giomba
/
nes-proj
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Merge branch 'develop' into contrib/traceroute

This commit is contained in:
Simon Duquennoy 2017-11-17 17:26:17 +01:00 committed by GitHub
parent 0bd107b0a0 2c88ee2807
commit 83fb4b68b5
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
17 changed files with 145 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/cpu/cc2538/lpm.c
View File

@ -212,10 +212,14 @@ lpm_exit()
/* Restore system clock to the 32 MHz XOSC */
select_32_mhz_xosc();
if((REG(SYS_CTRL_PMCTL) & SYS_CTRL_PMCTL_PM3) == SYS_CTRL_PMCTL_PM1) {
ENERGEST_SWITCH(ENERGEST_TYPE_LPM, ENERGEST_TYPE_CPU);
} else {
ENERGEST_SWITCH(ENERGEST_TYPE_DEEP_LPM, ENERGEST_TYPE_CPU);
}
/* Restore PMCTL to PM0 for next pass */
REG(SYS_CTRL_PMCTL) = SYS_CTRL_PMCTL_PM0;
ENERGEST_SWITCH(ENERGEST_TYPE_LPM, ENERGEST_TYPE_CPU);
}
/*---------------------------------------------------------------------------*/
void
@ -286,8 +290,6 @@ lpm_enter()
REG(SYS_CTRL_PMCTL) = SYS_CTRL_PMCTL_PM1;
}
ENERGEST_SWITCH(ENERGEST_TYPE_CPU, ENERGEST_TYPE_LPM);
/* Remember the current time so we can keep stats when we wake up */
if(LPM_CONF_STATS) {
sleep_enter_time = RTIMER_NOW();
@ -310,9 +312,13 @@ lpm_enter()
REG(SYS_CTRL_PMCTL) = SYS_CTRL_PMCTL_PM0;
ENERGEST_SWITCH(ENERGEST_TYPE_LPM, ENERGEST_TYPE_CPU);
} else {
/* All clear. Assert WFI and drop to PM1/2. This is now un-interruptible */
if((REG(SYS_CTRL_PMCTL) & SYS_CTRL_PMCTL_PM3) == SYS_CTRL_PMCTL_PM1) {
ENERGEST_SWITCH(ENERGEST_TYPE_CPU, ENERGEST_TYPE_LPM);
} else {
ENERGEST_SWITCH(ENERGEST_TYPE_CPU, ENERGEST_TYPE_DEEP_LPM);
}
assert_wfi();
}

4
arch/cpu/cc26xx-cc13xx/lpm.c
View File

@ -185,7 +185,7 @@ wake_up(void)
{
lpm_registered_module_t *module;
ENERGEST_SWITCH(ENERGEST_TYPE_LPM, ENERGEST_TYPE_CPU);
ENERGEST_SWITCH(ENERGEST_TYPE_DEEP_LPM, ENERGEST_TYPE_CPU);
/* Sync so that we get the latest values before adjusting recharge settings */
ti_lib_sys_ctrl_aon_sync();
@ -485,7 +485,7 @@ deep_sleep(void)
ti_lib_pwr_ctrl_source_set(PWRCTRL_PWRSRC_ULDO);
}
ENERGEST_SWITCH(ENERGEST_TYPE_CPU, ENERGEST_TYPE_LPM);
ENERGEST_SWITCH(ENERGEST_TYPE_CPU, ENERGEST_TYPE_DEEP_LPM);
/* Sync the AON interface to ensure all writes have gone through. */
ti_lib_sys_ctrl_aon_sync();

2
arch/platform/cooja/contiki-conf.h
View File

@ -87,8 +87,6 @@
#define NBR_TABLE_CONF_MAX_NEIGHBORS 300
#endif /* NBR_TABLE_CONF_MAX_NEIGHBORS */
#define TCPIP_CONF_ANNOTATE_TRANSMISSIONS 1
#ifndef UIP_CONF_IPV6_QUEUE_PKT
#define UIP_CONF_IPV6_QUEUE_PKT 1
#endif /* UIP_CONF_IPV6_QUEUE_PKT */

