Projects/Webserver/Webserver.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 /** \file
  32  *
  33  *  Main source file for the Webserver project. This file contains the main tasks of
  34  *  the project and is responsible for the initial application hardware configuration.
  35  */
  36
  37 #include "Webserver.h"
  38
  39 /** LUFA RNDIS Class driver interface configuration and state information. This structure is
  40  *  passed to all RNDIS Class driver functions, so that multiple instances of the same class
  41  *  within a device can be differentiated from one another.
  42  */
  43 USB_ClassInfo_RNDIS_Host_t Ethernet_RNDIS_Interface =
  44         {
  45                 .Config =
  46                         {
  47                                 .DataINPipeNumber           = 1,
  48                                 .DataINPipeDoubleBank       = false,
  49
  50                                 .DataOUTPipeNumber          = 2,
  51                                 .DataOUTPipeDoubleBank      = false,
  52
  53                                 .NotificationPipeNumber     = 3,
  54                                 .NotificationPipeDoubleBank = false,
  55
  56                                 .HostMaxPacketSize          = UIP_CONF_BUFFER_SIZE,
  57                         },
  58         };
  59
  60 /** Connection timer, to retain the time elapsed since the last time the uIP connections were managed. */
  61 struct timer ConnectionTimer;
  62
  63 /** ARP timer, to retain the time elapsed since the ARP cache was last updated. */
  64 struct timer ARPTimer;
  65
  66 /** MAC address of the RNDIS device, when enumerated */
  67 struct uip_eth_addr MACAddress;
  68
  69 /** Main program entry point. This routine configures the hardware required by the application, then
  70  *  enters a loop to run the application tasks in sequence.
  71  */
  72 int main(void)
  73 {
  74         SetupHardware();
  75
  76         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
  77
  78         for (;;)
  79         {
  80                 switch (USB_HostState)
  81                 {
  82                         case HOST_STATE_Addressed:
  83                                 LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
  84
  85                                 uint16_t ConfigDescriptorSize;
  86                                 uint8_t  ConfigDescriptorData[512];
  87
  88                                 if (USB_Host_GetDeviceConfigDescriptor(1, &ConfigDescriptorSize, ConfigDescriptorData,
  89                                                                        sizeof(ConfigDescriptorData)) != HOST_GETCONFIG_Successful)
  90                                 {
  91                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
  92                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
  93                                         break;
  94                                 }
  95
  96                                 if (RNDIS_Host_ConfigurePipes(&Ethernet_RNDIS_Interface,
  97                                                               ConfigDescriptorSize, ConfigDescriptorData) != RNDIS_ENUMERROR_NoError)
  98                                 {
  99                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 100                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 101                                         break;
 102                                 }
 103
 104                                 if (USB_Host_SetDeviceConfiguration(1) != HOST_SENDCONTROL_Successful)
 105                                 {
 106                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 107                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 108                                         break;
 109                                 }
 110
 111                                 if (RNDIS_Host_InitializeDevice(&Ethernet_RNDIS_Interface) != HOST_SENDCONTROL_Successful)
 112                                 {
 113                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 114                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 115                                         break;
 116                                 }
 117
 118                                 uint32_t PacketFilter = (REMOTE_NDIS_PACKET_DIRECTED | REMOTE_NDIS_PACKET_BROADCAST);
 119                                 if (RNDIS_Host_SetRNDISProperty(&Ethernet_RNDIS_Interface, OID_GEN_CURRENT_PACKET_FILTER,
 120                                                                 &PacketFilter, sizeof(PacketFilter)) != HOST_SENDCONTROL_Successful)
 121                                 {
 122                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 123                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 124                                         break;
 125                                 }
 126
 127                                 if (RNDIS_Host_QueryRNDISProperty(&Ethernet_RNDIS_Interface, OID_802_3_CURRENT_ADDRESS,
 128                                                                   &MACAddress, sizeof(MACAddress)) != HOST_SENDCONTROL_Successful)
 129                                 {
 130                                         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 131                                         USB_HostState = HOST_STATE_WaitForDeviceRemoval;
 132                                         break;
 133                                 }
 134
 135                                 uip_setethaddr(MACAddress);
 136
 137                                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 138                                 USB_HostState = HOST_STATE_Configured;
 139                                 break;
 140                         case HOST_STATE_Configured:
 141                                 ProcessIncommingPacket();
 142                                 ManageConnections();
 143
 144                                 break;
 145                 }
 146
 147                 RNDIS_Host_USBTask(&Ethernet_RNDIS_Interface);
 148                 USB_USBTask();
 149         }
 150 }
 151
 152 void ProcessIncommingPacket(void)
 153 {
 154         if (RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface))
 155         {
 156                 LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 157
 158                 /* Read the incomming packet straight into the UIP packet buffer */
 159                 RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], &uip_len);
 160
 161                 if (uip_len > 0)
 162                 {
 163                         bool PacketHandled = true;
 164
