1063 lines
26 KiB
Go
1063 lines
26 KiB
Go
package main
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import (
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"errors"
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"fmt"
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"io"
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"net"
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"os/exec"
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"strings"
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"time"
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"github.com/aler9/gortsplib"
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"github.com/pion/sdp"
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)
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const (
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_CLIENT_CHECK_STREAM_INTERVAL = 5 * time.Second
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_CLIENT_RECEIVER_REPORT_INTERVAL = 10 * time.Second
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)
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type serverClientEvent interface {
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isServerClientEvent()
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}
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type serverClientEventFrameTcp struct {
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frame *gortsplib.InterleavedFrame
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}
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func (serverClientEventFrameTcp) isServerClientEvent() {}
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type serverClientState int
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const (
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_CLIENT_STATE_STARTING serverClientState = iota
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_CLIENT_STATE_ANNOUNCE
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_CLIENT_STATE_PRE_PLAY
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_CLIENT_STATE_PLAY
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_CLIENT_STATE_PRE_RECORD
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_CLIENT_STATE_RECORD
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)
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func (cs serverClientState) String() string {
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switch cs {
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case _CLIENT_STATE_STARTING:
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return "STARTING"
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case _CLIENT_STATE_ANNOUNCE:
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return "ANNOUNCE"
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case _CLIENT_STATE_PRE_PLAY:
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return "PRE_PLAY"
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case _CLIENT_STATE_PLAY:
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return "PLAY"
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case _CLIENT_STATE_PRE_RECORD:
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return "PRE_RECORD"
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case _CLIENT_STATE_RECORD:
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return "RECORD"
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}
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return "UNKNOWN"
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}
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type serverClient struct {
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p *program
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conn *gortsplib.ConnServer
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state serverClientState
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path string
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authUser string
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authPass string
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authHelper *gortsplib.AuthServer
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authFailures int
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streamSdpText []byte // only if publisher
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streamSdpParsed *sdp.SessionDescription // only if publisher
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streamProtocol streamProtocol
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streamTracks []*track
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rtcpReceivers []*rtcpReceiver
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readBuf *doubleBuffer
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writeBuf *doubleBuffer
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events chan serverClientEvent
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done chan struct{}
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}
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func newServerClient(p *program, nconn net.Conn) *serverClient {
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c := &serverClient{
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p: p,
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conn: gortsplib.NewConnServer(gortsplib.ConnServerConf{
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Conn: nconn,
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ReadTimeout: p.conf.ReadTimeout,
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WriteTimeout: p.conf.WriteTimeout,
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}),
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state: _CLIENT_STATE_STARTING,
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readBuf: newDoubleBuffer(512 * 1024),
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done: make(chan struct{}),
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}
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go c.run()
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return c
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}
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func (c *serverClient) log(format string, args ...interface{}) {
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c.p.log("[client %s] "+format, append([]interface{}{c.conn.NetConn().RemoteAddr().String()}, args...)...)
