sctp: Support ipv6only AF_INET6 sockets.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/net/sctp/protocol.c b/net/sctp/protocol.c
index dd811a8456a8..cdd881142f2c 100644
--- a/net/sctp/protocol.c
+++ b/net/sctp/protocol.c
@@ -381,6 +381,10 @@ static int sctp_v4_addr_valid(union sctp_addr *addr,
                               struct sctp_sock *sp,
                               const struct sk_buff *skb)
 {
+        /* IPv4 addresses not allowed */
+        if (sp && ipv6_only_sock(sctp_opt2sk(sp)))
+                return 0;
+
         /* Is this a non-unicast address or a unusable SCTP address? */
         if (IS_IPV4_UNUSABLE_ADDRESS(addr->v4.sin_addr.s_addr))
                 return 0;
@@ -404,6 +408,9 @@ static int sctp_v4_available(union sctp_addr *addr, struct sctp_sock *sp)
            !sysctl_ip_nonlocal_bind)
                 return 0;
 
+        if (ipv6_only_sock(sctp_opt2sk(sp)))
+                return 0;
+
         return 1;
 }