public Exception Connect()
{
udpClient = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
udpClient.Bind(new IPEndPoint(IPAddress.Parse("0.0.0.0"), udpPort));
recIEpoint = new IPEndPoint(IPAddress.Parse("0.0.0.0"), udpPort);
sndIEpoint = new IPEndPoint(IPAddress.Parse(udpIp), udpPort);
// 创建KCP实例
session = (uint)(new Random(DateTime.Now.Millisecond).Next(1, Int32.MaxValue)) + 1;
mKCP = new KCP(session, rawSend);
// 设置kcp模式
// normal: 0, 40, 2, 1
// fast: 0, 30, 2, 1
// fast2: 1, 20, 2, 1
// fast3: 1, 10, 2, 1
mKCP.NoDelay(nodelay, interval, resend, nc);
mKCP.SetStreamMode(streamMode);
// 设置接收和发送窗大小, 默认都为128
mKCP.WndSize(sndwnd, recwnd);
// 设置冗余长度，默认不使用冗余
if (redlen > 0)
{
redData = new List <byte> [redlen];
Array.Clear(redData, 0, redlen);
int maxdatalen = redlen + recwnd;
int bitmaplen = maxdatalen >> 3;
if (maxdatalen > bitmaplen << 3)
{
bitmaplen++;
}
redbitmap = new byte[bitmaplen];
// 初始化冗余数据buffer
redBuffer = new byte[redlen + 1][];
for (int i = 0; i < redlen + 1; i++)
{
redBuffer[i] = new byte[256];
}
}
// 启动更新定时器
if (writeDelay > 0)
{
updateTimer = new Timer(new TimerCallback(kcpUpdate), null, Timeout.Infinite, Timeout.Infinite);
}
protocolRun = true;
return(null);
}
// 处理接收冗余
private int redRevFmt(byte[] data, int offset, int kcplen)
{
int pnum = 0;
int pDataLen = 0;
UInt32 sn = 0, csn;
KCP.ikcp_decode32u(data, offset + 12, ref sn);
int rIndex = 24 + offset;
if (data[rIndex] == 0xff)
{
rIndex += 1;
}
for (UInt32 i = 0; i < (redlen + 1); i++)
{
if (i == 0 && (data[24 + offset] != 0xff || data[offset + 5] > 0))
{
pDataLen = kcplen - rIndex + offset;
}
else
{
pDataLen = (((int)data[rIndex]) << 8) + data[rIndex + 1] + 2;
}
csn = sn - i;
// 验证是否已被接收，第一个包只记录不做验证
if (i >= 1)
{
if (csn < minredidx)
{
break;
}
if (chkBitmap(csn))
{
continue;
}
if (pDataLen <= 2)
{
continue;
}
}
if (redBuffer[i].Length < 24 + pDataLen)
{
redBuffer[i] = new byte[24 + pDataLen];
}
Array.Copy(data, offset, redBuffer[i], 0, 24);
Array.Copy(data, rIndex, redBuffer[i], 24, pDataLen);
// 修改包数据
KCP.ikcp_encode32u(redBuffer[i], 12, csn);
KCP.ikcp_encode32u(redBuffer[i], 20, (uint)pDataLen);
rIndex += pDataLen;
pnum++;
setBitmap(csn, true);
if (minredidx == csn)
{
while (chkBitmap(minredidx))
{
// 设置为1
setBitmap(minredidx, false);
// 检查下一个是否提交，提交继续往前累加
minredidx++;
}
}
if (rIndex >= kcplen + offset)
{
break;
}
}
return(pnum);
}
