|
|
package rtmp
|
|
|
|
|
|
import (
|
|
|
"encoding/hex"
|
|
|
"github.com/q191201771/nezha/pkg/bele"
|
|
|
"github.com/q191201771/nezha/pkg/connection"
|
|
|
"github.com/q191201771/nezha/pkg/log"
|
|
|
"github.com/q191201771/nezha/pkg/unique"
|
|
|
"net"
|
|
|
"net/url"
|
|
|
"strings"
|
|
|
"time"
|
|
|
)
|
|
|
|
|
|
// rtmp客户端类型连接的底层实现
|
|
|
// rtmp包的使用者应该优先使用基于ClientSession实现的PushSession和PullSession
|
|
|
type ClientSession struct {
|
|
|
UniqueKey string
|
|
|
|
|
|
t ClientSessionType
|
|
|
obs PullSessionObserver // only for PullSession
|
|
|
timeout ClientSessionTimeout
|
|
|
doResultChan chan struct{}
|
|
|
errChan chan error
|
|
|
packer *MessagePacker
|
|
|
chunkComposer *ChunkComposer
|
|
|
url *url.URL
|
|
|
tcURL string
|
|
|
appName string
|
|
|
streamName string
|
|
|
hs HandshakeClient
|
|
|
peerWinAckSize int
|
|
|
|
|
|
Conn connection.Connection
|
|
|
wChan chan []byte
|
|
|
}
|
|
|
|
|
|
type ClientSessionType int
|
|
|
|
|
|
const (
|
|
|
CSTPullSession ClientSessionType = iota
|
|
|
CSTPushSession
|
|
|
)
|
|
|
|
|
|
// 单位毫秒，如果为0，则没有超时
|
|
|
type ClientSessionTimeout struct {
|
|
|
ConnectTimeoutMS int // 建立连接超时
|
|
|
DoTimeoutMS int // 从发起连接（包含了建立连接的时间）到收到publish或play信令结果的超时
|
|
|
ReadAVTimeoutMS int // 读取音视频数据的超时
|
|
|
WriteAVTimeoutMS int // 发送音视频数据的超时
|
|
|
}
|
|
|
|
|
|
// @param t: session的类型，只能是推或者拉
|
|
|
// @param obs: 回调结束后，buffer会被重复使用
|
|
|
// @param timeout: 设置各种超时
|
|
|
func NewClientSession(t ClientSessionType, obs PullSessionObserver, timeout ClientSessionTimeout) *ClientSession {
|
|
|
var uk string
|
|
|
switch t {
|
|
|
case CSTPullSession:
|
|
|
uk = "RTMPPULL"
|
|
|
case CSTPushSession:
|
|
|
uk = "RTMPPUSH"
|
|
|
}
|
|
|
|
|
|
return &ClientSession{
|
|
|
t: t,
|
|
|
obs: obs,
|
|
|
timeout: timeout,
|
|
|
doResultChan: make(chan struct{}),
|
|
|
errChan: make(chan error),
|
|
|
packer: NewMessagePacker(),
|
|
|
chunkComposer: NewChunkComposer(),
|
|
|
UniqueKey: unique.GenUniqueKey(uk),
|
|
|
wChan: make(chan []byte, wChanSize),
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// 阻塞直到收到服务端返回的 publish start / play start 信令 或者超时
|
|
|
func (s *ClientSession) Do(rawURL string) error {
|
|
|
t := time.NewTimer(time.Duration(s.timeout.DoTimeoutMS) * time.Millisecond)
|
|
|
select {
|
|
|
case err := <-s.do(rawURL):
|
|
|
return err
|
|
|
case <-t.C:
|
|
|
return rtmpErr
|
|
|
|
|
|
}
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) do(rawURL string) <-chan error {
|
|
|
ch := make(chan error, 1)
|
|
|
if err := s.parseURL(rawURL); err != nil {
|
|
|
ch <- err
|
|
|
return ch
|
|
|
}
|
|
|
if err := s.tcpConnect(); err != nil {
|
|
|
ch <- err
|
|
|
return ch
|
|
|
}
|
|
|
|
|
|
if err := s.handshake(); err != nil {
|
|
|
ch <- err
|
|
|
return ch
|
|
|
}
|
|
|
if err := s.packer.writeChunkSize(s.Conn, LocalChunkSize); err != nil {
|
|
|
ch <- err
|
|
|
return ch
|
|
|
}
|
|
|
if err := s.packer.writeConnect(s.Conn, s.appName, s.tcURL); err != nil {
|
|
|
ch <- err
|
|
|
return ch
|
|
|
}
|
|
|
|
|
|
go func() {
|
|
|
s.errChan <- s.runReadLoop()
|
|
|
}()
|
|
|
|
|
|
select {
|
|
|
case <-s.doResultChan:
|
|
|
ch <- nil
|
|
|
break
|
|
|
case err := <-s.errChan:
|
|
|
ch <- err
|
|
|
break
|
|
|
}
|
|
|
return ch
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) WaitLoop() error {
|
|
|
return <-s.errChan
|
|
|
}
|
|
|
|
|
|
// TODO chef: mod to async
|
|
|
func (s *ClientSession) TmpWrite(b []byte) error {
|
|
|
_, err := s.Conn.Write(b)
|
|
|
return err
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) runReadLoop() error {
|
|
|
return s.chunkComposer.RunLoop(s.Conn, s.doMsg)
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doMsg(stream *Stream) error {