2
examples/6tisch/etsi-plugtest-2017/project-conf.h
View File

@ -121,6 +121,4 @@
#define LOG_CONF_LEVEL_6TOP LOG_LEVEL_DBG
#define TSCH_LOG_CONF_PER_SLOT 1
#define TCPIP_CONF_ANNOTATE_TRANSMISSIONS 0
#endif /* __PROJECT_CONF_H__ */

18
os/dev/leds.c
View File

@ -33,19 +33,11 @@
#include "dev/leds.h"
#include "sys/clock.h"
static unsigned char leds;
/*---------------------------------------------------------------------------*/
static inline void
show_leds(unsigned char new_leds)
{
leds_arch_set(new_leds);
}
/*---------------------------------------------------------------------------*/
void
leds_init(void)
{
leds_arch_init();
leds = 0;
}
/*---------------------------------------------------------------------------*/
void
@ -53,7 +45,7 @@ leds_blink(void)
{
/* Blink all leds that were initially off. */
unsigned char blink;
blink = ~leds;
blink = ~leds_arch_get();
leds_toggle(blink);
clock_delay(400);
@ -69,24 +61,24 @@ leds_get(void) {
void
leds_set(unsigned char ledv)
{
show_leds(ledv);
leds_arch_set(ledv);
}
/*---------------------------------------------------------------------------*/
void
leds_on(unsigned char ledv)
{
show_leds(leds | ledv);
leds_arch_set(leds_arch_get() | ledv);
}
/*---------------------------------------------------------------------------*/
void
leds_off(unsigned char ledv)
{
show_leds(leds & ~ledv);
leds_arch_set(leds_arch_get() & ~ledv);
}
/*---------------------------------------------------------------------------*/
void
leds_toggle(unsigned char ledv)
{
show_leds(leds ^ ledv);
leds_arch_set(leds_arch_get() ^ ledv);
}
/*---------------------------------------------------------------------------*/

11
os/net/ipv6/sicslowpan.c
View File

@ -1504,6 +1504,17 @@ output(const linkaddr_t *localdest)
set_packet_attrs();
}
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
{
uint8_t traffic_class = (UIP_IP_BUF->vtc << 4) | (UIP_IP_BUF->tcflow >> 4);
if(traffic_class & UIP_TC_MAC_TRANSMISSION_COUNTER_BIT) {
uint8_t max_mac_transmissions = traffic_class & UIP_TC_MAC_TRANSMISSION_COUNTER_MASK;
/* propagate the MAC transmission limit to lower layers */
packetbuf_set_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS, max_mac_transmissions);
}
}
#endif /* UIP_WITH_VARIABLE_RETRANSMISSIONS */
/*
* The destination address will be tagged to each outbound
* packet. If the argument localdest is NULL, we are sending a

19
os/net/ipv6/uip.h
View File

@ -820,6 +820,18 @@ CCIF void uip_send(const void *data, int len);
*/
#define uip_mss() (uip_conn->mss)
/**
* Set the maximal number of MAC transmissions.
*
* \hideinitializer
*/
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
#define uip_set_max_mac_transmissions(conn, value) ((conn)->max_mac_transmissions = (value))
#else
#define uip_set_max_mac_transmissions(conn, value)
#endif
/**
* Set up a new UDP connection.
*
@ -883,6 +895,7 @@ struct uip_udp_conn *uip_udp_new(const uip_ipaddr_t *ripaddr, uint16_t rport);
*/
#define uip_udp_send(len) uip_send((char *)uip_appdata, len)
/** @} */
/* uIP convenience and converting functions. */
@ -1352,6 +1365,9 @@ struct uip_conn {
uint8_t timer; /**< The retransmission timer. */
uint8_t nrtx; /**< The number of retransmissions for the last
segment sent. */
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
uint8_t max_mac_transmissions; /**< Number of max MAC-layer transmissions. */
#endif
uip_tcp_appstate_t appstate; /** The application state. */
};
@ -1389,6 +1405,9 @@ struct uip_udp_conn {
uint16_t lport; /**< The local port number in network byte order. */
uint16_t rport; /**< The remote port number in network byte order. */
uint8_t ttl; /**< Default time-to-live. */
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
uint8_t max_mac_transmissions; /**< Number of max MAC-layer transmissions. */
#endif
/** The application state. */
uip_udp_appstate_t appstate;

