mirror of
https://github.com/bluenviron/mediamtx.git
synced 2026-01-09 11:52:02 -08:00
713 lines
16 KiB
Go
713 lines
16 KiB
Go
package client
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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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"strconv"
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"strings"
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"sync"
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"sync/atomic"
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"time"
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"github.com/aler9/gortsplib"
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"github.com/aler9/gortsplib/pkg/auth"
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"github.com/aler9/gortsplib/pkg/base"
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"github.com/aler9/gortsplib/pkg/headers"
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"github.com/aler9/rtsp-simple-server/internal/conf"
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"github.com/aler9/rtsp-simple-server/internal/externalcmd"
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"github.com/aler9/rtsp-simple-server/internal/logger"
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"github.com/aler9/rtsp-simple-server/internal/stats"
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)
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const (
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sessionID = "12345678"
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pauseAfterAuthError = 2 * time.Second
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)
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// ErrNoOnePublishing is a "no one is publishing" error.
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type ErrNoOnePublishing struct {
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PathName string
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}
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// Error implements the error interface.
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func (e ErrNoOnePublishing) Error() string {
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return fmt.Sprintf("no one is publishing to path '%s'", e.PathName)
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}
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// DescribeRes is a client describe response.
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type DescribeRes struct {
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SDP []byte
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Redirect string
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Err error
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}
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// DescribeReq is a client describe request.
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type DescribeReq struct {
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Client *Client
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PathName string
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Req *base.Request
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Res chan DescribeRes
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}
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// AnnounceRes is a client announce response.
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type AnnounceRes struct {
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Path Path
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Err error
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}
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// AnnounceReq is a client announce request.
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type AnnounceReq struct {
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Client *Client
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PathName string
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Tracks gortsplib.Tracks
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Req *base.Request
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Res chan AnnounceRes
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}
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// SetupPlayRes is a setup/play response.
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type SetupPlayRes struct {
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Path Path
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Err error
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}
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// SetupPlayReq is a setup/play request.
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type SetupPlayReq struct {
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Client *Client
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PathName string
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TrackID int
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Req *base.Request
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Res chan SetupPlayRes
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}
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// RemoveReq is a remove request.
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type RemoveReq struct {
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Client *Client
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Res chan struct{}
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}
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// PlayReq is a play request.
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type PlayReq struct {
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Client *Client
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Res chan struct{}
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}
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// RecordReq is a record request.
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type RecordReq struct {
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Client *Client
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Res chan struct{}
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}
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// PauseReq is a pause request.
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type PauseReq struct {
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Client *Client
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Res chan struct{}
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}
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// Path is implemented by path.Path.
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type Path interface {
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Name() string
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SourceTrackCount() int
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Conf() *conf.PathConf
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OnClientRemove(RemoveReq)
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OnClientPlay(PlayReq)
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OnClientRecord(RecordReq)
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OnClientPause(PauseReq)
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OnFrame(int, gortsplib.StreamType, []byte)
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}
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// Parent is implemented by clientman.ClientMan.
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type Parent interface {
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Log(logger.Level, string, ...interface{})
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OnClientClose(*Client)
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OnClientDescribe(DescribeReq)
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OnClientAnnounce(AnnounceReq)
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OnClientSetupPlay(SetupPlayReq)
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}
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// Client is a RTSP
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type Client struct {
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rtspPort int
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readTimeout time.Duration
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runOnConnect string
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runOnConnectRestart bool
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protocols map[gortsplib.StreamProtocol]struct{}
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wg *sync.WaitGroup
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stats *stats.Stats
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conn *gortsplib.ServerConn
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parent Parent
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path Path
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authUser string
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authPass string
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authValidator *auth.Validator
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authFailures int
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onReadCmd *externalcmd.Cmd
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onPublishCmd *externalcmd.Cmd
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// in
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terminate chan struct{}
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}
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// New allocates a Client.
