This patch exports the "Service Changed" characteristic and its CCC
descriptor in btd_gatt_server.
---
src/gatt-server.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 47 insertions(+), 2 deletions(-)
diff --git a/src/gatt-server.c b/src/gatt-server.c
index 22faece..9af58a0 100644
--- a/src/gatt-server.c
+++ b/src/gatt-server.c
@@ -50,6 +50,10 @@ struct btd_gatt_server {
unsigned int db_id;
GIOChannel *le_io;
struct queue *device_states;
+ struct gatt_db_attribute *svc_chngd;
+ struct gatt_db_attribute *svc_chngd_ccc;
+ uint16_t svc_chngd_start;
+ uint16_t svc_chngd_end;
};
struct device_state {
@@ -355,16 +359,57 @@ static void populate_gap_service(struct btd_gatt_server *server)
gatt_db_service_set_active(service, true);
}
+static void gatt_svc_chngd_read_cb(struct gatt_db_attribute *attrib,
+ unsigned int id, uint16_t offset,
+ uint8_t opcode, bdaddr_t *bdaddr,
+ uint8_t bdaddr_type, void *user_data)
+{
+ struct btd_gatt_server *server = user_data;
+ uint8_t ecode = 0;
+ size_t len;
+ const uint8_t *value = NULL;
+ uint8_t bytes[4];
+
+ if (server->svc_chngd_start && server->svc_chngd_end) {
+ memset(bytes, 0, sizeof(bytes));
+ put_le16(server->svc_chngd_start, bytes);
+ put_le16(server->svc_chngd_end, bytes + 2);
+ len = 4;
+ } else {
+ len = 0;
+ }
+
+ if (offset > len) {
+ ecode = BT_ATT_ERROR_INVALID_OFFSET;
+ goto done;
+ }
+
+ len -= offset;
+ value = len ? &bytes[offset] : NULL;
+
+done:
+ gatt_db_attribute_read_result(attrib, id, ecode, value, len);
+}
+
static void populate_gatt_service(struct btd_gatt_server *server)
{
bt_uuid_t uuid;
struct gatt_db_attribute *service;
+ uint16_t start_handle;
/* Add the GATT service */
bt_uuid16_create(&uuid, UUID_GATT);
- service = gatt_db_add_service(server->db, &uuid, true, 1);
+ service = gatt_db_add_service(server->db, &uuid, true, 4);
+ gatt_db_attribute_get_service_handles(service, &start_handle, NULL);
+
+ bt_uuid16_create(&uuid, GATT_CHARAC_SERVICE_CHANGED);
+ server->svc_chngd = gatt_db_service_add_characteristic(service, &uuid,
+ BT_ATT_PERM_READ,
+ BT_GATT_CHRC_PROP_READ | BT_GATT_CHRC_PROP_INDICATE,
+ gatt_svc_chngd_read_cb, NULL, server);
- /* TODO: Add "Service Changed" characteristic and handle CCC */
+ server->svc_chngd_ccc = btd_gatt_server_add_ccc(server->adapter,
+ start_handle);
gatt_db_service_set_active(service, true);
}
--
2.2.0.rc0.207.ga3a616c
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