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Merging csma and nullrdc

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This commit is contained in:
Simon Duquennoy 2017-05-17 21:47:48 +02:00
parent b81e039e34
commit 880e69f770
21 changed files with 738 additions and 761 deletions
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584
core/net/mac/csma-output.c Normal file
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@ -0,0 +1,584 @@
/*
* 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
* The 802.15.4 standard CSMA protocol (nonbeacon-enabled).
* Output functions.
* \author
* Adam Dunkels <adam@sics.se>
* Simon Duquennoy <simon.duquennoy@ri.se>
*/
#include "net/mac/csma.h"
#include "net/packetbuf.h"
#include "net/queuebuf.h"
#include "dev/watchdog.h"
#include "sys/ctimer.h"
#include "sys/clock.h"
#include "lib/random.h"
#include "net/netstack.h"
#include "lib/list.h"
#include "lib/memb.h"
#include <string.h>
#include <stdio.h>
#if CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64
#include "lib/simEnvChange.h"
#include "sys/cooja_mt.h"
#endif /* CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64 */
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else /* DEBUG */
#define PRINTF(...)
#endif /* DEBUG */
/* Constants of the IEEE 802.15.4 standard */
/* macMinBE: Initial backoff exponent. Range 0--CSMA_MAX_BE */
#ifdef CSMA_CONF_MIN_BE
#define CSMA_MIN_BE CSMA_CONF_MIN_BE
#else
#define CSMA_MIN_BE 0
#endif
/* macMaxBE: Maximum backoff exponent. Range 3--8 */
#ifdef CSMA_CONF_MAX_BE
#define CSMA_MAX_BE CSMA_CONF_MAX_BE
#else
#define CSMA_MAX_BE 4
#endif
/* macMaxCSMABackoffs: Maximum number of backoffs in case of channel busy/collision. Range 0--5 */
#ifdef CSMA_CONF_MAX_BACKOFF
#define CSMA_MAX_BACKOFF CSMA_CONF_MAX_BACKOFF
#else
#define CSMA_MAX_BACKOFF 5
#endif
/* macMaxFrameRetries: Maximum number of re-transmissions attampts. Range 0--7 */
#ifdef CSMA_CONF_MAX_FRAME_RETRIES
#define CSMA_MAX_MAX_FRAME_RETRIES CSMA_CONF_MAX_FRAME_RETRIES
#else
#define CSMA_MAX_MAX_FRAME_RETRIES 7
#endif
/* Packet metadata */
struct qbuf_metadata {
mac_callback_t sent;
void *cptr;
uint8_t max_transmissions;
};
/* Every neighbor has its own packet queue */
struct neighbor_queue {
struct neighbor_queue *next;
linkaddr_t addr;
struct ctimer transmit_timer;
uint8_t transmissions;
uint8_t collisions;
LIST_STRUCT(packet_queue);
};
/* The maximum number of co-existing neighbor queues */
#ifdef CSMA_CONF_MAX_NEIGHBOR_QUEUES
#define CSMA_MAX_NEIGHBOR_QUEUES CSMA_CONF_MAX_NEIGHBOR_QUEUES
#else
#define CSMA_MAX_NEIGHBOR_QUEUES 2
#endif /* CSMA_CONF_MAX_NEIGHBOR_QUEUES */
/* The maximum number of pending packet per neighbor */
#ifdef CSMA_CONF_MAX_PACKET_PER_NEIGHBOR
#define CSMA_MAX_PACKET_PER_NEIGHBOR CSMA_CONF_MAX_PACKET_PER_NEIGHBOR
#else
#define CSMA_MAX_PACKET_PER_NEIGHBOR MAX_QUEUED_PACKETS
#endif /* CSMA_CONF_MAX_PACKET_PER_NEIGHBOR */
#define MAX_QUEUED_PACKETS QUEUEBUF_NUM
/* Neighbor packet queue */
struct packet_queue {
struct packet_queue *next;
struct queuebuf *buf;
void *ptr;
};
MEMB(neighbor_memb, struct neighbor_queue, CSMA_MAX_NEIGHBOR_QUEUES);
MEMB(packet_memb, struct packet_queue, MAX_QUEUED_PACKETS);
MEMB(metadata_memb, struct qbuf_metadata, MAX_QUEUED_PACKETS);
LIST(neighbor_list);
static void packet_sent(void *ptr, int status, int num_transmissions);
static void transmit_from_queue(void *ptr);
/*---------------------------------------------------------------------------*/
static struct neighbor_queue *
neighbor_queue_from_addr(const linkaddr_t *addr)
{
struct neighbor_queue *n = list_head(neighbor_list);
while(n != NULL) {
if(linkaddr_cmp(&n->addr, addr)) {
return n;
}
n = list_item_next(n);
}
return NULL;
}
/*---------------------------------------------------------------------------*/
static clock_time_t
backoff_period(void)
{
/* Use the default in IEEE 802.15.4: aUnitBackoffPeriod which is
* 20 symbols i.e. 320 usec. That is, 1/3125 second. */
return MAX(CLOCK_SECOND / 3125, 1);
}
/*---------------------------------------------------------------------------*/
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 CSMA_802154_AUTOACK || CSMA_802154_AUTOACK_HW
packetbuf_set_attr(PACKETBUF_ATTR_MAC_ACK, 1);
#endif /* CSMA_802154_AUTOACK || CSMA_802154_AUTOACK_HW */
if(NETSTACK_FRAMER.create() < 0) {
/* Failed to allocate space for headers */
PRINTF("csma: send failed, too large header\n");
ret = MAC_TX_ERR_FATAL;
} else {
#if CSMA_802154_AUTOACK
int is_broadcast;
uint8_t dsn;
dsn = ((uint8_t *)packetbuf_hdrptr())[2] & 0xff;
NETSTACK_RADIO.prepare(packetbuf_hdrptr(), packetbuf_totlen());
is_broadcast = packetbuf_holds_broadcast();
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 + CSMA_ACK_WAIT_TIME)) {
#if CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64
simProcessRunValue = 1;
cooja_mt_yield();
#endif /* CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64 */
}
ret = MAC_TX_NOACK;
if(NETSTACK_RADIO.receiving_packet() ||
NETSTACK_RADIO.pending_packet() ||
NETSTACK_RADIO.channel_clear() == 0) {
int len;
uint8_t ackbuf[CSMA_ACK_LEN];
if(CSMA_AFTER_ACK_DETECTED_WAIT_TIME > 0) {
wt = RTIMER_NOW();
watchdog_periodic();
while(RTIMER_CLOCK_LT(RTIMER_NOW(),
wt + CSMA_AFTER_ACK_DETECTED_WAIT_TIME)) {
#if CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64
simProcessRunValue = 1;
cooja_mt_yield();
#endif /* CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64 */
}
}
if(NETSTACK_RADIO.pending_packet()) {
len = NETSTACK_RADIO.read(ackbuf, CSMA_ACK_LEN);
if(len == CSMA_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("csma tx noack\n");
}
}
break;
case RADIO_TX_COLLISION:
ret = MAC_TX_COLLISION;
break;
default:
ret = MAC_TX_ERR;
break;
}
}
#else /* !CSMA_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 /* !CSMA_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
transmit_from_queue(void *ptr)
{
struct neighbor_queue *n = ptr;
if(n) {
struct packet_queue *q = list_head(n->packet_queue);
if(q != NULL) {
PRINTF("csma: preparing number %d %p, queue len %d\n", n->transmissions, q,
list_length(n->packet_queue));
/* Send first packet in the neighbor queue */
queuebuf_to_packetbuf(q->buf);
send_one_packet(packet_sent, n);
}
}
}
/*---------------------------------------------------------------------------*/
static void
schedule_transmission(struct neighbor_queue *n)
{
clock_time_t delay;
int backoff_exponent; /* BE in IEEE 802.15.4 */
backoff_exponent = MIN(n->collisions, CSMA_MAX_BE);
/* Compute max delay as per IEEE 802.15.4: 2^BE-1 backoff periods */
delay = ((1 << backoff_exponent) - 1) * backoff_period();
if(delay > 0) {
/* Pick a time for next transmission */
delay = random_rand() % delay;
}
PRINTF("csma: scheduling transmission in %u ticks, NB=%u, BE=%u\n",
(unsigned)delay, n->collisions, backoff_exponent);
ctimer_set(&n->transmit_timer, delay, transmit_from_queue, n);
}
/*---------------------------------------------------------------------------*/
