Clicker2-STM32 + net/: Add configurations to support the endpoint and hub roles in a star topology. Fix various things that broke when IPv6 forwarding was enabled.

net/devif/ipv6_forward.c

@@ -39,8 +39,13 @@
 
 #include <nuttx/config.h>
 
+#include <debug.h>
 #include <errno.h>
 
+#include <nuttx/net/netdev.h>
+#include <nuttx/net/netstats.h>
+
+#include "netdev/netdev.h"
 #include "sixlowpan/sixlowpan.h"
 #include "devif/devif.h"
 
@@ -85,8 +90,6 @@ static int ipv6_packet_conversion(FAR struct net_driver_s *dev,
 #ifdef CONFIG_NET_UDP
       if (ipv6->proto == IP_PROTO_UDP)
         {
-          FAR struct ipv6_hdr_s *ipv6 = (FAR struct ipv6_hdr_s *)dev->d_buf;
-
           /* Let 6LoWPAN convert IPv6 UDP output into IEEE802.15.4 frames. */
 
           sixlowpan_udp_send(dev, fwddev, ipv6);

net/devif/ipv6_input.c

@@ -250,6 +250,9 @@ int ipv6_input(FAR struct net_driver_s *dev)
   FAR struct ipv6_hdr_s *ipv6 = IPv6BUF;
   uint16_t hdrlen;
   uint16_t pktlen;
+#ifdef CONFIG_NET_IPFORWARD
+  int ret;
+#endif
 
   /* This is where the input processing starts. */
 
@@ -350,7 +353,7 @@ int ipv6_input(FAR struct net_driver_s *dev)
 #ifdef CONFIG_NET_IPFORWARD
           /* Not destined for us, try to forward the packet */
 
-          ret = ipv6forward(dev, ipv6);
+          ret = ipv6_forward(dev, ipv6);
           if (ret >= 0)
             {
               /* The packet was forwarded.  Return success; d_len will