- setsockopt(c->socket, SOL_TCP, TCP_NODELAY, (void *)&option, sizeof option);
+ setsockopt(c->socket, IPPROTO_TCP, TCP_NODELAY, (void *)&option, sizeof option);
+#endif
+
+#if defined(IPPROTO_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY)
+ option = IPTOS_LOWDELAY;
+ setsockopt(c->socket, IPPROTO_IP, IP_TOS, (void *)&option, sizeof option);