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Merge pull request #20880 from Teufelchen1/fix/lora

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gnrc_lorawan: Ensure minimal packet length
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benpicco 2024-10-02 13:08:36 +00:00 committed by GitHub
commit 260e58fa52
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1 changed files with 9 additions and 0 deletions
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9
sys/net/gnrc/link_layer/lorawan/gnrc_lorawan_mcps.c
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@ -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))) {