This patch implements bt_gatt_register, which sets up internal callbacks for
incoming notifications and indications, parses the PDU and provides it to the
upper layer. It also automatically sends out a confirmation when an indication
is received.
---
src/shared/gatt-helpers.c | 64 +++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 62 insertions(+), 2 deletions(-)
diff --git a/src/shared/gatt-helpers.c b/src/shared/gatt-helpers.c
index 5afe91e..f82bb59 100644
--- a/src/shared/gatt-helpers.c
+++ b/src/shared/gatt-helpers.c
@@ -1375,11 +1375,71 @@ bool bt_gatt_write_long_value(struct bt_att *att, bool reliable,
return true;
}
+struct notify_data {
+ struct bt_att *att;
+ bt_gatt_notify_callback_t callback;
+ void *user_data;
+ bt_gatt_destroy_func_t destroy;
+};
+
+static void notify_data_destroy(void *data)
+{
+ struct notify_data *notd = data;
+
+ if (notd->destroy)
+ notd->destroy(notd->user_data);
+
+ free(notd);
+}
+
+static void notify_cb(uint8_t opcode, const void *pdu, uint16_t length,
+ void *user_data)
+{
+ struct notify_data *data = user_data;
+ bool indication;
+ uint16_t value_handle;
+ const uint8_t *value = NULL;
+
+ indication = (opcode == BT_ATT_OP_HANDLE_VAL_IND);
+ value_handle = get_le16(pdu);
+
+ if (length > 2)
+ value = pdu + 2;
+
+ if (data->callback)
+ data->callback(value_handle, value, length - 2, data->user_data);
+
+ if (indication)
+ bt_att_send(data->att, BT_ATT_OP_HANDLE_VAL_CONF, NULL, 0,
+ NULL, NULL, NULL);
+}
+
unsigned int bt_gatt_register(struct bt_att *att, bool indications,
bt_gatt_notify_callback_t callback,
void *user_data,
bt_gatt_destroy_func_t destroy)
{
- /* TODO */
- return false;
+ struct notify_data *data;
+ uint8_t opcode;
+ unsigned int id;
+
+ if (!att)
+ return 0;
+
+ data = new0(struct notify_data, 1);
+ if (!data)
+ return 0;
+
+ data->att = att;
+ data->callback = callback;
+ data->user_data = user_data;
+ data->destroy = destroy;
+
+ opcode = indications ? BT_ATT_OP_HANDLE_VAL_IND : BT_ATT_OP_HANDLE_VAL_NOT;
+
+ id = bt_att_register(att, opcode, notify_cb, data, notify_data_destroy);
+ if (!id)
+ free(data);
+
+ return id;
}
--
2.0.0.526.g5318336
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