检查通过程序的C管道 - 边界情况 - 编程

I'm receiving from socket A and writing that to socket B on the fly (like a proxy server might). I would like to inspect and possibly modify data passing through. My question is how to handle border cases, ie where the regular expression I'm searching for would match between two successive socket A read and socket B write iterations.

我从套接字A接收并将其写入套接字B(如代理服务器可能)。我想检查并可能修改通过的数据。我的问题是如何处理边界情况,即我正在搜索的正则表达式在两个连续的套接字A读取和套接字B写入迭代之间匹配。

char buffer[4096]
int socket_A, socket_B

/* Setting up the connection goes here */

for(;;) {

    recv(socket_A, buffer, 4096, 0);

    /* Inspect, and possibly modify buffer */

    send(socket_B, buffer, 4096, 0);

    /* Oops, the matches I was looking for were at the end of buffer,
     * and will be at the beginning of buffer next iteration :( */

}

6 个解决方案

#1

My suggestion: have two buffers, and rotate between them:

我的建议:有两个缓冲区,并在它们之间旋转:

Recv buffer 1

Recv缓冲区1

Recv buffer 2

Recv缓冲区2

Process.
Send buffer 1

发送缓冲区1

Recv buffer 1

Recv缓冲区1

Process, but with buffer 2 before buffer 1.

处理,但在缓冲区1之前使用缓冲区2。

Send buffer 2

发送缓冲区2

Goto 2.

Or something like that?

或类似的东西?

检查通过程序的C管道 - 边界情况

6 个解决方案

#1

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