1 files changed, 14 insertions, 1 deletions

diff --git a/net/ipv4/ip_sockglue.c b/net/ipv4/ip_sockglue.c
index 105d92a039b9..465abf0a9869 100644
--- a/net/ipv4/ip_sockglue.c
+++ b/net/ipv4/ip_sockglue.c
@@ -419,7 +419,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
                              (1<<IP_TTL) | (1<<IP_HDRINCL) |
                              (1<<IP_MTU_DISCOVER) | (1<<IP_RECVERR) |
                              (1<<IP_ROUTER_ALERT) | (1<<IP_FREEBIND) |
-                             (1<<IP_PASSSEC))) ||
+                             (1<<IP_PASSSEC) | (1<<IP_TRANSPARENT))) ||
             optname == IP_MULTICAST_TTL ||
             optname == IP_MULTICAST_LOOP) {
                 if (optlen >= sizeof(int)) {
@@ -878,6 +878,16 @@ static int do_ip_setsockopt(struct sock *sk, int level,
                 err = xfrm_user_policy(sk, optname, optval, optlen);
                 break;
 
+        case IP_TRANSPARENT:
+                if (!capable(CAP_NET_ADMIN)) {
+                        err = -EPERM;
+                        break;
+                }
+                if (optlen < 1)
+                        goto e_inval;
+                inet->transparent = !!val;
+                break;
+
         default:
                 err = -ENOPROTOOPT;
                 break;
@@ -1130,6 +1140,9 @@ static int do_ip_getsockopt(struct sock *sk, int level, int optname,
         case IP_FREEBIND:
                 val = inet->freebind;
                 break;
+        case IP_TRANSPARENT:
+                val = inet->transparent;
+                break;
         default:
                 release_sock(sk);
                 return -ENOPROTOOPT;