Added a command-line option to tune SAT>IP servers without actually processing the stream.

skyscraper8/GS/GSE-BFBS/BfbsGseReader.cs

@@ -120,6 +120,11 @@ namespace skyscraper8.GS.GSE_BFBS
 					if (!startIndicator && endIndicator)
 						gseLength -= 4;
 
+					if (span.GetAvailableBytes() < gseLength)
+					{
+						//broken gse packet, invalid length
+						return;
+					}
 					gsePacket.GseDataBytes = span.ReadBytes(gseLength);
 					
 					if (!startIndicator && endIndicator)

skyscraper8/Program.cs

@@ -290,6 +290,15 @@ namespace skyscraper5
 	                return;
                 }
 
+                if (args[0].ToLowerInvariant().Equals("satip-playout"))
+                {
+                    QuickAndDirtySatIpClient qadsipc = new QuickAndDirtySatIpClient(args);
+                    qadsipc.SetPlayoutMode(args);
+                    qadsipc.Run();
+                    return;
+                }
+
+
                 if (args[0].ToLowerInvariant().Equals("shannon"))
                 {
 	                if (args.Length != 2)
@@ -392,6 +401,7 @@ namespace skyscraper5
             Console.WriteLine("         or: .\\skyscraper8.exe \"C:\\path\\to\\file.ts\\");
             Console.WriteLine("         or: .\\skyscraper8.exe \"C:\\path\\to\\my\\folder\\with\\ts\\files\\\" (for batch extraction)");
             Console.WriteLine("         or: .\\skyscraper8.exe satip IP_ADDRESS DISEQC POLARITY FREQUENCY SYSTEM SYMBOL_RATE (see README file)");
+            Console.WriteLine("         or: .\\skyscraper8.exe satip-playout IP_ADDRESS DISEQC POLARITY FREQUENCY SYSTEM SYMBOL_RATE DESTINATION_PORT");
             Console.WriteLine("         or: .\\skyscraper8.exe pcap-on   - to write a configuration file that allows PCAP writing during scraping.");
             Console.WriteLine("         or: .\\skyscraper8.exe pcap-off  - to write a configuration file that turns off PCAP writing during scraping.");
             Console.WriteLine("         or: .\\skyscraper8.exe subts-on  - to write a configuration file that allows extraction of nested TS.");

skyscraper8/Properties/launchSettings.json

@@ -2,6 +2,7 @@
   "profiles": {
     "skyscraper8": {
       "commandName": "Project",
+      "commandLineArgs": "satip-playout auto 1 V 12597 S2 45000 6970",
       "remoteDebugEnabled": false
     },
     "Container (Dockerfile)": {

skyscraper8/QuickAndDirtySatIpClient.cs

@@ -74,6 +74,17 @@ namespace skyscraper8
 			symbolRate = Int32.Parse(args[6]);
 		}
 
+		public void SetPlayoutMode(string[] args)
+		{
+			if (args.Length == 7)
+			{
+				logger.Fatal("What's the target port?");
+				return;
+			}
+			destinationPort = int.Parse(args[7]);
+			playoutMode = true;
+		}
+
 		private IPAddress AutodetectIPAddress()
 		{
 			SsdpDevice firstSatIpServer = SsdpClient.GetFirstSatIpServer(1000, null);
@@ -105,7 +116,7 @@ namespace skyscraper8
 			SessionDescriptionProtocol sessionDescriptionProtocol = describe.GetSessionDescriptionProtocol();
 
 			packetQueue = new Queue<byte[]>();
-			RtspSetupResponse setup = rtspClient.GetSetup(url);
+			RtspSetupResponse setup = rtspClient.GetSetup(url, destinationPort);
 			if (setup.RtspStatusCode == 404)
 			{
 				logger.Fatal("Your SAT>IP server doesn't have a tuner available that can talk to the requested frequency.");
@@ -118,15 +129,31 @@ namespace skyscraper8
 				dataStorage = new InMemoryScraperStorage();
 			if (objectStorage == null)
 				objectStorage = new FilesystemStorage(new DirectoryInfo("."));
+			if (!playoutMode)
+			{
 				context = new SkyscraperContext(new TsContext(), dataStorage, objectStorage);
 				context.EnableTimeout = true;
 				context.TimeoutSeconds = 60;
 				context.InitalizeFilterChain();
+			}
 
