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gatt_server: add minimal functionality to support modular GATT Server Server implementations

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This commit is contained in:
Matthias Ringwald 2016-11-01 18:40:45 +01:00
parent bb38f05734
commit 660ce36883
2 changed files with 87 additions and 0 deletions
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75
src/ble/att_db.c
View File

@ -1123,3 +1123,78 @@ void att_register_service_handler(att_service_handler_t * handler){
btstack_linked_list_add(&service_handlers, (btstack_linked_item_t*) handler);
}
// returns 1 if service found. only primary service.
int gatt_server_get_get_handle_range_for_service_with_uuid16(uint16_t uuid16, uint16_t * start_handle, uint16_t * end_handle){
uint16_t in_group = 0;
uint16_t prev_handle = 0;
uint8_t attribute_value[2];
int attribute_len = sizeof(attribute_value);
little_endian_store_16(attribute_value, 0, uuid16);
att_iterator_t it;
att_iterator_init(&it);
while (att_iterator_has_next(&it)){
att_iterator_fetch_next(&it);
int new_service_started = att_iterator_match_uuid16(&it, GATT_PRIMARY_SERVICE_UUID) || att_iterator_match_uuid16(&it, GATT_SECONDARY_SERVICE_UUID);
// close current tag, if within a group and a new service definition starts or we reach end of att db
if (in_group &&
(it.handle == 0 || new_service_started)){
*end_handle = prev_handle;
return 1;
}
// keep track of previous handle
prev_handle = it.handle;
// check if found
if (it.handle && new_service_started && attribute_len == it.value_len && memcmp(attribute_value, it.value, it.value_len) == 0){
*start_handle = it.handle;
in_group = 1;
}
}
return 0;
}
// returns 0 if not found
uint16_t gatt_server_get_value_handle_for_characteristic_with_uuid16(uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){
att_iterator_t it;
att_iterator_init(&it);
while (att_iterator_has_next(&it)){
att_iterator_fetch_next(&it);
if (it.handle && it.handle < start_handle) continue;
if (it.handle > end_handle) break; // (1)
if (it.handle == 0) break;
if (att_iterator_match_uuid16(&it, uuid16)) return it.handle;
}
return 0;
}
// returns 0 if not found
uint16_t gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(uint16_t start_handle, uint16_t end_handle, uint16_t uuid16){
att_iterator_t it;
att_iterator_init(&it);
int characteristic_found = 0;
while (att_iterator_has_next(&it)){
att_iterator_fetch_next(&it);
if (it.handle && it.handle < start_handle) continue;
if (it.handle > end_handle) break; // (1)
if (it.handle == 0) break;
if (att_iterator_match_uuid16(&it, uuid16)){
characteristic_found = 1;
continue;
}
if (att_iterator_match_uuid16(&it, GATT_PRIMARY_SERVICE_UUID)
|| att_iterator_match_uuid16(&it, GATT_SECONDARY_SERVICE_UUID)
|| att_iterator_match_uuid16(&it, GATT_CHARACTERISTICS_UUID)){
if (characteristic_found) break;
continue;
}
if (att_iterator_match_uuid16(&it, GATT_CLIENT_CHARACTERISTICS_CONFIGURATION)){
return it.handle;
}
}
return 0;
}

12
src/ble/att_db.h
View File

@ -173,6 +173,18 @@ void att_register_service_handler(att_service_handler_t * handler);
// experimental client API
uint16_t att_uuid_for_handle(uint16_t attribute_handle);
// experimental GATT Server API
// returns 1 if service found. only primary service.
int gatt_server_get_get_handle_range_for_service_with_uuid16(uint16_t uuid16, uint16_t * start_handle, uint16_t * end_handle);
// returns 0 if not found
uint16_t gatt_server_get_value_handle_for_characteristic_with_uuid16(uint16_t start_handle, uint16_t end_handle, uint16_t uuid16);
// returns 0 if not found
uint16_t gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(uint16_t start_handle, uint16_t end_handle, uint16_t uuid16);
#if defined __cplusplus
}
#endif