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}
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func (c *serverClient) ip() net.IP {
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return c.conn.NetConn().RemoteAddr().(*net.TCPAddr).IP
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}
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func (c *serverClient) zone() string {
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return c.conn.NetConn().RemoteAddr().(*net.TCPAddr).Zone
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}
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func (c *serverClient) publisherIsReady() bool {
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return c.state == _CLIENT_STATE_RECORD
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}
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func (c *serverClient) publisherSdpText() []byte {
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return c.streamSdpText
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}
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func (c *serverClient) publisherSdpParsed() *sdp.SessionDescription {
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return c.streamSdpParsed
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}
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func (c *serverClient) run() {
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if c.p.conf.PreScript != "" {
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preScript := exec.Command(c.p.conf.PreScript)
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err := preScript.Run()
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if err != nil {
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c.log("ERR: %s", err)
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}
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}
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outer:
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for {
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switch c.state {
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case _CLIENT_STATE_PLAY:
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ok := c.runPlay()
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if !ok {
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break outer
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}
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case _CLIENT_STATE_RECORD:
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ok := c.runRecord()
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if !ok {
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break outer
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}
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default:
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ok := c.runNormal()
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if !ok {
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break outer
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}
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}
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}
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c.conn.NetConn().Close() // close socket in case it has not been closed yet
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func() {
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if c.p.conf.PostScript != "" {
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postScript := exec.Command(c.p.conf.PostScript)
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err := postScript.Run()
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if err != nil {
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c.log("ERR: %s", err)
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}
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}
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}()
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close(c.done) // close() never blocks
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}
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var errClientChangeRunMode = errors.New("change run mode")
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var errClientTerminate = errors.New("terminate")
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func (c *serverClient) runNormal() bool {
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var ret bool
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outer:
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for {
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req, err := c.conn.ReadRequest()
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if err != nil {
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if err != io.EOF {
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c.log("ERR: %s", err)
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}
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ret = false
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break outer
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}
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err = c.handleRequest(req)
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switch err {
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case errClientChangeRunMode:
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ret = true
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break outer
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case errClientTerminate:
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ret = false
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break outer
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}
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}
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if !ret {
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done := make(chan struct{})
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c.p.events <- programEventClientClose{done, c}
