UTLS transport

docker/Dockerfile

@@ -136,7 +136,7 @@ FROM base_pfring as conjure
 COPY sysconfig/conjure.conf /opt/conjure/sysconfig/
 COPY scripts/ /opt/conjure/scripts/
 
-RUN apt update && apt install -yq libzmq3-dev iproute2
+RUN apt update && apt install -yq libzmq3-dev iproute2 ethtool
 COPY --from=dev_img /opt/conjure/bin/ /opt/conjure/bin/
 
 # ENTRYPOINT /bin/bash

docker/README.md

@@ -154,7 +154,7 @@ CJ_IP4_ADDR=127.0.0.1
 CJ_IP6_ADDR=[::1]
 
 # application
-CJ_STATION_CONFIG=/var/lib/conjure/application_config.toml
+CJ_STATION_CONFIG=/var/lib/conjure/app_config.toml
 PHANTOM_SUBNET_LOCATION=/var/lib/conjure/phantom_subnets.toml
 
 # registration server
@@ -269,4 +269,4 @@ For detailed and up-to-date installation instructions refer to official ntop doc
 
 - Encountered err when creating Reg: Failed to select phantom IP address: generation number not recognized
   - Make sure conjure/docker/phantom_subnets.toml contains the client's generations
-  - Can be caused by clients using API trying to connect, since API is enabled by default. Can be disabled by removing `[[connect_sockets]]` entry for the API from `conjure/application/config.toml`
+  - Can be caused by clients using API trying to connect, since API is enabled by default. Can be disabled by removing `[[connect_sockets]]` entry for the API from `cmd/application/app_config.toml`

go.mod

@@ -6,6 +6,7 @@ require (
 	github.com/BurntSushi/toml v1.3.2
 	github.com/flynn/noise v1.0.0
 	github.com/go-redis/redis/v8 v8.11.5
+	github.com/golang/protobuf v1.5.3
 	github.com/google/gopacket v1.1.19
 	github.com/gorilla/mux v1.8.0
 	github.com/hashicorp/golang-lru v1.0.2
@@ -20,7 +21,6 @@ require (
 	github.com/pion/stun v0.6.1
 	github.com/pion/transport/v2 v2.2.3
 	github.com/refraction-networking/ed25519 v0.1.2
-	github.com/refraction-networking/gotapdance v1.7.1
 	github.com/refraction-networking/obfs4 v0.1.2
 	github.com/refraction-networking/utls v1.3.3
 	github.com/sirupsen/logrus v1.9.3
@@ -40,11 +40,11 @@ require (
 	github.com/dchest/siphash v1.2.3 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/gaukas/godicttls v0.0.4 // indirect
-	github.com/klauspost/compress v1.16.7 // indirect
-	github.com/onsi/gomega v1.27.6 // indirect
-	github.com/oschwald/maxminddb-golang v1.12.0 // indirect
+	github.com/klauspost/compress v1.17.0 // indirect
+	github.com/oschwald/maxminddb-golang v1.11.0 // indirect
 	github.com/pion/randutil v0.1.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/refraction-networking/gotapdance v1.7.3 // indirect
 	github.com/sergeyfrolov/bsbuffer v0.0.0-20180903213811-94e85abb8507 // indirect
 	golang.org/x/text v0.13.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
@@ -55,3 +55,5 @@ replace github.com/pion/dtls/v2 => github.com/mingyech/dtls/v2 v2.0.0
 replace github.com/pion/transport/v2 => github.com/mingyech/transport/v2 v2.0.0
 
 replace github.com/refraction-networking/gotapdance => github.com/refraction-networking/gotapdance v1.7.3-0.20230914182507-7d8ccbce6eb2
+
+replace github.com/refraction-networking/utls => ../utls

