ipv6: Introduce ipv6_addr_is_solict_mult() to check Solicited Node Multicast Addresses.

Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 5 deletions

diff --git a/net/ipv6/ndisc.c b/net/ipv6/ndisc.c
index 350f86005c13..903191adb5ca 100644
--- a/net/ipv6/ndisc.c
+++ b/net/ipv6/ndisc.c
@@ -685,11 +685,7 @@ static void ndisc_recv_ns(struct sk_buff *skb)
          * RFC2461 7.1.1:
          * DAD has to be destined for solicited node multicast address.
          */
-        if (dad &&
-            !(daddr->s6_addr32[0] == htonl(0xff020000) &&
-              daddr->s6_addr32[1] == htonl(0x00000000) &&
-              daddr->s6_addr32[2] == htonl(0x00000001) &&
-              daddr->s6_addr [12] == 0xff )) {
+        if (dad && !ipv6_addr_is_solict_mult(daddr)) {
                 ND_PRINTK(2, warn, "NS: bad DAD packet (wrong destination)\n");
                 return;
         }