nes-proj/platform/netsim/net/ethernode-drv.c

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/*
* Copyright (c) 2004, Swedish Institute of Computer Science.
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* All rights reserved.
*
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
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*
* Author: Adam Dunkels <adam@sics.se>
*
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* $Id: ethernode-drv.c,v 1.4 2006/10/10 15:58:31 adamdunkels Exp $
*/
#include "contiki.h"
#include "ethernode.h"
#include "net/uip-fw.h"
#include "net/hc.h"
#include "net/tapdev.h"
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#include "node-id.h"
PROCESS(ethernode_drv_process, "Ethernode driver");
enum { NULLEVENT };
/*---------------------------------------------------------------------------*/
u8_t
ethernode_drv_send(void)
{
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uip_len = hc_compress(&uip_buf[UIP_LLH_LEN], uip_len);
return ethernode_send();
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(ethernode_drv_process, ev, data)
{
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static int drop = 3;
PROCESS_BEGIN();
while(1) {
process_poll(&ethernode_drv_process);
PROCESS_WAIT_EVENT();
/* Poll Ethernet device to see if there is a frame avaliable. */
uip_len = ethernode_poll();
if(uip_len > 0) {
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/* printf("%d: new packet len %d\n", node_id, uip_len);*/
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/* if((random_rand() % drop) <= drop / 2) {
printf("Bropp\n");
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} else*/ {
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uip_len = hc_inflate(&uip_buf[UIP_LLH_LEN], uip_len);
tapdev_send_raw();
/* if(uip_fw_forward() == UIP_FW_LOCAL)*/ {
/* A frame was avaliable (and is now read into the uip_buf), so
we process it. */
tcpip_input();
}
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/