Xray-core/proxy/dns/dns_test.go

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2020-11-25 11:01:53 +00:00
package dns_test
import (
"strconv"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/miekg/dns"
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"github.com/xtls/xray-core/app/dispatcher"
dnsapp "github.com/xtls/xray-core/app/dns"
"github.com/xtls/xray-core/app/policy"
"github.com/xtls/xray-core/app/proxyman"
_ "github.com/xtls/xray-core/app/proxyman/inbound"
_ "github.com/xtls/xray-core/app/proxyman/outbound"
"github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/net"
"github.com/xtls/xray-core/common/serial"
"github.com/xtls/xray-core/core"
dns_proxy "github.com/xtls/xray-core/proxy/dns"
"github.com/xtls/xray-core/proxy/dokodemo"
"github.com/xtls/xray-core/testing/servers/tcp"
"github.com/xtls/xray-core/testing/servers/udp"
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)
type staticHandler struct {
}
func (*staticHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
ans := new(dns.Msg)
ans.Id = r.Id
var clientIP net.IP
opt := r.IsEdns0()
if opt != nil {
for _, o := range opt.Option {
if o.Option() == dns.EDNS0SUBNET {
subnet := o.(*dns.EDNS0_SUBNET)
clientIP = subnet.Address
}
}
}
for _, q := range r.Question {
switch {
case q.Name == "google.com." && q.Qtype == dns.TypeA:
if clientIP == nil {
rr, _ := dns.NewRR("google.com. IN A 8.8.8.8")
ans.Answer = append(ans.Answer, rr)
} else {
rr, _ := dns.NewRR("google.com. IN A 8.8.4.4")
ans.Answer = append(ans.Answer, rr)
}
case q.Name == "facebook.com." && q.Qtype == dns.TypeA:
rr, _ := dns.NewRR("facebook.com. IN A 9.9.9.9")
ans.Answer = append(ans.Answer, rr)
case q.Name == "ipv6.google.com." && q.Qtype == dns.TypeA:
rr, err := dns.NewRR("ipv6.google.com. IN A 8.8.8.7")
common.Must(err)
ans.Answer = append(ans.Answer, rr)
case q.Name == "ipv6.google.com." && q.Qtype == dns.TypeAAAA:
rr, err := dns.NewRR("ipv6.google.com. IN AAAA 2001:4860:4860::8888")
common.Must(err)
ans.Answer = append(ans.Answer, rr)
case q.Name == "notexist.google.com." && q.Qtype == dns.TypeAAAA:
ans.MsgHdr.Rcode = dns.RcodeNameError
}
}
w.WriteMsg(ans)
}
func TestUDPDNSTunnel(t *testing.T) {
port := udp.PickPort()
dnsServer := dns.Server{
Addr: "127.0.0.1:" + port.String(),
Net: "udp",
Handler: &staticHandler{},
UDPSize: 1200,
}
defer dnsServer.Shutdown()
go dnsServer.ListenAndServe()
time.Sleep(time.Second)
serverPort := udp.PickPort()
config := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&dnsapp.Config{
NameServers: []*net.Endpoint{
{
Network: net.Network_UDP,
Address: &net.IPOrDomain{
Address: &net.IPOrDomain_Ip{
Ip: []byte{127, 0, 0, 1},
},
},
Port: uint32(port),
},
},
}),
serial.ToTypedMessage(&dispatcher.Config{}),
serial.ToTypedMessage(&proxyman.OutboundConfig{}),
serial.ToTypedMessage(&proxyman.InboundConfig{}),
serial.ToTypedMessage(&policy.Config{}),
},
Inbound: []*core.InboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
Address: net.NewIPOrDomain(net.LocalHostIP),
Port: uint32(port),
Networks: []net.Network{net.Network_UDP},
}),
ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
PortRange: net.SinglePortRange(serverPort),
Listen: net.NewIPOrDomain(net.LocalHostIP),
}),
},
},
Outbound: []*core.OutboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&dns_proxy.Config{}),
},
},
}
v, err := core.New(config)
common.Must(err)
common.Must(v.Start())
defer v.Close()
{
m1 := new(dns.Msg)
m1.Id = dns.Id()
m1.RecursionDesired = true
m1.Question = make([]dns.Question, 1)
m1.Question[0] = dns.Question{Name: "google.com.", Qtype: dns.TypeA, Qclass: dns.ClassINET}
c := new(dns.Client)
in, _, err := c.Exchange(m1, "127.0.0.1:"+strconv.Itoa(int(serverPort)))
common.Must(err)
if len(in.Answer) != 1 {
t.Fatal("len(answer): ", len(in.Answer))
}
rr, ok := in.Answer[0].(*dns.A)
if !ok {
t.Fatal("not A record")
}
if r := cmp.Diff(rr.A[:], net.IP{8, 8, 8, 8}); r != "" {
t.Error(r)
}
}
{
m1 := new(dns.Msg)
m1.Id = dns.Id()
m1.RecursionDesired = true
m1.Question = make([]dns.Question, 1)
m1.Question[0] = dns.Question{Name: "ipv4only.google.com.", Qtype: dns.TypeAAAA, Qclass: dns.ClassINET}
c := new(dns.Client)
c.Timeout = 10 * time.Second
