/* sets an entry to stale if its l2addr differs from the given one or creates it stale if it
* does not exist */
static void _stale_nc(kernel_pid_t iface, ipv6_addr_t *ipaddr, uint8_t *l2addr,
int l2addr_len)
{
if (l2addr_len != -ENOTSUP) {
gnrc_ipv6_nc_t *nc_entry = gnrc_ipv6_nc_get(iface, ipaddr);
if (nc_entry == NULL) {
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
/* tentative type see https://tools.ietf.org/html/rfc6775#section-6.3 */
gnrc_ipv6_netif_t *ipv6_iface = gnrc_ipv6_netif_get(iface);
if ((ipv6_iface == NULL) || (ipv6_iface->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER)) {
timex_t t = { GNRC_SIXLOWPAN_ND_TENTATIVE_NCE_LIFETIME, 0 };
gnrc_ipv6_nc_add(iface, ipaddr, l2addr, (uint16_t)l2addr_len,
GNRC_IPV6_NC_STATE_STALE | GNRC_IPV6_NC_TYPE_TENTATIVE);
vtimer_remove(&nc_entry->type_timeout);
vtimer_set_msg(&nc_entry->type_timeout, t, gnrc_ipv6_pid,
GNRC_SIXLOWPAN_ND_MSG_AR_TIMEOUT, nc_entry);
return;
}
#endif
gnrc_ipv6_nc_add(iface, ipaddr, l2addr, (uint16_t)l2addr_len,
GNRC_IPV6_NC_STATE_STALE);
}
else if (((uint16_t)l2addr_len != nc_entry->l2_addr_len) ||
(memcmp(l2addr, nc_entry->l2_addr, l2addr_len) != 0)) {
/* if entry exists but l2 address differs: set */
nc_entry->l2_addr_len = (uint16_t)l2addr_len;
memcpy(nc_entry->l2_addr, l2addr, l2addr_len);
gnrc_ndp_internal_set_state(nc_entry, GNRC_IPV6_NC_STATE_STALE);
}
}
}
static void test_ipv6_nc_add__address_registered(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
gnrc_ipv6_nc_t *entry1, *entry2;
TEST_ASSERT_NOT_NULL((entry1 = gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING4,
sizeof(TEST_STRING4), 0)));
TEST_ASSERT_NOT_NULL((entry2 = gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING4,
sizeof(TEST_STRING4), 0)));
TEST_ASSERT(entry1 == entry2);
}
static void test_ipv6_nc_add__full(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
for (int i = 0; i < GNRC_IPV6_NC_SIZE; i++) {
TEST_ASSERT_NOT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING4,
sizeof(TEST_STRING4), 0));
addr.u16[7].u16++;
}
TEST_ASSERT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING4,
sizeof(TEST_STRING4), 0));
}
static void test_ipv6_nc_add__l2addr_too_long(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
TEST_ASSERT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING4,
GNRC_IPV6_NC_L2_ADDR_MAX + TEST_UINT8, 0));
}
static void test_ipv6_nc_add__addr_unspecified(void)
{
ipv6_addr_t addr = IPV6_ADDR_UNSPECIFIED;
TEST_ASSERT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING4,
sizeof(TEST_STRING4), 0));
}
static void test_ipv6_nc_add__iface_KERNEL_PID_UNDEF(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
TEST_ASSERT_NOT_NULL(gnrc_ipv6_nc_add(KERNEL_PID_UNDEF, &addr, TEST_STRING4,
sizeof(TEST_STRING4), 0));
}
static int _ipv6_nc_add(kernel_pid_t iface, char *ipv6_addr_str,
