/**
 ******************************************************************************
 * @file    LwIP/LwIP_HTTP_Server_Netconn_RTOS/Src/app_ethernet.c
 * @author  MCD Application Team
 * @brief   Ethernet specefic module
 ******************************************************************************
 * @attention
 *
 * <h2><center>&copy; Copyright (c) 2017 STMicroelectronics.
 * All rights reserved.</center></h2>
 *
 * This software component is licensed by ST under Ultimate Liberty license
 * SLA0044, the "License"; You may not use this file except in compliance with
 * the License. You may obtain a copy of the License at:
 *                             www.st.com/SLA0044
 *
 ******************************************************************************
 */
/* Includes ------------------------------------------------------------------*/
#include "lwip/opt.h"
#include "main.h"
#if LWIP_DHCP
#include "lwip/dhcp.h"
#endif
#include "app_ethernet.h"
#include "ethernetif.h"

/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
#if LWIP_DHCP
#define MAX_DHCP_TRIES  8
__IO uint8_t DHCP_state = DHCP_OFF;
#endif

/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
/**
 * @brief  Notify the User about the nework interface config status
 * @param  netif: the network interface
 * @retval None
 */
void ethernet_link_status_updated(struct netif *netif) {
    if (netif_is_up(netif)) {
#if LWIP_DHCP
        /* Update DHCP state machine */
        DHCP_state = DHCP_START;
#else
    BSP_LED_On(LED2);
    BSP_LED_Off(LED3);
#endif /* LWIP_DHCP */
    } else {
#if LWIP_DHCP
        /* Update DHCP state machine */
        DHCP_state = DHCP_LINK_DOWN;
#else    
    BSP_LED_Off(LED2);
    BSP_LED_On(LED3); 
#endif /* LWIP_DHCP */
    }
}

#if LWIP_DHCP
/**
 * @brief  DHCP Process
 * @param  argument: network interface
 * @retval None
 */
void DHCP_Thread(void const *argument) {
    struct netif *netif = (struct netif*) argument;
    ip_addr_t ipaddr;
    ip_addr_t netmask;
    ip_addr_t gw;
    struct dhcp *dhcp;

    /* Static address used */
//	IP_ADDR4(&ipaddr, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3);
//	IP_ADDR4(&netmask, NETMASK_ADDR0, NETMASK_ADDR1, NETMASK_ADDR2,
//			NETMASK_ADDR3);
//	IP_ADDR4(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);
//	netif_set_addr(netif, ip_2_ip4(&ipaddr), ip_2_ip4(&netmask), ip_2_ip4(&gw));
    for (;;) {
        switch (DHCP_state) {
        case DHCP_START : {
            ip_addr_set_zero_ip4(&netif->ip_addr);
            ip_addr_set_zero_ip4(&netif->netmask);
            ip_addr_set_zero_ip4(&netif->gw);
            DHCP_state = DHCP_WAIT_ADDRESS;

            BSP_LED_Off(LED2);
            BSP_LED_Off(LED3);

            dhcp_start(netif);
        }
            break;
        case DHCP_WAIT_ADDRESS : {
            if (dhcp_supplied_address(netif)) {
                DHCP_state = DHCP_ADDRESS_ASSIGNED;

                BSP_LED_On(LED2);
                BSP_LED_Off(LED3);
            } else {
                dhcp = (struct dhcp*) netif_get_client_data(netif,
                        LWIP_NETIF_CLIENT_DATA_INDEX_DHCP);

                /* DHCP timeout */
                if (dhcp->tries > MAX_DHCP_TRIES) {
                    DHCP_state = DHCP_TIMEOUT;

                    /* Static address used */
                    IP_ADDR4(&ipaddr, IP_ADDR0, IP_ADDR1, IP_ADDR2, IP_ADDR3);
                    IP_ADDR4(&netmask, NETMASK_ADDR0, NETMASK_ADDR1,
                            NETMASK_ADDR2, NETMASK_ADDR3);
                    IP_ADDR4(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);
                    netif_set_addr(netif, ip_2_ip4(&ipaddr), ip_2_ip4(&netmask),
                            ip_2_ip4(&gw));

                    BSP_LED_On(LED2);
                    BSP_LED_Off(LED3);
                }
            }
        }
            break;
        case DHCP_LINK_DOWN : {
            dhcp_release_and_stop(netif);

            BSP_LED_Off(LED2);
            BSP_LED_On(LED3);

            ip_addr_set_zero_ip4(&netif->ip_addr);
            ip_addr_set_zero_ip4(&netif->netmask);
            ip_addr_set_zero_ip4(&netif->gw);

            DHCP_state = DHCP_WAIT_LINK_UP;
        }
            break;
        case DHCP_WAIT_LINK_UP : {
            if (netif_is_link_up((netif))) {
                DHCP_state = DHCP_START;
            }
        }
            break;
        default:
            break;
        }

        /* wait 500 ms */
        osDelay(500);

    }
}
#endif  /* LWIP_DHCP */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/