_nib-6ln.h

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/*
 * SPDX-FileCopyrightText: 2017 Freie Universität Berlin
 * SPDX-License-Identifier: LGPL-2.1-only
 */
 
#pragma once

 
#include <kernel_defines.h>
#include <stdint.h>
 
#include "net/gnrc/ipv6/nib/conf.h"
#include "net/sixlowpan/nd.h"
#include "timex.h"
#include "evtimer.h"
 
#include "_nib-arsm.h"
#include "_nib-internal.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define _ADDR_REG_STATUS_TENTATIVE      (3)

#define _ADDR_REG_STATUS_IGNORE         (4)

#define _ADDR_REG_STATUS_UNAVAIL        (255)
 
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_6LN) || defined(DOXYGEN)
bool _resolve_addr_from_ipv6(const ipv6_addr_t *dst, gnrc_netif_t *netif,
                             gnrc_ipv6_nib_nc_t *nce);

int _build_ll_ipv6_from_addr(gnrc_netif_t *netif, const uint8_t *l2addr,
                             uint8_t l2addr_len, ipv6_addr_t *ipv6addr);

static inline uint32_t _get_next_rs_interval(const gnrc_netif_t *netif)
{
    if (gnrc_netif_is_6ln(netif)) {
        if (netif->ipv6.rs_sent < SIXLOWPAN_ND_MAX_RS_NUMOF) {
            return SIXLOWPAN_ND_RS_MSEC_INTERVAL;
        }
        else {
            unsigned exp = netif->ipv6.rs_sent - SIXLOWPAN_ND_MAX_RS_NUMOF;
            uint32_t tmp = SIXLOWPAN_ND_RS_MSEC_INTERVAL +
                           ((1 << exp) * (NDP_RS_MS_INTERVAL));
 
            if (tmp > (SIXLOWPAN_ND_MAX_RS_SEC_INTERVAL * MS_PER_SEC)) {
                tmp = SIXLOWPAN_ND_MAX_RS_SEC_INTERVAL * MS_PER_SEC;
            }
            return tmp;
        }
    }
    else {
        return NDP_RS_MS_INTERVAL;
    }
}

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);

void _handle_rereg_address(const ipv6_addr_t *addr);
 
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C) || defined(DOXYGEN)
_nib_abr_entry_t *_handle_abro(const sixlowpan_nd_opt_abr_t *abro);
uint32_t _handle_6co(const icmpv6_hdr_t *icmpv6,
                     const sixlowpan_nd_opt_6ctx_t *sixco,
                     _nib_abr_entry_t *abr);
#else   /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C || defined(DOXYGEN) */
uint32_t _handle_6co(const icmpv6_hdr_t *icmpv6,
                     const sixlowpan_nd_opt_6ctx_t *sixco);
#endif  /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C || defined(DOXYGEN) */
#else   /* CONFIG_GNRC_IPV6_NIB_6LN || defined(DOXYGEN) */
#define _resolve_addr_from_ipv6(dst, netif, nce)    (false)
#define _build_ll_ipv6_from_addr(netif, l2addr, l2addr_len, ipv6addr)    (-ENOTSUP)
/* _handle_aro() doesn't make sense without 6LR so don't even use it
 * => throw error in case it is compiled in => don't define it here as NOP macro
 */
#define _get_next_rs_interval(netif)                (NDP_RS_MS_INTERVAL)
#define _handle_rereg_address(netif)                (void)netif
#if IS_ACTIVE(CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C) || defined(DOXYGEN)
#define _handle_abro(abro)                          (NULL)
#define _handle_6co(icmpv6, sixco, abr)             (UINT32_MAX)
#else   /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C || defined(DOXYGEN) */
#define _handle_6co(icmpv6, sixco)                  (UINT32_MAX)
#endif  /* CONFIG_GNRC_IPV6_NIB_MULTIHOP_P6C || defined(DOXYGEN) */
#endif  /* CONFIG_GNRC_IPV6_NIB_6LN || defined(DOXYGEN) */
 
#ifdef __cplusplus
}
#endif