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This adds the initial implementation of MGMT_OP_HCI_CMD_SYNC as documented in mgmt-api (BlueZ tree): Send HCI command and wait for event Command =========================================== Command Code: 0x005B Controller Index: <controller id> Command Parameters: Opcode (2 Octets) Event (1 Octet) Timeout (1 Octet) Parameter Length (2 Octets) Parameter (variable) Return Parameters: Response (1-variable Octets) This command may be used to send a HCI command and wait for an (optional) event. The HCI command is specified by the Opcode, any arbitrary is supported including vendor commands, but contrary to the like of Raw/User channel it is run as an HCI command send by the kernel since it uses its command synchronization thus it is possible to wait for a specific event as a response. Setting event to 0x00 will cause the command to wait for either HCI Command Status or HCI Command Complete. Timeout is specified in seconds, setting it to 0 will cause the default timeout to be used. Possible errors: Failed Invalid Parameters Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>