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Merge pull request #4446 from Yonezawa-T2/neighbor_discovery_option_for_6lowpan

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gnrc_ndp: fixed ND Option handling for 6LoWPAN
This commit is contained in:
Martine Lenders 2016-01-06 14:03:43 +01:00
commit a4a8e83ac7
1 changed files with 35 additions and 0 deletions
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35
sys/net/gnrc/network_layer/ndp/internal/gnrc_ndp_internal.c
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@ -601,6 +601,24 @@ int gnrc_ndp_internal_sl2a_opt_handle(gnrc_pktsnip_t *pkt, ipv6_hdr_t *ipv6, uin
pkt = pkt->next;
}
#ifdef MODULE_GNRC_SIXLOWPAN_ND
if ((sl2a_len == 2) || (sl2a_len == 8)) {
/* The link-layer seems to be IEEE 802.15.4.
* Determining address length from the option length:
* https://tools.ietf.org/html/rfc4944#section-8 */
if (sl2a_opt->len == 1) {
sl2a_len = 2;
}
else if (sl2a_opt->len == 2) {
sl2a_len = 8;
}
else {
DEBUG("ndp: invalid source link-layer address option received\n");
return -EINVAL;
}
}
#endif
DEBUG("ndp: received SL2A (link-layer address: %s)\n",
gnrc_netif_addr_to_str(addr_str, sizeof(addr_str), sl2a, sl2a_len));
@ -647,6 +665,23 @@ int gnrc_ndp_internal_tl2a_opt_handle(gnrc_pktsnip_t *pkt, ipv6_hdr_t *ipv6,
}
pkt = pkt->next;
}
#ifdef MODULE_GNRC_SIXLOWPAN_ND
if ((tl2a_len == 2) || (tl2a_len == 8)) {
/* The link-layer seems to be IEEE 802.15.4.
* Determining address length from the option length:
* https://tools.ietf.org/html/rfc4944#section-8 */
if (tl2a_opt->len == 1) {
tl2a_len = 2;
}
else if (tl2a_opt->len == 2) {
tl2a_len = 8;
}
else {
DEBUG("ndp: invalid target link-layer address option received\n");
return -EINVAL;
}
}
#endif
if (tl2a_len == 0) { /* in case there was no source address in l2 */
tl2a_len = (tl2a_opt->len / 8) - sizeof(ndp_opt_t);