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client_record_test.go
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package gortsplib
import (
"bytes"
"crypto/tls"
"net"
"strings"
"testing"
"time"
"github.com/pion/rtcp"
"github.com/pion/rtp"
"github.com/stretchr/testify/require"
"github.com/aler9/gortsplib/v2/pkg/base"
"github.com/aler9/gortsplib/v2/pkg/conn"
"github.com/aler9/gortsplib/v2/pkg/format"
"github.com/aler9/gortsplib/v2/pkg/headers"
"github.com/aler9/gortsplib/v2/pkg/media"
"github.com/aler9/gortsplib/v2/pkg/sdp"
"github.com/aler9/gortsplib/v2/pkg/url"
)
var testH264Media = &media.Media{
Type: media.TypeVideo,
Formats: []format.Format{&format.H264{
PayloadTyp: 96,
SPS: []byte{0x01, 0x02, 0x03, 0x04},
PPS: []byte{0x01, 0x02, 0x03, 0x04},
PacketizationMode: 1,
}},
}
var testRTPPacket = rtp.Packet{
Header: rtp.Header{
Version: 2,
PayloadType: 96,
CSRC: []uint32{},
SSRC: 0x38F27A2F,
},
Payload: []byte{0x01, 0x02, 0x03, 0x04},
}
var testRTPPacketMarshaled = func() []byte {
byts, _ := testRTPPacket.Marshal()
return byts
}()
var testRTCPPacket = rtcp.SourceDescription{
Chunks: []rtcp.SourceDescriptionChunk{
{
Source: 1234,
Items: []rtcp.SourceDescriptionItem{
{
Type: rtcp.SDESCNAME,
Text: "myname",
},
},
},
},
}
var testRTCPPacketMarshaled = func() []byte {
byts, _ := testRTCPPacket.Marshal()
return byts
}()
func record(c *Client, ur string, medias media.Medias, cb func(*media.Media, rtcp.Packet)) error {
u, err := url.Parse(ur)
if err != nil {
return err
}
err = c.Start(u.Scheme, u.Host)
if err != nil {
return err
}
_, err = c.Announce(u, medias)
if err != nil {
c.Close()
return err
}
err = c.SetupAll(medias, u)
if err != nil {
c.Close()
return err
}
if cb != nil {
c.OnPacketRTCPAny(cb)
}
_, err = c.Record()
if err != nil {
c.Close()
return err
}
return nil
}
func TestClientRecordSerial(t *testing.T) {
for _, transport := range []string{
"udp",
"tcp",
"tls",
} {
t.Run(transport, func(t *testing.T) {
l, err := net.Listen("tcp", "localhost:8554")
require.NoError(t, err)
defer l.Close()
var scheme string
if transport == "tls" {
scheme = "rtsps"
cert, err := tls.X509KeyPair(serverCert, serverKey)
require.NoError(t, err)
l = tls.NewListener(l, &tls.Config{Certificates: []tls.Certificate{cert}})
} else {
scheme = "rtsp"
}
serverDone := make(chan struct{})
defer func() { <-serverDone }()
go func() {
defer close(serverDone)
nconn, err := l.Accept()
require.NoError(t, err)
defer nconn.Close()
conn := conn.NewConn(nconn)
req, err := conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Options, req.Method)
require.Equal(t, mustParseURL(scheme+"://localhost:8554/teststream"), req.URL)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Public": base.HeaderValue{strings.Join([]string{
string(base.Announce),
string(base.Setup),
string(base.Record),
}, ", ")},
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Announce, req.Method)
require.Equal(t, mustParseURL(scheme+"://localhost:8554/teststream"), req.URL)
var desc sdp.SessionDescription
err = desc.Unmarshal(req.Body)
require.NoError(t, err)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
require.Equal(t, mustParseURL(
scheme+"://localhost:8554/teststream/"+controlAttribute(desc.MediaDescriptions[0])), req.URL)
var inTH headers.Transport
err = inTH.Unmarshal(req.Header["Transport"])
require.NoError(t, err)
var l1 net.PacketConn
var l2 net.PacketConn
if transport == "udp" {
l1, err = net.ListenPacket("udp", "localhost:34556")
require.NoError(t, err)
defer l1.Close()
l2, err = net.ListenPacket("udp", "localhost:34557")
require.NoError(t, err)
defer l2.Close()
}
th := headers.Transport{
Delivery: func() *headers.TransportDelivery {
v := headers.TransportDeliveryUnicast
return &v
}(),
}
if transport == "udp" {
th.Protocol = headers.TransportProtocolUDP
th.ServerPorts = &[2]int{34556, 34557}
th.ClientPorts = inTH.ClientPorts
} else {
th.Protocol = headers.TransportProtocolTCP
th.InterleavedIDs = inTH.InterleavedIDs
}
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Transport": th.Marshal(),
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
require.Equal(t, mustParseURL(scheme+"://localhost:8554/teststream"), req.URL)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
// client -> server (RTP)
if transport == "udp" {
buf := make([]byte, 2048)
n, _, err := l1.ReadFrom(buf)
require.NoError(t, err)
var pkt rtp.Packet
