982 lines
23 KiB
Go
982 lines
23 KiB
Go
|
||
package rtmp
|
||
|
||
import (
|
||
"bytes"
|
||
"net"
|
||
"bufio"
|
||
"time"
|
||
"fmt"
|
||
"encoding/hex"
|
||
"io"
|
||
"github.com/nareix/pio"
|
||
"github.com/nareix/flv/flvio"
|
||
"github.com/nareix/av"
|
||
"github.com/nareix/codec/h264parser"
|
||
"github.com/nareix/codec/aacparser"
|
||
"crypto/hmac"
|
||
"crypto/sha256"
|
||
"crypto/rand"
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||
)
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|
||
type Server struct {
|
||
Addr string
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||
HandlePublish func(*Conn)
|
||
HandlePlay func(*Conn)
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||
}
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||
|
||
func (self *Server) handleConn(conn *Conn) (err error) {
|
||
if err = conn.determineType(); err != nil {
|
||
fmt.Println("rtmp: conn closed:", err)
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||
return
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||
}
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||
|
||
if conn.playing {
|
||
if self.HandlePlay != nil {
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||
self.HandlePlay(conn)
|
||
conn.Close()
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||
}
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||
}
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||
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||
return
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||
}
|
||
|
||
func (self *Server) ListenAndServe() (err error) {
|
||
addr := self.Addr
|
||
if addr == "" {
|
||
addr = ":1935"
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||
}
|
||
var tcpaddr *net.TCPAddr
|
||
if tcpaddr, err = net.ResolveTCPAddr("tcp", addr); err != nil {
|
||
err = fmt.Errorf("rtmp: ListenAndServe: %s", err)
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||
return
|
||
}
|
||
|
||
var listener *net.TCPListener
|
||
if listener, err = net.ListenTCP("tcp", tcpaddr); err != nil {
|
||
return
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||
}
|
||
|
||
var netconn net.Conn
|
||
for {
|
||
if netconn, err = listener.Accept(); err != nil {
|
||
return
|
||
}
|
||
|
||
conn := newConn(netconn)
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||
go self.handleConn(conn)
|
||
}
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||
}
|
||
|
||
type Conn struct {
|
||
RequestUri string
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||
streams []av.CodecData
|
||
|
||
br *pio.Reader
|
||
bw *pio.Writer
|
||
bufr *bufio.Reader
|
||
bufw *bufio.Writer
|
||
intw *pio.Writer
|
||
netconn net.Conn
|
||
|
||
writeMaxChunkSize int
|
||
readMaxChunkSize int
|
||
|
||
lastcsid uint32
|
||
lastcs *chunkStream
|
||
csmap map[uint32]*chunkStream
|
||
|
||
publishing, playing bool
|
||
playmsgcsid uint32
|
||
|
||
gotcommand bool
|
||
commandname string
|
||
commandtransid float64
|
||
commandobj flvio.AMFMap
|
||
commandparams []interface{}
|
||
|
||
gotmsg bool
|
||
msgdata []byte
|
||
msgtypeid uint8
|
||
msgcsid uint32
|
||
|
||
eventtype uint16
|
||
}
|
||
|
||
func newConn(netconn net.Conn) *Conn {
|
||
conn := &Conn{}
|
||
conn.netconn = netconn
|
||
conn.csmap = make(map[uint32]*chunkStream)
|
||
conn.readMaxChunkSize = 128
|
||
conn.writeMaxChunkSize = 128
|
||
conn.bufr = bufio.NewReaderSize(netconn, 512)
|
||
conn.bufw = bufio.NewWriterSize(netconn, 512)
|
||
conn.br = pio.NewReader(conn.bufr)
|
||
conn.bw = pio.NewWriter(conn.bufw)
|
||
conn.intw = pio.NewWriter(nil)
|
||
return conn
|
||
}
|
||
|
||
type chunkStream struct {
|
||
timenow uint32
