nib.c: add exclude rules for static link local addresses

sys/include/net/gnrc/ipv6.h

@@ -181,6 +181,42 @@ extern "C" {
 #define CONFIG_GNRC_IPV6_STATIC_LLADDR_IS_FIXED 0
 #endif
 
+/**
+ * @brief   Exclude certain driver types when setting static link local
+ *          addresses
+ *
+ * This option allows to exclude netdev driver types via a bitmask.
+ * See @ref netdev_type_t for possible values.
+ * Matching NETDEV_ANY will exclude all netdev driver types.
+ *
+ * Example usage, excludes AT86RF215 and MRF24J40 driver types:
+ *
+ * @code{.c}
+ * #define CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK \
+ *    ((1UL << NETDEV_AT86RF215) | (1UL << NETDEV_MRF24J40))
+ * @endcode
+ */
+#ifndef CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK
+#define CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK 0UL
+#endif
+
+/**
+ * @brief   Exclude certain interface numbers when setting static link local
+ *          addresses
+ *
+ * This option allows to exclude interface types via a bitmask.
+ *
+ * Example usage, excludes interfaces 6 and 8:
+ *
+ * @code{.c}
+ * #define CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_IFACE_MASK \
+ *    ((1UL << 6) | (1UL << 8))
+ * @endcode
+ */
+#ifndef CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_IFACE_MASK
+#define CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_IFACE_MASK 0UL
+#endif
+
 /**
  * @brief Message queue size to use for the IPv6 thread.
  */

sys/net/gnrc/network_layer/ipv6/nib/nib.c

@@ -115,6 +115,26 @@ void gnrc_ipv6_nib_init(void)
 
 static void _add_static_lladdr(gnrc_netif_t *netif)
 {
+#if defined(CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK) && \
+    CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK > 0
+#ifndef MODULE_NETDEV_REGISTER
+#error "CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK requires MODULE_NETDEV_REGISTER"
+#endif
+    if (CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK & (1ULL << NETDEV_ANY) ||
+            CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_NETDEV_MASK & (1ULL << netif->dev->type)) {
+        DEBUG("nib: Interface %u is of excluded type %u, not adding static link-local address\n",
+              netif->pid, netif->dev->type);
+        return;
+    }
+#endif
+#if defined(CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_IFACE_MASK) && \
+    CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_IFACE_MASK > 0
+    if (CONFIG_GNRC_IPV6_STATIC_LLADDR_EXCLUDE_IFACE_MASK & (1ULL << netif->pid)) {
+        DEBUG("nib: Interface %u (type %u) in exclude list, not adding static link-local address\n",
+              netif->pid, netif->dev->type);
+        return;
+    }
+#endif
 #ifdef CONFIG_GNRC_IPV6_STATIC_LLADDR
     /* parse addr from string and explicitly set a link local prefix
      * if ifnum > 1 each interface will get its own link local address