static void
free_packet(struct neighbor_queue *n, struct packet_queue *p, int status)
{
if(p != NULL) {
/* Remove packet from queue and deallocate */
list_remove(n->packet_queue, p);
queuebuf_free(p->buf);
memb_free(&metadata_memb, p->ptr);
memb_free(&packet_memb, p);
PRINTF("csma: free_queued_packet, queue length %d, free packets %d\n",
list_length(n->packet_queue), memb_numfree(&packet_memb));
if(list_head(n->packet_queue) != NULL) {
/* There is a next packet. We reset current tx information */
n->transmissions = 0;
n->collisions = CSMA_MIN_BE;
/* Schedule next transmissions */
schedule_transmission(n);
} else {
/* This was the last packet in the queue, we free the neighbor */
ctimer_stop(&n->transmit_timer);
list_remove(neighbor_list, n);
memb_free(&neighbor_memb, n);
}
}
}
/*---------------------------------------------------------------------------*/
static void
tx_done(int status, struct packet_queue *q, struct neighbor_queue *n)
{
mac_callback_t sent;
struct qbuf_metadata *metadata;
void *cptr;
uint8_t ntx;
metadata = (struct qbuf_metadata *)q->ptr;
sent = metadata->sent;
cptr = metadata->cptr;
ntx = n->transmissions;
switch(status) {
case MAC_TX_OK:
PRINTF("csma: rexmit ok %d\n", n->transmissions);
break;
case MAC_TX_COLLISION:
case MAC_TX_NOACK:
PRINTF("csma: drop with status %d after %d transmissions, %d collisions\n",
status, n->transmissions, n->collisions);
break;
default:
PRINTF("csma: rexmit failed %d: %d\n", n->transmissions, status);
break;
}
free_packet(n, q, status);
mac_call_sent_callback(sent, cptr, status, ntx);
}
/*---------------------------------------------------------------------------*/
static void
rexmit(struct packet_queue *q, struct neighbor_queue *n)
{
schedule_transmission(n);
/* This is needed to correctly attribute energy that we spent
transmitting this packet. */
queuebuf_update_attr_from_packetbuf(q->buf);
}
/*---------------------------------------------------------------------------*/
static void
collision(struct packet_queue *q, struct neighbor_queue *n,
int num_transmissions)
{
struct qbuf_metadata *metadata;
metadata = (struct qbuf_metadata *)q->ptr;
n->collisions += num_transmissions;
if(n->collisions > CSMA_MAX_BACKOFF) {
n->collisions = CSMA_MIN_BE;
/* Increment to indicate a next retry */
n->transmissions++;
}
if(n->transmissions >= metadata->max_transmissions) {
tx_done(MAC_TX_COLLISION, q, n);
} else {
PRINTF("csma: rexmit collision %d\n", n->transmissions);
rexmit(q, n);
}
}
/*---------------------------------------------------------------------------*/
static void
noack(struct packet_queue *q, struct neighbor_queue *n, int num_transmissions)
{
struct qbuf_metadata *metadata;
metadata = (struct qbuf_metadata *)q->ptr;
n->collisions = CSMA_MIN_BE;
n->transmissions += num_transmissions;
if(n->transmissions >= metadata->max_transmissions) {
tx_done(MAC_TX_NOACK, q, n);
} else {
PRINTF("csma: rexmit noack %d\n", n->transmissions);
rexmit(q, n);
}
}
/*---------------------------------------------------------------------------*/
static void
tx_ok(struct packet_queue *q, struct neighbor_queue *n, int num_transmissions)
{
n->collisions = CSMA_MIN_BE;
n->transmissions += num_transmissions;
tx_done(MAC_TX_OK, q, n);
}
/*---------------------------------------------------------------------------*/
static void
packet_sent(void *ptr, int status, int num_transmissions)
{
struct neighbor_queue *n;
struct packet_queue *q;
n = ptr;
if(n == NULL) {
return;
}
/* Find out what packet this callback refers to */
for(q = list_head(n->packet_queue);
q != NULL; q = list_item_next(q)) {
if(queuebuf_attr(q->buf, PACKETBUF_ATTR_MAC_SEQNO) ==
packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO)) {
break;
}
}
if(q == NULL) {
PRINTF("csma: seqno %d not found\n",
packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO));
return;
} else if(q->ptr == NULL) {
PRINTF("csma: no metadata\n");
return;
}
switch(status) {
case MAC_TX_OK:
tx_ok(q, n, num_transmissions);
break;
case MAC_TX_NOACK:
noack(q, n, num_transmissions);
break;
case MAC_TX_COLLISION:
collision(q, n, num_transmissions);
break;
case MAC_TX_DEFERRED:
break;
default:
tx_done(status, q, n);
break;
}
}
/*---------------------------------------------------------------------------*/
void
csma_output_packet(mac_callback_t sent, void *ptr)
{
struct packet_queue *q;
struct neighbor_queue *n;
static uint8_t initialized = 0;
static uint16_t seqno;
const linkaddr_t *addr = packetbuf_addr(PACKETBUF_ADDR_RECEIVER);
if(!initialized) {
initialized = 1;
/* Initialize the sequence number to a random value as per 802.15.4. */
seqno = random_rand();
}
if(seqno == 0) {
/* PACKETBUF_ATTR_MAC_SEQNO cannot be zero, due to a pecuilarity
in framer-802154.c. */
seqno++;
}
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, seqno++);
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_TYPE, FRAME802154_DATAFRAME);
/* Look for the neighbor entry */
n = neighbor_queue_from_addr(addr);
if(n == NULL) {
/* Allocate a new neighbor entry */
n = memb_alloc(&neighbor_memb);
if(n != NULL) {
/* Init neighbor entry */
linkaddr_copy(&n->addr, addr);
n->transmissions = 0;
n->collisions = CSMA_MIN_BE;
/* Init packet queue for this neighbor */
LIST_STRUCT_INIT(n, packet_queue);
/* Add neighbor to the neighbor list */
list_add(neighbor_list, n);
}
}
if(n != NULL) {
/* Add packet to the neighbor's queue */
if(list_length(n->packet_queue) < CSMA_MAX_PACKET_PER_NEIGHBOR) {
q = memb_alloc(&packet_memb);
if(q != NULL) {
q->ptr = memb_alloc(&metadata_memb);
if(q->ptr != NULL) {
q->buf = queuebuf_new_from_packetbuf();
if(q->buf != NULL) {
struct qbuf_metadata *metadata = (struct qbuf_metadata *)q->ptr;
/* Neighbor and packet successfully allocated */
metadata->max_transmissions = CSMA_MAX_MAX_FRAME_RETRIES + 1;
metadata->sent = sent;
metadata->cptr = ptr;
list_add(n->packet_queue, q);
PRINTF("csma: send_packet, queue length %d, free packets %d\n",
list_length(n->packet_queue), memb_numfree(&packet_memb));
/* If q is the first packet in the neighbor's queue, send asap */
if(list_head(n->packet_queue) == q) {
schedule_transmission(n);
}
return;
}
memb_free(&metadata_memb, q->ptr);
PRINTF("csma: could not allocate queuebuf, dropping packet\n");
}
memb_free(&packet_memb, q);
PRINTF("csma: could not allocate queuebuf, dropping packet\n");
}
/* The packet allocation failed. Remove and free neighbor entry if empty. */
if(list_length(n->packet_queue) == 0) {
list_remove(neighbor_list, n);
memb_free(&neighbor_memb, n);
}
} else {
PRINTF("csma: Neighbor queue full\n");
}
PRINTF("csma: could not allocate packet, dropping packet\n");
} else {
PRINTF("csma: could not allocate neighbor, dropping packet\n");
}
mac_call_sent_callback(sent, ptr, MAC_TX_ERR, 1);
}
/*---------------------------------------------------------------------------*/
void
csma_output_init(void)
{
memb_init(&packet_memb);
memb_init(&metadata_memb);
memb_init(&neighbor_memb);
}

