Lazarus: How to list all the available network connection on a system?

Question

I am writing a program on a Linux system using Lazarus IDE. The program is supposed to connect to the Internet or Intranet. So, I want to display to the user list of all the

Answer 1

The following code does work on my Linux system. It outputs all the available connection point through which you can connect to the Internet or intranet. I modified the code to print out its name and ip address.

#include 
#include 
#include 
#include 
// you may need to include other headers

int main()
{
   struct ifaddrs* interfaces = NULL;
   struct ifaddrs* temp_addr = NULL;
   int success;
   char *name;
   char *address;


  // retrieve the current interfaces - returns 0 on success
  success = getifaddrs(&interfaces);
  if (success == 0)
  {
     // Loop through linked list of interfaces
     temp_addr = interfaces;
     while (temp_addr != NULL)
     {
        if (temp_addr->ifa_addr->sa_family == AF_INET) // internetwork only
        {
            name = temp_addr->ifa_name;
            address = inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr);
        printf("%s %s\n",name,address);
        }

        temp_addr = temp_addr->ifa_next;
     }
  }

  // Free memory
  freeifaddrs(interfaces);
}