err = pkt.Unmarshal(buf[:n])
require.NoError(t, err)
require.Equal(t, testRTPPacket, pkt)
} else {
f, err := conn.ReadInterleavedFrame()
require.NoError(t, err)
require.Equal(t, 0, f.Channel)
var pkt rtp.Packet
err = pkt.Unmarshal(f.Payload)
require.NoError(t, err)
require.Equal(t, testRTPPacket, pkt)
}
// server -> client (RTCP)
if transport == "udp" {
l2.WriteTo(testRTCPPacketMarshaled, &net.UDPAddr{
IP: net.ParseIP("127.0.0.1"),
Port: th.ClientPorts[1],
})
} else {
err := conn.WriteInterleavedFrame(&base.InterleavedFrame{
Channel: 1,
Payload: testRTCPPacketMarshaled,
}, make([]byte, 1024))
require.NoError(t, err)
}
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Teardown, req.Method)
require.Equal(t, mustParseURL(scheme+"://localhost:8554/teststream"), req.URL)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
}()
recvDone := make(chan struct{})
c := Client{
TLSConfig: &tls.Config{
InsecureSkipVerify: true,
},
Transport: func() *Transport {
if transport == "udp" {
v := TransportUDP
return &v
}
v := TransportTCP
return &v
}(),
}
medi := testH264Media
medias := media.Medias{medi}
err = record(&c, scheme+"://localhost:8554/teststream", medias,
func(medi *media.Media, pkt rtcp.Packet) {
require.Equal(t, &testRTCPPacket, pkt)
close(recvDone)
})
require.NoError(t, err)
done := make(chan struct{})
go func() {
defer close(done)
c.Wait()
}()
err = c.WritePacketRTP(medi, &testRTPPacket)
require.NoError(t, err)
<-recvDone
c.Close()
<-done
err = c.WritePacketRTP(medi, &testRTPPacket)
require.Error(t, err)
})
}
}
func TestClientRecordParallel(t *testing.T) {
for _, transport := range []string{
"udp",
"tcp",
"tls",
} {
t.Run(transport, func(t *testing.T) {
l, err := net.Listen("tcp", "localhost:8554")
require.NoError(t, err)
defer l.Close()
var scheme string
if transport == "tls" {
scheme = "rtsps"
cert, err := tls.X509KeyPair(serverCert, serverKey)
require.NoError(t, err)
l = tls.NewListener(l, &tls.Config{Certificates: []tls.Certificate{cert}})
} else {
scheme = "rtsp"
}
serverDone := make(chan struct{})
defer func() { <-serverDone }()
go func() {
defer close(serverDone)
nconn, err := l.Accept()
require.NoError(t, err)
defer nconn.Close()
conn := conn.NewConn(nconn)
req, err := conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Options, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Public": base.HeaderValue{strings.Join([]string{
string(base.Announce),
string(base.Setup),
string(base.Record),
}, ", ")},
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Announce, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
var inTH headers.Transport
err = inTH.Unmarshal(req.Header["Transport"])
require.NoError(t, err)
th := headers.Transport{
Delivery: func() *headers.TransportDelivery {
v := headers.TransportDeliveryUnicast
return &v
}(),
}
if transport == "udp" {
th.Protocol = headers.TransportProtocolUDP
th.ServerPorts = &[2]int{34556, 34557}
th.ClientPorts = inTH.ClientPorts
} else {
th.Protocol = headers.TransportProtocolTCP
th.InterleavedIDs = inTH.InterleavedIDs
}
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Transport": th.Marshal(),
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequestIgnoreFrames()
require.NoError(t, err)
require.Equal(t, base.Teardown, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
}()
c := Client{
TLSConfig: &tls.Config{
InsecureSkipVerify: true,
},
Transport: func() *Transport {
if transport == "udp" {
v := TransportUDP
return &v
}
v := TransportTCP
return &v
}(),
}
writerDone := make(chan struct{})
defer func() { <-writerDone }()
medi := testH264Media
medias := media.Medias{medi}
err = record(&c, scheme+"://localhost:8554/teststream", medias, nil)
require.NoError(t, err)
defer c.Close()
go func() {
defer close(writerDone)
t := time.NewTicker(50 * time.Millisecond)
defer t.Stop()
for range t.C {
err := c.WritePacketRTP(medi, &testRTPPacket)
if err != nil {
return
}
}
}()
time.Sleep(1 * time.Second)
})
}
}
func TestClientRecordPauseSerial(t *testing.T) {
for _, transport := range []string{
"udp",
"tcp",
} {
t.Run(transport, func(t *testing.T) {
l, err := net.Listen("tcp", "localhost:8554")
require.NoError(t, err)
defer l.Close()
serverDone := make(chan struct{})
defer func() { <-serverDone }()
go func() {
defer close(serverDone)
nconn, err := l.Accept()
require.NoError(t, err)
defer nconn.Close()
conn := conn.NewConn(nconn)
