From 14bba8e365d1401d72e145ca2d34eae9e64b4152 Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Wed, 23 Mar 2022 13:09:03 +0100
Subject: [PATCH] dhcp: Add post_init hook to allow skip discovery

This enables embedded devices restart the DHCP state machine easily
after reset and continue directly with DHCP_BIND of previously bound
address.

Co-Authored-By: MartinValik <martin.valik@mail.com> (espressif/esp-lwip@3b88e84f)
Ref IDF-4817
---
 src/core/ipv4/dhcp.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/core/ipv4/dhcp.c b/src/core/ipv4/dhcp.c
index 76b9f682..503ceea9 100644
--- a/src/core/ipv4/dhcp.c
+++ b/src/core/ipv4/dhcp.c
@@ -795,6 +795,12 @@ dhcp_start(struct netif *netif)
     return ERR_OK;
   }
 
+#ifdef LWIP_HOOK_DHCP_POST_INIT
+  if (LWIP_HOOK_DHCP_POST_INIT(netif, result)) {
+    return result;
+  }
+#endif
+
   /* (re)start the DHCP negotiation */
   result = dhcp_discover(netif);
   if (result != ERR_OK) {