mediamtx/internal/core/rtsp_server.go

454 lines
10 KiB
Go

package core
import (
"context"
"crypto/rand"
"crypto/tls"
"encoding/binary"
"fmt"
"strconv"
"strings"
"sync"
"time"
"github.com/aler9/gortsplib"
"github.com/aler9/gortsplib/pkg/base"
"github.com/aler9/gortsplib/pkg/headers"
"github.com/aler9/gortsplib/pkg/liberrors"
"github.com/aler9/rtsp-simple-server/internal/conf"
"github.com/aler9/rtsp-simple-server/internal/externalcmd"
"github.com/aler9/rtsp-simple-server/internal/logger"
)
type rtspServerAPISessionsListItem struct {
RemoteAddr string `json:"remoteAddr"`
State string `json:"state"`
}
type rtspServerAPISessionsListData struct {
Items map[string]rtspServerAPISessionsListItem `json:"items"`
}
type rtspServerAPISessionsListRes struct {
data *rtspServerAPISessionsListData
err error
}
type rtspServerAPISessionsListReq struct{}
type rtspServerAPISessionsKickRes struct {
err error
}
type rtspServerAPISessionsKickReq struct {
id string
}
type rtspServerParent interface {
Log(logger.Level, string, ...interface{})
}
type rtspServer struct {
externalAuthenticationURL string
authMethods []headers.AuthMethod
readTimeout conf.StringDuration
isTLS bool
rtspAddress string
protocols map[conf.Protocol]struct{}
runOnConnect string
runOnConnectRestart bool
externalCmdPool *externalcmd.Pool
metrics *metrics
pathManager *pathManager
parent rtspServerParent
ctx context.Context
ctxCancel func()
wg sync.WaitGroup
srv *gortsplib.Server
mutex sync.RWMutex
conns map[*gortsplib.ServerConn]*rtspConn
sessions map[*gortsplib.ServerSession]*rtspSession
}
func newRTSPServer(
parentCtx context.Context,
externalAuthenticationURL string,
address string,
authMethods []headers.AuthMethod,
readTimeout conf.StringDuration,
writeTimeout conf.StringDuration,
readBufferCount int,
useUDP bool,
useMulticast bool,
rtpAddress string,
rtcpAddress string,
multicastIPRange string,
multicastRTPPort int,
multicastRTCPPort int,
isTLS bool,
serverCert string,
serverKey string,
rtspAddress string,
protocols map[conf.Protocol]struct{},
runOnConnect string,
runOnConnectRestart bool,
externalCmdPool *externalcmd.Pool,
metrics *metrics,
pathManager *pathManager,
parent rtspServerParent,
) (*rtspServer, error) {
ctx, ctxCancel := context.WithCancel(parentCtx)
s := &rtspServer{
externalAuthenticationURL: externalAuthenticationURL,
authMethods: authMethods,
readTimeout: readTimeout,
isTLS: isTLS,
rtspAddress: rtspAddress,
protocols: protocols,
externalCmdPool: externalCmdPool,
metrics: metrics,
pathManager: pathManager,
parent: parent,
ctx: ctx,
ctxCancel: ctxCancel,
conns: make(map[*gortsplib.ServerConn]*rtspConn),
sessions: make(map[*gortsplib.ServerSession]*rtspSession),
}
s.srv = &gortsplib.Server{
Handler: s,
ReadTimeout: time.Duration(readTimeout),
WriteTimeout: time.Duration(writeTimeout),
ReadBufferCount: readBufferCount,
WriteBufferCount: readBufferCount,
RTSPAddress: address,
}
if useUDP {
s.srv.UDPRTPAddress = rtpAddress
s.srv.UDPRTCPAddress = rtcpAddress
}
if useMulticast {
s.srv.MulticastIPRange = multicastIPRange
s.srv.MulticastRTPPort = multicastRTPPort
s.srv.MulticastRTCPPort = multicastRTCPPort
}
if isTLS {
cert, err := tls.LoadX509KeyPair(serverCert, serverKey)
if err != nil {
return nil, err
}
s.srv.TLSConfig = &tls.Config{Certificates: []tls.Certificate{cert}}
}
err := s.srv.Start()
if err != nil {
return nil, err
}
var temp []string
temp = append(temp, fmt.Sprintf("%s (TCP)", address))
if s.srv.UDPRTPAddress != "" {
temp = append(temp, fmt.Sprintf("%s (UDP/RTP)", s.srv.UDPRTPAddress))
}
if s.srv.UDPRTCPAddress != "" {
temp = append(temp, fmt.Sprintf("%s (UDP/RTCP)", s.srv.UDPRTCPAddress))
}
s.log(logger.Info, "listener opened on "+strings.Join(temp, ", "))
if s.metrics != nil {
if !isTLS {
s.metrics.onRTSPServerSet(s)
} else {
s.metrics.onRTSPSServerSet(s)
}
}
s.wg.Add(1)
go s.run()
return s, nil
}
func (s *rtspServer) log(level logger.Level, format string, args ...interface{}) {
label := func() string {
if s.isTLS {
return "RTSPS"
}
return "RTSP"
}()
s.parent.Log(level, "[%s] "+format, append([]interface{}{label}, args...)...)
