RE: interface listing code

Vot novaja modifikacija etogo koda, kotoraja ne tol'ko poluchaet spisok
interfeisov, no I IP adres, masku I tip dlja kazdogo interfeisa.
Poprobujte na raznih operacionkah. Esli ne budet rabotat', to bilo bi
zdorovo, esli bi kto-nibud' razobralsja, kak sdelat', chtobi etot kod
rabotal.

Viktor

-----------
#include <stdio.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if.h>

int main(int argc, char *argv[])
{
   struct if_nameindex *p;
   struct ifreq ifrq;
   struct sockaddr_in *sa;
   int i, fd;

   p = if_nameindex();
   if (p != NULL)
   {
      fd = socket(AF_INET, SOCK_DGRAM, 0);
      if (fd == -1)
      {
         perror("socket");
         return 1;
      }
      
      for(i = 0; p[i].if_index != 0; i++)
      {
         printf("%d %s ", p[i].if_index, p[i].if_name);

         strcpy(ifrq.ifr_name, p[i].if_name);

         if (ioctl(fd, SIOCGIFADDR, &ifrq) == 0)
         {
            sa = (struct sockaddr_in *)&ifrq.ifr_addr;
            printf("%s ", inet_ntoa(sa->sin_addr));
         }

         if (ioctl(fd, SIOCGIFNETMASK, &ifrq) == 0)
         {
            sa = (struct sockaddr_in *)&ifrq.ifr_addr;
            printf("%s ", inet_ntoa(sa->sin_addr));
         }

         if (ioctl(fd, SIOCGIFHWADDR, &ifrq) == 0)
         {
            printf("%d ", ifrq.ifr_hwaddr.sa_family);
         }
         printf("\n");
      }
      close(fd);
      if_freenameindex(p);
   }
   else
   {
      perror("if_nameindex");
   }
   return 0;
}
Received on Tue May 18 2004 - 10:17:38 EEST