internal static void TestInterleavedFraming()
{
Console.WriteLine(System.Reflection.MethodBase.GetCurrentMethod().Name);
//Create a rtp client to mock the test
using (Media.Rtp.RtpClient test = new Media.Rtp.RtpClient())
{
Media.Rtsp.RtspMessage lastInterleaved = null;
int rtspOut = 0, rtspIn = 0;
//Setup an even to see what data was transmited.
test.OutOfBandData += (sender, data, offset, count) =>
{
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("\tInterleaved (@" + offset + ", count=" + count + ") =>" + System.Text.Encoding.ASCII.GetString(data, offset, count));
GetMessage:
Media.Rtsp.RtspMessage interleaved = new Media.Rtsp.RtspMessage(data, offset, count);
if (interleaved.RtspMessageType == Media.Rtsp.RtspMessageType.Invalid && lastInterleaved != null)
{
interleaved.Dispose();
interleaved = null;
int lastLength = lastInterleaved.Length;
using (var memory = new Media.Common.MemorySegment(data, offset, count))
{
int used = lastInterleaved.CompleteFrom(null, memory);
if (used == 0 || lastLength == lastInterleaved.Length)
{
return;
}
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Added Data (" + used + ") Bytes");
}
}
else
{
lastInterleaved = interleaved;
++rtspIn;
}
if (lastInterleaved.IsComplete)
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Complete Message: " + lastInterleaved);
}
else
{
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.WriteLine("Incomplete Message: " + lastInterleaved);
}
int totalLength = lastInterleaved.Length;
if (totalLength < count)
{
offset += totalLength;
count -= totalLength;
goto GetMessage;
}
};
//Loop 255 times
foreach (var testIndex in Enumerable.Range(byte.MinValue, byte.MaxValue))
{
//reset rtsp count
rtspOut = rtspIn = 0;
//Declare a channel randomly
int channel = Media.Utility.Random.Next(byte.MinValue, byte.MaxValue);
//Declare a random length
int length = Media.Utility.Random.Next(ushort.MinValue, ushort.MaxValue);
//Determine an actual length
int actualLength = 0;
//Make a header
var header = new byte[] { Media.Rtp.RtpClient.BigEndianFrameControl, (byte)channel, 0, 0 };
//Write the length in the header
Media.Common.Binary.Write16(header, 2, Common.Binary.IsLittleEndian, (short)length);
//Get the data indicated
//var data = header.Concat(Enumerable.Repeat(default(byte), actualLength));
List <byte> allData = new List <byte>();
//Add more data until actualLength is less then length
while (actualLength < length)
{
//Make a message
var rtspBytes = new Media.Rtsp.RtspMessage(Media.Rtsp.RtspMessageType.Response, 1.0, Media.Rtsp.RtspMessage.DefaultEncoding)
{
RtspStatusCode = Media.Rtsp.RtspStatusCode.OK,
CSeq = Media.Utility.Random.Next(byte.MinValue, int.MaxValue),
UserAgent = "$UserAgent $007\r\n$\0\0\aRTSP/1.0",
Body = "$00Q\r\n$\0:\0"
}.Prepare();
byte[] data = new byte[Media.Utility.Random.Next(1, length)];
Media.Utility.Random.NextBytes(data);
//determine if there is more space
actualLength += data.Length;
//Put a message here
allData.AddRange(rtspBytes.ToArray());
//Increment the outgoing message count
++rtspOut;
//Put some data
allData.AddRange(data);
//Put a message
allData.AddRange(rtspBytes.ToArray());
//Increment the outgoing message count
++rtspOut;
//If there is more space put another binary frame
if (actualLength < length)
{
int needed = length - actualLength;
//Randomize needed
needed = Media.Utility.Random.Next(0, needed);
var headerLast = new byte[] { 0x24, (byte)channel, 0, 0 };
Media.Common.Binary.Write16(headerLast, 2, Common.Binary.IsLittleEndian, (short)needed);
data = new byte[needed];
Media.Utility.Random.NextBytes(data);
allData.AddRange(data);
actualLength += needed;
}
}
//Start at 0
int offset = 0;
byte[] buffer = allData.ToArray();
int max = buffer.Length, remains = actualLength;
//Enumerate the buffer looking for data to parse
//TODO Improve test by setting expections of packets to receive
while (remains > 0)
{
//Parse the data "received" which should always be 4 bytes longer then what was actually present.
int foundLen = test.ProcessFrameData(buffer, offset, remains, null);
Console.WriteLine("Indicated: " + actualLength + " Actual: " + max + " Found: " + foundLen);
System.Diagnostics.Debug.Assert(foundLen <= max);
if (foundLen > 0)
{
//Move the offset
offset += foundLen;
max -= foundLen;
remains -= foundLen;
}
else
{
++offset;
--max;
--remains;
}
}
//Some Rtsp messages may have been hidden by invalid tcp frames which indicated a longer length then they actually had.