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func New(
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isTLS bool,
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rtspPort int,
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readTimeout time.Duration,
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runOnConnect string,
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runOnConnectRestart bool,
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protocols map[gortsplib.StreamProtocol]struct{},
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wg *sync.WaitGroup,
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stats *stats.Stats,
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conn *gortsplib.ServerConn,
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parent Parent) *Client {
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c := &Client{
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rtspPort: rtspPort,
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readTimeout: readTimeout,
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runOnConnect: runOnConnect,
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runOnConnectRestart: runOnConnectRestart,
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protocols: protocols,
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wg: wg,
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stats: stats,
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conn: conn,
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parent: parent,
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terminate: make(chan struct{}),
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}
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atomic.AddInt64(c.stats.CountClients, 1)
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c.log(logger.Info, "connected (%s)", func() string {
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if isTLS {
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return "encrypted"
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}
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return "plain"
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}())
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c.wg.Add(1)
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go c.run()
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return c
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}
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// Close closes a Client.
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func (c *Client) Close() {
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atomic.AddInt64(c.stats.CountClients, -1)
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close(c.terminate)
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}
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// IsSource implements path.source.
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func (c *Client) IsSource() {}
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func (c *Client) log(level logger.Level, format string, args ...interface{}) {
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c.parent.Log(level, "[client %s] "+format, append([]interface{}{c.conn.NetConn().RemoteAddr().String()}, args...)...)
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}
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func (c *Client) ip() net.IP {
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return c.conn.NetConn().RemoteAddr().(*net.TCPAddr).IP
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}
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var errTerminated = errors.New("terminated")
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func (c *Client) run() {
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defer c.wg.Done()
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defer c.log(logger.Info, "disconnected")
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if c.runOnConnect != "" {
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onConnectCmd := externalcmd.New(c.runOnConnect, c.runOnConnectRestart, externalcmd.Environment{
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Path: "",
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Port: strconv.FormatInt(int64(c.rtspPort), 10),
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})
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defer onConnectCmd.Close()
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}
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onRequest := func(req *base.Request) {
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c.log(logger.Debug, "[c->s] %v", req)
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}
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onResponse := func(res *base.Response) {
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c.log(logger.Debug, "[s->c] %v", res)
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}
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onDescribe := func(req *base.Request) (*base.Response, error) {
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reqPath, ok := req.URL.RTSPPath()
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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resc := make(chan DescribeRes)
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c.parent.OnClientDescribe(DescribeReq{c, reqPath, req, resc})
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res := <-resc
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if res.Err != nil {
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switch terr := res.Err.(type) {
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case errAuthNotCritical:
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return terr.Response, nil
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case errAuthCritical:
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// wait some seconds to stop brute force attacks
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select {
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case <-time.After(pauseAfterAuthError):
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case <-c.terminate:
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}
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return terr.Response, errTerminated
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case ErrNoOnePublishing:
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return &base.Response{
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StatusCode: base.StatusNotFound,
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}, res.Err
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default:
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, res.Err
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}
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}
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if res.Redirect != "" {
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return &base.Response{
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StatusCode: base.StatusMovedPermanently,
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Header: base.Header{
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"Location": base.HeaderValue{res.Redirect},
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},
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}, nil
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}
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return &base.Response{
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StatusCode: base.StatusOK,
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Header: base.Header{
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"Content-Base": base.HeaderValue{req.URL.String() + "/"},
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"Content-Type": base.HeaderValue{"application/sdp"},
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},
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Body: res.SDP,
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}, nil
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}