26
core/net/mac/nullrdc.h → core/net/mac/csma-output.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* Copyright (c) 2007, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -32,26 +32,20 @@
/**
* \file
* A null RDC implementation that uses framer for headers.
* The 802.15.4 standard CSMA protocol (nonbeacon-enabled).
* Output functions.
* \author
* Adam Dunkels <adam@sics.se>
* Niclas Finne <nfi@sics.se>
* Simon Duquennoy <simon.duquennoy@ri.se>
*/
#ifndef NULLRDC_H_
#define NULLRDC_H_
#ifndef CSMA_OUTPUT_H_
#define CSMA_OUTPUT_H_
#include "contiki-conf.h"
#include "net/mac/mac.h"
/* List of packets to be sent by RDC layer */
struct rdc_buf_list {
struct rdc_buf_list *next;
struct queuebuf *buf;
void *ptr;
};
void csma_output_packet(mac_callback_t sent, void *ptr);
void csma_output_init(void);
void nullrdc_send_list(mac_callback_t sent, void *ptr, struct rdc_buf_list *buf_list);
void nullrdc_packet_input(void);
#endif /* NULLRDC_H_ */
#endif /* CSMA_OUTPUT_H_ */

448
core/net/mac/csma.c
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@ -32,28 +32,19 @@
/**
* \file
* A Carrier Sense Multiple Access (CSMA) MAC layer
* The 802.15.4 standard CSMA protocol (nonbeacon-enabled)
* \author
* Adam Dunkels <adam@sics.se>
* Simon Duquennoy <simon.duquennoy@ri.se>
*/
#include "net/mac/csma.h"
#include "net/mac/nullrdc.h"
#include "net/mac/csma-output.h"
#include "net/mac/mac-sequence.h"
#include "net/packetbuf.h"
#include "net/queuebuf.h"
#include "sys/ctimer.h"
#include "sys/clock.h"
#include "lib/random.h"
#include "net/netstack.h"
#include "lib/list.h"
#include "lib/memb.h"
#include <string.h>
#include <stdio.h>
#define DEBUG 0
@ -64,385 +55,72 @@
#define PRINTF(...)
#endif /* DEBUG */
/* Constants of the IEEE 802.15.4 standard */
/* macMinBE: Initial backoff exponent. Range 0--CSMA_MAX_BE */
#ifdef CSMA_CONF_MIN_BE
#define CSMA_MIN_BE CSMA_CONF_MIN_BE
#else
#define CSMA_MIN_BE 0
#endif
/* macMaxBE: Maximum backoff exponent. Range 3--8 */
#ifdef CSMA_CONF_MAX_BE
#define CSMA_MAX_BE CSMA_CONF_MAX_BE
#else
#define CSMA_MAX_BE 4
#endif
/* macMaxCSMABackoffs: Maximum number of backoffs in case of channel busy/collision. Range 0--5 */
#ifdef CSMA_CONF_MAX_BACKOFF
#define CSMA_MAX_BACKOFF CSMA_CONF_MAX_BACKOFF
#else
#define CSMA_MAX_BACKOFF 5
#endif
/* macMaxFrameRetries: Maximum number of re-transmissions attampts. Range 0--7 */
#ifdef CSMA_CONF_MAX_FRAME_RETRIES
#define CSMA_MAX_MAX_FRAME_RETRIES CSMA_CONF_MAX_FRAME_RETRIES
#else
#define CSMA_MAX_MAX_FRAME_RETRIES 7
#endif
/* Packet metadata */
struct qbuf_metadata {
mac_callback_t sent;
void *cptr;
uint8_t max_transmissions;
};
/* Every neighbor has its own packet queue */
struct neighbor_queue {
struct neighbor_queue *next;
linkaddr_t addr;
struct ctimer transmit_timer;
uint8_t transmissions;
uint8_t collisions;
LIST_STRUCT(queued_packet_list);
};
/* The maximum number of co-existing neighbor queues */
#ifdef CSMA_CONF_MAX_NEIGHBOR_QUEUES
#define CSMA_MAX_NEIGHBOR_QUEUES CSMA_CONF_MAX_NEIGHBOR_QUEUES
#else
#define CSMA_MAX_NEIGHBOR_QUEUES 2
#endif /* CSMA_CONF_MAX_NEIGHBOR_QUEUES */
/* The maximum number of pending packet per neighbor */
#ifdef CSMA_CONF_MAX_PACKET_PER_NEIGHBOR
#define CSMA_MAX_PACKET_PER_NEIGHBOR CSMA_CONF_MAX_PACKET_PER_NEIGHBOR
#else
#define CSMA_MAX_PACKET_PER_NEIGHBOR MAX_QUEUED_PACKETS
#endif /* CSMA_CONF_MAX_PACKET_PER_NEIGHBOR */
#define MAX_QUEUED_PACKETS QUEUEBUF_NUM
MEMB(neighbor_memb, struct neighbor_queue, CSMA_MAX_NEIGHBOR_QUEUES);
MEMB(packet_memb, struct rdc_buf_list, MAX_QUEUED_PACKETS);
MEMB(metadata_memb, struct qbuf_metadata, MAX_QUEUED_PACKETS);
LIST(neighbor_list);
static void packet_sent(void *ptr, int status, int num_transmissions);
static void transmit_packet_list(void *ptr);
/*---------------------------------------------------------------------------*/
static struct neighbor_queue *
neighbor_queue_from_addr(const linkaddr_t *addr)
{
struct neighbor_queue *n = list_head(neighbor_list);
while(n != NULL) {
if(linkaddr_cmp(&n->addr, addr)) {
return n;
}
n = list_item_next(n);
}
return NULL;
}
/*---------------------------------------------------------------------------*/
static clock_time_t
backoff_period(void)
{
/* Use the default in IEEE 802.15.4: aUnitBackoffPeriod which is
* 20 symbols i.e. 320 usec. That is, 1/3125 second. */
return MAX(CLOCK_SECOND / 3125, 1);
}
/*---------------------------------------------------------------------------*/
static void
transmit_packet_list(void *ptr)
{
struct neighbor_queue *n = ptr;
if(n) {
struct rdc_buf_list *q = list_head(n->queued_packet_list);
if(q != NULL) {
PRINTF("csma: preparing number %d %p, queue len %d\n", n->transmissions, q,
