linux下叉socketpair SOCK_DGRAM [英] linux fork socketpair sock_dgram

问题描述

我是新来socketpairs，我需要我的孩子每次从结构到parent.I传递信息被告知这可以使用SOCK_DGRAM做，但我不知道该怎么办它。我看着在互联网上但我找不到一个具体的example.Can请你告诉例如锄头，你可以传递给家长的结构做出来的2个整数和一个字符串可能吗？我只想一个例子，所以我能理解，我怎么能建立这种socketpair并通过it.Thank信息发送您

I'm new to socketpairs and I need my children each to pass information from a structure to the parent.I was told this can be done using SOCK_DGRAM but I don't know how to do it.I looked over the internet but i couldn't find a concrete example.Can you please show for example hoe can you pass to the parent a structure made out of 2 ints and a string maybe ?I just want an example so I can understand how I could build this kind of socketpair and send information through it.Thank you

推荐答案

如何以下内容：

int sockets[2];
if (socketpair(AF_INET, SOCK_DGRAM, 0, sockets) != -1)
{
    int res = fork();

    if (res == 0)
    {
        /* In child process */

        /* We only need one socket, so close the other */
        close(sockets[0]);

        struct some_structure my_struct;

        write(sockets[1], &my_struct, sizeof(my_struct));

        /* All done */
        exit(0);
    }
    else if (res > 0)
    {
        /* In parent process */

        /* We only need one socket, so close the other */
        close(sockets[1]);

        struct some_structure my_struct;

        read(sockets[0], &my_struct, sizeof(my_struct));
    }
}

以上code不检查或处理，错误。它不能处理包含结构的指针，使用数组结构是好的，但。

The above code doesn't check for, or handle, errors. It can't handle structures containing pointers, structures using arrays are okay though.

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