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package request
import (
"fmt"
"testing"
"github.com/coredns/coredns/plugin/test"
"github.com/miekg/dns"
)
func TestRequestDo(t *testing.T) {
st := testRequest()
st.Do()
if st.do == nil {
t.Fatalf("Expected st.do to be set")
}
}
func TestRequestRemote(t *testing.T) {
st := testRequest()
if st.IP() != "10.240.0.1" {
t.Fatalf("Wrong IP from request")
}
p := st.Port()
if p == "" {
t.Fatalf("Failed to get Port from request")
}
if p != "40212" {
t.Fatalf("Wrong port from request")
}
}
func TestRequestMalformed(t *testing.T) {
m := new(dns.Msg)
st := Request{Req: m}
if x := st.QType(); x != 0 {
t.Errorf("Expected 0 Qtype, got %d", x)
}
if x := st.QClass(); x != 0 {
t.Errorf("Expected 0 QClass, got %d", x)
}
if x := st.QName(); x != "." {
t.Errorf("Expected . Qname, got %s", x)
}
if x := st.Name(); x != "." {
t.Errorf("Expected . Name, got %s", x)
}
if x := st.Type(); x != "" {
t.Errorf("Expected empty Type, got %s", x)
}
if x := st.Class(); x != "" {
t.Errorf("Expected empty Class, got %s", x)
}
}
func TestRequestScrubAnswer(t *testing.T) {
m := new(dns.Msg)
m.SetQuestion("large.example.com.", dns.TypeSRV)
req := Request{W: &test.ResponseWriter{}, Req: m}
reply := new(dns.Msg)
reply.SetReply(m)
for i := 1; i < 200; i++ {
reply.Answer = append(reply.Answer, test.SRV(
fmt.Sprintf("large.example.com. 10 IN SRV 0 0 80 10-0-0-%d.default.pod.k8s.example.com.", i)))
}
_, got := req.Scrub(reply)
if want := ScrubAnswer; want != got {
t.Errorf("Want scrub result %d, got %d", want, got)
}
if want, got := req.Size(), reply.Len(); want < got {
t.Errorf("Want scrub to reduce message length below %d bytes, got %d bytes", want, got)
}
if !reply.Truncated {
t.Errorf("Want scrub to set truncated bit")
}
}
func TestRequestScrubExtra(t *testing.T) {
m := new(dns.Msg)
m.SetQuestion("large.example.com.", dns.TypeSRV)
req := Request{W: &test.ResponseWriter{}, Req: m}
reply := new(dns.Msg)
reply.SetReply(m)
for i := 1; i < 200; i++ {
reply.Extra = append(reply.Extra, test.SRV(
fmt.Sprintf("large.example.com. 10 IN SRV 0 0 80 10-0-0-%d.default.pod.k8s.example.com.", i)))
}
_, got := req.Scrub(reply)
if want := ScrubExtra; want != got {
t.Errorf("Want scrub result %d, got %d", want, got)
}
if want, got := req.Size(), reply.Len(); want < got {
t.Errorf("Want scrub to reduce message length below %d bytes, got %d bytes", want, got)
}
if reply.Truncated {
t.Errorf("Want scrub to not set truncated bit")
}
}
func TestRequestScrubExtraEdns0(t *testing.T) {
m := new(dns.Msg)
m.SetQuestion("large.example.com.", dns.TypeSRV)
m.SetEdns0(4096, true)
req := Request{W: &test.ResponseWriter{}, Req: m}
reply := new(dns.Msg)
reply.SetReply(m)
for i := 1; i < 200; i++ {
reply.Extra = append(reply.Extra, test.SRV(
fmt.Sprintf("large.example.com. 10 IN SRV 0 0 80 10-0-0-%d.default.pod.k8s.example.com.", i)))
}
_, got := req.Scrub(reply)
if want := ScrubExtra; want != got {
t.Errorf("Want scrub result %d, got %d", want, got)
}
if want, got := req.Size(), reply.Len(); want < got {
t.Errorf("Want scrub to reduce message length below %d bytes, got %d bytes", want, got)
}
if reply.Truncated {
t.Errorf("Want scrub to not set truncated bit")
}
opt := reply.Extra[len(reply.Extra)-1]
if opt.Header().Rrtype != dns.TypeOPT {
t.Errorf("Last RR must be OPT record")
}
}
func TestRequestScrubAnswerExact(t *testing.T) {
m := new(dns.Msg)
m.SetQuestion("large.example.com.", dns.TypeSRV)
m.SetEdns0(867, false) // Bit fiddly, but this hits the rl == size break clause in Scrub, 52 RRs should remain.
req := Request{W: &test.ResponseWriter{}, Req: m}
reply := new(dns.Msg)
reply.SetReply(m)
for i := 1; i < 200; i++ {
reply.Answer = append(reply.Answer, test.A(fmt.Sprintf("large.example.com. 10 IN A 127.0.0.%d", i)))
}
_, got := req.Scrub(reply)
if want := ScrubAnswer; want != got {
t.Errorf("Want scrub result %d, got %d", want, got)
}
if want, got := req.Size(), reply.Len(); want < got {
t.Errorf("Want scrub to reduce message length below %d bytes, got %d bytes", want, got)
}
}
func TestRequestMatch(t *testing.T) {
st := testRequest()
reply := new(dns.Msg)
reply.Response = true
reply.SetQuestion("example.com.", dns.TypeMX)
if b := st.Match(reply); b {
t.Errorf("Failed to match %s %d, got %t, expected %t", "example.com.", dns.TypeMX, b, false)
}
reply.SetQuestion("example.com.", dns.TypeA)
if b := st.Match(reply); !b {
t.Errorf("Failed to match %s %d, got %t, expected %t", "example.com.", dns.TypeA, b, true)
}
reply.SetQuestion("example.org.", dns.TypeA)
if b := st.Match(reply); b {
t.Errorf("Failed to match %s %d, got %t, expected %t", "example.org.", dns.TypeA, b, false)
}
}
func BenchmarkRequestDo(b *testing.B) {
st := testRequest()
for i := 0; i < b.N; i++ {
st.Do()
}
}
func BenchmarkRequestSize(b *testing.B) {
st := testRequest()
for i := 0; i < b.N; i++ {
st.Size()
}
}
func testRequest() Request {
m := new(dns.Msg)
m.SetQuestion("example.com.", dns.TypeA)
m.SetEdns0(4097, true)
return Request{W: &test.ResponseWriter{}, Req: m}
}
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