 			RtspPlayResponse play = rtspClient.GetPlay(setup);
 			DateTime lastTimestamp = DateTime.Now;
+			bool initMessagePrinted = false;
 
 			while (true)
+			{
+				if (playoutMode)
+				{
+					Thread.Sleep(1000);
+					Keepalive(url);
+					if (!initMessagePrinted)
+					{
+						logger.InfoFormat("Began SAT>IP playout to port {0}", destinationPort);
+						initMessagePrinted = true;
+					}
+				}
+				else
 				{
 					if (packetQueue.Count >= 1)
 					{
@@ -136,6 +163,11 @@ namespace skyscraper8
 							buffer = packetQueue.Dequeue();
 						}
 						context.IngestSinglePacket(buffer);
+						if (!initMessagePrinted)
+						{
+							logger.InfoFormat("Began SAT>IP stream.");
+							initMessagePrinted = true;
+						}
 					}
 					else
 					{
@@ -151,6 +183,7 @@ namespace skyscraper8
 						lastTimestamp = DateTime.Now;
 					}
 				}
+			}
 
 			rtspClient.GetTeardown(setup);
 			rtspClient.Dispose();
@@ -200,6 +233,10 @@ namespace skyscraper8
 		}
 
 		private int rtcps;
+        private IPAddress destinationIp;
+        private int destinationPort;
+        private bool playoutMode;
+
         private void Setup_OnRtcpPacket(byte[] data, int length)
 		{
 			//rtcps++;

skyscraper8/SatIp/RtspClient.cs

@@ -99,16 +99,25 @@ namespace skyscraper8.SatIp
 			return result;
 		}
 
-		public RtspSetupResponse GetSetup(string url)
+		public RtspSetupResponse GetSetup(string url, int destinationPort = 0)
 		{
 			RtspSetupRequest request = new RtspSetupRequest();
 			request.RequestPath = url;
 			request.CSeq = cseqCounter++;
 			request.UserAgent = USER_AGENT;
 
-			Socket rtpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
+			int rtpPort = 0;
+			Socket rtpSocket = null;
+			if (destinationPort == 0)
+			{
+				rtpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
 				rtpSocket.Bind(new IPEndPoint(ListenIp, 0));
-			int rtpPort = GetPortFromEndPoint(rtpSocket.LocalEndPoint);
+				rtpPort = GetPortFromEndPoint(rtpSocket.LocalEndPoint);
+			}
+			else
+			{
+				rtpPort = destinationPort;
+			}
 
 			Socket rtcpSocket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
 			rtcpSocket.Bind(new IPEndPoint(ListenIp, 0));

skyscraper8/SatIp/RtspResponses/RtspSetupResponse.cs

@@ -53,9 +53,14 @@ namespace skyscraper8.SatIp.RtspResponses
 			if (listenersStarted)
 				throw new RtspException("Listener already started.");
 
+			if (RtpSocket != null)
+			{
 				rtpCancellation = new CancellationTokenSource();
+			}
 			rtcpCancellation = new CancellationTokenSource();
 
+			if (RtpSocket != null)
+			{
 				Task.Run(async () =>
 					{
 						byte[] buffer = new byte[2048];
@@ -70,6 +75,7 @@ namespace skyscraper8.SatIp.RtspResponses
 						exitedThread++;
 					}
 				);
+			}
 
 			Task.Run(async () =>
 				{
@@ -92,8 +98,8 @@ namespace skyscraper8.SatIp.RtspResponses
 
 		internal void InvokeCancellationTokens()
 		{
-			rtpCancellation.Cancel();
+			rtpCancellation?.Cancel();
-			rtcpCancellation.Cancel();
+			rtcpCancellation?.Cancel();
 		}
 
 		public event OnRtpPacket OnRtpPacket;