将套接字从父进程传递给子进程 [英] Pass socket from parent to child process

问题描述

我的项目有两个程序：父项和子项。



父项：从客户端有一个套接字等待连接。当Parent接受连接时，它会生成Child进程并将套接字传递给Child。

My project has two programs: Parent and Child.

In Parent: has one socket waiting connection from client. When Parent accepts connection, it generates Child process and passes socket to Child.

SOCKET newSock = accept(listenSock, 0, 0);
char cmd[1024];
sprintf(cmd, "%s %d", "Child.exe", newSock);
result = CreateProcess( NULL, cmd, NULL, NULL, TRUE, CREATE_NEW_CONSOLE, NULL, NULL, &startupInfo, &processInformation);

客户端和子进程传输数据成功。



但是当我搜索谷歌时，有些人写道：必须调用函数WSADuplicateSocket（），然后将套接字传递给子进程。 />


请求帮我展示两种方式之间的差异？

如果我不调用WSADuplicateSocket（）我的程序是否有任何错误？



谢谢！

Client and Child process transfer data successfully.

But when I searches Google and some people wrote that : must call function WSADuplicateSocket(), after that pass socket to child process.

Pleas help me show the different between the two ways?
If i don't call WSADuplicateSocket() whether my program has any error or not?

Thanks!

推荐答案

问题/错误是您的2个进程共享同一个套接字。如果其中任何一个正在关闭套接字，则其他进程存在巨大问题。



我的解决方案是通过仅在子进程中打开套接字来清除所有权，或者按照建议使用API​​。

the problem/error is that your 2 processes are sharing the same socket. If any of them is closing the socket the other process has a huge problem.

My solution wold be to "clear" the ownership by opening the socket ONLY in the child process or use the API as recommended.

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