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<-done
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}
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return ret
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}
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func (c *serverClient) runPlay() bool {
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if c.streamProtocol == _STREAM_PROTOCOL_TCP {
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readDone := make(chan error)
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go func() {
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buf := make([]byte, 2048)
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for {
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_, err := c.conn.NetConn().Read(buf)
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if err != nil {
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readDone <- err
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break
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}
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}
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}()
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outer:
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for {
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select {
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case err := <-readDone:
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if err != io.EOF {
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c.log("ERR: %s", err)
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}
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break outer
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case rawEvt := <-c.events:
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switch evt := rawEvt.(type) {
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case serverClientEventFrameTcp:
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c.conn.WriteFrame(evt.frame)
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}
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}
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}
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go func() {
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for range c.events {
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}
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}()
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done := make(chan struct{})
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c.p.events <- programEventClientClose{done, c}
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<-done
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close(c.events)
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} else {
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for {
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req, err := c.conn.ReadRequest()
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if err != nil {
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if err != io.EOF {
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c.log("ERR: %s", err)
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}
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break
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}
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err = c.handleRequest(req)
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if err != nil {
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break
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}
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}
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done := make(chan struct{})
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c.p.events <- programEventClientClose{done, c}
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<-done
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}
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return false
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}
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func (c *serverClient) runRecord() bool {
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if c.streamProtocol == _STREAM_PROTOCOL_TCP {
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frame := &gortsplib.InterleavedFrame{}
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readDone := make(chan error)
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go func() {
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for {
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frame.Content = c.readBuf.swap()
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frame.Content = frame.Content[:cap(frame.Content)]
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recv, err := c.conn.ReadFrameOrRequest(frame)
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if err != nil {
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readDone <- err
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break
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}
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switch recvt := recv.(type) {
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case *gortsplib.InterleavedFrame:
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trackId, streamType := gortsplib.ConvChannelToTrackIdAndStreamType(frame.Channel)
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if trackId >= len(c.streamTracks) {
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c.log("ERR: invalid track id '%d'", trackId)
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readDone <- nil
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break
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}
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c.rtcpReceivers[trackId].onFrame(streamType, frame.Content)
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c.p.events <- programEventClientFrameTcp{