28
os/net/ipv6/uip6.c
View File

@ -508,6 +508,9 @@ uip_connect(const uip_ipaddr_t *ripaddr, uint16_t rport)
conn->rto = UIP_RTO;
conn->sa = 0;
conn->sv = 16; /* Initial value of the RTT variance. */
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
conn->max_mac_transmissions = UIP_MAX_MAC_TRANSMISSIONS_UNDEFINED;
#endif
conn->lport = uip_htons(lastport);
conn->rport = rport;
uip_ipaddr_copy(&conn->ripaddr, ripaddr);
@ -581,6 +584,9 @@ uip_udp_new(const uip_ipaddr_t *ripaddr, uint16_t rport)
uip_ipaddr_copy(&conn->ripaddr, ripaddr);
}
conn->ttl = uip_ds6_if.cur_hop_limit;
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
conn->max_mac_transmissions = UIP_MAX_MAC_TRANSMISSIONS_UNDEFINED;
#endif
return conn;
}
@ -1570,6 +1576,16 @@ uip_process(uint8_t flag)
UIP_IP_BUF->len[0] = ((uip_len - UIP_IPH_LEN) >> 8);
UIP_IP_BUF->len[1] = ((uip_len - UIP_IPH_LEN) & 0xff);
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0x00;
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
if(uip_udp_conn->max_mac_transmissions != UIP_MAX_MAC_TRANSMISSIONS_UNDEFINED) {
/* Encapsulate the MAC transmission limit in the Traffic Class field */
UIP_IP_BUF->vtc = 0x60 | (UIP_TC_MAC_TRANSMISSION_COUNTER_BIT >> 4);
UIP_IP_BUF->tcflow = uip_udp_conn->max_mac_transmissions << 4;
}
#endif /* UIP_WITH_VARIABLE_RETRANSMISSIONS */
UIP_IP_BUF->ttl = uip_udp_conn->ttl;
UIP_IP_BUF->proto = UIP_PROTO_UDP;
@ -2274,6 +2290,16 @@ uip_process(uint8_t flag)
UIP_TCP_BUF->srcport = uip_connr->lport;
UIP_TCP_BUF->destport = uip_connr->rport;
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0x00;
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
if(uip_connr->max_mac_transmissions != UIP_MAX_MAC_TRANSMISSIONS_UNDEFINED) {
/* Encapsulate the MAC transmission limit in the Traffic Class field */
UIP_IP_BUF->vtc = 0x60 | (UIP_TC_MAC_TRANSMISSION_COUNTER_BIT >> 4);
UIP_IP_BUF->tcflow = uip_connr->max_mac_transmissions << 4;
}
#endif /* UIP_WITH_VARIABLE_RETRANSMISSIONS */
uip_ipaddr_copy(&UIP_IP_BUF->destipaddr, &uip_connr->ripaddr);
uip_ds6_select_src(&UIP_IP_BUF->srcipaddr, &UIP_IP_BUF->destipaddr);
LOG_INFO("Sending TCP packet to ");
@ -2309,8 +2335,6 @@ uip_process(uint8_t flag)
#if UIP_UDP
ip_send_nolen:
#endif
UIP_IP_BUF->vtc = 0x60;
UIP_IP_BUF->tcflow = 0x00;
UIP_IP_BUF->flow = 0x00;
send:
LOG_INFO("Sending packet with length %d (%d)\n", uip_len,

