Added MAC layer framing support to X-MAC so that packets now are standard 802.15.4 frames
This commit is contained in:
adamdunkels
parent
1b26fcd5c7
commit
9ec57d61ad
1 changed files with 192 additions and 127 deletions
|
|
@ -28,7 +28,7 @@
|
|||
*
|
||||
* This file is part of the Contiki operating system.
|
||||
*
|
||||
* $Id: xmac.c,v 1.37 2009/10/19 06:39:29 adamdunkels Exp $
|
||||
* $Id: xmac.c,v 1.38 2009/10/19 20:53:56 adamdunkels Exp $
|
||||
*/
|
||||
|
||||
/**
|
||||
|
|
@ -36,19 +36,21 @@
|
|||
* A simple power saving MAC protocol based on X-MAC [SenSys 2006]
|
||||
* \author
|
||||
* Adam Dunkels <adam@sics.se>
|
||||
* Niclas Finne <nfi@sics.se>
|
||||
* Joakim Eriksson <joakime@sics.se>
|
||||
*/
|
||||
|
||||
#include "sys/pt.h"
|
||||
#include "net/mac/xmac.h"
|
||||
#include "sys/rtimer.h"
|
||||
#include "dev/leds.h"
|
||||
#include "net/rime.h"
|
||||
#include "net/rime/timesynch.h"
|
||||
#include "dev/radio.h"
|
||||
#include "dev/watchdog.h"
|
||||
#include "lib/random.h"
|
||||
|
||||
#include "net/mac/framer.h"
|
||||
#include "net/mac/xmac.h"
|
||||
#include "net/rime.h"
|
||||
#include "net/rime/timesynch.h"
|
||||
#include "sys/compower.h"
|
||||
#include "sys/pt.h"
|
||||
#include "sys/rtimer.h"
|
||||
|
||||
#include "contiki-conf.h"
|
||||
|
||||
|
|
@ -80,21 +82,23 @@ struct announcement_msg {
|
|||
"num" field in the struct. */
|
||||
#define ANNOUNCEMENT_MSG_HEADERLEN (sizeof (uint16_t))
|
||||
|
||||
#define TYPE_STROBE 0
|
||||
#define TYPE_DATA 1
|
||||
#define TYPE_ANNOUNCEMENT 2
|
||||
#define TYPE_STROBE_ACK 3
|
||||
#define DISPATCH 0
|
||||
#define TYPE_STROBE 0x10
|
||||
/* #define TYPE_DATA 0x11 */
|
||||
#define TYPE_ANNOUNCEMENT 0x12
|
||||
#define TYPE_STROBE_ACK 0x13
|
||||
|
||||
struct xmac_hdr {
|
||||
uint16_t type;
|
||||
rimeaddr_t sender;
|
||||
rimeaddr_t receiver;
|
||||
uint8_t dispatch;
|
||||
uint8_t type;
|
||||
};
|
||||
|
||||
#define MAX_STROBE_SIZE 40
|
||||
|
||||
#ifdef XMAC_CONF_ON_TIME
|
||||
#define DEFAULT_ON_TIME (XMAC_CONF_ON_TIME)
|
||||
#else
|
||||
#define DEFAULT_ON_TIME (RTIMER_ARCH_SECOND / 200)
|
||||
#define DEFAULT_ON_TIME (RTIMER_ARCH_SECOND / 160)
|
||||
#endif
|
||||
|
||||
#ifdef XMAC_CONF_OFF_TIME
|
||||
|
|
@ -154,6 +158,7 @@ static const struct radio_driver *radio;
|
|||
#if DEBUG
|
||||
#include <stdio.h>
|
||||
#define PRINTF(...) printf(__VA_ARGS__)
|
||||
#define PRINTDEBUG(...) printf(__VA_ARGS__)
|
||||
#else
|
||||
#undef LEDS_ON
|
||||
#undef LEDS_OFF
|
||||
|
|
@ -162,6 +167,7 @@ static const struct radio_driver *radio;
|
|||
#define LEDS_OFF(x)
|
||||
#define LEDS_TOGGLE(x)
|
||||
#define PRINTF(...)