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c.path,
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trackId,
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streamType,
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frame.Content,
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}
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case *gortsplib.Request:
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err := c.handleRequest(recvt)
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if err != nil {
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readDone <- nil
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break
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}
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}
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}
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}()
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checkStreamTicker := time.NewTicker(_CLIENT_CHECK_STREAM_INTERVAL)
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receiverReportTicker := time.NewTicker(_CLIENT_RECEIVER_REPORT_INTERVAL)
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outer1:
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for {
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select {
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case err := <-readDone:
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if err != nil && err != io.EOF {
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c.log("ERR: %s", err)
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}
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break outer1
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case <-checkStreamTicker.C:
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for trackId := range c.streamTracks {
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if time.Since(c.rtcpReceivers[trackId].lastFrameTime()) >= c.p.conf.StreamDeadAfter {
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c.log("ERR: stream is dead")
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c.conn.NetConn().Close()
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<-readDone
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break outer1
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}
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}
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case <-receiverReportTicker.C:
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for trackId := range c.streamTracks {
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channel := gortsplib.ConvTrackIdAndStreamTypeToChannel(trackId, gortsplib.StreamTypeRtcp)
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frame := c.rtcpReceivers[trackId].report()
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c.conn.WriteFrame(&gortsplib.InterleavedFrame{
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Channel: channel,
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Content: frame,
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})
|
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}
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}
|
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}
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checkStreamTicker.Stop()
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receiverReportTicker.Stop()
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|
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} else {
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readDone := make(chan error)
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go func() {
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for {
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req, err := c.conn.ReadRequest()
|
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if err != nil {
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readDone <- err
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break
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}
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err = c.handleRequest(req)
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if err != nil {
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readDone <- nil // err is not needed
|
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break
|
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}
|
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}
|
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}()
|
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|
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checkStreamTicker := time.NewTicker(_CLIENT_CHECK_STREAM_INTERVAL)
|
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receiverReportTicker := time.NewTicker(_CLIENT_RECEIVER_REPORT_INTERVAL)
|
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|
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outer2:
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for {
|
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select {
|
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case err := <-readDone:
|
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if err != nil && err != io.EOF {
|
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c.log("ERR: %s", err)
|
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}
|
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break outer2
|
|
|
|
case <-checkStreamTicker.C:
|
|
for trackId := range c.streamTracks {
|
|
if time.Since(c.rtcpReceivers[trackId].lastFrameTime()) >= c.p.conf.StreamDeadAfter {
|
|
c.log("ERR: stream is dead")
|
|
c.conn.NetConn().Close()
|
|
<-readDone
|
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break outer2
|
|
}
|
|
}
|
|
|
|
case <-receiverReportTicker.C:
|
|
for trackId := range c.streamTracks {
|
|
frame := c.rtcpReceivers[trackId].report()
|
|
c.p.rtcpl.writeChan <- &udpAddrBufPair{
|