|
||
timedelta uint32
|
||
hastimeext bool
|
||
msgsid uint32
|
||
msgtypeid uint8
|
||
msgdatalen uint32
|
||
msgdataleft uint32
|
||
msghdrtype uint8
|
||
msgdata []byte
|
||
}
|
||
|
||
func (self *chunkStream) Start() {
|
||
self.msgdataleft = self.msgdatalen
|
||
self.msgdata = make([]byte, self.msgdatalen)
|
||
}
|
||
|
||
const (
|
||
msgtypeidUserControl = 4
|
||
msgtypeidWindowAckSize = 5
|
||
msgtypeidSetPeerBandwidth = 6
|
||
msgtypeidSetChunkSize = 1
|
||
msgtypeidCommandMsgAMF0 = 20
|
||
msgtypeidCommandMsgAMF3 = 17
|
||
msgtypeidDataMsgAMF0 = 18
|
||
msgtypeidDataMsgAMF3 = 15
|
||
msgtypeidVideoMsg = 9
|
||
msgtypeidAudioMsg = 8
|
||
)
|
||
|
||
const (
|
||
eventtypeStreamBegin = 0
|
||
)
|
||
|
||
func (self *Conn) Close() (err error) {
|
||
return self.netconn.Close()
|
||
}
|
||
|
||
func (self *Conn) pollCommand() (err error) {
|
||
for {
|
||
if err = self.pollMsg(); err != nil {
|
||
return
|
||
}
|
||
if self.gotcommand {
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
func (self *Conn) pollMsg() (err error) {
|
||
self.gotmsg = false
|
||
self.gotcommand = false
|
||
for {
|
||
if err = self.readChunk(); err != nil {
|
||
return
|
||
}
|
||
if self.gotmsg {
|
||
fmt.Println("rtmp: gotmsg iscommand", self.gotcommand)
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
func (self *Conn) determineType() (err error) {
|
||
if err = self.handshake(); err != nil {
|
||
return
|
||
}
|
||
|
||
// < connect
|
||
if err = self.pollCommand(); err != nil {
|
||
return
|
||
}
|
||
if self.commandname != "connect" {
|
||
err = fmt.Errorf("rtmp: first command is not connect")
|
||
return
|
||
}
|
||
|
||
// > WindowAckSize
|
||
if err = self.writeWindowAckSize(5000000); err != nil {
|
||
return
|
||
}
|
||
// > SetPeerBandwidth
|
||
if err = self.writeSetPeerBandwidth(5000000, 2); err != nil {
|
||
return
|
||
}
|
||
// > SetChunkSize
|
||
if err = self.writeSetChunkSize(uint32(self.writeMaxChunkSize)); err != nil {
|
||
return
|
||
}
|
||
|
||
// > _result("NetConnection.Connect.Success")
|
||
w := self.writeCommandMsgStart()
|
||
flvio.WriteAMF0Val(w, "_result")
|
||
flvio.WriteAMF0Val(w, self.commandtransid)
|
||
flvio.WriteAMF0Val(w, flvio.AMFMap{
|
||
"fmtVer": "FMS/3,0,1,123",
|
||
"capabilities": 31,
|
||
})
|
||
flvio.WriteAMF0Val(w, flvio.AMFMap{
|
||
"level": "status",
|
||
"code": "NetConnection.Connect.Success",
|
||
"description": "Connection Success.",
|
||
"objectEncoding": 3,
|
||
})
|
||
self.writeCommandMsgEnd(3, 0)
|
||
|
||
for {
|
||
if err = self.pollMsg(); err != nil {
|
||
return
|
||
}
|
||
if self.gotcommand {
|
||
switch self.commandname {
|
||
|
||
// < createStream
|
||
case "createStream":
|
||
self.playmsgcsid = uint32(1)
|
||
// > _result(streamid)
|
||
w := self.writeCommandMsgStart()
|
||
flvio.WriteAMF0Val(w, "_result")
|
||
flvio.WriteAMF0Val(w, self.commandtransid)
|
||
flvio.WriteAMF0Val(w, nil)
|
||
flvio.WriteAMF0Val(w, self.playmsgcsid) // streamid=1
|
||
self.writeCommandMsgEnd(3, 0)
|
||
|
||
// < play("path")
|
||
case "play":
|
||
if len(self.commandparams) < 1 {
|
||
err = fmt.Errorf("rtmp: play params invalid")
|
||
return
|
||
}
|
||
path, _ := self.commandparams[0].(string)
|
||
self.RequestUri = path
|
||
fmt.Println("rtmp: play", path)
|
||
|
||
// > streamBegin(streamid)
|
||
self.writeStreamBegin(self.playmsgcsid)
|
||
|
||
// > onStatus()
|
||
w := self.writeCommandMsgStart()
|
||
flvio.WriteAMF0Val(w, "onStatus")
|
||
flvio.WriteAMF0Val(w, self.commandtransid)
|
||
flvio.WriteAMF0Val(w, nil)
|
||
flvio.WriteAMF0Val(w, flvio.AMFMap{
|
||
"level": "status",
|
||
"code": "NetStream.Play.Start",
|
||
"description": "Start live",
|
