void ng_ndp_retrans_nbr_sol(ng_ipv6_nc_t *nc_entry)
{
if ((ng_ipv6_nc_get_state(nc_entry) == NG_IPV6_NC_STATE_INCOMPLETE) ||
(ng_ipv6_nc_get_state(nc_entry) == NG_IPV6_NC_STATE_PROBE)) {
if (nc_entry->probes_remaining > 1) {
ng_ipv6_addr_t dst;
DEBUG("ndp: Retransmit neighbor solicitation for %s\n",
ng_ipv6_addr_to_str(addr_str, &nc_entry->ipv6_addr, sizeof(addr_str)));
/* retransmit neighbor solicatation */
if (ng_ipv6_nc_get_state(nc_entry) == NG_IPV6_NC_STATE_INCOMPLETE) {
ng_ipv6_addr_set_solicited_nodes(&dst, &nc_entry->ipv6_addr);
}
else {
dst.u64[0] = nc_entry->ipv6_addr.u64[0];
dst.u64[1] = nc_entry->ipv6_addr.u64[1];
}
nc_entry->probes_remaining--;
if (nc_entry->iface == KERNEL_PID_UNDEF) {
timex_t t = { 0, NG_NDP_RETRANS_TIMER };
kernel_pid_t ifs[NG_NETIF_NUMOF];
size_t ifnum = ng_netif_get(ifs);
for (size_t i = 0; i < ifnum; i++) {
_send_nbr_sol(ifs[i], &nc_entry->ipv6_addr, &dst);
}
vtimer_remove(&nc_entry->nbr_sol_timer);
vtimer_set_msg(&nc_entry->nbr_sol_timer, t, ng_ipv6_pid,
NG_NDP_MSG_NBR_SOL_RETRANS, nc_entry);
}
else {
ng_ipv6_netif_t *ipv6_iface = ng_ipv6_netif_get(nc_entry->iface);
_send_nbr_sol(nc_entry->iface, &nc_entry->ipv6_addr, &dst);
mutex_lock(&ipv6_iface->mutex);
vtimer_remove(&nc_entry->nbr_sol_timer);
vtimer_set_msg(&nc_entry->nbr_sol_timer,
ipv6_iface->retrans_timer, ng_ipv6_pid,
NG_NDP_MSG_NBR_SOL_RETRANS, nc_entry);
mutex_unlock(&ipv6_iface->mutex);
}
}
else if (nc_entry->probes_remaining <= 1) {
DEBUG("ndp: Remove nc entry %s for interface %" PRIkernel_pid "\n",
ng_ipv6_addr_to_str(addr_str, &nc_entry->ipv6_addr, sizeof(addr_str)),
nc_entry->iface);
#ifdef MODULE_FIB
fib_remove_entry((uint8_t *) & (nc_entry->ipv6_addr), sizeof(ng_ipv6_addr_t));
#endif
ng_ipv6_nc_remove(nc_entry->iface, &nc_entry->ipv6_addr);
}
}
}
static void test_ipv6_nc_remove__success(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
test_ipv6_nc_add__success(); /* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF */
TEST_ASSERT_NOT_NULL(ng_ipv6_nc_get(DEFAULT_TEST_NETIF, &addr));
ng_ipv6_nc_remove(DEFAULT_TEST_NETIF, &addr);
TEST_ASSERT_NULL(ng_ipv6_nc_get(DEFAULT_TEST_NETIF, &addr));
}
static void test_ipv6_nc_remove__no_entry_addr2(void)
{
ipv6_addr_t addr = IPV6_ADDR_UNSPECIFIED;
ipv6_addr_t exp_addr = DEFAULT_TEST_IPV6_ADDR;
test_ipv6_nc_add__success(); /* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF */
ng_ipv6_nc_remove(DEFAULT_TEST_NETIF, &addr);
TEST_ASSERT_NOT_NULL(ng_ipv6_nc_get(DEFAULT_TEST_NETIF, &exp_addr));
TEST_ASSERT_NULL(ng_ipv6_nc_get(DEFAULT_TEST_NETIF, &addr));
}
static int _ipv6_nc_reset(void)
{
ng_ipv6_nc_t *tmp = NULL;
for (ng_ipv6_nc_t *entry = ng_ipv6_nc_get_next(NULL);
entry != NULL;
tmp = entry, entry = ng_ipv6_nc_get_next(entry)) {
if (tmp) {
ng_ipv6_nc_remove(tmp->iface, &tmp->ipv6_addr);
}
}
/* remove last entry */
if (tmp) {
ng_ipv6_nc_remove(tmp->iface, &tmp->ipv6_addr);
}
printf("success: reset neighbor cache\n");
return 0;
}
static int _ipv6_nc_del(char *ipv6_addr_str)
{
ipv6_addr_t ipv6_addr;
if (ipv6_addr_from_str(&ipv6_addr, ipv6_addr_str) == NULL) {
puts("error: unable to parse IPv6 address.");
return 1;
}
ng_ipv6_nc_remove(KERNEL_PID_UNDEF, &ipv6_addr);
printf("success: removed %s from neighbor cache\n", ipv6_addr_str);
return 0;
}
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;
ng_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(ng_ipv6_nc_add(DEFAULT_TEST_NETIF, &addr2, TEST_STRING8,
sizeof(TEST_STRING8) - 2, 0));
TEST_ASSERT_NOT_NULL((exp_entry = ng_ipv6_nc_get(DEFAULT_TEST_NETIF, &addr2)));
ng_ipv6_nc_remove(DEFAULT_TEST_NETIF, &addr1);
TEST_ASSERT_NOT_NULL((entry = ng_ipv6_nc_get_next(NULL)));
TEST_ASSERT_NOT_NULL((entry = ng_ipv6_nc_get_next(entry)));
TEST_ASSERT(exp_entry == entry);
TEST_ASSERT_NULL(ng_ipv6_nc_get_next(entry));
}
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;
ng_ipv6_nc_t *entry1, *entry2;
TEST_ASSERT_NOT_NULL(ng_ipv6_nc_add(OTHER_TEST_NETIF, &other_addr,
TEST_STRING4, sizeof(TEST_STRING4),
0));
TEST_ASSERT_NOT_NULL((entry1 = ng_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 */
ng_ipv6_nc_remove(OTHER_TEST_NETIF, &other_addr);
TEST_ASSERT_NOT_NULL((entry2 = ng_ipv6_nc_add(DEFAULT_TEST_NETIF, &default_addr,
TEST_STRING4, sizeof(TEST_STRING4),
0)));
TEST_ASSERT(entry1 == entry2);
}
