Projects/Webserver/Lib/uIPManagement.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2013.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2013  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 disclaims 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  *  uIP Management functions. This file contains the functions and globals needed to maintain the uIP
  34  *  stack once an RNDIS device has been attached to the system.
  35  */
  36
  37 #define  INCLUDE_FROM_UIPMANAGEMENT_C
  38 #include "uIPManagement.h"
  39
  40 /** Connection timer, to retain the time elapsed since the last time the uIP connections were managed. */
  41 static struct timer ConnectionTimer;
  42
  43 /** ARP timer, to retain the time elapsed since the ARP cache was last updated. */
  44 static struct timer ARPTimer;
  45
  46 /** MAC address of the RNDIS device, when enumerated. */
  47 struct uip_eth_addr MACAddress;
  48
  49
  50 /** Configures the uIP stack ready for network traffic processing. */
  51 void uIPManagement_Init(void)
  52 {
  53         /* uIP Timing Initialization */
  54         clock_init();
  55         timer_set(&ConnectionTimer, CLOCK_SECOND / 2);
  56         timer_set(&ARPTimer, CLOCK_SECOND * 10);
  57
  58         /* uIP Stack Initialization */
  59         uip_init();
  60         uip_arp_init();
  61
  62         /* DHCP/Server IP Settings Initialization */
  63         if (USB_CurrentMode == USB_MODE_Device)
  64         {
  65                 MACAddress.addr[0] = SERVER_MAC_ADDRESS[0];
  66                 MACAddress.addr[1] = SERVER_MAC_ADDRESS[1];
  67                 MACAddress.addr[2] = SERVER_MAC_ADDRESS[2];
  68                 MACAddress.addr[3] = SERVER_MAC_ADDRESS[3];
  69                 MACAddress.addr[4] = SERVER_MAC_ADDRESS[4];
  70                 MACAddress.addr[5] = SERVER_MAC_ADDRESS[5];
  71
  72                 #if defined(ENABLE_DHCP_SERVER)
  73                 DHCPServerApp_Init();
  74                 #endif
  75
  76                 uip_ipaddr_t IPAddress, Netmask, GatewayIPAddress;
  77                 uip_ipaddr(&IPAddress,        DEVICE_IP_ADDRESS[0], DEVICE_IP_ADDRESS[1], DEVICE_IP_ADDRESS[2], DEVICE_IP_ADDRESS[3]);
  78                 uip_ipaddr(&Netmask,          DEVICE_NETMASK[0],    DEVICE_NETMASK[1],    DEVICE_NETMASK[2],    DEVICE_NETMASK[3]);
  79                 uip_ipaddr(&GatewayIPAddress, DEVICE_GATEWAY[0],    DEVICE_GATEWAY[1],    DEVICE_GATEWAY[2],    DEVICE_GATEWAY[3]);
  80                 uip_sethostaddr(&IPAddress);
  81                 uip_setnetmask(&Netmask);
  82                 uip_setdraddr(&GatewayIPAddress);
  83         }
  84         else
  85         {
  86                 #if defined(ENABLE_DHCP_CLIENT)
  87                 DHCPClientApp_Init();
  88                 #else
  89                 uip_ipaddr_t IPAddress, Netmask, GatewayIPAddress;
  90                 uip_ipaddr(&IPAddress,        DEVICE_IP_ADDRESS[0], DEVICE_IP_ADDRESS[1], DEVICE_IP_ADDRESS[2], DEVICE_IP_ADDRESS[3]);
  91                 uip_ipaddr(&Netmask,          DEVICE_NETMASK[0],    DEVICE_NETMASK[1],    DEVICE_NETMASK[2],    DEVICE_NETMASK[3]);
  92                 uip_ipaddr(&GatewayIPAddress, DEVICE_GATEWAY[0],    DEVICE_GATEWAY[1],    DEVICE_GATEWAY[2],    DEVICE_GATEWAY[3]);
  93                 uip_sethostaddr(&IPAddress);
  94                 uip_setnetmask(&Netmask);
  95                 uip_setdraddr(&GatewayIPAddress);
  96                 #endif
  97         }
  98
  99         /* Virtual Webserver Ethernet Address Configuration */
 100         uip_setethaddr(MACAddress);
 101
 102         /* HTTP Webserver Initialization */
 103         HTTPServerApp_Init();
 104
 105         /* TELNET Server Initialization */
 106         #if defined(ENABLE_TELNET_SERVER)
 107         TELNETServerApp_Init();
 108         #endif
 109 }
 110
 111 /** uIP Management function. This function manages the uIP stack when called while an RNDIS device has been
 112  *  attached to the system.
 113  */
 114 void uIPManagement_ManageNetwork(void)
 115 {
 116         if (((USB_CurrentMode == USB_MODE_Host)   && (USB_HostState   == HOST_STATE_Configured)) ||
 117             ((USB_CurrentMode == USB_MODE_Device) && (USB_DeviceState == DEVICE_STATE_Configured)))
 118         {
 119                 uIPManagement_ProcessIncomingPacket();
 120                 uIPManagement_ManageConnections();
 121         }
 122 }
 123
 124 /** uIP TCP/IP network stack callback function for the processing of a given TCP connection. This routine dispatches
 125  *  to the appropriate TCP protocol application based on the connection's listen port number.
