It will register notification and indication handler for given parameters.
Proper callback should be send with status of registration.
---
android/gatt.c | 192 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 190 insertions(+), 2 deletions(-)
diff --git a/android/gatt.c b/android/gatt.c
index d6a0a2a..d7ea745 100644
--- a/android/gatt.c
+++ b/android/gatt.c
@@ -51,6 +51,7 @@
struct gatt_client {
int32_t id;
uint8_t uuid[16];
+ struct queue *notifications;
};
struct element_id {
@@ -70,6 +71,16 @@ struct service {
struct queue *chars;
};
+struct notification_data {
+ struct hal_gatt_srvc_id service;
+ struct hal_gatt_gatt_id ch;
+ struct gatt_client *client;
+ struct gatt_device *dev;
+ guint notif_id;
+ guint ind_id;
+ int ref;
+};
+
struct gatt_device {
bdaddr_t bdaddr;
uint8_t bdaddr_type;
@@ -204,6 +215,56 @@ static bool match_char_by_higher_inst_id(const void *data,
return inst_id < ch->id.instance;
}
+static bool match_char_by_instance(const void *data, const void *user_data)
+{
+ const struct characteristic *ch = data;
+ uint8_t inst_id = PTR_TO_INT(user_data);
+
+ return inst_id == ch->id.instance;
+}
+
+static bool match_notification(const void *a, const void *b)
+{
+ const struct notification_data *a1 = a;
+ const struct notification_data *b1 = b;
+
+ if (bacmp(&a1->dev->bdaddr, &b1->dev->bdaddr))
+ return false;
+
+ if (memcmp(&a1->ch, &b1->ch, sizeof(a1->ch)))
+ return false;
+
+ if (memcmp(&a1->service, &b1->service, sizeof(a1->service)))
+ return false;
+
+ return true;
+}
+
+static void destroy_notification(void *data)
+{
+ struct notification_data *notification = data;
+
+ if (--notification->ref)
+ return;
+
+ queue_remove_if(notification->client->notifications, match_notification,
+ notification);
+ free(notification);
+}
+
+static void unregister_notification(void *data)
+{
+ struct notification_data *notification = data;
+
+ if (notification->notif_id)
+ g_attrib_unregister(notification->dev->attrib,
+ notification->notif_id);
+
+ if (notification->ind_id)
+ g_attrib_unregister(notification->dev->attrib,
+ notification->ind_id);
+}
+
static void destroy_device(void *data)
{
struct gatt_device *dev = data;
@@ -216,6 +277,27 @@ static void destroy_device(void *data)
free(dev);
}
+static void destroy_gatt_client(void *data)
+{
+ struct gatt_client *client = data;
+
+ /* First we want to get all notifications and unregister them.
+ * We don't pass unregister_notification to queue_destroy,
+ * because destroy notification performs operations on queue
+ * too. So remove all elements and then destroy queue.
+ */
+ while (queue_peek_head(client->notifications)) {
+ struct notification_data *notification;
+
+ notification = queue_pop_head(client->notifications);
+ unregister_notification(notification);
+ }
+
+ queue_destroy(client->notifications, free);
+
+ free(client);
+}
+
static void handle_client_register(const void *buf, uint16_t len)
{
const struct hal_cmd_gatt_client_register *cmd = buf;
@@ -247,6 +329,14 @@ static void handle_client_register(const void *buf, uint16_t len)
memcpy(client->uuid, cmd->uuid, sizeof(client->uuid));
+ client->notifications = queue_new();
+ if (!client->notifications) {
+ error("gatt: couldn't allocate notifications queue");
+ destroy_gatt_client(client);
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
client->id = client_cnt++;
queue_push_head(gatt_clients, client);
@@ -281,7 +371,7 @@ static void handle_client_unregister(const void *buf, uint16_t len)
goto failed;
}
- free(cl);
+ destroy_gatt_client(cl);
status = HAL_STATUS_SUCCESS;
failed:
@@ -1311,11 +1401,109 @@ static void handle_client_execute_write(const void *buf, uint16_t len)
static void handle_client_register_for_notification(const void *buf,
uint16_t len)
{
+ const struct hal_cmd_gatt_client_register_for_notification *cmd = buf;
+ struct notification_data *notification;
+ char uuid[MAX_LEN_UUID_STR];
+ struct gatt_client *client;
+ struct characteristic *c;
+ struct element_id match_id;
+ struct gatt_device *dev;
+ struct service *service;
+ uint8_t status;
+ bdaddr_t addr;
+
DBG("");
+ client = find_client_by_id(cmd->client_if);
+ if (!client) {
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ android2bdaddr((bdaddr_t *)&cmd->bdaddr, &addr);
+
+ dev = queue_find(conn_list, match_dev_by_bdaddr, &addr);
+ if (!dev) {
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ hal_srvc_id_to_element_id(&cmd->srvc_id, &match_id);
+ service = queue_find(dev->services, match_srvc_by_element_id,
+ &match_id);
+ bt_uuid_to_string(&match_id.uuid, uuid, MAX_LEN_UUID_STR);
+ if (!service) {
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ c = queue_find(service->chars, match_char_by_instance,
+ INT_TO_PTR(cmd->char_id.inst_id));
+ if (!c) {
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ notification = new0(struct notification_data, 1);
+ if (!notification) {
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ memcpy(¬ification->ch, &cmd->char_id, sizeof(notification->ch));
+ memcpy(¬ification->service, &cmd->srvc_id,
+ sizeof(notification->service));
+ notification->dev = dev;
+ notification->client = client;
+
+ if (queue_find(client->notifications, match_notification,
+ notification)) {
+ free(notification);
+ status = HAL_STATUS_SUCCESS;
+ goto failed;
+ }
+
+ notification->notif_id = g_attrib_register(dev->attrib,
+ ATT_OP_HANDLE_NOTIFY,
+ c->ch.value_handle,
+ NULL, notification,
+ destroy_notification);
+ if (!notification->notif_id) {
+ free(notification);
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ notification->ind_id = g_attrib_register(dev->attrib, ATT_OP_HANDLE_IND,
+ c->ch.value_handle,
+ NULL, notification,
+ destroy_notification);
+ if (!notification->ind_id) {
+ g_attrib_unregister(dev->attrib, notification->notif_id);
+ free(notification);
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ /* Because same data - notification - is shared by two handlers, we
+ * introduce ref counter to be sure that data can be freed with no risk.
+ * Counter is decremented in destroy_notification.
+ */
+ notification->ref = 2;
+
+ if (!queue_push_tail(client->notifications, notification)) {
+ unregister_notification(notification);
+ status = HAL_STATUS_FAILED;
+ goto failed;
+ }
+
+ status = HAL_STATUS_SUCCESS;
+
+failed:
+ /* TODO: send callback with notification enabled/disabled */
ipc_send_rsp(hal_ipc, HAL_SERVICE_ID_GATT,
HAL_OP_GATT_CLIENT_REGISTER_FOR_NOTIFICATION,
- HAL_STATUS_FAILED);
+ status);
}
static void handle_client_deregister_for_notification(const void *buf,
--
1.8.3.1
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