diff options
| -rw-r--r-- | lib/libc/net/if_indextoname.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/libc/net/if_indextoname.c b/lib/libc/net/if_indextoname.c index 908e771c4a4e..454823e5e016 100644 --- a/lib/libc/net/if_indextoname.c +++ b/lib/libc/net/if_indextoname.c @@ -66,6 +66,11 @@ if_indextoname(unsigned int ifindex, char *ifname) struct ifaddrs *ifaddrs, *ifa; int error = 0; + if (ifindex == 0) { + errno = ENXIO; + return(NULL); + } + if (getifaddrs(&ifaddrs) < 0) return(NULL); /* getifaddrs properly set errno */ |