From 2e173e77548d423ddbc0afb042c2b9c9c68a1ef4 Mon Sep 17 00:00:00 2001
From: David Cermak <cermak@espressif.com>
Date: Mon, 14 Apr 2025 18:49:43 +0200
Subject: [PATCH] fix(esp_netif): Fix incorrect DHCP call for PPP interfaces

Closes https://github.com/espressif/esp-protocols/issues/800
---
 components/esp_netif/lwip/esp_netif_lwip.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/components/esp_netif/lwip/esp_netif_lwip.c b/components/esp_netif/lwip/esp_netif_lwip.c
index e7c538bdee..8769284b10 100644
--- a/components/esp_netif/lwip/esp_netif_lwip.c
+++ b/components/esp_netif/lwip/esp_netif_lwip.c
@@ -1387,7 +1387,14 @@ static void esp_netif_internal_dhcpc_cb(struct netif *netif)
                 ESP_LOGE(TAG, "dhcpc cb: failed to post got ip event (%x)", ret);
             }
 #ifdef CONFIG_LWIP_DHCP_RESTORE_LAST_IP
-            dhcp_ip_addr_store(netif);
+            /*
+             * Store the IP address only for non-Point-to-Point interfaces.
+             * P2P interfaces (like PPP) have dynamic addressing that shouldn't be stored
+             * for later restoration, as they're negotiated on each connection.
+             */
+            if (!_IS_NETIF_ANY_POINT2POINT_TYPE(esp_netif)) {
+                dhcp_ip_addr_store(netif);
+            }
 #endif /* CONFIG_LWIP_DHCP_RESTORE_LAST_IP */
         } else {
             ESP_LOGD(TAG, "if%p ip unchanged", esp_netif);