go.sum

@@ -19,6 +19,8 @@ github.com/gaukas/godicttls v0.0.4/go.mod h1:l6EenT4TLWgTdwslVb4sEMOCf7Bv0JAK67d
 github.com/go-redis/redis/v8 v8.11.5 h1:AcZZR7igkdvfVmQTPnu9WE37LRrO/YrBH5zWyjDC0oI=
 github.com/go-redis/redis/v8 v8.11.5/go.mod h1:gREzHqY1hg6oD9ngVRbLStwAWKhA0FEgq8Jd4h5lpwo=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
+github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
 github.com/google/gopacket v1.1.19 h1:ves8RnFZPGiFnTS0uPQStjwru6uO6h+nlr9j6fL7kF8=
@@ -27,8 +29,8 @@ github.com/gorilla/mux v1.8.0 h1:i40aqfkR1h2SlN9hojwV5ZA91wcXFOvkdNIeFDP5koI=
 github.com/gorilla/mux v1.8.0/go.mod h1:DVbg23sWSpFRCP0SfiEN6jmj59UnW/n46BH5rLB71So=
 github.com/hashicorp/golang-lru v1.0.2 h1:dV3g9Z/unq5DpblPpw+Oqcv4dU/1omnb4Ok8iPY6p1c=
 github.com/hashicorp/golang-lru v1.0.2/go.mod h1:iADmTwqILo4mZ8BN3D2Q6+9jd8WM5uGBxy+E8yxSoD4=
-github.com/klauspost/compress v1.16.7 h1:2mk3MPGNzKyxErAw8YaohYh69+pa4sIQSC0fPGCFR9I=
-github.com/klauspost/compress v1.16.7/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
+github.com/klauspost/compress v1.17.0 h1:Rnbp4K9EjcDuVuHtd0dgA4qNuv9yKDYKK1ulpJwgrqM=
+github.com/klauspost/compress v1.17.0/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
 github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
@@ -46,12 +48,11 @@ github.com/mroth/weightedrand v1.0.0 h1:V8JeHChvl2MP1sAoXq4brElOcza+jxLkRuwvtQu8
 github.com/mroth/weightedrand v1.0.0/go.mod h1:3p2SIcC8al1YMzGhAIoXD+r9olo/g/cdJgAD905gyNE=
 github.com/nxadm/tail v1.4.8 h1:nPr65rt6Y5JFSKQO7qToXr7pePgD6Gwiw05lkbyAQTE=
 github.com/onsi/ginkgo v1.16.5 h1:8xi0RTUf59SOSfEtZMvwTvXYMzG4gV23XVHOZiXNtnE=
-github.com/onsi/gomega v1.27.6 h1:ENqfyGeS5AX/rlXDd/ETokDz93u0YufY1Pgxuy/PvWE=
-github.com/onsi/gomega v1.27.6/go.mod h1:PIQNjfQwkP3aQAH7lf7j87O/5FiNr+ZR8+ipb+qQlhg=
+github.com/onsi/gomega v1.18.1 h1:M1GfJqGRrBrrGGsbxzV5dqM2U2ApXefZCQpkukxYRLE=
 github.com/oschwald/geoip2-golang v1.9.0 h1:uvD3O6fXAXs+usU+UGExshpdP13GAqp4GBrzN7IgKZc=
 github.com/oschwald/geoip2-golang v1.9.0/go.mod h1:BHK6TvDyATVQhKNbQBdrj9eAvuwOMi2zSFXizL3K81Y=
-github.com/oschwald/maxminddb-golang v1.12.0 h1:9FnTOD0YOhP7DGxGsq4glzpGy5+w7pq50AS6wALUMYs=
-github.com/oschwald/maxminddb-golang v1.12.0/go.mod h1:q0Nob5lTCqyQ8WT6FYgS1L7PXKVVbgiymefNwIjPzgY=
+github.com/oschwald/maxminddb-golang v1.11.0 h1:aSXMqYR/EPNjGE8epgqwDay+P30hCBZIveY0WZbAWh0=
+github.com/oschwald/maxminddb-golang v1.11.0/go.mod h1:YmVI+H0zh3ySFR3w+oz8PCfglAFj3PuCmui13+P9zDg=
 github.com/pebbe/zmq4 v1.2.10 h1:wQkqRZ3CZeABIeidr3e8uQZMMH5YAykA/WN0L5zkd1c=
 github.com/pebbe/zmq4 v1.2.10/go.mod h1:nqnPueOapVhE2wItZ0uOErngczsJdLOGkebMxaO8r48=
 github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=
@@ -73,6 +74,8 @@ github.com/refraction-networking/gotapdance v1.7.3-0.20230914182507-7d8ccbce6eb2
 github.com/refraction-networking/gotapdance v1.7.3-0.20230914182507-7d8ccbce6eb2/go.mod h1:svhsxN8LGv3FSL1RKLFXG74tWEXQ8m1xb9rFEZF2abk=
 github.com/refraction-networking/obfs4 v0.1.2 h1:J842O4fGSkd2W8ogYj0KN6gqVVY+Cpqodw9qFGL7wVU=
 github.com/refraction-networking/obfs4 v0.1.2/go.mod h1:wAl/+gWiLsrcykJA3nKJHx89f5/gXGM8UKvty7+mvbM=
+github.com/refraction-networking/utls v1.3.3-0.20230716160308-d1757c6b7716 h1:FXRAIzKKDmI/eYkfBW+1Lvg97Vc7rx7ia0xKBEY98BI=
+github.com/refraction-networking/utls v1.3.3-0.20230716160308-d1757c6b7716/go.mod h1:fmoaOww2bxzzEpIKOebIsnBvjQpqP7L2vcm/9KUfm/E=
 github.com/refraction-networking/utls v1.3.3 h1:f/TBLX7KBciRyFH3bwupp+CE4fzoYKCirhdRcC490sw=
 github.com/refraction-networking/utls v1.3.3/go.mod h1:DlecWW1LMlMJu+9qpzzQqdHDT/C2LAe03EdpLUz/RL8=
 github.com/sergeyfrolov/bsbuffer v0.0.0-20180903213811-94e85abb8507 h1:ML7ZNtcln5UBo5Wv7RIv9Xg3Pr5VuRCWLFXEwda54Y4=
@@ -150,13 +153,15 @@ golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8T
 google.golang.org/grpc v1.58.0 h1:32JY8YpPMSR45K+c3o6b8VL73V+rR8k+DeMIr4vRH8o=
 google.golang.org/grpc v1.58.0/go.mod h1:tgX3ZQDlNJGU96V6yHh1T/JeoBQ2TXdr43YbYSsCJk0=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
+google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
 google.golang.org/protobuf v1.31.0 h1:g0LDEJHgrBl9N9r17Ru3sqWhkIx2NB67okBHPwC7hs8=
 google.golang.org/protobuf v1.31.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
 gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

