1 /* $OpenBSD: ifnitest.c,v 1.2 2016/08/27 04:29:25 guenther Exp $ */ 2 3 /* Public domain. 2015, Claudio Jeker */ 4 5 #include <sys/types.h> 6 #include <sys/socket.h> 7 #include <net/if.h> 8 #include <err.h> 9 #include <stdio.h> 10 11 int 12 main(int argc, char *argv[]) 13 { 14 char name[IF_NAMESIZE], *ifname; 15 unsigned int lo0index; 16 17 lo0index = if_nametoindex("lo0"); 18 if (lo0index == 0) 19 err(1, "if_nametoindex(lo0)"); 20 ifname = if_indextoname(lo0index, name); 21 if (ifname == NULL || strcmp("lo0", ifname) != 0) 22 err(1, "if_indextoname(%u)", lo0index); 23 24 /* test failures */ 25 if (if_nametoindex("4kingbula") != 0) 26 err(1, "if_nametoindex(4kingbula)"); 27 if (if_indextoname(65536, name) != NULL) 28 err(1, "if_indextoname(%u)", 65536); 29 30 return 0; 31 } 32