internal static string Bytes2StringWithLength(Stream stream)
{
string s = "";
byte[] buff = HelperTools.RentBuffer(256);
if (stream.Read(buff, 0, 4) == 4)
{
int length = BitConverter.ToInt32(buff, 0);
if (stream.Read(buff, 0, length) == length)
{
s = Encoding.ASCII.GetString(buff, 0, length);
}
}
return(s);
//int stringLength = BitConverter.ToInt32(_buff, _offset);
//if (stringLength > 0 && stringLength < _buff.Length - _offset)
//{
// s = Encoding.ASCII.GetString(_buff, _offset + 4, stringLength);
//}
//return s;
}
//public bool RemovePeer(string _id)
//{
// if (CurrentState != State.Stoped)
// return false;
// return udpSenders.Remove(HelperTools.GetDeterministicHashCode(_id));
//}
/// <summary>
/// Resets the ID Peer to its default
/// </summary>
/// <param name="_id">ID of the peer</param>
/// <param name="pOriginal">Returns the default peer tha was present in the file</param>
/// <returns></returns>
public bool RemoveReplayAddress(string _id, out PlayPeerInfo pOriginal)
{
pOriginal = null;
if (CurrentState != State.Stoped)
{
return(false);
}
int hashedID = HelperTools.GetDeterministicHashCode(_id);
if (udpSenders.TryGetValue(hashedID, out PlayPeerInfo p))
{
var original = udpSendersOriginal[hashedID];
p.IP = original.IP;
p.Port = original.Port;
p.NIC = original.NIC;
pOriginal = original;
return(true);
}
return(false);
}
internal static ulong IPPort2Long(string _ip, int _port)
{
byte[] _buffer = new byte[8];
ushort[] ipChunks = new ushort[4];
string[] chunks = _ip.Split('.');
if (chunks.Length == 4)
{
for (int i = 0; i < 4; i++)
{
ipChunks[i] = ushort.Parse(chunks[i]);
}
}
// IP 4
for (int i = 0; i < 4; i++)
{
_buffer[i] = (byte)ipChunks[i];
}
// Port 4
HelperTools.Int32Bytes(_buffer, 4, _port);
return(BitConverter.ToUInt64(_buffer, 0));
}
/// <summary>
/// Enables or disables a given peer by ID
/// </summary>
/// <param name="_id">ID of the peer</param>
/// <param name="enabled">Enable if true, disable if false</param>
public void SetPeerEnabled(string _id, bool enabled)
{
int hashedID = HelperTools.GetDeterministicHashCode(_id);
if (udpSenders.TryGetValue(hashedID, out PlayPeerInfo p))
{
p.IsEnabled = enabled;
}
}
private void WriteHeader(long _time, string _ID, int _size, uint _ip, int _port)
{
Span <byte> headerSpan = stackalloc byte[HelperTools.headerSize];
// Time 8
BinaryPrimitives.WriteInt64LittleEndian(headerSpan, _time);
// Hashed ID 4
BinaryPrimitives.WriteInt32LittleEndian(headerSpan.Slice(8), HelperTools.GetDeterministicHashCode(_ID));
// IP 4
BinaryPrimitives.WriteUInt32LittleEndian(headerSpan.Slice(12), _ip);
// Port 4
BinaryPrimitives.WriteInt32LittleEndian(headerSpan.Slice(16), _port);
// Size 4
BinaryPrimitives.WriteInt32LittleEndian(headerSpan.Slice(20), _size);
// Write
file.Write(headerSpan);
}
/// <summary>
/// Retrieves information from the recording idx file
/// </summary>
/// <param name="_idxFilePath"></param>
/// <returns>Peers, recording date and time, duration in secs, recording size in bytes</returns>
public static (ICollection <PlayPeerInfo>, DateTime, int, long) GetRecordingInfo(string _idxFilePath)
{
int duration = 0;
int nPeers = 0;
int secsIdxInterval = 0;
DateTime date = DateTime.MinValue;
List <PlayPeerInfo> peers = new List <PlayPeerInfo>();
using (FileStream idxFile = new FileStream(_idxFilePath, FileMode.Open, FileAccess.Read))
