pkg/lwip: implement netif_get_name()

pkg/lwip/contrib/_netif.c

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2021 ML!PA Consulting GmbH
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @{
+ *
+ * Implements @ref net_netif for @ref net_lwip
+ *
+ * @file
+ * @author  Benjamin Valentin <[email protected]>
+ */
+
+#include <string.h>
+
+#include "fmt.h"
+#include "lwip/netif.h"
+#include "net/netif.h"
+
+int netif_get_name(netif_t *iface, char *name)
+{
+    struct netif *netif = (struct netif *)iface;
+
+    int res = 0;
+    name[res] = netif->name[res]; ++res;
+    name[res] = netif->name[res]; ++res;
+    res += fmt_u16_dec(&name[res], netif->num);
+    name[res] = '\0';
+    return res;
+}
+
+/** @} */