From: Selva Nair Date: Wed, 2 Jun 2021 19:47:39 +0000 (-0400) Subject: Apply the connect-retry backoff to only one side of a connection X-Git-Tag: v2.5.3~3 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d8dee82f1129ac6d3e4bcdc867726f5d64798dc7;p=thirdparty%2Fopenvpn.git Apply the connect-retry backoff to only one side of a connection p2p connections with both ends backing off seldom succeed as their connection attempt durations becomes increasingly unlikely to overlap when the retry wait time is long. Avoid this by applying the backoff logic only on TCP clients or the tls_client side for UDP. Regression warning: shared secret setups are left out of the backoff logic. Trac: #1010, #1384 Signed-off-by: Selva Nair Acked-by: Gert Doering Message-Id: <20210602194739.29488-1-selva.nair@gmail.com> URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg22485.html Signed-off-by: Gert Doering (cherry picked from commit 063d55afeea723fc6df0af29a19df257a8ab6920) --- diff --git a/src/openvpn/init.c b/src/openvpn/init.c index ffed7fdb3..5c3a63f3f 100644 --- a/src/openvpn/init.c +++ b/src/openvpn/init.c @@ -2455,8 +2455,9 @@ socket_restart_pause(struct context *c) } #endif - /* Slow down reconnection after 5 retries per remote -- for tcp only in client mode */ - if (c->options.ce.proto != PROTO_TCP_SERVER) + /* Slow down reconnection after 5 retries per remote -- for TCP client or UDP tls-client only */ + if (c->options.ce.proto == PROTO_TCP_CLIENT + || (c->options.ce.proto == PROTO_UDP && c->options.tls_client)) { backoff = (c->options.unsuccessful_attempts / c->options.connection_list->len) - 4; if (backoff > 0)