/*---------------------------------------------------------------------------*/
void
uip_ds6_neighbor_periodic(void)
{
/* Periodic processing on neighbors */
uip_ds6_nbr_t *nbr = nbr_table_head(ds6_neighbors);
while(nbr != NULL) {
switch(nbr->state) {
case NBR_REACHABLE:
if(stimer_expired(&nbr->reachable)) {
PRINTF("REACHABLE: moving to STALE (");
PRINT6ADDR(&nbr->ipaddr);
PRINTF(")\n");
nbr->state = NBR_STALE;
}
break;
#if UIP_ND6_SEND_NA
case NBR_INCOMPLETE:
if(nbr->nscount >= UIP_ND6_MAX_MULTICAST_SOLICIT) {
uip_ds6_nbr_rm(nbr);
} else if(stimer_expired(&nbr->sendns) && (uip_len == 0)) {
nbr->nscount++;
PRINTF("NBR_INCOMPLETE: NS %u\n", nbr->nscount);
uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
}
break;
case NBR_DELAY:
if(stimer_expired(&nbr->reachable)) {
nbr->state = NBR_PROBE;
nbr->nscount = 0;
PRINTF("DELAY: moving to PROBE\n");
stimer_set(&nbr->sendns, 0);
}
break;
case NBR_PROBE:
if(nbr->nscount >= UIP_ND6_MAX_UNICAST_SOLICIT) {
uip_ds6_defrt_t *locdefrt;
PRINTF("PROBE END\n");
if((locdefrt = uip_ds6_defrt_lookup(&nbr->ipaddr)) != NULL) {
if (!locdefrt->isinfinite) {
uip_ds6_defrt_rm(locdefrt);
}
}
uip_ds6_nbr_rm(nbr);
} else if(stimer_expired(&nbr->sendns) && (uip_len == 0)) {
nbr->nscount++;
PRINTF("PROBE: NS %u\n", nbr->nscount);
uip_nd6_ns_output(NULL, &nbr->ipaddr, &nbr->ipaddr);
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
}
break;
#endif /* UIP_ND6_SEND_NA */
default:
break;
}
nbr = nbr_table_next(ds6_neighbors, nbr);
}
}
static httpd_cgi_call_t *
webserver_network_nbr_rm(struct httpd_state *s)
{
uip_ds6_nbr_t *neighbor;
uip_ipaddr_t ipaddr;
webserver_result_title = "Network";
webserver_result_text = "Delete neighbor: Neighbor not found";
if(s->query && uiplib_ipaddrconv(s->query, &ipaddr) != 0) {
neighbor = uip_ds6_nbr_lookup(&ipaddr);
if (neighbor) {
uip_ds6_nbr_rm(neighbor);
webserver_result_text = "Neighbor deleted";
}
}
return &webserver_result_page;
}
/*---------------------------------------------------------------------------*/
static void
rs_input(void)
{
PRINTF("Received RS from");
PRINT6ADDR(&UIP_IP_BUF->srcipaddr);
PRINTF("to");
PRINT6ADDR(&UIP_IP_BUF->destipaddr);
PRINTF("\n");
UIP_STAT(++uip_stat.nd6.recv);
#if UIP_CONF_IPV6_CHECKS
/*
* Check hop limit / icmp code
* target address must not be multicast
* if the NA is solicited, dest must not be multicast
*/
if((UIP_IP_BUF->ttl != UIP_ND6_HOP_LIMIT) || (UIP_ICMP_BUF->icode != 0)) {
PRINTF("RS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
/* Only valid option is Source Link-Layer Address option any thing
else is discarded */
nd6_opt_offset = UIP_ND6_RS_LEN;
nd6_opt_llao = NULL;
