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#include <net/if.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <sys/socket.h>
#ifndef SOCK_DGRAM
#define SOCK_DGRAM 2
#endif
char* if_indextoname(unsigned int interface,char* blub) {
struct ifreq ifr;
int fd;
fd=socket(AF_INET6,SOCK_DGRAM,0);
if (fd<0) fd=socket(AF_INET,SOCK_DGRAM,0);
ifr.ifr_ifindex=interface;
if (ioctl(fd,SIOCGIFNAME,&ifr)==0) {
int i;
close(fd);
for (i=0; i<IFNAMSIZ-1; i++)
if (!(blub[i]=ifr.ifr_name[i]))
return blub;
blub[i]=0;
return blub;
}
close(fd);
return 0;
}
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