char *l2_addr_str)
{
ipv6_addr_t ipv6_addr;
uint8_t l2_addr[MAX_L2_ADDR_LEN];
size_t l2_addr_len;
if (ipv6_addr_from_str(&ipv6_addr, ipv6_addr_str) == NULL) {
puts("error: unable to parse IPv6 address.");
return 1;
}
if ((l2_addr_len = gnrc_netif_addr_from_str(l2_addr, sizeof(l2_addr),
l2_addr_str)) == 0) {
puts("error: unable to parse link-layer address.");
return 1;
}
if (gnrc_ipv6_nc_add(iface, &ipv6_addr, l2_addr, l2_addr_len, 0) == NULL) {
puts("error: unable to add address to neighbor cache.");
return 1;
}
printf("success: added IPv6 address %s to neighbor cache\n", ipv6_addr_str);
return 0;
}
static void test_ipv6_nc_add__address_update_despite_free_entry(void)
{
ipv6_addr_t default_addr = DEFAULT_TEST_IPV6_ADDR;
ipv6_addr_t other_addr = OTHER_TEST_IPV6_ADDR;
gnrc_ipv6_nc_t *entry1, *entry2;
TEST_ASSERT_NOT_NULL(gnrc_ipv6_nc_add(OTHER_TEST_NETIF, &other_addr, TEST_STRING4,
sizeof(TEST_STRING4), 0));
TEST_ASSERT_NOT_NULL((entry1 = gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &default_addr, TEST_STRING4,
sizeof(TEST_STRING4), 0)));
/* create space by removing first entry and see if duplicate is still detected & updated */
gnrc_ipv6_nc_remove(OTHER_TEST_NETIF, &other_addr);
TEST_ASSERT_NOT_NULL((entry2 = gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &default_addr, TEST_STRING4,
sizeof(TEST_STRING4), 0)));
TEST_ASSERT(entry1 == entry2);
}
/* sets an entry to stale if its l2addr differs from the given one or creates it stale if it
* does not exist */
static void _stale_nc(kernel_pid_t iface, ipv6_addr_t *ipaddr, uint8_t *l2addr,
int l2addr_len)
{
if (l2addr_len != -ENOTSUP) {
gnrc_ipv6_nc_t *nc_entry = gnrc_ipv6_nc_get(iface, ipaddr);
if (nc_entry == NULL) {
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
/* tentative type see https://tools.ietf.org/html/rfc6775#section-6.3 */
gnrc_ipv6_netif_t *ipv6_iface = gnrc_ipv6_netif_get(iface);
if ((ipv6_iface->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) &&
(ipv6_iface->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER)) {
if ((nc_entry = gnrc_ipv6_nc_add(iface, ipaddr, l2addr,
(uint16_t)l2addr_len,
GNRC_IPV6_NC_STATE_STALE |
GNRC_IPV6_NC_TYPE_TENTATIVE)) != NULL) {
xtimer_set_msg(&nc_entry->type_timeout,
(GNRC_SIXLOWPAN_ND_TENTATIVE_NCE_LIFETIME * SEC_IN_USEC),
&nc_entry->type_timeout_msg,
gnrc_ipv6_pid);
}
return;
}
#endif
gnrc_ipv6_nc_add(iface, ipaddr, l2addr, (uint16_t)l2addr_len,
GNRC_IPV6_NC_STATE_STALE);
}
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
/* unreachable set in gnrc_ndp_retrans_nbr_sol() will just be staled */
else if (gnrc_ipv6_nc_get_state(nc_entry) == GNRC_IPV6_NC_STATE_UNREACHABLE) {
gnrc_ndp_internal_set_state(nc_entry, GNRC_IPV6_NC_STATE_STALE);
}
#endif
else if (((uint16_t)l2addr_len != nc_entry->l2_addr_len) ||
