Networking: drivers/net/loopback.c: Eliminate a warning. ...

Networking: drivers/net/loopback.c: Eliminate a warning.  net/netdev/netdev_ifconfig.c: Was not returning all of the address info.

drivers/net/loopback.c

@@ -133,12 +133,10 @@ static int lo_ifup(FAR struct net_driver_s *dev);
 static int lo_ifdown(FAR struct net_driver_s *dev);
 static void lo_txavail_work(FAR void *arg);
 static int lo_txavail(FAR struct net_driver_s *dev);
-#if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6)
-static int lo_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac);
 #ifdef CONFIG_NET_IGMP
+static int lo_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac);
 static int lo_rmmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac);
 #endif
-#endif
 
 /****************************************************************************
  * Private Functions
@@ -455,7 +453,7 @@ static int lo_txavail(FAR struct net_driver_s *dev)
  *
  ****************************************************************************/
 
-#if defined(CONFIG_NET_IGMP) || defined(CONFIG_NET_ICMPv6)
+#ifdef CONFIG_NET_IGMP
 static int lo_addmac(FAR struct net_driver_s *dev, FAR const uint8_t *mac)
 {
   /* There is no multicast support in the loopback driver */

net/netdev/netdev_ifconf.c

@@ -134,8 +134,11 @@ static int ifconf_ipv4_callback(FAR struct net_driver_s *dev, FAR void *arg)
             * transferred is returned in ifc_len.
             */
 
-          strncpy(req->ifr_name, dev->d_ifname, IFNAMSIZ);
-          net_ipv4addr_copy(inaddr->sin_addr.s_addr, dev->d_ipaddr);
+           strncpy(req->ifr_name, dev->d_ifname, IFNAMSIZ);
+
+           inaddr->sin_family = AF_INET;
+           inaddr->sin_port   = 0;
+           net_ipv4addr_copy(inaddr->sin_addr.s_addr, dev->d_ipaddr);
          }
 
        /* Increment the size of the buffer in any event */
@@ -206,6 +209,9 @@ static int ifconf_ipv6_callback(FAR struct net_driver_s *dev, FAR void *arg)
             */
 
            strncpy(req->lifr_name, dev->d_ifname, IFNAMSIZ);
+
+           inaddr->sin6_family = AF_INET6;
+           inaddr->sin6_port   = 0;
            net_ipv6addr_copy(inaddr->sin6_addr.s6_addr16, dev->d_ipv6addr);
          }