list_length(n->queued_packet_list));
/* Send packets in the neighbor's list */
nullrdc_send_list(packet_sent, n, q);
}
}
}
/*---------------------------------------------------------------------------*/
static void
schedule_transmission(struct neighbor_queue *n)
{
clock_time_t delay;
int backoff_exponent; /* BE in IEEE 802.15.4 */
backoff_exponent = MIN(n->collisions, CSMA_MAX_BE);
/* Compute max delay as per IEEE 802.15.4: 2^BE-1 backoff periods */
delay = ((1 << backoff_exponent) - 1) * backoff_period();
if(delay > 0) {
/* Pick a time for next transmission */
delay = random_rand() % delay;
}
PRINTF("csma: scheduling transmission in %u ticks, NB=%u, BE=%u\n",
(unsigned)delay, n->collisions, backoff_exponent);
ctimer_set(&n->transmit_timer, delay, transmit_packet_list, n);
}
/*---------------------------------------------------------------------------*/
static void
free_packet(struct neighbor_queue *n, struct rdc_buf_list *p, int status)
{
if(p != NULL) {
/* Remove packet from list and deallocate */
list_remove(n->queued_packet_list, p);
queuebuf_free(p->buf);
memb_free(&metadata_memb, p->ptr);
memb_free(&packet_memb, p);
PRINTF("csma: free_queued_packet, queue length %d, free packets %d\n",
list_length(n->queued_packet_list), memb_numfree(&packet_memb));
if(list_head(n->queued_packet_list) != NULL) {
/* There is a next packet. We reset current tx information */
n->transmissions = 0;
n->collisions = CSMA_MIN_BE;
/* Schedule next transmissions */
schedule_transmission(n);
} else {
/* This was the last packet in the queue, we free the neighbor */
ctimer_stop(&n->transmit_timer);
list_remove(neighbor_list, n);
memb_free(&neighbor_memb, n);
}
}
}
/*---------------------------------------------------------------------------*/
static void
tx_done(int status, struct rdc_buf_list *q, struct neighbor_queue *n)
{
mac_callback_t sent;
struct qbuf_metadata *metadata;
void *cptr;
uint8_t ntx;
metadata = (struct qbuf_metadata *)q->ptr;
sent = metadata->sent;
cptr = metadata->cptr;
ntx = n->transmissions;
switch(status) {
case MAC_TX_OK:
PRINTF("csma: rexmit ok %d\n", n->transmissions);
break;
case MAC_TX_COLLISION:
case MAC_TX_NOACK:
PRINTF("csma: drop with status %d after %d transmissions, %d collisions\n",
status, n->transmissions, n->collisions);
break;
default:
PRINTF("csma: rexmit failed %d: %d\n", n->transmissions, status);
break;
}
free_packet(n, q, status);
mac_call_sent_callback(sent, cptr, status, ntx);
}
/*---------------------------------------------------------------------------*/
static void
rexmit(struct rdc_buf_list *q, struct neighbor_queue *n)
{
schedule_transmission(n);
/* This is needed to correctly attribute energy that we spent
transmitting this packet. */
queuebuf_update_attr_from_packetbuf(q->buf);
}
/*---------------------------------------------------------------------------*/
static void
collision(struct rdc_buf_list *q, struct neighbor_queue *n,
int num_transmissions)
{
struct qbuf_metadata *metadata;
metadata = (struct qbuf_metadata *)q->ptr;
n->collisions += num_transmissions;
if(n->collisions > CSMA_MAX_BACKOFF) {
n->collisions = CSMA_MIN_BE;
/* Increment to indicate a next retry */
n->transmissions++;
}
if(n->transmissions >= metadata->max_transmissions) {
tx_done(MAC_TX_COLLISION, q, n);
} else {
PRINTF("csma: rexmit collision %d\n", n->transmissions);
rexmit(q, n);
}
}
/*---------------------------------------------------------------------------*/
static void
noack(struct rdc_buf_list *q, struct neighbor_queue *n, int num_transmissions)
{
struct qbuf_metadata *metadata;
metadata = (struct qbuf_metadata *)q->ptr;
n->collisions = CSMA_MIN_BE;
n->transmissions += num_transmissions;
if(n->transmissions >= metadata->max_transmissions) {
tx_done(MAC_TX_NOACK, q, n);
} else {
PRINTF("csma: rexmit noack %d\n", n->transmissions);
rexmit(q, n);
}
}
/*---------------------------------------------------------------------------*/
static void
tx_ok(struct rdc_buf_list *q, struct neighbor_queue *n, int num_transmissions)
{
n->collisions = CSMA_MIN_BE;
n->transmissions += num_transmissions;
tx_done(MAC_TX_OK, q, n);
}
/*---------------------------------------------------------------------------*/
static void
packet_sent(void *ptr, int status, int num_transmissions)
{
struct neighbor_queue *n;
struct rdc_buf_list *q;
n = ptr;
if(n == NULL) {
return;
}
/* Find out what packet this callback refers to */
for(q = list_head(n->queued_packet_list);
q != NULL; q = list_item_next(q)) {
if(queuebuf_attr(q->buf, PACKETBUF_ATTR_MAC_SEQNO) ==
packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO)) {
break;
}
}
if(q == NULL) {
PRINTF("csma: seqno %d not found\n",
packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO));
return;
} else if(q->ptr == NULL) {
PRINTF("csma: no metadata\n");
return;
}
switch(status) {
case MAC_TX_OK:
tx_ok(q, n, num_transmissions);
break;
case MAC_TX_NOACK:
noack(q, n, num_transmissions);
break;
case MAC_TX_COLLISION:
collision(q, n, num_transmissions);
break;
case MAC_TX_DEFERRED:
break;
default:
tx_done(status, q, n);
break;
}
}
/*---------------------------------------------------------------------------*/
static void
send_packet(mac_callback_t sent, void *ptr)
{
struct rdc_buf_list *q;
struct neighbor_queue *n;
static uint8_t initialized = 0;
static uint16_t seqno;
const linkaddr_t *addr = packetbuf_addr(PACKETBUF_ADDR_RECEIVER);
if(!initialized) {
initialized = 1;
/* Initialize the sequence number to a random value as per 802.15.4. */
seqno = random_rand();
}
if(seqno == 0) {
/* PACKETBUF_ATTR_MAC_SEQNO cannot be zero, due to a pecuilarity
in framer-802154.c. */
seqno++;
}
packetbuf_set_attr(PACKETBUF_ATTR_MAC_SEQNO, seqno++);
packetbuf_set_attr(PACKETBUF_ATTR_FRAME_TYPE, FRAME802154_DATAFRAME);
/* Look for the neighbor entry */
n = neighbor_queue_from_addr(addr);
if(n == NULL) {
/* Allocate a new neighbor entry */
n = memb_alloc(&neighbor_memb);
if(n != NULL) {
/* Init neighbor entry */
linkaddr_copy(&n->addr, addr);
n->transmissions = 0;
n->collisions = CSMA_MIN_BE;
/* Init packet list for this neighbor */
LIST_STRUCT_INIT(n, queued_packet_list);
/* Add neighbor to the list */
list_add(neighbor_list, n);
}
}
if(n != NULL) {
/* Add packet to the neighbor's queue */
if(list_length(n->queued_packet_list) < CSMA_MAX_PACKET_PER_NEIGHBOR) {
q = memb_alloc(&packet_memb);
if(q != NULL) {
q->ptr = memb_alloc(&metadata_memb);
if(q->ptr != NULL) {
q->buf = queuebuf_new_from_packetbuf();
if(q->buf != NULL) {
struct qbuf_metadata *metadata = (struct qbuf_metadata *)q->ptr;
/* Neighbor and packet successfully allocated */
metadata->max_transmissions = CSMA_MAX_MAX_FRAME_RETRIES + 1;
metadata->sent = sent;
metadata->cptr = ptr;
list_add(n->queued_packet_list, q);
PRINTF("csma: send_packet, queue length %d, free packets %d\n",
list_length(n->queued_packet_list), memb_numfree(&packet_memb));
/* If q is the first packet in the neighbor's queue, send asap */
if(list_head(n->queued_packet_list) == q) {
schedule_transmission(n);
}
return;
}
memb_free(&metadata_memb, q->ptr);
PRINTF("csma: could not allocate queuebuf, dropping packet\n");
}
memb_free(&packet_memb, q);
PRINTF("csma: could not allocate queuebuf, dropping packet\n");
}
/* The packet allocation failed. Remove and free neighbor entry if empty. */
if(list_length(n->queued_packet_list) == 0) {
list_remove(neighbor_list, n);
memb_free(&neighbor_memb, n);
}
} else {
PRINTF("csma: Neighbor queue full\n");
}
PRINTF("csma: could not allocate packet, dropping packet\n");
} else {
PRINTF("csma: could not allocate neighbor, dropping packet\n");
}
mac_call_sent_callback(sent, ptr, MAC_TX_ERR, 1);
csma_output_packet(sent, ptr);
}
/*---------------------------------------------------------------------------*/
static void
input_packet(void)
{
nullrdc_packet_input();
#if CSMA_SEND_802154_ACK
int original_datalen;
uint8_t *original_dataptr;
original_datalen = packetbuf_datalen();
original_dataptr = packetbuf_dataptr();
#endif
#if CSMA_802154_AUTOACK
if(packetbuf_datalen() == CSMA_ACK_LEN) {
/* Ignore ack packets */
PRINTF("csma: ignored ack\n");
} else
#endif /* CSMA_802154_AUTOACK */
if(NETSTACK_FRAMER.parse() < 0) {
PRINTF("csma: failed to parse %u\n", packetbuf_datalen());
} else if(!linkaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
&linkaddr_node_addr) &&
!packetbuf_holds_broadcast()) {
PRINTF("csma: not for us\n");
} else {
int duplicate = 0;
#if CSMA_802154_AUTOACK || CSMA_802154_AUTOACK_HW
/* Check for duplicate packet. */
duplicate = mac_sequence_is_duplicate();
if(duplicate) {
/* Drop the packet. */
PRINTF("csma: drop duplicate link layer packet %u\n",
packetbuf_attr(PACKETBUF_ATTR_MAC_SEQNO));
} else {
mac_sequence_register_seqno();
}
#endif /* CSMA_802154_AUTOACK */
#if CSMA_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[CSMA_ACK_LEN] = {0, 0, 0};
ackdata[0] = FRAME802154_ACKFRAME;
ackdata[1] = 0;
ackdata[2] = info154.seq;
NETSTACK_RADIO.send(ackdata, CSMA_ACK_LEN);
}
}
#endif /* CSMA_SEND_802154_ACK */
if(!duplicate) {
NETSTACK_NETWORK.input();
}
}
}
/*---------------------------------------------------------------------------*/
static int
@ -460,9 +138,7 @@ off(void)
static void
init(void)
{
memb_init(&packet_memb);
memb_init(&metadata_memb);
memb_init(&neighbor_memb);
csma_output_init();
on();
}
/*---------------------------------------------------------------------------*/