(memcmp(l2addr, nc_entry->l2_addr, l2addr_len) != 0)) {
/* if entry exists but l2 address differs: set */
nc_entry->l2_addr_len = (uint16_t)l2addr_len;
memcpy(nc_entry->l2_addr, l2addr, l2addr_len);
gnrc_ndp_internal_set_state(nc_entry, GNRC_IPV6_NC_STATE_STALE);
}
}
}
static void test_ipv6_nc_get_next__2_entries(void)
{
ipv6_addr_t addr = OTHER_TEST_IPV6_ADDR;
gnrc_ipv6_nc_t *entry = NULL;
test_ipv6_nc_add__success(); /* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF */
TEST_ASSERT_NOT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr, TEST_STRING8,
sizeof(TEST_STRING8) - 1, 0));
TEST_ASSERT_NOT_NULL((entry = gnrc_ipv6_nc_get_next(NULL)));
TEST_ASSERT_NOT_NULL((entry = gnrc_ipv6_nc_get_next(entry)));
TEST_ASSERT_NULL(gnrc_ipv6_nc_get_next(entry));
}
static void test_ipv6_nc_get_next__holey(void)
{
ipv6_addr_t addr1 = OTHER_TEST_IPV6_ADDR;
ipv6_addr_t addr2 = THIRD_TEST_IPV6_ADDR;
gnrc_ipv6_nc_t *entry = NULL, *exp_entry = NULL;
/* adds DEFAULT_TEST_IPV6_ADDR and OTHER_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF */
test_ipv6_nc_get_next__2_entries();
TEST_ASSERT_NOT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr2, TEST_STRING8,
sizeof(TEST_STRING8) - 2, 0));
TEST_ASSERT_NOT_NULL((exp_entry = gnrc_ipv6_nc_get(DEFAULT_TEST_NETIF, &addr2)));
gnrc_ipv6_nc_remove(DEFAULT_TEST_NETIF, &addr1);
TEST_ASSERT_NOT_NULL((entry = gnrc_ipv6_nc_get_next(NULL)));
TEST_ASSERT_NOT_NULL((entry = gnrc_ipv6_nc_get_next(entry)));
TEST_ASSERT(exp_entry == entry);
TEST_ASSERT_NULL(gnrc_ipv6_nc_get_next(entry));
}
/* sets an entry to stale if its l2addr differs from the given one or creates it stale if it
* does not exist */
static void _stale_nc(kernel_pid_t iface, ipv6_addr_t *ipaddr, uint8_t *l2addr,
int l2addr_len)
{
if (l2addr_len != -ENOTSUP) {
gnrc_ipv6_nc_t *nc_entry = gnrc_ipv6_nc_get(iface, ipaddr);
if (nc_entry == NULL) {
gnrc_ipv6_nc_add(iface, ipaddr, l2addr, (uint16_t)l2addr_len,
GNRC_IPV6_NC_STATE_STALE);
}
else if (((uint16_t)l2addr_len != nc_entry->l2_addr_len) ||
(memcmp(l2addr, nc_entry->l2_addr, l2addr_len) != 0)) {
/* if entry exists but l2 address differs: set */
nc_entry->l2_addr_len = (uint16_t)l2addr_len;
memcpy(nc_entry->l2_addr, l2addr, l2addr_len);
gnrc_ndp_internal_set_state(nc_entry, GNRC_IPV6_NC_STATE_STALE);
}
}
}
uint8_t gnrc_sixlowpan_nd_opt_ar_handle(kernel_pid_t iface, ipv6_hdr_t *ipv6, uint8_t icmpv6_type,
sixlowpan_nd_opt_ar_t *ar_opt, uint8_t *sl2a,
size_t sl2a_len)
{
eui64_t eui64;
gnrc_ipv6_netif_t *ipv6_iface;
gnrc_ipv6_nc_t *nc_entry;
uint8_t status = 0;
(void)sl2a;
(void)sl2a_len;
if (ar_opt->len != SIXLOWPAN_ND_OPT_AR_LEN) {
/* discard silently: see https://tools.ietf.org/html/rfc6775#section-5.5.2 */
return 0;
}
if (gnrc_netapi_get(iface, NETOPT_ADDRESS_LONG, 0, &eui64,
sizeof(eui64)) < 0) {
