C++实现TCP客户端及服务器Recv数据筛选处理详解

int nTotalSize = 0;
while(this->JudgeValidData(vetRecvData, nTotalSize) == ture)
{
    //接收到了完整包，对包进行处理
}

char ch0 = vetRecvData[0]; //系统标识
char ch1 = vetRecvData[1]; //标识1
char ch2 = vetRecvData[2]; //标识2
if((ch0 == 0x5A) && (ch1 == 0xFC) && (ch2 == 0xFB))
{
    //包头正确，进行后续处理
}
else
{
    //包头不正确，剔除数据，默认剔除缓冲区的第一个字节数据
    std::vector<char>::iterator itbegin = vetRecvData.begin();
    vetRecvData.erase(itbegin);
    //重新调用当前函数，递归判断
    return JudgeValidData(vetRecvData, nTotalSize);
}

int ndatalen = (unsigned char)pThreadParam->vetRecvData[16] * 256 *256+ (unsigned char)pThreadParam->vetRecvData[17]*256 + (unsigned char)pThreadParam->vetRecvData[18];
nTotalSize = 19 + ndatalen + 1;

int nTotalSize = 0;
while(this->JudgeValidData(vetRecvData, nTotalSize) == ture)
{
    //接收到了完整包，对包进行处理
}

int nTotalSize = 0;
while (this->JudgeValidData(vetRecvData, nTotalSize) == true)
{
	//这一条数据被处理之后，使用一个临时容器存储 处理的 通讯数据
	std::vector<char> vetValidData;
	char* chUseData = new char[nTotalSize];
	memset(chUseData, 0, nTotalSize);
	for (int i = 0; i < vetRecvData.size(); i++)
	{
		if (i < nTotalSize)
		{
			chUseData[i] = vetRecvData[i];
		}
		else
			vetValidData.push_back(vetRecvData[i]);
	}
	//删除 存储所有接收字节的容器 中的数据
	vetRecvData.clear();
	vetRecvData = vetValidData; //重新更新数据信息
	//接收的是整包数据时，进行实际的数据处理
	ProcessingPancelValidData(chUseData, nTotalSize);
	delete[] chUseData;
	chUseData = nullptr;
}