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contiki/core/net/mac/nullrdc.c

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/*
* Copyright (c) 2010, 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.
*
*/
/**
* \file
* A null RDC implementation that uses framer for headers.
* \author
* Adam Dunkels <adam@sics.se>
* Niclas Finne <nfi@sics.se>
*/
#include "net/mac/mac-sequence.h"
#include "net/mac/nullrdc.h"
#include "net/packetbuf.h"
#include "net/queuebuf.h"
#include "net/netstack.h"
#include "net/rime/rimestats.h"
#include <string.h>
#if CONTIKI_TARGET_COOJA
#include "lib/simEnvChange.h"
#endif /* CONTIKI_TARGET_COOJA */
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#ifdef NULLRDC_CONF_ADDRESS_FILTER
#define NULLRDC_ADDRESS_FILTER NULLRDC_CONF_ADDRESS_FILTER
#else
#define NULLRDC_ADDRESS_FILTER 1
#endif /* NULLRDC_CONF_ADDRESS_FILTER */
#ifndef NULLRDC_802154_AUTOACK
#ifdef NULLRDC_CONF_802154_AUTOACK
#define NULLRDC_802154_AUTOACK NULLRDC_CONF_802154_AUTOACK
#else
#define NULLRDC_802154_AUTOACK 0
#endif /* NULLRDC_CONF_802154_AUTOACK */
#endif /* NULLRDC_802154_AUTOACK */
#ifndef NULLRDC_802154_AUTOACK_HW
#ifdef NULLRDC_CONF_802154_AUTOACK_HW
#define NULLRDC_802154_AUTOACK_HW NULLRDC_CONF_802154_AUTOACK_HW
#else
#define NULLRDC_802154_AUTOACK_HW 0
#endif /* NULLRDC_CONF_802154_AUTOACK_HW */
#endif /* NULLRDC_802154_AUTOACK_HW */
#if NULLRDC_802154_AUTOACK
#include "sys/rtimer.h"
#include "dev/watchdog.h"
#ifdef NULLRDC_CONF_ACK_WAIT_TIME
#define ACK_WAIT_TIME NULLRDC_CONF_ACK_WAIT_TIME
#else /* NULLRDC_CONF_ACK_WAIT_TIME */
#define ACK_WAIT_TIME RTIMER_SECOND / 2500
#endif /* NULLRDC_CONF_ACK_WAIT_TIME */
#ifdef NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME
#define AFTER_ACK_DETECTED_WAIT_TIME NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME
#else /* NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME */
#define AFTER_ACK_DETECTED_WAIT_TIME RTIMER_SECOND / 1500
#endif /* NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME */
#endif /* NULLRDC_802154_AUTOACK */
#ifdef NULLRDC_CONF_SEND_802154_ACK
#define NULLRDC_SEND_802154_ACK NULLRDC_CONF_SEND_802154_ACK
#else /* NULLRDC_CONF_SEND_802154_ACK */
#define NULLRDC_SEND_802154_ACK 0
#endif /* NULLRDC_CONF_SEND_802154_ACK */
#if NULLRDC_SEND_802154_ACK
#include "net/mac/frame802154.h"
#endif /* NULLRDC_SEND_802154_ACK */
#define ACK_LEN 3
/*---------------------------------------------------------------------------*/
static int
send_one_packet(mac_callback_t sent, void *ptr)
{
int ret;
int last_sent_ok = 0;
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &linkaddr_node_addr);
#if NULLRDC_802154_AUTOACK || NULLRDC_802154_AUTOACK_HW
packetbuf_set_attr(PACKETBUF_ATTR_MAC_ACK, 1);
#endif /* NULLRDC_802154_AUTOACK || NULLRDC_802154_AUTOACK_HW */
if(NETSTACK_FRAMER.create() < 0) {
/* Failed to allocate space for headers */
PRINTF("nullrdc: send failed, too large header\n");
ret = MAC_TX_ERR_FATAL;
} else {
#ifdef NETSTACK_ENCRYPT
NETSTACK_ENCRYPT();
#endif /* NETSTACK_ENCRYPT */
#if NULLRDC_802154_AUTOACK
int is_broadcast;
uint8_t dsn;
dsn = ((uint8_t *)packetbuf_hdrptr())[2] & 0xff;
NETSTACK_RADIO.prepare(packetbuf_hdrptr(), packetbuf_totlen());
is_broadcast = linkaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
&linkaddr_null);
if(NETSTACK_RADIO.receiving_packet() ||
(!is_broadcast && NETSTACK_RADIO.pending_packet())) {
/* Currently receiving a packet over air or the radio has
already received a packet that needs to be read before
sending with auto ack. */
ret = MAC_TX_COLLISION;
} else {
if(!is_broadcast) {
RIMESTATS_ADD(reliabletx);
}
switch(NETSTACK_RADIO.transmit(packetbuf_totlen())) {
case RADIO_TX_OK:
if(is_broadcast) {
ret = MAC_TX_OK;
} else {
rtimer_clock_t wt;
/* Check for ack */
wt = RTIMER_NOW();
watchdog_periodic();
while(RTIMER_CLOCK_LT(RTIMER_NOW(), wt + ACK_WAIT_TIME)) {
#if CONTIKI_TARGET_COOJA
simProcessRunValue = 1;
cooja_mt_yield();
#endif /* CONTIKI_TARGET_COOJA */
}
ret = MAC_TX_NOACK;