|
|
|
switch stream.header.MsgTypeID {
|
|
|
case typeidWinAckSize:
|
|
|
fallthrough
|
|
|
case typeidBandwidth:
|
|
|
fallthrough
|
|
|
case typeidSetChunkSize:
|
|
|
return s.doProtocolControlMessage(stream)
|
|
|
case typeidCommandMessageAMF0:
|
|
|
return s.doCommandMessage(stream)
|
|
|
case TypeidDataMessageAMF0:
|
|
|
return s.doDataMessageAMF0(stream)
|
|
|
case typeidAck:
|
|
|
return s.doAck(stream)
|
|
|
case typeidUserControl:
|
|
|
log.Warnf("read user control message, ignore. [%s]", s.UniqueKey)
|
|
|
case TypeidAudio:
|
|
|
fallthrough
|
|
|
case TypeidVideo:
|
|
|
s.obs.ReadRTMPAVMsgCB(stream.header, stream.timestampAbs, stream.msg.buf[stream.msg.b:stream.msg.e])
|
|
|
default:
|
|
|
log.Errorf("read unknown msg type id. [%s] typeid=%+v", s.UniqueKey, stream.header)
|
|
|
panic(0)
|
|
|
}
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doAck(stream *Stream) error {
|
|
|
seqNum := bele.BEUint32(stream.msg.buf[stream.msg.b:stream.msg.e])
|
|
|
log.Infof("-----> Acknowledgement. [%s] ignore. sequence number=%d.", s.UniqueKey, seqNum)
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doDataMessageAMF0(stream *Stream) error {
|
|
|
val, err := stream.msg.peekStringWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
|
|
|
switch val {
|
|
|
case "|RtmpSampleAccess": // TODO chef: handle this?
|
|
|
return nil
|
|
|
default:
|
|
|
// TODO chef:
|
|
|
log.Error(val)
|
|
|
log.Error(hex.Dump(stream.msg.buf[stream.msg.b:stream.msg.e]))
|
|
|
}
|
|
|
s.obs.ReadRTMPAVMsgCB(stream.header, stream.timestampAbs, stream.msg.buf[stream.msg.b:stream.msg.e])
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doCommandMessage(stream *Stream) error {
|
|
|
cmd, err := stream.msg.readStringWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
|
|
|
tid, err := stream.msg.readNumberWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
|
|
|
switch cmd {
|
|
|
case "onBWDone":
|
|
|
log.Warnf("-----> onBWDone. ignore. [%s]", s.UniqueKey)
|
|
|
case "_result":
|
|
|
return s.doResultMessage(stream, tid)
|
|
|
case "onStatus":
|
|
|
return s.doOnStatusMessage(stream, tid)
|
|
|
default:
|
|
|
log.Errorf("read unknown cmd. [%s] cmd=%s", s.UniqueKey, cmd)
|
|
|
}
|
|
|
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doOnStatusMessage(stream *Stream, tid int) error {
|
|
|
if err := stream.msg.readNull(); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
infos, err := stream.msg.readObjectWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
code, ok := infos["code"]
|
|
|
if !ok {
|
|
|
return rtmpErr
|
|
|
}
|
|
|
switch s.t {
|
|
|
case CSTPushSession:
|
|
|
switch code {
|
|
|
case "NetStream.Publish.Start":
|
|
|
log.Infof("-----> onStatus('NetStream.Publish.Start'). [%s]", s.UniqueKey)
|
|
|
s.notifyDoResultSucc()
|
|
|
default:
|
|
|
log.Errorf("read on status message but code field unknown. [%s] code=%s", s.UniqueKey, code)
|
|
|
}
|
|
|
case CSTPullSession:
|
|
|
switch code {
|
|
|
case "NetStream.Play.Start":
|
|
|
log.Infof("-----> onStatus('NetStream.Play.Start'). [%s]", s.UniqueKey)
|
|
|
s.notifyDoResultSucc()
|
|
|
default:
|
|
|
log.Errorf("read on status message but code field unknown. [%s] code=%s", s.UniqueKey, code)
|
|
|
}
|
|
|
}
|
|
|
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doResultMessage(stream *Stream, tid int) error {
|
|
|
switch tid {
|
|
|
case tidClientConnect:
|
|
|
_, err := stream.msg.readObjectWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
infos, err := stream.msg.readObjectWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
code, ok := infos["code"].(string)
|
|
|
if !ok {
|
|
|
return rtmpErr
|
|
|
}
|
