422 lines
11 KiB
C
422 lines
11 KiB
C
/* This file has been prepared for Doxygen automatic documentation generation.*/
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/*! \file rndis_task.c *********************************************************
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*
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* \brief
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* Manages the RNDIS Dataclass for the USB Device
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*
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* \addtogroup usbstick
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*
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* \author
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* Colin O'Flynn <coflynn@newae.com>
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*
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******************************************************************************/
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/* Copyright (c) 2008 ATMEL Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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distribution.
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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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\addtogroup RNDIS
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@{
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*/
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//_____ I N C L U D E S ___________________________________________________
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#include "contiki.h"
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#include "usb_drv.h"
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#include "usb_descriptors.h"
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#include "usb_specific_request.h"
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#include "rndis/rndis_task.h"
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#include "rndis/rndis_protocol.h"
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#include "uip.h"
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#include "sicslow_ethernet.h"
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#include <stdio.h>
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#include <avr/pgmspace.h>
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#include <util/delay.h>
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#define BUF ((struct uip_eth_hdr *)&uip_buf[0])
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#define PRINTF printf
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#define PRINTF_P printf_P
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//_____ M A C R O S ________________________________________________________
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//_____ D E F I N I T I O N S ______________________________________________
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#define IAD_TIMEOUT_DETACH 400
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#define IAD_TIMEOUT_ATTACH 800
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#define RNDIS_TIMEOUT_DETACH 900
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#define RNDIS_TIMEOUT_ATTACH 1000
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#define PBUF ((rndis_data_packet_t *) data_buffer)
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//_____ D E C L A R A T I O N S ____________________________________________
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//! Timers for LEDs
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uint8_t led1_timer, led2_timer;
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//! Temp data buffer when adding RNDIS headers
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uint8_t data_buffer[64];
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//! Usb is busy with RNDIS
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char usb_busy = 0;
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static struct etimer et;
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static struct timer flood_timer;
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static uint16_t iad_fail_timeout, rndis_fail_timeout;
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static uint8_t doInit = 1;
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extern uint8_t fingerPresent;
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PROCESS(rndis_process, "RNDIS process");
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/**
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* \brief RNDIS Process
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*
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* This is the link between USB and the "good stuff". In this routine data
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* is received and processed by RNDIS
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*/
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PROCESS_THREAD(rndis_process, ev, data_proc)
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{
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PROCESS_BEGIN();
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uint8_t bytecounter, headercounter;
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uint16_t i, dataoffset;
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while(1) {
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// turn off LED's if necessary
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if (led1_timer) led1_timer--;
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else Led1_off();
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if (led2_timer) led2_timer--;
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else Led2_off();
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/* Device is Enumerated but RNDIS not loading. We might
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have a system that does not support IAD (winXP). If so
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count the timeout then switch to just network interface. */
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if (usb_mode == rndis_debug) {
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//If we have timed out, detach
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if (iad_fail_timeout == IAD_TIMEOUT_DETACH) {
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//Failed - BUT we are using "reverse logic", hence we force device
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//into this mode. This is used to allow Windows Vista have time to
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//install the drivers
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if (fingerPresent && (rndis_state != rndis_data_initialized) && Is_device_enumerated() ) {
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iad_fail_timeout = 0;
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} else {
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stdout = NULL;
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Usb_detach();
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doInit = 1; //Also mark system as needing intilizing
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}
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//Then wait a few before re-attaching
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} else if (iad_fail_timeout == IAD_TIMEOUT_ATTACH) {
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if (fingerPresent) {
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usb_mode = mass_storage;
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} else {
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usb_mode = rndis_only;
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}
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Usb_attach();
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}
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//Increment timeout when device is not initializing, OR we have already detached,
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//OR the user had their finger on the device, indicating a reverse of logic
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if ( ( (rndis_state != rndis_data_initialized) && Is_device_enumerated() ) ||
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(iad_fail_timeout > IAD_TIMEOUT_DETACH) ||
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(fingerPresent) ) {
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iad_fail_timeout++;
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} else {
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iad_fail_timeout = 0;
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}
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} //usb_mode == rndis_debug
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/* Device is Enumerated but RNDIS STIL not loading. We just
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have RNDIS interface, so obviously no drivers on target.
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Just go ahead and mount ourselves as mass storage... */
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if (usb_mode == rndis_only) {
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//If we have timed out, detach
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if (rndis_fail_timeout == RNDIS_TIMEOUT_DETACH) {
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Usb_detach();
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//Then wait a few before re-attaching
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} else if (rndis_fail_timeout == RNDIS_TIMEOUT_ATTACH) {
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usb_mode = mass_storage;
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Usb_attach();
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}
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//Increment timeout when device is not initializing, OR we are already
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//counting to detach
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if ( ( (rndis_state != rndis_data_initialized)) ||
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(rndis_fail_timeout > RNDIS_TIMEOUT_DETACH) ) {
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rndis_fail_timeout++;
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} else {
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rndis_fail_timeout = 0;
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}
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}//usb_mode == rnids_only
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if(rndis_state == rndis_data_initialized) //Enumeration processs OK ?
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{
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if (doInit) {
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//start flood timer
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timer_set(&flood_timer, CLOCK_SECOND / 5);
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mac_ethernetSetup();
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doInit = 0;
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}
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//Connected!
