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Bluetooth: Controller: Fix DLE HCI params parsing

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LE Write Suggested Default Data Length and LE Set Data Length commands
are suggestions from host and should be validated only as per HCI
specification regarding internal setting of LLCP.

LLCP is allowed to use other values if needed.

Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
This commit is contained in:
Szymon Janc 2022-05-24 17:41:09 +02:00 • committed by Carles Cufí
commit 6673cb1f60
2 changed files with 46 additions and 4 deletions
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48
subsys/bluetooth/controller/ll_sw/ull_conn.c
View file

@ -684,14 +684,30 @@ uint8_t ll_version_ind_send(uint16_t handle)
}
#if defined(CONFIG_BT_CTLR_DATA_LENGTH)
static bool ll_len_validate(uint16_t tx_octets, uint16_t tx_time)
{
/* validate if within HCI allowed range */
if (!IN_RANGE(tx_octets, PDU_DC_PAYLOAD_SIZE_MIN,
PDU_DC_PAYLOAD_SIZE_MAX)) {
return false;
}
/* validate if within HCI allowed range */
if (!IN_RANGE(tx_time, PDU_DC_PAYLOAD_TIME_MIN,
PDU_DC_PAYLOAD_TIME_MAX_CODED)) {
return false;
}
return true;
}
uint32_t ll_length_req_send(uint16_t handle, uint16_t tx_octets,
uint16_t tx_time)
{
struct ll_conn *conn;
if (IS_ENABLED(CONFIG_BT_CTLR_PARAM_CHECK) &&
((tx_octets > LL_LENGTH_OCTETS_TX_MAX) ||
(tx_time > PDU_DC_PAYLOAD_TIME_MAX_CODED))) {
!ll_len_validate(tx_octets, tx_time)) {
return BT_HCI_ERR_INVALID_PARAM;
}
@ -778,7 +794,10 @@ void ll_length_default_get(uint16_t *max_tx_octets, uint16_t *max_tx_time)
uint32_t ll_length_default_set(uint16_t max_tx_octets, uint16_t max_tx_time)
{
/* TODO: parameter check (for BT 5.0 compliance) */
if (IS_ENABLED(CONFIG_BT_CTLR_PARAM_CHECK) &&
!ll_len_validate(max_tx_octets, max_tx_time)) {
return BT_HCI_ERR_INVALID_PARAM;
}
default_tx_octets = max_tx_octets;
default_tx_time = max_tx_time;
@ -8156,8 +8175,31 @@ uint8_t ull_dle_update_eff(struct ll_conn *conn)
return dle_changed;
}
static void ull_len_data_length_trim(uint16_t *tx_octets, uint16_t *tx_time)
{
#if defined(CONFIG_BT_CTLR_PHY_CODED)
uint16_t tx_time_max =
PDU_DC_MAX_US(LL_LENGTH_OCTETS_TX_MAX, PHY_CODED);
#else /* !CONFIG_BT_CTLR_PHY_CODED */
uint16_t tx_time_max =
PDU_DC_MAX_US(LL_LENGTH_OCTETS_TX_MAX, PHY_1M);
#endif /* !CONFIG_BT_CTLR_PHY_CODED */
/* trim to supported values */
if (*tx_octets > LL_LENGTH_OCTETS_TX_MAX) {
*tx_octets = LL_LENGTH_OCTETS_TX_MAX;
}
if (*tx_time > tx_time_max) {
*tx_time = tx_time_max;
}
}
void ull_dle_local_tx_update(struct ll_conn *conn, uint16_t tx_octets, uint16_t tx_time)
{
/* Trim to supported values */
ull_len_data_length_trim(&tx_octets, &tx_time);
conn->lll.dle.default_tx_octets = tx_octets;
#if defined(CONFIG_BT_CTLR_PHY)