if (rtspOut > rtspIn)
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Missed:" + (rtspOut - rtspIn) + " Messages of" + rtspOut);
}
else if (rtspIn == 0)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Missed All Messages");
}
else
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Missed No Messages");
}
}
}
}
void ProcessInterleaveData(object sender, byte[] data, int offset, int length)
{
ConsoleColor previousForegroundColor = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("ProcessInterleaveData(): offset = " + offset + ", length = :" + length);
byte[] buffer = new byte[length];
Array.Copy(data, offset, buffer, 0, length);
// Using ASCII instead of UTF8 to get all bytes printed.
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.WriteLine("'" + System.Text.Encoding.ASCII.GetString(buffer) + "'");
GetMessage:
try
{
Media.Rtsp.RtspMessage interleaved = new Media.Rtsp.RtspMessage(data, offset, length);
if (interleaved.MessageType == Media.Rtsp.RtspMessageType.Invalid && lastInterleaved != null)
{
interleaved.Dispose();
interleaved = null;
int lastLength = lastInterleaved.Length;
using (var memory = new Media.Common.MemorySegment(data, offset, length))
{
lastInterleaved.CompleteFrom(null, memory);
if (lastLength == lastInterleaved.Length) return;
}
}
else lastInterleaved = interleaved;
//If the last message was complete then show it in green
if (lastInterleaved.IsComplete) Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("ProcessInterleaveData() RtspMessage.MessageType = " + lastInterleaved.MessageType.ToString());
Console.WriteLine("ProcessInterleaveData() RtspMessage.CSeq = " + lastInterleaved.CSeq);
Console.WriteLine("ProcessInterleaveData() RtspMessage = '" + lastInterleaved.ToString() + "'");
Console.ForegroundColor = previousForegroundColor;
int totalLength = lastInterleaved.Length;
if (totalLength < length)
{
offset += totalLength;
length -= totalLength;
goto GetMessage;
}
}
catch (Exception ex)
{
Console.WriteLine("ProcessInterleaveData() exception:" + ex.ToString());
Console.WriteLine("");
//throw;
}
}
void ProcessInterleaveData(object sender, byte[] data, int offset, int length)
{
ConsoleColor previousForegroundColor = Console.ForegroundColor;
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("ProcessInterleaveData(): offset = " + offset + ", length = :" + length);
byte[] buffer = new byte[length];
Array.Copy(data, offset, buffer, 0, length);
// Using ASCII instead of UTF8 to get all bytes printed.
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.WriteLine("'" + System.Text.Encoding.ASCII.GetString(buffer) + "'");
GetMessage:
try
{
Media.Rtsp.RtspMessage interleaved = new Media.Rtsp.RtspMessage(data, offset, length);
if (interleaved.RtspMessageType == Media.Rtsp.RtspMessageType.Invalid && lastInterleaved != null)
{
interleaved.Dispose();
interleaved = null;
int lastLength = lastInterleaved.Length;
using (var memory = new Media.Common.MemorySegment(data, offset, length))
{
lastInterleaved.CompleteFrom(null, memory);
if (lastLength == lastInterleaved.Length)
{
return;
}
}
}
else
{
lastInterleaved = interleaved;
}
//If the last message was complete then show it in green
if (lastInterleaved.IsComplete)
{
Console.ForegroundColor = ConsoleColor.Green;
}
Console.WriteLine("ProcessInterleaveData() RtspMessage.MessageType = " + lastInterleaved.RtspMessageType.ToString());
Console.WriteLine("ProcessInterleaveData() RtspMessage.CSeq = " + lastInterleaved.CSeq);
Console.WriteLine("ProcessInterleaveData() RtspMessage = '" + lastInterleaved.ToString() + "'");
Console.ForegroundColor = previousForegroundColor;
int totalLength = lastInterleaved.Length;
if (totalLength < length)
{
offset += totalLength;
length -= totalLength;
goto GetMessage;
}
}
catch (Exception ex)
{
Console.WriteLine("ProcessInterleaveData() exception:" + ex.ToString());
Console.WriteLine("");
//throw;
}
}
internal static void TestInterleavedFraming()
{
Console.WriteLine(System.Reflection.MethodBase.GetCurrentMethod().Name);
//Create a rtp client to mock the test
using (Media.Rtp.RtpClient test = new Media.Rtp.RtpClient())
{
Media.Rtsp.RtspMessage lastInterleaved = null;
int rtspOut = 0, rtspIn = 0;
//Setup an even to see what data was transmited.
