ipv4: Conditionally enable transparent flow flag when connecting

Set FLOWI_FLAG_ANYSRC in flowi->flags if the socket has the
transparent socket option set. This way we selectively enable certain
connections with non-local source addresses to be routed.

Signed-off-by: KOVACS Krisztian <hidden@sch.bme.hu>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 1 deletions

diff --git a/include/net/route.h b/include/net/route.h
index 31d1485b624d..4e8cae0e5841 100644
--- a/include/net/route.h
+++ b/include/net/route.h
@@ -27,7 +27,7 @@
 #include <net/dst.h>
 #include <net/inetpeer.h>
 #include <net/flow.h>
-#include <net/sock.h>
+#include <net/inet_sock.h>
 #include <linux/in_route.h>
 #include <linux/rtnetlink.h>
 #include <linux/route.h>
@@ -161,6 +161,10 @@ static inline int ip_route_connect(struct rtable **rp, __be32 dst,
 
         int err;
         struct net *net = sock_net(sk);
+
+        if (inet_sk(sk)->transparent)
+                fl.flags |= FLOWI_FLAG_ANYSRC;
+
         if (!dst || !src) {
                 err = __ip_route_output_key(net, rp, &fl);
                 if (err)