From 3ebb1a2a0091b93a6a027ab3f3ab80810b0a91bf Mon Sep 17 00:00:00 2001
From: yuanjm <yuanjianmin@espressif.com>
Date: Mon, 25 Oct 2021 14:07:37 +0800
Subject: [PATCH] lwip: Update LWIP_DHCP_OPTIONS_LEN default value when
 LWIP_DHCP_DISABLE_VENDOR_CLASS_ID disabled

Closes https://github.com/espressif/esp-idf/issues/7742
---
 components/lwip/Kconfig | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/components/lwip/Kconfig b/components/lwip/Kconfig
index 560598d1bf..e229f2212a 100644
--- a/components/lwip/Kconfig
+++ b/components/lwip/Kconfig
@@ -275,7 +275,8 @@ menu "LWIP"
 
     config LWIP_DHCP_OPTIONS_LEN
         int "DHCP total option length"
-        default 68
+        default 68 if LWIP_DHCP_DISABLE_VENDOR_CLASS_ID
+        default 108 if !LWIP_DHCP_DISABLE_VENDOR_CLASS_ID
         range 68 255
         help
             Set total length of outgoing DHCP option msg. Generally bigger value means it can carry more