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
|
package bufsize
import (
"context"
"testing"
"github.com/coredns/coredns/plugin"
"github.com/coredns/coredns/plugin/test"
"github.com/coredns/coredns/plugin/whoami"
"github.com/miekg/dns"
)
func TestBufsize(t *testing.T) {
em := Bufsize{
Size: 512,
}
tests := []struct {
next plugin.Handler
qname string
inputBufsize uint16
outgoingBufsize uint16
expectedErr error
}{
// This plugin is responsible for limiting outgoing query's bufize
{
next: whoami.Whoami{},
qname: ".",
inputBufsize: 1200,
outgoingBufsize: 512,
expectedErr: nil,
},
// If EDNS is not enabled, this plugin adds it
{
next: whoami.Whoami{},
qname: ".",
outgoingBufsize: 512,
expectedErr: nil,
},
}
for i, tc := range tests {
req := new(dns.Msg)
req.SetQuestion(dns.Fqdn(tc.qname), dns.TypeA)
req.Question[0].Qclass = dns.ClassINET
em.Next = tc.next
if tc.inputBufsize != 0 {
req.SetEdns0(tc.inputBufsize, false)
}
_, err := em.ServeDNS(context.Background(), &test.ResponseWriter{}, req)
if err != tc.expectedErr {
t.Errorf("Test %d: Expected error is %v, but got %v", i, tc.expectedErr, err)
}
if tc.outgoingBufsize != 0 {
for _, extra := range req.Extra {
if option, ok := extra.(*dns.OPT); ok {
b := option.UDPSize()
if b != tc.outgoingBufsize {
t.Errorf("Test %d: Expected outgoing bufsize is %d, but got %d", i, tc.outgoingBufsize, b)
}
} else {
t.Errorf("Test %d: Not found OPT RR.", i)
}
}
}
}
}
|