}
func (s *rtspServer) close() {
s.log(logger.Info, "listener is closing")
s.ctxCancel()
s.wg.Wait()
}
func (s *rtspServer) run() {
defer s.wg.Done()
serverErr := make(chan error)
go func() {
serverErr <- s.srv.Wait()
}()
outer:
select {
case err := <-serverErr:
s.log(logger.Error, "%s", err)
break outer
case <-s.ctx.Done():
s.srv.Close()
<-serverErr
break outer
}
s.ctxCancel()
if s.metrics != nil {
if !s.isTLS {
s.metrics.onRTSPServerSet(nil)
} else {
s.metrics.onRTSPSServerSet(nil)
}
}
}
func (s *rtspServer) newSessionID() (string, error) {
for {
b := make([]byte, 4)
_, err := rand.Read(b)
if err != nil {
return "", err
}
u := binary.LittleEndian.Uint32(b)
u %= 899999999
u += 100000000
id := strconv.FormatUint(uint64(u), 10)
alreadyPresent := func() bool {
for _, s := range s.sessions {
if s.ID() == id {
return true
}
}
return false
}()
if !alreadyPresent {
return id, nil
}
}
}
// OnConnOpen implements gortsplib.ServerHandlerOnConnOpen.
func (s *rtspServer) OnConnOpen(ctx *gortsplib.ServerHandlerOnConnOpenCtx) {
c := newRTSPConn(
s.externalAuthenticationURL,
s.rtspAddress,
s.authMethods,
s.readTimeout,
s.runOnConnect,
s.runOnConnectRestart,
s.externalCmdPool,
s.pathManager,
ctx.Conn,
s)
s.mutex.Lock()
s.conns[ctx.Conn] = c
s.mutex.Unlock()
}
// OnConnClose implements gortsplib.ServerHandlerOnConnClose.
func (s *rtspServer) OnConnClose(ctx *gortsplib.ServerHandlerOnConnCloseCtx) {
s.mutex.Lock()
c := s.conns[ctx.Conn]
delete(s.conns, ctx.Conn)
s.mutex.Unlock()
c.onClose(ctx.Error)
}
// OnRequest implements gortsplib.ServerHandlerOnRequest.
func (s *rtspServer) OnRequest(sc *gortsplib.ServerConn, req *base.Request) {
s.mutex.Lock()
c := s.conns[sc]
s.mutex.Unlock()
c.onRequest(req)
}
// OnResponse implements gortsplib.ServerHandlerOnResponse.
func (s *rtspServer) OnResponse(sc *gortsplib.ServerConn, res *base.Response) {
s.mutex.Lock()
c := s.conns[sc]
s.mutex.Unlock()
c.OnResponse(res)
}
// OnSessionOpen implements gortsplib.ServerHandlerOnSessionOpen.
func (s *rtspServer) OnSessionOpen(ctx *gortsplib.ServerHandlerOnSessionOpenCtx) {
s.mutex.Lock()
id, _ := s.newSessionID()
se := newRTSPSession(
s.isTLS,
s.protocols,
id,
ctx.Session,
ctx.Conn,
s.externalCmdPool,
s.pathManager,
s)
s.sessions[ctx.Session] = se
s.mutex.Unlock()
}
// OnSessionClose implements gortsplib.ServerHandlerOnSessionClose.
func (s *rtspServer) OnSessionClose(ctx *gortsplib.ServerHandlerOnSessionCloseCtx) {
s.mutex.Lock()
se := s.sessions[ctx.Session]
delete(s.sessions, ctx.Session)
s.mutex.Unlock()
if se != nil {
se.onClose(ctx.Error)
}
}
// OnDescribe implements gortsplib.ServerHandlerOnDescribe.