|
|
switch code {
|
|
|
case "NetConnection.Connect.Success":
|
|
|
log.Infof("-----> _result(\"NetConnection.Connect.Success\"). [%s]", s.UniqueKey)
|
|
|
if err := s.packer.writeCreateStream(s.Conn); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
default:
|
|
|
log.Errorf("unknown code. [%s] code=%s", s.UniqueKey, code)
|
|
|
}
|
|
|
case tidClientCreateStream:
|
|
|
err := stream.msg.readNull()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
sid, err := stream.msg.readNumberWithType()
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
log.Infof("-----> _result(). [%s]", s.UniqueKey)
|
|
|
switch s.t {
|
|
|
case CSTPullSession:
|
|
|
if err := s.packer.writePlay(s.Conn, s.streamName, sid); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
case CSTPushSession:
|
|
|
if err := s.packer.writePublish(s.Conn, s.appName, s.streamName, sid); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
}
|
|
|
default:
|
|
|
log.Errorf("unknown tid. [%s] tid=%d", s.UniqueKey, tid)
|
|
|
}
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) doProtocolControlMessage(stream *Stream) error {
|
|
|
if stream.msg.len() < 4 {
|
|
|
return rtmpErr
|
|
|
}
|
|
|
val := int(bele.BEUint32(stream.msg.buf))
|
|
|
|
|
|
switch stream.header.MsgTypeID {
|
|
|
case typeidWinAckSize:
|
|
|
s.peerWinAckSize = val
|
|
|
log.Infof("-----> Window Acknowledgement Size: %d. [%s]", s.peerWinAckSize, s.UniqueKey)
|
|
|
case typeidBandwidth:
|
|
|
log.Warnf("-----> Set Peer Bandwidth. ignore. [%s]", s.UniqueKey)
|
|
|
case typeidSetChunkSize:
|
|
|
// composer内部会自动更新peer chunk size.
|
|
|
log.Infof("-----> Set Chunk Size %d. [%s]", val, s.UniqueKey)
|
|
|
default:
|
|
|
log.Errorf("unknown msg type id. [%s] id=%d", s.UniqueKey, stream.header.MsgTypeID)
|
|
|
}
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) parseURL(rawURL string) error {
|
|
|
var err error
|
|
|
s.url, err = url.Parse(rawURL)
|
|
|
if err != nil {
|
|
|
return err
|
|
|
}
|
|
|
if s.url.Scheme != "rtmp" || len(s.url.Host) == 0 || len(s.url.Path) == 0 || s.url.Path[0] != '/' {
|
|
|
return rtmpErr
|
|
|
}
|
|
|
index := strings.LastIndexByte(rawURL, '/')
|
|
|
if index == -1 {
|
|
|
return rtmpErr
|
|
|
}
|
|
|
s.tcURL = rawURL[:index]
|
|
|
strs := strings.Split(s.url.Path[1:], "/")
|
|
|
if len(strs) != 2 {
|
|
|
return rtmpErr
|
|
|
}
|
|
|
s.appName = strs[0]
|
|
|
// 有的rtmp服务器会使用url后面的参数（比如说用于鉴权），这里把它带上
|
|
|
s.streamName = strs[1] + "?" + s.url.RawQuery
|
|
|
log.Debugf("%s %s %s %+v", s.tcURL, s.appName, s.streamName, *s.url)
|
|
|
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) handshake() error {
|
|
|
if err := s.hs.WriteC0C1(s.Conn); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
if err := s.hs.ReadS0S1S2(s.Conn); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
if err := s.hs.WriteC2(s.Conn); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) tcpConnect() error {
|
|
|
var err error
|
|
|
var addr string
|
|
|
if strings.Contains(s.url.Host, ":") {
|
|
|
addr = s.url.Host
|
|
|
} else {
|
|
|
addr = s.url.Host + ":1935"
|
|
|
}
|
|
|
|
|
|
var conn net.Conn
|
|
|
if conn, err = net.DialTimeout("tcp", addr, time.Duration(s.timeout.ConnectTimeoutMS)*time.Millisecond); err != nil {
|
|
|
return err
|
|
|
}
|
|
|
|
|
|
// TODO chef: 超时由接口设置
|
|
|
s.Conn = connection.New(conn, connection.Config{
|
|
|
ReadBufSize: readBufSize,
|
|
|
})
|
|
|
return nil
|
|
|
}
|
|
|
|
|
|
func (s *ClientSession) notifyDoResultSucc() {
|
|
|
s.Conn.ModWriteBufSize(writeBufSize)
|
|
|
s.Conn.ModReadTimeoutMS(s.timeout.ReadAVTimeoutMS)
|
|
|
s.Conn.ModWriteTimeoutMS(s.timeout.WriteAVTimeoutMS)
|
|
|
s.doResultChan <- struct{}{}
|
|
|
}
|