tcpip_adapter/lwip: make dhcp domain name server option configurable

[esp-idf] / components / lwip / include / lwip / port / lwipopts.h

diff --git a/components/lwip/include/lwip/port/lwipopts.h b/components/lwip/include/lwip/port/lwipopts.h
index 4b87af9578366ef7cc9618e4c0f46517cb35589d..88f4b1184d8492866cf3bca9cc42dcd310204d55 100644 (file)
--- a/components/lwip/include/lwip/port/lwipopts.h
+++ b/components/lwip/include/lwip/port/lwipopts.h
@@ -272,6 +272,9 @@
  */
 #define LWIP_DNS                        1
 
+#define DNS_MAX_SERVERS                 3
+#define DNS_FALLBACK_SERVER_INDEX        (DNS_MAX_SERVERS - 1)
+
 /*
    ---------------------------------
    ---------- UDP options ----------