req, err := conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Options, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Public": base.HeaderValue{strings.Join([]string{
string(base.Announce),
string(base.Setup),
string(base.Record),
string(base.Pause),
}, ", ")},
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Announce, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
var inTH headers.Transport
err = inTH.Unmarshal(req.Header["Transport"])
require.NoError(t, err)
th := headers.Transport{
Delivery: func() *headers.TransportDelivery {
v := headers.TransportDeliveryUnicast
return &v
}(),
}
if transport == "udp" {
th.Protocol = headers.TransportProtocolUDP
th.ServerPorts = &[2]int{34556, 34557}
th.ClientPorts = inTH.ClientPorts
} else {
th.Protocol = headers.TransportProtocolTCP
th.InterleavedIDs = inTH.InterleavedIDs
}
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Transport": th.Marshal(),
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequestIgnoreFrames()
require.NoError(t, err)
require.Equal(t, base.Pause, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequestIgnoreFrames()
require.NoError(t, err)
require.Equal(t, base.Teardown, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
}()
c := Client{
Transport: func() *Transport {
if transport == "udp" {
v := TransportUDP
return &v
}
v := TransportTCP
return &v
}(),
}
medi := testH264Media
medias := media.Medias{medi}
err = record(&c, "rtsp://localhost:8554/teststream", medias, nil)
require.NoError(t, err)
defer c.Close()
err = c.WritePacketRTP(medi, &testRTPPacket)
require.NoError(t, err)
_, err = c.Pause()
require.NoError(t, err)
_, err = c.Record()
require.NoError(t, err)
err = c.WritePacketRTP(medi, &testRTPPacket)
require.NoError(t, err)
})
}
}
func TestClientRecordPauseParallel(t *testing.T) {
for _, transport := range []string{
"udp",
"tcp",
} {
t.Run(transport, func(t *testing.T) {
l, err := net.Listen("tcp", "localhost:8554")
require.NoError(t, err)
defer l.Close()
serverDone := make(chan struct{})
defer func() { <-serverDone }()
go func() {
defer close(serverDone)
nconn, err := l.Accept()
require.NoError(t, err)
defer nconn.Close()
conn := conn.NewConn(nconn)
req, err := conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Options, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Public": base.HeaderValue{strings.Join([]string{
string(base.Announce),
string(base.Setup),
string(base.Record),
string(base.Pause),
}, ", ")},
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Announce, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
var inTH headers.Transport
err = inTH.Unmarshal(req.Header["Transport"])
require.NoError(t, err)
th := headers.Transport{
Delivery: func() *headers.TransportDelivery {
v := headers.TransportDeliveryUnicast
return &v
}(),
}
if transport == "udp" {
th.Protocol = headers.TransportProtocolUDP
th.ServerPorts = &[2]int{34556, 34557}
th.ClientPorts = inTH.ClientPorts
} else {
th.Protocol = headers.TransportProtocolTCP
th.InterleavedIDs = inTH.InterleavedIDs
}
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Transport": th.Marshal(),
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequestIgnoreFrames()
require.NoError(t, err)
require.Equal(t, base.Pause, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
}()
c := Client{
Transport: func() *Transport {
if transport == "udp" {
v := TransportUDP
return &v
}
v := TransportTCP
return &v
}(),
}
medi := testH264Media
medias := media.Medias{medi}
err = record(&c, "rtsp://localhost:8554/teststream", medias, nil)
require.NoError(t, err)
writerDone := make(chan struct{})
go func() {
defer close(writerDone)
t := time.NewTicker(50 * time.Millisecond)
defer t.Stop()
for range t.C {
err := c.WritePacketRTP(medi, &testRTPPacket)
if err != nil {
return
}
}
}()
time.Sleep(1 * time.Second)
_, err = c.Pause()
require.NoError(t, err)
c.Close()
<-writerDone
})
}
}
func TestClientRecordAutomaticProtocol(t *testing.T) {
l, err := net.Listen("tcp", "localhost:8554")
require.NoError(t, err)
defer l.Close()
serverDone := make(chan struct{})
defer func() { <-serverDone }()
go func() {
defer close(serverDone)
nconn, err := l.Accept()
require.NoError(t, err)
defer nconn.Close()
conn := conn.NewConn(nconn)
req, err := conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Options, req.Method)