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addr: &net.UDPAddr{
|
|
IP: c.ip(),
|
|
Zone: c.zone(),
|
|
Port: c.streamTracks[trackId].rtcpPort,
|
|
},
|
|
buf: frame,
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
checkStreamTicker.Stop()
|
|
receiverReportTicker.Stop()
|
|
}
|
|
|
|
done := make(chan struct{})
|
|
c.p.events <- programEventClientClose{done, c}
|
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<-done
|
|
|
|
for trackId := range c.streamTracks {
|
|
c.rtcpReceivers[trackId].close()
|
|
}
|
|
|
|
return false
|
|
}
|
|
|
|
func (c *serverClient) close() {
|
|
c.conn.NetConn().Close()
|
|
<-c.done
|
|
}
|
|
|
|
func (c *serverClient) writeResError(req *gortsplib.Request, code gortsplib.StatusCode, err error) {
|
|
c.log("ERR: %s", err)
|
|
|
|
header := gortsplib.Header{}
|
|
if cseq, ok := req.Header["CSeq"]; ok && len(cseq) == 1 {
|
|
header["CSeq"] = cseq
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: code,
|
|
Header: header,
|
|
})
|
|
}
|
|
|
|
func (c *serverClient) findConfForPath(path string) *ConfPath {
|
|
if pconf, ok := c.p.conf.Paths[path]; ok {
|
|
return pconf
|
|
}
|
|
|
|
if pconf, ok := c.p.conf.Paths["all"]; ok {
|
|
return pconf
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
var errAuthCritical = errors.New("auth critical")
|
|
var errAuthNotCritical = errors.New("auth not critical")
|
|
|
|
func (c *serverClient) authenticate(ips []interface{}, user string, pass string, req *gortsplib.Request) error {
|
|
// validate ip
|
|
err := func() error {
|
|
if ips == nil {
|
|
return nil
|
|
}
|
|
|
|
ip := c.ip()
|
|
if !ipEqualOrInRange(ip, ips) {
|
|
c.log("ERR: ip '%s' not allowed", ip)
|
|
return errAuthCritical
|
|
}
|
|
|
|
return nil
|
|
}()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
// validate credentials
|
|
err = func() error {
|
|
if user == "" {
|
|
return nil
|
|
}
|
|
|
|
// reset authHelper every time the credentials change
|
|
if c.authHelper == nil || c.authUser != user || c.authPass != pass {
|
|
c.authUser = user
|
|
c.authPass = pass
|
|
c.authHelper = gortsplib.NewAuthServer(user, pass, c.p.conf.authMethodsParsed)
|
|
}
|
|
|
|
err := c.authHelper.ValidateHeader(req.Header["Authorization"], req.Method, req.Url)
|
|
if err != nil {
|
|
c.authFailures += 1
|
|
|
|
// vlc with login prompt sends 4 requests:
|
|
// 1) without credentials
|
|
// 2) with password but without the username
|
|
// 3) without credentials
|
|
// 4) with password and username
|
|
// hence we must allow up to 3 failures
|
|
var retErr error
|
|
if c.authFailures > 3 {
|
|
c.log("ERR: unauthorized: %s", err)
|
|
retErr = errAuthCritical
|
|
|
|
} else if c.authFailures > 1 {
|
|
c.log("WARN: unauthorized: %s", err)
|
|
retErr = errAuthNotCritical
|
|
|
|
} else {
|
|
retErr = errAuthNotCritical
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusUnauthorized,
|
|
Header: gortsplib.Header{
|
|
"CSeq": req.Header["CSeq"],
|
|
"WWW-Authenticate": c.authHelper.GenerateHeader(),
|
|
},
|
|
})
|
|
|
|
return retErr
|
|
}
|
|
|
|
// reset authFailures after a successful login
|
|
c.authFailures = 0
|
|
|
|
return nil
|
|
}()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *serverClient) handleRequest(req *gortsplib.Request) error {
|
|
c.log(string(req.Method))
|
|
|
|
cseq, ok := req.Header["CSeq"]
|
|
if !ok || len(cseq) != 1 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("cseq missing"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
path := func() string {
|
|
ret := req.Url.Path
|
|
|
|
// remove leading slash
|
|
if len(ret) > 1 {
|
|
ret = ret[1:]
|
|
}
|
|
|
|
// strip any subpath
|
|
if n := strings.Index(ret, "/"); n >= 0 {
|
|
ret = ret[:n]
|
|
}
|
|
|
|
return ret
|
|
}()
|
|
|
|
switch req.Method {
|
|
case gortsplib.OPTIONS:
|
|
// do not check state, since OPTIONS can be requested
|
|
// in any state
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Public": []string{strings.Join([]string{
|
|
string(gortsplib.DESCRIBE),
|
|
string(gortsplib.ANNOUNCE),
|
|
string(gortsplib.SETUP),
|
|
string(gortsplib.PLAY),
|
|
string(gortsplib.RECORD),
|
|
string(gortsplib.TEARDOWN),
|
|
}, ", ")},
|
|
},
|
|
})
|
|
return nil
|
|
|
|
case gortsplib.DESCRIBE:
|
|
if c.state != _CLIENT_STATE_STARTING {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("client is in state '%s' instead of '%s'", c.state, _CLIENT_STATE_STARTING))
|
|
return errClientTerminate
|
|
}
|
|
|
|
pconf := c.findConfForPath(path)
|
|
if pconf == nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("unable to find a valid configuration for path '%s'", path))
|
|
return errClientTerminate
|
|
}
|
|
|
|
err := c.authenticate(pconf.readIpsParsed, pconf.ReadUser, pconf.ReadPass, req)
|
|
if err != nil {
|
|
if err == errAuthCritical {
|
|
return errClientTerminate
|
|
}
|
|
return nil
|
|
}
|
|
|
|
res := make(chan []byte)
|
|
c.p.events <- programEventClientDescribe{path, res}
|
|
sdp := <-res
|
|
if sdp == nil {
|
|
c.writeResError(req, gortsplib.StatusNotFound, fmt.Errorf("no one is publishing on path '%s'", path))
|
|
return errClientTerminate
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Content-Base": []string{req.Url.String() + "/"},
|
|
"Content-Type": []string{"application/sdp"},
|
|
},
|
|
Content: sdp,
|
|
})
|
|
return nil
|
|
|
|
case gortsplib.ANNOUNCE:
|
|
if c.state != _CLIENT_STATE_STARTING {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("client is in state '%s' instead of '%s'", c.state, _CLIENT_STATE_STARTING))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(path) == 0 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("path can't be empty"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
pconf := c.findConfForPath(path)
|
|
if pconf == nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("unable to find a valid configuration for path '%s'", path))
|
|
return errClientTerminate
|
|
}
|
|
|
|
err := c.authenticate(pconf.publishIpsParsed, pconf.PublishUser, pconf.PublishPass, req)
|
|
if err != nil {
|
|
if err == errAuthCritical {
