public bool Options(RTSPRequestParser parser)
{
// TODO : Take care of the Uri format
string media = parser.Media;
ServerMediaSession session = Server.lookupServerMediaSession(media);
if (session == null)
{
HandleNotFound(parser);
return(false);
}
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Server: {0}\r\n", RTSPServer.ServerVersion);
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
sb.AppendFormat("Public: {0}\r\n", _supportedCommands);
sb.Append("\r\n");
SendResponse(sb.ToString());
return(true);
}
void HandleCommandNotSupported(RTSPRequestParser parser)
{
string reply = String.Format("RTSP/1.0 405 Method Not Allowed\r\nCSeq: {0}\r\n{1}\r\nAllow: {2}\r\n\r\n",
parser.Headers["CSEQ"], "Tue, 30 Aug 2016 01:33:17 GMT", _supportedCommands);
SendResponse(reply);
}
public void HandleUnsupportedTransport(RTSPRequestParser parser)
{
string reply = String.Format("RTSP/1.0 461 Unsupported Transport\r\nCSeq: {0}\r\n{1}\r\n\r\n",
parser.Headers["CSEQ"], "Tue, 30 Aug 2016 01:33:17 GMT");
SendResponse(reply);
}
public void HandleInvalidState(RTSPRequestParser parser)
{
string reply = String.Format("RTSP/1.0 455 Method Not Valid in This State\r\nCSeq: {0}\r\n{1}\r\n\r\n",
parser.Headers["CSEQ"], "Tue, 30 Aug 2016 01:33:17 GMT");
SendResponse(reply);
}
void HandleSessionNotFound(RTSPRequestParser parser)
{
string reply = String.Format("RTSP/1.0 454 Session Not Found\r\nCSeq: {0}\r\n{1}\r\n\r\n",
parser.Headers["CSEQ"], "Tue, 30 Aug 2016 01:33:17 GMT");
SendResponse(reply);
}
private void ParseGetParameter(RTSPRequestParser parser)
{
if (String.IsNullOrEmpty(parser.Body))
{
_connection.HandleInvalidParameter(parser);
}
}
public bool GetParameter(RTSPRequestParser parser)
{
string media = parser.Media;
ServerMediaSession session = _connection.Server.lookupServerMediaSession(media);
if (session == null)
{
_connection.HandleNotFound(parser);
return(false);
}
// Look up information for the specified subsession (track):
ServerMediaSubsession subsession = session.LookupSubSession(media);
// Not yet implemented
//ParseGetParameter(parser);
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Server: {0}\r\n", RTSPServer.ServerVersion);
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
sb.AppendFormat("Session: {0}\r\n", SessionId);
sb.Append("Last-Modified: Tue, 30 Aug 2016 01:33:17 GMT\r\n");
sb.Append("Date: Sat, 22 Dec 2018 16:18:03 GMT\r\n");
sb.Append("Expires: Sun, 23 Dec 2018 12:01:28 GMT\r\n\r\n");
string reply = sb.ToString();
_connection.SendResponse(reply);
return(true);
}
public void Teardown(RTSPRequestParser parser)
{
try
{
Close();
}
catch (Exception ex)
{
_logger.Error(ex);
}
}
public async Task <bool> Play(RTSPRequestParser parser)
{
string stream = parser.Media;
ServerMediaSession session = _connection.Server.lookupServerMediaSession(stream);
if (session == null)
{
_connection.HandleNotFound(parser);
return(false);
}
// Look up information for the specified subsession (track):
ServerMediaSubsession subsession;
subsession = session.LookupSubSession(stream);
ushort rtpSeqNum = 0;
uint rtpTimestamp = 0;
_rtpStream = subsession.GetStreamInstance();
rtpSeqNum = _rtpStream.CurrentSeqNo();
rtpTimestamp = _rtpStream.CurrentTimeStamp(); // presetNextTimestamp();
Playing = true;
await _rtpStream.AddDestination(this, _destinations);
if (_destinations.isTCP)
{
_connection.RegisterFilter(_rtpStream);
}
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Server: {0}\r\n", RTSPServer.ServerVersion);
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
sb.AppendFormat("Session: {0}\r\n", parser.Headers["SESSION"]);
sb.Append("Last-Modified: Tue, 30 Aug 2016 01:33:17 GMT\r\n");
sb.Append("Cache-Control: must-revalidate\r\n");
sb.Append("Date: Sat, 22 Dec 2018 16:18:03 GMT\r\n");
sb.Append("Expires: Sun, 23 Dec 2018 12:01:28 GMT\r\n");
sb.Append("Range: npt=0.000-\r\n").
