1 files changed, 20 insertions, 1 deletions

diff --git a/net/sctp/bind_addr.c b/net/sctp/bind_addr.c
index 6d5944a745d4..13a6fba41077 100644
--- a/net/sctp/bind_addr.c
+++ b/net/sctp/bind_addr.c
@@ -510,9 +510,28 @@ int sctp_in_scope(const union sctp_addr *addr, sctp_scope_t scope)
          * of requested destination address, sender and receiver
          * SHOULD include all of its addresses with level greater
          * than or equal to L.
+         *
+         * Address scoping can be selectively controlled via sysctl
+         * option
          */
-        if (addr_scope <= scope)
+        switch (sctp_scope_policy) {
+        case SCTP_SCOPE_POLICY_DISABLE:
                 return 1;
+        case SCTP_SCOPE_POLICY_ENABLE:
+                if (addr_scope <= scope)
+                        return 1;
+                break;
+        case SCTP_SCOPE_POLICY_PRIVATE:
+                if (addr_scope <= scope || SCTP_SCOPE_PRIVATE == addr_scope)
+                        return 1;
+                break;
+        case SCTP_SCOPE_POLICY_LINK:
+                if (addr_scope <= scope || SCTP_SCOPE_LINK == addr_scope)
+                        return 1;
+                break;
+        default:
+                break;
+        }
 
         return 0;
 }