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rpl: dis validity check

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This commit is contained in:
Cenk Gündoğan 2015-08-19 19:43:06 +02:00
parent b96e6b508a
commit 6738fd67ba
1 changed files with 17 additions and 0 deletions
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17
sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c
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@ -194,12 +194,29 @@ void gnrc_rpl_send_DIS(gnrc_rpl_dodag_t *dodag, ipv6_addr_t *destination)
gnrc_rpl_send(pkt, NULL, destination, (dodag ? &dodag->dodag_id : NULL));
}
static bool _gnrc_rpl_check_DIS_validity(gnrc_rpl_dis_t *dis, uint16_t len)
{
uint16_t expected_len = sizeof(*dis) + sizeof(icmpv6_hdr_t);
if (expected_len <= len) {
return true;
}
DEBUG("RPL: wrong DIS len: %d, expected: %d\n", len, expected_len);
return false;
}
void gnrc_rpl_recv_DIS(gnrc_rpl_dis_t *dis, ipv6_addr_t *src, ipv6_addr_t *dst, uint16_t len)
{
/* TODO handle Solicited Information Option */
(void) dis;
(void) len;
if (!_gnrc_rpl_check_DIS_validity(dis, len)) {
return;
}
if (ipv6_addr_is_multicast(dst)) {
for (uint8_t i = 0; i < GNRC_RPL_DODAGS_NUMOF; ++i) {
if (gnrc_rpl_dodags[i].state != 0) {