/* discard silently: see https://tools.ietf.org/html/rfc6775#section-5.5.2 */
return 0;
}
ipv6_iface = gnrc_ipv6_netif_get(iface);
nc_entry = gnrc_ipv6_nc_get(iface, &ipv6->src);
switch (icmpv6_type) {
case ICMPV6_NBR_ADV:
if (!(ipv6_iface->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN)) {
DEBUG("6lo nd: interface not a 6LoWPAN interface\n");
return 0;
}
if (eui64.uint64.u64 != ar_opt->eui64.uint64.u64) {
/* discard silently: see https://tools.ietf.org/html/rfc6775#section-5.5.2 */
return 0;
}
switch (ar_opt->status) {
case SIXLOWPAN_ND_STATUS_SUCCESS:
DEBUG("6lo nd: address registration successful\n");
mutex_lock(&ipv6_iface->mutex);
/* reschedule 1 minute before lifetime expires */
timex_t t = { (uint32_t)(byteorder_ntohs(ar_opt->ltime) - 1) * 60, 0 };
vtimer_remove(&nc_entry->nbr_sol_timer);
vtimer_set_msg(&nc_entry->nbr_sol_timer, t, gnrc_ipv6_pid,
GNRC_NDP_MSG_NBR_SOL_RETRANS, nc_entry);
mutex_unlock(&ipv6_iface->mutex);
break;
case SIXLOWPAN_ND_STATUS_DUP:
DEBUG("6lo nd: address registration determined duplicated\n");
/* TODO: handle DAD failed case */
gnrc_ipv6_netif_remove_addr(iface, &ipv6->dst);
/* address should not be used anymore */
break;
case SIXLOWPAN_ND_STATUS_NC_FULL:
DEBUG("6lo nd: neighbor cache on router is full\n");
gnrc_ipv6_nc_remove(iface, &ipv6->src);
/* try to find another router */
gnrc_sixlowpan_nd_init(ipv6_iface);
break;
default:
DEBUG("6lo nd: unknown status for registration received\n");
break;
}
break;
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
case ICMPV6_NBR_SOL:
if (!(ipv6_iface->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) &&
!(ipv6_iface->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER)) {
DEBUG("6lo nd: interface not a 6LoWPAN or forwarding interface\n");
return 0;
}
if ((ar_opt->status != 0) ||
ipv6_addr_is_unspecified(&ipv6->src)) {
/* discard silently */
return 0;
}
/* TODO multihop DAD */
if ((nc_entry != NULL) &&
((gnrc_ipv6_nc_get_type(nc_entry) == GNRC_IPV6_NC_TYPE_REGISTERED) ||
(gnrc_ipv6_nc_get_type(nc_entry) == GNRC_IPV6_NC_TYPE_TENTATIVE)) &&
((nc_entry->eui64.uint64.u64 != 0) &&
(ar_opt->eui64.uint64.u64 != nc_entry->eui64.uint64.u64))) {
/* there is already another node with this address */
DEBUG("6lo nd: duplicate address detected\n");
status = SIXLOWPAN_ND_STATUS_DUP;
}
else if ((nc_entry != NULL) && (ar_opt->ltime.u16 == 0)) {
gnrc_ipv6_nc_remove(iface, &ipv6->src);
/* TODO, notify routing protocol */
}
else if (ar_opt->ltime.u16 != 0) {
/* TODO: multihop DAD behavior */
uint16_t reg_ltime;
if (nc_entry == NULL) {
if ((nc_entry = gnrc_ipv6_nc_add(iface, &ipv6->src, sl2a, sl2a_len,
GNRC_IPV6_NC_STATE_STALE)) == NULL) {
DEBUG("6lo nd: neighbor cache is full\n");
return SIXLOWPAN_ND_STATUS_NC_FULL;
}
nc_entry->eui64 = ar_opt->eui64;
}
nc_entry->flags &= ~GNRC_IPV6_NC_TYPE_MASK;
