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/*
* Copyright 2021 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#pragma once
#include <stdint.h>
/*
* This interface is shared between Android and Trusty. There is a copy in each
* repository. They must be kept in sync.
*/
#define CONFIRMATIONUI_PORT "com.android.trusty.confirmationui"
/**
* enum confirmationui_cmd - command identifiers for ConfirmationUI interface
* @CONFIRMATIONUI_RESP_BIT: response bit set as part of response
* @CONFIRMATIONUI_REQ_SHIFT: number of bits used by response bit
* @CONFIRMATIONUI_CMD_INIT: command to initialize session
* @CONFIRMATIONUI_CMD_MSG: command to send ConfirmationUI messages
*/
enum confirmationui_cmd : uint32_t {
CONFIRMATIONUI_RESP_BIT = 1,
CONFIRMATIONUI_REQ_SHIFT = 1,
CONFIRMATIONUI_CMD_INIT = (1 << CONFIRMATIONUI_REQ_SHIFT),
CONFIRMATIONUI_CMD_MSG = (2 << CONFIRMATIONUI_REQ_SHIFT),
};
/**
* struct confirmationui_hdr - header for ConfirmationUI messages
* @cmd: command identifier
*
* Note that no messages return a status code. Any error on the server side
* results in the connection being closed. So, operations can be assumed to be
* successful if they return a response.
*/
struct confirmationui_hdr {
uint32_t cmd;
};
/**
* struct confirmationui_init_req - arguments for request to initialize a
* session
* @shm_len: length of memory region being shared
*
* A handle to a memory region must be sent along with this message. This memory
* is send to ConfirmationUI messages.
*/
struct confirmationui_init_req {
uint32_t shm_len;
};
/**
* struct confirmationui_msg_args - arguments for sending a message
* @msg_len: length of message being sent
*
* Contents of the message are located in the shared memory region that is
* established using %CONFIRMATIONUI_CMD_INIT.
*
* ConfirmationUI messages can travel both ways.
*/
struct confirmationui_msg_args {
uint32_t msg_len;
};
#define CONFIRMATIONUI_MAX_MSG_SIZE 0x2000
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