Merge pull request #18069 from yarrick/lwip_netif_opt

pkg/lwip: Add basic version of netif_get/set_opt

pkg/lwip/contrib/_netif.c

@@ -13,6 +13,7 @@
  *
  * @file
  * @author  Benjamin Valentin <benjamin.valentin@ml-pa.com>
+ * @author  Erik Ekman <eekman@google.com>
  */
 
 #include "fmt.h"
@@ -32,4 +33,54 @@ int netif_get_name(netif_t *iface, char *name)
     return res;
 }
 
+int netif_get_opt(netif_t *iface, netopt_t opt, uint16_t context,
+                  void *value, size_t max_len)
+{
+    (void)context;
+    lwip_netif_t *lwip_netif = (lwip_netif_t*) iface;
+    struct netif *netif = &lwip_netif->lwip_netif;
+    struct netdev *dev = netif->state;
+    int res = -ENOTSUP;
+    switch (opt) {
+#ifdef MODULE_LWIP_IPV6
+        case NETOPT_IPV6_ADDR: {
+                assert(max_len >= sizeof(ipv6_addr_t));
+                ipv6_addr_t *tgt = value;
+
+                res = 0;
+                for (unsigned i = 0;
+                     ((res + sizeof(ipv6_addr_t)) <= max_len) &&
+                     (i < LWIP_IPV6_NUM_ADDRESSES);
+                     i++) {
+                    if (netif_ip6_addr_state(netif, i) != IP6_ADDR_INVALID) {
+                        memcpy(tgt, &(netif_ip6_addr(netif, i)->addr), sizeof(ipv6_addr_t));
+                        res += sizeof(ipv6_addr_t);
+                        tgt++;
+                    }
+                }
+            }
+            break;
+#endif
+        default:
+            break;
+    }
+    if (res == -ENOTSUP) {
+        // Ask underlying netdev
+        res = dev->driver->get(dev, opt, value, max_len);
+    }
+    return res;
+}
+
+int netif_set_opt(netif_t *iface, netopt_t opt, uint16_t context,
+                  void *value, size_t value_len)
+{
+    (void)iface;
+    (void)opt;
+    (void)context;
+    (void)value;
+    (void)value_len;
+
+    return -ENOTSUP;
+}
+
 /** @} */