while(uip_l3_icmp_hdr_len + nd6_opt_offset < uip_len) {
#if UIP_CONF_IPV6_CHECKS
if(UIP_ND6_OPT_HDR_BUF->len == 0) {
PRINTF("RS received is bad\n");
goto discard;
}
#endif /*UIP_CONF_IPV6_CHECKS */
switch (UIP_ND6_OPT_HDR_BUF->type) {
case UIP_ND6_OPT_SLLAO:
nd6_opt_llao = (uint8_t *)UIP_ND6_OPT_HDR_BUF;
break;
default:
PRINTF("ND option not supported in RS\n");
break;
}
nd6_opt_offset += (UIP_ND6_OPT_HDR_BUF->len << 3);
}
/* Options processing: only SLLAO */
if(nd6_opt_llao != NULL) {
#if UIP_CONF_IPV6_CHECKS
if(uip_is_addr_unspecified(&UIP_IP_BUF->srcipaddr)) {
PRINTF("RS received is bad\n");
goto discard;
} else {
#endif /*UIP_CONF_IPV6_CHECKS */
/* Copy link address to a uip_lladdr_t first
* to ensure the second argument to uip_ds6_nbr_add is word-aligned */
uip_lladdr_t lladdr;
memcpy(&lladdr, &nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET], UIP_LLADDR_LEN);
if((nbr = uip_ds6_nbr_lookup(&UIP_IP_BUF->srcipaddr)) == NULL) {
/* we need to add the neighbor */
uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 0, NBR_STALE);
} else {
/* If LL address changed, set neighbor state to stale */
if(memcmp(&nd6_opt_llao[UIP_ND6_OPT_DATA_OFFSET],
uip_ds6_nbr_get_ll(nbr), UIP_LLADDR_LEN) != 0) {
uip_ds6_nbr_t nbr_data = *nbr;
uip_ds6_nbr_rm(nbr);
nbr = uip_ds6_nbr_add(&UIP_IP_BUF->srcipaddr, &lladdr, 0, NBR_STALE);
nbr->reachable = nbr_data.reachable;
nbr->sendns = nbr_data.sendns;
nbr->nscount = nbr_data.nscount;
}
nbr->isrouter = 0;
}
#if UIP_CONF_IPV6_CHECKS
}
#endif /*UIP_CONF_IPV6_CHECKS */
}
/* Schedule a sollicited RA */
uip_ds6_send_ra_sollicited();
discard:
uip_clear_buf();
return;
}
/*---------------------------------------------------------------------------*/
uip_ds6_nbr_t *
uip_ds6_nbr_add(uip_ipaddr_t *ipaddr, uip_lladdr_t *lladdr,
uint8_t isrouter, uint8_t state)
{
int r;
r = uip_ds6_list_loop
((uip_ds6_element_t *)uip_ds6_nbr_cache, UIP_DS6_NBR_NB,
sizeof(uip_ds6_nbr_t), ipaddr, 128,
(uip_ds6_element_t **)&locnbr);
if(r == FREESPACE) {
locnbr->isused = 1;
uip_ipaddr_copy(&locnbr->ipaddr, ipaddr);
if(lladdr != NULL) {
memcpy(&locnbr->lladdr, lladdr, UIP_LLADDR_LEN);
} else {
memset(&locnbr->lladdr, 0, UIP_LLADDR_LEN);
}
locnbr->isrouter = isrouter;
locnbr->state = state;
#if UIP_CONF_IPV6_QUEUE_PKT
uip_packetqueue_new(&locnbr->packethandle);
#endif /* UIP_CONF_IPV6_QUEUE_PKT */
/* timers are set separately, for now we put them in expired state */
stimer_set(&locnbr->reachable, 0);
stimer_set(&locnbr->sendns, 0);
locnbr->nscount = 0;
PRINTF("Adding neighbor with ip addr ");
PRINT6ADDR(ipaddr);
PRINTF("link addr ");
PRINTLLADDR((&(locnbr->lladdr)));
PRINTF("state %u\n", state);
