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//go:build !js
// +build !js
package mdns
import (
"bytes"
"context"
"errors"
"net"
"testing"
"time"
"github.com/pion/transport/v2/test"
"golang.org/x/net/dns/dnsmessage"
"golang.org/x/net/ipv4"
)
func check(err error, t *testing.T) {
if err != nil {
t.Fatal(err)
}
}
func createListener(t *testing.T) *net.UDPConn {
addr, err := net.ResolveUDPAddr("udp", DefaultAddress)
check(err, t)
sock, err := net.ListenUDP("udp4", addr)
check(err, t)
return sock
}
func TestValidCommunication(t *testing.T) {
lim := test.TimeOut(time.Second * 10)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
aSock := createListener(t)
bSock := createListener(t)
aServer, err := Server(ipv4.NewPacketConn(aSock), &Config{
LocalNames: []string{"pion-mdns-1.local", "pion-mdns-2.local"},
})
check(err, t)
bServer, err := Server(ipv4.NewPacketConn(bSock), &Config{})
check(err, t)
_, _, err = bServer.Query(context.TODO(), "pion-mdns-1.local")
check(err, t)
_, _, err = bServer.Query(context.TODO(), "pion-mdns-2.local")
check(err, t)
check(aServer.Close(), t)
check(bServer.Close(), t)
}
func TestMultipleClose(t *testing.T) {
lim := test.TimeOut(time.Second * 10)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
aSock := createListener(t)
server, err := Server(ipv4.NewPacketConn(aSock), &Config{})
check(err, t)
check(server.Close(), t)
check(server.Close(), t)
}
func TestQueryRespectTimeout(t *testing.T) {
lim := test.TimeOut(time.Second * 10)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
aSock := createListener(t)
server, err := Server(ipv4.NewPacketConn(aSock), &Config{})
check(err, t)
ctx, cancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
defer cancel()
if _, _, err = server.Query(ctx, "invalid-host"); !errors.Is(err, errContextElapsed) {
t.Fatalf("Query expired but returned unexpected error %v", err)
}
if closeErr := server.Close(); closeErr != nil {
t.Fatal(closeErr)
}
}
func TestQueryRespectClose(t *testing.T) {
lim := test.TimeOut(time.Second * 10)
defer lim.Stop()
report := test.CheckRoutines(t)
defer report()
aSock := createListener(t)
server, err := Server(ipv4.NewPacketConn(aSock), &Config{})
check(err, t)
go func() {
time.Sleep(3 * time.Second)
check(server.Close(), t)
}()
if _, _, err = server.Query(context.TODO(), "invalid-host"); !errors.Is(err, errConnectionClosed) {
t.Fatalf("Query on closed server but returned unexpected error %v", err)
}
if _, _, err = server.Query(context.TODO(), "invalid-host"); !errors.Is(err, errConnectionClosed) {
t.Fatalf("Query on closed server but returned unexpected error %v", err)
}
}
func TestResourceParsing(t *testing.T) {
lookForIP := func(msg dnsmessage.Message, expectedIP []byte) {
buf, err := msg.Pack()
if err != nil {
t.Fatal(err)
}
var p dnsmessage.Parser
if _, err = p.Start(buf); err != nil {
t.Fatal(err)
}
if err = p.SkipAllQuestions(); err != nil {
t.Fatal(err)
}
h, err := p.AnswerHeader()
if err != nil {
t.Fatal(err)
}
actualIP, err := ipFromAnswerHeader(h, p)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(actualIP, expectedIP) {
t.Fatalf("Expected(%v) and Actual(%v) IP don't match", expectedIP, actualIP)
}
}
name, err := dnsmessage.NewName("test-server.")
if err != nil {
t.Fatal(err)
}
t.Run("A Record", func(t *testing.T) {
lookForIP(dnsmessage.Message{
Header: dnsmessage.Header{Response: true, Authoritative: true},
Answers: []dnsmessage.Resource{
{
Header: dnsmessage.ResourceHeader{
Name: name,
Type: dnsmessage.TypeA,
Class: dnsmessage.ClassINET,
},
Body: &dnsmessage.AResource{A: [4]byte{127, 0, 0, 1}},
},
},
}, []byte{127, 0, 0, 1})
})
t.Run("AAAA Record", func(t *testing.T) {
lookForIP(dnsmessage.Message{
Header: dnsmessage.Header{Response: true, Authoritative: true},
Answers: []dnsmessage.Resource{
{
Header: dnsmessage.ResourceHeader{
Name: name,
Type: dnsmessage.TypeAAAA,
Class: dnsmessage.ClassINET,
},
Body: &dnsmessage.AAAAResource{AAAA: [16]byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}},
},
},
}, []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1})
})
}
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