net_if: proper u/l-bit inversion for short addresses

sys/net/link_layer/net_if/net_if.c

@@ -433,20 +433,7 @@ int net_if_get_eui64(net_if_eui64_t *eui64, int if_id, int force_generation)
          * the local/universal bit to 1. */
         eui64->uint32[0] = HTONL(0x020000ff);
         eui64->uint16[2] = HTONS(0xfe00);
-
-        if (sizeof(hwaddr) == 2) {
-            eui64->uint16[3] = HTONS(hwaddr);
-        }
-        else if (sizeof(hwaddr) == 1) {
-            eui64->uint8[6] = 0;
-            eui64->uint8[7] = (uint8_t)hwaddr;
-        }
-        else {
-            DEBUG("Error on EUI-64 generation: do not know what to do with "
-                  "hardware address of length %d\n", sizeof(hwaddr));
-            return 0;
-        }
-
+        eui64->uint16[3] = HTONS(hwaddr);
     }
 
     return 1;

sys/net/network_layer/sixlowpan/ip.c

@@ -690,15 +690,7 @@ ipv6_addr_t *ipv6_addr_set_by_eui64(ipv6_addr_t *out, int if_id,
 
     if (net_if_get_eui64((net_if_eui64_t *) &out->uint8[8], if_id,
                          force_generation)) {
-#ifdef MODULE_SIXLOWPAN
-
-        if (!sixlowpan_lowpan_eui64_to_short_addr((net_if_eui64_t *)&out->uint8[8])) {
-            out->uint8[8] ^= 0x02;
-        }
-
-#else
         out->uint8[8] ^= 0x02;
-#endif
         return out;
     }
     else {