||
})
|
||
self.writeCommandMsgEnd(5, self.playmsgcsid)
|
||
|
||
// > |RtmpSampleAccess()
|
||
w = self.writeDataMsgStart()
|
||
flvio.WriteAMF0Val(w, "|RtmpSampleAccess")
|
||
flvio.WriteAMF0Val(w, true)
|
||
flvio.WriteAMF0Val(w, true)
|
||
self.writeDataMsgEnd(5, self.playmsgcsid)
|
||
|
||
fmt.Println("rtmp: playing")
|
||
self.playing = true
|
||
return
|
||
}
|
||
|
||
}
|
||
}
|
||
|
||
return
|
||
}
|
||
|
||
func (self *Conn) WritePacket(pkt av.Packet) (err error) {
|
||
ts := uint32(pkt.Time/time.Millisecond)
|
||
stream := self.streams[pkt.Idx]
|
||
|
||
switch stream.Type() {
|
||
case av.AAC:
|
||
audiodata := self.makeAACAudiodata(stream.(av.AudioCodecData), flvio.AAC_RAW, pkt.Data)
|
||
w := self.writeAudioDataStart()
|
||
audiodata.Marshal(w)
|
||
self.writeAudioDataEnd(ts)
|
||
|
||
case av.H264:
|
||
videodata := self.makeH264Videodata(flvio.AVC_NALU, pkt.Data)
|
||
w := self.writeVideoDataStart()
|
||
videodata.Marshal(w)
|
||
self.writeVideoDataEnd(ts)
|
||
}
|
||
return
|
||
}
|
||
|
||
func (self *Conn) WriteHeader(streams []av.CodecData) (err error) {
|
||
metadata := flvio.AMFMap{}
|
||
metadata["Server"] = "joy4"
|
||
metadata["duration"] = 0
|
||
|
||
for _, _stream := range streams {
|
||
typ := _stream.Type()
|
||
switch {
|
||
case typ.IsVideo():
|
||
stream := _stream.(av.VideoCodecData)
|
||
switch typ {
|
||
case av.H264:
|
||
metadata["videocodecid"] = flvio.VIDEO_H264
|
||
|
||
default:
|
||
err = fmt.Errorf("rtmp: WriteHeader unsupported video codecType=%v", stream.Type())
|
||
return
|
||
}
|
||
|
||
metadata["width"] = stream.Width()
|
||
metadata["height"] = stream.Height()
|
||
metadata["displayWidth"] = stream.Width()
|
||
metadata["displayHeight"] = stream.Height()
|
||
metadata["framerate"] = 24 // TODO: make it correct
|
||
metadata["fps"] = 24
|
||
metadata["videodatarate"] = 1538 // TODO: make it correct
|
||
metadata["profile"] = ""
|
||
metadata["level"] = ""
|
||
|
||
case typ.IsAudio():
|
||
stream := _stream.(av.AudioCodecData)
|
||
switch typ {
|
||
case av.AAC:
|
||
metadata["audiocodecid"] = flvio.SOUND_AAC
|
||
|
||
default:
|
||
err = fmt.Errorf("rtmp: WriteHeader unsupported audio codecType=%v", stream.Type())
|
||
return
|
||
}
|
||
|
||
metadata["audiodatarate"] = 156 // TODO: make it correct
|
||
}
|
||
}
|
||
|
||
// > onMetaData()
|
||
w := self.writeDataMsgStart()
|
||
flvio.WriteAMF0Val(w, "onMetaData")
|
||
flvio.WriteAMF0Val(w, metadata)
|
||
if err = self.writeDataMsgEnd(5, self.playmsgcsid); err != nil {
|
||
return
|
||
}
|
||
|
||
// > Videodata(decoder config)
|
||
// > Audiodata(decoder config)
|
||
for _, stream := range streams {
|
||
switch stream.Type() {
|
||
case av.H264:
|
||
h264 := stream.(h264parser.CodecData)
|
||
videodata := self.makeH264Videodata(flvio.AVC_SEQHDR, h264.AVCDecoderConfRecordBytes())
|
||
w := self.writeVideoDataStart()
|
||
videodata.Marshal(w)
|
||
if err = self.writeVideoDataEnd(0); err != nil {
|
||
return
|
||
}
|
||
|
||
case av.AAC:
|
||
aac := stream.(aacparser.CodecData)
|
||
audiodata := self.makeAACAudiodata(aac, flvio.AAC_SEQHDR, aac.MPEG4AudioConfigBytes())
|
||
w := self.writeAudioDataStart()
|
||
audiodata.Marshal(w)
|
||
if err = self.writeAudioDataEnd(0); err != nil {
|
||
return
|
||
}
|
||
}
|
||
}
|
||
|
||
self.streams = streams
|
||
return
|
||
}
|
||
|
||
func (self *Conn) makeH264Videodata(pkttype uint8, data []byte) flvio.Videodata {
|
||
return flvio.Videodata{
|
||
FrameType: flvio.FRAME_KEY,
|
||
CodecID: flvio.VIDEO_H264,
|
||
AVCPacketType: pkttype,
|
||
Data: data,
|
||
}
|
||
}
|
||
|
||
func (self *Conn) makeAACAudiodata(stream av.AudioCodecData, pkttype uint8, data []byte) flvio.Audiodata {