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Led0_on();
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Usb_select_endpoint(RX_EP);
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//If we have data and a free buffer
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if(Is_usb_receive_out() && (uip_len == 0)) {
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//TODO: Fix this some better way
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//If you need a delay in RNDIS to slow down super-fast sending, insert it here
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//Also mark the USB as "in use"
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//This is done as "flood control" by only allowing one IP packet per time limit
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clock_time_t timediff = clock_time() - flood_timer.start;
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//If timer not yet expired
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if (timediff < flood_timer.interval) {
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//Wait until timer expiers
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usb_busy = 1;
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etimer_set(&et, flood_timer.interval - timediff);
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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//Reselect endpoint in case we lost it
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Usb_select_endpoint(RX_EP);
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usb_busy = 0;
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}
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//Restart flood timer
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timer_restart(&flood_timer);
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//Read how much (endpoint only stores up to 64 bytes anyway)
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bytecounter = Usb_byte_counter_8();
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//Try and read the header in
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headercounter = sizeof(rndis_data_packet_t);
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//Hmm.. what's going on here
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if (bytecounter < headercounter) {
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Usb_ack_receive_out();
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break;
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}
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i = 0;
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while (headercounter) {
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data_buffer[i] = Usb_read_byte();
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bytecounter--;
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headercounter--;
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i++;
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}
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//This is no good. Probably lost syncronization... just drop it for now
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if(PBUF->MessageType != REMOTE_NDIS_PACKET_MSG) {
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Usb_ack_receive_out();
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break;
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}
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//Looks like we've got a live one
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rx_start_led();
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//802.3 does not have OOB data, and we don't care about per-packet data
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//so that just leave regular packet data...
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if (PBUF->DataLength) {
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//Get offset
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dataoffset = PBUF->DataOffset;
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//Make it offset from start of message, not DataOffset field
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dataoffset += (sizeof(rndis_MessageType_t) + sizeof(rndis_MessageLength_t));
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//Subtract what we already took
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dataoffset -= sizeof(rndis_data_packet_t);
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//Read to the start of data
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while(dataoffset) {
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Usb_read_byte();
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dataoffset--;
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bytecounter--;
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//If endpoint is done
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if (bytecounter == 0) {
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Usb_ack_receive_out();
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//Wait for new data
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while (!Is_usb_receive_out());
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bytecounter = Usb_byte_counter_8();
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}
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}
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//Read the data itself in
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uint8_t * uipdata = uip_buf;
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uint16_t datalen = PBUF->DataLength;
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while(datalen) {
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*uipdata++ = Usb_read_byte();
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datalen--;
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bytecounter--;
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//If endpoint is done
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if (bytecounter == 0) {
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//Might be everything we need!
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if (datalen) {
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Usb_ack_receive_out();
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//Wait for new data
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while (!Is_usb_receive_out());
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bytecounter = Usb_byte_counter_8();
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}
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}
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}
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//Ack final data packet
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Usb_ack_receive_out();
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/*** SEND DATA TO UIP ***/
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if(BUF->type == htons(UIP_ETHTYPE_IPV6)) {
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//Send data over RF or to local stack
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uip_len = PBUF->DataLength; //uip_len includes LLH_LEN
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mac_ethernetToLowpan(uip_buf);
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}
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} //if (PBUF->DataLength)
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} //if(Is_usb_receive_out() && (uip_len == 0))
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} // if (rndis_data_intialized)
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if ((usb_mode == rndis_only) || (usb_mode == rndis_debug)) {
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etimer_set(&et, CLOCK_SECOND/80);
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} else {
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etimer_set(&et, CLOCK_SECOND);
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}
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PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
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} // while(1)
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PROCESS_END();
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}
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/**
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\brief Send data over RNDIS interface, data is in uipbuf and length is uiplen
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*/
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uint8_t rndis_send(uint8_t * senddata, uint16_t sendlen)
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{
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uint16_t i;
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//Setup Header
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PBUF->MessageType = REMOTE_NDIS_PACKET_MSG;
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PBUF->DataOffset = sizeof(rndis_data_packet_t) - sizeof(rndis_MessageType_t) - sizeof(rndis_MessageLength_t);
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PBUF->DataLength = sendlen;
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PBUF->OOBDataLength = 0;
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PBUF->OOBDataOffset = 0;
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PBUF->NumOOBDataElements = 0;
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PBUF->PerPacketInfoOffset = 0;
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PBUF->PerPacketInfoLength = 0;
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PBUF->DeviceVcHandle = 0;
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PBUF->Reserved = 0;
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PBUF->MessageLength = sizeof(rndis_data_packet_t) + PBUF->DataLength;
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//Send Data
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Usb_select_endpoint(TX_EP);
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Usb_send_in();
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//Wait for ready
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while(!Is_usb_write_enabled());
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//Setup first part of transfer...
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for(i = 0; i < sizeof(rndis_data_packet_t); i++) {
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Usb_write_byte(data_buffer[i]);
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}
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//Send packet
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while(sendlen) {
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Usb_write_byte(*senddata);
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senddata++;
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sendlen--;
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//If endpoint is full, send data in
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//And then wait for data to transfer
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if (!Is_usb_write_enabled()) {
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Usb_send_in();
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while(!Is_usb_write_enabled());
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}
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tx_end_led();
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}
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Usb_send_in();
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return 1;
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}
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/**
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@brief This will enable the RX_START LED for a period
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*/
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void rx_start_led(void)
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{
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Led1_on();
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led1_timer = 10;
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}
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/**
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@brief This will enable the TRX_END LED for a period
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*/
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void tx_end_led(void)
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{
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Led2_on();
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led2_timer = 10;
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}
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/** @} */
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