AppendFormat("RTP-Info: url=rtsp://{0}:{1}/{2}/track1;seq={3};rtptime={4}\r\n\r\n",
SocketExtensions.GetLocalIPV4Address(),
_connection.Server.Port,
subsession.Name,
rtpSeqNum, rtpTimestamp);
string reply = sb.ToString();
_connection.SendResponse(reply);
return(true);
}
private bool SetParameter(RTSPRequestParser parser)
{
// Begin by looking up the "ServerMediaSession" object for the specified "urlTotalSuffix":
string media = parser.Media;
ServerMediaSession session = Server.lookupServerMediaSession(media);
if (session == null)
{
HandleNotFound(parser);
return(false);
}
// Look up information for the specified subsession (track):
ServerMediaSubsession subsession;
media = media.TrimEnd('/'); // parser.Uri.Segments[2].TrimStart('/');
subsession = session.LookupSubSession(media);
string body = parser.Body;
if (String.IsNullOrEmpty(body))
{
HandleInvalidParameter(parser);
}
Dictionary <string, string> parameters = new Dictionary <string, string>();
try
{
StringParser bodyParser = new StringParser(body.ToUpper());
ParseParameters(parser, bodyParser, parameters);
Server.NewParameters(parameters);
}
catch
{
return(true);
}
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Server: {0}\r\n", RTSPServer.ServerVersion);
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
sb.Append("\r\n");
SendResponse(sb.ToString());
return(true);
}
private bool Describes(RTSPRequestParser parser)
{
// Begin by looking up the "ServerMediaSession" object for the specified "urlTotalSuffix":
string media = parser.Media;
ServerMediaSession session = Server.lookupServerMediaSession(media);
if (session == null)
{
HandleNotFound(parser);
return(false);
}
// Look up information for the specified subsession (track):
ServerMediaSubsession subsession;
media = media.TrimEnd('/'); // parser.Uri.Segments[2].TrimStart('/');
subsession = session.LookupSubSession(media);
var sdp = subsession.GenerateSDPDescription();
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Server: {0}\r\n", RTSPServer.ServerVersion);
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
sb.Append("Last-Modified: Tue, 30 Aug 2016 01:33:17 GMT\r\n");
sb.Append("Cache-Control: must-revalidate\r\n");
sb.AppendFormat("Content-length: {0}\r\n", sdp.Length);
sb.Append("Date: Sat, 22 Dec 2018 16:18:03 GMT\r\n");
sb.Append("Expires: Sat, 22 Dec 2018 16:18:03 GMT\r\n");
sb.Append("Content-Type: application/sdp\r\n").
Append("x-Accept-Retransmit: our-retransmit\r\n").
Append("x-Accept-Dynamic-Rate: 1\r\n").
AppendFormat("Content-Base: rtsp://{0}:{1}/{2}\r\n\r\n", SocketExtensions.GetLocalIPV4Address(), Server.Port, subsession.Name).
