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