Projects/Webserver/Lib/uIPManagement.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  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  *  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 /** Indicates if an IP configuration has been set in the device. */
  50 bool HaveIPConfiguration;
  51
  52
  53 /** Configures the uIP stack ready for network traffic processing. */
  54 void uIPManagement_Init(void)
  55 {
  56         /* uIP Timing Initialization */
  57         clock_init();
  58         timer_set(&ConnectionTimer, CLOCK_SECOND / 2);
  59         timer_set(&ARPTimer, CLOCK_SECOND * 10);
  60
  61         /* uIP Stack Initialization */
  62         uip_init();
  63         uip_arp_init();
  64         uip_setethaddr(MACAddress);
  65
  66         /* DHCP/Server IP Settings Initialization */
  67         #if defined(ENABLE_DHCP_CLIENT)
  68         HaveIPConfiguration = false;
  69         DHCPClientApp_Init();
  70         #else
  71         HaveIPConfiguration = true;
  72         uip_ipaddr_t IPAddress, Netmask, GatewayIPAddress;
  73         uip_ipaddr(&IPAddress,        DEVICE_IP_ADDRESS[0], DEVICE_IP_ADDRESS[1], DEVICE_IP_ADDRESS[2], DEVICE_IP_ADDRESS[3]);
  74         uip_ipaddr(&Netmask,          DEVICE_NETMASK[0],    DEVICE_NETMASK[1],    DEVICE_NETMASK[2],    DEVICE_NETMASK[3]);
  75         uip_ipaddr(&GatewayIPAddress, DEVICE_GATEWAY[0],    DEVICE_GATEWAY[1],    DEVICE_GATEWAY[2],    DEVICE_GATEWAY[3]);
  76         uip_sethostaddr(&IPAddress);
  77         uip_setnetmask(&Netmask);
  78         uip_setdraddr(&GatewayIPAddress);
  79         #endif
  80
  81         /* HTTP Webserver Initialization */
  82         HTTPServerApp_Init();
  83
  84         /* TELNET Server Initialization */
  85         #if defined(ENABLE_TELNET_SERVER)
  86         TELNETServerApp_Init();
  87         #endif
  88 }
  89
  90 /** uIP Management function. This function manages the uIP stack when called while an RNDIS device has been
  91  *  attached to the system.
  92  */
  93 void uIPManagement_ManageNetwork(void)
  94 {
  95         if ((USB_CurrentMode == USB_MODE_Host) && (USB_HostState == HOST_STATE_Configured))
  96         {
  97                 uIPManagement_ProcessIncomingPacket();
  98                 uIPManagement_ManageConnections();
  99         }
 100 }
 101
 102 /** uIP TCP/IP network stack callback function for the processing of a given TCP connection. This routine dispatches
 103  *  to the appropriate TCP protocol application based on the connection's listen port number.
 104  */
 105 void uIPManagement_TCPCallback(void)
 106 {
 107         /* Call the correct TCP application based on the port number the connection is listening on */
 108         switch (uip_conn->lport)
 109         {
 110                 case HTONS(HTTP_SERVER_PORT):
 111                         HTTPServerApp_Callback();
 112                         break;
 113                 #if defined(ENABLE_TELNET_SERVER)
 114                 case HTONS(TELNET_SERVER_PORT):
 115                         TELNETServerApp_Callback();
 116                         break;
 117                 #endif
 118         }
 119 }
 120
 121 /** uIP TCP/IP network stack callback function for the processing of a given UDP connection. This routine dispatches
 122  *  to the appropriate UDP protocol application based on the connection's listen port number.