|
||||
#define PRINTDEBUG(...)
|
||||
#endif
|
||||
|
||||
#if XMAC_CONF_ANNOUNCEMENTS
|
||||
|
|
@ -251,7 +257,7 @@ powercycle(struct rtimer *t, void *ptr)
|
|||
#endif /* XMAC_CONF_COMPOWER */
|
||||
} else {
|
||||
waiting_for_packet++;
|
||||
if(waiting_for_packet >= 2) {
|
||||
if(waiting_for_packet > 2) {
|
||||
/* We should not be awake for more than two consecutive
|
||||
power cycles without having heard a packet, so we turn off
|
||||
the radio. */
|
||||
|
|
@ -317,7 +323,7 @@ powercycle(struct rtimer *t, void *ptr)
|
|||
/*---------------------------------------------------------------------------*/
|
||||
#if XMAC_CONF_ANNOUNCEMENTS
|
||||
static int
|
||||
parse_announcements(rimeaddr_t *from)
|
||||
parse_announcements(const rimeaddr_t *from)
|
||||
{
|
||||
/* Parse incoming announcements */
|
||||
struct announcement_msg *adata = packetbuf_dataptr();
|
||||
|
|
@ -383,7 +389,7 @@ remove_encounter(void *encounter)
|
|||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
static void
|
||||
register_encounter(rimeaddr_t *neighbor, rtimer_clock_t time)
|
||||
register_encounter(const rimeaddr_t *neighbor, rtimer_clock_t time)
|
||||
{
|
||||
struct encounter *e;
|
||||
|
||||
|
|
@ -395,7 +401,7 @@ register_encounter(rimeaddr_t *neighbor, rtimer_clock_t time)
|
|||
break;
|
||||
}
|
||||
}
|
||||
/* No matchin encounter was found, so we allocate a new one. */
|
||||
/* No matching encounter was found, so we allocate a new one. */
|
||||
if(e == NULL) {
|
||||
e = memb_alloc(&encounter_memb);
|
||||
if(e == NULL) {
|
||||
|
|
@ -415,17 +421,16 @@ send_packet(void)
|
|||
{
|
||||
rtimer_clock_t t0;
|
||||
rtimer_clock_t t;
|
||||
rtimer_clock_t encounter_time;
|
||||
rtimer_clock_t encounter_time = 0;
|
||||
int strobes;
|
||||
struct xmac_hdr hdr;
|
||||
struct xmac_hdr *hdr;
|
||||
int got_strobe_ack = 0;
|
||||
struct {
|
||||
struct xmac_hdr hdr;
|
||||
struct announcement_msg announcement;
|
||||
} strobe;
|
||||
int len;
|
||||
uint8_t strobe[MAX_STROBE_SIZE];
|
||||
int strobe_len, len;
|
||||
int is_broadcast = 0;
|
||||
int is_reliable;
|
||||
struct encounter *e;
|
||||
struct queuebuf *packet;
|
||||
|
||||
#if WITH_RANDOM_WAIT_BEFORE_SEND
|
||||
{
|
||||
|
|
@ -434,6 +439,50 @@ send_packet(void)
|
|||
}
|
||||
#endif /* WITH_RANDOM_WAIT_BEFORE_SEND */
|
||||
|
||||
/* Create the X-MAC header for the data packet. */
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
|
||||
if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), &rimeaddr_null)) {
|
||||
is_broadcast = 1;
|
||||
PRINTDEBUG("xmac: send broadcast\n");
|
||||
} else {
|
||||
#if UIP_CONF_IPV6
|
||||
PRINTDEBUG("xmac: send unicast to %02x%02x:%02x%02x:%02x%02x:%02x%02x\n",
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[1],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[2],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[3],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[4],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[5],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[6],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[7]);
|
||||
#else
|
||||
