在运行时ip服务器的地址

Question

I developed a client task in C and a server task in C. The client needs the server IP address to connect to the server. The problem is: I don't know in advance which machine will run the client and which machine will run the server so I can know the ip address of the server only at runtime My question: how at run time the client will know the ip address of the server?

Answer 1

As a commenter noted, you might just use DNS. If you are not able to obtain a DNS-entry for whatever reasons, or the server and the clients will run on the same network, you might consider using some kind of mDNS, with wich you wont need a DNS-Server with your record up and running. Visit http://en.wikipedia.org/wiki/MDNS#Multicast_DNS for a introductionary overview

Answer 2

Use a third-party broker server, that both the client and server knows about in advance.

Just set up a server anywhere with a known IP address. (Using a cloud server is a cheap and quick option.)

When the server starts, it sends its IP address to the broker server, and when the client starts, it querys the broker server for a server to connect to.

Of course you have to write a protocol for this, but it can be extremely simple.

Answer 3

first of all you must remember how big the network you want to search? and if it will be a bit problem for you then you can use the DNS its really useful.....

Answer 4

如果您的服务器和客户端将在本地网络上运行，请使用这个漂亮的MAC地址：FF-FF-FF-FF-FF-FF ...;）但如果名称保持不变，DNS将是最好的。