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ble_mesh: Update client message timeout calculation

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Since the behavior of sending segmented messages has been
changed properly, the calculation of timeout value which
will be used when sending an acknowledged message by a
client model also needs to be updated.
This commit is contained in:
lly 2020-05-08 19:49:48 +08:00
parent 42ccb7277f
commit b1efdd5eb1
3 changed files with 18 additions and 14 deletions
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4
components/bt/esp_ble_mesh/mesh_core/include/mesh_access.h
View file

@ -191,9 +191,9 @@ struct bt_mesh_model_op {
#define BLE_MESH_MODEL_NONE ((struct bt_mesh_model []){})
/** Length of a short Mesh MIC. */
#define BLE_MESH_MIC_SHORT 4
#define BLE_MESH_MIC_SHORT 4
/** Length of a long Mesh MIC. */
#define BLE_MESH_MIC_LONG 8
#define BLE_MESH_MIC_LONG 8
/** @def BLE_MESH_MODEL_OP_LEN
*

8
components/bt/esp_ble_mesh/mesh_core/transport.c
View file

@ -167,10 +167,16 @@ u8_t bt_mesh_get_seg_retrans_num(void)
s32_t bt_mesh_get_seg_retrans_timeout(u8_t ttl)
{
/* This function will be used when a client model sending an
* acknowledged message. And if the dst of a message is not
* a unicast address, the function will not be invoked.
* So we can directly use the SEG_RETRANSMIT_TIMEOUT_UNICAST
* macro here.
*/
struct seg_tx tx = {
.ttl = ttl,
};
return SEG_RETRANSMIT_TIMEOUT(&tx);
return SEG_RETRANSMIT_TIMEOUT_UNICAST(&tx);
}
void bt_mesh_set_hb_sub_dst(u16_t addr)

20
components/bt/esp_ble_mesh/mesh_models/client/client_common.c
View file

@ -185,7 +185,8 @@ static s32_t bt_mesh_client_calc_timeout(struct bt_mesh_msg_ctx *ctx,
need_seg = true; /* Needs segmentation */
}
mic_size = (need_seg && net_buf_simple_tailroom(msg) >= 8U) ? 8U : 4U;
mic_size = (need_seg && net_buf_simple_tailroom(msg) >= BLE_MESH_MIC_LONG) ?
BLE_MESH_MIC_LONG : BLE_MESH_MIC_SHORT;
if (need_seg) {
/* Based on the message length, calculate how many segments are needed.
@ -201,17 +202,14 @@ static s32_t bt_mesh_client_calc_timeout(struct bt_mesh_msg_ctx *ctx,
* messages, but if there are other messages between any two retrans-
* missions of the same segmented messages, then the whole time will
* be longer.
*
* Since the transport behavior has been changed, i.e. start retransmit
* timer after the last segment is sent, so we can simplify the timeout
* calculation here. And the retransmit timer will be started event if
* the attempts reaches ZERO when the dst is a unicast address.
*/
if (duration + HCI_TIME_FOR_START_ADV < seg_retrans_to) {
s32_t seg_duration = seg_count * (duration + HCI_TIME_FOR_START_ADV);
time = (seg_duration + seg_retrans_to) * (seg_retrans_num - 1) + seg_duration;
} else {
/* If the duration is bigger than the segment retransmit timeout
* value. In this situation, the segment retransmit timeout value
* may need to be optimized based on the "Network Transmit" value.
*/
time = seg_count * (duration + HCI_TIME_FOR_START_ADV) * seg_retrans_num;
}
s32_t seg_duration = seg_count * (duration + HCI_TIME_FOR_START_ADV);
time = (seg_duration + seg_retrans_to) * seg_retrans_num;
BT_INFO("Original timeout %dms, calculated timeout %dms", timeout, time);