|
|
return errClientTerminate
|
|
}
|
|
return nil
|
|
}
|
|
|
|
ct, ok := req.Header["Content-Type"]
|
|
if !ok || len(ct) != 1 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("Content-Type header missing"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if ct[0] != "application/sdp" {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("unsupported Content-Type '%s'", ct))
|
|
return errClientTerminate
|
|
}
|
|
|
|
sdpParsed := &sdp.SessionDescription{}
|
|
err = sdpParsed.Unmarshal(string(req.Content))
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("invalid SDP: %s", err))
|
|
return errClientTerminate
|
|
}
|
|
sdpParsed, req.Content = sdpForServer(sdpParsed)
|
|
|
|
if len(sdpParsed.MediaDescriptions) == 0 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("no tracks defined"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientAnnounce{res, c, path}
|
|
err = <-res
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, err)
|
|
return errClientTerminate
|
|
}
|
|
|
|
c.streamSdpText = req.Content
|
|
c.streamSdpParsed = sdpParsed
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
},
|
|
})
|
|
return nil
|
|
|
|
case gortsplib.SETUP:
|
|
tsRaw, ok := req.Header["Transport"]
|
|
if !ok || len(tsRaw) != 1 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header missing"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
th := gortsplib.ReadHeaderTransport(tsRaw[0])
|
|
if _, ok := th["multicast"]; ok {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("multicast is not supported"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
switch c.state {
|
|
// play
|
|
case _CLIENT_STATE_STARTING, _CLIENT_STATE_PRE_PLAY:
|
|
pconf := c.findConfForPath(path)
|
|
if pconf == nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("unable to find a valid configuration for path '%s'", path))
|
|
return errClientTerminate
|
|
}
|
|
|
|
err := c.authenticate(pconf.readIpsParsed, pconf.ReadUser, pconf.ReadPass, req)
|
|
if err != nil {
|
|
if err == errAuthCritical {
|
|
return errClientTerminate
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// play via UDP
|
|
if func() bool {
|
|
_, ok := th["RTP/AVP"]
|
|
if ok {
|
|
return true
|
|
}
|
|
_, ok = th["RTP/AVP/UDP"]
|
|
if ok {
|
|
return true
|
|
}
|
|
return false
|
|
}() {
|
|
if _, ok := c.p.conf.protocolsParsed[_STREAM_PROTOCOL_UDP]; !ok {
|
|
c.writeResError(req, gortsplib.StatusUnsupportedTransport, fmt.Errorf("UDP streaming is disabled"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
rtpPort, rtcpPort := th.GetPorts("client_port")
|
|
if rtpPort == 0 || rtcpPort == 0 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header does not have valid client ports (%s)", tsRaw[0]))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if c.path != "" && path != c.path {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("path has changed"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) > 0 && c.streamProtocol != _STREAM_PROTOCOL_UDP {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("can't receive tracks with different protocols"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientSetupPlay{res, c, path, _STREAM_PROTOCOL_UDP, rtpPort, rtcpPort}
|
|
err = <-res
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, err)
|
|
return errClientTerminate
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Transport": []string{strings.Join([]string{
|
|
"RTP/AVP/UDP",
|
|
"unicast",
|
|
fmt.Sprintf("client_port=%d-%d", rtpPort, rtcpPort),
|
|
fmt.Sprintf("server_port=%d-%d", c.p.conf.RtpPort, c.p.conf.RtcpPort),
|
|
}, ";")},
|
|
"Session": []string{"12345678"},
|
|
},
|
|
})
|
|
return nil
|
|
|
|
// play via TCP
|
|
} else if _, ok := th["RTP/AVP/TCP"]; ok {
|
|
if _, ok := c.p.conf.protocolsParsed[_STREAM_PROTOCOL_TCP]; !ok {
|
|
c.writeResError(req, gortsplib.StatusUnsupportedTransport, fmt.Errorf("TCP streaming is disabled"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if c.path != "" && path != c.path {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("path has changed"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) > 0 && c.streamProtocol != _STREAM_PROTOCOL_TCP {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("can't receive tracks with different protocols"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientSetupPlay{res, c, path, _STREAM_PROTOCOL_TCP, 0, 0}
|
|
err = <-res
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, err)
|
|
return errClientTerminate
|
|
}
|
|
|
|
interleaved := fmt.Sprintf("%d-%d", ((len(c.streamTracks) - 1) * 2), ((len(c.streamTracks)-1)*2)+1)
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Transport": []string{strings.Join([]string{
|
|
"RTP/AVP/TCP",
|
|
"unicast",
|
|
fmt.Sprintf("interleaved=%s", interleaved),
|
|
}, ";")},
|
|
"Session": []string{"12345678"},
|
|
},
|
|
})
|
|
return nil
|
|
|
|
} else {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header does not contain a valid protocol (RTP/AVP, RTP/AVP/UDP or RTP/AVP/TCP) (%s)", tsRaw[0]))
|
|
return errClientTerminate
|
|
}
|
|
|
|
// record
|
|
case _CLIENT_STATE_ANNOUNCE, _CLIENT_STATE_PRE_RECORD:
|
|
if _, ok := th["mode=record"]; !ok {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header does not contain mode=record"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
// after ANNOUNCE, c.path is already set
|
|
if path != c.path {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("path has changed"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
// record via UDP
|
|
if func() bool {
|
|
_, ok := th["RTP/AVP"]
|
|
if ok {
|
|
return true
|
|
}
|
|
_, ok = th["RTP/AVP/UDP"]
|
|
if ok {
|
|
return true
|
|
}
|
|
return false
|
|
}() {
|
|
if _, ok := c.p.conf.protocolsParsed[_STREAM_PROTOCOL_UDP]; !ok {
|
|
c.writeResError(req, gortsplib.StatusUnsupportedTransport, fmt.Errorf("UDP streaming is disabled"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
rtpPort, rtcpPort := th.GetPorts("client_port")
|
|