NEIGHBOR_STATE_CHANGED(locnbr);
locnbr->last_lookup = clock_time();
return locnbr;
} else if(r == NOSPACE) {
/* We did not find any empty slot on the neighbor list, so we need
to remove one old entry to make room. */
uip_ds6_nbr_t *n, *oldest;
clock_time_t oldest_time;
oldest = NULL;
oldest_time = clock_time();
for(n = uip_ds6_nbr_cache;
n < &uip_ds6_nbr_cache[UIP_DS6_NBR_NB];
n++) {
if(n->isused) {
if(n->last_lookup < oldest_time) {
oldest = n;
oldest_time = n->last_lookup;
}
}
}
if(oldest != NULL) {
uip_ds6_nbr_rm(oldest);
return uip_ds6_nbr_add(ipaddr, lladdr, isrouter, state);
}
}
PRINTF("uip_ds6_nbr_add drop\n");
return NULL;
}
/*---------------------------------------------------------------------------*/
void
uip_ds6_periodic(void)
{
/* Periodic processing on unicast addresses */
for(locaddr = uip_ds6_if.addr_list;
locaddr < uip_ds6_if.addr_list + UIP_DS6_ADDR_NB; locaddr++) {
if(locaddr->isused) {
if((!locaddr->isinfinite) && (stimer_expired(&locaddr->vlifetime))) {
uip_ds6_addr_rm(locaddr);
#if UIP_ND6_DEF_MAXDADNS > 0
} else if((locaddr->state == ADDR_TENTATIVE)
&& (locaddr->dadnscount <= uip_ds6_if.maxdadns)
&& (timer_expired(&locaddr->dadtimer))
&& (uip_len == 0)) {
uip_ds6_dad(locaddr);
#endif /* UIP_ND6_DEF_MAXDADNS > 0 */
}
}
}
/* Periodic processing on default routers */
for(locdefrt = uip_ds6_defrt_list;
locdefrt < uip_ds6_defrt_list + UIP_DS6_DEFRT_NB; locdefrt++) {
if((locdefrt->isused) && (!locdefrt->isinfinite) &&
(stimer_expired(&(locdefrt->lifetime)))) {
uip_ds6_defrt_rm(locdefrt);
}
}
#if !UIP_CONF_ROUTER
/* Periodic processing on prefixes */
for(locprefix = uip_ds6_prefix_list;
locprefix < uip_ds6_prefix_list + UIP_DS6_PREFIX_NB;
locprefix++) {
if(locprefix->isused && !locprefix->isinfinite
&& stimer_expired(&(locprefix->vlifetime))) {
uip_ds6_prefix_rm(locprefix);
}
}
#endif /* !UIP_CONF_ROUTER */
/* Periodic processing on neighbors */
for(locnbr = uip_ds6_nbr_cache;
locnbr < uip_ds6_nbr_cache + UIP_DS6_NBR_NB;
locnbr++) {
if(locnbr->isused) {
switch(locnbr->state) {
case NBR_INCOMPLETE:
if(locnbr->nscount >= UIP_ND6_MAX_MULTICAST_SOLICIT) {
uip_ds6_nbr_rm(locnbr);
} else if(stimer_expired(&locnbr->sendns) && (uip_len == 0)) {
locnbr->nscount++;
PRINTF("NBR_INCOMPLETE: NS %u\n", locnbr->nscount);
uip_nd6_ns_output(NULL, NULL, &locnbr->ipaddr);
stimer_set(&locnbr->sendns, uip_ds6_if.retrans_timer / 1000);
}
break;
case NBR_REACHABLE:
if(stimer_expired(&locnbr->reachable)) {
PRINTF("REACHABLE: moving to STALE (");
PRINT6ADDR(&locnbr->ipaddr);
PRINTF(")\n");
locnbr->state = NBR_STALE;
}
break;
case NBR_DELAY:
if(stimer_expired(&locnbr->reachable)) {
locnbr->state = NBR_PROBE;