43
core/net/mac/csma.h
View File

@ -32,20 +32,55 @@
/**
* \file
* A MAC stack protocol that performs retransmissions when the
* underlying MAC layer has problems with collisions
* The 802.15.4 standard CSMA protocol (nonbeacon-enabled)
* \author
* Adam Dunkels <adam@sics.se>
* Simon Duquennoy <simon.duquennoy@ri.se>
*/
#ifndef CSMA_H_
#define CSMA_H_
#include "contiki-conf.h"
#include "net/mac/mac.h"
#include "dev/radio.h"
#ifndef CSMA_802154_AUTOACK
#ifdef CSMA_CONF_802154_AUTOACK
#define CSMA_802154_AUTOACK CSMA_CONF_802154_AUTOACK
#else
#define CSMA_802154_AUTOACK 0
#endif /* CSMA_CONF_802154_AUTOACK */
#endif /* CSMA_802154_AUTOACK */
#ifndef CSMA_802154_AUTOACK_HW
#ifdef CSMA_CONF_802154_AUTOACK_HW
#define CSMA_802154_AUTOACK_HW CSMA_CONF_802154_AUTOACK_HW
#else
#define CSMA_802154_AUTOACK_HW 0
#endif /* CSMA_CONF_802154_AUTOACK_HW */
#endif /* CSMA_802154_AUTOACK_HW */
#ifdef CSMA_CONF_ACK_WAIT_TIME
#define CSMA_ACK_WAIT_TIME CSMA_CONF_ACK_WAIT_TIME
#else /* CSMA_CONF_ACK_WAIT_TIME */
#define CSMA_ACK_WAIT_TIME RTIMER_SECOND / 2500
#endif /* CSMA_CONF_ACK_WAIT_TIME */
#ifdef CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME
#define CSMA_AFTER_ACK_DETECTED_WAIT_TIME CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME
#else /* CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME */
#define CSMA_AFTER_ACK_DETECTED_WAIT_TIME RTIMER_SECOND / 1500
#endif /* CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME */
#ifdef CSMA_CONF_SEND_802154_ACK
#define CSMA_SEND_802154_ACK CSMA_CONF_SEND_802154_ACK
#else /* CSMA_CONF_SEND_802154_ACK */
#define CSMA_SEND_802154_ACK 0
#endif /* CSMA_CONF_SEND_802154_ACK */
#define CSMA_ACK_LEN 3
extern const struct mac_driver csma_driver;
const struct mac_driver *csma_init(const struct mac_driver *r);
#endif /* CSMA_H_ */

312
core/net/mac/nullrdc.c
View File

@ -1,312 +0,0 @@
/*
* 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 <string.h>
#if CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64
#include "lib/simEnvChange.h"
#include "sys/cooja_mt.h"
#endif /* CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64 */
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
#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/framer/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 {
#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 = packetbuf_holds_broadcast();
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 || CONTIKI_TARGET_COOJA_IP64
simProcessRunValue = 1;
cooja_mt_yield();
#endif /* CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64 */
}
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 || CONTIKI_TARGET_COOJA_IP64
simProcessRunValue = 1;
cooja_mt_yield();
#endif /* CONTIKI_TARGET_COOJA || CONTIKI_TARGET_COOJA_IP64 */
}
}
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;
}
/*---------------------------------------------------------------------------*/
void
nullrdc_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;
}
}
/*---------------------------------------------------------------------------*/
void
nullrdc_packet_input(void)
{
#if NULLRDC_SEND_802154_ACK
int original_datalen;
uint8_t *original_dataptr;
original_datalen = packetbuf_datalen();
original_dataptr = packetbuf_dataptr();
#endif
#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());
} else if(!linkaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
&linkaddr_node_addr) &&
!packetbuf_holds_broadcast()) {
PRINTF("nullrdc: not for us\n");
} 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_MAC_SEQNO));
} 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_NETWORK.input();
}
}
}
/*---------------------------------------------------------------------------*/