if(NETSTACK_RADIO.receiving_packet() ||
NETSTACK_RADIO.pending_packet() ||
NETSTACK_RADIO.channel_clear() == 0) {
int len;
uint8_t ackbuf[ACK_LEN];
if(AFTER_ACK_DETECTED_WAIT_TIME > 0) {
wt = RTIMER_NOW();
watchdog_periodic();
while(RTIMER_CLOCK_LT(RTIMER_NOW(),
wt + AFTER_ACK_DETECTED_WAIT_TIME)) {
#if CONTIKI_TARGET_COOJA
simProcessRunValue = 1;
cooja_mt_yield();
#endif /* CONTIKI_TARGET_COOJA */
}
}
if(NETSTACK_RADIO.pending_packet()) {
len = NETSTACK_RADIO.read(ackbuf, ACK_LEN);
if(len == ACK_LEN && ackbuf[2] == dsn) {
/* Ack received */
RIMESTATS_ADD(ackrx);
ret = MAC_TX_OK;
} else {
/* Not an ack or ack not for us: collision */
ret = MAC_TX_COLLISION;
}
}
} else {
PRINTF("nullrdc tx noack\n");
}
}
break;
case RADIO_TX_COLLISION:
ret = MAC_TX_COLLISION;
break;
default:
ret = MAC_TX_ERR;
break;
}
}
#else /* ! NULLRDC_802154_AUTOACK */
switch(NETSTACK_RADIO.send(packetbuf_hdrptr(), packetbuf_totlen())) {
case RADIO_TX_OK:
ret = MAC_TX_OK;
break;
case RADIO_TX_COLLISION:
ret = MAC_TX_COLLISION;
break;
case RADIO_TX_NOACK:
ret = MAC_TX_NOACK;
break;
default:
ret = MAC_TX_ERR;
break;
}
#endif /* ! NULLRDC_802154_AUTOACK */
}
if(ret == MAC_TX_OK) {
last_sent_ok = 1;
}
mac_call_sent_callback(sent, ptr, ret, 1);
return last_sent_ok;
}
/*---------------------------------------------------------------------------*/
static void
send_packet(mac_callback_t sent, void *ptr)
{
send_one_packet(sent, ptr);
}
/*---------------------------------------------------------------------------*/
static void
send_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list)
{
while(buf_list != NULL) {
/* We backup the next pointer, as it may be nullified by
* mac_call_sent_callback() */
struct rdc_buf_list *next = buf_list->next;
int last_sent_ok;
queuebuf_to_packetbuf(buf_list->buf);
last_sent_ok = send_one_packet(sent, ptr);
/* If packet transmission was not successful, we should back off and let
* upper layers retransmit, rather than potentially sending out-of-order
* packet fragments. */
if(!last_sent_ok) {
return;
}
buf_list = next;
}
}
/*---------------------------------------------------------------------------*/
static void
packet_input(void)
{
int original_datalen;
uint8_t *original_dataptr;
original_datalen = packetbuf_datalen();
original_dataptr = packetbuf_dataptr();
#ifdef NETSTACK_DECRYPT
NETSTACK_DECRYPT();
#endif /* NETSTACK_DECRYPT */
#if NULLRDC_802154_AUTOACK
if(packetbuf_datalen() == ACK_LEN) {
/* Ignore ack packets */
PRINTF("nullrdc: ignored ack\n");
} else
#endif /* NULLRDC_802154_AUTOACK */
if(NETSTACK_FRAMER.parse() < 0) {
PRINTF("nullrdc: failed to parse %u\n", packetbuf_datalen());
#if NULLRDC_ADDRESS_FILTER
} else if(!linkaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
&linkaddr_node_addr) &&
!linkaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
&linkaddr_null)) {
PRINTF("nullrdc: not for us\n");
#endif /* NULLRDC_ADDRESS_FILTER */
} else {
int duplicate = 0;
#if NULLRDC_802154_AUTOACK || NULLRDC_802154_AUTOACK_HW
/* Check for duplicate packet. */
duplicate = mac_sequence_is_duplicate();
if(duplicate) {
/* Drop the packet. */
PRINTF("nullrdc: drop duplicate link layer packet %u\n",
packetbuf_attr(PACKETBUF_ATTR_PACKET_ID));
} else {
mac_sequence_register_seqno();
}
#endif /* NULLRDC_802154_AUTOACK */
#if NULLRDC_SEND_802154_ACK
{
frame802154_t info154;
frame802154_parse(original_dataptr, original_datalen, &info154);
if(info154.fcf.frame_type == FRAME802154_DATAFRAME &&
info154.fcf.ack_required != 0 &&
linkaddr_cmp((linkaddr_t *)&info154.dest_addr,
&linkaddr_node_addr)) {
uint8_t ackdata[ACK_LEN] = {0, 0, 0};
ackdata[0] = FRAME802154_ACKFRAME;
ackdata[1] = 0;
ackdata[2] = info154.seq;
NETSTACK_RADIO.send(ackdata, ACK_LEN);
}
}
#endif /* NULLRDC_SEND_ACK */
if(!duplicate) {
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,
send_list,
packet_input,
on,
off,
channel_check_interval,
};
/*---------------------------------------------------------------------------*/
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