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循环buffer解决网络通信中数据的不完整接收

 网络通信中,数据的获取有时候并不按照你的想法进行,想每一次获取的都是完整的数据帧,但是得到的却是残缺的帧,一个完整的帧分成几段获取到,或者一次获取几个完整帧。如何取得我们要处理的完整的帧,使用循环buffer可以解决这个问题,分享给各位


[csharp] 
// 循环buffer实现数据的接收以及处理  
Byte[] receiveBuffer = new Byte[16];  // 数据接收缓区                     
Byte[] cycleBuffer = new Byte[1024];  // 用来保存数据  
Byte[] frameBuffer = new Byte[16];    // 从cycleBuffer中得到的帧   
Int32 receiveCount;                   // 接收到的数据数  
Int32 indexHead, indexTail;           // 头指针,尾指针  
indexHead = indexTail = 0;              

            // 循环buffer实现数据的接收以及处理
            Byte[] receiveBuffer = new Byte[16];  // 数据接收缓区                  
            Byte[] cycleBuffer = new Byte[1024];  // 用来保存数据
            Byte[] frameBuffer = new Byte[16];    // 从cycleBuffer中得到的帧
            Int32 receiveCount;                   // 接收到的数据数
            Int32 indexHead, indexTail;           // 头指针,尾指针
            indexHead = indexTail = 0;            
[csharp] 
// 将接收到的数据放到循环buffer中去  
for (int i = 0; i < receiveCount; i++) 

    indexTail++; 
    if (indexTail == cycleBuffer.Length) 
    { 
        indexTail = 0; 
    } 
    cycleBuffer[indexTail] = receiveBuffer[i]; 

            // 将接收到的数据放到循环buffer中去
            for (int i = 0; i < receiveCount; i++)
            {
                indexTail++;
                if (indexTail == cycleBuffer.Length)
                {
                    indexTail = 0;
                }
                cycleBuffer[indexTail] = receiveBuffer[i];
            }
[csharp] 
// 开始在循环buffer中取帧--指定字串  
Int32 indexTemp = indexHead; 
while (indexTemp != indexTail) 

    if (cycleBuffer[indexTemp] == (Byte)'$')  // 找到帧  
    { 
        Int32 dec = 0; 
        while (indexHead != indexTemp) 
        { 
            frameBuffer[dec++] = cycleBuffer[indexHead]; 
            indexHead++; 
            if (indexHead == cycleBuffer.Length) 
            { 
                indexHead = 0; 
            } 
        } 
 
        // 处理取出来的一帧数据  
        ........................ 
    } 
    else 
    { 
        indexTemp++; 
        if (indexTemp == cycleBuffer.Length) 
        { 
            indexTemp = 0; 
        } 
    } 

            // 开始在循环buffer中取帧--指定字串
            Int32 indexTemp = indexHead;
            while (indexTemp != indexTail)
            {
                if (cycleBuffer[indexTemp] == (Byte)'$')  // 找到帧
                {
                    Int32 dec = 0;
                    while (indexHead != indexTemp)
                    {
                        frameBuffer[dec++] = cycleBuffer[indexHead];
                        indexHead++;
                        if (indexHead == cycleBuffer.Length)
                        {
                            indexHead = 0;
                        }
                    }

     &nbs

补充:软件开发 , C# ,
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