 165                         struct uip_eth_hdr* EthernetHeader = (struct uip_eth_hdr*)&uip_buf[0];
 166                         if (EthernetHeader->type == HTONS(UIP_ETHTYPE_IP))
 167                         {
 168                                 /* Filter packet by MAC destination */
 169                                 uip_arp_ipin();
 170
 171                                 /* Process incomming packet */
 172                                 uip_input();
 173
 174                                 /* Add destination MAC to outgoing packet */
 175                                 if (uip_len > 0)
 176                                   uip_arp_out();
 177                         }
 178                         else if (EthernetHeader->type == HTONS(UIP_ETHTYPE_ARP))
 179                         {
 180                                 /* Process ARP packet */
 181                                 uip_arp_arpin();
 182                         }
 183                         else
 184                         {
 185                                 PacketHandled = false;
 186                         }
 187
 188                         /* If a response was generated, send it */
 189                         if ((uip_len > 0) && PacketHandled)
 190                           RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], uip_len);
 191                 }
 192
 193                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 194         }
 195 }
 196
 197 void ManageConnections(void)
 198 {
 199         /* Manage open connections */
 200         if (timer_expired(&ConnectionTimer))
 201         {
 202                 timer_reset(&ConnectionTimer);
 203
 204                 LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 205
 206                 for (uint8_t i = 0; i < UIP_CONNS; i++)
 207                 {
 208                         /* Run periodic connection management for each TCP connection */
 209                         uip_periodic(i);
 210
 211                         /* If a response was generated, send it */
 212                         if (uip_len > 0)
 213                         {
 214                                 /* Add destination MAC to outgoing packet */
 215                                 uip_arp_out();
 216
 217                                 RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], uip_len);
 218                         }
 219                 }
 220
 221                 #if defined(ENABLE_DHCP)
 222                 for (uint8_t i = 0; i < UIP_UDP_CONNS; i++)
 223                 {
 224                         /* Run periodic connection management for each UDP connection */
 225                         uip_udp_periodic(i);
 226
 227                         /* If a response was generated, send it */
 228                         if (uip_len > 0)
 229                         {
 230                                 /* Add destination MAC to outgoing packet */
 231                                 uip_arp_out();
 232
 233                                 RNDIS_Host_SendPacket(&Ethernet_RNDIS_Interface, &uip_buf[0], uip_len);
 234                         }
 235                 }
 236                 #endif
 237
 238                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 239         }
 240
 241         /* Manage ARP cache refreshing */
 242         if (timer_expired(&ARPTimer))
 243         {
 244                 timer_reset(&ARPTimer);
 245                 uip_arp_timer();
 246         }
 247 }
 248
 249 /** Configures the board hardware and chip peripherals for the demo's functionality. */
 250 void SetupHardware(void)
 251 {
 252         /* Disable watchdog if enabled by bootloader/fuses */
 253         MCUSR &= ~(1 << WDRF);
 254         wdt_disable();
 255
 256         /* Disable clock division */
 257         clock_prescale_set(clock_div_1);
 258
 259         /* Hardware Initialization */
 260         LEDs_Init();
 261         USB_Init();
 262
 263         /* uIP Timing Initialization */
 264         clock_init();
 265         timer_set(&ConnectionTimer, CLOCK_SECOND / 2);
 266         timer_set(&ARPTimer, CLOCK_SECOND * 10);
 267
 268         /* uIP Stack Initialization */
 269         uip_init();
 270
 271         /* DHCP/Server IP Settings Initialization */
 272         #if defined(ENABLE_DHCP)
 273         DHCPApp_Init();
 274         #else
 275         uip_ipaddr_t IPAddress, Netmask, GatewayIPAddress;
 276         uip_ipaddr(&IPAddress,        DEVICE_IP_ADDRESS[0], DEVICE_IP_ADDRESS[1], DEVICE_IP_ADDRESS[2], DEVICE_IP_ADDRESS[3]);
 277         uip_ipaddr(&Netmask,          DEVICE_NETMASK[0],    DEVICE_NETMASK[1],    DEVICE_NETMASK[2],    DEVICE_NETMASK[3]);
 278         uip_ipaddr(&GatewayIPAddress, DEVICE_GATEWAY[0],    DEVICE_GATEWAY[1],    DEVICE_GATEWAY[2],    DEVICE_GATEWAY[3]);
 279         uip_sethostaddr(&IPAddress);
 280         uip_setnetmask(&Netmask);
 281         uip_setdraddr(&GatewayIPAddress);
 282         #endif
 283
 284         /* HTTP Webserver Initialization */
 285         WebserverApp_Init();
 286 }
 287
 288 /** Event handler for the USB_DeviceAttached event. This indicates that a device has been attached to the host, and
 289  *  starts the library USB task to begin the enumeration and USB management process.
 290  */
 291 void EVENT_USB_Host_DeviceAttached(void)
 292 {
 293         LEDs_SetAllLEDs(LEDMASK_USB_ENUMERATING);
 294 }
 295
 296 /** Event handler for the USB_DeviceUnattached event. This indicates that a device has been removed from the host, and
 297  *  stops the library USB task management process.
 298  */
 299 void EVENT_USB_Host_DeviceUnattached(void)
 300 {
 301         LEDs_SetAllLEDs(LEDMASK_USB_NOTREADY);
 302 }
 303
 304 /** Event handler for the USB_DeviceEnumerationComplete event. This indicates that a device has been successfully
 305  *  enumerated by the host and is now ready to be used by the application.
 306  */
 307 void EVENT_USB_Host_DeviceEnumerationComplete(void)
 308 {
 309         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 310 }
 311
 312 /** Event handler for the USB_HostError event. This indicates that a hardware error occurred while in host mode. */
 313 void EVENT_USB_Host_HostError(const uint8_t ErrorCode)
 314 {
 315         USB_ShutDown();
 316
 317         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 318         for(;;);
 319 }
 320
 321 /** Event handler for the USB_DeviceEnumerationFailed event. This indicates that a problem occurred while
 322  *  enumerating an attached USB device.
 323  */
 324 void EVENT_USB_Host_DeviceEnumerationFailed(const uint8_t ErrorCode, const uint8_t SubErrorCode)
 325 {
 326         LEDs_SetAllLEDs(LEDMASK_USB_ERROR);
 327 }