From d827dbf7770df52be51d0a6d7eb49ac2cab859e8 Mon Sep 17 00:00:00 2001
From: yuanjm <yuanjianmin@espressif.com>
Date: Fri, 10 Sep 2021 15:34:44 +0800
Subject: [PATCH] dhcp: Fix build issue that set
 ESP_DHCP_DISABLE_VENDOR_CLASS_IDENTIFIER to true will build fail

---
 src/core/ipv4/dhcp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/core/ipv4/dhcp.c b/src/core/ipv4/dhcp.c
index d307cd80..16d806fa 100644
--- a/src/core/ipv4/dhcp.c
+++ b/src/core/ipv4/dhcp.c
@@ -2019,9 +2019,11 @@ again:
         LWIP_ERROR("len == 4", len == 4, return ERR_VAL;);
         decode_idx = DHCP_OPTION_IDX_T2;
         break;
+#if ESP_DHCP && !ESP_DHCP_DISABLE_VENDOR_CLASS_IDENTIFIER
       case (DHCP_OPTION_VSI):
         decode_idx = DHCP_OPTION_IDX_VSI;
         break;
+#endif
       default:
         decode_len = 0;
         LWIP_DEBUGF(DHCP_DEBUG, ("skipping option %"U16_F" in options\n", (u16_t)op));