111 lines
3.6 KiB
C
111 lines
3.6 KiB
C
/*
|
|
* 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: nullmac.c,v 1.9 2009/03/12 21:58:20 adamdunkels Exp $
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* A MAC protocol that does not do anything.
|
|
* \author
|
|
* Adam Dunkels <adam@sics.se>
|
|
*/
|
|
|
|
#include "net/mac/nullmac.h"
|
|
#include "net/rime/packetbuf.h"
|
|
|
|
static const struct radio_driver *radio;
|
|
static void (* receiver_callback)(const struct mac_driver *);
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
send_packet(void)
|
|
{
|
|
return radio->send(packetbuf_hdrptr(), packetbuf_totlen());
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
input_packet(const struct radio_driver *d)
|
|
{
|
|
if(receiver_callback) {
|
|
receiver_callback(&nullmac_driver);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
read_packet(void)
|
|
{
|
|
int len;
|
|
packetbuf_clear();
|
|
len = radio->read(packetbuf_dataptr(), PACKETBUF_SIZE);
|
|
packetbuf_set_datalen(len);
|
|
return len;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static void
|
|
set_receive_function(void (* recv)(const struct mac_driver *))
|
|
{
|
|
receiver_callback = recv;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
on(void)
|
|
{
|
|
return radio->on();
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
off(int keep_radio_on)
|
|
{
|
|
if(keep_radio_on) {
|
|
return radio->on();
|
|
} else {
|
|
return radio->off();
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct mac_driver nullmac_driver = {
|
|
"nullmac",
|
|
send_packet,
|
|
read_packet,
|
|
set_receive_function,
|
|
on,
|
|
off,
|
|
};
|
|
/*---------------------------------------------------------------------------*/
|
|
const struct mac_driver *
|
|
nullmac_init(const struct radio_driver *d)
|
|
{
|
|
radio = d;
|
|
radio->set_receive_function(input_packet);
|
|
radio->on();
|
|
return &nullmac_driver;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|