[PATCH ovpn net-next 3/5] ovpn: use bound address in UDP when available

From: Ralf Lici <[email protected]>

Use the socket's locally bound address if it's explicitly specified via
the --local option in openvpn.

Signed-off-by: Ralf Lici <[email protected]>
Signed-off-by: Antonio Quartulli <[email protected]>
---
 drivers/net/ovpn/udp.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ovpn/udp.c b/drivers/net/ovpn/udp.c
index 78b9aea06de9..b5d1ca014732 100644
--- a/drivers/net/ovpn/udp.c
+++ b/drivers/net/ovpn/udp.c
@@ -147,7 +147,7 @@ static int ovpn_udp4_output(struct ovpn_peer *peer, struct ovpn_bind *bind,
 {
 	struct rtable *rt;
 	struct flowi4 fl = {
-		.saddr = bind->local.ipv4.s_addr,
+		.saddr = inet_sk(sk)->inet_rcv_saddr ?: bind->local.ipv4.s_addr,
 		.daddr = bind->remote.in4.sin_addr.s_addr,
 		.fl4_sport = inet_sk(sk)->inet_sport,
 		.fl4_dport = bind->remote.in4.sin_port,
@@ -225,7 +225,9 @@ static int ovpn_udp6_output(struct ovpn_peer *peer, struct ovpn_bind *bind,
 	int ret;
 
 	struct flowi6 fl = {
-		.saddr = bind->local.ipv6,
+		.saddr = ipv6_addr_any(&sk->sk_v6_rcv_saddr) ?
+				 bind->local.ipv6 :
+				 sk->sk_v6_rcv_saddr,
 		.daddr = bind->remote.in6.sin6_addr,
 		.fl6_sport = inet_sk(sk)->inet_sport,
 		.fl6_dport = bind->remote.in6.sin6_port,
-- 
2.53.0