in, _, err := c.Exchange(m1, "127.0.0.1:"+strconv.Itoa(int(serverPort)))
common.Must(err)
if len(in.Answer) != 0 {
t.Fatal("len(answer): ", len(in.Answer))
}
}
{
m1 := new(dns.Msg)
m1.Id = dns.Id()
m1.RecursionDesired = true
m1.Question = make([]dns.Question, 1)
m1.Question[0] = dns.Question{Name: "notexist.google.com.", Qtype: dns.TypeAAAA, Qclass: dns.ClassINET}
c := new(dns.Client)
in, _, err := c.Exchange(m1, "127.0.0.1:"+strconv.Itoa(int(serverPort)))
common.Must(err)
if in.Rcode != dns.RcodeNameError {
t.Error("expected NameError, but got ", in.Rcode)
}
}
}
func TestTCPDNSTunnel(t *testing.T) {
port := udp.PickPort()
dnsServer := dns.Server{
Addr: "127.0.0.1:" + port.String(),
Net: "udp",
Handler: &staticHandler{},
}
defer dnsServer.Shutdown()
go dnsServer.ListenAndServe()
time.Sleep(time.Second)
serverPort := tcp.PickPort()
config := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&dnsapp.Config{
NameServer: []*dnsapp.NameServer{
{
Address: &net.Endpoint{
Network: net.Network_UDP,
Address: &net.IPOrDomain{
Address: &net.IPOrDomain_Ip{
Ip: []byte{127, 0, 0, 1},
},
},
Port: uint32(port),
},
},
},
}),
serial.ToTypedMessage(&dispatcher.Config{}),
serial.ToTypedMessage(&proxyman.OutboundConfig{}),
serial.ToTypedMessage(&proxyman.InboundConfig{}),
serial.ToTypedMessage(&policy.Config{}),
},
Inbound: []*core.InboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
Address: net.NewIPOrDomain(net.LocalHostIP),
Port: uint32(port),
Networks: []net.Network{net.Network_TCP},
}),
ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
PortRange: net.SinglePortRange(serverPort),
Listen: net.NewIPOrDomain(net.LocalHostIP),
}),
},
},
Outbound: []*core.OutboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&dns_proxy.Config{}),
},
},
}
v, err := core.New(config)
common.Must(err)
common.Must(v.Start())
defer v.Close()
m1 := new(dns.Msg)
m1.Id = dns.Id()
m1.RecursionDesired = true
m1.Question = make([]dns.Question, 1)
m1.Question[0] = dns.Question{Name: "google.com.", Qtype: dns.TypeA, Qclass: dns.ClassINET}
c := &dns.Client{
Net: "tcp",
}
in, _, err := c.Exchange(m1, "127.0.0.1:"+serverPort.String())
common.Must(err)
if len(in.Answer) != 1 {
t.Fatal("len(answer): ", len(in.Answer))
}
rr, ok := in.Answer[0].(*dns.A)
if !ok {
t.Fatal("not A record")
}
if r := cmp.Diff(rr.A[:], net.IP{8, 8, 8, 8}); r != "" {
t.Error(r)
}
}
func TestUDP2TCPDNSTunnel(t *testing.T) {
port := tcp.PickPort()
dnsServer := dns.Server{
Addr: "127.0.0.1:" + port.String(),
Net: "tcp",
Handler: &staticHandler{},
}
defer dnsServer.Shutdown()
go dnsServer.ListenAndServe()
time.Sleep(time.Second)
serverPort := tcp.PickPort()
config := &core.Config{
App: []*serial.TypedMessage{
serial.ToTypedMessage(&dnsapp.Config{
NameServer: []*dnsapp.NameServer{
{
Address: &net.Endpoint{
Network: net.Network_UDP,
Address: &net.IPOrDomain{
Address: &net.IPOrDomain_Ip{
Ip: []byte{127, 0, 0, 1},
},
},
Port: uint32(port),
},
},
},
}),
serial.ToTypedMessage(&dispatcher.Config{}),
serial.ToTypedMessage(&proxyman.OutboundConfig{}),
serial.ToTypedMessage(&proxyman.InboundConfig{}),
serial.ToTypedMessage(&policy.Config{}),
},
Inbound: []*core.InboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
Address: net.NewIPOrDomain(net.LocalHostIP),
Port: uint32(port),
Networks: []net.Network{net.Network_TCP},
}),
ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
PortRange: net.SinglePortRange(serverPort),
Listen: net.NewIPOrDomain(net.LocalHostIP),
}),
},
},
Outbound: []*core.OutboundHandlerConfig{
{
ProxySettings: serial.ToTypedMessage(&dns_proxy.Config{
Server: &net.Endpoint{
Network: net.Network_TCP,
},
}),
},
},
}
v, err := core.New(config)
common.Must(err)
common.Must(v.Start())
defer v.Close()
m1 := new(dns.Msg)
m1.Id = dns.Id()
m1.RecursionDesired = true
m1.Question = make([]dns.Question, 1)
m1.Question[0] = dns.Question{Name: "google.com.", Qtype: dns.TypeA, Qclass: dns.ClassINET}
c := &dns.Client{
Net: "tcp",
}
in, _, err := c.Exchange(m1, "127.0.0.1:"+serverPort.String())
common.Must(err)
if len(in.Answer) != 1 {
t.Fatal("len(answer): ", len(in.Answer))
}
rr, ok := in.Answer[0].(*dns.A)
if !ok {
t.Fatal("not A record")
}
if r := cmp.Diff(rr.A[:], net.IP{8, 8, 8, 8}); r != "" {
t.Error(r)
}
}