Merge pull request #20784 from ML-PA-Consulting-GmbH/dl/riot/20240715…

…__nib__static_ll_addr_excludes

nib.c: add interface selection rules for static link local address assignment

sys/include/net/gnrc/ipv6.h

@@ -181,6 +181,28 @@ extern "C" {
 #define CONFIG_GNRC_IPV6_STATIC_LLADDR_IS_FIXED 0
 #endif
 
+/**
+ * @brief   Select interfaces by driver types for setting static link local
+ *          addresses
+ *
+ * This option allows to explicitly include interfaces by matching their
+ * netdev driver types, encoded in a bitmask.
+ * See @ref netdev_type_t for possible values of netdev driver types.
+ * Matching NETDEV_ANY will include all netdev driver types.
+ *
+ * Example usage, includes AT86RF215 and MRF24J40 driver types:
+ *
+ * @code{.c}
+ * #define CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK \
+ *    ((1UL << NETDEV_AT86RF215) | (1UL << NETDEV_MRF24J40))
+ * @endcode
+ *
+ * A value of 0 will switch this selection feature off.
+ */
+#ifndef CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK
+#define CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK 0ULL
+#endif
+
 /**
  * @brief Message queue size to use for the IPv6 thread.
  */

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

@@ -116,6 +116,23 @@ void gnrc_ipv6_nib_init(void)
 static void _add_static_lladdr(gnrc_netif_t *netif)
 {
 #ifdef CONFIG_GNRC_IPV6_STATIC_LLADDR
+#if (CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK) > 0
+#ifndef MODULE_NETDEV_REGISTER
+#error "Use of CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK requires MODULE_NETDEV_REGISTER"
+#endif
+    if (! (((CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK) & (1ULL << netif->dev->type)) ||
+           ((CONFIG_GNRC_IPV6_STATIC_LLADDR_NETDEV_MASK) & (1ULL << NETDEV_ANY)))) {
+        DEBUG("nib: interface #%u: not setting static link-local address "
+                "(netdev type %u not included)\n",
+                netif->pid, netif->dev->type);
+        return;
+    }
+#endif
+    DEBUG("nib: interface #%u: adding static link-local address \"%s\"%s\n",
+            netif->pid,
+            CONFIG_GNRC_IPV6_STATIC_LLADDR,
+            IS_ACTIVE(CONFIG_GNRC_IPV6_STATIC_LLADDR_IS_FIXED) ?
+                " (fixed)" : " (+ interface number)");
     /* parse addr from string and explicitly set a link local prefix
      * if ifnum > 1 each interface will get its own link local address
      * with CONFIG_GNRC_IPV6_STATIC_LLADDR + i