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bluetil: Ensure advertisement length does not exceed pkt len

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This commit is contained in:
Teufelchen1 2024-10-01 14:18:02 +02:00
parent 61df141332
commit 84f1ae3635
1 changed files with 5 additions and 1 deletions
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6
sys/net/ble/bluetil/bluetil_ad/bluetil_ad.c
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@ -44,9 +44,13 @@ int bluetil_ad_find(const bluetil_ad_t *ad, uint8_t type,
unsigned pos = 0;
while ((pos + POS_TYPE) < ad->pos) {
while ((pos + POS_DATA) < ad->pos) {
uint8_t len = ad->buf[pos];
if (pos + len >= ad->pos) {
return BLUETIL_AD_NOMEM;
}
if (ad->buf[pos + POS_TYPE] == type) {
data->data = ad->buf + pos + POS_DATA;
data->len = len - 1; /* take away the type field */