locnbr->nscount = 0;
PRINTF("DELAY: moving to PROBE\n");
stimer_set(&locnbr->sendns, 0);
}
break;
case NBR_PROBE:
if(locnbr->nscount >= UIP_ND6_MAX_UNICAST_SOLICIT) {
PRINTF("PROBE END\n");
if((locdefrt = uip_ds6_defrt_lookup(&locnbr->ipaddr)) != NULL) {
if (!locdefrt->isinfinite) {
uip_ds6_defrt_rm(locdefrt);
}
}
uip_ds6_nbr_rm(locnbr);
} else if(stimer_expired(&locnbr->sendns) && (uip_len == 0)) {
locnbr->nscount++;
PRINTF("PROBE: NS %u\n", locnbr->nscount);
uip_nd6_ns_output(NULL, &locnbr->ipaddr, &locnbr->ipaddr);
stimer_set(&locnbr->sendns, uip_ds6_if.retrans_timer / 1000);
}
break;
default:
break;
}
}
}
#if UIP_CONF_ROUTER & UIP_ND6_SEND_RA
/* Periodic RA sending */
if(stimer_expired(&uip_ds6_timer_ra) && (uip_len == 0)) {
uip_ds6_send_ra_periodic();
}
#endif /* UIP_CONF_ROUTER & UIP_ND6_SEND_RA */
etimer_reset(&uip_ds6_timer_periodic);
return;
}
/** Periodic processing on neighbors */
void
uip_ds6_neighbor_periodic(void)
{
uip_ds6_nbr_t *nbr = nbr_table_head(ds6_neighbors);
while(nbr != NULL) {
switch(nbr->state) {
case NBR_REACHABLE:
if(stimer_expired(&nbr->reachable)) {
#if UIP_CONF_IPV6_RPL
/* when a neighbor leave its REACHABLE state and is a default router,
instead of going to STALE state it enters DELAY state in order to
force a NUD on it. Otherwise, if there is no upward traffic, the
node never knows if the default router is still reachable. This
mimics the 6LoWPAN-ND behavior.
*/
if(uip_ds6_defrt_lookup(&nbr->ipaddr) != NULL) {
PRINTF("REACHABLE: defrt moving to DELAY (");
PRINT6ADDR(&nbr->ipaddr);
PRINTF(")\n");
nbr->state = NBR_DELAY;
stimer_set(&nbr->reachable, UIP_ND6_DELAY_FIRST_PROBE_TIME);
nbr->nscount = 0;
} else {
PRINTF("REACHABLE: moving to STALE (");
PRINT6ADDR(&nbr->ipaddr);
PRINTF(")\n");
nbr->state = NBR_STALE;
}
#else /* UIP_CONF_IPV6_RPL */
PRINTF("REACHABLE: moving to STALE (");
PRINT6ADDR(&nbr->ipaddr);
PRINTF(")\n");
nbr->state = NBR_STALE;
#endif /* UIP_CONF_IPV6_RPL */
}
break;
case NBR_INCOMPLETE:
if(nbr->nscount >= UIP_ND6_MAX_MULTICAST_SOLICIT) {
uip_ds6_nbr_rm(nbr);
} else if(stimer_expired(&nbr->sendns) && (uip_len == 0)) {
nbr->nscount++;
PRINTF("NBR_INCOMPLETE: NS %u\n", nbr->nscount);
uip_nd6_ns_output(NULL, NULL, &nbr->ipaddr);
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
}
break;
case NBR_DELAY:
if(stimer_expired(&nbr->reachable)) {
nbr->state = NBR_PROBE;
nbr->nscount = 0;
PRINTF("DELAY: moving to PROBE\n");
stimer_set(&nbr->sendns, 0);
}
break;
case NBR_PROBE:
if(nbr->nscount >= UIP_ND6_MAX_UNICAST_SOLICIT) {
uip_ds6_defrt_t *locdefrt;
PRINTF("PROBE END\n");
if((locdefrt = uip_ds6_defrt_lookup(&nbr->ipaddr)) != NULL) {
if (!locdefrt->isinfinite) {
