/**
  ******************************************************************************
  * @file    netconf.c
  * @author  MCD Application Team
  * @version V1.0.0
  * @date    31-October-2011
  * @brief   Network connection configuration
  ******************************************************************************
  * @attention
  *
  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  *
  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include <stdint.h>
#include "lwip/mem.h"
#include "lwip/memp.h"
#include "lwip/dhcp.h"
#include "ethernetif.h"
#include "web_server.h"
#include "netconf.h"
#include "tcpip.h"
#include "lcd_task.h"
#include <stdio.h>

/* Private typedef -----------------------------------------------------------*/
typedef enum
{
  DHCP_START=0,
  DHCP_WAIT_ADDRESS,
  DHCP_ADDRESS_ASSIGNED,
  DHCP_TIMEOUT
}
DHCP_State_TypeDef;
/* Private define ------------------------------------------------------------*/
#define MAX_DHCP_TRIES 5

/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
struct netif xnetif; /* network interface structure */

/* Private functions ---------------------------------------------------------*/
/**
  * @brief  Initializes the lwIP stack
  * @param  None
  * @retval None
  */
void LwIP_Init(void)
{
  ip_addr_t ipaddr;
  ip_addr_t netmask;
  ip_addr_t gw;

  /* Create tcp_ip stack thread */
  tcpip_init( NULL, NULL );

  /* IP address setting & display on STM32_evalboard LCD*/
#ifdef USE_DHCP
  ipaddr.addr = 0;
  netmask.addr = 0;
  gw.addr = 0;
#else
  IP4_ADDR(&ipaddr, atsc_para.config_para.ip[0], atsc_para.config_para.ip[1], atsc_para.config_para.ip[2], atsc_para.config_para.ip[3]);
  IP4_ADDR(&netmask, atsc_para.config_para.mask[0], atsc_para.config_para.mask[1] , atsc_para.config_para.mask[2], atsc_para.config_para.mask[3]);
  IP4_ADDR(&gw, atsc_para.config_para.gateway[0], atsc_para.config_para.gateway[1], atsc_para.config_para.gateway[2], atsc_para.config_para.gateway[3]);
#endif

  /* - netif_add(struct netif *netif, struct ip_addr *ipaddr,
            struct ip_addr *netmask, struct ip_addr *gw,
            void *state, err_t (* init)(struct netif *netif),
            err_t (* input)(struct pbuf *p, struct netif *netif))

   Adds your network interface to the netif_list. Allocate a struct
  netif and pass a pointer to this structure as the first argument.
  Give pointers to cleared ip_addr structures when using DHCP,
  or fill them with sane numbers otherwise. The state pointer may be NULL.

  The init function pointer must point to a initialization function for
  your ethernet netif interface. The following code illustrates it's use.*/

  netif_add(&xnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &tcpip_input);

 /*  Registers the default network interface. */
  netif_set_default(&xnetif);

 /*  When the netif is fully configured this function must be called.*/
  netif_set_up(&xnetif);
}

static ip_addr_t g_ip,g_mask,g_gate;
static void lwIPPrivateNetworkConfigChange(void *parg)
{
    netif_set_addr(&xnetif,&g_ip,&g_mask,&g_gate);
}

void lwIPNetworkConfigChange(uint32 ip,uint32 mask,uint32 gate)
{
    g_ip.addr   = htonl(ip);
    g_mask.addr = htonl(mask);
    g_gate.addr = htonl(gate);

    tcpip_callback(lwIPPrivateNetworkConfigChange,NULL);
}

#ifdef USE_DHCP
/**
  * @brief  LwIP_DHCP_Process_Handle
  * @param  None
  * @retval None
  */
void LwIP_DHCP_task(void * pvParameters)
{
  struct ip_addr ipaddr;
  struct ip_addr netmask;
  struct ip_addr gw;
  uint32_t IPaddress;
  //uint8_t iptab[4];
  //uint8_t iptxt[20];
  uint8_t DHCP_state;
  DHCP_state = DHCP_START;

  for (;;)
  {
    switch (DHCP_state)
    {
      case DHCP_START:
      {
        dhcp_start(&xnetif);
        IPaddress = 0;
        DHCP_state = DHCP_WAIT_ADDRESS;
      }
      break;

      case DHCP_WAIT_ADDRESS:
      {
        /* Read the new IP address */
        IPaddress = xnetif.ip_addr.addr;

        if (IPaddress!=0)
        {
          DHCP_state = DHCP_ADDRESS_ASSIGNED;

          /* Stop DHCP */
          dhcp_stop(&xnetif);

          /* end of DHCP process: LED1 stays ON*/
          //STM_EVAL_LEDOn(LED1);
          vTaskDelete(NULL);
        }
        else
        {
          /* DHCP timeout */
          if (xnetif.dhcp->tries > MAX_DHCP_TRIES)
          {
            DHCP_state = DHCP_TIMEOUT;

            /* Stop DHCP */
            dhcp_stop(&xnetif);

            /* Static address used */
            IP4_ADDR(&ipaddr, IP_ADDR0 ,IP_ADDR1 , IP_ADDR2 , IP_ADDR3 );
            IP4_ADDR(&netmask, NETMASK_ADDR0, NETMASK_ADDR1, NETMASK_ADDR2, NETMASK_ADDR3);
            IP4_ADDR(&gw, GW_ADDR0, GW_ADDR1, GW_ADDR2, GW_ADDR3);
            netif_set_addr(&xnetif, &ipaddr , &netmask, &gw);

            /* end of DHCP process: LED1 stays ON*/
            //STM_EVAL_LEDOn(LED1);
            vTaskDelete(NULL);
          }
        }
      }
      break;

      default: break;
    }

    /* Toggle LED1 */
    //STM_EVAL_LEDToggle(LED1);
    /* wait 250 ms */
    vTaskDelay(250/portTICK_RATE_MS);
  }
}
#endif  /* USE_DHCP */

/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/