 126  */
 127 void uIPManagement_TCPCallback(void)
 128 {
 129         /* Call the correct TCP application based on the port number the connection is listening on */
 130         switch (uip_conn->lport)
 131         {
 132                 case HTONS(HTTP_SERVER_PORT):
 133                         HTTPServerApp_Callback();
 134                         break;
 135                 #if defined(ENABLE_TELNET_SERVER)
 136                 case HTONS(TELNET_SERVER_PORT):
 137                         TELNETServerApp_Callback();
 138                         break;
 139                 #endif
 140         }
 141 }
 142
 143 /** uIP TCP/IP network stack callback function for the processing of a given UDP connection. This routine dispatches
 144  *  to the appropriate UDP protocol application based on the connection's listen port number.
 145  */
 146 void uIPManagement_UDPCallback(void)
 147 {
 148         /* Call the correct UDP application based on the port number the connection is listening on */
 149         switch (uip_udp_conn->lport)
 150         {
 151                 #if defined(ENABLE_DHCP_CLIENT)
 152                 case HTONS(DHCP_CLIENT_PORT):
 153                         DHCPClientApp_Callback();
 154                         break;
 155                 #endif
 156                 #if defined(ENABLE_DHCP_SERVER)
 157                 case HTONS(DHCP_SERVER_PORT):
 158                         DHCPServerApp_Callback();
 159                         break;
 160                 #endif
 161         }
 162 }
 163
 164 /** Processes Incoming packets to the server from the connected RNDIS device, creating responses as needed. */
 165 static void uIPManagement_ProcessIncomingPacket(void)
 166 {
 167         /* Determine which USB mode the system is currently initialized in */
 168         if (USB_CurrentMode == USB_MODE_Device)
 169         {
 170                 /* If no packet received, exit processing routine */
 171                 if (!(RNDIS_Device_IsPacketReceived(&Ethernet_RNDIS_Interface_Device)))
 172                   return;
 173
 174                 LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 175
 176                 /* Read the Incoming packet straight into the UIP packet buffer */
 177                 RNDIS_Device_ReadPacket(&Ethernet_RNDIS_Interface_Device, uip_buf, &uip_len);
 178         }
 179         else
 180         {
 181                 /* If no packet received, exit processing routine */
 182                 if (!(RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface_Host)))
 183                   return;
 184
 185                 LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 186
 187                 /* Read the Incoming packet straight into the UIP packet buffer */
 188                 RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface_Host, uip_buf, &uip_len);
 189         }
 190
 191         /* If the packet contains an Ethernet frame, process it */
 192         if (uip_len > 0)
 193         {
 194                 switch (((struct uip_eth_hdr*)uip_buf)->type)
 195                 {
 196                         case HTONS(UIP_ETHTYPE_IP):
 197                                 /* Filter packet by MAC destination */
 198                                 uip_arp_ipin();
 199
 200                                 /* Process Incoming packet */
 201                                 uip_input();
 202
 203                                 /* If a response was generated, send it */
 204                                 if (uip_len > 0)
 205                                 {
 206                                         /* Add destination MAC to outgoing packet */
 207                                         uip_arp_out();
 208
 209                                         uip_split_output();
 210                                 }
 211
 212                                 break;
 213                         case HTONS(UIP_ETHTYPE_ARP):
 214                                 /* Process ARP packet */
 215                                 uip_arp_arpin();
 216
 217                                 /* If a response was generated, send it */
 218                                 if (uip_len > 0)
 219                                   uip_split_output();
 220
 221                                 break;
 222                 }
 223         }
 224
 225         LEDs_SetAllLEDs(LEDMASK_USB_READY);
 226 }
 227
 228 /** Manages the currently open network connections, including TCP and (if enabled) UDP. */
 229 static void uIPManagement_ManageConnections(void)
 230 {
 231         /* Poll TCP connections for more data to send back to the host */
 232         for (uint8_t i = 0; i < UIP_CONNS; i++)
 233         {
 234                 uip_poll_conn(&uip_conns[i]);
 235
 236                 /* If a response was generated, send it */
 237                 if (uip_len > 0)
 238                 {
 239                         /* Add destination MAC to outgoing packet */
 240                         uip_arp_out();
 241
 242                         /* Split and send the outgoing packet */
 243                         uip_split_output();
 244                 }
 245         }
 246
 247         /* Manage open connections for timeouts */
 248         if (timer_expired(&ConnectionTimer))
 249         {
 250                 timer_reset(&ConnectionTimer);
 251
 252                 LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 253
 254                 for (uint8_t i = 0; i < UIP_CONNS; i++)
 255                 {
 256                         /* Run periodic connection management for each TCP connection */
 257                         uip_periodic(i);
 258
 259                         /* If a response was generated, send it */
 260                         if (uip_len > 0)
 261                         {
 262                                 /* Add destination MAC to outgoing packet */
 263                                 uip_arp_out();
 264
 265                                 /* Split and send the outgoing packet */
 266                                 uip_split_output();
 267                         }
 268                 }
 269
 270                 #if defined(ENABLE_DHCP_CLIENT)
 271                 for (uint8_t i = 0; i < UIP_UDP_CONNS; i++)
 272                 {
 273                         /* Run periodic connection management for each UDP connection */
 274                         uip_udp_periodic(i);
 275
 276                         /* If a response was generated, send it */
 277                         if (uip_len > 0)
 278                         {
 279                                 /* Add destination MAC to outgoing packet */
 280                                 uip_arp_out();
 281
 282                                 /* Split and send the outgoing packet */
 283                                 uip_split_output();
 284                         }
 285                 }
 286                 #endif
 287
 288                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 289         }
 290
 291         /* Manage ARP cache refreshing */
 292         if (timer_expired(&ARPTimer))
 293         {
 294                 timer_reset(&ARPTimer);
 295                 uip_arp_timer();
 296         }
 297 }
 298