private byte[] kcpRead()
{
while (udpClient != null)
{
var size = mKCP.PeekSize();
if (size > 0)
{
lock (mKCP)
{
if (size > mRecvBuffer.Length)
{
mRecvBuffer = new byte[(size * 3) / 2];
}
var n = mKCP.Recv(mRecvBuffer, 0, size);
var recvBytes = (((int)mRecvBuffer[0]) << 8) + mRecvBuffer[1];
if (recvBytes <= n - 2)
{
byte[] data = new byte[recvBytes];
Array.Copy(mRecvBuffer, Const.PackageHeaderLength, data, 0, recvBytes);
return(data);
}
}
}
var reclen = rawRead();
int inputN = 0;
lock (mKCP)
{
int sidx = 0;
while (sidx < reclen)
{
uint datalen = 0;
KCP.ikcp_decode32u(sRecvBuffer, sidx + 20, ref datalen);
int kcplen = (int)datalen + 24;
if (redlen <= 0 || sRecvBuffer[4 + sidx] != KCP.IKCP_CMD_PUSH)
{
inputN = mKCP.Input(sRecvBuffer, sidx, kcplen, true, ackNoDelay);
}
else
{
int pnum = redRevFmt(sRecvBuffer, sidx, kcplen);
for (int i = 0; i < pnum; i++)
{
uint tDataLen = 0;
KCP.ikcp_decode32u(redBuffer[i], 20, ref tDataLen);
inputN = mKCP.Input(redBuffer[i], 0, (int)tDataLen + 24, true, ackNoDelay);
}
}
sidx += kcplen;
}
}
if (inputN < 0)
{
DebugLogger.Debug($"input err resinput {inputN}");
}
}
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);
}