2
drivers/cpu/cc26xx-cc13xx/rf-core/rf-ble.c
View File

@ -295,7 +295,7 @@ PROCESS_THREAD(rf_ble_beacon_process, ev, data)
*
* First, determine our state:
*
* If we are running NullRDC, we are likely in IEEE RX mode. We need to
* If we are running CSMA, we are likely in IEEE RX mode. We need to
* abort the IEEE BG Op before entering BLE mode.
* If we are ContikiMAC, we are likely off, in which case we need to
* boot the CPE before entering BLE mode

2
drivers/dev/cc1200/cc1200-conf.h
View File

@ -76,7 +76,7 @@
/*
* The RX watchdog is used to check whether the radio is in RX mode at regular
* intervals (once per second). Can be used to improve reliability especially
* if NullRDC is used. Turned of by default.
* if CSMA is used. Turned of by default.
*/
#ifdef CC1200_CONF_USE_RX_WATCHDOG
#define CC1200_USE_RX_WATCHDOG CC1200_CONF_USE_RX_WATCHDOG

6
drivers/dev/cc1200/cc1200.c
View File

@ -972,7 +972,7 @@ channel_clear(void)
/*
* Check if the radio driver is currently receiving a packet.
*
* nullrdc uses this function
* CSMA uses this function
* - to detect a collision before transmit()
* - to detect an incoming ACK
*/
@ -991,11 +991,11 @@ receiving_packet(void)
* for this event might make it necessary to review the MAC timing
* parameters! Instead of (or in addition to) using GPIO0 we could also
* read out MODEM_STATUS1 (e.g. PQT reached), but this would not change
* the situation at least for nullrdc as it uses two "blocking" timers
* the situation at least for CSMA as it uses two "blocking" timers
* (does not perform polling...). Therefore the overall timing
* of the ACK handling wouldn't change. It would just allow to detect an
* incoming packet a little bit earlier and help us with respect to
* collision avoidance (why not use channel_clear() in nullrdc
* collision avoidance (why not use channel_clear()
* at this point?).
*/

6
drivers/platform/cc2538dk/contiki-conf.h
View File

@ -254,9 +254,9 @@ typedef uint32_t rtimer_clock_t;
#include "board.h"
/*---------------------------------------------------------------------------*/
/* Configure NullRDC for when it's selected */
#define NULLRDC_802154_AUTOACK 1
#define NULLRDC_802154_AUTOACK_HW 1
/* Configure CSMA for when it's selected */
#define CSMA_802154_AUTOACK 1
#define CSMA_802154_AUTOACK_HW 1
#define NETSTACK_CONF_RADIO cc2538_rf_driver
/** @} */

8
drivers/platform/cooja/contiki-conf.h
View File

@ -67,10 +67,10 @@
/* Default network config */
#if NETSTACK_CONF_WITH_IPV6
#define NULLRDC_CONF_802154_AUTOACK 1
#define NULLRDC_CONF_SEND_802154_ACK 1
#define NULLRDC_CONF_ACK_WAIT_TIME RTIMER_SECOND / 500
#define NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME 0
#define CSMA_CONF_802154_AUTOACK 1
#define CSMA_CONF_SEND_802154_ACK 1
#define CSMA_CONF_ACK_WAIT_TIME RTIMER_SECOND / 500
#define CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME 0
/* Radio setup */
#define NETSTACK_CONF_RADIO cooja_radio_driver

4
drivers/platform/jn516x/contiki-conf.h
View File

@ -97,8 +97,8 @@
#define NETSTACK_CONF_NETWORK sicslowpan_driver
#define UIP_CONF_BROADCAST 1
/* Configure NullRDC for when it is selected */
#define NULLRDC_CONF_802154_AUTOACK_HW 1
/* Configure CSMA for when it is selected */
#define CSMA_CONF_802154_AUTOACK_HW 1
#define RDC_CONF_HARDWARE_ACK 1

6
drivers/platform/openmote-cc2538/contiki-conf.h
View File

@ -308,9 +308,9 @@ typedef uint32_t rtimer_clock_t;
* @{
*/
/* Configure NullRDC for when it's selected */
#define NULLRDC_802154_AUTOACK 1
#define NULLRDC_802154_AUTOACK_HW 1
/* Configure CSMA for when it's selected */
#define CSMA_802154_AUTOACK 1
#define CSMA_802154_AUTOACK_HW 1
#ifndef NETSTACK_CONF_RADIO
#define NETSTACK_CONF_RADIO cc2538_rf_driver

16
drivers/platform/srf06-cc26xx/contiki-conf.h
View File

@ -61,8 +61,8 @@
#define CC2650_FAST_RADIO_STARTUP 0
#endif
/* Configure NullRDC for when it's selected */
#define NULLRDC_CONF_802154_AUTOACK 1
/* Configure CSMA for when it's selected */
#define CSMA_CONF_802154_AUTOACK 1
#ifdef RF_CHANNEL
#define RF_CORE_CONF_CHANNEL RF_CHANNEL
@ -91,10 +91,10 @@
#define RF_CORE_CONF_CHANNEL 0
#endif
#define NULLRDC_CONF_ACK_WAIT_TIME (RTIMER_SECOND / 400)
#define NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME (RTIMER_SECOND / 1000)
#define NULLRDC_CONF_802154_AUTOACK_HW 0
#define NULLRDC_CONF_SEND_802154_ACK 1
#define CSMA_CONF_ACK_WAIT_TIME (RTIMER_SECOND / 400)
#define CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME (RTIMER_SECOND / 1000)
#define CSMA_CONF_802154_AUTOACK_HW 0
#define CSMA_CONF_SEND_802154_ACK 1
#else
#define NETSTACK_CONF_RADIO ieee_mode_driver
@ -103,8 +103,8 @@
#define RF_CORE_CONF_CHANNEL 25
#endif
#define NULLRDC_CONF_802154_AUTOACK_HW 1
#define NULLRDC_CONF_SEND_802154_ACK 0
#define CSMA_CONF_802154_AUTOACK_HW 1
#define CSMA_CONF_SEND_802154_ACK 0
#endif
#define NETSTACK_RADIO_MAX_PAYLOAD_LEN 125