|
||
audiodata := flvio.Audiodata{
|
||
SoundFormat: flvio.SOUND_AAC,
|
||
SoundRate: flvio.SOUND_44Khz,
|
||
AACPacketType: pkttype,
|
||
}
|
||
switch stream.SampleFormat().BytesPerSample() {
|
||
case 1:
|
||
audiodata.SoundSize = flvio.SOUND_8BIT
|
||
case 2:
|
||
audiodata.SoundSize = flvio.SOUND_16BIT
|
||
}
|
||
switch stream.ChannelLayout().Count() {
|
||
case 1:
|
||
audiodata.SoundType = flvio.SOUND_MONO
|
||
case 2:
|
||
audiodata.SoundType = flvio.SOUND_STEREO
|
||
}
|
||
return audiodata
|
||
}
|
||
|
||
func (self *Conn) writeSetChunkSize(size uint32) (err error) {
|
||
w := self.writeProtoCtrlMsgStart()
|
||
w.WriteU32BE(size)
|
||
return self.writeProtoCtrlMsgEnd(msgtypeidSetChunkSize)
|
||
}
|
||
|
||
func (self *Conn) writeWindowAckSize(size uint32) (err error) {
|
||
w := self.writeProtoCtrlMsgStart()
|
||
w.WriteU32BE(size)
|
||
return self.writeProtoCtrlMsgEnd(msgtypeidWindowAckSize)
|
||
}
|
||
|
||
func (self *Conn) writeSetPeerBandwidth(acksize uint32, limittype uint8) (err error) {
|
||
w := self.writeProtoCtrlMsgStart()
|
||
w.WriteU32BE(acksize)
|
||
w.WriteU8(limittype)
|
||
return self.writeProtoCtrlMsgEnd(msgtypeidSetPeerBandwidth)
|
||
}
|
||
|
||
func (self *Conn) writeProtoCtrlMsgStart() *pio.Writer {
|
||
self.intw.SaveToVecOn()
|
||
return self.intw
|
||
}
|
||
|
||
func (self *Conn) writeProtoCtrlMsgEnd(msgtypeid uint8) (err error) {
|
||
msgdatav := self.intw.SaveToVecOff()
|
||
return self.writeChunks(2, 0, msgtypeid, 0, msgdatav)
|
||
}
|
||
|
||
func (self *Conn) writeCommandMsgStart() *pio.Writer {
|
||
self.intw.SaveToVecOn()
|
||
return self.intw
|
||
}
|
||
|
||
func (self *Conn) writeCommandMsgEnd(csid uint32, msgcsid uint32) (err error) {
|
||
msgdatav := self.intw.SaveToVecOff()
|
||
return self.writeChunks(csid, 0, msgtypeidCommandMsgAMF0, msgcsid, msgdatav)
|
||
}
|
||
|
||
func (self *Conn) writeDataMsgStart() *pio.Writer {
|
||
self.intw.SaveToVecOn()
|
||
return self.intw
|
||
}
|
||
|
||
func (self *Conn) writeDataMsgEnd(csid uint32, msgcsid uint32) (err error) {
|
||
msgdatav := self.intw.SaveToVecOff()
|
||
return self.writeChunks(csid, 0, msgtypeidDataMsgAMF0, msgcsid, msgdatav)
|
||
}
|
||
|
||
func (self *Conn) writeVideoDataStart() *pio.Writer {
|
||
self.intw.SaveToVecOn()
|
||
return self.intw
|
||
}
|
||
|
||
func (self *Conn) writeVideoDataEnd(timestamp uint32) (err error) {
|
||
msgdatav := self.intw.SaveToVecOff()
|
||
return self.writeChunks(6, timestamp, msgtypeidVideoMsg, self.playmsgcsid, msgdatav)
|
||
}
|
||
|
||
func (self *Conn) writeAudioDataStart() *pio.Writer {
|
||
self.intw.SaveToVecOn()
|
||
return self.intw
|
||
}
|
||
|
||
func (self *Conn) writeAudioDataEnd(timestamp uint32) (err error) {
|
||
msgdatav := self.intw.SaveToVecOff()
|
||
return self.writeChunks(6, timestamp, msgtypeidAudioMsg, self.playmsgcsid, msgdatav)
|
||
}
|
||
|
||
func (self *Conn) writeUserControlMsgStart(eventtype uint16) *pio.Writer {
|
||
self.intw.SaveToVecOn()
|
||
self.intw.WriteU16BE(eventtype)
|
||
return self.intw
|
||
}
|
||
|
||
func (self *Conn) writeUserControlMsgEnd() (err error) {
|
||
msgdatav := self.intw.SaveToVecOff()
|
||
return self.writeChunks(2, 0, msgtypeidUserControl, 0, msgdatav)
|
||
}
|
||
|
||
func (self *Conn) writeStreamBegin(msgcsid uint32) (err error) {
|
||
w := self.writeUserControlMsgStart(eventtypeStreamBegin)
|
||
w.WriteU32BE(msgcsid)
|
||
return self.writeUserControlMsgEnd()
|
||
}
|
||
|
||
func (self *Conn) writeChunks(csid uint32, timestamp uint32, msgtypeid uint8, msgcsid uint32, msgdatav [][]byte) (err error) {
|
||
msgdatalen := pio.VecLen(msgdatav)
|
||
|
||
// [Type 0][Type 3][Type 3]....
