gnrc: netdev2: eth: check for empty multicast

8 years ago · 04022be770
parent 93a92dfa03
commit 04022be770
1 changed files with 5 additions and 0 deletions
--- a/sys/net/gnrc/link_layer/netdev2/gnrc_netdev2_eth.c
+++ b/sys/net/gnrc/link_layer/netdev2/gnrc_netdev2_eth.c
@ -170,6 +170,11 @@ static int _send(gnrc_netdev2_t *gnrc_netdev2, gnrc_pktsnip_t *pkt)
        _addr_set_broadcast(hdr.dst);
    }
    else if (netif_hdr->flags & GNRC_NETIF_HDR_FLAGS_MULTICAST) {
+        if (payload == NULL) {
+            DEBUG("gnrc_netdev2_eth: empty multicast packets over Ethernet "\
+                  "are not yet supported\n");
+            return -ENOTSUP;
+        }
        _addr_set_multicast(hdr.dst, payload);
    }
    else if (netif_hdr->dst_l2addr_len == ETHERNET_ADDR_LEN) {