require.Equal(t, mustParseURL("rtsp://localhost:8554/teststream"), req.URL)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Public": base.HeaderValue{strings.Join([]string{
string(base.Announce),
string(base.Setup),
string(base.Record),
}, ", ")},
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Announce, req.Method)
require.Equal(t, mustParseURL("rtsp://localhost:8554/teststream"), req.URL)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusUnsupportedTransport,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
var inTH headers.Transport
err = inTH.Unmarshal(req.Header["Transport"])
require.NoError(t, err)
require.Equal(t, headers.TransportProtocolTCP, inTH.Protocol)
th := headers.Transport{
Delivery: func() *headers.TransportDelivery {
v := headers.TransportDeliveryUnicast
return &v
}(),
Protocol: headers.TransportProtocolTCP,
InterleavedIDs: &[2]int{0, 1},
}
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Transport": th.Marshal(),
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
require.Equal(t, mustParseURL("rtsp://localhost:8554/teststream"), req.URL)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
f, err := conn.ReadInterleavedFrame()
require.NoError(t, err)
require.Equal(t, 0, f.Channel)
var pkt rtp.Packet
err = pkt.Unmarshal(f.Payload)
require.NoError(t, err)
require.Equal(t, testRTPPacket, pkt)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Teardown, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
}()
c := Client{}
medi := testH264Media
medias := media.Medias{medi}
err = record(&c, "rtsp://localhost:8554/teststream", medias, nil)
require.NoError(t, err)
defer c.Close()
err = c.WritePacketRTP(medi, &testRTPPacket)
require.NoError(t, err)
}
func TestClientRecordDecodeErrors(t *testing.T) {
for _, ca := range []struct {
proto string
name string
}{
{"udp", "rtcp invalid"},
{"udp", "rtcp too big"},
{"tcp", "rtcp invalid"},
{"tcp", "rtcp too big"},
} {
t.Run(ca.proto+" "+ca.name, func(t *testing.T) {
errorRecv := make(chan struct{})
l, err := net.Listen("tcp", "localhost:8554")
require.NoError(t, err)
defer l.Close()
serverDone := make(chan struct{})
defer func() { <-serverDone }()
go func() {
defer close(serverDone)
nconn, err := l.Accept()
require.NoError(t, err)
defer nconn.Close()
conn := conn.NewConn(nconn)
req, err := conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Options, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Public": base.HeaderValue{strings.Join([]string{
string(base.Announce),
string(base.Setup),
string(base.Record),
}, ", ")},
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Announce, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Setup, req.Method)
var inTH headers.Transport
err = inTH.Unmarshal(req.Header["Transport"])
require.NoError(t, err)
th := headers.Transport{
Delivery: func() *headers.TransportDelivery {
v := headers.TransportDeliveryUnicast
return &v
}(),
}
if ca.proto == "udp" {
th.Protocol = headers.TransportProtocolUDP
th.ClientPorts = inTH.ClientPorts
th.ServerPorts = &[2]int{34556, 34557}
} else {
th.Protocol = headers.TransportProtocolTCP
th.InterleavedIDs = inTH.InterleavedIDs
}
var l1 net.PacketConn
var l2 net.PacketConn
if ca.proto == "udp" {
l1, err = net.ListenPacket("udp", "127.0.0.1:34556")
require.NoError(t, err)
defer l1.Close()
l2, err = net.ListenPacket("udp", "127.0.0.1:34557")
require.NoError(t, err)
defer l2.Close()
}
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
Header: base.Header{
"Transport": th.Marshal(),
},
})
require.NoError(t, err)
req, err = conn.ReadRequest()
require.NoError(t, err)
require.Equal(t, base.Record, req.Method)
err = conn.WriteResponse(&base.Response{
StatusCode: base.StatusOK,
})
require.NoError(t, err)
switch { //nolint:dupl
case ca.proto == "udp" && ca.name == "rtcp invalid":
l2.WriteTo([]byte{0x01, 0x02}, &net.UDPAddr{
IP: net.ParseIP("127.0.0.1"),
Port: th.ClientPorts[1],
})
case ca.proto == "udp" && ca.name == "rtcp too big":
l2.WriteTo(bytes.Repeat([]byte{0x01, 0x02}, 2000/2), &net.UDPAddr{
IP: net.ParseIP("127.0.0.1"),
Port: th.ClientPorts[1],
})
case ca.proto == "tcp" && ca.name == "rtcp invalid":
err = conn.WriteInterleavedFrame(&base.InterleavedFrame{
Channel: 1,
Payload: []byte{0x01, 0x02},
}, make([]byte, 2048))
require.NoError(t, err)
case ca.proto == "tcp" && ca.name == "rtcp too big":
err = conn.WriteInterleavedFrame(&base.InterleavedFrame{
Channel: 1,
Payload: bytes.Repeat([]byte{0x01, 0x02}, 2000/2),