handler_test.go

package fastdns

import (
	"encoding/hex"
	"net"
	"net/netip"
	"testing"
)

func mockMessage() (msg *Message) {
	// domain = hk.phus.lu
	payload, _ := hex.DecodeString("00028180000100010000000002686b0470687573026c750000010001c00c000100010000012b0004771c56be")

	msg = AcquireMessage()
	err := ParseMessage(msg, payload, true)
	if err != nil {
		panic(err)
	}

	return
}

func TestHandlerError(t *testing.T) {
	var cases = []struct {
		Hex   string
		Rcode Rcode
	}{
		{
			"000281830000000000000000",
			RcodeNXDomain,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()

	if rw.RemoteAddr().IsValid() {
		t.Errorf("MemResponseWriter shall return empty addr")
	}
	if rw.LocalAddr().IsValid() {
		t.Errorf("MemResponseWriter shall return empty addr")
	}
	for _, c := range cases {
		Error(rw, req, c.Rcode)
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("Error(%v) error got=%#v want=%#v", c.Rcode, got, want)
		}
	}
}

func TestHandlerHost1(t *testing.T) {
	var cases = []struct {
		Hex string
		IP  netip.Addr
		TTL uint32
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000100010000012c000401020408",
			netip.AddrFrom4([4]byte{1, 2, 4, 8}),
			300,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		HOST1(rw, req, c.TTL, c.IP)
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("HOST1(%v) error got=%#v want=%#v", c.IP, got, want)
		}
	}
}

func TestHandlerHost(t *testing.T) {
	var cases = []struct {
		Hex string
		IP  netip.Addr
		TTL uint32
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000100010000012c000401020408",
			netip.AddrFrom4([4]byte{1, 2, 4, 8}),
			300,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		HOST(rw, req, c.TTL, []netip.Addr{c.IP})
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("HOST(%v) error got=%#v want=%#v", c.IP, got, want)
		}
	}
}

func TestHandlerCNAME(t *testing.T) {
	var cases = []struct {
		Hex   string
		CNAME string
		TTL   uint32
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000500010000012c001305636e616d65076578616d706c6503636f6d00",
			"cname.example.com",
			300,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		CNAME(rw, req, c.TTL, []string{c.CNAME}, nil)
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("CNAME(%v) error got=%#v want=%#v", c.CNAME, got, want)
		}
	}
}

func TestHandlerSRV(t *testing.T) {
	var cases = []struct {
		Hex string
		TTL uint32
		SRV net.SRV
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c002100010000012c001c03e803e81f41087365727669636531076578616d706c6503636f6d00",
			300,
			net.SRV{Target: "service1.example.com", Port: 8001, Priority: 1000, Weight: 1000},
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		SRV(rw, req, c.TTL, []net.SRV{c.SRV})
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("SRV(%v) error got=%#v want=%#v", c.SRV, got, want)
		}
	}
}

func TestHandlerNS(t *testing.T) {
	var cases = []struct {
		Hex        string
		TTL        uint32
		Nameserver net.NS
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000200010000012c0010026e73076578616d706c6503636f6d00",
			300,
			net.NS{Host: "ns.example.com"},
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		NS(rw, req, c.TTL, []net.NS{c.Nameserver})
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("NS(%v) error got=%#v want=%#v", c.Nameserver, got, want)
		}
	}
}

func TestHandlerSOA(t *testing.T) {
	var cases = []struct {
		Hex     string
		TTL     uint32
		MName   net.NS
		RName   net.NS
		Serial  uint32
		Refresh uint32
		Retry   uint32
		Expire  uint32
		Minimum uint32
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000600010000012c003a036e733106676f6f676c6503636f6d0009646e732d61646d696e06676f6f676c6503636f6d00400000000000038400000384000007080000003c",
			300,
			net.NS{Host: "ns1.google.com"},
			net.NS{Host: "dns-admin.google.com"},
			1073741824,
			900,
			900,
			1800,
			60,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		SOA(rw, req, c.TTL, c.MName, c.RName, c.Serial, c.Refresh, c.Retry, c.Expire, c.Minimum)
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("SOA(%v) error got=%#v want=%#v", c.MName, got, want)
		}
	}
}