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onAnnounce := func(req *base.Request, tracks gortsplib.Tracks) (*base.Response, error) {
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reqPath, ok := req.URL.RTSPPath()
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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resc := make(chan AnnounceRes)
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c.parent.OnClientAnnounce(AnnounceReq{c, reqPath, tracks, req, resc})
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res := <-resc
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if res.Err != nil {
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switch terr := res.Err.(type) {
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case errAuthNotCritical:
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return terr.Response, nil
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case errAuthCritical:
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// wait some seconds to stop brute force attacks
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select {
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case <-time.After(pauseAfterAuthError):
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case <-c.terminate:
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}
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return terr.Response, errTerminated
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default:
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, res.Err
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}
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}
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c.path = res.Path
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return &base.Response{
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StatusCode: base.StatusOK,
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}, nil
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}
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onSetup := func(req *base.Request, th *headers.Transport, trackID int) (*base.Response, error) {
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if th.Protocol == gortsplib.StreamProtocolUDP {
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if _, ok := c.protocols[gortsplib.StreamProtocolUDP]; !ok {
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return &base.Response{
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StatusCode: base.StatusUnsupportedTransport,
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}, nil
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}
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} else {
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if _, ok := c.protocols[gortsplib.StreamProtocolTCP]; !ok {
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return &base.Response{
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StatusCode: base.StatusUnsupportedTransport,
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}, nil
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}
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}
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switch c.conn.State() {
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case gortsplib.ServerConnStateInitial, gortsplib.ServerConnStatePrePlay: // play
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pathAndQuery, ok := req.URL.RTSPPathAndQuery()
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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_, pathAndQuery, ok = base.PathSplitControlAttribute(pathAndQuery)
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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reqPath, _ := base.PathSplitQuery(pathAndQuery)
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if c.path != nil && reqPath != c.path.Name() {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("path has changed, was '%s', now is '%s'", c.path.Name(), reqPath)
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}
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resc := make(chan SetupPlayRes)
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c.parent.OnClientSetupPlay(SetupPlayReq{c, reqPath, trackID, req, resc})
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res := <-resc
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if res.Err != nil {
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switch terr := res.Err.(type) {
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case errAuthNotCritical:
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return terr.Response, nil
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case errAuthCritical:
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// wait some seconds to stop brute force attacks
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select {
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case <-time.After(pauseAfterAuthError):
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case <-c.terminate:
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}
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return terr.Response, errTerminated
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case ErrNoOnePublishing:
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return &base.Response{
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StatusCode: base.StatusNotFound,
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}, res.Err
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default:
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, res.Err
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}
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}
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c.path = res.Path
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default: // record
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reqPathAndQuery, ok := req.URL.RTSPPathAndQuery()
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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if !strings.HasPrefix(reqPathAndQuery, c.path.Name()) {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path: must begin with '%s', but is '%s'",
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c.path.Name(), reqPathAndQuery)
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}
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}
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return &base.Response{
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StatusCode: base.StatusOK,
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Header: base.Header{
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"Session": base.HeaderValue{sessionID},
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},
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}, nil
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}
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onPlay := func(req *base.Request) (*base.Response, error) {
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if c.conn.State() == gortsplib.ServerConnStatePrePlay {
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reqPath, ok := req.URL.RTSPPath()
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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// path can end with a slash, remove it
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reqPath = strings.TrimSuffix(reqPath, "/")
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if reqPath != c.path.Name() {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("path has changed, was '%s', now is '%s'", c.path.Name(), reqPath)
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}
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c.startPlay()
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}
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return &base.Response{
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StatusCode: base.StatusOK,
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Header: base.Header{
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"Session": base.HeaderValue{sessionID},
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},
