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365 lines
8.7 KiB
365 lines
8.7 KiB
package dns_test
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import (
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"strconv"
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"testing"
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"time"
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"github.com/google/go-cmp/cmp"
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"github.com/miekg/dns"
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"v2ray.com/core"
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"v2ray.com/core/app/dispatcher"
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dnsapp "v2ray.com/core/app/dns"
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"v2ray.com/core/app/policy"
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"v2ray.com/core/app/proxyman"
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_ "v2ray.com/core/app/proxyman/inbound"
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_ "v2ray.com/core/app/proxyman/outbound"
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"v2ray.com/core/common"
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"v2ray.com/core/common/net"
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"v2ray.com/core/common/serial"
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dns_proxy "v2ray.com/core/proxy/dns"
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"v2ray.com/core/proxy/dokodemo"
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"v2ray.com/core/testing/servers/tcp"
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"v2ray.com/core/testing/servers/udp"
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)
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type staticHandler struct {
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}
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func (*staticHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) {
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ans := new(dns.Msg)
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ans.Id = r.Id
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var clientIP net.IP
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opt := r.IsEdns0()
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if opt != nil {
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for _, o := range opt.Option {
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if o.Option() == dns.EDNS0SUBNET {
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subnet := o.(*dns.EDNS0_SUBNET)
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clientIP = subnet.Address
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}
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}
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}
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for _, q := range r.Question {
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if q.Name == "google.com." && q.Qtype == dns.TypeA {
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if clientIP == nil {
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rr, _ := dns.NewRR("google.com. IN A 8.8.8.8")
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ans.Answer = append(ans.Answer, rr)
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} else {
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rr, _ := dns.NewRR("google.com. IN A 8.8.4.4")
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ans.Answer = append(ans.Answer, rr)
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}
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} else if q.Name == "facebook.com." && q.Qtype == dns.TypeA {
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rr, _ := dns.NewRR("facebook.com. IN A 9.9.9.9")
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ans.Answer = append(ans.Answer, rr)
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} else if q.Name == "ipv6.google.com." && q.Qtype == dns.TypeA {
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rr, err := dns.NewRR("ipv6.google.com. IN A 8.8.8.7")
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common.Must(err)
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ans.Answer = append(ans.Answer, rr)
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} else if q.Name == "ipv6.google.com." && q.Qtype == dns.TypeAAAA {
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rr, err := dns.NewRR("ipv6.google.com. IN AAAA 2001:4860:4860::8888")
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common.Must(err)
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ans.Answer = append(ans.Answer, rr)
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} else if q.Name == "notexist.google.com." && q.Qtype == dns.TypeAAAA {
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ans.MsgHdr.Rcode = dns.RcodeNameError
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}
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}
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w.WriteMsg(ans)
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}
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func TestUDPDNSTunnel(t *testing.T) {
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port := udp.PickPort()
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dnsServer := dns.Server{
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Addr: "127.0.0.1:" + port.String(),
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Net: "udp",
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Handler: &staticHandler{},
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UDPSize: 1200,
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}
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defer dnsServer.Shutdown()
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go dnsServer.ListenAndServe()
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time.Sleep(time.Second)
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serverPort := udp.PickPort()
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config := &core.Config{
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App: []*serial.TypedMessage{
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serial.ToTypedMessage(&dnsapp.Config{
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NameServers: []*net.Endpoint{
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{
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Network: net.Network_UDP,
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Address: &net.IPOrDomain{
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Address: &net.IPOrDomain_Ip{
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Ip: []byte{127, 0, 0, 1},
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},
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},
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Port: uint32(port),
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},
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},
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}),
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serial.ToTypedMessage(&dispatcher.Config{}),
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serial.ToTypedMessage(&proxyman.OutboundConfig{}),
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serial.ToTypedMessage(&proxyman.InboundConfig{}),
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serial.ToTypedMessage(&policy.Config{}),
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},
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Inbound: []*core.InboundHandlerConfig{
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{
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ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
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Address: net.NewIPOrDomain(net.LocalHostIP),
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Port: uint32(port),
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Networks: []net.Network{net.Network_UDP},
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}),
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ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
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PortRange: net.SinglePortRange(serverPort),
