static void test_ipv6_nc_still_reachable__incomplete(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
ng_ipv6_nc_t *entry = NULL;
/* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF and sets flags to
* (NG_IPV6_NC_STATE_INCOMPLETE << NG_IPV6_NC_STATE_POS) */
test_ipv6_nc_is_reachable__incomplete();
TEST_ASSERT_NOT_NULL((entry = ng_ipv6_nc_get(KERNEL_PID_UNDEF, &addr)));
TEST_ASSERT(!ng_ipv6_nc_is_reachable(entry));
TEST_ASSERT_NOT_NULL(ng_ipv6_nc_still_reachable(&addr));
TEST_ASSERT(!ng_ipv6_nc_is_reachable(entry));
}
static void test_ipv6_nc_still_reachable__success(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
ng_ipv6_nc_t *entry = NULL;
/* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF and sets flags to
* (NG_IPV6_NC_STATE_REACHABLE << NG_IPV6_NC_STATE_POS) */
test_ipv6_nc_is_reachable__reachable();
TEST_ASSERT_NOT_NULL((entry = ng_ipv6_nc_get(KERNEL_PID_UNDEF, &addr)));
TEST_ASSERT(ng_ipv6_nc_is_reachable(entry));
entry->flags = (NG_IPV6_NC_STATE_STALE << NG_IPV6_NC_STATE_POS);
TEST_ASSERT_NOT_NULL(ng_ipv6_nc_still_reachable(&addr));
TEST_ASSERT(ng_ipv6_nc_is_reachable(entry));
}
static void test_ipv6_nc_is_reachable__reachable(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
ng_ipv6_nc_t *entry = NULL;
test_ipv6_nc_add__success(); /* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF */
TEST_ASSERT_NOT_NULL((entry = ng_ipv6_nc_get(DEFAULT_TEST_NETIF, &addr)));
entry->flags = (NG_IPV6_NC_STATE_REACHABLE << NG_IPV6_NC_STATE_POS);
TEST_ASSERT(ng_ipv6_nc_is_reachable(entry));
}
static void test_ipv6_nc_is_reachable__incomplete(void)
{
ipv6_addr_t addr = DEFAULT_TEST_IPV6_ADDR;
ng_ipv6_nc_t *entry = NULL;
test_ipv6_nc_add__success(); /* adds DEFAULT_TEST_IPV6_ADDR to DEFAULT_TEST_NETIF */
TEST_ASSERT_NOT_NULL((entry = ng_ipv6_nc_get(KERNEL_PID_UNDEF, &addr)));
entry->flags = (NG_IPV6_NC_STATE_INCOMPLETE << NG_IPV6_NC_STATE_POS);
TEST_ASSERT(!ng_ipv6_nc_is_reachable(entry));
}
kernel_pid_t ng_ndp_next_hop_l2addr(uint8_t *l2addr, uint8_t *l2addr_len,
kernel_pid_t iface, ng_ipv6_addr_t *dst,
ng_pktsnip_t *pkt)
{
ng_ipv6_addr_t *next_hop_ip = NULL, *prefix = NULL;
#ifdef MODULE_NG_IPV6_EXT_RH
next_hop_ip = ng_ipv6_ext_rh_next_hop(hdr);
#endif
#ifdef MODULE_FIB
size_t next_hop_size = sizeof(ng_ipv6_addr_t);
uint32_t next_hop_flags = 0;
ng_ipv6_addr_t next_hop_actual; /* FIB copies address into this variable */
if ((next_hop_ip == NULL) &&
(fib_get_next_hop(&iface, next_hop_actual.u8, &next_hop_size,
&next_hop_flags, (uint8_t *)dst,
sizeof(ng_ipv6_addr_t), 0) >= 0) &&
(next_hop_size == sizeof(ng_ipv6_addr_t))) {
next_hop_ip = &next_hop_actual;
}
#endif
if (next_hop_ip == NULL) { /* no route to host */
if (iface == KERNEL_PID_UNDEF) {
/* ng_ipv6_netif_t doubles as prefix list */
iface = ng_ipv6_netif_find_by_prefix(&prefix, dst);
}
else {
/* ng_ipv6_netif_t doubles as prefix list */
prefix = ng_ipv6_netif_match_prefix(iface, dst);
}
if ((prefix != NULL) && /* prefix is on-link */
(ng_ipv6_netif_addr_get(prefix)->flags &
NG_IPV6_NETIF_ADDR_FLAGS_NDP_ON_LINK)) {
next_hop_ip = dst;
#ifdef MODULE_FIB
/* We don't care if FIB is full, this is just for efficiency
* for later sends */
fib_add_entry(iface, (uint8_t *)dst, sizeof(ng_ipv6_addr_t), 0,
(uint8_t *)next_hop_ip, sizeof(ng_ipv6_addr_t), 0,
FIB_LIFETIME_NO_EXPIRE);
#endif
}
}
if (next_hop_ip == NULL) {
next_hop_ip = _default_router();
#ifdef MODULE_FIB
/* We don't care if FIB is full, this is just for efficiency for later
* sends */
fib_add_entry(iface, (uint8_t *)dst, sizeof(ng_ipv6_addr_t), 0,
(uint8_t *)next_hop_ip, sizeof(ng_ipv6_addr_t), 0,
FIB_LIFETIME_NO_EXPIRE);
#endif
}
if (next_hop_ip != NULL) {
ng_ipv6_nc_t *nc_entry = ng_ipv6_nc_get(iface, next_hop_ip);
if ((nc_entry != NULL) && ng_ipv6_nc_is_reachable(nc_entry)) {
DEBUG("ndp: found reachable neighbor (%s => ",
ng_ipv6_addr_to_str(addr_str, &nc_entry->ipv6_addr, sizeof(addr_str)));
DEBUG("%s)\n",
ng_netif_addr_to_str(addr_str, sizeof(addr_str),
nc_entry->l2_addr, nc_entry->l2_addr_len));
if (ng_ipv6_nc_get_state(nc_entry) == NG_IPV6_NC_STATE_STALE) {
_set_state(nc_entry, NG_IPV6_NC_STATE_DELAY);
}
memcpy(l2addr, nc_entry->l2_addr, nc_entry->l2_addr_len);
*l2addr_len = nc_entry->l2_addr_len;
/* TODO: unreachability check */
return nc_entry->iface;
}
else if (nc_entry == NULL) {
ng_pktqueue_t *pkt_node;
ng_ipv6_addr_t dst_sol;
nc_entry = ng_ipv6_nc_add(iface, next_hop_ip, NULL, 0,
NG_IPV6_NC_STATE_INCOMPLETE << NG_IPV6_NC_STATE_POS);
if (nc_entry == NULL) {
DEBUG("ndp: could not create neighbor cache entry\n");
return KERNEL_PID_UNDEF;
}
pkt_node = _alloc_pkt_node(pkt);
if (pkt_node == NULL) {
DEBUG("ndp: could not add packet to packet queue\n");
}
else {
/* prevent packet from being released by IPv6 */
ng_pktbuf_hold(pkt_node->pkt, 1);
ng_pktqueue_add(&nc_entry->pkts, pkt_node);
}
/* address resolution */
ng_ipv6_addr_set_solicited_nodes(&dst_sol, next_hop_ip);
if (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], next_hop_ip, &dst_sol);
}
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(iface);
_send_nbr_sol(iface, next_hop_ip, &dst_sol);
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);
}
}
}
return KERNEL_PID_UNDEF;
}