using (BinaryReader idxBinaryReader = new BinaryReader(idxFile))
{
Span <byte> auxBuff = stackalloc byte[1024];
// Read DateTime, Secs Interval and Peers info
date = HelperTools.fromMillis(idxBinaryReader.ReadInt64());
secsIdxInterval = idxBinaryReader.ReadInt32();
nPeers = idxBinaryReader.ReadInt32();
// Read peers
for (int i = 0; i < nPeers; i++)
{
string ID = HelperTools.Bytes2StringWithLength(idxFile);
string IP = HelperTools.Bytes2StringWithLength(idxFile);
int Port = idxBinaryReader.ReadInt32();
peers.Add(new PlayPeerInfo
{
ID = ID,
IP = IP,
Port = Port
});
}
// Guess duration
FileInfo fInfo = new FileInfo(_idxFilePath);
duration = ((int)((fInfo.Length - idxBinaryReader.BaseStream.Position) / HelperTools.idxIndexSize)) * secsIdxInterval;
}
string rawFile = Path.Combine(Path.GetDirectoryName(_idxFilePath), Path.GetFileNameWithoutExtension(_idxFilePath)) + ".raw";
FileInfo fRaw = new FileInfo(rawFile);
return(peers, date, duration, fRaw.Length);
}
/// <summary>
/// Override the default destination ip of a recorded peer with a given one.
/// </summary>
/// <param name="_ID">ID of the peer</param>
/// <param name="_dstIP">New destination IP</param>
/// <param name="_dstPort">New destination Port</param>
/// <param name="_nic">NIC to send data from</param>
/// <returns></returns>
public bool AddReplayAddress(string _ID, string _dstIP, int _dstPort, string _nic)
{
if (CurrentState != State.Stoped)
{
return(false);
}
int hashedID = HelperTools.GetDeterministicHashCode(_ID);
if (udpSenders.TryGetValue(hashedID, out PlayPeerInfo p))
{
p.IP = _dstIP;
p.Port = _dstPort;
p.NIC = _nic;
return(true);
}
return(false);
}
private void FillIDXHeader(FileStream _idxFile)
{
Span <byte> idxHeader = stackalloc byte[4096];
// Time of recording
BinaryPrimitives.WriteInt64LittleEndian(idxHeader, HelperTools.millisFromEpochNow());
// Interval
BinaryPrimitives.WriteInt32LittleEndian(idxHeader.Slice(8), secsIdxInterval);
// Number of peers
BinaryPrimitives.WriteInt32LittleEndian(idxHeader.Slice(12), socketListeners.Count);
// Peer info
int nBytes = 16;
foreach (RecPeerInfo p in socketListeners.Values)
{
nBytes += HelperTools.StringWithLength2Bytes(idxHeader.Slice(nBytes), p.ID);
nBytes += HelperTools.StringWithLength2Bytes(idxHeader.Slice(nBytes), p.IP);
BinaryPrimitives.WriteInt32LittleEndian(idxHeader.Slice(nBytes), p.Port); nBytes += 4;
}
idxFile.Write(idxHeader.Slice(0, nBytes));
}
private void RunReaderSenderProcessCallback(string _filePath, string _idxFilePath, CancellationToken token)
{
ulong ip;
int n_bytes = 0, size = 0;
int hashedID = 0;
long timeoffset = 0, waitTime = 0, nowTime = 0, time = 0;
int lastTimeStatusS = 0, timeStatusS = 0;
// Increase timers resolution
WinAPI.WinAPITime.TimeBeginPeriod(1);
// Open file
using (FileStream file = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
if (has2UpdatePosition)
{
file.Seek(newPosition, SeekOrigin.Begin);
has2UpdatePosition = false;
resetTimeOffsetRequired = true;
}
while (!token.IsCancellationRequested)
{
// Paused
if (CurrentState == State.Paused)
{
Thread.Sleep(500);
}
else
{
if ((n_bytes = file.Read(buffer, 0, HelperTools.headerSize)) == HelperTools.headerSize)
{
// Get fields
replayTime = time = BitConverter.ToInt64(buffer, 0);
hashedID = BitConverter.ToInt32(buffer, 8);
