- if(get_config_bool(lookup_config(myself->connection->config_tree, "PMTUDiscovery"), &choice) && choice) {
- option = IP_PMTUDISC_DO;
- setsockopt(nfd, SOL_IP, IP_MTU_DISCOVER, &option, sizeof(option));
- }
+#if defined(SOL_IP) && defined(IP_MTU_DISCOVER) && defined(IP_PMTUDISC_DO)
+ if(myself->options & OPTION_PMTU_DISCOVERY) {
+ option = IP_PMTUDISC_DO;
+ setsockopt(nfd, SOL_IP, IP_MTU_DISCOVER, &option, sizeof(option));