- When the number of retries per remote exceeds a limit
(hard coded to 5), double the restart pause interval
for each additional retry per remote.
- Trigger a SIGHUP to reset the retry count when the pause
interval exceeds 1024 times the base value of restart pause.
The base value of restart pause is set using --connect-retry
(5 seconds by default). If it is set to zero no slow-down
will happen.
Signed-off-by: Selva Nair <selva.n...@gmail.com>
---
src/openvpn/init.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/src/openvpn/init.c b/src/openvpn/init.c
index 498d36f..45e8878 100644
--- a/src/openvpn/init.c
+++ b/src/openvpn/init.c
@@ -1955,6 +1955,7 @@ static void
socket_restart_pause (struct context *c)
{
int sec = 2;
+ int backoff = 0;
switch (c->options.ce.proto)
{
@@ -1977,6 +1978,17 @@ socket_restart_pause (struct context *c)
sec = 10;
#endif
+ /* Slow down reconnection after 5 retries per remote */
+ backoff = (c->options.unsuccessful_attempts /
c->options.connection_list->len) - 5;
+ if (backoff > 0)
+ sec <<= min_int (backoff, 10);
+
+ if (backoff > 10 && sec > 0)
+ {
+ register_signal (c, SIGHUP, "Too many restarts");
+ return;
+ }
+
if (c->persist.restart_sleep_seconds > 0 && c->persist.restart_sleep_seconds
> sec)
sec = c->persist.restart_sleep_seconds;
else if (c->persist.restart_sleep_seconds == -1)
--
1.7.10.4
