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/**
******************************************************************************
* @file LwIP/LwIP_HTTP_Server_Netconn_RTOS/Src/app_ethernet.c
* @author MCD Application Team
* @brief Ethernet specific module
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "lwip/opt.h"
#include "lwip/dhcp.h"
#include "lwip/netif.h"
#include "lwip/tcpip.h"
#include "lwip/sockets.h"
#include "vnc_app.h"
#include "ethernetif.h"
#include "GUI_VNC.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
#define MAX_DHCP_TRIES 4
__IO uint8_t VNC_State = VNC_IDLE;
__IO uint8_t VNC_LockState = 0;
struct netif gnetif; /* network interface structure */
/* Semaphore to signal Ethernet Link state update */
osSemaphoreId Netif_LinkSemaphore = NULL;
/* Ethernet link thread Argument */
struct link_str link_arg;
int _Sock;
static uint8_t iptxt[128];
static struct sockaddr_in _Addr;
static GUI_VNC_CONTEXT _Context;
static int is_initialized = 0;
static int Connection_accepted = 0;
osThreadId VNC_ThreadId = 0;
/* Private function prototypes -----------------------------------------------*/
void VNC_Thread(void const * argument);
extern void VNC_SERVER_LogMessage (const char *message);
extern void VNC_SERVER_StatusChanged (uint8_t status);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Called by the server to send data
* @param buf: buffer to be sent.
* @param len: length of buf.
* @param pConnectionInfo: Connection info
* @retval transmit status.
*/
static int _Send(const U8 * buf, int len, void * pConnectionInfo) {
return ( send((long)pConnectionInfo, (const char *)buf, len, 0));
}
/**
* @brief Called by the server when data is received
* @param buf: buffer to get the received data.
* @param len: length of received data.
* @param pConnectionInfo: Connection info
* @retval receive status.
*/
static int _Recv(U8 * buf, int len, void * pConnectionInfo) {
return recv((long)pConnectionInfo, (char *)buf, len, 0);
}
/**
* @brief Starts listening at a TCP port.
* @param Port: TCP port to listen at
* @retval listen status.
*/
static int _ListenAtTcpAddr(U16 Port) {
struct sockaddr_in addr;
int sock;
sock = socket(AF_INET, SOCK_STREAM, 0);
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
addr.sin_port = htons(Port);
addr.sin_addr.s_addr = INADDR_ANY;
bind(sock, (struct sockaddr *)&addr, sizeof(addr));
listen(sock, 1);
return sock;
}
/**
* @brief VNC server thread process
* @param argument: not used
* @retval none
*/
static void VNC_Process( void)
{
static int s;
static uint8_t Is_SocketAssigned = 0;
u32_t AddrLen;
U16 Port;
if(Is_SocketAssigned == 0)
{
Is_SocketAssigned = 1;
/* Prepare socket (one time setup)
Default port for VNC is is 590x, where x is the 0-based layer index */
Port = 5900 + _Context.ServerIndex;
/* Loop until we get a socket into listening state */
do {
s = _ListenAtTcpAddr(Port);
if (s != -1) {
break;
}
vTaskDelay(100); /* Try again */
} while (1);
}
VNC_SERVER_StatusChanged(VNC_CONN_ESTABLISHED);
/* Loop once per client and create a thread for the actual server */
while (VNC_State == VNC_PROCESS)
{
/* Wait for an incoming connection */
AddrLen = sizeof(_Addr);
Connection_accepted = 1;
if ((_Sock = accept(s, (struct sockaddr*)&_Addr, &AddrLen)) < 1) {
closesocket(_Sock);
vTaskDelay(100);
continue; /* Error */
}
Connection_accepted = 0;
VNC_SERVER_LogMessage ("Connected to VNC Client");
GUI_VNC_Process(&_Context, _Send, _Recv, (void *)_Sock);
VNC_SERVER_LogMessage ((char *)iptxt);
/* Close the connection */
closesocket(_Sock);
}
}
/**
* @brief Initializes the lwIP stack
* @param None
* @retval None
*/
static void Netif_Config(void)
{
struct ip4_addr ipaddr;
struct ip4_addr netmask;
struct ip4_addr gw;
/* IP address setting */
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_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(&gnetif, &ipaddr, &netmask, &gw, NULL, ðernetif_init, &tcpip_input);
/* Registers the default network interface. */
netif_set_default(&gnetif);
if (netif_is_link_up(&gnetif))
{
/* When the netif is fully configured this function must be called.*/
netif_set_up(&gnetif);
}
else
{
/* When the netif link is down this function must be called */
netif_set_down(&gnetif);
}
}
/**
* @brief EXTI line detection callbacks
* @param GPIO_Pin: Specifies the pins connected EXTI line
* @retval None
*/
void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
{
if (GPIO_Pin == MFX_IRQOUT_PIN)
{
/* Get the IT status register value */
if(BSP_IO_ITGetStatus(MII_INT_PIN))
{
/* ethernetif_notify_conn_changed(&gnetif);; */
}
BSP_IO_ITClear();
}
}
/**
* @brief Initializes audio
* @param None.
* @retval Audio state.