nc_entry->flags |= GNRC_IPV6_NC_TYPE_REGISTERED;
reg_ltime = byteorder_ntohs(ar_opt->ltime);
/* TODO: notify routing protocol */
vtimer_remove(&nc_entry->type_timeout);
vtimer_set_msg(&nc_entry->type_timeout, timex_set(reg_ltime * 60, 0),
gnrc_ipv6_pid, GNRC_SIXLOWPAN_ND_MSG_AR_TIMEOUT, nc_entry);
}
break;
#endif
default:
break;
}
return status;
}
void gnrc_ndp_rtr_adv_handle(kernel_pid_t iface, gnrc_pktsnip_t *pkt, ipv6_hdr_t *ipv6,
ndp_rtr_adv_t *rtr_adv, size_t icmpv6_size)
{
uint8_t *buf = (uint8_t *)(rtr_adv + 1);
gnrc_ipv6_nc_t *nc_entry = NULL;
gnrc_ipv6_netif_t *if_entry = gnrc_ipv6_netif_get(iface);
uint8_t l2src[GNRC_IPV6_NC_L2_ADDR_MAX];
#ifdef MODULE_GNRC_SIXLOWPAN_ND
uint32_t next_rtr_sol = 0;
#endif
int sicmpv6_size = (int)icmpv6_size, l2src_len = 0;
uint16_t opt_offset = 0;
if (!ipv6_addr_is_link_local(&ipv6->src) ||
ipv6_addr_is_multicast(&ipv6->src) ||
(ipv6->hl != 255) || (rtr_adv->code != 0) ||
(icmpv6_size < sizeof(ndp_rtr_adv_t))) {
DEBUG("ndp: router advertisement was invalid\n");
/* ipv6 releases */
return;
}
/* get source from default router list */
nc_entry = gnrc_ipv6_nc_get(iface, &ipv6->src);
if (nc_entry == NULL) { /* not in default router list */
/* create default router list entry */
nc_entry = gnrc_ipv6_nc_add(iface, &ipv6->src, NULL, 0,
GNRC_IPV6_NC_IS_ROUTER);
if (nc_entry == NULL) {
DEBUG("ndp: error on default router list entry creation\n");
return;
}
}
else if ((nc_entry->flags & GNRC_IPV6_NC_IS_ROUTER) && (byteorder_ntohs(rtr_adv->ltime) == 0)) {
nc_entry->flags &= ~GNRC_IPV6_NC_IS_ROUTER;
}
else {
nc_entry->flags |= GNRC_IPV6_NC_IS_ROUTER;
}
/* set router life timer */
if (rtr_adv->ltime.u16 != 0) {
uint16_t ltime = byteorder_ntohs(rtr_adv->ltime);
#ifdef MODULE_GNRC_SIXLOWPAN_ND
next_rtr_sol = ltime;
#endif
xtimer_set_msg(&nc_entry->rtr_timeout, (ltime * SEC_IN_USEC),
&nc_entry->rtr_timeout_msg, thread_getpid());
}
/* set current hop limit from message if available */
if (rtr_adv->cur_hl != 0) {
if_entry->cur_hl = rtr_adv->cur_hl;
}
/* set flags from message */
if_entry->flags &= ~GNRC_IPV6_NETIF_FLAGS_RTR_ADV_MASK;
if_entry->flags |= (rtr_adv->flags << GNRC_IPV6_NETIF_FLAGS_RTR_ADV_POS) &
GNRC_IPV6_NETIF_FLAGS_RTR_ADV_MASK;
/* set reachable time from message if it is not the same as the random base
* value */
if ((rtr_adv->reach_time.u32 != 0) &&
(if_entry->reach_time_base != byteorder_ntohl(rtr_adv->reach_time))) {
_set_reach_time(if_entry, byteorder_ntohl(rtr_adv->reach_time));
}
/* set retransmission timer from message */
if (rtr_adv->retrans_timer.u32 != 0) {
if_entry->retrans_timer = timex_set(0, byteorder_ntohl(rtr_adv->retrans_timer));
timex_normalize(&if_entry->retrans_timer);
}
mutex_unlock(&if_entry->mutex);
sicmpv6_size -= sizeof(ndp_rtr_adv_t);
/* parse options */
while (sicmpv6_size > 0) {