func (s *rtspServer) OnDescribe(ctx *gortsplib.ServerHandlerOnDescribeCtx,
) (*base.Response, *gortsplib.ServerStream, error) {
s.mutex.RLock()
c := s.conns[ctx.Conn]
s.mutex.RUnlock()
return c.onDescribe(ctx)
}
// OnAnnounce implements gortsplib.ServerHandlerOnAnnounce.
func (s *rtspServer) OnAnnounce(ctx *gortsplib.ServerHandlerOnAnnounceCtx) (*base.Response, error) {
s.mutex.RLock()
c := s.conns[ctx.Conn]
se := s.sessions[ctx.Session]
s.mutex.RUnlock()
return se.onAnnounce(c, ctx)
}
// OnSetup implements gortsplib.ServerHandlerOnSetup.
func (s *rtspServer) OnSetup(ctx *gortsplib.ServerHandlerOnSetupCtx) (*base.Response, *gortsplib.ServerStream, error) {
s.mutex.RLock()
c := s.conns[ctx.Conn]
se := s.sessions[ctx.Session]
s.mutex.RUnlock()
return se.onSetup(c, ctx)
}
// OnPlay implements gortsplib.ServerHandlerOnPlay.
func (s *rtspServer) OnPlay(ctx *gortsplib.ServerHandlerOnPlayCtx) (*base.Response, error) {
s.mutex.RLock()
se := s.sessions[ctx.Session]
s.mutex.RUnlock()
return se.onPlay(ctx)
}
// OnRecord implements gortsplib.ServerHandlerOnRecord.
func (s *rtspServer) OnRecord(ctx *gortsplib.ServerHandlerOnRecordCtx) (*base.Response, error) {
s.mutex.RLock()
se := s.sessions[ctx.Session]
s.mutex.RUnlock()
return se.onRecord(ctx)
}
// OnPause implements gortsplib.ServerHandlerOnPause.
func (s *rtspServer) OnPause(ctx *gortsplib.ServerHandlerOnPauseCtx) (*base.Response, error) {
s.mutex.RLock()
se := s.sessions[ctx.Session]
s.mutex.RUnlock()
return se.onPause(ctx)
}
// OnPacketRTP implements gortsplib.ServerHandlerOnPacket.
func (s *rtspServer) OnPacketRTP(ctx *gortsplib.ServerHandlerOnPacketRTPCtx) {
s.mutex.RLock()
se := s.sessions[ctx.Session]
s.mutex.RUnlock()
se.onPacketRTP(ctx)
}
// onAPISessionsList is called by api and metrics.
func (s *rtspServer) onAPISessionsList(req rtspServerAPISessionsListReq) rtspServerAPISessionsListRes {
select {
case <-s.ctx.Done():
return rtspServerAPISessionsListRes{err: fmt.Errorf("terminated")}
default:
}
s.mutex.RLock()
defer s.mutex.RUnlock()
data := &rtspServerAPISessionsListData{
Items: make(map[string]rtspServerAPISessionsListItem),
}
for _, s := range s.sessions {
data.Items[s.ID()] = rtspServerAPISessionsListItem{
RemoteAddr: s.RemoteAddr().String(),
State: func() string {
switch s.safeState() {
case gortsplib.ServerSessionStatePrePlay,
gortsplib.ServerSessionStatePlay:
return "read"
case gortsplib.ServerSessionStatePreRecord,
gortsplib.ServerSessionStateRecord:
return "publish"
}
return "idle"
}(),
}
}
return rtspServerAPISessionsListRes{data: data}
}
// onAPISessionsKick is called by api.
func (s *rtspServer) onAPISessionsKick(req rtspServerAPISessionsKickReq) rtspServerAPISessionsKickRes {
select {
case <-s.ctx.Done():
return rtspServerAPISessionsKickRes{err: fmt.Errorf("terminated")}
default:
}
s.mutex.RLock()
defer s.mutex.RUnlock()
for key, se := range s.sessions {
if se.ID() == req.id {
se.close()
delete(s.sessions, key)
se.onClose(liberrors.ErrServerTerminated{})
return rtspServerAPISessionsKickRes{}
}
}
return rtspServerAPISessionsKickRes{err: fmt.Errorf("not found")}
}