[SCTP]: Reject sctp packets with broadcast addresses.

Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: Sridhar Samudrala <sri@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index 2088aa992b7a..816c033d7886 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -365,12 +365,18 @@ static int sctp_v4_is_any(const union sctp_addr *addr)
  * Return 0 - If the address is a non-unicast or an illegal address.
  * Return 1 - If the address is a unicast.
  */
-static int sctp_v4_addr_valid(union sctp_addr *addr, struct sctp_sock *sp)
+static int sctp_v4_addr_valid(union sctp_addr *addr,
+                              struct sctp_sock *sp,
+                              const struct sk_buff *skb)
 {
         /* Is this a non-unicast address or a unusable SCTP address? */
         if (IS_IPV4_UNUSABLE_ADDRESS(&addr->v4.sin_addr.s_addr))
                 return 0;
 
+        /* Is this a broadcast address? */
+        if (skb && ((struct rtable *)skb->dst)->rt_flags & RTCF_BROADCAST)
+                return 0;
+
         return 1;
 }