private void WriteRecv(IBufferWriter <byte> writer, Segment seg)
{
var curCount = (int)seg.len;
var target = writer.GetSpan(curCount);
seg.data.CopyTo(target);
SegmentManager.Free(seg);
writer.Advance(curCount);
}
/// <summary>
/// 这个函数不检查任何参数
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
int UncheckRecv(Span <byte> buffer)
{
var recover = false;
if (rcv_queue.Count >= rcv_wnd)
{
recover = true;
}
#region merge fragment.
/// merge fragment.
var recvLength = 0;
lock (rcv_queueLock)
{
var count = 0;
foreach (var seg in rcv_queue)
{
seg.data.CopyTo(buffer.Slice(recvLength));
recvLength += (int)seg.len;
count++;
int frg = seg.frg;
SegmentManager.Free(seg);
if (frg == 0)
{
break;
}
}
if (count > 0)
{
rcv_queue.RemoveRange(0, count);
}
}
#endregion
Move_Rcv_buf_2_Rcv_queue();
#region fast recover
/// fast recover
if (rcv_queue.Count < rcv_wnd && recover)
{
// ready to send back IKCP_CMD_WINS in ikcp_flush
// tell remote my window size
probe |= IKCP_ASK_TELL;
}
#endregion
return(recvLength);
}