/// <summary>
/// Creates a package for a resending
/// </summary>
/// <param name="connectionRecord">Current <see cref="ReliableUdpConnectionRecord"/> (ConnectionRecord)</param>
/// <param name="requestedSequence">Lost packet number </param>
/// <returns>Array of bytes with header and data</returns>
internal static byte[] RetransmissionCreateUdpPayload(ReliableUdpConnectionRecord connectionRecord,
int requestedSequence)
{
//RU: проверка на последний пакет,
//EN: check for last packet
//bool isLast = ((RequestedSequence + 1) - connectionRecord.NumberOfPackets == 0);
bool isLast = ((requestedSequence + 1) == connectionRecord.NumberOfPackets);
//RU: установка размера данных для отправки
//EN: set the size of data for sending
int length = isLast
? connectionRecord.OutcomingStream.Length - requestedSequence * connectionRecord.BufferSize
: connectionRecord.BufferSize;
//RU: создаем заголовок для пакета
ReliableUdpHeader header = CreateReliableUdpHeader(connectionRecord.TransmissionId,
isLast
? ReliableUdpHeaderFlags.LastPacket
: ReliableUdpHeaderFlags.None,
connectionRecord.ReliableUdpMessageType, requestedSequence, 0);
byte[] udpPayload = new byte[length + ReliableUdpHeader.Length];
Array.Copy(header.ToBytes(), udpPayload, ReliableUdpHeader.Length);
Array.Copy(connectionRecord.OutcomingStream, connectionRecord.BufferSize * requestedSequence, udpPayload,
ReliableUdpHeader.Length, length);
return(udpPayload);
}
/// <summary>
/// Sends acknowledge
/// </summary>
/// <exception cref="ArgumentNullException"></exception>
/// <exception cref="ArgumentOutOfRangeException"></exception>
/// <exception cref="ArgumentException"></exception>
/// <exception cref="ObjectDisposedException"></exception>
/// <exception cref="InvalidOperationException"></exception>
/// <exception cref="SocketException"></exception>
internal static void SendAcknowledgePacket(ReliableUdpConnectionRecord connectionRecord,
bool isCheckForLastOk = false)
{
//Debug.WriteLine( "To {0}. Ask {1} | connectionRecord.RcvCurrent {2} | connectionRecord.WLB {3}", connectionRecord.RemoteClient, connectionRecord.RcvCurrent + 1, connectionRecord.RcvCurrent, connectionRecord.WindowLowerBound );
ReliableUdpHeader header = CreateAcknowledgeHeader(connectionRecord);
if (isCheckForLastOk)
{
header.Flags = header.Flags | ReliableUdpHeaderFlags.LastPacket;
}
connectionRecord.Tcb.SendUdp(header.ToBytes(), connectionRecord.RemoteClient);
}
/// <summary>
/// Creates udp payload
/// </summary>
/// <param name="connectionRecord">Current <see cref="ReliableUdpConnectionRecord"/> (ConnectionRecord)</param>
/// <param name="header"><see cref="ReliableUdpHeader"/></param>
/// <returns>Array of bytes with header and data</returns>
internal static byte[] CreateUdpPayload(ReliableUdpConnectionRecord connectionRecord, ReliableUdpHeader header)
{
//byte[] bytes = Header.Flags.HasFlag(ReliableUdpHeaderFlags.LastPacket)
// ? new byte[connectionRecord.OutcomingStream.Length - connectionRecord.RcvCurrent*connectionRecord.BufferSize]
// :new byte[connectionRecord.BufferSize];
//Array.Copy(connectionRecord.OutcomingStream,connectionRecord.BufferSize * connectionRecord.SndCurrent,bytes,0,bytes.Length);
//byte[] udpPayload = new byte[bytes.Length + ReliableUdpHeader.Length];
//Array.Copy( Header.ToBytes(), udpPayload, ReliableUdpHeader.Length );
//Array.Copy( bytes, 0, udpPayload, 0, bytes.Length );
int length = header.Flags.HasFlag(ReliableUdpHeaderFlags.LastPacket)
? connectionRecord.OutcomingStream.Length - connectionRecord.SndNext * connectionRecord.BufferSize
: connectionRecord.BufferSize;
byte[] udpPayload = new byte[length + ReliableUdpHeader.Length];
Array.Copy(header.ToBytes(), udpPayload, ReliableUdpHeader.Length);
Array.Copy(connectionRecord.OutcomingStream, connectionRecord.BufferSize * connectionRecord.SndNext, udpPayload,
ReliableUdpHeader.Length, length);
return(udpPayload);
}
/// <summary>
/// Creates udp payload
/// </summary>
/// <param name="connectionRecord">Current <see cref="ReliableUdpConnectionRecord"/> (ConnectionRecord)</param>
/// <param name="header"><see cref="ReliableUdpHeader"/></param>
/// <returns>Array of bytes with header and data</returns>
internal static byte[] CreateUdpPayload(ReliableUdpConnectionRecord connectionRecord, ReliableUdpHeader header)
{
//byte[] bytes = Header.Flags.HasFlag(ReliableUdpHeaderFlags.LastPacket)
// ? new byte[connectionRecord.OutcomingStream.Length - connectionRecord.RcvCurrent*connectionRecord.BufferSize]
// :new byte[connectionRecord.BufferSize];
//Array.Copy(connectionRecord.OutcomingStream,connectionRecord.BufferSize * connectionRecord.SndCurrent,bytes,0,bytes.Length);
//byte[] udpPayload = new byte[bytes.Length + ReliableUdpHeader.Length];
//Array.Copy( Header.ToBytes(), udpPayload, ReliableUdpHeader.Length );
//Array.Copy( bytes, 0, udpPayload, 0, bytes.Length );
int length = header.Flags.HasFlag(ReliableUdpHeaderFlags.LastPacket)
? connectionRecord.OutcomingStream.Length - connectionRecord.SndNext*connectionRecord.BufferSize
: connectionRecord.BufferSize;
byte[] udpPayload = new byte[length + ReliableUdpHeader.Length];
Array.Copy(header.ToBytes(), udpPayload, ReliableUdpHeader.Length);
Array.Copy(connectionRecord.OutcomingStream, connectionRecord.BufferSize*connectionRecord.SndNext, udpPayload,
ReliableUdpHeader.Length, length);
return udpPayload;
}
