[SQUASH ME] ipv6_nc: add debug messages for translate

RIOT-OS · Mar 15, 2015 · c790ee9 · c790ee9
1 parent fd14ad2
commit c790ee9
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/sys/net/network_layer/ng_ipv6/nc/ng_ipv6_nc.c b/sys/net/network_layer/ng_ipv6/nc/ng_ipv6_nc.c
@@ -187,7 +187,11 @@ int ng_ipv6_nc_translate_mc(void *l2_addr, size_t l2_addr_len,
 {
     uint8_t *l2_u8 = l2_addr;
 
+    DEBUG("ipv6_nc: translate to multicast address\n");
+
     if (!ng_ipv6_addr_is_multicast(ipv6_addr)) {
+        DEBUG("ipv6_nc: %s is no multicast address\n",
+              ng_ipv6_addr_to_str(addr_str, ipv6_addr, sizeof(addr_str)));
         return -EADDRNOTAVAIL;
     }
 
@@ -199,12 +203,17 @@ int ng_ipv6_nc_translate_mc(void *l2_addr, size_t l2_addr_len,
             l2_u8[1] = 0xff;
 
         case 1:
+            DEBUG("ipv6_nc: return generic broadcast address (all 0xff) of length %zu\n",
+                  l2_addr_len);
             l2_u8[0] = 0xff;
             break;
 
         case 6:
             l2_u8[0] = l2_u8[1] = 0x33;
             memcpy(l2_u8 + 2, ipv6_addr->u8 + 12, sizeof(uint32_t));
+            DEBUG("ipv6_nc: return IPv6 multicast MAC-48 address: "
+                  "33:33:%02x:%02x:%02x:%02x\n", l2_u8[2], l2_u8[3], l2_u8[4],
+                  l2_u8[5]);
             break;
 
         case 8:
@@ -213,9 +222,14 @@ int ng_ipv6_nc_translate_mc(void *l2_addr, size_t l2_addr_len,
             l2_u8[3] = 0xff;
             l2_u8[4] = 0xfe;
             memcpy(l2_u8 + 4, ipv6_addr->u8 + 13, sizeof(uint32_t));
+            DEBUG("ipv6_nc: return IPv6 multicast EUI-64 address: "
+                  "33:33:%02x:ff:fe:%02x:%02x:%02x\n", l2_u8[2], l2_u8[3], l2_u8[4],
+                  l2_u8[5]);
             break;
 
         default:
+            DEBUG("ipv6_nc: no support for link-layer address of length %zu\n",
+                  l2_addr_len);
             return -EINVAL;
     }