335 lines
7.5 KiB
Go
335 lines
7.5 KiB
Go
package core
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import (
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"context"
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"crypto/rand"
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"crypto/tls"
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"encoding/binary"
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"strconv"
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"sync"
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"time"
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"github.com/aler9/gortsplib"
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"github.com/aler9/gortsplib/pkg/base"
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"github.com/aler9/rtsp-simple-server/internal/conf"
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"github.com/aler9/rtsp-simple-server/internal/logger"
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)
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func newSessionVisualID(sessions map[*gortsplib.ServerSession]*rtspSession) (string, error) {
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for {
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b := make([]byte, 4)
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_, err := rand.Read(b)
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if err != nil {
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return "", err
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}
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id := strconv.FormatUint(uint64(binary.LittleEndian.Uint32(b)), 10)
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alreadyPresent := func() bool {
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for _, s := range sessions {
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if s.VisualID() == id {
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return true
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}
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}
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return false
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}()
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if !alreadyPresent {
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return id, nil
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}
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}
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}
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type rtspServerParent interface {
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Log(logger.Level, string, ...interface{})
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}
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type rtspServer struct {
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readTimeout time.Duration
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isTLS bool
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rtspAddress string
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protocols map[conf.Protocol]struct{}
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runOnConnect string
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runOnConnectRestart bool
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stats *stats
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pathManager *pathManager
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parent rtspServerParent
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ctx context.Context
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ctxCancel func()
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wg sync.WaitGroup
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srv *gortsplib.Server
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mutex sync.RWMutex
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conns map[*gortsplib.ServerConn]*rtspConn
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sessions map[*gortsplib.ServerSession]*rtspSession
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}
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func newRTSPServer(
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parentCtx context.Context,
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address string,
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readTimeout time.Duration,
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writeTimeout time.Duration,
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readBufferCount int,
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readBufferSize int,
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useUDP bool,
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useMulticast bool,
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rtpAddress string,
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rtcpAddress string,
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multicastIPRange string,
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multicastRTPPort int,
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multicastRTCPPort int,
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isTLS bool,
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serverCert string,
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serverKey string,
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rtspAddress string,
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protocols map[conf.Protocol]struct{},
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runOnConnect string,
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runOnConnectRestart bool,
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stats *stats,
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pathManager *pathManager,
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parent rtspServerParent) (*rtspServer, error) {
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ctx, ctxCancel := context.WithCancel(parentCtx)
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s := &rtspServer{
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readTimeout: readTimeout,
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isTLS: isTLS,
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rtspAddress: rtspAddress,
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protocols: protocols,
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stats: stats,
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pathManager: pathManager,
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parent: parent,
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ctx: ctx,
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ctxCancel: ctxCancel,
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conns: make(map[*gortsplib.ServerConn]*rtspConn),
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sessions: make(map[*gortsplib.ServerSession]*rtspSession),
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}
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s.srv = &gortsplib.Server{
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Handler: s,
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ReadTimeout: readTimeout,
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WriteTimeout: writeTimeout,
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ReadBufferCount: readBufferCount,
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ReadBufferSize: readBufferSize,
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}
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if useUDP {
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s.srv.UDPRTPAddress = rtpAddress
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s.srv.UDPRTCPAddress = rtcpAddress
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}
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if useMulticast {
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s.srv.MulticastIPRange = multicastIPRange
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s.srv.MulticastRTPPort = multicastRTPPort
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s.srv.MulticastRTCPPort = multicastRTCPPort
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}
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if isTLS {
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cert, err := tls.LoadX509KeyPair(serverCert, serverKey)
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if err != nil {
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return nil, err
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}
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s.srv.TLSConfig = &tls.Config{Certificates: []tls.Certificate{cert}}
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}
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err := s.srv.Start(address)
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if err != nil {
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return nil, err
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}
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if s.srv.UDPRTPAddress != "" {
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s.Log(logger.Info, "UDP/RTP listener opened on %s", s.srv.UDPRTPAddress)
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}
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if s.srv.UDPRTCPAddress != "" {
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s.Log(logger.Info, "UDP/RTCP listener opened on %s", s.srv.UDPRTCPAddress)
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}
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s.Log(logger.Info, "TCP listener opened on %s", address)
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s.wg.Add(1)
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go s.run()
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return s, nil
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}
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func (s *rtspServer) Log(level logger.Level, format string, args ...interface{}) {
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label := func() string {
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if s.isTLS {
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return "RTSPS"
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}
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return "RTSP"
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}()
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s.parent.Log(level, "[%s] "+format, append([]interface{}{label}, args...)...)
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}
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func (s *rtspServer) close() {
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s.ctxCancel()
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s.wg.Wait()
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}
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func (s *rtspServer) run() {
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defer s.wg.Done()
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s.wg.Add(1)
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serverErr := make(chan error)
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go func() {
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defer s.wg.Done()
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err := s.srv.Wait()
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select {
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case serverErr <- err:
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case <-s.ctx.Done():
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}
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}()
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outer:
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select {
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case err := <-serverErr:
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s.Log(logger.Warn, "ERR: %s", err)
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break outer
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case <-s.ctx.Done():
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break outer
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}
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s.ctxCancel()
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s.srv.Close()
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}
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// OnConnOpen implements gortsplib.ServerHandlerOnConnOpen.