29
os/net/ipv6/uipopt.h
View File

@ -518,6 +518,35 @@ void uip_log(char *msg);
#define UIP_DEFAULT_PREFIX_LEN 64
/**
* Enables selection of maximal MAC-layer transmission count at application layer
*/
#ifdef UIP_CONF_WITH_VARIABLE_RETRANSMISSIONS
#define UIP_WITH_VARIABLE_RETRANSMISSIONS UIP_CONF_WITH_VARIABLE_RETRANSMISSIONS
#else
#define UIP_WITH_VARIABLE_RETRANSMISSIONS 0
#endif
/**
* This is the default value of MAC-layer transmissons for uIPv6
*
* It means that the limit is selected by the MAC protocol instead of uIPv6.
*/
#define UIP_MAX_MAC_TRANSMISSIONS_UNDEFINED 0
/**
* The MAC-layer transmissons limit is encapslated in "Traffic Class" field
*
* In Contiki, if the Traffic Class field in the IPv6 header has this bit set,
* the low-order bits are used as the MAC-layer transmissons limit.
*/
#define UIP_TC_MAC_TRANSMISSION_COUNTER_BIT 0x40
/**
* The bits in the "Traffic Class" field that describe the MAC transmission limit
*/
#define UIP_TC_MAC_TRANSMISSION_COUNTER_MASK 0x3F
/** @} */
/*------------------------------------------------------------------------------*/

14
os/net/mac/csma/csma-output.c
View File

@ -85,9 +85,9 @@
/* 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
#define CSMA_MAX_FRAME_RETRIES CSMA_MAX_FRAME_RETRIES
#else
#define CSMA_MAX_MAX_FRAME_RETRIES 7
#define CSMA_MAX_FRAME_RETRIES 7
#endif
/* Packet metadata */
@ -506,7 +506,15 @@ csma_output_packet(mac_callback_t sent, void *ptr)
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;
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
metadata->max_transmissions = packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS);
if(metadata->max_transmissions == 0) {
/* If not set by the application, use the default CSMA value */
metadata->max_transmissions = CSMA_MAX_FRAME_RETRIES + 1;
}
#else
metadata->max_transmissions = CSMA_MAX_FRAME_RETRIES + 1;
#endif
metadata->sent = sent;
metadata->cptr = ptr;
list_add(n->packet_queue, q);

6
os/net/mac/tsch/tsch-queue.c
View File

@ -230,7 +230,8 @@ tsch_queue_remove_nbr(struct tsch_neighbor *n)
/*---------------------------------------------------------------------------*/
/* Add packet to neighbor queue. Use same lockfree implementation as ringbuf.c (put is atomic) */
struct tsch_packet *
tsch_queue_add_packet(const linkaddr_t *addr, mac_callback_t sent, void *ptr)
tsch_queue_add_packet(const linkaddr_t *addr, uint8_t max_transmissions,
mac_callback_t sent, void *ptr)
{
struct tsch_neighbor *n = NULL;
int16_t put_index = -1;
@ -252,6 +253,7 @@ tsch_queue_add_packet(const linkaddr_t *addr, mac_callback_t sent, void *ptr)
p->ptr = ptr;
p->ret = MAC_TX_DEFERRED;
p->transmissions = 0;
p->max_transmissions = max_transmissions;
/* Add to ringbuf (actual add committed through atomic operation) */
n->tx_array[put_index] = p;
ringbufindex_put(&n->tx_ringbuf);
@ -342,7 +344,7 @@ tsch_queue_packet_sent(struct tsch_neighbor *n, struct tsch_packet *p,
}
} else {
/* Failed transmission */
if(p->transmissions >= TSCH_MAC_MAX_FRAME_RETRIES + 1) {
if(p->transmissions >= p->max_transmissions) {
/* Drop packet */
tsch_queue_remove_packet_from_queue(n);
in_queue = 0;

