This patch implements the "Read" request for the GATT server role.
---
src/shared/gatt-server.c | 111 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 111 insertions(+)
diff --git a/src/shared/gatt-server.c b/src/shared/gatt-server.c
index db002db..5cf11a4 100644
--- a/src/shared/gatt-server.c
+++ b/src/shared/gatt-server.c
@@ -67,6 +67,7 @@ struct bt_gatt_server {
unsigned int find_info_id;
unsigned int write_id;
unsigned int write_cmd_id;
+ unsigned int read_id;
struct async_read_op *pending_read_op;
struct async_write_op *pending_write_op;
@@ -87,6 +88,7 @@ static void bt_gatt_server_free(struct bt_gatt_server *server)
bt_att_unregister(server->att, server->find_info_id);
bt_att_unregister(server->att, server->write_id);
bt_att_unregister(server->att, server->write_cmd_id);
+ bt_att_unregister(server->att, server->read_id);
if (server->pending_read_op)
server->pending_read_op->server = NULL;
@@ -758,6 +760,108 @@ error:
NULL, NULL, NULL);
}
+static void read_complete_cb(struct gatt_db_attribute *attr, int err,
+ const uint8_t *value, size_t len,
+ void *user_data)
+{
+ struct async_read_op *op = user_data;
+ struct bt_gatt_server *server = op->server;
+ uint16_t mtu;
+ uint16_t handle;
+
+ if (!server) {
+ async_read_op_destroy(op);
+ return;
+ }
+
+ mtu = bt_att_get_mtu(server->att);
+ handle = gatt_db_attribute_get_handle(attr);
+
+ if (err) {
+ uint8_t pdu[4];
+ uint8_t att_ecode = att_ecode_from_error(err);
+
+ encode_error_rsp(op->opcode, handle, att_ecode, pdu);
+ bt_att_send(server->att, BT_ATT_OP_ERROR_RSP, pdu, 4, NULL,
+ NULL, NULL);
+ async_read_op_destroy(op);
+ return;
+ }
+
+ /* TODO: Send Read Blob response based on the request */
+
+ bt_att_send(server->att, BT_ATT_OP_READ_RSP, len ? value : NULL,
+ MIN((unsigned) mtu - 1, len),
+ NULL, NULL, NULL);
+ async_read_op_destroy(op);
+}
+
+static void read_cb(uint8_t opcode, const void *pdu,
+ uint16_t length, void *user_data)
+{
+ struct bt_gatt_server *server = user_data;
+ uint16_t mtu = bt_att_get_mtu(server->att);
+ uint8_t error_pdu[4];
+ uint16_t handle = 0;
+ struct gatt_db_attribute *attr;
+ uint8_t ecode;
+ uint32_t perm;
+ struct async_read_op *op = NULL;
+
+ if (length != 2) {
+ ecode = BT_ATT_ERROR_INVALID_PDU;
+ goto error;
+ }
+
+ handle = get_le16(pdu);
+ attr = gatt_db_get_attribute(server->db, handle);
+ if (!attr) {
+ ecode = BT_ATT_ERROR_INVALID_HANDLE;
+ goto error;
+ }
+
+ util_debug(server->debug_callback, server->debug_data,
+ "Read - handle: 0x%04x", handle);
+
+ if (!gatt_db_attribute_get_permissions(attr, &perm)) {
+ ecode = BT_ATT_ERROR_INVALID_HANDLE;
+ goto error;
+ }
+
+ if (perm && !(perm & BT_ATT_PERM_READ)) {
+ ecode = BT_ATT_ERROR_READ_NOT_PERMITTED;
+ goto error;
+ }
+
+ if (server->pending_read_op) {
+ ecode = BT_ATT_ERROR_UNLIKELY;
+ goto error;
+ }
+
+ op = new0(struct async_read_op, 1);
+ if (!op) {
+ ecode = BT_ATT_ERROR_INSUFFICIENT_RESOURCES;
+ goto error;
+ }
+
+ op->opcode = opcode;
+ op->server = server;
+ server->pending_read_op = op;
+
+ if (gatt_db_attribute_read(attr, 0, opcode, NULL, read_complete_cb, op))
+ return;
+
+ ecode = BT_ATT_ERROR_UNLIKELY;
+
+error:
+ if (op)
+ async_read_op_destroy(op);
+
+ encode_error_rsp(opcode, handle, ecode, error_pdu);
+ bt_att_send(server->att, BT_ATT_OP_ERROR_RSP, error_pdu, 4, NULL, NULL,
+ NULL);
+}
+
static void exchange_mtu_cb(uint8_t opcode, const void *pdu,
uint16_t length, void *user_data)
{
@@ -836,6 +940,13 @@ static bool gatt_server_register_att_handlers(struct bt_gatt_server *server)
if (!server->write_cmd_id)
return false;
+ /* Read Request */
+ server->read_id = bt_att_register(server->att, BT_ATT_OP_READ_REQ,
+ read_cb,
+ server, NULL);
+ if (!server->read_id)
+ return false;
+
return true;
}
--
2.1.0.rc2.206.gedb03e5
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