net/gnrc/802154: enable filtering of L2 addresses

drivers/netdev_ieee802154/netdev_ieee802154.c

@@ -125,6 +125,13 @@ int netdev_ieee802154_get(netdev_ieee802154_t *dev, netopt_t opt, void *value,
             *((netstats_t **)value) = &dev->netdev.stats;
             res = sizeof(uintptr_t);
             break;
+#endif
+#ifdef MODULE_L2FILTER
+        case NETOPT_L2FILTER:
+            assert(max_len >= sizeof(l2filter_t **));
+            *((l2filter_t **)value) = dev->netdev.filter;
+            res = sizeof(l2filter_t **);
+            break;
 #endif
         default:
             break;
@@ -207,6 +214,14 @@ int netdev_ieee802154_set(netdev_ieee802154_t *dev, netopt_t opt, void *value,
             dev->proto = *((gnrc_nettype_t *)value);
             res = sizeof(gnrc_nettype_t);
             break;
+#endif
+#ifdef MODULE_L2FILTER
+        case NETOPT_L2FILTER:
+            res = l2filter_add(dev->netdev.filter, value, len);
+            break;
+        case NETOPT_L2FILTER_RM:
+            res = l2filter_rm(dev->netdev.filter, value, len);
+            break;
 #endif
         default:
             break;

sys/net/gnrc/link_layer/netdev/gnrc_netdev_ieee802154.c

@@ -16,6 +16,7 @@
 #include <stddef.h>
 
 #include "od.h"
+#include "net/l2filter.h"
 #include "net/gnrc.h"
 #include "net/ieee802154.h"
 
@@ -112,7 +113,19 @@ static gnrc_pktsnip_t *_recv(gnrc_netdev_t *gnrc_netdev)
                 gnrc_pktbuf_release(pkt);
                 return NULL;
             }
+
             hdr = netif_hdr->data;
+
+#ifdef MODULE_L2FILTER
+            if (!l2filter_pass(netdev->filter, gnrc_netif_hdr_get_src_addr(hdr),
+                               hdr->src_l2addr_len)) {
+                gnrc_pktbuf_release(pkt);
+                gnrc_pktbuf_release(netif_hdr);
+                DEBUG("_recv_ieee802154: packet dropped by l2filter\n");
+                return NULL;
+            }
+#endif
+
             hdr->lqi = rx_info.lqi;
             hdr->rssi = rx_info.rssi;
             hdr->if_pid = thread_getpid();