static int _get_netif_state(gnrc_netif_t **netif, const ipv6_addr_t *addr)
{
*netif = gnrc_netif_get_by_ipv6_addr(addr);
if (*netif != NULL) {
int idx;
gnrc_netif_acquire(*netif);
idx = gnrc_netif_ipv6_addr_idx(*netif, addr);
return ((idx >= 0) && gnrc_netif_ipv6_addr_dad_trans(*netif, idx)) ?
idx : -1;
}
return -1;
}
void _handle_rereg_address(const ipv6_addr_t *addr)
{
gnrc_netif_t *netif = gnrc_netif_get_by_ipv6_addr(addr);
_nib_dr_entry_t *router = _nib_drl_get_dr();
const bool router_reachable = (router != NULL) &&
_is_reachable(router->next_hop);
if (router_reachable && (netif != NULL)) {
assert((unsigned)netif->pid == _nib_onl_get_if(router->next_hop));
DEBUG("nib: Re-registering %s",
ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)));
DEBUG(" with upstream router %s\n",
ipv6_addr_to_str(addr_str, &router->next_hop->ipv6,
sizeof(addr_str)));
_snd_ns(&router->next_hop->ipv6, netif, addr, &router->next_hop->ipv6);
}
else {
DEBUG("nib: Couldn't re-register %s, no current router found or address "
"wasn't assigned to any interface anymore.\n",
ipv6_addr_to_str(addr_str, addr, sizeof(addr_str)));
}
if (netif != NULL) {
int idx = gnrc_netif_ipv6_addr_idx(netif, addr);
if (router_reachable &&
(_is_valid(netif, idx) || (_is_tentative(netif, idx) &&
(gnrc_netif_ipv6_addr_dad_trans(netif, idx) <
SIXLOWPAN_ND_REG_TRANSMIT_NUMOF)))) {
uint32_t retrans_time;
if (_is_valid(netif, idx)) {
retrans_time = SIXLOWPAN_ND_MAX_RS_SEC_INTERVAL * MS_PER_SEC;
}
else {
retrans_time = netif->ipv6.retrans_time;
/* increment encoded retransmission count */
netif->ipv6.addrs_flags[idx]++;
}
_evtimer_add(&netif->ipv6.addrs[idx], GNRC_IPV6_NIB_REREG_ADDRESS,
&netif->ipv6.addrs_timers[idx], retrans_time);
}
else {
netif->ipv6.rs_sent = 0;
_handle_search_rtr(netif);
}
}
}