Append(sdp);
var str = sb.ToString();
SendResponse(str);
return(true);
}
public void HandleInvalidParameter(RTSPRequestParser parser, params string[] parameters)
{
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 451 Invalid Parameter\r\n");
sb.AppendFormat("CSeq: {0}\r\n", parser.Headers["CSEQ"]);
StringBuilder body = new StringBuilder();
foreach (var str in parameters)
{
body.AppendFormat("{0}\r\n", str);
}
string tmp = body.ToString();
sb.AppendFormat("Content-length: {0}\r\n", tmp.Length);
sb.Append("Content-type: text/parameters\r\n\r\n");
sb.AppendFormat("{0}", tmp);
SendResponse(sb.ToString());
}
public bool Pause(RTSPRequestParser parser)
{
if (!Playing)
{
_connection.HandleInvalidState(parser);
return(true);
}
if (_rtpStream != null)
{
_rtpStream.RemoveSession(SessionId);
Playing = false;
}
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
sb.AppendFormat("Session: {0}\r\n", parser.Headers["SESSION"]);
sb.Append("Date: Sat, 22 Dec 2018 16:18:03 GMT\r\n\r\n");
_connection.SendResponse(sb.ToString());
return(true);
}
public async Task <bool> ProcessIncomingRequest(string message)
{
bool retVal = false;
if (_logger.IsDebugEnabled)
{
_logger.Debug("C->S:\n{0}", message);
}
if (_session != null)
{
_session.LastKeepAlive = DateTime.Now;
}
RTSPRequestParser parser = new RTSPRequestParser();
try
{
parser.Parse(message.ToUpper()); // TODO : Error handling
}
catch (Exception ex)
{
_logger.Error(ex);
HandleBadRequest();
return(false);
}
if (!_commands.Contains(parser.Method))
{
HandleCommandNotSupported(parser);
return(false);
}
if (!String.IsNullOrEmpty(parser.TransportType))
{
if (parser.TransportType != "RTP/AVP" && parser.TransportType != "RTP/AVP/TCP")
{
HandleUnsupportedTransport(parser);
return(false);
}
}
// Handle session less verbs first
if (parser.Method == "OPTIONS")
{
retVal = Options(parser);
return(retVal);
}
if (parser.Method == "DESCRIBE")
{
retVal = Describes(parser);
return(retVal);
}
if (parser.Method == "SET_PARAMETER")
{
retVal = SetParameter(parser);
return(retVal);
}
if (parser.Headers.ContainsKey("SESSION"))
{
_session = Server.GetSession(Convert.ToInt32(parser.Headers["SESSION"]));
if (_session == null)
{
HandleSessionNotFound(parser);
return(false);
}
}
else
{
_session = Server.GenerateSession(this);
if (_logger.IsDebugEnabled)
{
_logger.Debug("Generating new session {0}", _session.SessionId);
}
}
_session.LastKeepAlive = DateTime.Now;
if (parser.Method == "SETUP")
{
retVal = _session.Setup(_tcpClient, parser);
}
else if (parser.Method == "PAUSE")
{
retVal = _session.Pause(parser);
}
else if (parser.Method == "GET_PARAMETER")
{
retVal = _session.GetParameter(parser);
}
else if (parser.Method == "PLAY")
{
retVal = await _session.Play(parser);
}
else if (parser.Method == "TEARDOWN")
{
_session.Teardown(parser);
return(false);
}
else
{
HandleBadRequest();
}
return(retVal);
}
public void HandleNotFound(RTSPRequestParser parser)
{
string reply = String.Format("RTSP/1.0 404 Stream Not Found\r\nCSeq: {0}\r\n\r\n", parser.Headers["CSEQ"]);
SendResponse(reply);
}
public bool Setup(TcpClient tcpSocket, RTSPRequestParser parser)
{
string media = parser.Media;
ServerMediaSession session = _connection.Server.lookupServerMediaSession(media);
if (session == null)
{
_connection.HandleNotFound(parser);
return(false);
}
// Look up information for the specified subsession (track):
ServerMediaSubsession subsession = session.LookupSubSession(media);
Socket socket = null;
if (String.Compare(parser.TransportType, "RTP/AVP/TCP") == 0)
{
socket = tcpSocket.Client;
IsRTPOverTCP = true;
}
