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Bluetooth: controller: Fix handling zero length L2CAP start frame

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Added a fix handling L2CAP start frame with payload length
of zero which otherwise sent zero length data start PDU on
air.

Signed-off-by: Vinayak Kariappa Chettimada <vich@nordicsemi.no>
This commit is contained in:
Vinayak Kariappa Chettimada 2019-06-25 17:58:29 +05:30 • committed by Carles Cufí
commit 4fe004ad87
3 changed files with 39 additions and 9 deletions
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21
subsys/bluetooth/controller/ll_sw/ctrl.c
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@ -9177,6 +9177,26 @@ static void packet_tx_enqueue(u8_t max)
pdu_data_q_tx->handle);
if (conn->handle == pdu_data_q_tx->handle) {
if (IS_ENABLED(CONFIG_BT_CTLR_LLID_DATA_START_EMPTY)) {
struct pdu_data *p;
p = (void *)node_tx_new->pdu_data;
if ((p->ll_id == PDU_DATA_LLID_DATA_START) &&
!p->len) {
conn->start_empty = 1U;
pdu_node_tx_release(conn->handle,
node_tx_new);
goto packet_tx_enqueue_release;
} else if (p->len && conn->start_empty) {
conn->start_empty = 0U;
if (p->ll_id ==
PDU_DATA_LLID_DATA_CONTINUE) {
p->ll_id =
PDU_DATA_LLID_DATA_START;
}
}
}
if (conn->pkt_tx_data == 0) {
conn->pkt_tx_data = node_tx_new;
@ -9204,6 +9224,7 @@ static void packet_tx_enqueue(u8_t max)
pdu_node_tx_release(pdu_data_q_tx->handle, node_tx_new);
}
packet_tx_enqueue_release:
first = _radio.packet_tx_first + 1;
if (first == _radio.packet_tx_count) {
first = 0U;