4
os/net/mac/tsch/tsch-queue.h
View File

@ -135,6 +135,7 @@ struct tsch_packet {
mac_callback_t sent; /* callback for this packet */
void *ptr; /* MAC callback parameter */
uint8_t transmissions; /* #transmissions performed for this packet */
uint8_t max_transmissions; /* maximal number of Tx before dropping the packet */
uint8_t ret; /* status -- MAC return code */
uint8_t header_len; /* length of header and header IEs (needed for link-layer security) */
uint8_t tsch_sync_ie_offset; /* Offset within the frame used for quick update of EB ASN and join priority */
@ -176,7 +177,8 @@ struct tsch_neighbor *tsch_queue_get_time_source(void);
/* Update TSCH time source */
int tsch_queue_update_time_source(const linkaddr_t *new_addr);
/* Add packet to neighbor queue. Use same lockfree implementation as ringbuf.c (put is atomic) */
struct tsch_packet *tsch_queue_add_packet(const linkaddr_t *addr, mac_callback_t sent, void *ptr);
struct tsch_packet *tsch_queue_add_packet(const linkaddr_t *addr, uint8_t max_transmissions,
mac_callback_t sent, void *ptr);
/* Returns the number of packets currently in any TSCH queue */
int tsch_queue_global_packet_count(void);
/* Returns the number of packets currently a given neighbor queue */

15
os/net/mac/tsch/tsch.c
View File

@ -832,8 +832,8 @@ PROCESS_THREAD(tsch_send_eb_process, ev, data)
/* Prepare the EB packet and schedule it to be sent */
if(tsch_packet_create_eb(&hdr_len, &tsch_sync_ie_offset) > 0) {
struct tsch_packet *p;
/* Enqueue EB packet */
if(!(p = tsch_queue_add_packet(&tsch_eb_address, NULL, NULL))) {
/* Enqueue EB packet, for a single transmission only */
if(!(p = tsch_queue_add_packet(&tsch_eb_address, 1, NULL, NULL))) {
LOG_ERR("! could not enqueue EB packet\n");
} else {
LOG_INFO("TSCH: enqueue EB packet %u %u\n",
@ -958,6 +958,7 @@ send_packet(mac_callback_t sent, void *ptr)
int ret = MAC_TX_DEFERRED;
int hdr_len = 0;
const linkaddr_t *addr = packetbuf_addr(PACKETBUF_ADDR_RECEIVER);
uint8_t max_transmissions = 0;
if(!tsch_is_associated) {
if(!tsch_is_initialized) {
@ -1006,13 +1007,21 @@ send_packet(mac_callback_t sent, void *ptr)
packetbuf_set_addr(PACKETBUF_ADDR_SENDER, &linkaddr_node_addr);
#endif
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
max_transmissions = packetbuf_attr(PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS);
#endif
if(max_transmissions == 0) {
/* If not set by the application, use the default TSCH value */
max_transmissions = TSCH_MAC_MAX_FRAME_RETRIES + 1;
}
if((hdr_len = NETSTACK_FRAMER.create()) < 0) {
LOG_ERR("! can't send packet due to framer error\n");
ret = MAC_TX_ERR;
} else {
struct tsch_packet *p;
/* Enqueue packet */
p = tsch_queue_add_packet(addr, sent, ptr);
p = tsch_queue_add_packet(addr, max_transmissions, sent, ptr);
if(p == NULL) {
LOG_ERR("! can't send packet to ");
LOG_ERR_LLADDR(addr);

3
os/net/packetbuf.h
View File

@ -217,6 +217,9 @@ enum {
PACKETBUF_ATTR_LINK_QUALITY,
PACKETBUF_ATTR_RSSI,
PACKETBUF_ATTR_TIMESTAMP,
#if UIP_WITH_VARIABLE_RETRANSMISSIONS
PACKETBUF_ATTR_MAX_MAC_TRANSMISSIONS,
#endif /* UIP_WITH_VARIABLE_RETRANSMISSIONS */
PACKETBUF_ATTR_MAC_SEQNO,
PACKETBUF_ATTR_MAC_ACK,
PACKETBUF_ATTR_MAC_METADATA,