uip_ds6_defrt_rm(locdefrt);
}
}
uip_ds6_nbr_rm(nbr);
} else if(stimer_expired(&nbr->sendns) && (uip_len == 0)) {
nbr->nscount++;
PRINTF("PROBE: NS %u\n", nbr->nscount);
uip_nd6_ns_output(NULL, &nbr->ipaddr, &nbr->ipaddr);
stimer_set(&nbr->sendns, uip_ds6_if.retrans_timer / 1000);
}
break;
default:
break;
}
nbr = nbr_table_next(ds6_neighbors, nbr);
}
}
/*---------------------------------------------------------------------------*/
httpd_simple_script_t
httpd_simple_get_script(const char *name)
{
static uip_ds6_route_t *r;
static char filename[HTTPD_PATHLEN];
static int i;
strcpy(filename, slip_config_www_root);
strcat(filename, "/");
strcat(filename, name);
redirect = 0;
if(strcmp(name, "index.html") == 0 || strcmp(name, "") == 0) {
return generate_index;
#if CONTIKI_TARGET_NATIVE
} else if (access(filename, R_OK) == 0) {
return send_file;
#endif
#if CETIC_NODE_INFO
} else if(strcmp(name, "sensors.html") == 0) {
return generate_sensors;
#endif
} else if(strcmp(name, "rpl.html") == 0) {
return generate_rpl;
} else if(strcmp(name, "network.html") == 0) {
return generate_network;
} else if(strcmp(name, "config.html") == 0) {
return generate_config;
} else if(strcmp(name, "statistics.html") == 0) {
return generate_statistics;
} else if ((nvm_data.global_flags & CETIC_GLOBAL_DISABLE_CONFIG) == 0) {
if(strcmp(name, "rpl-gr") == 0) {
#if UIP_CONF_IPV6_RPL
rpl_repair_root(RPL_DEFAULT_INSTANCE);
#endif
return generate_rpl;
} else if(memcmp(name, "route_rm?", 9) == 0) {
redirect = 1;
i = atoi(name + 9);
for(r = uip_ds6_route_list_head(); r != NULL; r = list_item_next(r), --i) {
if(i == 0) {
uip_ds6_route_rm(r);
break;
}
}
return generate_network;
} else if(memcmp(name, "nbr_rm?", 7) == 0) {
redirect = 1;
uip_ds6_nbr_rm(&uip_ds6_nbr_cache[atoi(name + 7)]);
return generate_network;
} else if(memcmp(name, "config?", 7) == 0) {
if(update_config(name + 7)) {
return generate_config;
} else {
return generate_reboot;
}
} else {
return generate_404;
}
} else {
return generate_404;
}
}
/*---------------------------------------------------------------------------*/
uip_ds6_nbr_t *
uip_ds6_nbr_add(uip_ipaddr_t * ipaddr, uip_lladdr_t * lladdr,
u8_t isrouter, u8_t state)
{
int r;
r = uip_ds6_list_loop
((uip_ds6_element_t *) uip_ds6_nbr_cache, UIP_DS6_NBR_NB,
sizeof(uip_ds6_nbr_t), ipaddr, 128,
(uip_ds6_element_t **) &locnbr);
// printf("r %d\n", r);
if(r == FREESPACE) {
locnbr->isused = 1;
uip_ipaddr_copy(&(locnbr->ipaddr), ipaddr);
if(lladdr != NULL) {
memcpy(&(locnbr->lladdr), lladdr, UIP_LLADDR_LEN);
} else {
memset(&(locnbr->lladdr), 0, UIP_LLADDR_LEN);
}
locnbr->isrouter = isrouter;
locnbr->state = state;