if ((subsession.IsMulticast && parser.TransportMode == "UNICAST") || (!subsession.IsMulticast && parser.TransportMode == "MULTICAST"))
{
_connection.HandleUnsupportedTransport(parser);
return(false);
}
int clientRTPPort = parser.ClientPort1;
int clientRTCPPort = parser.ClientPort2;
int serverRTPPort;
int serverRTCPPort;
string multiCastAddress;
var clientAddress = tcpSocket.Client.RemoteEndPoint as IPEndPoint;
subsession.GetStreamParameters(out serverRTPPort, out serverRTCPPort, out multiCastAddress);
SetupDestinations(socket, clientAddress, null, clientRTPPort, clientRTCPPort, (byte)parser.Channel1, (byte)parser.Channel2);
StringBuilder sb = new StringBuilder();
sb.Append("RTSP/1.0 200 OK\r\n");
sb.AppendFormat("Server: {0}\r\n", RTSPServer.ServerVersion);
sb.AppendFormat("Cseq: {0}\r\n", parser.Headers["CSEQ"]);
var localIP = SocketExtensions.GetLocalIPV4Address();
if (parser.TransportMode == "UNICAST")
{
sb.AppendFormat("Session: {0}\r\n", SessionId);
sb.Append("Last-Modified: Tue, 30 Aug 2016 01:33:17 GMT\r\n");
sb.Append("Cache-Control: must-revalidate\r\n");
sb.Append("Date: Sat, 22 Dec 2018 16:18:03 GMT\r\n");
sb.Append("Expires: Sun, 23 Dec 2018 12:01:28 GMT\r\n");
if (socket == null)
{
// UDP
sb.AppendFormat("Transport: RTP/AVP;unicast;destination={0};source={1};client_port={2}-{3};server_port={4}-{5};\r\n\r\n",
clientAddress.Address,
localIP,
parser.ClientPort1,
parser.ClientPort2,
serverRTPPort,
serverRTCPPort);
}
else
{
// TCP
sb.AppendFormat("Transport: RTP/AVP/TCP;unicast;destination={0};source={1};interleaved={2}-{3}\r\n\r\n",
clientAddress.Address,
localIP,
parser.Channel1,
parser.Channel2);
}
}
// Multicast
else
{
sb.Append("Date: Sat, 22 Dec 2018 16:18:03 GMT\r\n");
sb.AppendFormat("Transport: RTP/AVP;multicast;destination={0};source={1};port={2}-{3};ttl=255\r\n",
multiCastAddress,
localIP,
serverRTPPort,
serverRTCPPort).
AppendFormat("Session: {0};timeout=65\r\n\r\n", SessionId);
}
var reply = sb.ToString();
_connection.SendResponse(reply);
return(true);
}
private void ParseParameters(RTSPRequestParser requestParser, StringParser parser, Dictionary <string, string> parameters)
{
while ((parser.Peek() != '\r') && (parser.Peek() != '\n'))
{
//First get the parameter identifier
bool isOk;
string keyword = parser.GetThru(':', out isOk);
if (!isOk)
{
if (!parser.ParserEndOfString())
{
throw new Exception(String.Format("Missing semicolumn in body {0}", parser.ToString()));
}
else
{
return;
}
}
keyword = keyword.Trim();
//Look up the proper header enumeration based on the header string.
//Use the enumeration to look up the dictionary ID of this header,
//and set that dictionary attribute to be whatever is in the body of the header
var headerVal = parser.ConsumeUntil(StringParser.sEOLMask);
headerVal = headerVal.Trim();
if (!RTSPServer._validParameters.Contains(keyword))
{
HandleInvalidParameter(requestParser, keyword);
}
else
{
parameters.Add(keyword, headerVal);
}
if ((parser.Peek() == '\r') || (parser.Peek() == '\n'))
{
isOk = true;
parser.ConsumeEOL();
}
else
{
isOk = false;
}
while ((parser.Peek() == ' ') || (parser.Peek() == '\t'))
{
parser.ConsumeUntil(StringParser.sEOLMask);
if ((parser.Peek() == '\r') || (parser.Peek() == '\n'))
{
isOk = true;
parser.ConsumeEOL();
}
else
{
isOk = false;
}
}
try
{
switch (keyword)
{
case "WIDTH":
Convert.ToInt32(headerVal);
break;
case "HEIGHT":
Convert.ToInt32(headerVal);
break;
}
}
catch
{
HandleInvalidParameter(requestParser, keyword, headerVal);
throw;
}
if (!isOk)
{
throw new Exception(String.Format("Error in header {0}", parser.ToString()));
}
;
}
if (!parser.ExpectEOL())
{
throw new Exception(String.Format("Invalid request {0}", parser.ToString()));
}
}
