From: Claudio Takahasi <claudio.takahasi@xxxxxxxxxxxxx>
Implements the adapter callback registration to allow asynchronous
tracking of the RSSI of an active connection.
---
src/adapter.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++
src/adapter.h | 13 +++++++
src/event.c | 9 +++--
3 files changed, 124 insertions(+), 3 deletions(-)
diff --git a/src/adapter.c b/src/adapter.c
index b189841..d3d302b 100644
--- a/src/adapter.c
+++ b/src/adapter.c
@@ -79,6 +79,8 @@
#define OFF_TIMER 3
+#define READ_RSSI_INTERVAL 2
+
static DBusConnection *connection = NULL;
static GSList *adapter_drivers = NULL;
@@ -104,6 +106,13 @@ struct service_auth {
struct btd_adapter *adapter;
};
+struct rssi_callback {
+ guint id;
+ btd_adapter_rssi_cb cb;
+ bdaddr_t bdaddr;
+ gpointer user_data;
+};
+
struct btd_adapter {
uint16_t dev_id;
int up;
@@ -151,6 +160,9 @@ struct btd_adapter {
gboolean name_stored;
GSList *loaded_drivers;
+
+ GSList *rssi_callbacks;
+ gint rssi_id;
};
static void adapter_set_pairable_timeout(struct btd_adapter *adapter,
@@ -2663,6 +2675,13 @@ void adapter_remove(struct btd_adapter *adapter)
/* Return adapter to down state if it was not up on init */
adapter_ops->restore_powered(adapter->dev_id);
+ g_slist_free(adapter->rssi_callbacks);
+
+ if (adapter->rssi_id) {
+ g_source_remove(adapter->rssi_id);
+ adapter->rssi_id = 0;
+ }
+
btd_adapter_unref(adapter);
}
@@ -3573,6 +3592,92 @@ void btd_adapter_unregister_powered_callback(struct btd_adapter *adapter,
g_slist_remove(adapter->powered_callbacks, cb);
}
+static gint rssi_id_cmp(gconstpointer a, gconstpointer b)
+{
+ const struct rssi_callback *rssicb = a;
+ guint id = GPOINTER_TO_UINT(b);
+
+ return rssicb->id - id;
+}
+
+void adapter_read_rssi_complete(struct btd_adapter *adapter, bdaddr_t *dba,
+ int8_t rssi)
+{
+ struct rssi_callback *rssicb;
+ GSList *list;
+
+ for (list = adapter->rssi_callbacks; list; list = list->next) {
+ rssicb = list->data;
+
+ if (bacmp(&rssicb->bdaddr, dba))
+ continue;
+
+ rssicb->cb(adapter, rssi, rssicb->user_data);
+ }
+}
+
+static gboolean read_rssi(gpointer user_data)
+{
+ struct btd_adapter *adapter = user_data;
+ struct rssi_callback *rssicb;
+ GSList *list;
+
+ for (list = adapter->rssi_callbacks; list; list = list->next) {
+ rssicb = list->data;
+ adapter_ops->read_rssi(adapter->dev_id, &rssicb->bdaddr);
+ }
+
+ return TRUE;
+}
+
+guint btd_adapter_register_rssi_callback(struct btd_adapter *adapter,
+ bdaddr_t *bda, btd_adapter_rssi_cb cb,
+ gpointer user_data)
+{
+ struct rssi_callback *rssicb;
+ static guint rssi_counter = 0;
+
+ rssicb = g_new0(struct rssi_callback, 1);
+
+ rssicb->id = ++rssi_counter;
+ rssicb->cb = cb;
+ bacpy(&rssicb->bdaddr, bda);
+ rssicb->user_data = user_data;
+
+ if (adapter->rssi_callbacks == NULL)
+ adapter->rssi_id = g_timeout_add_seconds(READ_RSSI_INTERVAL,
+ read_rssi, adapter);
+
+ adapter->rssi_callbacks =
+ g_slist_append(adapter->rssi_callbacks, rssicb);
+
+ return rssicb->id;
+}
+
+gboolean btd_adapter_unregister_rssi_callback(struct btd_adapter *adapter, guint id)
+{
+ struct rssi_callback *rssicb;
+ GSList *list;
+
+ list = g_slist_find_custom(adapter->rssi_callbacks,
+ GUINT_TO_POINTER(id), rssi_id_cmp);
+ if (!list)
+ return FALSE;
+
+ rssicb = list->data;
+
+ adapter->rssi_callbacks = g_slist_remove(adapter->rssi_callbacks,
+ rssicb);
+ g_free(rssicb);
+
+ if (adapter->rssi_callbacks == NULL) {
+ g_source_remove(adapter->rssi_id);
+ adapter->rssi_id = 0;
+ }
+
+ return TRUE;
+}
+
int btd_adapter_set_fast_connectable(struct btd_adapter *adapter,
gboolean enable)
{
diff --git a/src/adapter.h b/src/adapter.h
index 342530c..af6b908 100644
--- a/src/adapter.h
+++ b/src/adapter.h
@@ -132,6 +132,9 @@ gboolean adapter_has_discov_sessions(struct btd_adapter *adapter);
void adapter_suspend_discovery(struct btd_adapter *adapter);
void adapter_resume_discovery(struct btd_adapter *adapter);
+void adapter_read_rssi_complete(struct btd_adapter *adapter, bdaddr_t *dba,
+ int8_t rssi);
+
struct btd_adapter *btd_adapter_ref(struct btd_adapter *adapter);
void btd_adapter_unref(struct btd_adapter *adapter);
@@ -220,11 +223,21 @@ int adapter_ops_setup(void);
typedef void (*btd_adapter_powered_cb) (struct btd_adapter *adapter,
gboolean powered);
+
+typedef void (*btd_adapter_rssi_cb) (struct btd_adapter *adapter,
+ int8_t rssi, gpointer user_data);
+
void btd_adapter_register_powered_callback(struct btd_adapter *adapter,
btd_adapter_powered_cb cb);
void btd_adapter_unregister_powered_callback(struct btd_adapter *adapter,
btd_adapter_powered_cb cb);
+guint btd_adapter_register_rssi_callback(struct btd_adapter *adapter,
+ bdaddr_t *dba, btd_adapter_rssi_cb cb,
+ gpointer user_data);
+
+gboolean btd_adapter_unregister_rssi_callback(struct btd_adapter *adapter,
+ guint id);
/* If TRUE, enables fast connectabe, i.e. reduces page scan interval and changes
* type. If FALSE, disables fast connectable, i.e. sets page scan interval and
* type to default values. Valid for both connectable and discoverable modes. */
diff --git a/src/event.c b/src/event.c
index 4c613a3..5551cb6 100644
--- a/src/event.c
+++ b/src/event.c
@@ -486,8 +486,11 @@ void btd_event_txpower_read(bdaddr_t *local, bdaddr_t *peer, int8_t level)
void btd_event_rssi_read(bdaddr_t *local, bdaddr_t *peer, int8_t rssi)
{
- char peer_addr[18];
+ struct btd_adapter *adapter;
- ba2str(peer, peer_addr);
- DBG("%s RSSI: %d", peer_addr, rssi);
+ adapter = manager_find_adapter(local);
+ if (!adapter)
+ return;
+
+ adapter_read_rssi_complete(adapter, peer, rssi);
}
--
1.7.4.1
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