|
||
|
||
// 0 1 2 3
|
||
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | timestamp |message length |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | message length (cont) |message type id| msg stream id |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | message stream id (cont) |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
//
|
||
// Figure 9 Chunk Message Header – Type 0
|
||
if err = self.bw.WriteU8(byte(csid)&0x3f); err != nil {
|
||
return
|
||
}
|
||
if err = self.bw.WriteU24BE(timestamp); err != nil {
|
||
return
|
||
}
|
||
if err = self.bw.WriteU24BE(uint32(msgdatalen)); err != nil {
|
||
return
|
||
}
|
||
if err = self.bw.WriteU8(msgtypeid); err != nil {
|
||
return
|
||
}
|
||
if err = self.bw.WriteU32BE(msgcsid); err != nil {
|
||
return
|
||
}
|
||
|
||
msgdataoff := 0
|
||
for {
|
||
size := msgdatalen - msgdataoff
|
||
if size > self.writeMaxChunkSize {
|
||
size = self.writeMaxChunkSize
|
||
}
|
||
|
||
write := pio.VecSlice(msgdatav, msgdataoff, msgdataoff+size)
|
||
for _, b := range write {
|
||
if _, err = self.bw.Write(b); err != nil {
|
||
return
|
||
}
|
||
}
|
||
|
||
msgdataoff += size
|
||
if msgdataoff == msgdatalen {
|
||
break
|
||
}
|
||
|
||
// Type 3
|
||
if err = self.bw.WriteU8(byte(csid)&0x3f|3<<6); err != nil {
|
||
return
|
||
}
|
||
}
|
||
|
||
fmt.Printf("rtmp: write chunk msgdatalen=%d\n", msgdatalen)
|
||
|
||
if err = self.bufw.Flush(); err != nil {
|
||
return
|
||
}
|
||
|
||
return
|
||
}
|
||
|
||
func (self *Conn) readChunk() (err error) {
|
||
var msghdrtype uint8
|
||
var csid uint32
|
||
var header uint8
|
||
if header, err = self.br.ReadU8(); err != nil {
|
||
return
|
||
}
|
||
msghdrtype = header>>6
|
||
|
||
csid = uint32(header)&0x3f
|
||
switch csid {
|
||
default: // Chunk basic header 1
|
||
case 0: // Chunk basic header 2
|
||
var i uint8
|
||
if i, err = self.br.ReadU8(); err != nil {
|
||
return
|
||
}
|
||
csid = uint32(i)+64
|
||
case 1: // Chunk basic header 3
|
||
var i uint16
|
||
if i, err = self.br.ReadU16BE(); err != nil {
|
||
return
|
||
}
|
||
csid = uint32(i)+64
|
||
}
|
||
|
||
var cs *chunkStream
|
||
if self.lastcs != nil && self.lastcsid == csid {
|
||
cs = self.lastcs
|
||
} else {
|
||
cs = &chunkStream{}
|
||
self.csmap[csid] = cs
|
||
}
|
||
self.lastcs = cs
|
||
self.lastcsid = csid
|
||
|
||
var timestamp uint32
|
||
|
||
switch msghdrtype {
|
||
case 0:
|
||
// 0 1 2 3
|
||
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | timestamp |message length |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | message length (cont) |message type id| msg stream id |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | message stream id (cont) |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
//
|
||
// Figure 9 Chunk Message Header – Type 0
|
||
if cs.msgdataleft != 0 {
|
||
err = fmt.Errorf("rtmp: chunk msgdataleft=%d invalid", cs.msgdataleft)
|
||
return
|
||
}
|
||
var h[]byte
|
||
if h, err = self.br.ReadBytes(11); err != nil {
|
||
return
|
||
}
|
||
timestamp = pio.GetU24BE(h[0:3])
