This patch implements the "Find Information" request for the GATT
server role.
---
src/shared/gatt-server.c | 154 ++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 153 insertions(+), 1 deletion(-)
diff --git a/src/shared/gatt-server.c b/src/shared/gatt-server.c
index 6c5ea2b..1388db7 100644
--- a/src/shared/gatt-server.c
+++ b/src/shared/gatt-server.c
@@ -57,6 +57,7 @@ struct bt_gatt_server {
unsigned int mtu_id;
unsigned int read_by_grp_type_id;
unsigned int read_by_type_id;
+ unsigned int find_info_id;
struct async_read_op *pending_read_op;
@@ -73,11 +74,12 @@ static void bt_gatt_server_free(struct bt_gatt_server *server)
bt_att_unregister(server->att, server->mtu_id);
bt_att_unregister(server->att, server->read_by_grp_type_id);
bt_att_unregister(server->att, server->read_by_type_id);
- bt_att_unref(server->att);
+ bt_att_unregister(server->att, server->find_info_id);
if (server->pending_read_op)
server->pending_read_op->server = NULL;
+ bt_att_unref(server->att);
free(server);
}
@@ -494,6 +496,148 @@ error:
NULL, NULL, NULL);
}
+static void put_uuid_le(const bt_uuid_t *src, void *dst)
+{
+ bt_uuid_t uuid;
+
+ switch (src->type) {
+ case BT_UUID16:
+ put_le16(src->value.u16, dst);
+ break;
+ case BT_UUID128:
+ bswap_128(&src->value.u128, dst);
+ break;
+ case BT_UUID32:
+ bt_uuid_to_uuid128(src, &uuid);
+ bswap_128(&uuid.value.u128, dst);
+ break;
+ default:
+ break;
+ }
+}
+
+static bool encode_find_info_rsp(struct gatt_db *db, struct queue *q,
+ uint16_t mtu,
+ uint8_t *pdu, uint16_t *len)
+{
+ uint16_t handle;
+ const bt_uuid_t *type;
+ int uuid_len, cur_uuid_len;
+ int iter = 0;
+
+ *len = 0;
+
+ while (queue_peek_head(q)) {
+ handle = PTR_TO_UINT(queue_pop_head(q));
+ type = gatt_db_get_attribute_type(db, handle);
+ if (!type)
+ return false;
+
+ cur_uuid_len = bt_uuid_len(type);
+
+ if (iter == 0) {
+ switch (cur_uuid_len) {
+ case 2:
+ uuid_len = 2;
+ pdu[0] = 0x01;
+ break;
+ case 4:
+ case 16:
+ uuid_len = 16;
+ pdu[0] = 0x02;
+ break;
+ default:
+ return false;
+ }
+
+ iter++;
+ } else if (cur_uuid_len != uuid_len)
+ break;
+
+ if (iter + uuid_len + 2 > mtu - 1)
+ break;
+
+ put_le16(handle, pdu + iter);
+ put_uuid_le(type, pdu + iter + 2);
+
+ iter += uuid_len + 2;
+ }
+
+ *len = iter;
+
+ return true;
+}
+
+static void find_info_cb(uint8_t opcode, const void *pdu,
+ uint16_t length, void *user_data)
+{
+ struct bt_gatt_server *server = user_data;
+ uint16_t start, end;
+ uint16_t mtu = bt_att_get_mtu(server->att);
+ uint8_t rsp_pdu[mtu];
+ uint16_t rsp_len;
+ uint8_t rsp_opcode;
+ uint8_t ecode = 0;
+ uint16_t ehandle = 0;
+ struct queue *q = NULL;
+
+ if (length != 4) {
+ ecode = BT_ATT_ERROR_INVALID_PDU;
+ goto error;
+ }
+
+ q = queue_new();
+ if (!q) {
+ ecode = BT_ATT_ERROR_INSUFFICIENT_RESOURCES;
+ goto error;
+ }
+
+ start = get_le16(pdu);
+ end = get_le16(pdu + 2);
+
+ util_debug(server->debug_callback, server->debug_data,
+ "Find Info - start: 0x%04x end: 0x%04x",
+ start, end);
+
+ if (!start || !end) {
+ ecode = BT_ATT_ERROR_INVALID_HANDLE;
+ goto error;
+ }
+
+ ehandle = start;
+
+ if (start > end) {
+ ecode = BT_ATT_ERROR_INVALID_HANDLE;
+ goto error;
+ }
+
+ gatt_db_find_information(server->db, start, end, q);
+
+ if (queue_isempty(q)) {
+ ecode = BT_ATT_ERROR_ATTRIBUTE_NOT_FOUND;
+ goto error;
+ }
+
+ if (!encode_find_info_rsp(server->db, q, mtu, rsp_pdu, &rsp_len)) {
+ ecode = BT_ATT_ERROR_UNLIKELY;
+ goto error;
+ }
+
+ rsp_opcode = BT_ATT_OP_FIND_INFO_RSP;
+
+ goto done;
+
+error:
+ rsp_opcode = BT_ATT_OP_ERROR_RSP;
+ rsp_len = 4;
+ encode_error_rsp(opcode, ehandle, ecode, rsp_pdu);
+
+done:
+ queue_destroy(q, NULL);
+ bt_att_send(server->att, rsp_opcode, rsp_pdu, rsp_len,
+ NULL, NULL, NULL);
+}
+
static void exchange_mtu_cb(uint8_t opcode, const void *pdu,
uint16_t length, void *user_data)
{
@@ -550,6 +694,14 @@ static bool gatt_server_register_att_handlers(struct bt_gatt_server *server)
if (!server->read_by_type_id)
return false;
+ /* Find Information */
+ server->find_info_id = bt_att_register(server->att,
+ BT_ATT_OP_FIND_INFO_REQ,
+ find_info_cb,
+ server, NULL);
+ if (!server->find_info_id)
+ return false;
+
return true;
}
--
2.1.0.rc2.206.gedb03e5
--
To unsubscribe from this list: send the line "unsubscribe linux-bluetooth" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