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func (s *rtspServer) OnConnOpen(ctx *gortsplib.ServerHandlerOnConnOpenCtx) {
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c := newRTSPConn(
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s.rtspAddress,
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s.readTimeout,
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s.runOnConnect,
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s.runOnConnectRestart,
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s.pathManager,
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s.stats,
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ctx.Conn,
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s)
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s.mutex.Lock()
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s.conns[ctx.Conn] = c
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s.mutex.Unlock()
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}
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// OnConnClose implements gortsplib.ServerHandlerOnConnClose.
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func (s *rtspServer) OnConnClose(ctx *gortsplib.ServerHandlerOnConnCloseCtx) {
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s.mutex.Lock()
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c := s.conns[ctx.Conn]
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delete(s.conns, ctx.Conn)
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s.mutex.Unlock()
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c.ParentClose(ctx.Error)
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}
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// OnRequest implements gortsplib.ServerHandlerOnRequest.
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func (s *rtspServer) OnRequest(sc *gortsplib.ServerConn, req *base.Request) {
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s.mutex.Lock()
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c := s.conns[sc]
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s.mutex.Unlock()
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c.OnRequest(req)
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}
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// OnResponse implements gortsplib.ServerHandlerOnResponse.
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func (s *rtspServer) OnResponse(sc *gortsplib.ServerConn, res *base.Response) {
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s.mutex.Lock()
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c := s.conns[sc]
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s.mutex.Unlock()
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c.OnResponse(res)
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}
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// OnSessionOpen implements gortsplib.ServerHandlerOnSessionOpen.
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func (s *rtspServer) OnSessionOpen(ctx *gortsplib.ServerHandlerOnSessionOpenCtx) {
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s.mutex.Lock()
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// do not use ss.ID() in logs, since it allows to take ownership of a session
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// use a new random ID
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visualID, _ := newSessionVisualID(s.sessions)
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se := newRTSPSession(
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s.rtspAddress,
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s.protocols,
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visualID,
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ctx.Session,
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ctx.Conn,
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s.pathManager,
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s)
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s.sessions[ctx.Session] = se
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s.mutex.Unlock()
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}
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// OnSessionClose implements gortsplib.ServerHandlerOnSessionClose.
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func (s *rtspServer) OnSessionClose(ctx *gortsplib.ServerHandlerOnSessionCloseCtx) {
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s.mutex.Lock()
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se := s.sessions[ctx.Session]
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delete(s.sessions, ctx.Session)
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s.mutex.Unlock()
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se.ParentClose()
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}
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// OnDescribe implements gortsplib.ServerHandlerOnDescribe.
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func (s *rtspServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx) (*base.Response, *gortsplib.ServerStream, error) {
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s.mutex.RLock()
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c := s.conns[ctx.Conn]
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s.mutex.RUnlock()
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return c.OnDescribe(ctx)
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}
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// OnAnnounce implements gortsplib.ServerHandlerOnAnnounce.
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func (s *rtspServer) OnAnnounce(ctx *gortsplib.ServerHandlerOnAnnounceCtx) (*base.Response, error) {
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s.mutex.RLock()
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c := s.conns[ctx.Conn]
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se := s.sessions[ctx.Session]
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s.mutex.RUnlock()
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return se.OnAnnounce(c, ctx)
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}
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// OnSetup implements gortsplib.ServerHandlerOnSetup.
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func (s *rtspServer) OnSetup(ctx *gortsplib.ServerHandlerOnSetupCtx) (*base.Response, *gortsplib.ServerStream, error) {
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s.mutex.RLock()
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c := s.conns[ctx.Conn]
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se := s.sessions[ctx.Session]
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s.mutex.RUnlock()
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return se.OnSetup(c, ctx)
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}
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// OnPlay implements gortsplib.ServerHandlerOnPlay.
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func (s *rtspServer) OnPlay(ctx *gortsplib.ServerHandlerOnPlayCtx) (*base.Response, error) {
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s.mutex.RLock()
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se := s.sessions[ctx.Session]
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s.mutex.RUnlock()
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return se.OnPlay(ctx)
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}
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// OnRecord implements gortsplib.ServerHandlerOnRecord.
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func (s *rtspServer) OnRecord(ctx *gortsplib.ServerHandlerOnRecordCtx) (*base.Response, error) {
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s.mutex.RLock()
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se := s.sessions[ctx.Session]
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s.mutex.RUnlock()
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return se.OnRecord(ctx)
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}
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// OnPause implements gortsplib.ServerHandlerOnPause.
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func (s *rtspServer) OnPause(ctx *gortsplib.ServerHandlerOnPauseCtx) (*base.Response, error) {
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s.mutex.RLock()
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se := s.sessions[ctx.Session]
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s.mutex.RUnlock()
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return se.OnPause(ctx)
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}
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// OnFrame implements gortsplib.ServerHandlerOnFrame.
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func (s *rtspServer) OnFrame(ctx *gortsplib.ServerHandlerOnFrameCtx) {
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s.mutex.RLock()
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se := s.sessions[ctx.Session]
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s.mutex.RUnlock()
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se.OnIncomingFrame(ctx)
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}
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