/* timers are set separately, for now we put them in expired state */
stimer_set(&(locnbr->reachable), 0);
stimer_set(&(locnbr->sendns), 0);
locnbr->nscount = 0;
PRINTF("Adding neighbor with ip addr");
PRINT6ADDR(ipaddr);
PRINTF("link addr");
PRINTLLADDR((&(locnbr->lladdr)));
PRINTF("state %u\n", state);
NEIGHBOR_STATE_CHANGED(locnbr);
locnbr->last_lookup = clock_time();
// printf("add %p\n", locnbr);
return locnbr;
} else if(r == NOSPACE) {
/* We did not find any empty slot on the neighbor list, so we need
to remove one old entry to make room. */
uip_ds6_nbr_t *n, *oldest;
clock_time_t oldest_time;
oldest = NULL;
oldest_time = clock_time();
for(n = uip_ds6_nbr_cache;
n < &uip_ds6_nbr_cache[UIP_DS6_NBR_NB];
n++) {
if(n->isused) {
if((n->last_lookup < oldest_time) && (uip_ds6_is_nbr_garbage_collectible(n))) {
/* We do not want to remove any non-garbage-collectible entry */
oldest = n;
oldest_time = n->last_lookup;
}
}
}
if(oldest != NULL) {
// printf("rm3\n");
uip_ds6_nbr_rm(oldest);
locdefrt = uip_ds6_defrt_lookup(&oldest->ipaddr);
uip_ds6_defrt_rm(locdefrt);
uip_ds6_reg_cleanup_defrt(locdefrt);
return uip_ds6_nbr_add(ipaddr, lladdr, isrouter, state);
}
}
PRINTF("uip_ds6_nbr_add drop\n");
return NULL;
}
/*---------------------------------------------------------------------------*/
void
uip_ds6_periodic(void)
{
/* This flag signals whether we allow or not to send a packet in the current
* invocation. */
u8_t allow_output = 1;
/* minimum lifetime */
min_lifetime = 0xFFFFFFFF;
/* router with minimum lifetime */
min_defrt = NULL;
/* Periodic processing on registrations */
for(locreg = uip_ds6_reg_list;
locreg < uip_ds6_reg_list + UIP_DS6_REG_LIST_SIZE; locreg++) {
if (locreg->isused) {
if (stimer_expired(&locreg->reg_lifetime)) {
uip_ds6_reg_rm(locreg);
} else if (allow_output) {
/* If no output is allowed, it is pointless to enter here in this invocation */
if (uip_ds6_if.registration_in_progress) {
/* There is a registration in progress */
if ((locreg == uip_ds6_if.registration_in_progress) &&
(timer_expired(&locreg->registration_timer))) {
/* We already sent a NS message for this address but there has been no response */
if(locreg->reg_count >= UIP_ND6_MAX_UNICAST_SOLICIT) {
/* NUD failed. Signal the need for next-hop determination by deleting the
* NCE (RFC 4861) */
uip_ds6_reg_rm(locreg);
/* And then, delete neighbor and corresponding router (as hosts only keep
* NCEs for routers in 6lowpan-nd) */
locnbr = uip_ds6_nbr_lookup(&locreg->defrt->ipaddr);
uip_ds6_nbr_rm(locnbr);
uip_ds6_defrt_rm(locreg->defrt);
/* Since we are deleting a default router, we must delete also all
* registrations with that router.
