udhcpc6: use correct multicast MAC

function                                             old     new   delta
static.MAC_DHCP6MCAST_ADDR                             -       6      +6

Signed-off-by: Uwe Glaeser <uwe.glaeser@dormakaba.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/networking/udhcp/d6_dhcpc.c b/networking/udhcp/d6_dhcpc.c
index 85c410a7c..fc2d672b7 100644
--- a/networking/udhcp/d6_dhcpc.c
+++ b/networking/udhcp/d6_dhcpc.c
@@ -553,11 +553,15 @@ static int d6_mcast_from_client_data_ifindex(struct d6_packet *packet, uint8_t *
                 0xFF, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
                 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02,
         };
+        /* IPv6 requires different multicast contents in Ethernet Frame (RFC 2464) */
+        static const uint8_t MAC_DHCP6MCAST_ADDR[6] ALIGN2 = {
+                0x33, 0x33, 0x00, 0x01, 0x00, 0x02,
+        };
 
         return d6_send_raw_packet(
                 packet, (end - (uint8_t*) packet),
                 /*src*/ &client6_data.ll_ip6, CLIENT_PORT6,
-                /*dst*/ (struct in6_addr*)FF02__1_2, SERVER_PORT6, MAC_BCAST_ADDR,
+                /*dst*/ (struct in6_addr*)FF02__1_2, SERVER_PORT6, MAC_DHCP6MCAST_ADDR,
                 client_data.ifindex
         );
 }