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}, nil
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}
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onRecord := func(req *base.Request) (*base.Response, error) {
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reqPath, ok := req.URL.RTSPPath()
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if !ok {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("invalid path (%s)", req.URL)
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}
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// path can end with a slash, remove it
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reqPath = strings.TrimSuffix(reqPath, "/")
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if reqPath != c.path.Name() {
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return &base.Response{
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StatusCode: base.StatusBadRequest,
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}, fmt.Errorf("path has changed, was '%s', now is '%s'", c.path.Name(), reqPath)
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}
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c.startRecord()
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return &base.Response{
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StatusCode: base.StatusOK,
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Header: base.Header{
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"Session": base.HeaderValue{sessionID},
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},
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}, nil
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}
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onPause := func(req *base.Request) (*base.Response, error) {
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switch c.conn.State() {
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case gortsplib.ServerConnStatePlay:
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c.stopPlay()
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res := make(chan struct{})
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c.path.OnClientPause(PauseReq{c, res})
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<-res
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case gortsplib.ServerConnStateRecord:
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c.stopRecord()
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res := make(chan struct{})
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c.path.OnClientPause(PauseReq{c, res})
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<-res
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}
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return &base.Response{
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StatusCode: base.StatusOK,
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Header: base.Header{
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"Session": base.HeaderValue{sessionID},
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},
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}, nil
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}
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onFrame := func(trackID int, streamType gortsplib.StreamType, payload []byte) {
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if c.conn.State() != gortsplib.ServerConnStateRecord {
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return
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}
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c.path.OnFrame(trackID, streamType, payload)
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}
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readDone := c.conn.Read(gortsplib.ServerConnReadHandlers{
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OnRequest: onRequest,
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OnResponse: onResponse,
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OnDescribe: onDescribe,
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OnAnnounce: onAnnounce,
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OnSetup: onSetup,
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OnPlay: onPlay,
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OnRecord: onRecord,
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OnPause: onPause,
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OnFrame: onFrame,
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})
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select {
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case err := <-readDone:
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c.conn.Close()
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if err != io.EOF && err != gortsplib.ErrServerTeardown && err != errTerminated {
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c.log(logger.Info, "ERR: %s", err)
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}
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switch c.conn.State() {
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case gortsplib.ServerConnStatePlay:
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c.stopPlay()
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case gortsplib.ServerConnStateRecord:
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c.stopRecord()
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}
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if c.path != nil {
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res := make(chan struct{})
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c.path.OnClientRemove(RemoveReq{c, res})
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<-res
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c.path = nil
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}
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c.parent.OnClientClose(c)
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<-c.terminate
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case <-c.terminate:
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c.conn.Close()
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<-readDone
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switch c.conn.State() {
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case gortsplib.ServerConnStatePlay:
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c.stopPlay()
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case gortsplib.ServerConnStateRecord:
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c.stopRecord()
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}
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if c.path != nil {
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res := make(chan struct{})
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c.path.OnClientRemove(RemoveReq{c, res})
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<-res
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c.path = nil
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}
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}
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}
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type errAuthNotCritical struct {
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*base.Response
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}
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func (errAuthNotCritical) Error() string {
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return "auth not critical"
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}
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type errAuthCritical struct {
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*base.Response
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}
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func (errAuthCritical) Error() string {
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return "auth critical"
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}
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|
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// Authenticate performs an authentication.