PRINTDEBUG("xmac: send unicast to %u.%u\n",
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[0],
|
||||
packetbuf_addr(PACKETBUF_ADDR_RECEIVER)->u8[1]);
|
||||
#endif /* UIP_CONF_IPV6 */
|
||||
}
|
||||
is_reliable = packetbuf_attr(PACKETBUF_ATTR_RELIABLE) ||
|
||||
packetbuf_attr(PACKETBUF_ATTR_ERELIABLE);
|
||||
len = framer_get()->create();
|
||||
strobe_len = len + sizeof(struct xmac_hdr);
|
||||
if(len == 0 || strobe_len > sizeof(strobe)) {
|
||||
/* Failed to send */
|
||||
PRINTF("xmac: send failed, too large header\n");
|
||||
return 0;
|
||||
}
|
||||
memcpy(strobe, packetbuf_hdrptr(), len);
|
||||
strobe[len] = DISPATCH; /* dispatch */
|
||||
strobe[len + 1] = TYPE_STROBE; /* type */
|
||||
|
||||
packetbuf_compact();
|
||||
packet = queuebuf_new_from_packetbuf();
|
||||
if(packet == NULL) {
|
||||
/* No buffer available */
|
||||
PRINTF("xmac: send failed, no queue buffer available (of %u)\n",
|
||||
QUEUEBUF_CONF_NUM);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
#if WITH_CHANNEL_CHECK
|
||||
/* Check if there are other strobes in the air. */
|
||||
|
|
@ -488,7 +537,6 @@ send_packet(void)
|
|||
receiver will already be awake. */
|
||||
while(RTIMER_CLOCK_LT(RTIMER_NOW(), expected));
|
||||
}
|
||||
|
||||
#else /* WITH_ACK_OPTIMIZATION */
|
||||
/* Wait until the receiver is expected to be awake */
|
||||
while(RTIMER_CLOCK_LT(RTIMER_NOW(), expected));
|
||||
|
|
@ -497,22 +545,6 @@ send_packet(void)
|
|||
}
|
||||
#endif /* WITH_ENCOUNTER_OPTIMIZATION */
|
||||
|
||||
/* Create the X-MAC header for the data packet. We cannot do this
|
||||
in-place in the packet buffer, because we cannot be sure of the
|
||||
alignment of the header in the packet buffer. */
|
||||
hdr.type = TYPE_DATA;
|
||||
rimeaddr_copy(&hdr.sender, &rimeaddr_node_addr);
|
||||
rimeaddr_copy(&hdr.receiver, packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
||||
if(rimeaddr_cmp(&hdr.receiver, &rimeaddr_null)) {
|
||||
is_broadcast = 1;
|
||||
}
|
||||
|
||||
/* Copy the X-MAC header to the header portion of the packet
|
||||
buffer. */
|
||||
packetbuf_hdralloc(sizeof(struct xmac_hdr));
|
||||
memcpy(packetbuf_hdrptr(), &hdr, sizeof(struct xmac_hdr));
|
||||
packetbuf_compact();
|
||||
|
||||
t0 = RTIMER_NOW();
|
||||
strobes = 0;
|
||||
|
||||
|
|
@ -534,27 +566,45 @@ send_packet(void)
|
|||
|
||||
t = RTIMER_NOW();
|
||||
|
||||
strobe.hdr.type = TYPE_STROBE;
|
||||
rimeaddr_copy(&strobe.hdr.sender, &rimeaddr_node_addr);
|
||||
rimeaddr_copy(&strobe.hdr.receiver, packetbuf_addr(PACKETBUF_ADDR_RECEIVER));
|
||||
|
||||
/* Send the strobe packet. */
|
||||
radio->send((const uint8_t *)&strobe, sizeof(struct xmac_hdr));
|
||||
radio->send(strobe, strobe_len);
|
||||
|
||||
while(got_strobe_ack == 0 &&
|
||||
RTIMER_CLOCK_LT(RTIMER_NOW(), t + xmac_config.strobe_wait_time)) {
|
||||
/* See if we got an ACK */
|
||||
if(!is_broadcast) {
|
||||
len = radio->read((uint8_t *)&strobe, sizeof(struct xmac_hdr));
|
||||
packetbuf_clear();
|
||||
len = radio->read(packetbuf_dataptr(), PACKETBUF_SIZE);
|
||||
if(len > 0) {
|
||||
if(rimeaddr_cmp(&strobe.hdr.sender, &rimeaddr_node_addr) &&
|
||||
