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att_dispatch: request another can send now event if needed

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This commit is contained in:
Matthias Ringwald 2018-02-01 12:28:31 +01:00
parent 7a705a928c
commit 047a7fd38a
1 changed files with 23 additions and 2 deletions
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25
src/ble/att_dispatch.c
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@ -59,6 +59,9 @@ struct {
// index of subscription that will get can send now first if waiting for it
static uint8_t att_round_robin;
// track can send now requests
static uint8_t can_send_now_pending;
static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *packet, uint16_t size){
uint8_t index;
uint8_t i;
@ -72,6 +75,7 @@ static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pa
break;
case HCI_EVENT_PACKET:
if (packet[0] != L2CAP_EVENT_CAN_SEND_NOW) break;
can_send_now_pending = 0;
for (i = 0; i < ATT_MAX; i++){
index = (att_round_robin + i) & 1;
if (subscriptions[index].packet_handler && subscriptions[index].waiting_for_can_send){
@ -83,6 +87,17 @@ static void att_packet_handler(uint8_t packet_type, uint16_t handle, uint8_t *pa
if (!hci_can_send_acl_le_packet_now()) break;
}
}
// check if more can send now events are needed
if (!can_send_now_pending){
for (i = 0; i < ATT_MAX; i++){
if (subscriptions[index].waiting_for_can_send){
can_send_now_pending = 1;
// note: con_handle is not used, so we can pass in anything
l2cap_request_can_send_fix_channel_now_event(0, L2CAP_CID_ATTRIBUTE_PROTOCOL);
break;
}
}
}
break;
default:
break;
@ -131,7 +146,10 @@ int att_dispatch_server_can_send_now(hci_con_handle_t con_handle){
*/
void att_dispatch_client_request_can_send_now_event(hci_con_handle_t con_handle){
subscriptions[ATT_CLIENT].waiting_for_can_send = 1;
l2cap_request_can_send_fix_channel_now_event(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL);
if (!can_send_now_pending){
can_send_now_pending = 1;
l2cap_request_can_send_fix_channel_now_event(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL);
}
}
/**
@ -142,7 +160,10 @@ void att_dispatch_client_request_can_send_now_event(hci_con_handle_t con_handle)
*/
void att_dispatch_server_request_can_send_now_event(hci_con_handle_t con_handle){
subscriptions[ATT_SERVER].waiting_for_can_send = 1;
l2cap_request_can_send_fix_channel_now_event(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL);
if (!can_send_now_pending){
can_send_now_pending = 1;
l2cap_request_can_send_fix_channel_now_event(con_handle, L2CAP_CID_ATTRIBUTE_PROTOCOL);
}
}
static void emit_mtu_exchange_complete(btstack_packet_handler_t packet_handler, hci_con_handle_t con_handle, uint16_t new_mtu){