如何在C ++中向前移植？

Question

我有一个套接字程序需要打开端口1002，我想知道如何在Windows上的C ++中向前移植，以便我可以自由使用此端口？

Answer 1

Port forwarding is done upstream of the client system, typically on the router.

I believe some applications use Universal Plug and Play to communicate with the upstream router to open a port publicly but you'll have to do a lot of research to see how it's done: I haven't the slightest.

Answer 2

So, you need UPnP or NAT-PMP. Your system may have libraries for doing those protocols, or you can use muniupnp , which has both a server to run on a Linux or BSD box to test against, and a client library.

There is no guarantee that will work, so you may need to go further and use STUN, TURN or ICE. There's a library for doing those things here .

And always remember, sometimes it's just impossible. Implement IPv6 as well, sometimes that works when IPv4 doesn't. Encourage users to install v6 and Teredo.

Answer 3

Starting with Windows XP, Microsoft offers a UPnP library . It's actually fairly complicated to use as the library just offers the basics of communicating with network devices. You will have to study the various UPnP specifications in order to perform device-specific tasks such as port forwarding. Believe me, this is a lot of hard work to do to accomplish relatively little; better to just put it in your documentation somewhere that the user might have to consult their router manual in order to forward the necessary ports. This is what almost everybody does.

Answer 4

我相信最流行的方法是编写文档，告诉用户在防火墙上打开哪个端口。

Answer 5

您不能使用编程语言进行转发，这是在路由器上设置的。