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package dnstap
import (
"context"
"net"
"testing"
"github.com/coredns/coredns/plugin/dnstap/msg"
"github.com/coredns/coredns/plugin/metadata"
test "github.com/coredns/coredns/plugin/test"
tap "github.com/dnstap/golang-dnstap"
"github.com/miekg/dns"
)
func testCase(t *testing.T, tapq, tapr *tap.Dnstap, q, r *dns.Msg, extraFormat string) {
w := writer{t: t}
w.queue = append(w.queue, tapq, tapr)
h := Dnstap{
Next: test.HandlerFunc(func(_ context.Context,
w dns.ResponseWriter, _ *dns.Msg) (int, error) {
return 0, w.WriteMsg(r)
}),
io: &w,
ExtraFormat: extraFormat,
}
ctx := metadata.ContextWithMetadata(context.TODO())
ok := metadata.SetValueFunc(ctx, "metadata/test", func() string {
return "MetadataValue"
})
if !ok {
t.Fatal("Failed to set metadata")
}
_, err := h.ServeDNS(ctx, &test.ResponseWriter{}, q)
if err != nil {
t.Fatal(err)
}
}
type writer struct {
t *testing.T
queue []*tap.Dnstap
}
func (w *writer) Dnstap(e *tap.Dnstap) {
if len(w.queue) == 0 {
w.t.Error("Message not expected")
}
ex := w.queue[0].Message
got := e.Message
if string(ex.QueryAddress) != string(got.QueryAddress) {
w.t.Errorf("Expected source address %s, got %s", ex.QueryAddress, got.QueryAddress)
}
if string(ex.ResponseAddress) != string(got.ResponseAddress) {
w.t.Errorf("Expected response address %s, got %s", ex.ResponseAddress, got.ResponseAddress)
}
if *ex.QueryPort != *got.QueryPort {
w.t.Errorf("Expected port %d, got %d", *ex.QueryPort, *got.QueryPort)
}
if *ex.SocketFamily != *got.SocketFamily {
w.t.Errorf("Expected socket family %d, got %d", *ex.SocketFamily, *got.SocketFamily)
}
if string(w.queue[0].Extra) != string(e.Extra) {
w.t.Errorf("Expected extra %s, got %s", w.queue[0].Extra, e.Extra)
}
w.queue = w.queue[1:]
}
func TestDnstap(t *testing.T) {
q := test.Case{Qname: "example.org", Qtype: dns.TypeA}.Msg()
r := test.Case{
Qname: "example.org.", Qtype: dns.TypeA,
Answer: []dns.RR{
test.A("example.org. 3600 IN A 10.0.0.1"),
},
}.Msg()
tapq := &tap.Dnstap{
Message: testMessage(),
}
msg.SetType(tapq.Message, tap.Message_CLIENT_QUERY)
tapr := &tap.Dnstap{
Message: testMessage(),
}
msg.SetType(tapr.Message, tap.Message_CLIENT_RESPONSE)
testCase(t, tapq, tapr, q, r, "")
tapq_with_extra := &tap.Dnstap{
Message: testMessage(), // leave type unset for deepEqual
Extra: []byte("extra_field_MetadataValue_A_example.org._IN_udp_29_10.240.0.1_40212_127.0.0.1"),
}
msg.SetType(tapq_with_extra.Message, tap.Message_CLIENT_QUERY)
tapr_with_extra := &tap.Dnstap{
Message: testMessage(),
Extra: []byte("extra_field_MetadataValue_A_example.org._IN_udp_29_10.240.0.1_40212_127.0.0.1"),
}
msg.SetType(tapr_with_extra.Message, tap.Message_CLIENT_RESPONSE)
extraFormat := "extra_field_{/metadata/test}_{type}_{name}_{class}_{proto}_{size}_{remote}_{port}_{local}"
testCase(t, tapq_with_extra, tapr_with_extra, q, r, extraFormat)
}
func testMessage() *tap.Message {
inet := tap.SocketFamily_INET
udp := tap.SocketProtocol_UDP
port := uint32(40212)
return &tap.Message{
SocketFamily: &inet,
SocketProtocol: &udp,
QueryAddress: net.ParseIP("10.240.0.1"),
QueryPort: &port,
}
}
func TestTapMessage(t *testing.T) {
extraFormat := "extra_field_no_replacement_{/metadata/test}_{type}_{name}_{class}_{proto}_{size}_{remote}_{port}_{local}"
tapq := &tap.Dnstap{
Message: testMessage(),
// extra field would not be replaced, since TapMessage won't pass context
Extra: []byte(extraFormat),
}
msg.SetType(tapq.Message, tap.Message_CLIENT_QUERY)
w := writer{t: t}
w.queue = append(w.queue, tapq)
h := Dnstap{
Next: test.HandlerFunc(func(_ context.Context,
w dns.ResponseWriter, r *dns.Msg) (int, error) {
return 0, w.WriteMsg(r)
}),
io: &w,
ExtraFormat: extraFormat,
}
h.TapMessage(tapq.Message)
}
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