6
tests/13-ieee802154/code-flush-nbr-queue/test-flush-nbr-queue.c
View File

@ -58,7 +58,7 @@ UNIT_TEST(test)
UNIT_TEST_BEGIN();
packet = tsch_queue_add_packet(TEST_PEER_ADDR, NULL, NULL);
packet = tsch_queue_add_packet(TEST_PEER_ADDR, 1, NULL, NULL);
UNIT_TEST_ASSERT(packet != NULL);
nbr = tsch_queue_get_nbr(TEST_PEER_ADDR);
@ -68,14 +68,14 @@ UNIT_TEST(test)
* QUEUEBUF_CONF_NUM is set with 1; so another addition should fail due to
* lack of memory.
*/
packet = tsch_queue_add_packet(TEST_PEER_ADDR, NULL, NULL);
packet = tsch_queue_add_packet(TEST_PEER_ADDR, 1, NULL, NULL);
UNIT_TEST_ASSERT(packet == NULL);
/* tsch_queue_flush_nbr_queue() is called inside of tsch_queue_reset(). */
tsch_queue_reset();
/* After flushing the nbr queue, we should be able to add a new packet */
packet = tsch_queue_add_packet(TEST_PEER_ADDR, NULL, NULL);
packet = tsch_queue_add_packet(TEST_PEER_ADDR, 1, NULL, NULL);
UNIT_TEST_ASSERT(packet != NULL);
UNIT_TEST_END();

5
tests/14-rpl-lite/07-rpl-random-rearrangement.csc
View File

@ -544,7 +544,7 @@ make receiver-node.cooja TARGET=cooja</commands>
}&#xD;
&#xD;
function getRandom(min, max) {&#xD;
return Math.random() * (max - min) + min;&#xD;
return r.nextFloat() * (max - min) + min;&#xD;
}&#xD;
&#xD;
// From: http://bost.ocks.org/mike/shuffle/&#xD;
@ -555,7 +555,7 @@ function shuffle(array) {&#xD;
while (m) {&#xD;
&#xD;
// Pick a remaining element…&#xD;
i = Math.floor(Math.random() * m--);&#xD;
i = Math.floor(r.nextFloat() * m--);&#xD;
&#xD;
// And swap it with the current element.&#xD;
t = array[m];&#xD;
@ -571,6 +571,7 @@ GENERATE_MSG(1200000, 'randomize-nodes');&#xD;
GENERATE_MSG(2400000, 'randomize-nodes');&#xD;
GENERATE_MSG(3600000, 'randomize-nodes');&#xD;
&#xD;
var r = new java.util.Random(sim.getRandomSeed());&#xD;
var numForwarders = 20;&#xD;
var forwardIDStart = 4;&#xD;
packetsReceived = [];&#xD;

5
tests/15-rpl-classic/07-rpl-random-rearrangement.csc
View File

@ -544,7 +544,7 @@ make receiver-node.cooja TARGET=cooja</commands>
}&#xD;
&#xD;
function getRandom(min, max) {&#xD;
return Math.random() * (max - min) + min;&#xD;
return r.nextFloat() * (max - min) + min;&#xD;
}&#xD;
&#xD;
// From: http://bost.ocks.org/mike/shuffle/&#xD;
@ -555,7 +555,7 @@ function shuffle(array) {&#xD;
while (m) {&#xD;
&#xD;
// Pick a remaining element…&#xD;
i = Math.floor(Math.random() * m--);&#xD;
i = Math.floor(r.nextFloat() * m--);&#xD;
&#xD;
// And swap it with the current element.&#xD;
t = array[m];&#xD;
@ -571,6 +571,7 @@ GENERATE_MSG(1200000, 'randomize-nodes');&#xD;
GENERATE_MSG(2400000, 'randomize-nodes');&#xD;
GENERATE_MSG(3600000, 'randomize-nodes');&#xD;
&#xD;
var r = new java.util.Random(sim.getRandomSeed());&#xD;
var numForwarders = 20;&#xD;
var forwardIDStart = 4;&#xD;
packetsReceived = [];&#xD;