ip = BitConverter.ToUInt64(buffer, 12);
size = BitConverter.ToInt32(buffer, 20);
// Update time in secs
timeStatusS = (int)(replayTime / 1000_000);
// Read Payload
n_bytes = file.Read(buffer, 0, size);
nowTime = HelperTools.GetLocalMicrosTime();
if (resetTimeOffsetRequired)
{
timeoffset = nowTime - time;
waitTime = 0;
resetTimeOffsetRequired = false;
}
else
{
nowTime -= timeoffset;
waitTime = time - nowTime;
if (waitTime > 1000) // 1ms
{
Thread.Sleep((int)(waitTime / 1000));
}
}
// Send
Send(hashedID, buffer, 0, n_bytes);
// Update Progress
if (timeStatusS != lastTimeStatusS)
{
ProgressEvent?.Invoke(timeStatusS);
lastTimeStatusS = timeStatusS;
}
if (has2UpdatePosition)
{
file.Seek(newPosition, SeekOrigin.Begin);
has2UpdatePosition = false;
resetTimeOffsetRequired = true;
}
}
else
{
// End of File
cancelSource.Cancel();
// Update Stop Status
CurrentState = State.Stoped;
StatusEvent?.Invoke(CurrentState);
foreach (var k in _dataRate.Keys.ToList())
{
_dataRate[k] = 0;
}
DataRateEvent?.Invoke(_dataRate);
// rewind
Seek(0);
eventTimer.Dispose();
eventTimer = null;
ProgressEvent?.Invoke(0);
}
}
}
}
WinAPI.WinAPITime.TimeEndPeriod(1);
}
/// <summary>
/// Load a recording file
/// </summary>
/// <param name="_filePath">Raw file path</param>
/// <param name="_startTime">out Start date and time</param>
/// <param name="_lastTime">out Last time in recording</param>
/// <returns>Collection of peers recorded in the file</returns>
public ICollection <PlayPeerInfo> LoadFile(string _filePath, out DateTime _startTime, out int _lastTime)
{
if (CurrentState != State.Stoped)
{
throw new InvalidOperationException("Playing in progress. Must stop to load file");
}
filePath = _filePath;
idxFilePath = Path.Combine(Path.GetDirectoryName(filePath), Path.GetFileNameWithoutExtension(filePath)) + ".idx";
// Init stuff
_lastTime = 0;
_startTime = DateTime.MinValue;
timeIndexes.Clear();
int nPeers = 0;
udpSendersOriginal.Clear();
udpSenders.Clear();
_dataRate.Clear();
using (FileStream idxFile = new FileStream(idxFilePath, FileMode.Open, FileAccess.Read))
using (BinaryReader idxBinaryReader = new BinaryReader(idxFile))
{
int time = 0; long position = 0;
Span <byte> auxBuff = stackalloc byte[4096];
// Read DateTime, Secs Interval and Peers info
RecDateTime = _startTime = HelperTools.fromMillis(idxBinaryReader.ReadInt64());
secsIdxInterval = idxBinaryReader.ReadInt32();
nPeers = idxBinaryReader.ReadInt32();
// Read peers
for (int i = 0; i < nPeers; i++)
{
string ID = HelperTools.Bytes2StringWithLength(idxFile);
string IP = HelperTools.Bytes2StringWithLength(idxFile);
int Port = idxBinaryReader.ReadInt32();
udpSenders.Add(HelperTools.GetDeterministicHashCode(ID),
new PlayPeerInfo
{
ID = ID,
IP = IP,
Port = Port
});
udpSendersOriginal.Add(HelperTools.GetDeterministicHashCode(ID),
new PlayPeerInfo
{
ID = ID,
IP = IP,
Port = Port
});
_dataRate[ID] = 0f;
}
Span <byte> timeBuff = stackalloc byte[HelperTools.idxIndexSize];
// Get All times to cache
while (idxFile.Read(timeBuff) == HelperTools.idxIndexSize)
{
time = BinaryPrimitives.ReadInt32LittleEndian(timeBuff);
position = BinaryPrimitives.ReadInt64LittleEndian(timeBuff.Slice(4));
try
{
timeIndexes.Add(time, position);
}
catch (Exception e)
{
logger.Error(e, "Error reading idx file. TimeIndexes");
}
}
_lastTime = lastTime = time;
}
return(udpSenders.Values);
}
