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att_server: add request can send now logic

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This commit is contained in:
Matthias Ringwald 2016-04-01 11:02:32 +02:00
parent 49d18261c1
commit 1b96b00705
2 changed files with 36 additions and 3 deletions
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31
src/ble/att_server.c
View File

@ -82,6 +82,7 @@ static att_server_state_t att_server_state;
static uint8_t att_client_addr_type;
static bd_addr_t att_client_address;
static uint8_t att_client_waiting_for_can_send;
static uint16_t att_request_size = 0;
static uint8_t att_request_buffer[ATT_REQUEST_BUFFER_SIZE];
@ -95,7 +96,6 @@ static btstack_packet_callback_registration_t sm_event_callback_registration;
static btstack_packet_handler_t att_client_packet_handler = NULL;
static void att_handle_value_indication_notify_client(uint8_t status, uint16_t client_handle, uint16_t attribute_handle){
if (!att_client_packet_handler) return;
uint8_t event[7];
@ -111,7 +111,6 @@ static void att_handle_value_indication_notify_client(uint8_t status, uint16_t c
}
static void att_emit_mtu_event(hci_con_handle_t con_handle, uint16_t mtu){
if (!att_client_packet_handler) return;
uint8_t event[6];
@ -125,6 +124,21 @@ static void att_emit_mtu_event(hci_con_handle_t con_handle, uint16_t mtu){
(*att_client_packet_handler)(HCI_EVENT_PACKET, 0, &event[0], sizeof(event));
}
static void att_emit_can_send_now_event(void){
if (att_client_packet_handler) return;
uint8_t event[] = { ATT_EVENT_CAN_SEND_NOW, 0};
(*att_client_packet_handler)(HCI_EVENT_PACKET, 0, &event[0], sizeof(event));
}
static void att_server_notify_can_send(void){
if (att_connection.con_handle == 0) return;
if (!att_client_waiting_for_can_send) return;
if (!att_dispatch_server_can_send_now(att_connection.con_handle)) return;
att_client_waiting_for_can_send = 0;
att_emit_can_send_now_event();
}
static void att_handle_value_indication_timeout(btstack_timer_source_t *ts){
uint16_t att_handle = att_handle_value_indication_handle;
att_handle_value_indication_notify_client(ATT_HANDLE_VALUE_INDICATION_TIMEOUT, att_connection.con_handle, att_handle);
@ -140,6 +154,8 @@ static void att_event_packet_handler (uint8_t packet_type, uint16_t channel, uin
case L2CAP_EVENT_CAN_SEND_NOW:
att_run();
// if we cannot send now, we'll get another l2cap can send now soon
att_server_notify_can_send();
break;
case HCI_EVENT_LE_META:
@ -399,7 +415,16 @@ void att_server_register_packet_handler(btstack_packet_handler_t handler){
int att_server_can_send_packet_now(void){
if (att_connection.con_handle == 0) return 0;
return att_dispatch_server_can_send_now(att_connection.con_handle);
int can_send = att_dispatch_server_can_send_now(att_connection.con_handle);
if (!can_send){
att_client_waiting_for_can_send = 1;
}
return can_send;
}
void att_server_request_can_send_now_event(){
att_client_waiting_for_can_send = 1;
att_server_notify_can_send();
}
int att_server_notify(uint16_t attribute_handle, uint8_t *value, uint16_t value_len){

8
src/ble/att_server.h
View File

@ -67,6 +67,14 @@ void att_server_register_packet_handler(btstack_packet_handler_t handler);
*/
int att_server_can_send_packet_now(void);
/**
* @brief Request emission of ATT_EVENT_CAN_SEND_NOW as soon as possible
* @note ATT_EVENT_CAN_SEND_NOW might be emitted during call to this function
* so packet handler should be ready to handle it
* @param local_cid
*/
void att_server_request_can_send_now_event(void);
/*
* @brief notify client about attribute value change
* @param attribute_handle