void _auto_configure_addr(gnrc_netif_t *netif, const ipv6_addr_t *pfx,
uint8_t pfx_len)
{
ipv6_addr_t addr = IPV6_ADDR_UNSPECIFIED;
int idx;
uint8_t flags = GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_TENTATIVE;
if (!(netif->flags & GNRC_NETIF_FLAGS_HAS_L2ADDR)) {
DEBUG("nib: interface %i has no link-layer addresses\n", netif->pid);
return;
}
DEBUG("nib: add address based on %s/%u automatically to interface %u\n",
ipv6_addr_to_str(addr_str, pfx, sizeof(addr_str)),
pfx_len, netif->pid);
#if GNRC_IPV6_NIB_CONF_6LN
bool new_address = false;
#endif /* GNRC_IPV6_NIB_CONF_6LN */
gnrc_netif_ipv6_get_iid(netif, (eui64_t *)&addr.u64[1]);
ipv6_addr_init_prefix(&addr, pfx, pfx_len);
if ((idx = gnrc_netif_ipv6_addr_idx(netif, &addr)) < 0) {
if ((idx = gnrc_netif_ipv6_addr_add_internal(netif, &addr, pfx_len,
flags)) < 0) {
DEBUG("nib: Can't add link-local address on interface %u\n",
netif->pid);
return;
}
#if GNRC_IPV6_NIB_CONF_6LN
new_address = true;
#endif /* GNRC_IPV6_NIB_CONF_6LN */
}
#if GNRC_IPV6_NIB_CONF_6LN
/* mark link-local addresses as valid on 6LN */
if (gnrc_netif_is_6ln(netif) && ipv6_addr_is_link_local(pfx)) {
/* don't do this beforehand or risk a deadlock:
* - gnrc_netif_ipv6_addr_add_internal() adds VALID (i.e. manually configured
* addresses to the prefix list locking the NIB's mutex which is already
* locked here) */
netif->ipv6.addrs_flags[idx] &= ~GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_MASK;
netif->ipv6.addrs_flags[idx] |= GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_VALID;
}
#endif /* GNRC_IPV6_NIB_CONF_6LN */
#if GNRC_IPV6_NIB_CONF_6LN
if (new_address && gnrc_netif_is_6ln(netif) &&
!gnrc_netif_is_6lbr(netif)) {
_handle_rereg_address(&netif->ipv6.addrs[idx]);
}
#else /* GNRC_IPV6_NIB_CONF_6LN */
(void)idx;
#endif /* GNRC_IPV6_NIB_CONF_6LN */
}
uint8_t _handle_aro(gnrc_netif_t *netif, const ipv6_hdr_t *ipv6,
const icmpv6_hdr_t *icmpv6,
const sixlowpan_nd_opt_ar_t *aro, const ndp_opt_t *sl2ao,
_nib_onl_entry_t *nce)
{
assert(netif != NULL);
if (gnrc_netif_is_6ln(netif) && (aro->len == SIXLOWPAN_ND_OPT_AR_LEN)) {
DEBUG("nib: valid ARO received\n");
DEBUG(" - length: %u\n", aro->len);
DEBUG(" - status: %u\n", aro->status);
DEBUG(" - registration lifetime: %u\n", byteorder_ntohs(aro->ltime));
DEBUG(" - EUI-64: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
aro->eui64.uint8[0], aro->eui64.uint8[1], aro->eui64.uint8[2],
aro->eui64.uint8[3], aro->eui64.uint8[4], aro->eui64.uint8[5],
aro->eui64.uint8[6], aro->eui64.uint8[7]);
if (icmpv6->type == ICMPV6_NBR_ADV) {
if (!_is_iface_eui64(netif, &aro->eui64)) {
DEBUG("nib: ARO EUI-64 is not mine, ignoring ARO\n");
return _ADDR_REG_STATUS_IGNORE;
}
switch (aro->status) {
case SIXLOWPAN_ND_STATUS_SUCCESS: {
uint16_t ltime = byteorder_ntohs(aro->ltime);
uint32_t rereg_time;
int idx = gnrc_netif_ipv6_addr_idx(netif, &ipv6->dst);
/* if ltime 1min, reschedule NS in 30sec, otherwise 1min
* before timeout */
rereg_time = (ltime == 1U) ? (30 * MS_PER_SEC) :
(ltime - 1U) * SEC_PER_MIN * MS_PER_SEC;
DEBUG("nib: Address registration of %s successful. "
"Scheduling re-registration in %" PRIu32 "ms\n",
ipv6_addr_to_str(addr_str, &ipv6->dst,
sizeof(addr_str)), rereg_time);
netif->ipv6.addrs_flags[idx] &= ~GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_MASK;
netif->ipv6.addrs_flags[idx] |= GNRC_NETIF_IPV6_ADDRS_FLAGS_STATE_VALID;
_evtimer_add(&netif->ipv6.addrs[idx],
GNRC_IPV6_NIB_REREG_ADDRESS,
&netif->ipv6.addrs_timers[idx],
rereg_time);
break;
}
case SIXLOWPAN_ND_STATUS_DUP:
DEBUG("nib: Address registration reports duplicate. "
"Removing address %s%%%u\n",
ipv6_addr_to_str(addr_str,
&ipv6->dst,
sizeof(addr_str)), netif->pid);
gnrc_netif_ipv6_addr_remove_internal(netif, &ipv6->dst);
/* TODO: generate new address */
break;
case SIXLOWPAN_ND_STATUS_NC_FULL: {
DEBUG("nib: Router's neighbor cache is full. "
"Searching new router for DAD\n");
_nib_dr_entry_t *dr = _nib_drl_get(&ipv6->src, netif->pid);
assert(dr != NULL); /* otherwise we wouldn't be here */
_nib_drl_remove(dr);
if (_nib_drl_iter(NULL) == NULL) { /* no DRL left */
netif->ipv6.rs_sent = 0;
/* search (hopefully) new router */
_handle_search_rtr(netif);
}
else {
assert(dr->next_hop != NULL);
_handle_rereg_address(&ipv6->dst);
}
}
break;
}
return aro->status;
}
#if GNRC_IPV6_NIB_CONF_6LR
else if (gnrc_netif_is_6lr(netif) &&
(icmpv6->type == ICMPV6_NBR_SOL)) {
return _reg_addr_upstream(netif, ipv6, icmpv6, aro, sl2ao, nce);
}
#else /* GNRC_IPV6_NIB_CONF_6LR */
(void)sl2ao;
(void)nce;
#endif /* GNRC_IPV6_NIB_CONF_6LR */
}
#if ENABLE_DEBUG
else if (aro->len != SIXLOWPAN_ND_OPT_AR_LEN) {
DEBUG("nib: ARO of unexpected length %u, ignoring ARO\n", aro->len);
}
#endif /* ENABLE_DEBUG */
return _ADDR_REG_STATUS_IGNORE;
}