 123  */
 124 void uIPManagement_UDPCallback(void)
 125 {
 126         /* Call the correct UDP application based on the port number the connection is listening on */
 127         switch (uip_udp_conn->lport)
 128         {
 129                 case HTONS(DHCPC_CLIENT_PORT):
 130                         DHCPClientApp_Callback();
 131                         break;
 132         }
 133 }
 134
 135 /** Processes Incoming packets to the server from the connected RNDIS device, creating responses as needed. */
 136 static void uIPManagement_ProcessIncomingPacket(void)
 137 {
 138         /* If no packet received, exit processing routine */
 139         if (!(RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface)))
 140           return;
 141
 142         LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 143
 144         /* Read the Incoming packet straight into the UIP packet buffer */
 145         RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, uip_buf, &uip_len);
 146
 147         /* If the packet contains an Ethernet frame, process it */
 148         if (uip_len > 0)
 149         {
 150                 switch (((struct uip_eth_hdr*)uip_buf)->type)
 151                 {
 152                         case HTONS(UIP_ETHTYPE_IP):
 153                                 /* Filter packet by MAC destination */
 154                                 uip_arp_ipin();
 155
 156                                 /* Process Incoming packet */
 157                                 uip_input();
 158
 159                                 /* If a response was generated, send it */
 160                                 if (uip_len > 0)
 161                                 {
 162                                         /* Add destination MAC to outgoing packet */
 163                                         uip_arp_out();
 164
 165                                         uip_split_output();
 166                                 }
 167
 168                                 break;
 169                         case HTONS(UIP_ETHTYPE_ARP):
 170                                 /* Process ARP packet */
 171                                 uip_arp_arpin();
 172
 173                                 /* If a response was generated, send it */
 174                                 if (uip_len > 0)
 175                                   uip_split_output();
 176
 177                                 break;
 178                 }
 179         }
 180
 181         LEDs_SetAllLEDs(LEDMASK_USB_READY | ((HaveIPConfiguration) ? LEDMASK_UIP_READY_CONFIG : LEDMASK_UIP_READY_NOCONFIG));
 182 }
 183
 184 /** Manages the currently open network connections, including TCP and (if enabled) UDP. */
 185 static void uIPManagement_ManageConnections(void)
 186 {
 187         /* Poll TCP connections for more data to send back to the host */
 188         for (uint8_t i = 0; i < UIP_CONNS; i++)
 189         {
 190                 uip_poll_conn(&uip_conns[i]);
 191
 192                 /* If a response was generated, send it */
 193                 if (uip_len > 0)
 194                 {
 195                         /* Add destination MAC to outgoing packet */
 196                         uip_arp_out();
 197
 198                         /* Split and send the outgoing packet */
 199                         uip_split_output();
 200                 }
 201         }
 202
 203         /* Manage open connections for timeouts */
 204         if (timer_expired(&ConnectionTimer))
 205         {
 206                 timer_reset(&ConnectionTimer);
 207
 208                 LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
 209
 210                 for (uint8_t i = 0; i < UIP_CONNS; i++)
 211                 {
 212                         /* Run periodic connection management for each TCP connection */
 213                         uip_periodic(i);
 214
 215                         /* If a response was generated, send it */
 216                         if (uip_len > 0)
 217                         {
 218                                 /* Add destination MAC to outgoing packet */
 219                                 uip_arp_out();
 220
 221                                 /* Split and send the outgoing packet */
 222                                 uip_split_output();
 223                         }
 224                 }
 225
 226                 #if defined(ENABLE_DHCP_CLIENT)
 227                 for (uint8_t i = 0; i < UIP_UDP_CONNS; i++)
 228                 {
 229                         /* Run periodic connection management for each UDP connection */
 230                         uip_udp_periodic(i);
 231
 232                         /* If a response was generated, send it */
 233                         if (uip_len > 0)
 234                         {
 235                                 /* Add destination MAC to outgoing packet */
 236                                 uip_arp_out();
 237
 238                                 /* Split and send the outgoing packet */
 239                                 uip_split_output();
 240                         }
 241                 }
 242                 #endif
 243
 244                 LEDs_SetAllLEDs(LEDMASK_USB_READY);
 245         }
 246
 247         /* Manage ARP cache refreshing */
 248         if (timer_expired(&ARPTimer))
 249         {
 250                 timer_reset(&ARPTimer);
 251                 uip_arp_timer();
 252         }
 253 }
 254