Tentative change: #if 0-out the functions that set the IP and DNS add…

…resses within EP-IDF. ESP-IDF determines these for itself during PPP negotiation.

port/platform/esp-idf/src/u_port_ppp.c

@@ -193,6 +193,7 @@ static int32_t convertIpAddress(uSockIpAddress_t *pIn, esp_ip_addr_t *pOut)
     return espError;
 }
 
+#if 0
 // Switch off DHCP and tell the IP stack what our IP address is.
 static esp_err_t setIpAddress(esp_netif_t *pEspNetif, uSockIpAddress_t *pIpAddress)
 {
@@ -249,6 +250,7 @@ static esp_err_t setDnsAddress(esp_netif_t *pEspNetif, esp_netif_dns_type_t type
 
     return espError;
 }
+#endif
 
 // This function is provided as a callback to the NETIF layer of
 // ESP-IDF in the structure esp_netif_driver_ifconfig_t, see
@@ -323,6 +325,7 @@ static esp_err_t postAttachStart(esp_netif_t *pEspNetif, void *pArgs)
         }
     }
 
+#if 0
     if ((espError == ESP_OK) && (pDriver->pIpAddress != NULL)) {
         espError = setIpAddress(pEspNetif, pDriver->pIpAddress);
         pDriver->pIpAddress = NULL; // NULL'ed so that we don't think it can be used again
@@ -340,6 +343,7 @@ static esp_err_t postAttachStart(esp_netif_t *pEspNetif, void *pArgs)
         }
     }
     // Note: secondary DNS address not supported by ESP-IDF for PPP
+#endif
 
 #if defined(CONFIG_LWIP_PPP_PAP_SUPPORT) || defined(CONFIG_LWIP_PPP_CHAP_SUPPORT)
     if (espError == ESP_OK) {
@@ -688,7 +692,12 @@ int32_t uPortPppReconnect(void *pDevHandle,
         if (pPppInterface != NULL) {
             errorCode = (int32_t) U_ERROR_COMMON_PLATFORM;
             pEspNetif = pPppInterface->netifDriver.base.netif;
+#if 0
+            (void) pIpAddress;
+            if (pEspNetif != NULL) {
+#else
             if ((pEspNetif != NULL) && (setIpAddress(pEspNetif, pIpAddress) == ESP_OK)) {
+#endif
                 errorCode = (int32_t) U_ERROR_COMMON_SUCCESS;
                 // Perform a disconnect and then connect again
                 if (pPppInterface->pDisconnectCallback != NULL) {