rimeaddr_cmp(&strobe.hdr.receiver, &rimeaddr_node_addr)) {
|
||||
/* We got an ACK from the receiver, so we can immediately send
|
||||
the packet. */
|
||||
got_strobe_ack = 1;
|
||||
encounter_time = RTIMER_NOW();
|
||||
}
|
||||
}
|
||||
packetbuf_set_datalen(len);
|
||||
if(framer_get()->parse()) {
|
||||
hdr = packetbuf_dataptr();
|
||||
|
||||
if(hdr->dispatch == DISPATCH && hdr->type == TYPE_STROBE_ACK) {
|
||||
if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
|
||||
&rimeaddr_node_addr)) {
|
||||
/* We got an ACK from the receiver, so we can immediately send
|
||||
the packet. */
|
||||
got_strobe_ack = 1;
|
||||
encounter_time = RTIMER_NOW();
|
||||
} else {
|
||||
PRINTDEBUG("xmac: strobe ack for someone else\n");
|
||||
}
|
||||
} else {
|
||||
/* TODO One of the nodes should back-off since several
|
||||
nodes are sending at once. If possible and if the
|
||||
packet is destined for this node: send a strobe ack
|
||||
if it is a strobe packet, queue the packet if it is a
|
||||
data packet? */
|
||||
PRINTDEBUG("xmac: ignored data %u\n", len);
|
||||
#if DEBUG
|
||||
/* collisions++;*/
|
||||
#endif /* DEBUG */
|
||||
}
|
||||
} else {
|
||||
PRINTF("xmac: send failed to parse %u\n", len);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -587,6 +637,10 @@ send_packet(void)
|
|||
keep it on() for a while. */
|
||||
}
|
||||
|
||||
/* restore the packet to send */
|
||||
queuebuf_to_packetbuf(packet);
|
||||
queuebuf_free(packet);
|
||||
|
||||
/* Send the data packet. */
|
||||
if(is_broadcast || got_strobe_ack) {
|
||||
radio->send(packetbuf_hdrptr(), packetbuf_totlen());
|
||||
|
|
@ -594,7 +648,7 @@ send_packet(void)
|
|||
|
||||
#if WITH_ENCOUNTER_OPTIMIZATION
|
||||
if(got_strobe_ack) {
|
||||
register_encounter(&hdr.receiver, encounter_time);
|
||||
register_encounter(packetbuf_addr(PACKETBUF_ADDR_RECEIVER), encounter_time);
|
||||
}
|
||||
#endif /* WITH_ENCOUNTER_OPTIMIZATION */
|
||||
watchdog_start();
|
||||
|
|
@ -667,74 +721,29 @@ read_packet(void)
|
|||
packetbuf_clear();
|
||||
|
||||
len = radio->read(packetbuf_dataptr(), PACKETBUF_SIZE);
|
||||
|
||||
if(len > 0) {
|
||||
packetbuf_set_datalen(len);
|
||||
if(len == 0) {
|
||||
return 0;
|
||||
}
|
||||
|
||||
packetbuf_set_datalen(len);
|
||||
|
||||
if(framer_get()->parse()) {
|
||||
hdr = packetbuf_dataptr();
|
||||
|
||||
packetbuf_hdrreduce(sizeof(struct xmac_hdr));
|
||||
|
||||
if(hdr->type == TYPE_STROBE) {
|
||||
/* There is no data in the packet so it has to be a strobe. */
|
||||
someone_is_sending = 2;
|
||||
if(hdr->dispatch != DISPATCH) {
|
||||
|
||||
if(rimeaddr_cmp(&hdr->receiver, &rimeaddr_node_addr)) {
|
||||
/* This is a strobe packet for us. */
|
||||
|
||||
if(rimeaddr_cmp(&hdr->sender, &rimeaddr_node_addr)) {
|
||||
/* If the sender address is our node address, the strobe is
|
||||
a stray strobe ACK to us, which we ignore unless we are
|
||||
currently sending a packet. */
|
||||
someone_is_sending = 0;
|
||||
} else {
|
||||
struct xmac_hdr msg;
|
||||
/* If the sender address is someone else, we should
|
||||
acknowledge the strobe and wait for the packet. By using
|
||||
the same address as both sender and receiver, we flag the