test.InterleavedData += (sender, data, offset, count) =>
{
Console.ForegroundColor = ConsoleColor.Cyan;
//Console.WriteLine("\tInterleaved (@" + offset + ", count=" + count + ") =>" + System.Text.Encoding.ASCII.GetString(data, offset, count));
int usedBytes = 0;
GetMessage:
Media.Rtsp.RtspMessage interleaved = new Media.Rtsp.RtspMessage(data, offset, count);
//Todo, revise to create segment then attempt completion
if ((interleaved.MessageType == Media.Rtsp.RtspMessageType.Invalid
||
lastInterleaved != null)
&&
count >= Media.Rtsp.RtspMessage.MinimumStatusLineSize)
{
interleaved.Dispose();
interleaved = null;
using (var memory = new Media.Common.MemorySegment(data, offset, count))
{
usedBytes = lastInterleaved.CompleteFrom(null, memory);
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Added Data (" + usedBytes + ") Bytes");
}
}
else
{
lastInterleaved = interleaved;
++rtspIn;
usedBytes = lastInterleaved.Length;
}
if (lastInterleaved.IsComplete)
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Complete Message: " + lastInterleaved);
}
else
{
Console.ForegroundColor = ConsoleColor.DarkYellow;
Console.WriteLine("Incomplete Message: " + lastInterleaved);
}
if (usedBytes > 0 && usedBytes < count)
{
offset += usedBytes;
count -= usedBytes;
if(count > 0) goto GetMessage;
}
};
//Loop 255 times
foreach (var testIndex in Enumerable.Range(byte.MinValue, byte.MaxValue))
{
//reset rtsp count
rtspOut = rtspIn = 0;
//Declare a channel randomly
int channel = Media.Utility.Random.Next(byte.MinValue, byte.MaxValue);
//Declare a random length
int length = Media.Utility.Random.Next(ushort.MinValue, ushort.MaxValue);
//Determine an actual length
int actualLength = 0;
//Make a header
var header = new byte[] { Media.Rtp.RtpClient.BigEndianFrameControl, (byte)channel, 0, 0 };
//Write the length in the header
Media.Common.Binary.Write16(header, 2, BitConverter.IsLittleEndian, (short)length);
//Get the data indicated
//var data = header.Concat(Enumerable.Repeat(default(byte), actualLength));
List<byte> allData = new List<byte>();
//Add more data until actualLength is less then length
while (actualLength < length)
{
//Make a message
var rtspBytes = new Media.Rtsp.RtspMessage(Media.Rtsp.RtspMessageType.Response, 1.0, Media.Rtsp.RtspMessage.DefaultEncoding)
{
StatusCode = Media.Rtsp.RtspStatusCode.OK,
CSeq = Media.Utility.Random.Next(byte.MinValue, int.MaxValue),
UserAgent = "$UserAgent $007\r\n$\0\0\aRTSP/1.0",
Body = "$00Q\r\n$\0:\0"
}.Prepare();
byte[] data = new byte[Media.Utility.Random.Next(1, length)];
Media.Utility.Random.NextBytes(data);
//determine if there is more space
actualLength += data.Length;
//Put a message here
allData.AddRange(rtspBytes.ToArray());
//Increment the outgoing message count
++rtspOut;
//Put some data
allData.AddRange(data);
//Put a message
allData.AddRange(rtspBytes.ToArray());
//Increment the outgoing message count
++rtspOut;
//If there is more space put another binary frame
if (actualLength < length)
{
int needed = length - actualLength;
//Randomize needed
needed = Media.Utility.Random.Next(0, needed);
var headerLast = new byte[] { 0x24, (byte)channel, 0, 0 };
Media.Common.Binary.Write16(headerLast, 2, BitConverter.IsLittleEndian, (short)needed);
data = new byte[needed];
Media.Utility.Random.NextBytes(data);
allData.AddRange(data);
actualLength += needed;
}
}
//Start at 0
int offset = 0;
byte[] buffer = allData.ToArray();
int max = buffer.Length;
//Enumerate the buffer looking for data to parse
//TODO Improve test by setting expections of packets to receive
while (offset < max)
{
//Parse the data "received" which should always be 4 bytes longer then what was actually present.
int foundLen = test.ProcessFrameData(buffer, offset, max - offset, null);
if (foundLen > max) throw new Exception("TestInterleavedFraming found an invalid length.");
//Move the offset
offset += foundLen;
Console.WriteLine(" Found: " + foundLen);
}
//Some Rtsp messages may have been hidden by invalid 'tcp' framing which indicated a longer length then they actually had.
if (rtspOut > rtspIn)
{
Console.ForegroundColor = ConsoleColor.Yellow;
Console.WriteLine("Missed:" + (rtspOut - rtspIn) + " Messages of" + rtspOut);
}
else if (rtspIn == 0)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("Missed All Messages");
}
else
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("Missed No Messages");
}
}
}
}