|
||
cs.msghdrtype = msghdrtype
|
||
cs.msgdatalen = pio.GetU24BE(h[3:6])
|
||
cs.msgtypeid = h[6]
|
||
cs.msgsid = pio.GetU32BE(h[7:11])
|
||
if timestamp == 0xffffff {
|
||
if timestamp, err = self.br.ReadU32BE(); err != nil {
|
||
return
|
||
}
|
||
cs.hastimeext = true
|
||
} else {
|
||
cs.hastimeext = false
|
||
}
|
||
cs.timenow = timestamp
|
||
cs.Start()
|
||
|
||
case 1:
|
||
// 0 1 2 3
|
||
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | timestamp delta |message length |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | message length (cont) |message type id|
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
//
|
||
// Figure 10 Chunk Message Header – Type 1
|
||
if cs.msgdataleft != 0 {
|
||
err = fmt.Errorf("rtmp: chunk msgdataleft=%d invalid", cs.msgdataleft)
|
||
return
|
||
}
|
||
var h[]byte
|
||
if h, err = self.br.ReadBytes(7); err != nil {
|
||
return
|
||
}
|
||
timestamp = pio.GetU24BE(h[0:3])
|
||
cs.msghdrtype = msghdrtype
|
||
cs.msgdatalen = pio.GetU24BE(h[3:6])
|
||
cs.msgtypeid = h[6]
|
||
if timestamp == 0xffffff {
|
||
if timestamp, err = self.br.ReadU32BE(); err != nil {
|
||
return
|
||
}
|
||
cs.hastimeext = true
|
||
} else {
|
||
cs.hastimeext = false
|
||
}
|
||
cs.timedelta = timestamp
|
||
cs.timenow += timestamp
|
||
cs.Start()
|
||
|
||
case 2:
|
||
// 0 1 2
|
||
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
// | timestamp delta |
|
||
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
||
//
|
||
// Figure 11 Chunk Message Header – Type 2
|
||
if cs.msgdataleft != 0 {
|
||
err = fmt.Errorf("rtmp: chunk msgdataleft=%d invalid", cs.msgdataleft)
|
||
return
|
||
}
|
||
var h[]byte
|
||
if h, err = self.br.ReadBytes(3); err != nil {
|
||
return
|
||
}
|
||
cs.msghdrtype = msghdrtype
|
||
timestamp = pio.GetU24BE(h[0:3])
|
||
if timestamp == 0xffffff {
|
||
if timestamp, err = self.br.ReadU32BE(); err != nil {
|
||
return
|
||
}
|
||
cs.hastimeext = true
|
||
} else {
|
||
cs.hastimeext = false
|
||
}
|
||
cs.timedelta = timestamp
|
||
cs.timenow += timestamp
|
||
cs.Start()
|
||
|
||
case 3:
|
||
if cs.msgdataleft == 0 {
|
||
switch cs.msghdrtype {
|
||
case 0:
|
||
if cs.hastimeext {
|
||
if timestamp, err = self.br.ReadU32BE(); err != nil {
|
||
return
|
||
}
|
||
cs.timenow = timestamp
|
||
}
|
||
case 1, 2:
|
||
if cs.hastimeext {
|
||
if timestamp, err = self.br.ReadU32BE(); err != nil {
|
||
return
|
||
}
|
||
} else {
|
||
timestamp = cs.timedelta
|
||
}
|
||
cs.timenow += timestamp
|
||
}
|
||
cs.Start()
|
||
}
|
||
|
||
default:
|
||
err = fmt.Errorf("rtmp: invalid chunk msg header type=%d", msghdrtype)
|
||
return
|
||
}
|
||
|
||
size := int(cs.msgdataleft)
|
||
if size > self.readMaxChunkSize {
|
||
size = self.readMaxChunkSize
|
||
}
|
||
off := cs.msgdatalen-cs.msgdataleft
|
||
buf := cs.msgdata[off:int(off)+size]
|
||
if _, err = io.ReadFull(self.br, buf); err != nil {
|
||
return
|
||
}
|
||
cs.msgdataleft -= uint32(size)
|
||
|
||
if true {
|
||
fmt.Printf("rtmp: chunk csid=%d msgsid=%d msgtypeid=%d msghdrtype=%d len=%d left=%d\n",
