/* This interface, AFAICT, only supports AF_INET addresses,
* except on AIX. For Solaris, we could use SIOCGLIFCONF. */
- /* FIXME: for now, we bail out if family is not AF_INET since
+ /* Bail out if family is neither AF_INET nor AF_UNSPEC since
* ioctl() technique supports non-IPv4 interface addresses on
- * a small number of niche systems only. */
- if (family != AF_INET)
+ * a small number of niche systems only. If family is AF_UNSPEC,
+ * fall back to getting AF_INET addresses only. */
+ if (family == AF_UNSPEC)
+ family = AF_INET;
+ else if (family != AF_INET)
return NULL;
fd = socket(family, SOCK_DGRAM, 0);