Iovlen     uint64
	Control    *byte
	Controllen uint64
	Flags      int32
	_          [4]byte
}

type Cmsghdr struct {
	Len   uint64
	Level int32
	Type  int32
}

type ifreq struct {
	Ifrn [16]byte
	Ifru [24]byte
}

const (
	SizeofSockaddrNFCLLCP = 0x60
	SizeofIovec           = 0x10
	SizeofMsghdr          = 0x38
	SizeofCmsghdr         = 0x10
)

const (

index 8ba5eae..b620d21 100644
--- a/sysdeps/unix/sysv/linux/if_index.c
+++ b/sysdeps/unix/sysv/linux/if_index.c
@@ -38,12 +38,19 @@ __if_nametoindex (const char *ifname)
   return 0;
 #else
   struct ifreq ifr;
+  if (strlen (ifname) >= IFNAMSIZ)
+    {
+      __set_errno (ENODEV);
+      return 0;
+    }
+
+  strncpy (ifr.ifr_name, ifname, sizeof (ifr.ifr_name));
+
   int fd = __opensock ();

(Eq16  x y) => (SEQZ (SUB <x.Type> (ZeroExt16to64 x) (ZeroExt16to64 y)))
(Eq8   x y) => (SEQZ (SUB <x.Type> (ZeroExt8to64  x) (ZeroExt8to64  y)))
(Eq(64|32)F ...) => (FEQ(D|S) ...)

(NeqPtr x y) => (Not (EqPtr x y))
(Neq64  x y) => (Not (Eq64  x y))
(Neq32  x y) => (Not (Eq32  x y))
(Neq16  x y) => (Not (Eq16  x y))
(Neq8   x y) => (Not (Eq8   x y))