* Be careful here, uip_ds6_reg_cleanup_defrt() modifies the value of locreg!*/
uip_ds6_reg_cleanup_defrt(locreg->defrt);
/* We will also need to start sending RS, as specified in I-D.ietf-6lowpan-nd
* for NUD failure case */
uip_ds6_send_rs(NULL);
uip_ds6_if.registration_in_progress = NULL;
} else {
locreg->reg_count++;
timer_restart(&locreg->registration_timer);
uip_nd6_ns_output(&locreg->addr->ipaddr, &locreg->defrt->ipaddr,
&locreg->defrt->ipaddr, 1, UIP_ND6_REGISTRATION_LIFETIME);
}
allow_output = 0; /* Prevent this invocation from sending anything else */
}
} else {
/* There are no registrations in progress, let's see this entry needs (re)registration
* or deletion */
if ((locreg->state == REG_GARBAGE_COLLECTIBLE) ||
(locreg->state == REG_TO_BE_UNREGISTERED) ||
((locreg->state == REG_REGISTERED) &&
(stimer_remaining(&locreg->reg_lifetime) < stimer_elapsed(&locreg->reg_lifetime)))) {
/* Issue (re)registration */
uip_ds6_if.registration_in_progress = locreg;
locreg->reg_count++;
timer_set(&locreg->registration_timer, (uip_ds6_if.retrans_timer / 1000) * (CLOCK_SECOND /* FIXME @@@jwg!!!!*/+250));
if (locreg->state == REG_TO_BE_UNREGISTERED) {
uip_nd6_ns_output(&locreg->addr->ipaddr, &locreg->defrt->ipaddr,
&locreg->defrt->ipaddr, 1, 0);
} else {
uip_nd6_ns_output(&locreg->addr->ipaddr, &locreg->defrt->ipaddr,
&locreg->defrt->ipaddr, 1, UIP_ND6_REGISTRATION_LIFETIME);
}
allow_output = 0; /* Prevent this invocation from sending anything else */
}
}
}
}
}
/* Periodic processing on unicast addresses */
for(locaddr = uip_ds6_if.addr_list;
locaddr < uip_ds6_if.addr_list + UIP_DS6_ADDR_NB; locaddr++) {
if(locaddr->isused) {
if((!locaddr->isinfinite) && (stimer_expired(&locaddr->vlifetime))) {
uip_ds6_addr_rm(locaddr);
} else if (allow_output) {
if (stimer_remaining(&locaddr->vlifetime) < min_lifetime) {
min_lifetime = stimer_remaining(&locaddr->vlifetime);
min_defrt = locaddr->defrt;
}
}
}
}
/* Periodic processing on default routers */
if (uip_ds6_defrt_choose() == NULL) {
if (allow_output) {
/* If default router list is empty, start sending RS */
uip_ds6_send_rs(NULL);
allow_output = 0; /* Prevent this invocation from sending anything else */
}
} else {
for(locdefrt = uip_ds6_defrt_list;
locdefrt < uip_ds6_defrt_list + UIP_DS6_DEFRT_NB; locdefrt++) {
if((locdefrt->isused) && (!locdefrt->isinfinite)) {
if (stimer_expired(&(locdefrt->lifetime))) {
uip_ds6_defrt_rm(locdefrt);
/* If default router list is empty, we will start sending RS in
* the next invocation of ds6_periodic() */
} else {
if (allow_output) {
if (stimer_remaining(&locdefrt->lifetime) < min_lifetime) {
min_lifetime = stimer_remaining(&locdefrt->lifetime);
min_defrt = locdefrt;
}
}
}
}
}
}
#if !UIP_CONF_ROUTER
/* Periodic processing on prefixes */
for (locprefix = uip_ds6_prefix_list;
locprefix < uip_ds6_prefix_list + UIP_DS6_PREFIX_NB; locprefix++) {
if((locprefix->isused) && (!locprefix->isinfinite)) {
if (stimer_expired(&locprefix->vlifetime)) {
uip_ds6_prefix_rm(locprefix);
} else if (allow_output) {
if (stimer_remaining(&locprefix->vlifetime) < min_lifetime) {
