A 1.2.3.4"
}
}
`
i, udp, _, err := CoreDNSServerAndPorts(corefile)
if err != nil {
t.Fatalf("Could not get CoreDNS serving instance: %s", err)
}
defer i.Stop()
// Test that an A query returns a CNAME and an A record
m := new(dns.Msg)
m.SetQuestion("cname.example.net.", dns.TypeA)
m.SetEdns0(4096, true) // need this?
r, err := dns.Exchange(m, udp)
if err != nil {
t.Fatalf("Could not send msg: %s", err)
}
if r.Rcode == dns.RcodeServerFailure {
t.Fatalf("Rcode should not be dns.RcodeServerFailure")
}
if len(r.Answer) < 2 {
t.Fatalf("Expected 2 answers, got %v", len(r.Answer))
}
if x := r.Answer[0].(*dns.CNAME).Target; x != "target.example.net." {
t.Fatalf("Failed to get address for CNAME, expected target.example.net. got %s", x)
}
if x := r.Answer[1].(*dns.A).A.String(); x != "1.2.3.4" {
t.Fatalf("Failed to get address for CNAME, expected 1.2.3.4 got %s", x)
}
// Test that a CNAME query only returns a CNAME
m = new(dns.Msg)
m.SetQuestion("cname.example.net.", dns.TypeCNAME)
m.SetEdns0(4096, true) // need this?
r, err = dns.Exchange(m, udp)
if err != nil {
t.Fatalf("Could not send msg: %s", err)
}
if r.Rcode == dns.RcodeServerFailure {
t.Fatalf("Rcode should not be dns.RcodeServerFailure")
}
if len(r.Answer) < 1 {
t.Fatalf("Expected 1 answer, got %v", len(r.Answer))
}
if x := r.Answer[0].(*dns.CNAME).Target; x != "target.example.net." {
t.Fatalf("Failed to get address for CNAME, expected target.example.net. got %s", x)
}
}
|