|
||||
message is a strobe ack. */
|
||||
msg.type = TYPE_STROBE_ACK;
|
||||
rimeaddr_copy(&msg.receiver, &hdr->sender);
|
||||
rimeaddr_copy(&msg.sender, &hdr->sender);
|
||||
/* We turn on the radio in anticipation of the incoming
|
||||
packet. */
|
||||
someone_is_sending = 1;
|
||||
waiting_for_packet = 1;
|
||||
on();
|
||||
radio->send((const uint8_t *)&msg, sizeof(struct xmac_hdr));
|
||||
}
|
||||
} else if(rimeaddr_cmp(&hdr->receiver, &rimeaddr_null)) {
|
||||
/* If the receiver address is null, the strobe is sent to
|
||||
prepare for an incoming broadcast packet. If this is the
|
||||
case, we turn on the radio and wait for the incoming
|
||||
broadcast packet. */
|
||||
waiting_for_packet = 1;
|
||||
on();
|
||||
}
|
||||
|
||||
/* Check for annoucements in the strobe */
|
||||
/* if(packetbuf_datalen() > 0) {
|
||||
parse_announcements(&hdr->sender);
|
||||
}*/
|
||||
/* We are done processing the strobe and we therefore return
|
||||
to the caller. */
|
||||
return RIME_OK;
|
||||
} else if(hdr->type == TYPE_DATA) {
|
||||
someone_is_sending = 0;
|
||||
if(rimeaddr_cmp(&hdr->receiver, &rimeaddr_node_addr) ||
|
||||
rimeaddr_cmp(&hdr->receiver, &rimeaddr_null)) {
|
||||
if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
|
||||
&rimeaddr_node_addr) ||
|
||||
rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
|
||||
&rimeaddr_null)) {
|
||||
/* This is a regular packet that is destined to us or to the
|
||||
broadcast address. */
|
||||
|
||||
|
||||
/* We have received the final packet, so we can go back to being
|
||||
asleep. */
|
||||
off();
|
||||
|
||||
/* Set sender and receiver packet attributes */
|
||||
if(!rimeaddr_cmp(&hdr->receiver, &rimeaddr_null)) {
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, &hdr->receiver);
|
||||
}
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &hdr->sender);
|
||||
|
||||
#if XMAC_CONF_COMPOWER
|
||||
/* Accumulate the power consumption for the packet reception. */
|
||||
compower_accumulate(¤t_packet);
|
||||
|
|
@ -743,27 +752,81 @@ read_packet(void)
|
|||
keep track of the amount of energy spent on receiving the
|
||||
packet. */
|
||||
compower_attrconv(¤t_packet);
|
||||
|
||||
|
||||
/* Clear the accumulated power consumption so that it is ready
|
||||
for the next packet. */
|
||||
compower_clear(¤t_packet);
|
||||
#endif /* XMAC_CONF_COMPOWER */
|
||||
|
||||
|
||||
waiting_for_packet = 0;
|
||||
|
||||
|
||||
/* XXX should set timer to send queued packet later. */
|
||||
if(queued_packet != NULL) {
|
||||
queuebuf_free(queued_packet);
|
||||
queued_packet = NULL;
|
||||
}
|
||||
|
||||
return packetbuf_totlen();
|
||||
|
||||
PRINTDEBUG("xmac: data(%u)\n", packetbuf_datalen());
|
||||
return packetbuf_datalen();
|
||||
} else {
|
||||
PRINTDEBUG("xmac: data not for us\n");
|
||||
}
|
||||
|
||||
} else if(hdr->type == TYPE_STROBE) {
|
||||
someone_is_sending = 2;
|
||||
|
||||
if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
|
||||
&rimeaddr_node_addr)) {
|
||||
/* This is a strobe packet for us. */
|
||||
|
||||
/* If the sender address is someone else, we should
|
||||