min_lifetime = stimer_remaining(&locprefix->vlifetime);
min_defrt = locprefix->defrt;
}
}
}
}
#endif /* !UIP_CONF_ROUTER */
#if CONF_6LOWPAN_ND_6CO
/* Periodic processing on contexts */
for(loccontext = uip_ds6_addr_context_table;
loccontext < uip_ds6_addr_context_table + SICSLOWPAN_CONF_MAX_ADDR_CONTEXTS; loccontext++) {
if(loccontext->state != NOT_IN_USE) {
if (stimer_expired(&loccontext->vlifetime)) {
if (loccontext->state != EXPIRED) {
loccontext->state = IN_USE_UNCOMPRESS_ONLY;
stimer_set(&loccontext->vlifetime, 2 * loccontext->defrt_lifetime);
} else {
uip_ds6_context_rm(loccontext);
}
} else if (allow_output) {
if (stimer_remaining(&loccontext->vlifetime) < min_lifetime) {
min_lifetime = stimer_remaining(&loccontext->vlifetime);
min_defrt = loccontext->defrt;
}
}
}
}
#endif /* CONF_6LOWPAN_ND_6CO */
/* Start sending RS well before the minimum of the lifetimes (def. router,
* context, or prefix) expires */
if ((allow_output) && (min_lifetime < UIP_DS6_LIFETIME_THRESHOLD)) {
/* Start sending RSs to the router with minimum lifetime (if possible) */
uip_ds6_send_rs(min_defrt);
allow_output = 0;
}
/* Periodic processing on neighbors */
for(locnbr = uip_ds6_nbr_cache; locnbr < uip_ds6_nbr_cache + UIP_DS6_NBR_NB;
locnbr++) {
if(locnbr->isused) {
switch (locnbr->state) {
#if UIP_CONF_ROUTER
/* There can not be INCOMPLETE NCEs in a host in 6lowpan-nd */
case NBR_INCOMPLETE:
if (allow_output) {
if(locnbr->nscount >= UIP_ND6_MAX_MULTICAST_SOLICIT) {
uip_ds6_nbr_rm(locnbr);
} else if(stimer_expired(&(locnbr->sendns))) {
locnbr->nscount++;
PRINTF("NBR_INCOMPLETE: NS %u\n", locnbr->nscount);
uip_nd6_ns_output(NULL, NULL, &locnbr->ipaddr);
stimer_set(&(locnbr->sendns), uip_ds6_if.retrans_timer / 1000);
allow_output = 0;
}
}
break;
#endif /* UIP_CONF_ROUTER */
case NBR_REACHABLE:
if(stimer_expired(&(locnbr->reachable))) {
PRINTF("REACHABLE: moving to STALE (");
PRINT6ADDR(&locnbr->ipaddr);
PRINTF(")\n");
locnbr->state = NBR_STALE;
NEIGHBOR_STATE_CHANGED(locnbr);
}
break;
case NBR_DELAY:
if (allow_output) {
if(stimer_expired(&(locnbr->reachable))) {
locnbr->state = NBR_PROBE;
locnbr->nscount = 1;
NEIGHBOR_STATE_CHANGED(locnbr);
PRINTF("DELAY: moving to PROBE + NS %u\n", locnbr->nscount);
uip_nd6_ns_output(NULL, &locnbr->ipaddr, &locnbr->ipaddr, 0, 0);
stimer_set(&(locnbr->sendns), uip_ds6_if.retrans_timer / 1000);
allow_output = 0;
}
}
break;
case NBR_PROBE:
if (allow_output) {
if(locnbr->nscount >= UIP_ND6_MAX_UNICAST_SOLICIT) {
PRINTF("PROBE END \n");
if((locdefrt = uip_ds6_defrt_lookup(&locnbr->ipaddr)) != NULL) {
uip_ds6_defrt_rm(locdefrt);
}
uip_ds6_nbr_rm(locnbr);
} else if(stimer_expired(&(locnbr->sendns))) {
locnbr->nscount++;
PRINTF("PROBE: NS %u\n", locnbr->nscount);
uip_nd6_ns_output(NULL, &locnbr->ipaddr, &locnbr->ipaddr, 0, 0);
stimer_set(&(locnbr->sendns), uip_ds6_if.retrans_timer / 1000);
allow_output = 0;
}
}
break;
default:
break;
}
}
}
#if UIP_CONF_ROUTER & UIP_ND6_SEND_RA
/* Periodic RA sending */
if(stimer_expired(&uip_ds6_timer_ra)) {
uip_ds6_send_ra_periodic();
}
#endif /* UIP_CONF_ROUTER & UIP_ND6_SEND_RA */
etimer_reset(&uip_ds6_timer_periodic);
return;
}
