package dns_test import ( "testing" "v2ray.com/core" "v2ray.com/core/app/dispatcher" . "v2ray.com/core/app/dns" "v2ray.com/core/app/policy" "v2ray.com/core/app/proxyman" _ "v2ray.com/core/app/proxyman/outbound" "v2ray.com/core/common/net" "v2ray.com/core/common/serial" "v2ray.com/core/proxy/freedom" "v2ray.com/core/testing/servers/udp" . "v2ray.com/ext/assert" "github.com/miekg/dns" ) type staticHandler struct { } func (*staticHandler) ServeDNS(w dns.ResponseWriter, r *dns.Msg) { ans := new(dns.Msg) ans.Id = r.Id for _, q := range r.Question { if q.Name == "google.com." && q.Qtype == dns.TypeA { rr, _ := dns.NewRR("google.com. IN A 8.8.8.8") ans.Answer = append(ans.Answer, rr) } else if 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) } } w.WriteMsg(ans) } func TestUDPServer(t *testing.T) { assert := With(t) port := udp.PickPort() dnsServer := dns.Server{ Addr: "127.0.0.1:" + port.String(), Net: "udp", Handler: &staticHandler{}, UDPSize: 1200, } go dnsServer.ListenAndServe() config := &core.Config{ App: []*serial.TypedMessage{ serial.ToTypedMessage(&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(&policy.Config{}), }, Outbound: []*core.OutboundHandlerConfig{ { ProxySettings: serial.ToTypedMessage(&freedom.Config{}), }, }, } v, err := core.New(config) assert(err, IsNil) client := v.DNSClient() ips, err := client.LookupIP("google.com") assert(err, IsNil) assert(len(ips), Equals, 1) assert([]byte(ips[0]), Equals, []byte{8, 8, 8, 8}) ips, err = client.LookupIP("facebook.com") assert(err, IsNil) assert(len(ips), Equals, 1) assert([]byte(ips[0]), Equals, []byte{9, 9, 9, 9}) dnsServer.Shutdown() ips, err = client.LookupIP("google.com") assert(err, IsNil) assert(len(ips), Equals, 1) assert([]byte(ips[0]), Equals, []byte{8, 8, 8, 8}) }