go.work.sum

@@ -20,6 +20,7 @@ github.com/felixge/fgprof v0.9.3/go.mod h1:RdbpDgzqYVh/T9fPELJyV7EYJuHB55UTEULNu
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/golang/glog v1.1.0 h1:/d3pCKDPWNnvIWe0vVUpNP32qc8U3PDVxySP/y360qE=
 github.com/golang/glog v1.1.0/go.mod h1:pfYeQZ3JWZoXTV5sFc986z3HTpwQs9At6P4ImfuP3NQ=
+github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
 github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
 github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/pprof v0.0.0-20211214055906-6f57359322fd h1:1FjCyPC+syAzJ5/2S8fqdZK1R22vvA0J7JZKcuOIQ7Y=

internal/testutils/tests.go

@@ -9,6 +9,7 @@ import (
 	"github.com/refraction-networking/conjure/internal/conjurepath"
 	"github.com/refraction-networking/conjure/pkg/core"
 	dd "github.com/refraction-networking/conjure/pkg/station/lib"
+	"github.com/refraction-networking/conjure/pkg/transports"
 	pb "github.com/refraction-networking/conjure/proto"
 	"google.golang.org/grpc/test/bufconn"
 	"google.golang.org/protobuf/reflect/protoreflect"
@@ -25,7 +26,7 @@ var TestSubnetPath = conjurepath.Root + "/internal/test_assets/phantom_subnets.t
 
