C++ (Cpp) ng_sixlowpan_frag_handle_pkt Examples

Example #1

File: ng_sixlowpan.c Project: jferreir/RIOT

static void _receive(ng_pktsnip_t *pkt)
{
    ng_pktsnip_t *payload;
    uint8_t *dispatch;

    /* seize payload as a temporary variable */
    payload = ng_pktbuf_start_write(pkt);   /* need to duplicate since pkt->next
                                             * might get replaced */

    if (payload == NULL) {
        DEBUG("6lo: can not get write access on received packet\n");
#if defined(DEVELHELP) && defined(ENABLE_DEBUG)
        ng_pktbuf_stats();
#endif
        ng_pktbuf_release(pkt);
        return;
    }

    pkt = payload;  /* reset pkt from temporary variable */

    LL_SEARCH_SCALAR(pkt, payload, type, NG_NETTYPE_SIXLOWPAN);

    if ((payload == NULL) || (payload->size < 1)) {
        DEBUG("6lo: Received packet has no 6LoWPAN payload\n");
        ng_pktbuf_release(pkt);
        return;
    }

    dispatch = payload->data;

    if (dispatch[0] == NG_SIXLOWPAN_UNCOMPRESSED) {
        ng_pktsnip_t *sixlowpan;
        DEBUG("6lo: received uncompressed IPv6 packet\n");
        payload = ng_pktbuf_start_write(payload);

        if (payload == NULL) {
            DEBUG("6lo: can not get write access on received packet\n");
#if defined(DEVELHELP) && defined(ENABLE_DEBUG)
            ng_pktbuf_stats();
#endif
            ng_pktbuf_release(pkt);
            return;
        }

        /* packet is uncompressed: just mark and remove the dispatch */
        sixlowpan = ng_pktbuf_add(payload, payload->data, sizeof(uint8_t),
                                  NG_NETTYPE_SIXLOWPAN);

        if (sixlowpan == NULL) {
            DEBUG("6lo: can not mark 6LoWPAN dispatch\n");
            ng_pktbuf_release(pkt);
            return;
        }

        pkt = ng_pktbuf_remove_snip(pkt, sixlowpan);
    }
#ifdef MODULE_NG_SIXLOWPAN_FRAG
    else if (ng_sixlowpan_frag_is((ng_sixlowpan_frag_t *)dispatch)) {
        DEBUG("6lo: received 6LoWPAN fragment\n");
        ng_sixlowpan_frag_handle_pkt(pkt);
        return;
    }
#endif
    else {
        DEBUG("6lo: dispatch %02x ... is not supported\n",
              dispatch[0]);
        ng_pktbuf_release(pkt);
        return;
    }

#ifdef MODULE_NG_SIXLOWPAN_IPHC
    if (ng_sixlowpan_iphc_is(payload->data)) {
        if (!ng_sixlowpan_iphc_decode(pkt)) {
            DEBUG("6lo: error on IPHC decoding\n");
            ng_pktbuf_release(pkt);
            return;
        }
        LL_SEARCH_SCALAR(pkt, payload, type, NG_NETTYPE_IPV6);

    }
#endif

    payload->type = NG_NETTYPE_IPV6;

    if (!ng_netapi_dispatch_receive(NG_NETTYPE_IPV6, NG_NETREG_DEMUX_CTX_ALL, pkt)) {
        DEBUG("ipv6: No receivers for this packet found\n");
        ng_pktbuf_release(pkt);
    }
}

Example #2

File: ng_sixlowpan.c Project: femtoio/RIOT

void _receive(ng_pktsnip_t *pkt)
{
    ng_pktsnip_t *payload;
    uint8_t *dispatch;
    ng_netreg_entry_t *entry;

    LL_SEARCH_SCALAR(pkt, payload, type, NG_NETTYPE_SIXLOWPAN);

    if ((payload == NULL) || (payload->size < 1)) {
        DEBUG("6lo: Received packet has no 6LoWPAN payload\n");
        ng_pktbuf_release(pkt);
    }

    dispatch = payload->data;

    if (dispatch[0] == NG_SIXLOWPAN_UNCOMPRESSED) {
        ng_pktsnip_t *sixlowpan;
        DEBUG("6lo: received uncompressed IPv6 packet\n");
        payload = ng_pktbuf_start_write(payload);

        if (payload == NULL) {
            DEBUG("6lo: can not get write access on received packet\n");
#if defined(DEVELHELP) && defined(ENABLE_DEBUG)
            ng_pktbuf_stats();
#endif
            ng_pktbuf_release(pkt);
            return;
        }

        /* packet is uncompressed: just mark and remove the dispatch */
        sixlowpan = ng_pktbuf_add(payload, payload->data, sizeof(uint8_t),
                                  NG_NETTYPE_SIXLOWPAN);
        LL_DELETE(pkt, sixlowpan);
        ng_pktbuf_release(sixlowpan);
    }
#ifdef MODULE_NG_SIXLOWPAN_FRAG
    else if (ng_sixlowpan_frag_is((ng_sixlowpan_frag_t *)dispatch)) {
        DEBUG("6lo: received 6LoWPAN fragment\n");
        ng_sixlowpan_frag_handle_pkt(pkt);
    }
#endif
    else {
        DEBUG("6lo: dispatch %02x ... is not supported\n",
              dispatch[0]);
        ng_pktbuf_release(pkt);
        return;
    }

    payload->type = NG_NETTYPE_IPV6;

    entry = ng_netreg_lookup(NG_NETTYPE_IPV6, NG_NETREG_DEMUX_CTX_ALL);

    if (entry == NULL) {
        DEBUG("ipv6: No receivers for this packet found\n");
        ng_pktbuf_release(pkt);
        return;
    }

    ng_pktbuf_hold(pkt, ng_netreg_num(NG_NETTYPE_IPV6, NG_NETREG_DEMUX_CTX_ALL) - 1);

    while (entry) {
        DEBUG("6lo: Send receive command for %p to %" PRIu16 "\n",
              (void *)pkt, entry->pid);
        ng_netapi_receive(entry->pid, pkt);
        entry = ng_netreg_getnext(entry);
    }
}