private unsafe bool ProcessReceice(SocketAsyncEventArgs e, LinkInfo link)
{
var pi = e.ReceiveMessageFromPacketInfo;
if (e.BytesTransferred == 0)
{
//接收0转过去的,这个e不给他回收
ProcessRecvZero(link);
return(true);
}
if (option.WithPackageLength16M == false)
{
byte[] data = new byte[e.BytesTransferred];
fixed(byte *src = e.Buffer, dest = data)
{
System.Buffer.MemoryCopy(src + e.Offset, dest, e.BytesTransferred, e.BytesTransferred);
}
this.OnRecv(link.Handle, data);
}
else
{
var seek = 0;
while (seek < e.BytesTransferred)
{
if (link.lastPackageSize == 0)//fill len
{
if (link.lastPackageSizeSeek == 0)
{
if (e.BytesTransferred - seek >= 4)//长度字节数够了
{
link.lastPackageSize = BitConverter.ToUInt32(e.Buffer, e.Offset + seek);
seek += 4;
link.lastPackege = new byte[link.lastPackageSize];
link.lastPackegeSeek = 0;
if (link.lastPackageSize > 16 * 1024 * 1024)
{
throw new Exception("err package size is too big");
}
}
else //长度不够，读部分长度
{
link.lastPackageSizeSeek = (byte)(e.BytesTransferred - seek);
link.lastPackageSizeBuf = new byte[4];
for (var i = 0; i < link.lastPackageSizeSeek; i++)
{
link.lastPackageSizeBuf[i] = e.Buffer[seek + i];
}
seek += (int)link.lastPackageSizeSeek;
continue;//不够长跳出逻辑
}
}
else //长度不完整，接着读
{
var len = (byte)Math.Min(4 - link.lastPackageSizeSeek, e.BytesTransferred - seek);
for (var i = 0; i < len; i++)
{
link.lastPackageSizeBuf[link.lastPackageSizeSeek + i] =
e.Buffer[e.Offset + seek + i];
}
seek += len;
link.lastPackageSizeSeek += len;
if (link.lastPackageSizeSeek == 4)
{
link.lastPackageSizeSeek = 0;
link.lastPackageSize = BitConverter.ToUInt32(link.lastPackageSizeBuf, 0);
link.lastPackege = new byte[link.lastPackageSize];
link.lastPackegeSeek = 0;
}
else
{
continue;//不够长跳出逻辑
}
}
}
if (seek < e.BytesTransferred)//fill package
{
var len = (uint)Math.Min(link.lastPackageSize - link.lastPackegeSeek, e.BytesTransferred - seek);
fixed(byte *src = e.Buffer, dest = link.lastPackege)
{
System.Buffer.MemoryCopy(src + e.Offset + seek, dest + link.lastPackegeSeek, e.BytesTransferred, len);
}
link.lastPackegeSeek += len;
seek += (int)len;
}
if (link.lastPackegeSeek == link.lastPackageSize) //finish package
{
link.lastPackageSize = 0;
link.lastPackegeSeek = 0;
this.OnRecv(link.Handle, link.lastPackege);
}
}
}
try
{
var asyncr = link.Socket.ReceiveAsync(link.recvArgs);
return(asyncr);
}
catch (Exception err)
{
logger.Error("error ProcessReceice. continue." + e.SocketError);
return(true);
}
}