 // SetupPhantomConnections registers one session with the provided transport and
 // registration manager using a pre-determined kay and phantom subnet file.
-func SetupPhantomConnections(manager *dd.RegistrationManager, transport pb.TransportType, params protoreflect.ProtoMessage, libver uint) (clientToPhantom net.Conn, serverFromPhantom net.Conn, reg *dd.DecoyRegistration) {
+func SetupPhantomConnections(manager *dd.RegistrationManager, transport pb.TransportType, params protoreflect.ProtoMessage, libver uint) (clientToPhantom net.Conn, serverFromPhantom net.Conn, reg transports.Registration) {
 	return SetupPhantomConnectionsSecret(manager, transport, params, SharedSecret, libver, TestSubnetPath)
 }
 

internal/transport_integration_test.go

@@ -22,6 +22,7 @@
 	"github.com/refraction-networking/conjure/pkg/transports/wrapping/min"
 	"github.com/refraction-networking/conjure/pkg/transports/wrapping/obfs4"
 	"github.com/refraction-networking/conjure/pkg/transports/wrapping/prefix"
+	"github.com/refraction-networking/conjure/pkg/transports/wrapping/utls"
 	pb "github.com/refraction-networking/conjure/proto"
 	"github.com/refraction-networking/ed25519"
 	"github.com/refraction-networking/ed25519/extra25519"
@@ -76,6 +77,15 @@
 			&min.ClientTransport{},
 			genericParamPermutations,
 		},
+		{
+			func(privKey [32]byte) lib.WrappingTransport {
+				tr, err := utls.New(privKey)
+				require.Nil(t, err)
+				return tr
+			},
+			&utls.ClientTransport{},
+			utlsClientParamPermutations,
+		},
 	}
 	for _, testCase := range testCases {
 		t.Run(testCase.clientTransport.Name(), func(t *testing.T) {
@@ -220,10 +230,10 @@
 }
 
 func (p *genericParams) String() string {
 	return fmt.Sprintf("randDstPort: %t", p.GetRandomizeDstPort())
 }
 
-// ClientParamPermutations returns a list of client parameters for inclusions in tests that require
+// prefixClientParamPermutations returns a list of client parameters for inclusions in tests that require
 // variance.
 func prefixClientParamPermutations() []TestParams {
 	paramSet := []TestParams{}
@@ -242,3 +252,20 @@
 	}
 	return paramSet
 }
+
+// utlsClientParamPermutations returns a list of client parameters for inclusions in tests that require
+// variance.
+func utlsClientParamPermutations() []TestParams {
+	paramSet := []TestParams{}
+	for _, chID := range []int32{0, 1, 2, 3, 4, 5} {
+		for _, rand := range []bool{true, false} {
+			var p int32 = int32(chID)
+			params := &utls.ClientParams{
+				ClientHelloID:    p,
+				RandomizeDstPort: rand,
+			}
+			paramSet = append(paramSet, params)
+		}
+	}
+	return paramSet
+}

pkg/transports/wrapping/min/min_test.go

@@ -29,7 +29,10 @@ func TestSuccessfulWrap(t *testing.T) {
 	defer sfp.Close()
 	require.NotNil(t, reg)
 
-	hmacID := core.ConjureHMAC(reg.Keys.SharedSecret, "MinTrasportHMACString")
+	phantom := reg.PhantomIP()
+	require.NotNil(t, phantom)
+
+	hmacID := core.ConjureHMAC(reg.SharedSecret(), "MinTrasportHMACString")
 	message := []byte(`test message!`)
 
 	_, err := c2p.Write(append(hmacID, message...))
@@ -40,7 +43,7 @@ func TestSuccessfulWrap(t *testing.T) {
 	n, _ := sfp.Read(buf[:])
 	buffer.Write(buf[:n])
 
-	_, wrapped, err := transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+	_, wrapped, err := transport.WrapConnection(&buffer, sfp, *phantom, manager)
 	require.Nil(t, err, "error getting wrapped connection")
 
 	received := make([]byte, len(message))
@@ -56,6 +59,9 @@ func TestUnsuccessfulWrap(t *testing.T) {
 	defer c2p.Close()
 	defer sfp.Close()
 
+	phantom := reg.PhantomIP()
+	require.NotNil(t, phantom)
+
 	// No real reason for sending the shared secret; it's just 32 bytes
 	// (same length as HMAC ID) that should have no significance.
 	_, err := c2p.Write(tests.SharedSecret)
@@ -66,7 +72,7 @@ func TestUnsuccessfulWrap(t *testing.T) {
 	n, _ := sfp.Read(buf[:])
 	buffer.Write(buf[:n])
 
