pkg/lwip: netif_set_opt for IPv4 address

pkg/lwip/contrib/_netif.c

@@ -20,6 +20,9 @@
 #include "lwip/netif/compat.h"
 #include "net/netif.h"
 
+#include <lwip/netif/compat.h>
+//#include <arpa/inet.h>
+
 int netif_get_name(netif_t *iface, char *name)
 {
     lwip_netif_t *lwip_netif = (lwip_netif_t*) iface;
@@ -80,7 +83,30 @@ int netif_set_opt(netif_t *iface, netopt_t opt, uint16_t context,
     (void)value;
     (void)value_len;
 
-    return -ENOTSUP;
+    int res = -ENOTSUP;
+
+    switch (opt) {
+#ifdef MODULE_LWIP_IPV4
+    case NETOPT_IPV4_ADDR: {
+        lwip_netif_t *lwip_netif = (lwip_netif_t*) iface;
+        struct netif *netif = &lwip_netif->lwip_netif;
+        ip4_addr_t ip, subnet, gw;
+
+        res = 0;
+        memcpy((void*)&(ip.addr), value, value_len);
+        //ToDO: get current value
+        subnet.addr = 0x00ffffff;
+        gw.addr = 0x00000000;
+
+        netif_set_addr(netif, &ip, &subnet, &gw);
+        }
+     break;
+#endif
+
+    default:
+        break;
+    }
+    return res;
 }
 
 /** @} */