如何获取C中活动网络接口的列表？

Question

How to get the list of active interface in a system using C? what API or library i need to use? and Can i choose a particular interface to send data in socket programming? if yes then please give an example.

Answer 1

If on Linux you might like to take look at:

int getifaddrs(struct ifaddrs **ifap);

The getifaddrs() function creates a linked list of structures describing the network interfaces of the local system, and stores the address of the first item of the list in *ifap.

Answer 2

You can show all the active network interfaces with ioctl() and its different flags. You can find an exemple here .

You will be able to bind your socket to a specific interface, with setsockopt() . An example can be found here .

Answer 3

On Windows, use GetAdaptersInfo() and/or GetAdaptersAddresses() .

On most POSIX-compatible systems, you can use getifaddrs() .