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

gnrc_lorawan: Ensure minimal packet length

Browse Source
This commit is contained in:
Teufelchen1 2024-10-01 12:11:05 +02:00
parent 61df141332
commit 51537908d1
1 changed files with 9 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/net/gnrc/link_layer/lorawan/gnrc_lorawan_mcps.c
View File

@ -116,6 +116,10 @@ int gnrc_lorawan_parse_dl(gnrc_lorawan_t *mac, uint8_t *buf, size_t len,
pkt->fopts.iol_base = buf;
pkt->fopts.iol_len = fopts_length;
buf += fopts_length;
if (buf >= p_mic) {
DEBUG("gnrc_lorawan: packet with fopts but no payload. Drop\n");
return -1;
}
}
if (buf < p_mic) {
@ -165,6 +169,11 @@ void gnrc_lorawan_mcps_process_downlink(gnrc_lorawan_t *mac, uint8_t *psdu,
{
struct parsed_packet _pkt;
if (size < sizeof(lorawan_hdr_t) + MIC_SIZE) {
DEBUG("gnrc_lorawan: invalid psdu size\n");
return;
}
/* NOTE: MIC is in pkt */
if (!gnrc_lorawan_mic_is_valid(psdu, size, mac->ctx.snwksintkey,
mac->mcps.fcnt, gnrc_lorawan_optneg_is_set(mac))) {