16
drivers/platform/zoul/contiki-conf.h
View File

@ -305,9 +305,9 @@ typedef uint32_t rtimer_clock_t;
*
* @{
*/
/* Configure NullRDC for when it's selected */
#define NULLRDC_CONF_802154_AUTOACK 1
#define NULLRDC_CONF_802154_AUTOACK_HW 1
/* Configure CSMA for when it's selected */
#define CSMA_CONF_802154_AUTOACK 1
#define CSMA_CONF_802154_AUTOACK_HW 1
#if CC1200_CONF_SUBGHZ_50KBPS_MODE
#define NETSTACK_CONF_RADIO cc1200_driver
@ -316,11 +316,11 @@ typedef uint32_t rtimer_clock_t;
#define CC1200_CONF_USE_GPIO2 0
#define CC1200_CONF_USE_RX_WATCHDOG 0
#define NULLRDC_CONF_ACK_WAIT_TIME (RTIMER_SECOND / 200)
#define NULLRDC_CONF_AFTER_ACK_DETECTED_WAIT_TIME (RTIMER_SECOND / 1500)
#define NULLRDC_CONF_802154_AUTOACK 1
#define NULLRDC_CONF_802154_AUTOACK_HW 1
#define NULLRDC_CONF_SEND_802154_ACK 0
#define CSMA_CONF_ACK_WAIT_TIME (RTIMER_SECOND / 200)
#define CSMA_CONF_AFTER_ACK_DETECTED_WAIT_TIME (RTIMER_SECOND / 1500)
#define CSMA_CONF_802154_AUTOACK 1
#define CSMA_CONF_802154_AUTOACK_HW 1
#define CSMA_CONF_SEND_802154_ACK 0
#endif

2
examples/ipv6/json-ws/README-COSM.md
View File

@ -34,7 +34,7 @@ TSP_PREFIX=2001:05c0:1517:e400 (prefixlen is 56).
it with the RPL-border-router (assumes Z1 node).
cd contiki/examples/ipv6/rpl-border-router
make DEFINES=DEFINES=NETSTACK_RDC=nullrdc_driver,NULLRDC_CONF_802154_AUTOACK=1 TARGET=z1 border-router.upload
make DEFINES=DEFINES=NETSTACK_RDC=nullrdc_driver,CSMA_CONF_802154_AUTOACK=1 TARGET=z1 border-router.upload
6. Run tunslip6 which will forward IP from the RPL network to the IPv6 tunnel
(and to the Internet).

4
examples/ipv6/json-ws/project-conf.h
View File

@ -39,8 +39,8 @@
#define JSON_WS_CONF_CALLBACK_PORT 80
#define JSON_WS_CONF_CALLBACK_INTERVAL 120
#undef NULLRDC_CONF_802154_AUTOACK
#define NULLRDC_CONF_802154_AUTOACK 1
#undef CSMA_CONF_802154_AUTOACK
#define CSMA_CONF_802154_AUTOACK 1
/* Reduce code size */
#undef ENERGEST_CONF_ON

2
examples/ipv6/multicast/project-conf.h
View File

@ -46,7 +46,7 @@
/* Change this to switch engines. Engine codes in uip-mcast6-engines.h */
#define UIP_MCAST6_CONF_ENGINE UIP_MCAST6_ENGINE_ROLL_TM
/* For Imin: Use 16 over NullRDC, 64 over Contiki MAC */
/* For Imin: Use 16 over CSMA, 64 over Contiki MAC */
#define ROLL_TM_CONF_IMIN_1 64
#undef UIP_CONF_IPV6_RPL

4
examples/ipv6/rpl-udp/project-conf.h
View File

@ -47,8 +47,8 @@
#define UIP_CONF_MAX_ROUTES 10
#endif /* TEST_MORE_ROUTES */
#undef NULLRDC_CONF_802154_AUTOACK
#define NULLRDC_CONF_802154_AUTOACK 1
#undef CSMA_CONF_802154_AUTOACK
#define CSMA_CONF_802154_AUTOACK 1
/* Define as minutes */
#define RPL_CONF_DEFAULT_LIFETIME_UNIT 60

4
examples/platform-specific/jn516x/rpl/common-conf.h
View File

@ -34,7 +34,7 @@
#ifndef __COMMON_CONF_H__
#define __COMMON_CONF_H__
#define MAC_CONFIG_NULLRDC 0
#define MAC_CONFIG_CSMA 0
#define MAC_CONFIG_TSCH 1
/* Select a MAC configuration */
#define MAC_CONFIG MAC_CONFIG_TSCH
@ -42,7 +42,7 @@
#undef NETSTACK_CONF_MAC
#undef NETSTACK_CONF_FRAMER
#if MAC_CONFIG == MAC_CONFIG_NULLRDC
#if MAC_CONFIG == MAC_CONFIG_CSMA
#elif MAC_CONFIG == MAC_CONFIG_TSCH

2
regression-tests/03-compile-nxp-ports/Makefile
View File

@ -1,7 +1,7 @@
EXAMPLESDIR=../../examples
TOOLSDIR=../../tools
# build jn516x examples, covering IPv6, RPL, CoAP, Rime, Nullrdc, Contikimac
# build jn516x examples, covering IPv6, RPL, CoAP
EXAMPLES = \
hello-world/jn516x \
platform-specific/jn516x/dr1175-sensors/jn516x \

2
regression-tests/08-ipv6/code-slip-radio/project-conf.h
View File

@ -1,7 +1,7 @@
#ifndef __PROJECT_CONF_H__
#define __PROJECT_CONF_H__
#define NULLRDC_CONF_802154_AUTOACK 1
#define CSMA_CONF_802154_AUTOACK 1
#define RPL_CONF_DAO_ACK 1