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func (c *Client) Authenticate(authMethods []headers.AuthMethod, ips []interface{},
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user string, pass string, req *base.Request, altURL *base.URL) error {
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// validate ip
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if ips != nil {
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ip := c.ip()
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|
|
if !ipEqualOrInRange(ip, ips) {
|
|
c.log(logger.Info, "ERR: ip '%s' not allowed", ip)
|
|
|
|
return errAuthCritical{&base.Response{
|
|
StatusCode: base.StatusUnauthorized,
|
|
}}
|
|
}
|
|
}
|
|
|
|
// validate user
|
|
if user != "" {
|
|
// reset authValidator every time the credentials change
|
|
if c.authValidator == nil || c.authUser != user || c.authPass != pass {
|
|
c.authUser = user
|
|
c.authPass = pass
|
|
c.authValidator = auth.NewValidator(user, pass, authMethods)
|
|
}
|
|
|
|
err := c.authValidator.ValidateHeader(req.Header["Authorization"],
|
|
req.Method, req.URL, altURL)
|
|
if err != nil {
|
|
c.authFailures++
|
|
|
|
// vlc with login prompt sends 4 requests:
|
|
// 1) without credentials
|
|
// 2) with password but without username
|
|
// 3) without credentials
|
|
// 4) with password and username
|
|
// therefore we must allow up to 3 failures
|
|
if c.authFailures > 3 {
|
|
c.log(logger.Info, "ERR: unauthorized: %s", err)
|
|
|
|
return errAuthCritical{&base.Response{
|
|
StatusCode: base.StatusUnauthorized,
|
|
Header: base.Header{
|
|
"WWW-Authenticate": c.authValidator.GenerateHeader(),
|
|
},
|
|
}}
|
|
}
|
|
|
|
if c.authFailures > 1 {
|
|
c.log(logger.Debug, "WARN: unauthorized: %s", err)
|
|
}
|
|
|
|
return errAuthNotCritical{&base.Response{
|
|
StatusCode: base.StatusUnauthorized,
|
|
Header: base.Header{
|
|
"WWW-Authenticate": c.authValidator.GenerateHeader(),
|
|
},
|
|
}}
|
|
}
|
|
}
|
|
|
|
// login successful, reset authFailures
|
|
c.authFailures = 0
|
|
|
|
return nil
|
|
}
|
|
|
|
func (c *Client) startPlay() {
|
|
res := make(chan struct{})
|
|
c.path.OnClientPlay(PlayReq{c, res})
|
|
<-res
|
|
|
|
c.log(logger.Info, "is reading from path '%s', %d %s with %s", c.path.Name(),
|
|
c.conn.SetuppedTracksLen(),
|
|
func() string {
|
|
if c.conn.SetuppedTracksLen() == 1 {
|
|
return "track"
|
|
}
|
|
return "tracks"
|
|
}(),
|
|
*c.conn.SetuppedTracksProtocol())
|
|
|
|
if c.path.Conf().RunOnRead != "" {
|
|
c.onReadCmd = externalcmd.New(c.path.Conf().RunOnRead, c.path.Conf().RunOnReadRestart, externalcmd.Environment{
|
|
Path: c.path.Name(),
|
|
Port: strconv.FormatInt(int64(c.rtspPort), 10),
|
|
})
|
|
}
|
|
}
|
|
|
|
func (c *Client) stopPlay() {
|
|
if c.path.Conf().RunOnRead != "" {
|
|
c.onReadCmd.Close()
|
|
}
|
|
}
|
|
|
|
func (c *Client) startRecord() {
|
|
res := make(chan struct{})
|
|
c.path.OnClientRecord(RecordReq{c, res})
|
|
<-res
|
|
|
|
c.log(logger.Info, "is publishing to path '%s', %d %s with %s", c.path.Name(),
|
|
c.conn.SetuppedTracksLen(),
|
|
func() string {
|
|
if c.conn.SetuppedTracksLen() == 1 {
|
|
return "track"
|
|
}
|
|
return "tracks"
|
|
}(),
|
|
*c.conn.SetuppedTracksProtocol())
|
|
|
|
if c.path.Conf().RunOnPublish != "" {
|
|
c.onPublishCmd = externalcmd.New(c.path.Conf().RunOnPublish, c.path.Conf().RunOnPublishRestart, externalcmd.Environment{
|
|
Path: c.path.Name(),
|
|
Port: strconv.FormatInt(int64(c.rtspPort), 10),
|
|
})
|
|
}
|
|
}
|
|
|
|
func (c *Client) stopRecord() {
|
|
if c.path.Conf().RunOnPublish != "" {
|
|
c.onPublishCmd.Close()
|
|
}
|
|
}
|
|
|
|
// OnReaderFrame implements path.Reader.
|
|
func (c *Client) OnReaderFrame(trackID int, streamType base.StreamType, buf []byte) {
|
|
if !c.conn.HasSetuppedTrack(trackID) {
|
|
return
|
|
}
|
|
|
|
c.conn.WriteFrame(trackID, streamType, buf)
|
|
}
|