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248 lines
7.2 KiB
248 lines
7.2 KiB
/*
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LUFA Library
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Copyright (C) Dean Camera, 2010.
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dean [at] fourwalledcubicle [dot] com
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www.fourwalledcubicle.com
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*/
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/*
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Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaim all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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*
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* uIP Management functions. This file contains the functions and globals needed to maintain the uIP
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* stack once an RNDIS device has been attached to the system.
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*/
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#define INCLUDE_FROM_UIPMANAGEMENT_C
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#include "uIPManagement.h"
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/** Connection timer, to retain the time elapsed since the last time the uIP connections were managed. */
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struct timer ConnectionTimer;
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/** ARP timer, to retain the time elapsed since the ARP cache was last updated. */
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struct timer ARPTimer;
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/** MAC address of the RNDIS device, when enumerated */
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struct uip_eth_addr MACAddress;
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bool HaveIPConfiguration;
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/** Configures the uIP stack ready for network traffic. */
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void uIPManagement_Init(void)
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{
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/* uIP Timing Initialization */
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clock_init();
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timer_set(&ConnectionTimer, CLOCK_SECOND / 2);
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timer_set(&ARPTimer, CLOCK_SECOND * 10);
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/* uIP Stack Initialization */
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uip_init();
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uip_arp_init();
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uip_setethaddr(MACAddress);
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/* DHCP/Server IP Settings Initialization */
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#if defined(ENABLE_DHCP_CLIENT)
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HaveIPConfiguration = false;
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DHCPClientApp_Init();
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#else
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HaveIPConfiguration = true;
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uip_ipaddr_t IPAddress, Netmask, GatewayIPAddress;
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uip_ipaddr(&IPAddress, DEVICE_IP_ADDRESS[0], DEVICE_IP_ADDRESS[1], DEVICE_IP_ADDRESS[2], DEVICE_IP_ADDRESS[3]);
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uip_ipaddr(&Netmask, DEVICE_NETMASK[0], DEVICE_NETMASK[1], DEVICE_NETMASK[2], DEVICE_NETMASK[3]);
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uip_ipaddr(&GatewayIPAddress, DEVICE_GATEWAY[0], DEVICE_GATEWAY[1], DEVICE_GATEWAY[2], DEVICE_GATEWAY[3]);
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uip_sethostaddr(&IPAddress);
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uip_setnetmask(&Netmask);
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uip_setdraddr(&GatewayIPAddress);
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#endif
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/* HTTP Webserver Initialization */
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HTTPServerApp_Init();
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/* TELNET Server Initialization */
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TELNETServerApp_Init();
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}
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/** uIP Management function. This function manages the uIP stack when called while an RNDIS device has been
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* attached to the system.
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*/
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void uIPManagement_ManageNetwork(void)
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{
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if ((USB_CurrentMode == USB_MODE_HOST) && (USB_HostState == HOST_STATE_Configured))
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{
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uIPManagement_ProcessIncomingPacket();
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uIPManagement_ManageConnections();
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}
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}
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/** uIP TCP/IP network stack callback function for the processing of a given TCP connection. This routine dispatches
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* to the appropriate TCP protocol application based on the connection's listen port number.
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*/
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void uIPManagement_TCPCallback(void)
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{
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/* Call the correct TCP application based on the port number the connection is listening on */
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switch (uip_conn->lport)
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{
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case HTONS(HTTP_SERVER_PORT):
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HTTPServerApp_Callback();
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break;
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case HTONS(TELNET_SERVER_PORT):
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TELNETServerApp_Callback();
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break;
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}
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}
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/** uIP TCP/IP network stack callback function for the processing of a given UDP connection. This routine dispatches
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* to the appropriate UDP protocol application based on the connection's listen port number.
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*/
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void uIPManagement_UDPCallback(void)
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{
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/* Call the correct UDP application based on the port number the connection is listening on */
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switch (uip_udp_conn->lport)
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{
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case HTONS(DHCPC_CLIENT_PORT):
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DHCPClientApp_Callback();
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break;
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}
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}
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/** Processes Incoming packets to the server from the connected RNDIS device, creating responses as needed. */
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static void uIPManagement_ProcessIncomingPacket(void)
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{
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/* If no packet received, exit processing routine */
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if (!(RNDIS_Host_IsPacketReceived(&Ethernet_RNDIS_Interface)))
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return;
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LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
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/* Read the Incoming packet straight into the UIP packet buffer */
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RNDIS_Host_ReadPacket(&Ethernet_RNDIS_Interface, uip_buf, &uip_len);
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/* If the packet contains an Ethernet frame, process it */
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if (uip_len > 0)
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{
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switch (((struct uip_eth_hdr*)uip_buf)->type)
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{
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case HTONS(UIP_ETHTYPE_IP):
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/* Filter packet by MAC destination */
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uip_arp_ipin();
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/* Process Incoming packet */
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uip_input();
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/* If a response was generated, send it */
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if (uip_len > 0)
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{
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/* Add destination MAC to outgoing packet */
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uip_arp_out();
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uip_split_output();
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}
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break;
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case HTONS(UIP_ETHTYPE_ARP):
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/* Process ARP packet */
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uip_arp_arpin();
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/* If a response was generated, send it */
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if (uip_len > 0)
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uip_split_output();
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break;
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}
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}
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LEDs_SetAllLEDs(LEDMASK_USB_READY | ((HaveIPConfiguration) ? LEDMASK_UIP_READY_CONFIG : LEDMASK_UIP_READY_NOCONFIG));
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}
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/** Manages the currently open network connections, including TCP and (if enabled) UDP. */
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static void uIPManagement_ManageConnections(void)
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{
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/* Poll TCP connections for more data to send back to the host */
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for (uint8_t i = 0; i < UIP_CONNS; i++)
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{
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uip_poll_conn(&uip_conns[i]);
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/* If a response was generated, send it */
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if (uip_len > 0)
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{
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/* Add destination MAC to outgoing packet */
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uip_arp_out();
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/* Split and send the outgoing packet */
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uip_split_output();
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}
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}
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/* Manage open connections for timeouts */
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if (timer_expired(&ConnectionTimer))
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{
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timer_reset(&ConnectionTimer);
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LEDs_SetAllLEDs(LEDMASK_USB_BUSY);
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for (uint8_t i = 0; i < UIP_CONNS; i++)
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{
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/* Run periodic connection management for each TCP connection */
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uip_periodic(i);
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/* If a response was generated, send it */
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if (uip_len > 0)
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{
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/* Add destination MAC to outgoing packet */
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uip_arp_out();
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/* Split and send the outgoing packet */
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uip_split_output();
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}
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}
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#if defined(ENABLE_DHCP_CLIENT)
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for (uint8_t i = 0; i < UIP_UDP_CONNS; i++)
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{
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/* Run periodic connection management for each UDP connection */
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uip_udp_periodic(i);
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/* If a response was generated, send it */
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if (uip_len > 0)
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{
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/* Add destination MAC to outgoing packet */
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uip_arp_out();
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/* Split and send the outgoing packet */
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uip_split_output();
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}
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}
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#endif
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LEDs_SetAllLEDs(LEDMASK_USB_READY);
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}
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/* Manage ARP cache refreshing */
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if (timer_expired(&ARPTimer))
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{
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timer_reset(&ARPTimer);
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uip_arp_timer();
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}
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}
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