nes-proj/core/net/mac/nullrdc.c

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/*
* Copyright (c) 2007, Swedish Institute of Computer Science.
* All rights reserved.
*
* 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.
*
* 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.
*
* $Id: nullrdc.c,v 1.3 2010/06/14 19:19:17 adamdunkels Exp $
*/
/**
* \file
* A MAC protocol that does not do anything.
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "net/mac/nullrdc.h"
#include "net/packetbuf.h"
#include "net/netstack.h"
/*---------------------------------------------------------------------------*/
static void
send_packet(mac_callback_t sent, void *ptr)
{
int ret;
if(NETSTACK_RADIO.send(packetbuf_hdrptr(), packetbuf_totlen()) == RADIO_TX_OK) {
ret = MAC_TX_OK;
} else {
ret = MAC_TX_ERR;
}
mac_call_sent_callback(sent, ptr, ret, 1);
}
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
NETSTACK_MAC.input();
}
/*---------------------------------------------------------------------------*/
static int
on(void)
{
return NETSTACK_RADIO.on();
}
/*---------------------------------------------------------------------------*/
static int
off(int keep_radio_on)
{
if(keep_radio_on) {
return NETSTACK_RADIO.on();
} else {
return NETSTACK_RADIO.off();
}
}
/*---------------------------------------------------------------------------*/
static unsigned short
channel_check_interval(void)
{
return 0;
}
/*---------------------------------------------------------------------------*/
static void
init(void)
{
on();
}
/*---------------------------------------------------------------------------*/
const struct rdc_driver nullrdc_driver = {
"nullrdc",
init,
send_packet,
packet_input,
on,
off,
channel_check_interval,
};
/*---------------------------------------------------------------------------*/