func TestHandlerMX(t *testing.T) {
	var cases = []struct {
		Hex string
		TTL uint32
		MX  net.MX
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000f00010000012c0013000a03707472076578616d706c65036f726700",
			300,
			net.MX{Host: "ptr.example.org", Pref: 10},
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		MX(rw, req, c.TTL, []net.MX{c.MX})
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("MX(%v) error got=%#v want=%#v", c.MX, got, want)
		}
	}
}

func TestHandlerPTR(t *testing.T) {
	var cases = []struct {
		Hex string
		PTR string
		TTL uint32
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c000c00010000012c001103707472076578616d706c65036f726700",
			"ptr.example.org",
			300,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		PTR(rw, req, c.TTL, c.PTR)
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("PTR(%v) error got=%#v want=%#v", c.PTR, got, want)
		}
	}
}

func TestHandlerTXT(t *testing.T) {
	var cases = []struct {
		Hex string
		TXT string
		TTL uint32
	}{
		{
			"00028180000100010000000002686b0470687573026c750000010001c00c001000010000012c000e0d69616d617478747265636f7264",
			"iamatxtrecord",
			300,
		},
	}

	rw, req := &MemResponseWriter{}, mockMessage()
	for _, c := range cases {
		TXT(rw, req, c.TTL, c.TXT)
		if got, want := hex.EncodeToString(rw.Data), c.Hex; got != want {
			t.Errorf("TXT(%v) error got=%#v want=%#v", c.TXT, got, want)
		}
	}
}

type nilResponseWriter struct{}

func (rw *nilResponseWriter) RemoteAddr() netip.AddrPort { return netip.AddrPort{} }

func (rw *nilResponseWriter) LocalAddr() netip.AddrPort { return netip.AddrPort{} }

func (rw *nilResponseWriter) Write(p []byte) (n int, err error) { return len(p), nil }

func BenchmarkHOST1(b *testing.B) {
	req := mockMessage()
	ip := netip.AddrFrom4([4]byte{8, 8, 8, 8})
	for i := 0; i < b.N; i++ {
		HOST1(&nilResponseWriter{}, req, 3000, ip)
	}
}

func BenchmarkHOST(b *testing.B) {
	req := mockMessage()
	ips := []netip.Addr{netip.AddrFrom4([4]byte{8, 8, 8, 8})}
	for i := 0; i < b.N; i++ {
		HOST(&nilResponseWriter{}, req, 3000, ips)
	}
}

func BenchmarkCNAME(b *testing.B) {
	req := mockMessage()
	cnames := []string{"cname.example.org"}
	for i := 0; i < b.N; i++ {
		CNAME(&nilResponseWriter{}, req, 3000, cnames, nil)
	}
}

func BenchmarkSRV(b *testing.B) {
	req := mockMessage()
	srv := net.SRV{Target: "service1.example.org", Port: 8001, Priority: 1000, Weight: 1000}
	for i := 0; i < b.N; i++ {
		SRV(&nilResponseWriter{}, req, 3000, []net.SRV{srv})
	}
}

func BenchmarkNS(b *testing.B) {
	req := mockMessage()
	nameservers := []net.NS{{Host: "ns1.google.com"}, {Host: "ns2.google.com"}}
	for i := 0; i < b.N; i++ {
		NS(&nilResponseWriter{}, req, 3000, nameservers)
	}
}

func BenchmarkSOA(b *testing.B) {
	req := mockMessage()
	for i := 0; i < b.N; i++ {
		SOA(&nilResponseWriter{}, req, 3000, net.NS{Host: "ns1.google.com"}, net.NS{Host: "dns-admin.google.com"}, 42, 900, 900, 1800, 60)
	}
}

func BenchmarkPTR(b *testing.B) {
	req := mockMessage()
	ptr := "ptr.example.org"
	for i := 0; i < b.N; i++ {
		PTR(&nilResponseWriter{}, req, 3000, ptr)
	}
}

func BenchmarkMX(b *testing.B) {
	req := mockMessage()
	mx := net.MX{Host: "mail.google.com", Pref: 100}
	for i := 0; i < b.N; i++ {
		MX(&nilResponseWriter{}, req, 3000, []net.MX{mx})
	}
}

func BenchmarkTXT(b *testing.B) {
	req := mockMessage()
	txt := "iamatxtrecord"
	for i := 0; i < b.N; i++ {
		TXT(&nilResponseWriter{}, req, 3000, txt)
	}
}