-	_, _, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+	_, _, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 	if !errors.Is(err, transports.ErrNotTransport) {
 		t.Fatalf("expected ErrNotTransport, got %v", err)
 	}
@@ -80,6 +86,9 @@ func TestTryAgain(t *testing.T) {
 	defer c2p.Close()
 	defer sfp.Close()
 
+	phantom := reg.PhantomIP()
+	require.NotNil(t, phantom)
+
 	var buf [32]byte
 	var buffer bytes.Buffer
 	for _, b := range tests.SharedSecret[:31] {
@@ -89,7 +98,7 @@ func TestTryAgain(t *testing.T) {
 		n, _ := sfp.Read(buf[:])
 		buffer.Write(buf[:n])
 
-		_, _, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+		_, _, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 		if !errors.Is(err, transports.ErrTryAgain) {
 			t.Fatalf("expected ErrTryAgain, got %v", err)
 		}
@@ -100,7 +109,7 @@ func TestTryAgain(t *testing.T) {
 
 	n, _ := sfp.Read(buf[:])
 	buffer.Write(buf[:n])
-	_, _, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+	_, _, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 	if !errors.Is(err, transports.ErrNotTransport) {
 		t.Fatalf("expected ErrNotTransport, got %v", err)
 	}

pkg/transports/wrapping/obfs4/obfs4_test.go

@@ -64,9 +64,12 @@ func TestSuccessfulWrap(t *testing.T) {
 	defer c2p.Close()
 	defer sfp.Close()
 
+	phantom := reg.PhantomIP()
+	require.NotNil(t, phantom)
+
 	wrappedc2p := make(chan net.Conn)
 	stateDir := ""
-	keys := reg.Keys.TransportKeys.(Obfs4Keys)
+	keys := reg.TransportKeys().(Obfs4Keys)
 	go wrapConnection(c2p, keys.NodeID.Hex(), keys.PublicKey.Hex(), wrappedc2p, stateDir)
 
 	var buf [4096]byte
@@ -76,7 +79,7 @@ func TestSuccessfulWrap(t *testing.T) {
 		n, _ := sfp.Read(buf[:])
 		buffer.Write(buf[:n])
 
-		_, wrappedsfp, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+		_, wrappedsfp, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 		if errors.Is(err, transports.ErrTryAgain) {
 			continue
 		} else if err != nil {
@@ -191,6 +194,9 @@ func TestUnsuccessfulWrap(t *testing.T) {
 	defer c2p.Close()
 	defer sfp.Close()
 
+	phantom := reg.PhantomIP()
+	require.NotNil(t, phantom)
+
 	_, err = io.Copy(c2p, io.LimitReader(rand.New(rand.NewSource(0)), 8192))
 	require.Nil(t, err)
 
@@ -199,7 +205,7 @@ func TestUnsuccessfulWrap(t *testing.T) {
 	n, _ := io.ReadFull(sfp, buf[:])
 	buffer.Write(buf[:n])
 
-	_, _, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+	_, _, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 	if !errors.Is(err, transports.ErrNotTransport) {
 		t.Fatalf("expected ErrNotTransport, got %v", err)
 	}
@@ -213,6 +219,9 @@ func TestTryAgain(t *testing.T) {
 	defer c2p.Close()
 	defer sfp.Close()
 
+	phantom := reg.PhantomIP()
+	require.NotNil(t, phantom)
+
 	r := rand.New(rand.NewSource(0))
 	var buf [8192]byte
 	var buffer bytes.Buffer
@@ -225,7 +234,7 @@ func TestTryAgain(t *testing.T) {
 		n, _ := sfp.Read(buf[:])
 		buffer.Write(buf[:n])
 
-		_, _, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+		_, _, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 		if !errors.Is(err, transports.ErrTryAgain) {
 			t.Fatalf("expected ErrTryAgain, got %v", err)
 		}
@@ -236,7 +245,7 @@ func TestTryAgain(t *testing.T) {
 
 	n, _ := sfp.Read(buf[:])
 	buffer.Write(buf[:n])
-	_, _, err = transport.WrapConnection(&buffer, sfp, reg.PhantomIp, manager)
+	_, _, err = transport.WrapConnection(&buffer, sfp, *phantom, manager)
 	if !errors.Is(err, transports.ErrNotTransport) {
 		t.Fatalf("expected ErrNotTransport, got %v", err)
 	}