Allow PMTUDiscovery in switch and hub modes again.

PMTUDiscovery was disabled in commit d5b56bbba56480b5565ffb38496175a7c1df60ac
because tinc did not handle packets larger than the path MTU in switch and hub
modes. We now allow it again in preparation of proper support, but default to
off.

diff --git a/src/net_setup.c b/src/net_setup.c
index 4eef68e..d45cb1b 100644 (file)
--- a/src/net_setup.c
+++ b/src/net_setup.c
@@ -306,9 +306,12 @@ bool setup_myself(void)
        } else
                routing_mode = RMODE_ROUTER;
 
-       if(routing_mode == RMODE_ROUTER)
-               if(!get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) || choice)
-                       myself->options |= OPTION_PMTU_DISCOVERY;
+       // Enable PMTUDiscovery by default if we are in router mode.
+
+       choice = routing_mode == RMODE_ROUTER;
+       get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice);
+       if(choice)      
+               myself->options |= OPTION_PMTU_DISCOVERY;
 
        get_config_bool(lookup_config(config_tree, "PriorityInheritance"), &priorityinheritance);