public bool SendData(byte[] bs)
{
if (m_userQueue.Available > bs.Length)
{
m_userQueue.PushValues(bs);
return(true);
}
return(false);
}
/// <summary>
/// 处理Telnet命令并返回数据
/// </summary>
/// <param name="recv"></param>
/// <param name="send"></param>
/// <param name="data"></param>
void ParseTelnetCommand(RingQueue <byte> recv, RingQueue <byte> send, RingQueue <byte> data)
{
while (recv.Count > 0 && data.Available > 0)
{
var b = recv.Shift();
if (b == IAC)
{
//命令处理
if (recv.Count < 2)
{
recv.Unshift(b);
break;
}
var action = recv.Shift();
var option = recv.Shift();
switch (option)
{
case ECHO:
case NOGA:
case TERMTYPE:
case NAWS:
switch (action)
{
case WILL:
send.PushValues(new byte[] { IAC, DO, option });
break;
case DO:
send.PushValues(new byte[] { IAC, WILL, option });
break;
case SB:
switch (option)
{
case TERMTYPE:
if (recv.Count < 3)
{
recv.UnshiftValues(new byte[] { option, action, b });
break;
}
if (recv.Shift() == 1)
{
recv.Shift(); recv.Shift();
//发送客户端型号
send.PushValues(new byte[] { IAC, SB, TERMTYPE, 0 });
send.PushValues(Encoding.Default.GetBytes(TermType));
send.PushValues(new byte[] { IAC, SE });
}
break;
}
break;
}
if (action == WILL && option == NAWS)
{
//发送窗体大小
send.PushValues(new byte[] { IAC, SB, NAWS,
(byte)((ScreenColumns >> 8) & 0xFF), (byte)(ScreenColumns & 0xFF),
(byte)((ScreenRows >> 8) & 0xFF), (byte)(ScreenRows & 0xFF), IAC, SE });
}
break;
default:
//拒绝其他一切选项
switch (action)
{
case WILL:
case WONT:
send.PushValues(new byte[] { IAC, DONT, option });
break;
case DO:
case DONT:
send.PushValues(new byte[] { IAC, WONT, option });
break;
}
break;
}
}
else
{
//丢给VT220解析器
data.Push(b);
}
}
}