nes-proj/os/net/nullnet/nullnet.c

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/*
* Copyright (c) 2017, RISE SICS.
* 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.
*
*/
/**
* \file
* NullNet, a minimal network layer.
* \author
* Simon Duquennoy <simon.duquennoy@ri.se>
*
*/
/**
* \addtogroup nullnet
* @{
*/
#include "contiki.h"
#include "net/packetbuf.h"
#include "net/netstack.h"
#include "net/nullnet/nullnet.h"
/* Log configuration */
#include "sys/log.h"
#define LOG_MODULE "NullNet"
#define LOG_LEVEL LOG_LEVEL_NULLNET
uint8_t *nullnet_buf;
uint16_t nullnet_len;
static nullnet_input_callback current_callback = NULL;
/*--------------------------------------------------------------------*/
static void
init(void)
{
LOG_INFO("init\n");
current_callback = NULL;
}
/*--------------------------------------------------------------------*/
static void
input(void)
{
if(current_callback != NULL) {
LOG_INFO("received %u bytes from ", packetbuf_datalen());
LOG_INFO_LLADDR(packetbuf_addr(PACKETBUF_ADDR_SENDER));
LOG_INFO_("\n");
current_callback(packetbuf_dataptr(), packetbuf_datalen(),
packetbuf_addr(PACKETBUF_ADDR_SENDER), packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
}
}
/*--------------------------------------------------------------------*/
void
nullnet_set_input_callback(nullnet_input_callback callback)
{
current_callback = callback;
}
/*--------------------------------------------------------------------*/
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static uint8_t
output(const linkaddr_t *dest)
{
packetbuf_clear();
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packetbuf_copyfrom(nullnet_buf, nullnet_len);
if(dest != NULL) {
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, dest);
} else {
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, &linkaddr_null);
}
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &linkaddr_node_addr);
LOG_INFO("sending %u bytes to ", packetbuf_datalen());
LOG_INFO_LLADDR(packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
LOG_INFO_("\n");
NETSTACK_MAC.send(NULL, NULL);
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return 1;
}
/*--------------------------------------------------------------------*/
const struct network_driver nullnet_driver = {
"nullnet",
init,
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input,
output
};
/*--------------------------------------------------------------------*/
/** @} */