|
||
csid, cs.msgsid, cs.msgtypeid, cs.msghdrtype, cs.msgdatalen, cs.msgdataleft)
|
||
}
|
||
|
||
if cs.msgdataleft == 0 {
|
||
if true {
|
||
fmt.Println("rtmp: chunk data")
|
||
fmt.Print(hex.Dump(cs.msgdata))
|
||
fmt.Printf("%x\n", cs.msgdata)
|
||
}
|
||
|
||
if err = self.handleMsg(csid, cs.msgtypeid, cs.msgdata); err != nil {
|
||
return
|
||
}
|
||
}
|
||
|
||
return
|
||
}
|
||
|
||
func (self *Conn) handleCommandMsgAMF0(r *pio.Reader) (err error) {
|
||
commandname, _ := flvio.ReadAMF0Val(r)
|
||
commandtransid, _ := flvio.ReadAMF0Val(r)
|
||
commandobj, _ := flvio.ReadAMF0Val(r)
|
||
|
||
var ok bool
|
||
if self.commandname, ok = commandname.(string); !ok {
|
||
err = fmt.Errorf("rtmp: CommandMsgAMF0 command is not string")
|
||
return
|
||
}
|
||
|
||
self.commandobj, _ = commandobj.(flvio.AMFMap)
|
||
self.commandtransid, _ = commandtransid.(float64)
|
||
self.commandparams = []interface{}{}
|
||
for {
|
||
if val, rerr := flvio.ReadAMF0Val(r); rerr != nil {
|
||
break
|
||
} else {
|
||
self.commandparams = append(self.commandparams, val)
|
||
}
|
||
}
|
||
|
||
self.gotcommand = true
|
||
return
|
||
}
|
||
|
||
func (self *Conn) handleMsg(msgcsid uint32, msgtypeid uint8, msgdata []byte) (err error) {
|
||
self.msgcsid = msgcsid
|
||
|
||
switch msgtypeid {
|
||
case msgtypeidCommandMsgAMF0:
|
||
r := pio.NewReaderBytes(msgdata)
|
||
if err = self.handleCommandMsgAMF0(r); err != nil {
|
||
return
|
||
}
|
||
|
||
case msgtypeidCommandMsgAMF3:
|
||
r := pio.NewReaderBytes(msgdata)
|
||
r.ReadU8() // skip first byte
|
||
if err = self.handleCommandMsgAMF0(r); err != nil {
|
||
return
|
||
}
|
||
|
||
case msgtypeidUserControl:
|
||
if len(msgdata) >= 2 {
|
||
self.eventtype = pio.GetU16BE(msgdata)
|
||
} else {
|
||
err = fmt.Errorf("rtmp: short packet of UserControl")
|
||
return
|
||
}
|
||
|
||
case msgtypeidSetPeerBandwidth:
|
||
case msgtypeidSetChunkSize:
|
||
case msgtypeidWindowAckSize:
|
||
self.msgdata = msgdata
|
||
self.msgtypeid = msgtypeid
|
||
|
||
default:
|
||
return
|
||
}
|
||
|
||
self.gotmsg = true
|
||
return
|
||
}
|
||
|
||
var (
|
||
hsClientFullKey = []byte{
|
||
'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ',
|
||
'F', 'l', 'a', 's', 'h', ' ', 'P', 'l', 'a', 'y', 'e', 'r', ' ',
|
||
'0', '0', '1',
|
||
0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1,
|
||
0x02, 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB,
|
||
0x93, 0xB8, 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE,
|
||
}
|
||
hsServerFullKey = []byte{
|
||
'G', 'e', 'n', 'u', 'i', 'n', 'e', ' ', 'A', 'd', 'o', 'b', 'e', ' ',
|
||
'F', 'l', 'a', 's', 'h', ' ', 'M', 'e', 'd', 'i', 'a', ' ',
|
||
'S', 'e', 'r', 'v', 'e', 'r', ' ',
|
||
'0', '0', '1',
|
||
0xF0, 0xEE, 0xC2, 0x4A, 0x80, 0x68, 0xBE, 0xE8, 0x2E, 0x00, 0xD0, 0xD1,
|
||
0x02, 0x9E, 0x7E, 0x57, 0x6E, 0xEC, 0x5D, 0x2D, 0x29, 0x80, 0x6F, 0xAB,
|
||
0x93, 0xB8, 0xE6, 0x36, 0xCF, 0xEB, 0x31, 0xAE,
|
||
}
|
||
hsClientPartialKey = hsClientFullKey[:30]
|
||