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Listen: net.NewIPOrDomain(net.LocalHostIP),
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}),
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},
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},
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Outbound: []*core.OutboundHandlerConfig{
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{
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ProxySettings: serial.ToTypedMessage(&dns_proxy.Config{}),
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},
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},
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}
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v, err := core.New(config)
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common.Must(err)
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common.Must(v.Start())
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defer v.Close()
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{
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m1 := new(dns.Msg)
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m1.Id = dns.Id()
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m1.RecursionDesired = true
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m1.Question = make([]dns.Question, 1)
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m1.Question[0] = dns.Question{"google.com.", dns.TypeA, dns.ClassINET}
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c := new(dns.Client)
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in, _, err := c.Exchange(m1, "127.0.0.1:"+strconv.Itoa(int(serverPort)))
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common.Must(err)
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if len(in.Answer) != 1 {
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t.Fatal("len(answer): ", len(in.Answer))
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}
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rr, ok := in.Answer[0].(*dns.A)
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if !ok {
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t.Fatal("not A record")
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}
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if r := cmp.Diff(rr.A[:], net.IP{8, 8, 8, 8}); r != "" {
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t.Error(r)
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}
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}
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{
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m1 := new(dns.Msg)
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m1.Id = dns.Id()
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m1.RecursionDesired = true
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m1.Question = make([]dns.Question, 1)
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m1.Question[0] = dns.Question{"ipv4only.google.com.", dns.TypeAAAA, dns.ClassINET}
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c := new(dns.Client)
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in, _, err := c.Exchange(m1, "127.0.0.1:"+strconv.Itoa(int(serverPort)))
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common.Must(err)
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if len(in.Answer) != 0 {
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t.Fatal("len(answer): ", len(in.Answer))
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}
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}
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{
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m1 := new(dns.Msg)
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m1.Id = dns.Id()
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m1.RecursionDesired = true
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m1.Question = make([]dns.Question, 1)
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m1.Question[0] = dns.Question{"notexist.google.com.", dns.TypeAAAA, dns.ClassINET}
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c := new(dns.Client)
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in, _, err := c.Exchange(m1, "127.0.0.1:"+strconv.Itoa(int(serverPort)))
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common.Must(err)
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if in.Rcode != dns.RcodeNameError {
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t.Error("expected NameError, but got ", in.Rcode)
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}
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}
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}
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func TestTCPDNSTunnel(t *testing.T) {
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port := udp.PickPort()
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dnsServer := dns.Server{
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Addr: "127.0.0.1:" + port.String(),
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Net: "udp",
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Handler: &staticHandler{},
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}
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defer dnsServer.Shutdown()
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go dnsServer.ListenAndServe()
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time.Sleep(time.Second)
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serverPort := tcp.PickPort()
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config := &core.Config{
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App: []*serial.TypedMessage{
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serial.ToTypedMessage(&dnsapp.Config{
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NameServer: []*dnsapp.NameServer{
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{
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Address: &net.Endpoint{
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Network: net.Network_UDP,
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Address: &net.IPOrDomain{
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Address: &net.IPOrDomain_Ip{
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Ip: []byte{127, 0, 0, 1},
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},
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},
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Port: uint32(port),
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},
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},
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},
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}),
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serial.ToTypedMessage(&dispatcher.Config{}),
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serial.ToTypedMessage(&proxyman.OutboundConfig{}),
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serial.ToTypedMessage(&proxyman.InboundConfig{}),
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serial.ToTypedMessage(&policy.Config{}),
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},
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Inbound: []*core.InboundHandlerConfig{
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{
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ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
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Address: net.NewIPOrDomain(net.LocalHostIP),
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Port: uint32(port),
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Networks: []net.Network{net.Network_TCP},
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}),
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ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
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PortRange: net.SinglePortRange(serverPort),
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Listen: net.NewIPOrDomain(net.LocalHostIP),
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}),
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},
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},
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Outbound: []*core.OutboundHandlerConfig{
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{