if rtpPort == 0 || rtcpPort == 0 {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header does not have valid client ports (%s)", tsRaw[0]))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) > 0 && c.streamProtocol != _STREAM_PROTOCOL_UDP {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("can't publish tracks with different protocols"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) >= len(c.streamSdpParsed.MediaDescriptions) {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("all the tracks have already been setup"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientSetupRecord{res, c, _STREAM_PROTOCOL_UDP, rtpPort, rtcpPort}
|
|
err := <-res
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, err)
|
|
return errClientTerminate
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Transport": []string{strings.Join([]string{
|
|
"RTP/AVP/UDP",
|
|
"unicast",
|
|
fmt.Sprintf("client_port=%d-%d", rtpPort, rtcpPort),
|
|
fmt.Sprintf("server_port=%d-%d", c.p.conf.RtpPort, c.p.conf.RtcpPort),
|
|
}, ";")},
|
|
"Session": []string{"12345678"},
|
|
},
|
|
})
|
|
return nil
|
|
|
|
// record via TCP
|
|
} else if _, ok := th["RTP/AVP/TCP"]; ok {
|
|
if _, ok := c.p.conf.protocolsParsed[_STREAM_PROTOCOL_TCP]; !ok {
|
|
c.writeResError(req, gortsplib.StatusUnsupportedTransport, fmt.Errorf("TCP streaming is disabled"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) > 0 && c.streamProtocol != _STREAM_PROTOCOL_TCP {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("can't publish tracks with different protocols"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
interleaved := th.GetValue("interleaved")
|
|
if interleaved == "" {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header does not contain the interleaved field"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
expInterleaved := fmt.Sprintf("%d-%d", 0+len(c.streamTracks)*2, 1+len(c.streamTracks)*2)
|
|
if interleaved != expInterleaved {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("wrong interleaved value, expected '%s', got '%s'", expInterleaved, interleaved))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) >= len(c.streamSdpParsed.MediaDescriptions) {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("all the tracks have already been setup"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientSetupRecord{res, c, _STREAM_PROTOCOL_TCP, 0, 0}
|
|
err := <-res
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, err)
|
|
return errClientTerminate
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Transport": []string{strings.Join([]string{
|
|
"RTP/AVP/TCP",
|
|
"unicast",
|
|
fmt.Sprintf("interleaved=%s", interleaved),
|
|
}, ";")},
|
|
"Session": []string{"12345678"},
|
|
},
|
|
})
|
|
return nil
|
|
|
|
} else {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("transport header does not contain a valid protocol (RTP/AVP, RTP/AVP/UDP or RTP/AVP/TCP) (%s)", tsRaw[0]))
|
|
return errClientTerminate
|
|
}
|
|
|
|
default:
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("client is in state '%s'", c.state))
|
|
return errClientTerminate
|
|
}
|
|
|
|
case gortsplib.PLAY:
|
|
if c.state != _CLIENT_STATE_PRE_PLAY {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("client is in state '%s' instead of '%s'", c.state, _CLIENT_STATE_PRE_PLAY))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if path != c.path {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("path has changed"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
// check publisher existence
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientPlay1{res, c}
|
|
err := <-res
|
|
if err != nil {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, err)
|
|
return errClientTerminate
|
|
}
|
|
|
|
// write response before setting state
|
|
// otherwise, in case of TCP connections, RTP packets could be sent
|
|
// before the response
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Session": []string{"12345678"},
|
|
},
|
|
})
|
|
|
|
if c.streamProtocol == _STREAM_PROTOCOL_TCP {
|
|
c.writeBuf = newDoubleBuffer(2048)
|
|
c.events = make(chan serverClientEvent)
|
|
}
|
|
|
|
// set state
|
|
res = make(chan error)
|
|
c.p.events <- programEventClientPlay2{res, c}
|
|
<-res
|
|
|
|
c.log("is receiving on path '%s', %d %s via %s", c.path, len(c.streamTracks), func() string {
|
|
if len(c.streamTracks) == 1 {
|
|
return "track"
|
|
}
|
|
return "tracks"
|
|
}(), c.streamProtocol)
|
|
|
|
return errClientChangeRunMode
|
|
|
|
case gortsplib.RECORD:
|
|
if c.state != _CLIENT_STATE_PRE_RECORD {
|
|
c.writeResError(req, gortsplib.StatusBadRequest,
|
|
fmt.Errorf("client is in state '%s' instead of '%s'", c.state, _CLIENT_STATE_PRE_RECORD))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if path != c.path {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("path has changed"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
if len(c.streamTracks) != len(c.streamSdpParsed.MediaDescriptions) {
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("not all tracks have been setup"))
|
|
return errClientTerminate
|
|
}
|
|
|
|
c.conn.WriteResponse(&gortsplib.Response{
|
|
StatusCode: gortsplib.StatusOK,
|
|
Header: gortsplib.Header{
|
|
"CSeq": cseq,
|
|
"Session": []string{"12345678"},
|
|
},
|
|
})
|
|
|
|
c.rtcpReceivers = make([]*rtcpReceiver, len(c.streamTracks))
|
|
for trackId := range c.streamTracks {
|
|
c.rtcpReceivers[trackId] = newRtcpReceiver()
|
|
}
|
|
|
|
res := make(chan error)
|
|
c.p.events <- programEventClientRecord{res, c}
|
|
<-res
|
|
|
|
c.log("is publishing on path '%s', %d %s via %s", c.path, len(c.streamTracks), func() string {
|
|
if len(c.streamTracks) == 1 {
|
|
return "track"
|
|
}
|
|
return "tracks"
|
|
}(), c.streamProtocol)
|
|
|
|
return errClientChangeRunMode
|
|
|
|
case gortsplib.TEARDOWN:
|
|
// close connection silently
|
|
return errClientTerminate
|
|
|
|
default:
|
|
c.writeResError(req, gortsplib.StatusBadRequest, fmt.Errorf("unhandled method '%s'", req.Method))
|
|
return errClientTerminate
|
|
}
|
|
}
|