*/
void VNC_SERVER_Start (void)
{
if(is_initialized == 0)
{
is_initialized = 1;
/* Create tcp_ip stack thread */
tcpip_init(NULL, NULL);
/* Initialize the LwIP stack */
Netif_Config();
/* Check connection */
if (netif_is_up(&gnetif))
{
/* Update VNC state machine */
VNC_State = VNC_LINK_UP;
VNC_SERVER_StatusChanged(VNC_LINK_UP);
}
else
{
/* Update VNC state machine */
VNC_State = VNC_LINK_DOWN;
VNC_SERVER_LogMessage ("Cable is not connected \n");
VNC_SERVER_StatusChanged(VNC_LINK_DOWN);
}
}
else if(VNC_State == VNC_INIT)
{
/* Check connection */
if (netif_is_up(&gnetif))
{
/* Update VNC state machine */
VNC_State = VNC_LINK_UP;
VNC_SERVER_StatusChanged(VNC_LINK_UP);
}
else
{
/* Update VNC state machine */
VNC_State = VNC_LINK_DOWN;
VNC_SERVER_LogMessage ("Cable is not connected \n");
VNC_SERVER_StatusChanged(VNC_LINK_DOWN);
}
}
/* Start VNC Task */
if(VNC_ThreadId == 0)
{
osThreadDef(VNC, VNC_Thread, osPriorityAboveNormal, 0, 1024);
VNC_ThreadId = osThreadCreate (osThread(VNC), NULL);
}
}
/**
* @brief Initializes audio
* @param None.
* @retval Audio state.
*/
void VNC_SERVER_Stop (void)
{
VNC_State = VNC_IDLE;
if(!Connection_accepted)
closesocket(_Sock);
VNC_SERVER_StatusChanged(VNC_IDLE);
VNC_SERVER_LogMessage ("VNC Connection OFF");
if(VNC_ThreadId != 0)
{
osThreadTerminate(VNC_ThreadId);
VNC_ThreadId = 0;
}
}
/**
* @brief This function notify user about link status changement.
* @param netif: the network interface
* @retval None
*/
void ethernetif_notify_conn_changed(struct netif *netif)
{
struct ip4_addr ipaddr;
struct ip4_addr netmask;
struct ip4_addr gw;
if(netif_is_link_up(netif))
{
VNC_SERVER_LogMessage ("Cable is now connected.");
/* Update DHCP state machine */
VNC_State = VNC_LINK_UP;
VNC_SERVER_StatusChanged(VNC_LINK_UP);
netif_set_addr(netif, &ipaddr , &netmask, &gw);
/* When the netif is fully configured this function must be called.*/
netif_set_up(netif);
}
else
{
/* Update DHCP state machine */
VNC_State = VNC_LINK_DOWN;
/* When the netif link is down this function must be called.*/
netif_set_down(netif);
VNC_SERVER_LogMessage ("Cable is not connected.");
closesocket(_Sock);
}
}
/**
* @brief Get VNC state
* @param None.
* @retval VNC state.
*/
uint8_t VNC_GetState(void)
{
return VNC_State;
}
/**
* @brief Get VNC state
* @param None.
* @retval VNC state.
*/
void VNC_SetState(uint8_t state)
{
VNC_State = state;
}
/**
* @brief Get VNC state
* @param None.
* @retval VNC state.
*/
uint8_t VNC_GetLockState(void)
{
return VNC_LockState;
}
/**
* @brief Get VNC state
* @param None.
* @retval VNC state.
*/
void VNC_SetLockState(uint8_t LockState)
{
VNC_LockState = LockState;
}
/**
* @brief VNC Thread
* @param argument: network interface
* @retval None
*/
void VNC_Thread(void const * argument)
{
struct dhcp *dhcp;
for (;;)
{
switch (VNC_State)
{
case VNC_LINK_UP:
{
gnetif.ip_addr.addr = 0;
gnetif.netmask.addr = 0;
gnetif.gw.addr = 0;
dhcp_start(&gnetif);
VNC_State = VNC_WAIT_FOR_ADDRESS;
VNC_SERVER_LogMessage ("Waiting for DHCP server...\n");
VNC_SERVER_StatusChanged(VNC_WAIT_FOR_ADDRESS);
}
break;
case VNC_WAIT_FOR_ADDRESS:
{
if (dhcp_supplied_address(&gnetif))
{
VNC_State = VNC_START;
VNC_SERVER_StatusChanged(VNC_START);
}
else
{
dhcp = (struct dhcp *)netif_get_client_data(&gnetif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP);
/* DHCP timeout */
if (dhcp->tries > MAX_DHCP_TRIES)
{
VNC_State = VNC_ERROR;
dhcp_stop(&gnetif);
VNC_SERVER_LogMessage ("No reply from DHCP Server!\n");
}
}
}
break;
case VNC_START:
sprintf((char*)iptxt,
"IP address : %d.%d.%d.%d\n",
(uint8_t)(gnetif.ip_addr.addr),
(uint8_t)((gnetif.ip_addr.addr) >> 8),
(uint8_t)((gnetif.ip_addr.addr) >> 16),
(uint8_t)((gnetif.ip_addr.addr) >> 24));
VNC_SERVER_LogMessage ((char *)iptxt);
/* Init VNC context and attach to layer (so context is updated if the display-layer-contents change */
GUI_VNC_AttachToLayer(&_Context, 0);
_Context.ServerIndex = 0;
GUI_VNC_SetProgName ("STM32 VNC Server");
if(VNC_LockState)
{
GUI_VNC_SetPassword((U8 *)"STM32");
}
else
{
GUI_VNC_SetAuthentication(NULL);
}
VNC_State = VNC_PROCESS;
break;
case VNC_PROCESS:
VNC_Process();
break;
case VNC_IDLE:
break;
default:
break;
}
osDelay(250);
}
}