hsServerPartialKey = hsServerFullKey[:36]
|
||
)
|
||
|
||
func hsMakeDigest(key []byte, src []byte, skip int) (dst []byte) {
|
||
h := hmac.New(sha256.New, key)
|
||
if skip >= 0 && skip < len(src) {
|
||
if skip != 0 {
|
||
h.Write(src[:skip])
|
||
}
|
||
if len(src) != skip + 32 {
|
||
h.Write(src[skip+32:])
|
||
}
|
||
} else {
|
||
h.Write(src)
|
||
}
|
||
return h.Sum(nil)
|
||
}
|
||
|
||
func hsFindDigest(p []byte, key []byte, base int) (off int) {
|
||
for n := 0; n < 4; n++ {
|
||
off += int(p[base + n])
|
||
}
|
||
off = (off % 728) + base + 4
|
||
digest := hsMakeDigest(key, p, off)
|
||
if bytes.Compare(p[off:off+32], digest) != 0 {
|
||
off = -1
|
||
}
|
||
return off
|
||
}
|
||
|
||
func hsParseC1(p []byte) (digest []byte, err error) {
|
||
return hsParse1(p, hsClientPartialKey)
|
||
}
|
||
|
||
func hsParseS1(p []byte) (digest []byte, err error) {
|
||
return hsParse1(p, hsServerPartialKey)
|
||
}
|
||
|
||
func hsParse1(p []byte, key []byte) (digest []byte, err error) {
|
||
var off int
|
||
if off = hsFindDigest(p, key, 772); off == -1 {
|
||
if off = hsFindDigest(p, key, 8); off == -1 {
|
||
err = fmt.Errorf("rtmp: handshake: C1 parse failed")
|
||
return
|
||
}
|
||
}
|
||
digest = hsMakeDigest(key, p[off:off+32], -1)
|
||
return
|
||
}
|
||
|
||
func hsCreateS1(p []byte) {
|
||
hsCreate1(p, hsServerPartialKey)
|
||
}
|
||
|
||
func hsCreateS2(p []byte, digest []byte) {
|
||
rand.Read(p)
|
||
digest2 := hsMakeDigest(digest, p, 1536-32)
|
||
copy(p[1536-32:], digest2)
|
||
}
|
||
|
||
func hsCreate1(p []byte, key []byte) {
|
||
rand.Read(p)
|
||
off := 0
|
||
for n := 8; n < 12; n++ {
|
||
off += int(p[n])
|
||
}
|
||
off = (off % 728) + 12
|
||
digest := hsMakeDigest(key, p, off)
|
||
copy(p[off:], digest)
|
||
}
|
||
|
||
func (self *Conn) handshake() (err error) {
|
||
var version uint8
|
||
|
||
var random [1536*4]byte
|
||
var digest []byte
|
||
C1 := random[0:1536]
|
||
S1 := random[1536:1536*2]
|
||
C2 := random[1536*2:1536*3]
|
||
S2 := random[1536*3:1536*4]
|
||
|
||
// C0
|
||
if version, err = self.br.ReadU8(); err != nil {
|
||
return
|
||
}
|
||
if version != 0x3 {
|
||
err = fmt.Errorf("rtmp: handshake C0: version=%d invalid", version)
|
||
return
|
||
}
|
||
// C1
|
||
if _, err = io.ReadFull(self.br, C1); err != nil {
|
||
return
|
||
}
|
||
|
||
// TODO: do the right thing
|
||
if false {
|
||
if digest, err = hsParseC1(C1); err != nil {
|
||
return
|
||
}
|
||
serverTime := uint32(0)
|
||
serverVer := uint32(0x0d0e0a0d)
|
||
hsCreateS1(S1)
|
||
pio.PutU32BE(S1[0:4], serverTime)
|
||
pio.PutU32BE(S1[4:8], serverVer)
|
||
hsCreateS2(S2, digest)
|
||
}
|
||
|
||
// S0
|
||
if err = self.bw.WriteU8(0x3); err != nil {
|
||
return
|
||
}
|
||
// S1
|
||
if _, err = self.bw.Write(S1); err != nil {
|
||
return
|
||
}
|
||
// S2
|
||
if _, err = self.bw.Write(S2); err != nil {
|
||
return
|
||
}
|
||
if err = self.bufw.Flush(); err != nil {
|
||
return
|
||
}
|
||
|
||
// C2
|
||
if _, err = io.ReadFull(self.br, C2); err != nil {
|
||
return
|
||
}
|
||
|
||
return
|
||
}
|
||
|