RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity

rpl: dao validity check

Browse Source
This commit is contained in:
Cenk Gündoğan 2015-08-19 19:18:15 +02:00
parent 050671c235
commit 8bbcb3ba51
1 changed files with 22 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sys/net/gnrc/routing/rpl/gnrc_rpl_control_messages.c
View File

@ -641,10 +641,32 @@ void gnrc_rpl_send_DAO_ACK(gnrc_rpl_dodag_t *dodag, ipv6_addr_t *destination, ui
gnrc_rpl_send(pkt, NULL, destination, &dodag->dodag_id);
}
static bool _gnrc_rpl_check_DAO_validity(gnrc_rpl_dao_t *dao, uint16_t len)
{
uint16_t expected_len = sizeof(*dao) + sizeof(icmpv6_hdr_t);
if ((dao->k_d_flags & GNRC_RPL_DAO_D_BIT)) {
expected_len += sizeof(ipv6_addr_t);
}
if (expected_len <= len) {
return true;
}
DEBUG("RPL: wrong DAO len: %d, expected: %d\n", len, expected_len);
return false;
}
void gnrc_rpl_recv_DAO(gnrc_rpl_dao_t *dao, ipv6_addr_t *src, uint16_t len)
{
gnrc_rpl_instance_t *inst = NULL;
gnrc_rpl_dodag_t *dodag = NULL;
if (!_gnrc_rpl_check_DAO_validity(dao, len)) {
return;
}
gnrc_rpl_opt_t *opts = (gnrc_rpl_opt_t *) (dao + 1);
if ((inst = gnrc_rpl_instance_get(dao->instance_id)) == NULL) {