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ProxySettings: serial.ToTypedMessage(&dns_proxy.Config{}),
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},
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},
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}
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v, err := core.New(config)
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common.Must(err)
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common.Must(v.Start())
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defer v.Close()
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m1 := new(dns.Msg)
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m1.Id = dns.Id()
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m1.RecursionDesired = true
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m1.Question = make([]dns.Question, 1)
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m1.Question[0] = dns.Question{"google.com.", dns.TypeA, dns.ClassINET}
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c := &dns.Client{
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Net: "tcp",
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}
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in, _, err := c.Exchange(m1, "127.0.0.1:"+serverPort.String())
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common.Must(err)
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if len(in.Answer) != 1 {
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t.Fatal("len(answer): ", len(in.Answer))
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}
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rr, ok := in.Answer[0].(*dns.A)
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if !ok {
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t.Fatal("not A record")
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}
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if r := cmp.Diff(rr.A[:], net.IP{8, 8, 8, 8}); r != "" {
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t.Error(r)
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}
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}
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func TestUDP2TCPDNSTunnel(t *testing.T) {
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port := tcp.PickPort()
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dnsServer := dns.Server{
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Addr: "127.0.0.1:" + port.String(),
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Net: "tcp",
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Handler: &staticHandler{},
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}
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defer dnsServer.Shutdown()
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go dnsServer.ListenAndServe()
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time.Sleep(time.Second)
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serverPort := tcp.PickPort()
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config := &core.Config{
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App: []*serial.TypedMessage{
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serial.ToTypedMessage(&dnsapp.Config{
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NameServer: []*dnsapp.NameServer{
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{
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Address: &net.Endpoint{
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Network: net.Network_UDP,
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Address: &net.IPOrDomain{
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Address: &net.IPOrDomain_Ip{
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Ip: []byte{127, 0, 0, 1},
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},
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},
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Port: uint32(port),
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},
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},
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},
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}),
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serial.ToTypedMessage(&dispatcher.Config{}),
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serial.ToTypedMessage(&proxyman.OutboundConfig{}),
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serial.ToTypedMessage(&proxyman.InboundConfig{}),
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serial.ToTypedMessage(&policy.Config{}),
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},
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Inbound: []*core.InboundHandlerConfig{
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{
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ProxySettings: serial.ToTypedMessage(&dokodemo.Config{
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Address: net.NewIPOrDomain(net.LocalHostIP),
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Port: uint32(port),
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Networks: []net.Network{net.Network_TCP},
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}),
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ReceiverSettings: serial.ToTypedMessage(&proxyman.ReceiverConfig{
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PortRange: net.SinglePortRange(serverPort),
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Listen: net.NewIPOrDomain(net.LocalHostIP),
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}),
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},
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},
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Outbound: []*core.OutboundHandlerConfig{
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{
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ProxySettings: serial.ToTypedMessage(&dns_proxy.Config{
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Server: &net.Endpoint{
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Network: net.Network_TCP,
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},
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}),
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},
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},
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}
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v, err := core.New(config)
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common.Must(err)
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common.Must(v.Start())
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defer v.Close()
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m1 := new(dns.Msg)
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m1.Id = dns.Id()
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m1.RecursionDesired = true
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m1.Question = make([]dns.Question, 1)
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m1.Question[0] = dns.Question{"google.com.", dns.TypeA, dns.ClassINET}
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c := &dns.Client{
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Net: "tcp",
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}
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in, _, err := c.Exchange(m1, "127.0.0.1:"+serverPort.String())
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common.Must(err)
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if len(in.Answer) != 1 {
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t.Fatal("len(answer): ", len(in.Answer))
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}
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rr, ok := in.Answer[0].(*dns.A)
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if !ok {
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t.Fatal("not A record")
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}
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if r := cmp.Diff(rr.A[:], net.IP{8, 8, 8, 8}); r != "" {
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t.Error(r)
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}
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}
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