acknowledge the strobe and wait for the packet. By using
|
||||
the same address as both sender and receiver, we flag the
|
||||
message is a strobe ack. */
|
||||
hdr->type = TYPE_STROBE_ACK;
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER,
|
||||
packetbuf_addr(PACKETBUF_ADDR_SENDER));
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
|
||||
packetbuf_compact();
|
||||
if(framer_get()->create()) {
|
||||
/* We turn on the radio in anticipation of the incoming
|
||||
packet. */
|
||||
someone_is_sending = 1;
|
||||
waiting_for_packet = 1;
|
||||
on();
|
||||
radio->send(packetbuf_hdrptr(), packetbuf_totlen());
|
||||
PRINTDEBUG("xmac: send strobe ack %u\n", packetbuf_totlen());
|
||||
} else {
|
||||
PRINTF("xmac: failed to send strobe ack\n");
|
||||
}
|
||||
} else if(rimeaddr_cmp(packetbuf_addr(PACKETBUF_ADDR_RECEIVER),
|
||||
&rimeaddr_null)) {
|
||||
/* If the receiver address is null, the strobe is sent to
|
||||
prepare for an incoming broadcast packet. If this is the
|
||||
case, we turn on the radio and wait for the incoming
|
||||
broadcast packet. */
|
||||
waiting_for_packet = 1;
|
||||
on();
|
||||
} else {
|
||||
PRINTDEBUG("xmac: strobe not for us\n");
|
||||
}
|
||||
|
||||
/* We are done processing the strobe and we therefore return
|
||||
to the caller. */
|
||||
return RIME_OK;
|
||||
#if XMAC_CONF_ANNOUNCEMENTS
|
||||
} else if(hdr->type == TYPE_ANNOUNCEMENT) {
|
||||
parse_announcements(&hdr->sender);
|
||||
packetbuf_hdrreduce(sizeof(struct xmac_hdr));
|
||||
parse_announcements(packetbuf_addr(PACKETBUF_ADDR_SENDER));
|
||||
#endif /* XMAC_CONF_ANNOUNCEMENTS */
|
||||
} else if(hdr->type == TYPE_STROBE_ACK) {
|
||||
PRINTDEBUG("xmac: stray strobe ack\n");
|
||||
} else {
|
||||
PRINTF("xmac: unknown type %u (%u/%u)\n", hdr->type,
|
||||
packetbuf_datalen(), len);
|
||||
}
|
||||
} else {
|
||||
PRINTF("xmac: failed to parse (%u)\n", packetbuf_totlen());
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -777,20 +840,22 @@ send_announcement(void *ptr)
|
|||
|
||||
/* Set up the probe header. */
|
||||
packetbuf_clear();
|
||||
packetbuf_set_datalen(sizeof(struct xmac_hdr));
|
||||
hdr = packetbuf_dataptr();
|
||||
hdr->type = TYPE_ANNOUNCEMENT;
|
||||
rimeaddr_copy(&hdr->sender, &rimeaddr_node_addr);
|
||||
rimeaddr_copy(&hdr->receiver, &rimeaddr_null);
|
||||
|
||||
announcement_len = format_announcement((char *)hdr +
|
||||
sizeof(struct xmac_hdr));
|
||||
|
||||
if(announcement_len > 0) {
|
||||
packetbuf_set_datalen(sizeof(struct xmac_hdr) + announcement_len);
|
||||
hdr->dispatch = DISPATCH;
|
||||
hdr->type = TYPE_ANNOUNCEMENT;
|
||||
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &rimeaddr_node_addr);
|
||||
packetbuf_set_addr(PACKETBUF_ADDR_RECEIVER, &rimeaddr_null);
|
||||
packetbuf_set_attr(PACKETBUF_ATTR_RADIO_TXPOWER, announcement_radio_txpower);
|
||||
radio->send(packetbuf_hdrptr(), packetbuf_totlen());
|
||||
if(framer_get()->create()) {
|
||||
radio->send(packetbuf_hdrptr(), packetbuf_totlen());
|
||||
}
|
||||
}
|
||||
}
|
||||
/*---------------------------------------------------------------------------*/
|
||||
|
|
|
|||
Loading…
Reference in a new issue