This patch registers the GAttrib notification handler for Refresh
Characteristic notification.
---
profiles/scanparam/scan.c | 36 +++++++++++++++++++++++++++++++++++-
1 file changed, 35 insertions(+), 1 deletion(-)
diff --git a/profiles/scanparam/scan.c b/profiles/scanparam/scan.c
index 59ff336..36e21f3 100644
--- a/profiles/scanparam/scan.c
+++ b/profiles/scanparam/scan.c
@@ -51,6 +51,8 @@ struct scan {
guint attioid;
uint16_t interval;
uint16_t window;
+ uint16_t refresh_handle;
+ uint16_t refresh_cb_id;
};
GSList *servers = NULL;
@@ -63,9 +65,30 @@ static gint scan_device_cmp(gconstpointer a, gconstpointer b)
return (device == scan->device ? 0 : -1);
}
+static void refresh_value_cb(const uint8_t *pdu, uint16_t len,
+ gpointer user_data)
+{
+ struct scan *scan = user_data;
+ uint16_t handle;
+
+ if (len < 4) { /* 1-byte opcode + 2-byte handle + refresh */
+ error("Malformed ATT notification");
+ return;
+ }
+
+ handle = att_get_u16(&pdu[1]);
+
+ if (handle != scan->refresh_handle)
+ return;
+
+ DBG("Server requires refresh: %d", pdu[3]);
+}
+
static void ccc_written_cb(guint8 status, const guint8 *pdu,
guint16 plen, gpointer user_data)
{
+ struct scan *scan = user_data;
+
if (status != 0) {
error("Write Scan Refresh CCC failed: %s",
att_ecode2str(status));
@@ -73,6 +96,10 @@ static void ccc_written_cb(guint8 status, const guint8 *pdu,
}
DBG("Scan Refresh: notification enabled");
+
+ scan->refresh_cb_id = g_attrib_register(scan->attrib,
+ ATT_OP_HANDLE_NOTIFY, refresh_value_cb,
+ user_data, NULL);
}
static void discover_descriptor_cb(guint8 status, const guint8 *pdu,
@@ -101,7 +128,7 @@ static void discover_descriptor_cb(guint8 status, const guint8 *pdu,
att_put_u16(GATT_CLIENT_CHARAC_CFG_NOTIF_BIT, value);
gatt_write_char(scan->attrib, handle, value, sizeof(value),
- ccc_written_cb, NULL);
+ ccc_written_cb, user_data);
done:
att_data_list_free(list);
}
@@ -133,6 +160,8 @@ static void refresh_discovered_cb(GSList *chars, guint8 status,
if (start >= end)
return;
+ scan->refresh_handle = chr->value_handle;
+
gatt_find_info(scan->attrib, start, end,
discover_descriptor_cb, user_data);
}
@@ -216,6 +245,11 @@ void scan_unregister(struct btd_device *device)
scan = l->data;
servers = g_slist_remove(servers, scan);
+ if (scan->refresh_cb_id) {
+ g_attrib_unregister(scan->attrib, scan->refresh_cb_id);
+ scan->refresh_cb_id = 0;
+ }
+
btd_device_remove_attio_callback(scan->device, scan->attioid);
btd_device_unref(scan->device);
g_attrib_unref(scan->attrib);
--
1.7.12
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