[patch libteam] teamd: lw: nsna_ping: only send ns on enabled port

[Hangbin Liu]

We forget to check forced_send when using nsna_ping link_watch.
Ns is sent from all ports, which cause switch mac flapping. Some
reply packets are delivered to disabled port and dropped directly.

Fix it by checking forced_send and only send ns on enabled port.

Reported-by: LiLiang <liali(a)redhat.com&gt;
Signed-off-by: Hangbin Liu <liuhangbin(a)gmail.com&gt;
---
 teamd/teamd_lw_nsna_ping.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/teamd/teamd_lw_nsna_ping.c b/teamd/teamd_lw_nsna_ping.c
index 127d950..82371c4 100644
--- a/teamd/teamd_lw_nsna_ping.c
+++ b/teamd/teamd_lw_nsna_ping.c
@@ -203,6 +203,9 @@ static int lw_nsnap_send(struct lw_psr_port_priv *psr_ppriv)
 	struct sockaddr_in6 sendto_addr;
 	struct ns_packet nsp;
 
+	if (!(psr_ppriv->common.forced_send))
+		return 0;
+
 	err = teamd_getsockname_hwaddr(psr_ppriv->sock, &ll_my,
 				       sizeof(nsp.hwaddr));
 	if (err)
-- 
2.19.2