ndp_opt_t *opt = (ndp_opt_t *)(buf + opt_offset);
switch (opt->type) {
case NDP_OPT_SL2A:
if ((l2src_len = gnrc_ndp_internal_sl2a_opt_handle(pkt, ipv6, rtr_adv->type, opt,
l2src)) < 0) {
/* -ENOTSUP can not happen */
/* invalid source link-layer address option */
return;
}
break;
case NDP_OPT_MTU:
if (!gnrc_ndp_internal_mtu_opt_handle(iface, rtr_adv->type, (ndp_opt_mtu_t *)opt)) {
/* invalid MTU option */
return;
}
break;
case NDP_OPT_PI:
if (!gnrc_ndp_internal_pi_opt_handle(iface, rtr_adv->type, (ndp_opt_pi_t *)opt)) {
/* invalid prefix information option */
return;
}
#ifdef MODULE_GNRC_SIXLOWPAN_ND
uint32_t valid_ltime = byteorder_ntohl(((ndp_opt_pi_t *)opt)->valid_ltime);
if ((valid_ltime != 0) && (valid_ltime < next_rtr_sol)) {
next_rtr_sol = valid_ltime;
}
#endif
break;
#ifdef MODULE_GNRC_SIXLOWPAN_ND
case NDP_OPT_6CTX:
if (!gnrc_sixlowpan_nd_opt_6ctx_handle(rtr_adv->type,
(sixlowpan_nd_opt_6ctx_t *)opt)) {
/* invalid 6LoWPAN context option */
return;
}
uint16_t ltime = byteorder_ntohs(((sixlowpan_nd_opt_6ctx_t *)opt)->ltime);
if ((ltime != 0) && (ltime < (next_rtr_sol / 60))) {
next_rtr_sol = ltime * 60;
}
break;
#endif
#ifdef MODULE_GNRC_SIXLOWPAN_ND_ROUTER
case NDP_OPT_ABR:
gnrc_sixlowpan_nd_opt_abr_handle(iface, rtr_adv, icmpv6_size,
(sixlowpan_nd_opt_abr_t *)opt);
break;
#endif
}
opt_offset += (opt->len * 8);
sicmpv6_size -= (opt->len * 8);
#if ENABLE_DEBUG
if (sicmpv6_size < 0) {
DEBUG("ndp: Option parsing out of sync.\n");
}
#endif
}
#if ENABLE_DEBUG && defined(MODULE_GNRC_SIXLOWPAN_ND)
if ((if_entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) && (l2src_len <= 0)) {
DEBUG("ndp: Router advertisement did not contain any source address information\n");
}
#endif
_stale_nc(iface, &ipv6->src, l2src, l2src_len);
/* stop multicast router solicitation retransmission timer */
xtimer_remove(&if_entry->rtr_sol_timer);
#ifdef MODULE_GNRC_SIXLOWPAN_ND
if (if_entry->flags & GNRC_IPV6_NETIF_FLAGS_SIXLOWPAN) {
/* 3/4 of the time should be "well before" enough the respective timeout
* not to run out; see https://tools.ietf.org/html/rfc6775#section-5.4.3 */
next_rtr_sol *= 3;
next_rtr_sol = (next_rtr_sol > 4) ? (next_rtr_sol >> 2) : 1;
/* according to https://tools.ietf.org/html/rfc6775#section-5.3:
* "In all cases, the RS retransmissions are terminated when an RA is
* received."
* Hence, reset router solicitation counter and reset timer. */
if_entry->rtr_sol_count = 0;
gnrc_sixlowpan_nd_rtr_sol_reschedule(nc_entry, next_rtr_sol);
gnrc_ndp_internal_send_nbr_sol(nc_entry->iface, NULL, &nc_entry->ipv6_addr,
&nc_entry->ipv6_addr);
if (if_entry->flags & GNRC_IPV6_NETIF_FLAGS_ROUTER) {
gnrc_ipv6_netif_set_rtr_adv(if_entry, true);
}
}
static void test_ipv6_nc_add__address_NULL(void)
{
TEST_ASSERT_NULL(gnrc_ipv6_nc_add(DEFAULT_TEST_NETIF, NULL, TEST_STRING4,
sizeof(TEST_STRING4), 0));
}