From: Wu Jian Gang <wujiangang@espressif.com>
Date: Fri, 26 Aug 2016 04:03:52 +0000 (+0800)
Subject: tcpip_adpater: set ip to zero in tcpip_adapter_down
X-Git-Tag: v0.9~70^2~4^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=588d384;p=esp-idf

tcpip_adpater: set ip to zero in tcpip_adapter_down

In some cases, there will have "ip unchanged", and have no event posted
when station reconnected.
---

diff --git a/components/tcpip_adapter/tcpip_adapter_lwip.c b/components/tcpip_adapter/tcpip_adapter_lwip.c
index d6ad20ad83..a2a37be472 100644
--- a/components/tcpip_adapter/tcpip_adapter_lwip.c
+++ b/components/tcpip_adapter/tcpip_adapter_lwip.c
@@ -139,7 +139,7 @@ esp_err_t tcpip_adapter_up(tcpip_adapter_if_t tcpip_if)
 esp_err_t tcpip_adapter_down(tcpip_adapter_if_t tcpip_if)
 {
     if (tcpip_if == TCPIP_ADAPTER_IF_STA) {
-        if (esp_netif[tcpip_if] == NULL){
+        if (esp_netif[tcpip_if] == NULL) {
             return ESP_ERR_TCPIP_ADAPTER_IF_NOT_READY;
         }
 
@@ -155,6 +155,10 @@ esp_err_t tcpip_adapter_down(tcpip_adapter_if_t tcpip_if)
             netif_set_down(esp_netif[tcpip_if]);
             netif_set_addr(esp_netif[tcpip_if], IP4_ADDR_ANY, IP4_ADDR_ANY, IP4_ADDR_ANY);
         }
+
+        ip4_addr_set_zero(&esp_ip[tcpip_if].ip);
+        ip4_addr_set_zero(&esp_ip[tcpip_if].gw);
+        ip4_addr_set_zero(&esp_ip[tcpip_if].netmask);
     }
 
     return ESP_OK;